summaryrefslogtreecommitdiff
path: root/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
blob: ea347fd82a7c7a91d6363d587893dbe827c17296 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
/** @file
  HII Library implementation that uses DXE protocols and services.

  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "InternalHiiLib.h"

#define GUID_CONFIG_STRING_TYPE 0x00
#define NAME_CONFIG_STRING_TYPE 0x01
#define PATH_CONFIG_STRING_TYPE 0x02

#define ACTION_SET_DEFAUTL_VALUE 0x01
#define ACTION_VALIDATE_SETTING  0x02

#define HII_LIB_DEFAULT_VARSTORE_SIZE  0x200

typedef struct {
  LIST_ENTRY          Entry;      // Link to Block array
  UINT16              Offset;
  UINT16              Width;
  UINT8               OpCode;
  UINT8               Scope;
} IFR_BLOCK_DATA;

//
// <ConfigHdr> Template
//
GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR16 mConfigHdrTemplate[] = L"GUID=00000000000000000000000000000000&NAME=0000&PATH=00";

EFI_FORM_BROWSER2_PROTOCOL  *mUefiFormBrowser2 = NULL;

//
// Template used to mark the end of a list of packages 
//
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_HII_PACKAGE_HEADER  mEndOfPakageList = {
  sizeof (EFI_HII_PACKAGE_HEADER),
  EFI_HII_PACKAGE_END
};

/**
  Extract Hii package list GUID for given HII handle.

  If HiiHandle could not be found in the HII database, then ASSERT.
  If Guid is NULL, then ASSERT.

  @param  Handle              Hii handle
  @param  Guid                Package list GUID

  @retval EFI_SUCCESS         Successfully extract GUID from Hii database.

**/
EFI_STATUS
EFIAPI
InternalHiiExtractGuidFromHiiHandle (
  IN      EFI_HII_HANDLE      Handle,
  OUT     EFI_GUID            *Guid
  )
{
  EFI_STATUS                   Status;
  UINTN                        BufferSize;
  EFI_HII_PACKAGE_LIST_HEADER  *HiiPackageList;

  ASSERT (Guid != NULL);
  ASSERT (Handle != NULL);

  //
  // Get HII PackageList
  //
  BufferSize = 0;
  HiiPackageList = NULL;

  Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, Handle, &BufferSize, HiiPackageList);
  ASSERT (Status != EFI_NOT_FOUND);
  
  if (Status == EFI_BUFFER_TOO_SMALL) {
    HiiPackageList = AllocatePool (BufferSize);
    ASSERT (HiiPackageList != NULL);

    Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, Handle, &BufferSize, HiiPackageList);
  }
  if (EFI_ERROR (Status)) {
    FreePool (HiiPackageList);
    return Status;
  }

  //
  // Extract GUID
  //
  CopyGuid (Guid, &HiiPackageList->PackageListGuid);

  FreePool (HiiPackageList);

  return EFI_SUCCESS;
}

/**
  Registers a list of packages in the HII Database and returns the HII Handle
  associated with that registration.  If an HII Handle has already been registered
  with the same PackageListGuid and DeviceHandle, then NULL is returned.  If there
  are not enough resources to perform the registration, then NULL is returned.
  If an empty list of packages is passed in, then NULL is returned.  If the size of
  the list of package is 0, then NULL is returned.

  The variable arguments are pointers which point to package header that defined 
  by UEFI VFR compiler and StringGather tool.

  #pragma pack (push, 1)
  typedef struct {
    UINT32                  BinaryLength;
    EFI_HII_PACKAGE_HEADER  PackageHeader;
  } EDKII_AUTOGEN_PACKAGES_HEADER;
  #pragma pack (pop)
  
  @param[in]  PackageListGuid  The GUID of the package list.
  @param[in]  DeviceHandle     If not NULL, the Device Handle on which 
                               an instance of DEVICE_PATH_PROTOCOL is installed.
                               This Device Handle uniquely defines the device that 
                               the added packages are associated with.
  @param[in]  ...              The variable argument list that contains pointers 
                               to packages terminated by a NULL.

  @retval NULL   A HII Handle has already been registered in the HII Database with
                 the same PackageListGuid and DeviceHandle.
  @retval NULL   The HII Handle could not be created.
  @retval NULL   An empty list of packages was passed in.
  @retval NULL   All packages are empty.
  @retval Other  The HII Handle associated with the newly registered package list.

**/
EFI_HII_HANDLE
EFIAPI
HiiAddPackages (
  IN CONST EFI_GUID    *PackageListGuid,
  IN       EFI_HANDLE  DeviceHandle  OPTIONAL,
  ...
  )
{
  EFI_STATUS                   Status;
  VA_LIST                      Args;
  UINT32                       *Package;
  EFI_HII_PACKAGE_LIST_HEADER  *PackageListHeader;
  EFI_HII_HANDLE               HiiHandle;
  UINT32                       Length;
  UINT8                        *Data;

  ASSERT (PackageListGuid != NULL);

  //
  // Calculate the length of all the packages in the variable argument list
  //
  for (Length = 0, VA_START (Args, DeviceHandle); (Package = VA_ARG (Args, UINT32 *)) != NULL; ) {
    Length += (ReadUnaligned32 (Package) - sizeof (UINT32));
  }
  VA_END (Args);

  //
  // If there are no packages in the variable argument list or all the packages 
  // are empty, then return a NULL HII Handle
  //
  if (Length == 0) {
    return NULL;
  }

  //
  // Add the length of the Package List Header and the terminating Package Header 
  //
  Length += sizeof (EFI_HII_PACKAGE_LIST_HEADER) + sizeof (EFI_HII_PACKAGE_HEADER);

  //
  // Allocate the storage for the entire Package List
  //
  PackageListHeader = AllocateZeroPool (Length);

  //
  // If the Package List can not be allocated, then return a NULL HII Handle
  //
  if (PackageListHeader == NULL) {
    return NULL;
  }

  //
  // Fill in the GUID and Length of the Package List Header
  //
  CopyGuid (&PackageListHeader->PackageListGuid, PackageListGuid);
  PackageListHeader->PackageLength = Length;

  //
  // Initialize a pointer to the beginning if the Package List data
  //
  Data = (UINT8 *)(PackageListHeader + 1);

  //
  // Copy the data from each package in the variable argument list
  //
  for (VA_START (Args, DeviceHandle); (Package = VA_ARG (Args, UINT32 *)) != NULL; ) {
    Length = ReadUnaligned32 (Package) - sizeof (UINT32);
    CopyMem (Data, Package + 1, Length);
    Data += Length;
  }
  VA_END (Args);

  //
  // Append a package of type EFI_HII_PACKAGE_END to mark the end of the package list
  //
  CopyMem (Data, &mEndOfPakageList, sizeof (mEndOfPakageList));

  //
  // Register the package list with the HII Database
  //
  Status = gHiiDatabase->NewPackageList (
                           gHiiDatabase, 
                           PackageListHeader, 
                           DeviceHandle, 
                           &HiiHandle
                           );
  if (EFI_ERROR (Status)) {
    HiiHandle = NULL;
  }

  //
  // Free the allocated package list
  //
  FreePool (PackageListHeader);

  //
  // Return the new HII Handle
  //
  return HiiHandle;
}

/**
  Removes a package list from the HII database.

  If HiiHandle is NULL, then ASSERT.
  If HiiHandle is not a valid EFI_HII_HANDLE in the HII database, then ASSERT.

  @param[in]  HiiHandle   The handle that was previously registered in the HII database

**/
VOID
EFIAPI
HiiRemovePackages (
  IN      EFI_HII_HANDLE      HiiHandle
  )
{
  EFI_STATUS Status;

  ASSERT (HiiHandle != NULL);
  Status = gHiiDatabase->RemovePackageList (gHiiDatabase, HiiHandle);
  ASSERT_EFI_ERROR (Status);
}


/**
  Retrieves the array of all the HII Handles or the HII handles of a specific
  package list GUID in the HII Database.
  This array is terminated with a NULL HII Handle.
  This function allocates the returned array using AllocatePool().
  The caller is responsible for freeing the array with FreePool().

  @param[in]  PackageListGuid  An optional parameter that is used to request 
                               HII Handles associated with a specific
                               Package List GUID.  If this parameter is NULL,
                               then all the HII Handles in the HII Database
                               are returned.  If this parameter is not NULL,
                               then zero or more HII Handles associated with 
                               PackageListGuid are returned.

  @retval NULL   No HII handles were found in the HII database
  @retval NULL   The array of HII Handles could not be retrieved
  @retval Other  A pointer to the NULL terminated array of HII Handles

**/
EFI_HII_HANDLE *
EFIAPI
HiiGetHiiHandles (
  IN CONST EFI_GUID  *PackageListGuid  OPTIONAL
  )
{
  EFI_STATUS      Status;
  UINTN           HandleBufferLength;
  EFI_HII_HANDLE  TempHiiHandleBuffer;
  EFI_HII_HANDLE  *HiiHandleBuffer;
  EFI_GUID        Guid;
  UINTN           Index1;
  UINTN           Index2;

  //
  // Retrieve the size required for the buffer of all HII handles.
  //
  HandleBufferLength = 0;
  Status = gHiiDatabase->ListPackageLists (
                           gHiiDatabase,
                           EFI_HII_PACKAGE_TYPE_ALL,
                           NULL,
                           &HandleBufferLength,
                           &TempHiiHandleBuffer
                           );

  //
  // If ListPackageLists() returns EFI_SUCCESS for a zero size, 
  // then there are no HII handles in the HII database.  If ListPackageLists() 
  // returns an error other than EFI_BUFFER_TOO_SMALL, then there are no HII 
  // handles in the HII database.
  //
  if (Status != EFI_BUFFER_TOO_SMALL) {
    //
    // Return NULL if the size can not be retrieved, or if there are no HII 
    // handles in the HII Database
    //
    return NULL;
  }

  //
  // Allocate the array of HII handles to hold all the HII Handles and a NULL terminator
  //
  HiiHandleBuffer = AllocateZeroPool (HandleBufferLength + sizeof (EFI_HII_HANDLE));
  if (HiiHandleBuffer == NULL) {
    //
    // Return NULL if allocation fails.
    //
    return NULL;
  }

  //
  // Retrieve the array of HII Handles in the HII Database
  //
  Status = gHiiDatabase->ListPackageLists (
                           gHiiDatabase,
                           EFI_HII_PACKAGE_TYPE_ALL,
                           NULL,
                           &HandleBufferLength,
                           HiiHandleBuffer
                           );
  if (EFI_ERROR (Status)) {
    //
    // Free the buffer and return NULL if the HII handles can not be retrieved.
    //
    FreePool (HiiHandleBuffer);
    return NULL;
  }

  if (PackageListGuid == NULL) {
    //
    // Return the NULL terminated array of HII handles in the HII Database
    //
    return HiiHandleBuffer;
  } else {
    for (Index1 = 0, Index2 = 0; HiiHandleBuffer[Index1] != NULL; Index1++) {
      Status = InternalHiiExtractGuidFromHiiHandle (HiiHandleBuffer[Index1], &Guid);
      ASSERT_EFI_ERROR (Status);
      if (CompareGuid (&Guid, PackageListGuid)) {
        HiiHandleBuffer[Index2++] = HiiHandleBuffer[Index1];       
      }
    }
    if (Index2 > 0) {
      HiiHandleBuffer[Index2] = NULL;
      return HiiHandleBuffer;
    } else {
      FreePool (HiiHandleBuffer);
      return NULL;
    }
  }
}

/**
  Converts all hex dtring characters in range ['A'..'F'] to ['a'..'f'] for 
  hex digits that appear between a '=' and a '&' in a config string.

  If ConfigString is NULL, then ASSERT().

  @param[in] ConfigString  Pointer to a Null-terminated Unicode string.

  @return  Pointer to the Null-terminated Unicode result string.

**/
EFI_STRING
EFIAPI
InternalHiiLowerConfigString (
  IN EFI_STRING  ConfigString
  )
{
  EFI_STRING  String;
  BOOLEAN     Lower;

  ASSERT (ConfigString != NULL);

  //
  // Convert all hex digits in range [A-F] in the configuration header to [a-f]
  //
  for (String = ConfigString, Lower = FALSE; *String != L'\0'; String++) {
    if (*String == L'=') {
      Lower = TRUE;
    } else if (*String == L'&') {
      Lower = FALSE;
    } else if (Lower && *String >= L'A' && *String <= L'F') {
      *String = (CHAR16) (*String - L'A' + L'a');
    }
  }

  return ConfigString;
}

/**
  Uses the BlockToConfig() service of the Config Routing Protocol to 
  convert <ConfigRequest> and a buffer to a <ConfigResp>

  If ConfigRequest is NULL, then ASSERT().
  If Block is NULL, then ASSERT().

  @param[in] ConfigRequest  Pointer to a Null-terminated Unicode string.
  @param[in] Block          Pointer to a block of data.
  @param[in] BlockSize      The zie, in bytes, of Block.

  @retval NULL   The <ConfigResp> string could not be generated.
  @retval Other  Pointer to the Null-terminated Unicode <ConfigResp> string.

**/
EFI_STRING
EFIAPI
InternalHiiBlockToConfig (
  IN CONST EFI_STRING  ConfigRequest,
  IN CONST UINT8       *Block,
  IN UINTN             BlockSize
  )
{
  EFI_STATUS  Status;
  EFI_STRING  ConfigResp;
  CHAR16      *Progress;

  ASSERT (ConfigRequest != NULL);
  ASSERT (Block != NULL);

  //
  // Convert <ConfigRequest> to <ConfigResp>
  //
  Status = gHiiConfigRouting->BlockToConfig (
                                gHiiConfigRouting,
                                ConfigRequest,
                                Block,
                                BlockSize,
                                &ConfigResp,
                                &Progress
                                );
  if (EFI_ERROR (Status)) {
    return NULL;
  }
  return ConfigResp;
}

/**
  Uses the BrowserCallback() service of the Form Browser Protocol to retrieve 
  or set uncommitted data.  If sata i being retrieved, then the buffer is 
  allocated using AllocatePool().  The caller is then responsible for freeing 
  the buffer using FreePool().

