diff options
Diffstat (limited to 'xfa/src/fxbarcode/BC_UtilRSS.cpp')
| -rw-r--r-- | xfa/src/fxbarcode/BC_UtilRSS.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/xfa/src/fxbarcode/BC_UtilRSS.cpp b/xfa/src/fxbarcode/BC_UtilRSS.cpp new file mode 100644 index 0000000000..c65df34e13 --- /dev/null +++ b/xfa/src/fxbarcode/BC_UtilRSS.cpp @@ -0,0 +1,164 @@ +// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+// Original code is licensed as follows:
+/*
+ * Copyright 2009 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "barcode.h"
+#include "BC_UtilRSS.h"
+CBC_UtilRSS::CBC_UtilRSS()
+{
+}
+CBC_UtilRSS::~CBC_UtilRSS()
+{
+}
+CFX_Int32Array *CBC_UtilRSS::GetRssWidths(FX_INT32 val, FX_INT32 n, FX_INT32 elements, FX_INT32 maxWidth, FX_BOOL noNarrow)
+{
+ CFX_Int32Array *iTemp = FX_NEW CFX_Int32Array;
+ iTemp->SetSize(elements);
+ CBC_AutoPtr<CFX_Int32Array > widths(iTemp);
+ FX_INT32 bar;
+ FX_INT32 narrowMask = 0;
+ for (bar = 0; bar < elements - 1; bar++) {
+ narrowMask |= (1 << bar);
+ FX_INT32 elmWidth = 1;
+ FX_INT32 subVal;
+ while (TRUE) {
+ subVal = Combins(n - elmWidth - 1, elements - bar - 2);
+ if (noNarrow && (narrowMask == 0) &&
+ (n - elmWidth - (elements - bar - 1) >= elements - bar - 1)) {
+ subVal -= Combins(n - elmWidth - (elements - bar), elements - bar - 2);
+ }
+ if (elements - bar - 1 > 1) {
+ FX_INT32 lessVal = 0;
+ for (FX_INT32 mxwElement = n - elmWidth - (elements - bar - 2);
+ mxwElement > maxWidth;
+ mxwElement--) {
+ lessVal += Combins(n - elmWidth - mxwElement - 1, elements - bar - 3);
+ }
+ subVal -= lessVal * (elements - 1 - bar);
+ } else if (n - elmWidth > maxWidth) {
+ subVal--;
+ }
+ val -= subVal;
+ if (val < 0) {
+ break;
+ }
+ elmWidth++;
+ narrowMask &= ~(1 << bar);
+ }
+ val += subVal;
+ n -= elmWidth;
+ (*widths)[bar] = elmWidth;
+ }
+ (*widths)[bar] = n;
+ return widths.release();
+}
+FX_INT32 CBC_UtilRSS::GetRSSvalue(CFX_Int32Array &widths, FX_INT32 maxWidth, FX_BOOL noNarrow)
+{
+ FX_INT32 elements = widths.GetSize();
+ FX_INT32 n = 0;
+ for (FX_INT32 i = 0; i < elements; i++) {
+ n += widths[i];
+ }
+ FX_INT32 val = 0;
+ FX_INT32 narrowMask = 0;
+ for (FX_INT32 bar = 0; bar < elements - 1; bar++) {
+ FX_INT32 elmWidth;
+ for (elmWidth = 1, narrowMask |= (1 << bar);
+ elmWidth < widths[bar];
+ elmWidth++, narrowMask &= ~(1 << bar)) {
+ FX_INT32 subVal = Combins(n - elmWidth - 1, elements - bar - 2);
+ if (noNarrow && (narrowMask == 0) &&
+ (n - elmWidth - (elements - bar - 1) >= elements - bar - 1)) {
+ subVal -= Combins(n - elmWidth - (elements - bar),
+ elements - bar - 2);
+ }
+ if (elements - bar - 1 > 1) {
+ FX_INT32 lessVal = 0;
+ for (FX_INT32 mxwElement = n - elmWidth - (elements - bar - 2);
+ mxwElement > maxWidth; mxwElement--) {
+ lessVal += Combins(n - elmWidth - mxwElement - 1,
+ elements - bar - 3);
+ }
+ subVal -= lessVal * (elements - 1 - bar);
+ } else if (n - elmWidth > maxWidth) {
+ subVal--;
+ }
+ val += subVal;
+ }
+ n -= elmWidth;
+ }
+ return val;
+}
+FX_INT32 CBC_UtilRSS::Combins(FX_INT32 n, FX_INT32 r)
+{
+ FX_INT32 maxDenom;
+ FX_INT32 minDenom;
+ if (n - r > r) {
+ minDenom = r;
+ maxDenom = n - r;
+ } else {
+ minDenom = n - r;
+ maxDenom = r;
+ }
+ FX_INT32 val = 1;
+ FX_INT32 j = 1;
+ for (FX_INT32 i = n; i > maxDenom; i--) {
+ val *= i;
+ if (j <= minDenom) {
+ val /= j;
+ j++;
+ }
+ }
+ while (j <= minDenom) {
+ val /= j;
+ j++;
+ }
+ return val;
+}
+CFX_Int32Array *CBC_UtilRSS::Elements(CFX_Int32Array &eDist, FX_INT32 N, FX_INT32 K)
+{
+ CFX_Int32Array *widths = FX_NEW CFX_Int32Array;
+ widths->SetSize(eDist.GetSize() + 2);
+ FX_INT32 twoK = K << 1;
+ (*widths)[0] = 1;
+ FX_INT32 i;
+ FX_INT32 minEven = 10;
+ FX_INT32 barSum = 1;
+ for (i = 1; i < twoK - 2; i += 2) {
+ (*widths)[i] = eDist[i - 1] - (*widths)[i - 1];
+ (*widths)[i + 1] = eDist[i] - (*widths)[i];
+ barSum += (*widths)[i] + (*widths)[i + 1];
+ if ((*widths)[i] < minEven) {
+ minEven = (*widths)[i];
+ }
+ }
+ (*widths)[twoK - 1] = N - barSum;
+ if ((*widths)[twoK - 1] < minEven) {
+ minEven = (*widths)[twoK - 1];
+ }
+ if (minEven > 1) {
+ for (i = 0; i < twoK; i += 2) {
+ (*widths)[i] += minEven - 1;
+ (*widths)[i + 1] -= minEven - 1;
+ }
+ }
+ return widths;
+}
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