  @param[in]  VariableGuid    Pointer to an EFI_GUID structure.  This is an optional 
                              parameter that may be NULL.
  @param[in]  VariableName    Pointer to a Null-terminated Unicode string.  This 
                              is an optional parameter that may be NULL.
  @param[in]  SetResultsData  If not NULL, then this parameter specified the buffer
                              of uncommited data to set.  If this parameter is NULL,
                              then the caller is requesting to get the uncommited data
                              from the Form Browser.

  @retval NULL   The uncommitted data could not be retrieved.
  @retval Other  A pointer to a buffer containing the uncommitted data.

**/
EFI_STRING
EFIAPI
InternalHiiBrowserCallback (
  IN CONST EFI_GUID    *VariableGuid,  OPTIONAL
  IN CONST CHAR16      *VariableName,  OPTIONAL
  IN CONST EFI_STRING  SetResultsData  OPTIONAL
  )
{
  EFI_STATUS  Status;
  UINTN       ResultsDataSize;
  EFI_STRING  ResultsData;
  CHAR16      TempResultsData;

  //
  // Locate protocols
  //
  if (mUefiFormBrowser2 == NULL) {
    Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **) &mUefiFormBrowser2);
    if (EFI_ERROR (Status) || mUefiFormBrowser2 == NULL) {
      return NULL;
    }
  }

  ResultsDataSize = 0;

  if (SetResultsData != NULL) {
    //
    // Request to to set data in the uncommitted browser state information
    //
    ResultsData = SetResultsData;
  } else {
    //
    // Retrieve the length of the buffer required ResultsData from the Browser Callback
    //
    Status = mUefiFormBrowser2->BrowserCallback (
                              mUefiFormBrowser2,
                              &ResultsDataSize,
                              &TempResultsData,
                              TRUE,
                              VariableGuid,
                              VariableName
                              );
    
    if (!EFI_ERROR (Status)) {
      //
      // No Resluts Data, only allocate one char for '\0'
      //
      ResultsData = AllocateZeroPool (sizeof (CHAR16));
      return ResultsData;
    }

    if (Status != EFI_BUFFER_TOO_SMALL) {
      return NULL;
    }

    //
    // Allocate the ResultsData buffer
    //
    ResultsData = AllocateZeroPool (ResultsDataSize);
    if (ResultsData == NULL) {
      return NULL;
    }
  }

  //
  // Retrieve or set the ResultsData from the Browser Callback
  //
  Status = mUefiFormBrowser2->BrowserCallback (
                            mUefiFormBrowser2,
                            &ResultsDataSize,
                            ResultsData,
                            (BOOLEAN)(SetResultsData == NULL),
                            VariableGuid,
                            VariableName
                            );
  if (EFI_ERROR (Status)) {
    return NULL;
  }

  return ResultsData;
}

/**
  Allocates and returns a Null-terminated Unicode <ConfigHdr> string using routing 
  information that includes a GUID, an optional Unicode string name, and a device
  path.  The string returned is allocated with AllocatePool().  The caller is 
  responsible for freeing the allocated string with FreePool().
  
  The format of a <ConfigHdr> is as follows:

    GUID=<HexCh>32&NAME=<Char>NameLength&PATH=<HexChar>DevicePathSize<Null>

  @param[in]  Guid          Pointer to an EFI_GUID that is the routing information
                            GUID.  Each of the 16 bytes in Guid is converted to 
                            a 2 Unicode character hexidecimal string.  This is 
                            an optional parameter that may be NULL.
  @param[in]  Name          Pointer to a Null-terminated Unicode string that is 
                            the routing information NAME.  This is an optional 
                            parameter that may be NULL.  Each 16-bit Unicode 
                            character in Name is converted to a 4 character Unicode 
                            hexidecimal string.                        
  @param[in]  DriverHandle  The driver handle which supports a Device Path Protocol
                            that is the routing information PATH.  Each byte of
                            the Device Path associated with DriverHandle is converted
                            to a 2 Unicode character hexidecimal string.

  @retval NULL   DriverHandle does not support the Device Path Protocol.
  @retval Other  A pointer to the Null-terminate Unicode <ConfigHdr> string

**/
EFI_STRING
EFIAPI
HiiConstructConfigHdr (
  IN CONST EFI_GUID  *Guid,  OPTIONAL
  IN CONST CHAR16    *Name,  OPTIONAL
  IN EFI_HANDLE      DriverHandle
  )
{
  UINTN                     NameLength;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  UINTN                     DevicePathSize;
  CHAR16                    *String;
  CHAR16                    *ReturnString;
  UINTN                     Index;
  UINT8                     *Buffer;

  //
  // Compute the length of Name in Unicode characters.  
  // If Name is NULL, then the length is 0.
  //
  NameLength = 0;
  if (Name != NULL) {
    NameLength = StrLen (Name);
  }

  DevicePath = NULL;
  DevicePathSize = 0;
  //
  // Retrieve DevicePath Protocol associated with DriverHandle
  //
  if (DriverHandle != NULL) {
    DevicePath = DevicePathFromHandle (DriverHandle);
    if (DevicePath == NULL) {
      return NULL;
    }
    //
    // Compute the size of the device path in bytes
    //
    DevicePathSize = GetDevicePathSize (DevicePath);
  }

  //
  // GUID=<HexCh>32&NAME=<Char>NameLength&PATH=<HexChar>DevicePathSize <Null>
  // | 5 | sizeof (EFI_GUID) * 2 | 6 | NameStrLen*4 | 6 | DevicePathSize * 2 | 1 |
  //
  String = AllocateZeroPool ((5 + sizeof (EFI_GUID) * 2 + 6 + NameLength * 4 + 6 + DevicePathSize * 2 + 1) * sizeof (CHAR16));
  if (String == NULL) {
    return NULL;
  }

  //
  // Start with L"GUID="
  //
  ReturnString = StrCpy (String, L"GUID=");
  String += StrLen (String);

  if (Guid != NULL) {
    //
    // Append Guid converted to <HexCh>32
    //
    for (Index = 0, Buffer = (UINT8 *)Guid; Index < sizeof (EFI_GUID); Index++) {
      String += UnicodeValueToString (String, PREFIX_ZERO | RADIX_HEX, *(Buffer++), 2);
    }
  }
  
  //
  // Append L"&NAME="
  //
  StrCpy (String, L"&NAME=");
  String += StrLen (String);

  if (Name != NULL) {
    //
    // Append Name converted to <Char>NameLength
    //
    for (; *Name != L'\0'; Name++) {
      String += UnicodeValueToString (String, PREFIX_ZERO | RADIX_HEX, *Name, 4);
    }
  }

  //
  // Append L"&PATH="
  //
  StrCpy (String, L"&PATH=");
  String += StrLen (String);

  //
  // Append the device path associated with DriverHandle converted to <HexChar>DevicePathSize
  //
  for (Index = 0, Buffer = (UINT8 *)DevicePath; Index < DevicePathSize; Index++) {
    String += UnicodeValueToString (String, PREFIX_ZERO | RADIX_HEX, *(Buffer++), 2);
  }

  //
  // Null terminate the Unicode string
  //
  *String = L'\0';

  //
  // Convert all hex digits in range [A-F] in the configuration header to [a-f]
  //
  return InternalHiiLowerConfigString (ReturnString);
}

/**
  Convert the hex UNICODE encoding string of UEFI GUID, NAME or device path 
  to binary buffer from <ConfigHdr>.

  This is a internal function.

  @param  String                 UEFI configuration string.
  @param  Flag                   Flag specifies what type buffer will be retrieved.
  @param  Buffer                 Binary of Guid, Name or Device path.

  @retval EFI_INVALID_PARAMETER  Any incoming parameter is invalid.
  @retval EFI_OUT_OF_RESOURCES   Lake of resources to store neccesary structures.
  @retval EFI_SUCCESS            The buffer data is retrieved and translated to
                                 binary format.

**/
EFI_STATUS
InternalHiiGetBufferFromString (
  IN  EFI_STRING                 String,
  IN  UINT8                      Flag,
  OUT UINT8                      **Buffer
  )
{
  UINTN      Length;
  EFI_STRING ConfigHdr;
  CHAR16     *StringPtr;
  UINT8      *DataBuffer;
  CHAR16     TemStr[5];
  UINTN      Index;
  UINT8      DigitUint8;

  if (String == NULL || Buffer == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  
  DataBuffer = NULL;
  StringPtr  = NULL;
  ConfigHdr  = String;
  //
  // The content between 'GUID', 'NAME', 'PATH' of <ConfigHdr> and '&' of next element
  // or '\0' (end of configuration string) is the UNICODE %02x bytes encoding string.
  //
  for (Length = 0; *String != 0 && *String != L'&'; String++, Length++);

  switch (Flag) {
  case GUID_CONFIG_STRING_TYPE:
  case PATH_CONFIG_STRING_TYPE:
    //
    // The data in <ConfigHdr> is encoded as hex UNICODE %02x bytes in the same order
    // as the device path and Guid resides in RAM memory.
    // Translate the data into binary.
    //
    DataBuffer = (UINT8 *) AllocateZeroPool ((Length + 1) / 2);
    if (DataBuffer == NULL) {
      return EFI_OUT_OF_RESOURCES;
    }
    //
    // Convert binary byte one by one
    //
    ZeroMem (TemStr, sizeof (TemStr));
    for (Index = 0; Index < Length; Index ++) {
      TemStr[0] = ConfigHdr[Index];
      DigitUint8 = (UINT8) StrHexToUint64 (TemStr);
      if ((Index & 1) == 0) {
        DataBuffer [Index/2] = DigitUint8;
      } else {
        DataBuffer [Index/2] = (UINT8) ((DataBuffer [Index/2] << 4) + DigitUint8);
      }
    }
    
    *Buffer = DataBuffer;
    break;

  case NAME_CONFIG_STRING_TYPE:
    //
    // Convert Config String to Unicode String, e.g. "0041004200430044" => "ABCD"
    // 

    //
    // Add the tailling char L'\0'
    //
    DataBuffer = (UINT8 *) AllocateZeroPool ((Length/4 + 1) * sizeof (CHAR16));
    if (DataBuffer == NULL) {
      return EFI_OUT_OF_RESOURCES;
    }
    //
    // Convert character one by one
    //
    StringPtr = (CHAR16 *) DataBuffer;
    ZeroMem (TemStr, sizeof (TemStr));
    for (Index = 0; Index < Length; Index += 4) {
      StrnCpy (TemStr, ConfigHdr + Index, 4);
      StringPtr[Index/4] = (CHAR16) StrHexToUint64 (TemStr);
    }
    //
    // Add tailing L'\0' character
    //
    StringPtr[Index/4] = L'\0';

    *Buffer = DataBuffer;
    break;

  default:
    return EFI_INVALID_PARAMETER;
    break;
  }

  return EFI_SUCCESS;
}

/**
  This function checks VarOffset and VarWidth is in the block range.

  @param  BlockArray         The block array is to be checked. 
  @param  VarOffset          Offset of var to the structure
  @param  VarWidth           Width of var.
  
  @retval TRUE   This Var is in the block range.
  @retval FALSE  This Var is not in the block range.
**/
BOOLEAN
BlockArrayCheck (
  IN IFR_BLOCK_DATA  *BlockArray,
  IN UINT16          VarOffset,
  IN UINT16          VarWidth
  )
{
  LIST_ENTRY          *Link;
  IFR_BLOCK_DATA      *BlockData;
  
  //
  // No Request Block array, all vars are got.
  //
  if (BlockArray == NULL) {
    return TRUE;
  }
  
  //
  // Check the input var is in the request block range.
  //
  for (Link = BlockArray->Entry.ForwardLink; Link != &BlockArray->Entry; Link = Link->ForwardLink) {
    BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
    if ((VarOffset >= BlockData->Offset) && ((VarOffset + VarWidth) <= (BlockData->Offset + BlockData->Width))) {
      return TRUE;
    }
  }

  return FALSE;
}

/**
  Get the value of <Number> in <BlockConfig> format, i.e. the value of OFFSET
  or WIDTH or VALUE.
  <BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE'=<Number>

  @param  ValueString            String in <BlockConfig> format and points to the
                                 first character of <Number>.
  @param  ValueData              The output value. Caller takes the responsibility
                                 to free memory.
  @param  ValueLength            Length of the <Number>, in characters.

  @retval EFI_OUT_OF_RESOURCES   Insufficient resources to store neccessary
                                 structures.
  @retval EFI_SUCCESS            Value of <Number> is outputted in Number
                                 successfully.

**/
EFI_STATUS
EFIAPI
InternalHiiGetValueOfNumber (
  IN  EFI_STRING           ValueString,
  OUT UINT8                **ValueData,
  OUT UINTN                *ValueLength
  )
{
  EFI_STRING               StringPtr;
  UINTN                    Length;
  UINT8                    *Buf;
  UINT8                    DigitUint8;
  UINTN                    Index;
  CHAR16                   TemStr[2];

  ASSERT (ValueString != NULL && ValueData != NULL && ValueLength != NULL);
  ASSERT (*ValueString != L'\0');

  //
  // Get the length of value string
  //
  StringPtr = ValueString;
  while (*StringPtr != L'\0' && *StringPtr != L'&') {
    StringPtr++;
  }
  Length = StringPtr - ValueString;
  
  //
  // Allocate buffer to store the value
  //
  Buf = (UINT8 *) AllocateZeroPool ((Length + 1) / 2);
  if (Buf == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
  
  //
  // Convert character one by one to the value buffer
  //
  ZeroMem (TemStr, sizeof (TemStr));
  for (Index = 0; Index < Length; Index ++) {
    TemStr[0] = ValueString[Length - Index - 1];
    DigitUint8 = (UINT8) StrHexToUint64 (TemStr);
    if ((Index & 1) == 0) {
      Buf [Index/2] = DigitUint8;
    } else {
      Buf [Index/2] = (UINT8) ((DigitUint8 << 4) + Buf [Index/2]);
    }
  }
  
  //
  // Set the converted value and string length.
  //
  *ValueData    = Buf;
  *ValueLength  = Length;
  return EFI_SUCCESS;
}

/**
  This internal function parses IFR data to validate current setting.

  @param ConfigResp         ConfigResp string contains the current setting.
  @param HiiPackageList     Point to Hii package list.
  @param PackageListLength  The length of the pacakge.
  @param VarGuid            Guid of the buffer storage.
  @param VarName            Name of the buffer storage.
  
  @retval EFI_SUCCESS            The current setting is valid.
  @retval EFI_OUT_OF_RESOURCES   The memory is not enough.
  @retval EFI_INVALID_PARAMETER  The config string or the Hii package is invalid.
**/
EFI_STATUS
EFIAPI
InternalHiiValidateCurrentSetting (
  IN EFI_STRING                    ConfigResp,
  IN EFI_HII_PACKAGE_LIST_HEADER   *HiiPackageList,
  IN UINTN                         PackageListLength,
  IN EFI_GUID                      *VarGuid,
  IN CHAR16                        *VarName
  )
{ 
  IFR_BLOCK_DATA               *CurrentBlockArray;
  IFR_BLOCK_DATA               *BlockData;
  IFR_BLOCK_DATA               *NewBlockData;
  IFR_BLOCK_DATA               VarBlockData;
  EFI_STRING                   StringPtr;
  UINTN                        Length;
  UINT8                        *TmpBuffer;
  UINT16                       Offset;
  UINT16                       Width;
  UINT64                       VarValue;
  LIST_ENTRY                   *Link;
  UINT8                        *VarBuffer;
  UINTN                        MaxBufferSize;
  EFI_STATUS                   Status;
  EFI_HII_PACKAGE_HEADER       PacakgeHeader;
  UINT32                       PackageOffset;
  UINT8                        *PackageData;
  UINTN                        IfrOffset;
  EFI_IFR_OP_HEADER            *IfrOpHdr;
  EFI_IFR_VARSTORE             *IfrVarStore;
  EFI_IFR_ONE_OF               *IfrOneOf;
  EFI_IFR_NUMERIC              *IfrNumeric;
  EFI_IFR_ONE_OF_OPTION        *IfrOneOfOption;
  EFI_IFR_CHECKBOX             *IfrCheckBox;
  EFI_IFR_STRING               *IfrString;
  CHAR8                        *VarStoreName;
  UINTN                        Index;
  
  //
  // 1. Get the current setting to current block data array and Convert them into VarBuffer
  //

  //
  // Skip ConfigHdr string
  //
  StringPtr = ConfigResp;
  StringPtr = StrStr (ConfigResp, L"&OFFSET");
  if (StringPtr == NULL) {
    //
    // No ConfigBlock value is required to be validated.
    // EFI_SUCCESS directly return.
    //
    return EFI_SUCCESS;
  }
   
  //
  // Initialize the local variables.
  //
  Index         = 0;
  VarStoreName  = NULL;
  Status        = EFI_SUCCESS;
  BlockData     = NULL;
  NewBlockData  = NULL;
  TmpBuffer     = NULL;
  MaxBufferSize = HII_LIB_DEFAULT_VARSTORE_SIZE;
  VarBuffer     = AllocateZeroPool (MaxBufferSize);
  if (VarBuffer == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  //
  // Init CurrentBlockArray
  //
  CurrentBlockArray = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
  if (CurrentBlockArray == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto Done;
  }
  InitializeListHead (&CurrentBlockArray->Entry);
  
  //
  // Parse each <RequestElement> if exists
  // Only <BlockName> format is supported by this help function.
  // <BlockName> ::= &'OFFSET='<Number>&'WIDTH='<Number>
  //
  while (*StringPtr != 0 && StrnCmp (StringPtr, L"&OFFSET=", StrLen (L"&OFFSET=")) == 0) {
    //
    // Skip the &OFFSET= string
    // 
    StringPtr += StrLen (L"&OFFSET=");

    //
    // Get Offset
    //
    Status = InternalHiiGetValueOfNumber (StringPtr, &TmpBuffer, &Length);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    Offset = 0;
    CopyMem (
      &Offset,
      TmpBuffer,
      (((Length + 1) / 2) < sizeof (UINT16)) ? ((Length + 1) / 2) : sizeof (UINT16)
      );
    FreePool (TmpBuffer);
    TmpBuffer = NULL;

    StringPtr += Length;
    if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
    StringPtr += StrLen (L"&WIDTH=");

    //
    // Get Width
    //
    Status = InternalHiiGetValueOfNumber (StringPtr, &TmpBuffer, &Length);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    Width = 0;
    CopyMem (
      &Width,
      TmpBuffer,
      (((Length + 1) / 2) < sizeof (UINT16)) ? ((Length + 1) / 2) : sizeof (UINT16)
      );
    FreePool (TmpBuffer);
    TmpBuffer = NULL;

    StringPtr += Length;
    if (*StringPtr != 0 && *StringPtr != L'&') {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }

    if (StrnCmp (StringPtr, L"&VALUE=", StrLen (L"&VALUE=")) != 0) {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
    StringPtr += StrLen (L"&VALUE=");

    //
    // Get Value
    //
    Status = InternalHiiGetValueOfNumber (StringPtr, &TmpBuffer, &Length);
    if (EFI_ERROR (Status)) {
      goto Done;
    }

    StringPtr += Length;
    if (*StringPtr != 0 && *StringPtr != L'&') {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }

    //
    // Check whether VarBuffer is enough
    //
    if ((UINTN) (Offset + Width) > MaxBufferSize) {
      VarBuffer = ReallocatePool (
                    MaxBufferSize,
                    Offset + Width + HII_LIB_DEFAULT_VARSTORE_SIZE,
                    VarBuffer
                    );
      if (VarBuffer == NULL) {
        Status = EFI_OUT_OF_RESOURCES;
        goto Done;
      }
      MaxBufferSize = Offset + Width + HII_LIB_DEFAULT_VARSTORE_SIZE;
    }

    //
    // Update the Block with configuration info
    //
    CopyMem (VarBuffer + Offset, TmpBuffer, Width);
    FreePool (TmpBuffer);
    TmpBuffer = NULL;

    //
    // Set new Block Data
    //
    NewBlockData = (IFR_BLOCK_DATA *) AllocateZeroPool (sizeof (IFR_BLOCK_DATA));
    if (NewBlockData == NULL) {
      Status = EFI_OUT_OF_RESOURCES;
      goto Done;
    }
    NewBlockData->Offset = Offset;
    NewBlockData->Width  = Width;

    //
    // Insert the new block data into the block data array.
    //
    for (Link = CurrentBlockArray->Entry.ForwardLink; Link != &CurrentBlockArray->Entry; Link = Link->ForwardLink) {
      BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
      if (NewBlockData->Offset == BlockData->Offset) {
        if (NewBlockData->Width > BlockData->Width) {
          BlockData->Width = NewBlockData->Width;
        }
        FreePool (NewBlockData);
        break;
      } else if (NewBlockData->Offset < BlockData->Offset) {
        //
        // Insert new block data as the previous one of this link.
        //
        InsertTailList (Link, &NewBlockData->Entry);
        break;
      }
    }

    //
    // Insert new block data into the array tail.
    //
    if (Link == &CurrentBlockArray->Entry) {
      InsertTailList (Link, &NewBlockData->Entry);
    }

    //
    // If '\0', parsing is finished. 
    //
    if (*StringPtr == 0) {
      break;
    }
    //
    // Go to next ConfigBlock 
    //
  }

  //
  // Merge the aligned block data into the single block data.
  //
  Link = CurrentBlockArray->Entry.ForwardLink;
  while ((Link != &CurrentBlockArray->Entry) && (Link->ForwardLink != &CurrentBlockArray->Entry)) {
    BlockData = BASE_CR (Link, IFR_BLOCK_DATA, Entry);
    NewBlockData = BASE_CR (Link->ForwardLink, IFR_BLOCK_DATA, Entry);
    if ((NewBlockData->Offset >= BlockData->Offset) && (NewBlockData->Offset <= (BlockData->Offset + BlockData->Width))) {
      if ((NewBlockData->Offset + NewBlockData->Width) > (BlockData->Offset + BlockData->Width)) {
        BlockData->Width = (UINT16) (NewBlockData->Offset + NewBlockData->Width - BlockData->Offset);
      }
      RemoveEntryList (Link->ForwardLink);
      FreePool (NewBlockData);
      continue;
    }
    Link = Link->ForwardLink;      
  }
  
  if (IsListEmpty (&CurrentBlockArray->Entry)) {
    Status = EFI_SUCCESS;
    goto Done;
  }

  //
  // 2. Check IFR value is in block data, then Validate Value
  //
  ZeroMem (&VarBlockData, sizeof (VarBlockData));
  VarValue      = 0;
  IfrVarStore   = NULL;
  PackageOffset = sizeof (EFI_HII_PACKAGE_LIST_HEADER);
  while (PackageOffset < PackageListLength) {
    CopyMem (&PacakgeHeader, (UINT8 *) HiiPackageList + PackageOffset, sizeof (PacakgeHeader));
    
    //
    // Parse IFR opcode from the form package.
    //
    if (PacakgeHeader.Type == EFI_HII_PACKAGE_FORMS) {
      IfrOffset   = sizeof (PacakgeHeader);
      PackageData = (UINT8 *) HiiPackageList + PackageOffset;
      while (IfrOffset < PacakgeHeader.Length) {
        IfrOpHdr = (EFI_IFR_OP_HEADER *) (PackageData + IfrOffset);
        //
        // Validate current setting to the value built in IFR opcode
        //
        switch (IfrOpHdr->OpCode) {
        case EFI_IFR_VARSTORE_OP:          
          //
          // VarStoreId has been found. No further found.
          //
          if (IfrVarStore != NULL) {
            break;
          }
          //
          // Find the matched VarStoreId to the input VarGuid and VarName
          //
          IfrVarStore = (EFI_IFR_VARSTORE *) IfrOpHdr;
          if (CompareGuid ((EFI_GUID *) (VOID *) &IfrVarStore->Guid, VarGuid)) {
            VarStoreName = (CHAR8 *) IfrVarStore->Name;
            for (Index = 0; VarStoreName[Index] != 0; Index ++) {
              if ((CHAR16) VarStoreName[Index] != VarName[Index]) {
                break;
              }
            }
            //
            // The matched VarStore is found.
            //
            if ((VarStoreName[Index] != 0) || (VarName[Index] != 0)) {
              IfrVarStore = NULL;
            }
          } else {
            IfrVarStore = NULL;
          }
          break;
        case EFI_IFR_FORM_OP:
        case EFI_IFR_FORM_MAP_OP:
          //
          // Check the matched VarStoreId is found.
          //
          if (IfrVarStore == NULL) {
            Status = EFI_SUCCESS;
            goto Done;
          }
          break;
        case EFI_IFR_ONE_OF_OP:
          //
          // Check whether current value is the one of option.
          //

          //
          // OneOf question is not in IFR Form. This IFR form is not valid. 
          //
          if (IfrVarStore == NULL) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }
          // 
          // Check whether this question is for the requested varstore.
          //
          IfrOneOf = (EFI_IFR_ONE_OF *) IfrOpHdr;
          if (IfrOneOf->Question.VarStoreId != IfrVarStore->VarStoreId) {
            break;
          }
          
          //
          // Get Offset by Question header and Width by DataType Flags
          //
          Offset = IfrOneOf->Question.VarStoreInfo.VarOffset;
          Width  = (UINT16) (1 << (IfrOneOf->Flags & EFI_IFR_NUMERIC_SIZE));
          //
          // Check whether this question is in current block array.
          //
          if (!BlockArrayCheck (CurrentBlockArray, Offset, Width)) {
            //
            // This question is not in the current configuration string. Skip it.
            //
            break;
          }
          //
          // Check this var question is in the var storage 
          //
          if ((Offset + Width) > IfrVarStore->Size) {
            //
            // This question exceeds the var store size. 
            //
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }

          //
          // Get the current value for oneof opcode
          //
          VarValue = 0;
          CopyMem (&VarValue, VarBuffer +  Offset, Width);
          //
          // Set Block Data, to be checked in the following Oneof option opcode.
          //
          VarBlockData.Offset     = Offset;
          VarBlockData.Width      = Width;
          VarBlockData.OpCode     = IfrOpHdr->OpCode;
          VarBlockData.Scope      = IfrOpHdr->Scope;
          break;
        case EFI_IFR_NUMERIC_OP:
          //
          // Check the current value is in the numeric range.
          //

          //
          // Numeric question is not in IFR Form. This IFR form is not valid. 
          //
          if (IfrVarStore == NULL) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }
          //
          // Check whether this question is for the requested varstore.
          //
          IfrNumeric = (EFI_IFR_NUMERIC *) IfrOpHdr;
          if (IfrNumeric->Question.VarStoreId != IfrVarStore->VarStoreId) {
            break;
          }
          
          //
          // Get Offset by Question header and Width by DataType Flags
          //
          Offset = IfrNumeric->Question.VarStoreInfo.VarOffset;
          Width  = (UINT16) (1 << (IfrNumeric->Flags & EFI_IFR_NUMERIC_SIZE));
          //
          // Check whether this question is in current block array.
          //
          if (!BlockArrayCheck (CurrentBlockArray, Offset, Width)) {
            //
            // This question is not in the current configuration string. Skip it.
            //
            break;
          }
          //
          // Check this var question is in the var storage 
          //
          if ((Offset + Width) > IfrVarStore->Size) {
            //
            // This question exceeds the var store size. 
            //
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }

          //
          // Check the current value is in the numeric range.
          //
          VarValue = 0;
          CopyMem (&VarValue, VarBuffer +  Offset, Width);
          switch (IfrNumeric->Flags & EFI_IFR_NUMERIC_SIZE) {
          case EFI_IFR_NUMERIC_SIZE_1:
            if ((UINT8) VarValue < IfrNumeric->data.u8.MinValue || (UINT8) VarValue > IfrNumeric->data.u8.MaxValue) {
              //
              // Not in the valid range.
              //
              Status = EFI_INVALID_PARAMETER;
              goto Done;
            }
            break;
          case EFI_IFR_NUMERIC_SIZE_2:
            if ((UINT16) VarValue < IfrNumeric->data.u16.MinValue || (UINT16) VarValue > IfrNumeric->data.u16.MaxValue) {
              //
              // Not in the valid range.
              //
              Status = EFI_INVALID_PARAMETER;
              goto Done;
            }
            break;
          case EFI_IFR_NUMERIC_SIZE_4:
            if ((UINT32) VarValue < IfrNumeric->data.u32.MinValue || (UINT32) VarValue > IfrNumeric->data.u32.MaxValue) {
              //
              // Not in the valid range.
              //
              Status = EFI_INVALID_PARAMETER;
              goto Done;
            }
            break;
          case EFI_IFR_NUMERIC_SIZE_8:
            if ((UINT64) VarValue < IfrNumeric->data.u64.MinValue || (UINT64) VarValue > IfrNumeric->data.u64.MaxValue) {
              //
              // Not in the valid range.
              //
              Status = EFI_INVALID_PARAMETER;
              goto Done;
            }
            break;
          }

          break;
        case EFI_IFR_CHECKBOX_OP:
          //
          // Check value is BOOLEAN type, only 0 and 1 is valid.
          //

          //
          // CheckBox question is not in IFR Form. This IFR form is not valid. 
          //
          if (IfrVarStore == NULL) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }

          //
          // Check whether this question is for the requested varstore.
          //
          IfrCheckBox = (EFI_IFR_CHECKBOX *) IfrOpHdr;
          if (IfrCheckBox->Question.VarStoreId != IfrVarStore->VarStoreId) {
            break;
          }
          
          //
          // Get Offset by Question header
          //
          Offset = IfrCheckBox->Question.VarStoreInfo.VarOffset;
          Width  = (UINT16) sizeof (BOOLEAN);
          //
          // Check whether this question is in current block array.
          //
          if (!BlockArrayCheck (CurrentBlockArray, Offset, Width)) {
            //
            // This question is not in the current configuration string. Skip it.
            //
            break;
          }
          //
          // Check this var question is in the var storage 
          //
          if ((Offset + Width) > IfrVarStore->Size) {
            //
            // This question exceeds the var store size. 
            //
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }

          //
          // Boolean type, only 1 and 0 is valid.
          //
          if (*(VarBuffer + Offset) > 1) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;            
          }
          
          break;
        case EFI_IFR_STRING_OP:
          //
          // Check current string length is less than maxsize
          //

          //
          // CheckBox question is not in IFR Form. This IFR form is not valid. 
          //
          if (IfrVarStore == NULL) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }

          //
          // Check whether this question is for the requested varstore.
          //
          IfrString = (EFI_IFR_STRING *) IfrOpHdr;
          if (IfrString->Question.VarStoreId != IfrVarStore->VarStoreId) {
            break;
          }
          
          //
          // Get Offset/Width by Question header and OneOf Flags
          //
          Offset = IfrString->Question.VarStoreInfo.VarOffset;
          Width  = (UINT16) (IfrString->MaxSize * sizeof (UINT16));
          //
          // Check whether this question is in current block array.
          //
          if (!BlockArrayCheck (CurrentBlockArray, Offset, Width)) {
            //
            // This question is not in the current configuration string. Skip it.
            //
            break;
          }
          //
          // Check this var question is in the var storage 
          //
          if ((Offset + Width) > IfrVarStore->Size) {
            //
            // This question exceeds the var store size. 
            //
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }
          
          //
          // Check current string length is less than maxsize
          //
          if (StrSize ((CHAR16 *) (VarBuffer + Offset)) > Width) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;            
          }
          break;
        case EFI_IFR_ONE_OF_OPTION_OP:
          //
          // Opcode Scope is zero. This one of option is not to be checked. 
          //
          if (VarBlockData.Scope == 0) {
            break;
          }

          //
          // Only check for OneOf and OrderList opcode
          //
          IfrOneOfOption = (EFI_IFR_ONE_OF_OPTION *) IfrOpHdr;
          if (VarBlockData.OpCode == EFI_IFR_ONE_OF_OP) {
            //
            // Check current value is the value of one of option.
            //
            if (VarValue == IfrOneOfOption->Value.u64) {
              //
              // The value is one of option value.
              // Set OpCode to Zero, don't need check again.
              //
              VarBlockData.OpCode = 0;
            }
          }

          break;
        case EFI_IFR_END_OP:
          //
          // Decrease opcode scope for the validated opcode
          //
          if (VarBlockData.Scope > 0) {
            VarBlockData.Scope --;
          }

          //
          // OneOf value doesn't belong to one of option value. 
          //
          if ((VarBlockData.Scope == 0) && (VarBlockData.OpCode == EFI_IFR_ONE_OF_OP)) {
            Status = EFI_INVALID_PARAMETER;
            goto Done;
          }
          break;
        default:
          //
          // Increase Scope for the validated opcode
          //
          if (VarBlockData.Scope > 0) {
            VarBlockData.Scope = (UINT8) (VarBlockData.Scope + IfrOpHdr->Scope);
          }
          break;
        }
        //
        // Go to the next opcode
        //
        IfrOffset += IfrOpHdr->Length;
      }
      //
      // Only one form is in a package list.
      //
      break;
    }
    
    //
    // Go to next package.
    //
    PackageOffset += PacakgeHeader.Length;      
  }

Done:
  if (VarBuffer != NULL) {
    FreePool (VarBuffer);
  }
  
  if (CurrentBlockArray != NULL) {
    //
    // Free Link Array CurrentBlockArray
    //
    while (!IsListEmpty (&CurrentBlockArray->Entry)) {
      BlockData = BASE_CR (CurrentBlockArray->Entry.ForwardLink, IFR_BLOCK_DATA, Entry);
      RemoveEntryList (&BlockData->Entry);
      FreePool (BlockData);
    }
    FreePool (CurrentBlockArray);    
  }

  return Status;
}

/**
  This function parses the input ConfigRequest string and its matched IFR code
  string for setting default value and validating current setting.

  1. For setting default action, Reset the default value specified by DefaultId 
  to the driver configuration got by Request string.
  2. For validating current setting, Validate the current configuration 
  by parsing HII form IFR opcode.

  NULL request string support depends on the ExportConfig interface of
  HiiConfigRouting protocol in UEFI specification.
  
  @param Request    A null-terminated Unicode string in 
                    <MultiConfigRequest> format. It can be NULL.
                    If it is NULL, all current configuration for the
                    entirety of the current HII database will be validated.
                    If it is NULL, all configuration for the
                    entirety of the current HII database will be reset.
  @param DefaultId  Specifies the type of defaults to retrieve only for setting default action.
  @param ActionType Action supports setting defaults and validate current setting.
  
  @retval TURE    Action runs successfully.
  @retval FALSE   Action is not valid or Action can't be executed successfully..
**/
BOOLEAN
EFIAPI
InternalHiiIfrValueAction (
  IN CONST EFI_STRING Request,  OPTIONAL
  IN UINT16           DefaultId,
  IN UINT8            ActionType
  )
{
  EFI_STRING     ConfigAltResp;
  EFI_STRING     ConfigAltHdr;
  EFI_STRING     ConfigResp;
  EFI_STRING     Progress;
  EFI_STRING     StringPtr;
  EFI_STRING     StringHdr;
  EFI_STATUS     Status;
  EFI_HANDLE     DriverHandle;
  EFI_HANDLE     TempDriverHandle;
  EFI_HII_HANDLE *HiiHandleBuffer;
  EFI_HII_HANDLE HiiHandle;
  UINT32         Index;
  EFI_GUID       *VarGuid;
  EFI_STRING     VarName;

  UINT8                        *PackageData;
  EFI_HII_PACKAGE_LIST_HEADER  *HiiPackageList;
  UINTN                        PackageListLength;
  EFI_DEVICE_PATH_PROTOCOL     *DevicePath;
  EFI_DEVICE_PATH_PROTOCOL     *TempDevicePath;
  
  ConfigAltResp = NULL;
  ConfigResp    = NULL;
  VarGuid       = NULL;
  VarName       = NULL;
  DevicePath    = NULL;
  ConfigAltHdr  = NULL;
  HiiHandleBuffer  = NULL;
  Index            = 0;
  TempDriverHandle = NULL;
  HiiHandle        = NULL;
  PackageData      = NULL;
  HiiPackageList   = NULL;
  
  //
  // Only support set default and validate setting action.
  //
  if ((ActionType != ACTION_SET_DEFAUTL_VALUE) && (ActionType != ACTION_VALIDATE_SETTING)) {
    return FALSE;
  }

  //
  // Get the full requested value and deault value string.
  //
  if (Request != NULL) {
    Status = gHiiConfigRouting->ExtractConfig (
                                  gHiiConfigRouting,
                                  Request,
                                  &Progress,
                                  &ConfigAltResp
                                );
  } else {
    Status = gHiiConfigRouting->ExportConfig (
                                  gHiiConfigRouting,
                                  &ConfigAltResp
                                );
  }
  
  if (EFI_ERROR (Status)) {
    return FALSE;
  }
  
  StringPtr = ConfigAltResp;
  
  while (StringPtr != L'\0') {
    //
    // 1. Find <ConfigHdr> GUID=...&NAME=...&PATH=...
    //
    StringHdr = StringPtr;

    //
    // Get Guid value
    //
    if (StrnCmp (StringPtr, L"GUID=", StrLen (L"GUID=")) != 0) {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
    StringPtr += StrLen (L"GUID=");
    Status = InternalHiiGetBufferFromString (StringPtr, GUID_CONFIG_STRING_TYPE, (UINT8 **) &VarGuid);
    if (EFI_ERROR (Status)) {
      goto Done;
    }

    //
    // Get Name value VarName
    //
    while (*StringPtr != L'\0' && StrnCmp (StringPtr, L"&NAME=", StrLen (L"&NAME=")) != 0) {
      StringPtr++;
    }
    if (*StringPtr == L'\0') {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
    StringPtr += StrLen (L"&NAME=");
    Status = InternalHiiGetBufferFromString (StringPtr, NAME_CONFIG_STRING_TYPE, (UINT8 **) &VarName);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    
    //
    // Get Path value DevicePath
    //
    while (*StringPtr != L'\0' && StrnCmp (StringPtr, L"&PATH=", StrLen (L"&PATH=")) != 0) {
      StringPtr++;
    }
    if (*StringPtr == L'\0') {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
    StringPtr += StrLen (L"&PATH=");
    Status = InternalHiiGetBufferFromString (StringPtr, PATH_CONFIG_STRING_TYPE, (UINT8 **) &DevicePath);
    if (EFI_ERROR (Status)) {
      goto Done;
    }

    //
    // Get the Driver handle by the got device path.
    //
    TempDevicePath = DevicePath;
    Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &TempDevicePath, &DriverHandle);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    
    //
    // Find the matched Hii Handle for the found Driver handle
    //
    HiiHandleBuffer = HiiGetHiiHandles (NULL);
    if (HiiHandleBuffer == NULL) {
      Status = EFI_NOT_FOUND;
      goto Done;
    }

    for (Index = 0; HiiHandleBuffer[Index] != NULL; Index ++) {
      gHiiDatabase->GetPackageListHandle (gHiiDatabase, HiiHandleBuffer[Index], &TempDriverHandle);
      if (TempDriverHandle == DriverHandle) {
        break;
      }
    }

    HiiHandle = HiiHandleBuffer[Index];
    FreePool (HiiHandleBuffer);

    if (HiiHandle == NULL) {
      //
      // This request string has no its Hii package.
      // Its default value and validating can't execute by parsing IFR data.
      // Directly jump into the next ConfigAltResp string for another pair Guid, Name, and Path.   
      //
	    Status = EFI_SUCCESS;
      goto NextConfigAltResp;
    }

    //
    // 2. Get HiiPackage by HiiHandle
    //
    PackageListLength  = 0;
    HiiPackageList     = NULL;
    Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, HiiHandle, &PackageListLength, HiiPackageList);
  
    //
    // The return status should always be EFI_BUFFER_TOO_SMALL as input buffer's size is 0.
    //
    if (Status != EFI_BUFFER_TOO_SMALL) {
      Status = EFI_INVALID_PARAMETER;
      goto Done;
    }
  
    HiiPackageList = AllocatePool (PackageListLength);
    if (HiiPackageList == NULL) {
      Status = EFI_OUT_OF_RESOURCES;
      goto Done;
    }
  
    //
    // Get PackageList on HiiHandle
    //
    Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, HiiHandle, &PackageListLength, HiiPackageList);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    
    //
    // 3. Call ConfigRouting GetAltCfg(ConfigRoute, <ConfigResponse>, Guid, Name, DevicePath, AltCfgId, AltCfgResp)
    //    Get the default configuration string according to the default ID.
    //
    Status = gHiiConfigRouting->GetAltConfig (
                                  gHiiConfigRouting,
                                  ConfigAltResp,
                                  VarGuid,
                                  VarName,
                                  DevicePath,
                                  (ActionType == ACTION_SET_DEFAUTL_VALUE) ? &DefaultId:NULL,  // it can be NULL to get the current setting.
                                  &ConfigResp
                                );
    
    //
    // The required setting can't be found. So, it is not required to be validated and set.
    //
    if (EFI_ERROR (Status)) {
      Status = EFI_SUCCESS;
      goto NextConfigAltResp;
    }
    //
    // Only the ConfigHdr is found. Not any block data is found. No data is required to be validated and set.
    //
    if (StrStr (ConfigResp, L"&OFFSET=") == NULL) {
      goto NextConfigAltResp;
    }
    
    //
    // 4. Set the default configuration information or Validate current setting by parse IFR code.
    //    Current Setting is in ConfigResp, will be set into buffer, then check it again.
    //
    if (ActionType == ACTION_SET_DEFAUTL_VALUE) {
      //
      // Set the default configuration information.
      //
      Status = gHiiConfigRouting->RouteConfig (gHiiConfigRouting, ConfigResp, &Progress);
    } else {
      //
      // Current Setting is in ConfigResp, will be set into buffer, then check it again.
      //
      Status = InternalHiiValidateCurrentSetting (ConfigResp, HiiPackageList, PackageListLength, VarGuid, VarName);
    }

    if (EFI_ERROR (Status)) {
      goto Done;
    }

NextConfigAltResp:
    //
    // Free the allocated pacakge buffer and the got ConfigResp string.
    //
    if (HiiPackageList != NULL) {
      FreePool (HiiPackageList);
      HiiPackageList = NULL;
    }
    
  	if (ConfigResp != NULL) {
  	  FreePool (ConfigResp);
  	  ConfigResp = NULL;
  	}

    //
    // Free the allocated buffer.
    //
    FreePool (VarGuid);
    VarGuid = NULL;
  
    FreePool (VarName);
    VarName = NULL;
  
    FreePool (DevicePath);
    DevicePath = NULL;

    //
    // 5. Jump to next ConfigAltResp for another Guid, Name, Path.
    //

    //
    // Get and Skip ConfigHdr
    //
    while (*StringPtr != L'\0' && *StringPtr != L'&') {
      StringPtr++;
    }
    if (*StringPtr == L'\0') {
      break;
    }
        
    //
    // Construct ConfigAltHdr string  "&<ConfigHdr>&ALTCFG=\0" 
    //                               | 1 | StrLen (ConfigHdr) | 8 | 1 |
    //
    ConfigAltHdr = AllocateZeroPool ((1 + StringPtr - StringHdr + 8 + 1) * sizeof (CHAR16));
    if (ConfigAltHdr == NULL) {
      Status = EFI_OUT_OF_RESOURCES;
      goto Done;
    }
    StrCpy (ConfigAltHdr, L"&");
    StrnCat (ConfigAltHdr, StringHdr, StringPtr - StringHdr);
    StrCat (ConfigAltHdr, L"&ALTCFG=");
    
    //
    // Skip all AltResp (AltConfigHdr ConfigBody) for the same ConfigHdr
    //
    while ((StringHdr = StrStr (StringPtr, ConfigAltHdr)) != NULL) {
      StringPtr = StringHdr + StrLen (ConfigAltHdr);
      if (*StringPtr == L'\0') {
        break;
      }
    }
    
    //
    // Free the allocated ConfigAltHdr string
    //
    FreePool (ConfigAltHdr);
    if (*StringPtr == L'\0') {
      break;
    }
    
    //
    // Find &GUID as the next ConfigHdr
    //
    StringPtr = StrStr (StringPtr, L"&GUID");
    if (StringPtr == NULL) {
      break;
    }

    //
    // Skip char '&'
    //
    StringPtr ++;
  }
  
Done:
  if (VarGuid != NULL) {
    FreePool (VarGuid);
  }

  if (VarName != NULL) {
    FreePool (VarName);
  }

  if (DevicePath != NULL) {
    FreePool (DevicePath);
  }

  if (ConfigResp != NULL) {
    FreePool (ConfigResp);
  }

  if (ConfigAltResp != NULL) {
    FreePool (ConfigAltResp);
  }
 
  if (HiiPackageList != NULL) {
    FreePool (HiiPackageList);
  }
  
  if (EFI_ERROR (Status)) {
    return FALSE;
  }

  return TRUE;
}

/**
  Validate the current configuration by parsing HII form IFR opcode.

  NULL request string support depends on the ExportConfig interface of
  HiiConfigRouting protocol in UEFI specification.
  
  @param  Request   A null-terminated Unicode string in 
                    <MultiConfigRequest> format. It can be NULL.
                    If it is NULL, all current configuration for the
                    entirety of the current HII database will be validated.
  
  @retval TRUE    Current configuration is valid.
  @retval FALSE   Current configuration is invalid.
**/
BOOLEAN
EFIAPI                               
HiiValidateSettings (
  IN CONST EFI_STRING Request  OPTIONAL
  )
{
  return InternalHiiIfrValueAction (Request, 0, ACTION_VALIDATE_SETTING);
}

/**
  Reset the default value specified by DefaultId to the driver
  configuration got by Request string. 

  NULL request string support depends on the ExportConfig interface of
  HiiConfigRouting protocol in UEFI specification.
  
  @param Request    A null-terminated Unicode string in 
                    <MultiConfigRequest> format. It can be NULL.
                    If it is NULL, all configuration for the
                    entirety of the current HII database will be reset.
  @param DefaultId  Specifies the type of defaults to retrieve.
  
  @retval TURE    The default value is set successfully.
  @retval FALSE   The default value can't be found and set.
**/
BOOLEAN
EFIAPI
HiiSetToDefaults (
  IN CONST EFI_STRING Request,  OPTIONAL
  IN UINT16        DefaultId
  )
{
  return InternalHiiIfrValueAction (Request, DefaultId, ACTION_SET_DEFAUTL_VALUE);
}

/**
  Determines if two values in config strings match.

  Compares the substring between StartSearchString and StopSearchString in 
  FirstString to the substring between StartSearchString and StopSearchString 
  in SecondString.  If the two substrings match, then TRUE is returned.  If the
  two substrings do not match, then FALSE is returned.

  If FirstString is NULL, then ASSERT().
  If SecondString is NULL, then ASSERT().
  If StartSearchString is NULL, then ASSERT().
  If StopSearchString is NULL, then ASSERT().

  @param FirstString        Pointer to the first Null-terminated Unicode string.
  @param SecondString       Pointer to the second Null-terminated Unicode string.
  @param StartSearchString  Pointer to the Null-terminated Unicode string that 
                            marks the start of the value string to compare.
  @param StopSearchString   Pointer to the Null-terminated Unicode string that 
                            marks the end of the value string to compare.

  @retval FALSE             StartSearchString is not present in FirstString. 
  @retval FALSE             StartSearchString is not present in SecondString.
  @retval FALSE             StopSearchString is not present in FirstString. 
  @retval FALSE             StopSearchString is not present in SecondString.
  @retval FALSE             The length of the substring in FirstString is not the 
                            same length as the substring in SecondString.
  @retval FALSE             The value string in FirstString does not matche the 
                            value string in SecondString.
  @retval TRUE              The value string in FirstString matches the value 
                            string in SecondString.

**/
BOOLEAN
EFIAPI
InternalHiiCompareSubString (
  IN CHAR16  *FirstString,
  IN CHAR16  *SecondString,
  IN CHAR16  *StartSearchString,
  IN CHAR16  *StopSearchString
  )
{
  CHAR16  *EndFirstString;
  CHAR16  *EndSecondString;

  ASSERT (FirstString != NULL);
  ASSERT (SecondString != NULL);
  ASSERT (StartSearchString != NULL);
  ASSERT (StopSearchString != NULL);

  FirstString = StrStr (FirstString, StartSearchString);
  if (FirstString == NULL) {
    return FALSE;
  }

  SecondString = StrStr (SecondString, StartSearchString);
  if (SecondString == NULL) {
    return FALSE;
  }

  EndFirstString = StrStr (FirstString, StopSearchString);
  if (EndFirstString == NULL) {
    return FALSE;
  }

  EndSecondString = StrStr (SecondString, StopSearchString);
  if (EndSecondString == NULL) {
    return FALSE;
  }

  if ((EndFirstString - FirstString) != (EndSecondString - SecondString)) {
    return FALSE;
  }

  return (BOOLEAN)(StrnCmp (FirstString, SecondString, EndFirstString - FirstString) == 0);
}

/**
  Determines if the routing data specified by GUID and NAME match a <ConfigHdr>.

  If ConfigHdr is NULL, then ASSERT().

  @param[in] ConfigHdr  Either <ConfigRequest> or <ConfigResp>.
  @param[in] Guid       GUID of the storage.
  @param[in] Name       NAME of the storage.

  @retval TRUE   Routing information matches <ConfigHdr>.
  @retval FALSE  Routing information does not match <ConfigHdr>.

**/
BOOLEAN
EFIAPI
HiiIsConfigHdrMatch (
  IN CONST EFI_STRING  ConfigHdr,
  IN CONST EFI_GUID    *Guid,     OPTIONAL
  IN CONST CHAR16      *Name      OPTIONAL
  )
{
  EFI_STRING  CompareConfigHdr;
  BOOLEAN     Result;

  ASSERT (ConfigHdr != NULL);

  //
  // Use Guid and Name to generate a <ConfigHdr> string
  //
  CompareConfigHdr = HiiConstructConfigHdr (Guid, Name, NULL);
  if (CompareConfigHdr == NULL) {
    return FALSE;
  }

  Result = TRUE;
  if (Guid != NULL) {
    //
    // Compare GUID value strings
    //
    Result = InternalHiiCompareSubString (ConfigHdr, CompareConfigHdr, L"GUID=", L"&NAME=");
  }

  if (Result && Name != NULL) {
    //
    // Compare NAME value strings
    //
    Result = InternalHiiCompareSubString (ConfigHdr, CompareConfigHdr, L"&NAME=", L"&PATH=");
  }

  //
  // Free the <ConfigHdr> string
  //
  FreePool (CompareConfigHdr);

  return Result;
}

/**
  Retrieves uncommitted data from the Form Browser and converts it to a binary
  buffer.

  @param[in]  VariableGuid  Pointer to an EFI_GUID structure.  This is an optional 
                            parameter that may be NULL.
  @param[in]  VariableName  Pointer to a Null-terminated Unicode string.  This 
                            is an optional parameter that may be NULL.
  @param[in]  BufferSize    Length in bytes of buffer to hold retrieved data. 
  @param[out] Buffer        Buffer of data to be updated.

  @retval FALSE  The uncommitted data could not be retrieved.
  @retval TRUE   The uncommitted data was retrieved.

**/
BOOLEAN
EFIAPI
HiiGetBrowserData (
  IN CONST EFI_GUID  *VariableGuid,  OPTIONAL
  IN CONST CHAR16    *VariableName,  OPTIONAL
  IN UINTN           BufferSize,
  OUT UINT8          *Buffer
  )
{
  EFI_STRING  ResultsData;
  UINTN       Size;
  EFI_STRING  ConfigResp;
  EFI_STATUS  Status;
  CHAR16      *Progress;

  //
  // Retrieve the results data from the Browser Callback
  //
  ResultsData = InternalHiiBrowserCallback (VariableGuid, VariableName, NULL);
  if (ResultsData == NULL) {
    return FALSE;
  }

  //
  // Construct <ConfigResp> mConfigHdrTemplate L'&' ResultsData L'\0'
  //
  Size = (StrLen (mConfigHdrTemplate) + 1) * sizeof (CHAR16);
  Size = Size + (StrLen (ResultsData) + 1) * sizeof (CHAR16);
  ConfigResp = AllocateZeroPool (Size);
  UnicodeSPrint (ConfigResp, Size, L"%s&%s", mConfigHdrTemplate, ResultsData);
  
  //
  // Free the allocated buffer
  //
  FreePool (ResultsData);
  if (ConfigResp == NULL) {
    return FALSE;
  }

  //
  // Convert <ConfigResp> to a buffer
  //
  Status = gHiiConfigRouting->ConfigToBlock (
                                gHiiConfigRouting,
                                ConfigResp,
                                Buffer,
                                &BufferSize,
                                &Progress
                                );
  //
  // Free the allocated buffer
  //
  FreePool (ConfigResp);

  if (EFI_ERROR (Status)) {
    return FALSE;
  }

  return TRUE;
}

/**
  Updates uncommitted data in the Form Browser.

  If Buffer is NULL, then ASSERT().

  @param[in]  VariableGuid    Pointer to an EFI_GUID structure.  This is an optional
                              parameter that may be NULL.
  @param[in]  VariableName    Pointer to a Null-terminated Unicode string.  This
                              is an optional parameter that may be NULL.
  @param[in]  BufferSize      Length, in bytes, of Buffer.
  @param[in]  Buffer          Buffer of data to commit.
  @param[in]  RequestElement  An optional field to specify which part of the
                              buffer data will be send back to Browser. If NULL,
                              the whole buffer of data will be committed to
                              Browser. 
                              <RequestElement> ::= &OFFSET=<Number>&WIDTH=<Number>*

  @retval FALSE  The uncommitted data could not be updated.
  @retval TRUE   The uncommitted data was updated.

**/
BOOLEAN
EFIAPI
HiiSetBrowserData (
  IN CONST EFI_GUID  *VariableGuid, OPTIONAL
  IN CONST CHAR16    *VariableName, OPTIONAL
  IN UINTN           BufferSize,
  IN CONST UINT8     *Buffer,
  IN CONST CHAR16    *RequestElement  OPTIONAL
  )
{
  UINTN       Size;
  EFI_STRING  ConfigRequest;
  EFI_STRING  ConfigResp;
  EFI_STRING  ResultsData;

  ASSERT (Buffer != NULL);

  //
  // Construct <ConfigRequest>
  //
  if (RequestElement == NULL) {
    //
    // Allocate and fill a buffer large enough to hold the <ConfigHdr> template 
    // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator
    //
    Size = (StrLen (mConfigHdrTemplate) + 32 + 1) * sizeof (CHAR16);
    ConfigRequest = AllocateZeroPool (Size);
    UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", mConfigHdrTemplate, (UINT64)BufferSize);
  } else {
    //
    // Allocate and fill a buffer large enough to hold the <ConfigHdr> template 
    // followed by <RequestElement> followed by a Null-terminator
    //
    Size = StrLen (mConfigHdrTemplate) * sizeof (CHAR16);
    Size = Size + (StrLen (RequestElement) + 1) * sizeof (CHAR16);
    ConfigRequest = AllocateZeroPool (Size);
    UnicodeSPrint (ConfigRequest, Size, L"%s%s", mConfigHdrTemplate, RequestElement);
  }
  if (ConfigRequest == NULL) {
    return FALSE;
  }

  //
  // Convert <ConfigRequest> to <ConfigResp>
  //
  ConfigResp = InternalHiiBlockToConfig (ConfigRequest, Buffer, BufferSize);
  FreePool (ConfigRequest);
  if (ConfigResp == NULL) {
    return FALSE;
  }

  //
  // Set data in the uncommitted browser state information
  //
  ResultsData = InternalHiiBrowserCallback (VariableGuid, VariableName, ConfigResp + StrLen(mConfigHdrTemplate) + 1);
  FreePool (ConfigResp);

  return (BOOLEAN)(ResultsData != NULL);
}

/////////////////////////////////////////
/////////////////////////////////////////
/// IFR Functions
/////////////////////////////////////////
/////////////////////////////////////////

#define HII_LIB_OPCODE_ALLOCATION_SIZE  0x200

typedef struct {
  UINT8  *Buffer;
  UINTN  BufferSize;
  UINTN  Position;
} HII_LIB_OPCODE_BUFFER;

///
/// Lookup table that converts EFI_IFR_TYPE_X enum values to a width in bytes
///
GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT8 mHiiDefaultTypeToWidth[] = {
  1, // EFI_IFR_TYPE_NUM_SIZE_8
  2, // EFI_IFR_TYPE_NUM_SIZE_16
  4, // EFI_IFR_TYPE_NUM_SIZE_32
  8, // EFI_IFR_TYPE_NUM_SIZE_64
  1, // EFI_IFR_TYPE_BOOLEAN
  3, // EFI_IFR_TYPE_TIME
  4, // EFI_IFR_TYPE_DATE
  2  // EFI_IFR_TYPE_STRING
};

/**
  Allocates and returns a new OpCode Handle.  OpCode Handles must be freed with 
  HiiFreeOpCodeHandle().

  @retval NULL   There are not enough resources to allocate a new OpCode Handle.
  @retval Other  A new OpCode handle.

**/
VOID *
EFIAPI
HiiAllocateOpCodeHandle (
  VOID
  )
{
  HII_LIB_OPCODE_BUFFER  *OpCodeBuffer;

  OpCodeBuffer = (HII_LIB_OPCODE_BUFFER *)AllocatePool (sizeof (HII_LIB_OPCODE_BUFFER));
  if (OpCodeBuffer == NULL) {
    return NULL;
  }
  OpCodeBuffer->Buffer = (UINT8 *)AllocatePool (HII_LIB_OPCODE_ALLOCATION_SIZE);
  if (OpCodeBuffer->Buffer == NULL) {
    FreePool (OpCodeBuffer);
    return NULL;
  }
  OpCodeBuffer->BufferSize = HII_LIB_OPCODE_ALLOCATION_SIZE;
  OpCodeBuffer->Position = 0;
  return (VOID *)OpCodeBuffer;
}

/**
  Frees an OpCode Handle that was previously allocated with HiiAllocateOpCodeHandle().
  When an OpCode Handle is freed, all of the opcodes associated with the OpCode
  Handle are also freed.

  If OpCodeHandle is NULL, then ASSERT().

  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.

**/
VOID
EFIAPI
HiiFreeOpCodeHandle (
  VOID  *OpCodeHandle
  )
{
  HII_LIB_OPCODE_BUFFER  *OpCodeBuffer;

  ASSERT (OpCodeHandle != NULL);

  OpCodeBuffer = (HII_LIB_OPCODE_BUFFER *)OpCodeHandle;
  if (OpCodeBuffer->Buffer != NULL) {
    FreePool (OpCodeBuffer->Buffer);
  }
  FreePool (OpCodeBuffer);
}

/**
  Internal function gets the current position of opcode buffer.
  
  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.

  @return Current position of opcode buffer.
**/
UINTN
EFIAPI
InternalHiiOpCodeHandlePosition (
  IN VOID  *OpCodeHandle
  )
{
  return ((HII_LIB_OPCODE_BUFFER  *)OpCodeHandle)->Position;
}

/**
  Internal function gets the start pointer of opcode buffer.
  
  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.

  @return Pointer to the opcode buffer base.
**/
UINT8 *
EFIAPI
InternalHiiOpCodeHandleBuffer (
  IN VOID  *OpCodeHandle
  )
{
  return ((HII_LIB_OPCODE_BUFFER  *)OpCodeHandle)->Buffer;
}

/**
  Internal function reserves the enough buffer for current opcode.
  When the buffer is not enough, Opcode buffer will be extended.
  
  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.
  @param[in]  Size           Size of current opcode.

  @return Pointer to the current opcode.
**/
UINT8 *
EFIAPI
InternalHiiGrowOpCodeHandle (
  IN VOID   *OpCodeHandle,
  IN UINTN  Size
  )
{
  HII_LIB_OPCODE_BUFFER  *OpCodeBuffer;
  UINT8                  *Buffer;

  ASSERT (OpCodeHandle != NULL);

  OpCodeBuffer = (HII_LIB_OPCODE_BUFFER *)OpCodeHandle;
  if (OpCodeBuffer->Position + Size > OpCodeBuffer->BufferSize) {
    Buffer = ReallocatePool (
              OpCodeBuffer->BufferSize, 
              OpCodeBuffer->BufferSize + (Size + HII_LIB_OPCODE_ALLOCATION_SIZE),
              OpCodeBuffer->Buffer
              );
    if (Buffer == NULL) {
      return NULL;
    }
    OpCodeBuffer->Buffer = Buffer;
    OpCodeBuffer->BufferSize += (Size + HII_LIB_OPCODE_ALLOCATION_SIZE);
  }
  Buffer = OpCodeBuffer->Buffer + OpCodeBuffer->Position;
  OpCodeBuffer->Position += Size;
  return Buffer;
}

/**
  Internal function creates opcode based on the template opcode.
  
  @param[in]  OpCodeHandle    Handle to the buffer of opcodes.
  @param[in]  OpCodeTemplate  Pointer to the template buffer of opcode.
  @param[in]  OpCode          OpCode IFR value.
  @param[in]  OpCodeSize      Size of opcode.
  @param[in]  ExtensionSize   Size of extended opcode.
  @param[in]  Scope           Scope bit of opcode.

  @return Pointer to the current opcode with opcode data.
**/
UINT8 *
EFIAPI
InternalHiiCreateOpCodeExtended (
  IN VOID   *OpCodeHandle,
  IN VOID   *OpCodeTemplate,
  IN UINT8  OpCode,
  IN UINTN  OpCodeSize,
  IN UINTN  ExtensionSize,
  IN UINT8  Scope
  )
{
  EFI_IFR_OP_HEADER  *Header;
  UINT8              *Buffer;

  ASSERT (OpCodeTemplate != NULL);
  ASSERT ((OpCodeSize + ExtensionSize) <= 0x7F);

  Header = (EFI_IFR_OP_HEADER *)OpCodeTemplate;
  Header->OpCode = OpCode;
  Header->Scope  = Scope;
  Header->Length = (UINT8)(OpCodeSize + ExtensionSize);
  Buffer = InternalHiiGrowOpCodeHandle (OpCodeHandle, Header->Length);
  return (UINT8 *)CopyMem (Buffer, Header, OpCodeSize);
}

/**
  Internal function creates opcode based on the template opcode for the normal opcode.
  
  @param[in]  OpCodeHandle    Handle to the buffer of opcodes.
  @param[in]  OpCodeTemplate  Pointer to the template buffer of opcode.
  @param[in]  OpCode          OpCode IFR value.
  @param[in]  OpCodeSize      Size of opcode.

  @return Pointer to the current opcode with opcode data.
**/
UINT8 *
EFIAPI
InternalHiiCreateOpCode (
  IN VOID   *OpCodeHandle,
  IN VOID   *OpCodeTemplate,
  IN UINT8  OpCode,
  IN UINTN  OpCodeSize
  )
{
  return InternalHiiCreateOpCodeExtended (OpCodeHandle, OpCodeTemplate, OpCode, OpCodeSize, 0, 0);
}

/**
  Append raw opcodes to an OpCodeHandle.

  If OpCodeHandle is NULL, then ASSERT().
  If RawBuffer is NULL, then ASSERT();

  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.
  @param[in]  RawBuffer      Buffer of opcodes to append.
  @param[in]  RawBufferSize  The size, in bytes, of Buffer.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the appended opcodes.

**/
UINT8 *
EFIAPI
HiiCreateRawOpCodes (
  IN VOID   *OpCodeHandle,
  IN UINT8  *RawBuffer,
  IN UINTN  RawBufferSize
  )
{
  UINT8  *Buffer;

  ASSERT (RawBuffer != NULL);

  Buffer = InternalHiiGrowOpCodeHandle (OpCodeHandle, RawBufferSize);
  return (UINT8 *)CopyMem (Buffer, RawBuffer, RawBufferSize);
}

/**
  Append opcodes from one OpCode Handle to another OpCode handle.

  If OpCodeHandle is NULL, then ASSERT().
  If RawOpCodeHandle is NULL, then ASSERT();

  @param[in]  OpCodeHandle     Handle to the buffer of opcodes.
  @param[in]  RawOpCodeHandle  Handle to the buffer of opcodes.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the appended opcodes.

**/
UINT8 *
EFIAPI
InternalHiiAppendOpCodes (
  IN VOID  *OpCodeHandle,
  IN VOID  *RawOpCodeHandle
  )
{
  HII_LIB_OPCODE_BUFFER  *RawOpCodeBuffer;

  ASSERT (RawOpCodeHandle != NULL);

  RawOpCodeBuffer = (HII_LIB_OPCODE_BUFFER *)RawOpCodeHandle;
  return HiiCreateRawOpCodes (OpCodeHandle, RawOpCodeBuffer->Buffer, RawOpCodeBuffer->Position);
}

/**
  Create EFI_IFR_END_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateEndOpCode (
  IN VOID  *OpCodeHandle
  )
{
  EFI_IFR_END  OpCode;

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_END_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_ONE_OF_OPTION_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If Type is invalid, then ASSERT().
  If Flags is invalid, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  StringId      StringId for the option
  @param[in]  Flags         Flags for the option
  @param[in]  Type          Type for the option
  @param[in]  Value         Value for the option

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateOneOfOptionOpCode (
  IN VOID    *OpCodeHandle,
  IN UINT16  StringId,
  IN UINT8   Flags,
  IN UINT8   Type,
  IN UINT64  Value
  )
{
  EFI_IFR_ONE_OF_OPTION  OpCode;

  ASSERT (Type < EFI_IFR_TYPE_OTHER);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Option = StringId;
  OpCode.Flags  = (UINT8) (Flags & (EFI_IFR_OPTION_DEFAULT | EFI_IFR_OPTION_DEFAULT_MFG));
  OpCode.Type   = Type;
  CopyMem (&OpCode.Value, &Value, mHiiDefaultTypeToWidth[Type]);

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_ONE_OF_OPTION_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_DEFAULT_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If Type is invalid, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  DefaultId     DefaultId for the default
  @param[in]  Type          Type for the default
  @param[in]  Value         Value for the default

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateDefaultOpCode (
  IN VOID    *OpCodeHandle,
  IN UINT16  DefaultId,
  IN UINT8   Type,
  IN UINT64  Value
  )
{
  EFI_IFR_DEFAULT  OpCode;

  ASSERT (Type < EFI_IFR_TYPE_OTHER);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Type      = Type;
  OpCode.DefaultId = DefaultId;
  CopyMem (&OpCode.Value, &Value, mHiiDefaultTypeToWidth[Type]);

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_DEFAULT_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_GUID opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If Guid is NULL, then ASSERT().
  If OpCodeSize < sizeof (EFI_IFR_GUID), then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  Guid          Pointer to EFI_GUID of this guided opcode.
  @param[in]  GuidOpCode    Pointer to an EFI_IFR_GUID opcode.  This is an 
                            optional parameter that may be NULL.  If this
                            parameter is NULL, then the GUID extension 
                            region of the created opcode is filled with zeros.
                            If this parameter is not NULL, then the GUID 
                            extension region of GuidData will be copied to 
                            the GUID extension region of the created opcode.
  @param[in]  OpCodeSize    The size, in bytes, of created opcode.  This value 
                            must be >= sizeof(EFI_IFR_GUID).

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateGuidOpCode (
  IN VOID            *OpCodeHandle,
  IN CONST EFI_GUID  *Guid,
  IN CONST VOID      *GuidOpCode,    OPTIONAL
  IN UINTN           OpCodeSize
  )
{
  EFI_IFR_GUID  OpCode;
  EFI_IFR_GUID  *OpCodePointer;

  ASSERT (Guid != NULL);
  ASSERT (OpCodeSize >= sizeof (OpCode));

  ZeroMem (&OpCode, sizeof (OpCode));
  CopyGuid ((EFI_GUID *)(VOID *)&OpCode.Guid, Guid);

  OpCodePointer = (EFI_IFR_GUID *)InternalHiiCreateOpCodeExtended (
                                    OpCodeHandle, 
                                    &OpCode,
                                    EFI_IFR_GUID_OP,
                                    sizeof (OpCode),
                                    OpCodeSize - sizeof (OpCode),
                                    0
                                    );
  if (OpCodePointer != NULL && GuidOpCode != NULL) {
    CopyMem (OpCodePointer + 1, (EFI_IFR_GUID *)GuidOpCode + 1, OpCodeSize - sizeof (OpCode));
  }
  return (UINT8 *)OpCodePointer;
}

/**
  Create EFI_IFR_ACTION_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  QuestionId      Question ID
  @param[in]  Prompt          String ID for Prompt
  @param[in]  Help            String ID for Help
  @param[in]  QuestionFlags   Flags in Question Header
  @param[in]  QuestionConfig  String ID for configuration

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateActionOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN EFI_STRING_ID    QuestionConfig
  )
{
  EFI_IFR_ACTION  OpCode;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.QuestionId    = QuestionId;
  OpCode.Question.Header.Prompt = Prompt;
  OpCode.Question.Header.Help   = Help;
  OpCode.Question.Flags         = QuestionFlags;
  OpCode.QuestionConfig         = QuestionConfig;

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_ACTION_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_SUBTITLE_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in Flags, then ASSERT().
  If Scope > 1, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  Prompt      String ID for Prompt
  @param[in]  Help        String ID for Help
  @param[in]  Flags       Subtitle opcode flags
  @param[in]  Scope       1 if this opcpde is the beginning of a new scope.
                          0 if this opcode is within the current scope.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateSubTitleOpCode (
  IN VOID           *OpCodeHandle,
  IN EFI_STRING_ID  Prompt,
  IN EFI_STRING_ID  Help,
  IN UINT8          Flags,
  IN UINT8          Scope
  )
{
  EFI_IFR_SUBTITLE  OpCode;

  ASSERT (Scope <= 1);
  ASSERT ((Flags & (~(EFI_IFR_FLAGS_HORIZONTAL))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Statement.Prompt = Prompt;
  OpCode.Statement.Help   = Help;
  OpCode.Flags            = Flags;

  return InternalHiiCreateOpCodeExtended (
           OpCodeHandle, 
           &OpCode,
           EFI_IFR_SUBTITLE_OP, 
           sizeof (OpCode), 
           0, 
           Scope
           );
}

/**
  Create EFI_IFR_REF_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().

  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.
  @param[in]  FormId         Destination Form ID
  @param[in]  Prompt         String ID for Prompt
  @param[in]  Help           String ID for Help
  @param[in]  QuestionFlags  Flags in Question Header
  @param[in]  QuestionId     Question ID

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateGotoOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_FORM_ID      FormId,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN EFI_QUESTION_ID  QuestionId
  )
{
  EFI_IFR_REF  OpCode;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt = Prompt;
  OpCode.Question.Header.Help   = Help;
  OpCode.Question.QuestionId    = QuestionId;
  OpCode.Question.Flags         = QuestionFlags;
  OpCode.FormId                 = FormId;

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_REF_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_CHECKBOX_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in CheckBoxFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID
  @param[in]  VarOffset             Offset in Storage
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  CheckBoxFlags         Flags for checkbox opcode
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateCheckBoxOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,
  IN UINT16           VarOffset,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            CheckBoxFlags,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_CHECKBOX  OpCode;
  UINTN             Position;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.Flags                           = CheckBoxFlags;

  if (DefaultsOpCodeHandle == NULL) {
    return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_CHECKBOX_OP, sizeof (OpCode));
  }

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_CHECKBOX_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_NUMERIC_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in NumericFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID
  @param[in]  VarOffset             Offset in Storage
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  NumericFlags          Flags for numeric opcode
  @param[in]  Minimum               Numeric minimum value
  @param[in]  Maximum               Numeric maximum value
  @param[in]  Step                  Numeric step for edit
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateNumericOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,
  IN UINT16           VarOffset,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            NumericFlags,
  IN UINT64           Minimum,
  IN UINT64           Maximum,
  IN UINT64           Step,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_NUMERIC  OpCode;
  UINTN            Position;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.Flags                           = NumericFlags;

  switch (NumericFlags & EFI_IFR_NUMERIC_SIZE) {
  case EFI_IFR_NUMERIC_SIZE_1:
    OpCode.data.u8.MinValue = (UINT8)Minimum;
    OpCode.data.u8.MaxValue = (UINT8)Maximum;
    OpCode.data.u8.Step     = (UINT8)Step;
    break;

  case EFI_IFR_NUMERIC_SIZE_2:
    OpCode.data.u16.MinValue = (UINT16)Minimum;
    OpCode.data.u16.MaxValue = (UINT16)Maximum;
    OpCode.data.u16.Step     = (UINT16)Step;
    break;

  case EFI_IFR_NUMERIC_SIZE_4:
    OpCode.data.u32.MinValue = (UINT32)Minimum;
    OpCode.data.u32.MaxValue = (UINT32)Maximum;
    OpCode.data.u32.Step     = (UINT32)Step;
    break;

  case EFI_IFR_NUMERIC_SIZE_8:
    OpCode.data.u64.MinValue = Minimum;
    OpCode.data.u64.MaxValue = Maximum;
    OpCode.data.u64.Step     = Step;
    break;
  }

  if (DefaultsOpCodeHandle == NULL) {
    return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_NUMERIC_OP, sizeof (OpCode));
  }

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_NUMERIC_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_STRING_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in StringFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID
  @param[in]  VarOffset             Offset in Storage
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  StringFlags           Flags for string opcode
  @param[in]  MinSize               String minimum length
  @param[in]  MaxSize               String maximum length
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateStringOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,
  IN UINT16           VarOffset,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            StringFlags,
  IN UINT8            MinSize,
  IN UINT8            MaxSize,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_STRING  OpCode;
  UINTN           Position;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.MinSize                         = MinSize;
  OpCode.MaxSize                         = MaxSize;
  OpCode.Flags                           = (UINT8) (StringFlags & EFI_IFR_STRING_MULTI_LINE);

  if (DefaultsOpCodeHandle == NULL) {
    return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_STRING_OP, sizeof (OpCode));
  }

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_STRING_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_ONE_OF_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in OneOfFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID
  @param[in]  VarOffset             Offset in Storage
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  OneOfFlags            Flags for oneof opcode
  @param[in]  OptionsOpCodeHandle   Handle for a buffer of ONE_OF_OPTION opcodes.
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateOneOfOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,
  IN UINT16           VarOffset,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            OneOfFlags,
  IN VOID             *OptionsOpCodeHandle,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_ONE_OF  OpCode;
  UINTN           Position;

  ASSERT (OptionsOpCodeHandle != NULL);
  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED | EFI_IFR_FLAG_OPTIONS_ONLY))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.Flags                           = OneOfFlags;

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_ONE_OF_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, OptionsOpCodeHandle);
  if (DefaultsOpCodeHandle != NULL) {
    InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  }
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_ORDERED_LIST_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in OrderedListFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID
  @param[in]  VarOffset             Offset in Storage
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  OrderedListFlags      Flags for ordered list opcode
  @param[in]  DataType              Type for option value
  @param[in]  MaxContainers         Maximum count for options in this ordered list
  @param[in]  OptionsOpCodeHandle   Handle for a buffer of ONE_OF_OPTION opcodes.
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateOrderedListOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,
  IN UINT16           VarOffset,
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            OrderedListFlags,
  IN UINT8            DataType,
  IN UINT8            MaxContainers,
  IN VOID             *OptionsOpCodeHandle,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_ORDERED_LIST  OpCode;
  UINTN                 Position;

  ASSERT (OptionsOpCodeHandle != NULL);
  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED | EFI_IFR_FLAG_OPTIONS_ONLY))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.MaxContainers                   = MaxContainers;
  OpCode.Flags                           = OrderedListFlags;

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_ORDERED_LIST_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, OptionsOpCodeHandle);
  if (DefaultsOpCodeHandle != NULL) {
    InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  }
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_TEXT_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().

  @param[in]  OpCodeHandle  Handle to the buffer of opcodes.
  @param[in]  Prompt        String ID for Prompt.
  @param[in]  Help          String ID for Help.
  @param[in]  TextTwo       String ID for TextTwo.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateTextOpCode (
  IN VOID           *OpCodeHandle,
  IN EFI_STRING_ID  Prompt,
  IN EFI_STRING_ID  Help,
  IN EFI_STRING_ID  TextTwo
  )
{
  EFI_IFR_TEXT  OpCode;

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Statement.Prompt = Prompt;
  OpCode.Statement.Help   = Help;
  OpCode.TextTwo          = TextTwo;

  return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_TEXT_OP, sizeof (OpCode));
}

/**
  Create EFI_IFR_DATE_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in DateFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID, optional. If DateFlags is not
                                    QF_DATE_STORAGE_NORMAL, this parameter is ignored.
  @param[in]  VarOffset             Offset in Storage, optional. If DateFlags is not
                                    QF_DATE_STORAGE_NORMAL, this parameter is ignored.
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  DateFlags             Flags for date opcode
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateDateOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,   OPTIONAL
  IN UINT16           VarOffset,    OPTIONAL
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            DateFlags,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_DATE    OpCode;
  UINTN           Position;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);
  ASSERT ((DateFlags & (~(EFI_QF_DATE_YEAR_SUPPRESS | EFI_QF_DATE_MONTH_SUPPRESS | EFI_QF_DATE_DAY_SUPPRESS | EFI_QF_DATE_STORAGE))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.Flags                           = DateFlags;

  if (DefaultsOpCodeHandle == NULL) {
    return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_DATE_OP, sizeof (OpCode));
  }

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_DATE_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  Create EFI_IFR_TIME_OP opcode.

  If OpCodeHandle is NULL, then ASSERT().
  If any reserved bits are set in QuestionFlags, then ASSERT().
  If any reserved bits are set in TimeFlags, then ASSERT().

  @param[in]  OpCodeHandle          Handle to the buffer of opcodes.
  @param[in]  QuestionId            Question ID
  @param[in]  VarStoreId            Storage ID, optional. If TimeFlags is not
                                    QF_TIME_STORAGE_NORMAL, this parameter is ignored.
  @param[in]  VarOffset             Offset in Storage, optional. If TimeFlags is not
                                    QF_TIME_STORAGE_NORMAL, this parameter is ignored.
  @param[in]  Prompt                String ID for Prompt
  @param[in]  Help                  String ID for Help
  @param[in]  QuestionFlags         Flags in Question Header
  @param[in]  TimeFlags             Flags for time opcode
  @param[in]  DefaultsOpCodeHandle  Handle for a buffer of DEFAULT opcodes.  This
                                    is an optional parameter that may be NULL.

  @retval NULL   There is not enough space left in Buffer to add the opcode.
  @retval Other  A pointer to the created opcode.

**/
UINT8 *
EFIAPI
HiiCreateTimeOpCode (
  IN VOID             *OpCodeHandle,
  IN EFI_QUESTION_ID  QuestionId,
  IN EFI_VARSTORE_ID  VarStoreId,   OPTIONAL
  IN UINT16           VarOffset,    OPTIONAL
  IN EFI_STRING_ID    Prompt,
  IN EFI_STRING_ID    Help,
  IN UINT8            QuestionFlags,
  IN UINT8            TimeFlags,
  IN VOID             *DefaultsOpCodeHandle  OPTIONAL
  )
{
  EFI_IFR_TIME    OpCode;
  UINTN           Position;

  ASSERT ((QuestionFlags & (~(EFI_IFR_FLAG_READ_ONLY | EFI_IFR_FLAG_CALLBACK | EFI_IFR_FLAG_RESET_REQUIRED))) == 0);
  ASSERT ((TimeFlags & (~(QF_TIME_HOUR_SUPPRESS | QF_TIME_MINUTE_SUPPRESS | QF_TIME_SECOND_SUPPRESS | QF_TIME_STORAGE))) == 0);

  ZeroMem (&OpCode, sizeof (OpCode));
  OpCode.Question.Header.Prompt          = Prompt;
  OpCode.Question.Header.Help            = Help;
  OpCode.Question.QuestionId             = QuestionId;
  OpCode.Question.VarStoreId             = VarStoreId;
  OpCode.Question.VarStoreInfo.VarOffset = VarOffset;
  OpCode.Question.Flags                  = QuestionFlags;
  OpCode.Flags                           = TimeFlags;

  if (DefaultsOpCodeHandle == NULL) {
    return InternalHiiCreateOpCode (OpCodeHandle, &OpCode, EFI_IFR_TIME_OP, sizeof (OpCode));
  }

  Position = InternalHiiOpCodeHandlePosition (OpCodeHandle);
  InternalHiiCreateOpCodeExtended (OpCodeHandle, &OpCode, EFI_IFR_TIME_OP, sizeof (OpCode), 0, 1);
  InternalHiiAppendOpCodes (OpCodeHandle, DefaultsOpCodeHandle);
  HiiCreateEndOpCode (OpCodeHandle);
  return InternalHiiOpCodeHandleBuffer (OpCodeHandle) + Position;
}

/**
  This is the internal worker function to update the data in
  a form specified by FormSetGuid, FormId and Label.

  @param[in] FormSetGuid       The optional Formset GUID.
  @param[in] FormId            The Form ID.
  @param[in] Package           The package header.
  @param[in] OpCodeBufferStart An OpCode buffer that contains the set of IFR 
                               opcodes to be inserted or replaced in the form.
  @param[in] OpCodeBufferEnd   An OpCcode buffer that contains the IFR opcode
                               that marks the end of a replace operation in the form.
  @param[out] TempPackage      The resultant package.

  @retval EFI_SUCCESS    The function completes successfully.
  @retval EFI_NOT_FOUND  The updated opcode or endopcode is not found.

**/
EFI_STATUS
EFIAPI
InternalHiiUpdateFormPackageData (
  IN  EFI_GUID               *FormSetGuid, OPTIONAL
  IN  EFI_FORM_ID            FormId,
  IN  EFI_HII_PACKAGE_HEADER *Package,
  IN  HII_LIB_OPCODE_BUFFER  *OpCodeBufferStart,
  IN  HII_LIB_OPCODE_BUFFER  *OpCodeBufferEnd,    OPTIONAL
  OUT EFI_HII_PACKAGE_HEADER *TempPackage
  )
{
  UINTN                     AddSize;
  UINT8                     *BufferPos;
  EFI_HII_PACKAGE_HEADER    PackageHeader;
  UINTN                     Offset;
  EFI_IFR_OP_HEADER         *IfrOpHdr;
  EFI_IFR_OP_HEADER         *UpdateIfrOpHdr;
  BOOLEAN                   GetFormSet;
  BOOLEAN                   GetForm;
  BOOLEAN                   Updated;
  UINTN                     UpdatePackageLength;

  CopyMem (TempPackage, Package, sizeof (EFI_HII_PACKAGE_HEADER));
  UpdatePackageLength = sizeof (EFI_HII_PACKAGE_HEADER);
  BufferPos           = (UINT8 *) (TempPackage + 1);

  CopyMem (&PackageHeader, Package, sizeof (EFI_HII_PACKAGE_HEADER));
  IfrOpHdr   = (EFI_IFR_OP_HEADER *)((UINT8 *) Package + sizeof (EFI_HII_PACKAGE_HEADER));
  Offset     = sizeof (EFI_HII_PACKAGE_HEADER);
  GetFormSet = (BOOLEAN) ((FormSetGuid == NULL) ? TRUE : FALSE);
  GetForm    = FALSE;
  Updated    = FALSE;

  while (Offset < PackageHeader.Length) {
    CopyMem (BufferPos, IfrOpHdr, IfrOpHdr->Length);
    BufferPos           += IfrOpHdr->Length;
    UpdatePackageLength += IfrOpHdr->Length;
    
    //
    // Find the matched FormSet and Form
    //
    if ((IfrOpHdr->OpCode == EFI_IFR_FORM_SET_OP) && (FormSetGuid != NULL)) {
      if (CompareGuid((GUID *)(VOID *)&((EFI_IFR_FORM_SET *) IfrOpHdr)->Guid, FormSetGuid)) {
        GetFormSet = TRUE;
      } else {
        GetFormSet = FALSE;
      }
    } else if (IfrOpHdr->OpCode == EFI_IFR_FORM_OP || IfrOpHdr->OpCode == EFI_IFR_FORM_MAP_OP) {
      if (CompareMem (&((EFI_IFR_FORM *) IfrOpHdr)->FormId, &FormId, sizeof (EFI_FORM_ID)) == 0) {
        GetForm = TRUE;
      } else {
        GetForm = FALSE;
      }
    }
    
    //
    // The matched Form is found, and Update data in this form
    //
    if (GetFormSet && GetForm) {
      UpdateIfrOpHdr = (EFI_IFR_OP_HEADER *) OpCodeBufferStart->Buffer;
      if ((UpdateIfrOpHdr->Length == IfrOpHdr->Length) && \
          (CompareMem (IfrOpHdr, UpdateIfrOpHdr, UpdateIfrOpHdr->Length) == 0)) {
        //
        // Remove the original data when End OpCode buffer exist.
        //
        if (OpCodeBufferEnd != NULL) {
          Offset        += IfrOpHdr->Length;
          IfrOpHdr       = (EFI_IFR_OP_HEADER *) ((UINT8 *) (IfrOpHdr) + IfrOpHdr->Length);
          UpdateIfrOpHdr = (EFI_IFR_OP_HEADER *) OpCodeBufferEnd->Buffer;
          while (Offset < PackageHeader.Length) {
            //
            // Search the matched end opcode
            //
            if ((UpdateIfrOpHdr->Length == IfrOpHdr->Length) && \
                (CompareMem (IfrOpHdr, UpdateIfrOpHdr, UpdateIfrOpHdr->Length) == 0)) {
              break;
            }
            //
            // Go to the next Op-Code
            //
            Offset        += IfrOpHdr->Length;
            IfrOpHdr       = (EFI_IFR_OP_HEADER *) ((UINT8 *) (IfrOpHdr) + IfrOpHdr->Length);
          }
          
          if (Offset >= PackageHeader.Length) {
            //
            // The end opcode is not found.
            //
            return EFI_NOT_FOUND;
          }
        }

        //
        // Insert the updated data
        //
        AddSize = ((EFI_IFR_OP_HEADER *) OpCodeBufferStart->Buffer)->Length;
        CopyMem (BufferPos, OpCodeBufferStart->Buffer + AddSize, OpCodeBufferStart->Position - AddSize);
        BufferPos           += OpCodeBufferStart->Position - AddSize;
        UpdatePackageLength += OpCodeBufferStart->Position - AddSize;

        if (OpCodeBufferEnd != NULL) {
          //
          // Add the end opcode
          //
          CopyMem (BufferPos, IfrOpHdr, IfrOpHdr->Length);
          BufferPos           += IfrOpHdr->Length;
          UpdatePackageLength += IfrOpHdr->Length;
        }

        //
        // Copy the left package data.
        //
        Offset += IfrOpHdr->Length;
        CopyMem (BufferPos, (UINT8 *) Package + Offset, PackageHeader.Length - Offset);
        UpdatePackageLength += PackageHeader.Length - Offset;

        //
        // Set update flag
        //
        Updated = TRUE;
        break;
      }
    }

    //
    // Go to the next Op-Code
    //
    Offset   += IfrOpHdr->Length;
    IfrOpHdr = (EFI_IFR_OP_HEADER *) ((CHAR8 *) (IfrOpHdr) + IfrOpHdr->Length);
  }
  
  if (!Updated) {
    //
    // The updated opcode buffer is not found.
    //
    return EFI_NOT_FOUND;
  }
  //
  // Update the package length.
  //
  PackageHeader.Length = (UINT32) UpdatePackageLength;
  CopyMem (TempPackage, &PackageHeader, sizeof (EFI_HII_PACKAGE_HEADER));

  return EFI_SUCCESS;
}

/**
  This function updates a form that has previously been registered with the HII 
  Database.  This function will perform at most one update operation.
    
  The form to update is specified by Handle, FormSetGuid, and FormId.  Binary 
  comparisons of IFR opcodes are performed from the beginning of the form being 
  updated until an IFR opcode is found that exactly matches the first IFR opcode 
  specified by StartOpCodeHandle.  The following rules are used to determine if
  an insert, replace, or delete operation is performed.
  
  1) If no matches are found, then NULL is returned.  
  2) If a match is found, and EndOpCodeHandle is NULL, then all of the IFR opcodes
     from StartOpCodeHandle except the first opcode are inserted immediately after 
     the matching IFR opcode in the form to be updated.
  3) If a match is found, and EndOpCodeHandle is not NULL, then a search is made 
     from the matching IFR opcode until an IFR opcode exactly matches the first 
     IFR opcode specified by EndOpCodeHandle.  If no match is found for the first
     IFR opcode specified by EndOpCodeHandle, then NULL is returned.  If a match
     is found, then all of the IFR opcodes between the start match and the end 
     match are deleted from the form being updated and all of the IFR opcodes
     from StartOpCodeHandle except the first opcode are inserted immediately after 
     the matching start IFR opcode.  If StartOpCcodeHandle only contains one
     IFR instruction, then the result of this operation will delete all of the IFR
     opcodes between the start end matches.

  If HiiHandle is NULL, then ASSERT().
  If StartOpCodeHandle is NULL, then ASSERT().

  @param[in]  HiiHandle          The HII Handle of the form to update.
  @param[in]  FormSetGuid        The Formset GUID of the form to update.  This
                                 is an optional parameter that may be NULL.
                                 If it is NULL, all FormSet will be updated.
  @param[in]  FormId             The ID of the form to update.
  @param[in]  StartOpCodeHandle  An OpCode Handle that contains the set of IFR 
                                 opcodes to be inserted or replaced in the form.
                                 The first IFR instruction in StartOpCodeHandle 
                                 is used to find matching IFR opcode in the 
                                 form. 
  @param[in]  EndOpCodeHandle    An OpCcode Handle that contains the IFR opcode
                                 that marks the end of a replace operation in
                                 the form.  This is an optional parameter that
                                 may be NULL.  If it is NULL, then an the IFR
                                 opcodes specified by StartOpCodeHandle are 
                                 inserted into the form.
  
  @retval EFI_OUT_OF_RESOURCES   No enough memory resource is allocated.
  @retval EFI_NOT_FOUND          The following cases will return EFI_NOT_FOUND.
                                 1) The form specified by HiiHandle, FormSetGuid, 
                                 and FormId could not be found in the HII Database.
                                 2) No IFR opcodes in the target form match the first
                                 IFR opcode in StartOpCodeHandle.
                                 3) EndOpCOde is not NULL, and no IFR opcodes in the 
                                 target form following a matching start opcode match 
                                 the first IFR opcode in EndOpCodeHandle.
  @retval EFI_SUCCESS            The matched form is updated by StartOpcode.

**/
EFI_STATUS
EFIAPI
HiiUpdateForm (
  IN EFI_HII_HANDLE  HiiHandle,           
  IN EFI_GUID        *FormSetGuid,        OPTIONAL
  IN EFI_FORM_ID     FormId,
  IN VOID            *StartOpCodeHandle,
  IN VOID            *EndOpCodeHandle     OPTIONAL
  )
{
  EFI_STATUS                   Status;
  EFI_HII_PACKAGE_LIST_HEADER  *HiiPackageList;
  UINT32                       PackageListLength;  
  UINT32                       Offset;
  EFI_HII_PACKAGE_LIST_HEADER  *UpdatePackageList;
  UINTN                        BufferSize;
  UINT8                        *UpdateBufferPos;
  EFI_HII_PACKAGE_HEADER       *Package;
  EFI_HII_PACKAGE_HEADER       *TempPacakge;
  EFI_HII_PACKAGE_HEADER       PackageHeader;
  BOOLEAN                      Updated;
  HII_LIB_OPCODE_BUFFER        *OpCodeBufferStart;
  HII_LIB_OPCODE_BUFFER        *OpCodeBufferEnd;
  
  //
  // Input update data can't be NULL.
  //
  ASSERT (HiiHandle != NULL);
  ASSERT (StartOpCodeHandle != NULL);
  UpdatePackageList = NULL;
  TempPacakge       = NULL;
  HiiPackageList    = NULL;
  
  //
  // Retrieve buffer data from Opcode Handle
  //
  OpCodeBufferStart = (HII_LIB_OPCODE_BUFFER *) StartOpCodeHandle;
  OpCodeBufferEnd   = (HII_LIB_OPCODE_BUFFER *) EndOpCodeHandle;
  
  //
  // Get the original package list
  //
  BufferSize = 0;
  HiiPackageList   = NULL;
  Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
  //
  // The return status should always be EFI_BUFFER_TOO_SMALL as input buffer's size is 0.
  //
  if (Status != EFI_BUFFER_TOO_SMALL) {
    return Status;
  }

  HiiPackageList = AllocatePool (BufferSize);
  if (HiiPackageList == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto Finish;
  }

  Status = gHiiDatabase->ExportPackageLists (gHiiDatabase, HiiHandle, &BufferSize, HiiPackageList);
  if (EFI_ERROR (Status)) {
    goto Finish;
  }

  //
  // Calculate and allocate space for retrieval of IFR data
  //
  BufferSize += OpCodeBufferStart->Position;
  UpdatePackageList = AllocateZeroPool (BufferSize);
  if (UpdatePackageList == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto Finish;
  }
  
  //
  // Allocate temp buffer to store the temp updated package buffer
  //
  TempPacakge = AllocateZeroPool (BufferSize);
  if (TempPacakge == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto Finish;
  }

  UpdateBufferPos = (UINT8 *) UpdatePackageList;

  //
  // Copy the package list header
  //
  CopyMem (UpdateBufferPos, HiiPackageList, sizeof (EFI_HII_PACKAGE_LIST_HEADER));
  UpdateBufferPos += sizeof (EFI_HII_PACKAGE_LIST_HEADER);
  
  //
  // Go through each package to find the matched package and update one by one
  //
  Updated = FALSE;
  Offset  = sizeof (EFI_HII_PACKAGE_LIST_HEADER);
  PackageListLength = ReadUnaligned32 (&HiiPackageList->PackageLength);
  while (Offset < PackageListLength) {
    Package = (EFI_HII_PACKAGE_HEADER *) (((UINT8 *) HiiPackageList) + Offset);
    CopyMem (&PackageHeader, Package, sizeof (EFI_HII_PACKAGE_HEADER));
    Offset += Package->Length;

    if (Package->Type == EFI_HII_PACKAGE_FORMS) {
      //
      // Check this package is the matched package.
      //
      Status = InternalHiiUpdateFormPackageData (FormSetGuid, FormId, Package, OpCodeBufferStart, OpCodeBufferEnd, TempPacakge);
      //
      // The matched package is found. Its package buffer will be updated by the input new data.
      //
      if (!EFI_ERROR(Status)) {
        //
        // Set Update Flag
        //        
        Updated = TRUE;
        //
        // Add updated package buffer
        //
        Package = TempPacakge;
      }
    }

    //
    // Add pacakge buffer
    //
    CopyMem (&PackageHeader, Package, sizeof (EFI_HII_PACKAGE_HEADER));
    CopyMem (UpdateBufferPos, Package, PackageHeader.Length);
    UpdateBufferPos += PackageHeader.Length;
  }
  
  if (Updated) {
    //
    // Update package list length
    //
    BufferSize = UpdateBufferPos - (UINT8 *) UpdatePackageList;
    WriteUnaligned32 (&UpdatePackageList->PackageLength, (UINT32) BufferSize);
    
    //
    // Update Package to show form
    //
    Status = gHiiDatabase->UpdatePackageList (gHiiDatabase, HiiHandle, UpdatePackageList);
  } else {
    //
    // Not matched form is found and updated.
    //
    Status = EFI_NOT_FOUND;
  }

Finish:
  if (HiiPackageList != NULL) {
    FreePool (HiiPackageList);
  }
  
  if (UpdatePackageList != NULL) {
    FreePool (UpdatePackageList);
  }
  
  if (TempPacakge != NULL) {
    FreePool (TempPacakge);
  }

  return Status; 
}