summaryrefslogtreecommitdiff
path: root/system/alpha/console/printf.c
blob: 0e665a43438b844487e143469024ac96bc6981c5 (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
/*
 * Copyright (c) 2003, 2004
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator, developed by Nathan Binkert,
 * Erik Hallnor, Steve Raasch, and Steve Reinhardt, with contributions
 * from Ron Dreslinski, Dave Greene, Lisa Hsu, Ali Saidi, and Andrew
 * Schultz.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any purpose,
 * so long as the copyright notice above, this grant of permission, and
 * the disclaimer below appear in all copies made; and so long as the
 * name of The University of Michigan is not used in any advertising or
 * publicity pertaining to the use or distribution of this software
 * without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND WITHOUT
 * WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER EXPRESS OR
 * IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REGENTS OF
 * THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE FOR ANY DAMAGES,
 * INCLUDING DIRECT, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
 * DAMAGES, WITH RESPECT TO ANY CLAIM ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OF THE SOFTWARE, EVEN IF IT HAS BEEN OR IS HEREAFTER
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 */

/*
 * Copyright 1993 Hewlett-Packard Development Company, L.P.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <sys/types.h>
#include <stdarg.h>

/* The string s is terminated by a '\0' */
void
PutString(const char *s)
{
    while (*s)
        PutChar(*s++);
}

/* print c count times */
void
PutRepChar(char c, int count)
{
    while (count--)
        PutChar(c);
}

/* put string reverse */
void
PutStringReverse(const char *s, int index)
{
    while (index-- > 0)
        PutChar(s[index]);
}

/*
 * prints value in radix, in a field width width, with fill
 * character fill
 * if radix is negative, print as signed quantity
 * if width is negative, left justify
 * if width is 0, use whatever is needed
 * if fill is 0, use ' '
 */
void
PutNumber(long value, int radix, int width, char fill)
{
    char buffer[40];
    uint bufferindex = 0;
    ulong uvalue;
    ushort digit;
    ushort left = 0;
    ushort negative = 0;

    if (fill == 0)
        fill = ' ';

    if (width < 0) {
        width = -width;
        left = 1;
    }

    if (width < 0 || width > 80)
        width = 0;

    if (radix < 0) {
        radix = -radix;
        if (value < 0) {
            negative = 1;
            value = -value;
        }
    }

    switch (radix) {
      case 8:
      case 10:
      case 16:
        break;

      default:
        PutString("****");
        return;
    }

    uvalue = value;

    do {
        if (radix != 16) {
            digit = (ushort)(uvalue % radix);
            uvalue /= radix;
        } else {
            digit = (ushort)(uvalue & 0xf);
            uvalue = uvalue >> 4;
        }
        buffer[bufferindex] = digit + ((digit <= 9) ? '0' : ('A' - 10));
        bufferindex += 1;
    } while (uvalue != 0);

  /* fill # ' ' and negative cannot happen at once */
    if (negative) {
        buffer[bufferindex] = '-';
        bufferindex += 1;
    }

    if ((uint)width <= bufferindex) {
        PutStringReverse(buffer, bufferindex);
    } else {
        width -= bufferindex;
        if (!left)
            PutRepChar(fill, width);
        PutStringReverse(buffer, bufferindex);
        if (left)
            PutRepChar(fill, width);
    }
}

ulong
power(long base, long n)
{
    ulong p;

    for (p = 1; n > 0; --n)
        p = p * base;
    return p;
}

void
putFloat(double a, int fieldwidth, char fill)
{
    int i;
    ulong b;

    /*
     *  Put out everything before the decimal place.
     */
    PutNumber(((ulong) a), 10, fieldwidth, fill);

    /*
     *  Output the decimal place.
     */
    PutChar('.' & 0x7f);

    /*
     *  Output the n digits after the decimal place.
     */
    for (i = 1; i < 6; i++) {
        b = (ulong)(power(10, i) * (double)(a - (ulong) a));
        PutChar((char)(b % 10) + '0');
    }
}

const char *
FormatItem(const char *f, va_list *ap)
{
    char c;
    int fieldwidth = 0;
    int leftjust = 0;
    int radix = 0;
    char fill = ' ';

    if (*f == '0')
        fill = '0';

    while (c = *f++) {
        if (c >= '0' && c <= '9') {
            fieldwidth = (fieldwidth * 10) + (c - '0');
        } else {
            switch (c) {
              case '\000':
                return(--f);
              case '%':
                PutChar('%');
                return(f);
              case '-':
                leftjust = 1;
                break;
              case 'c': {
                  char a = (char)va_arg(*ap, int);

                  if (leftjust)
                      PutChar(a & 0x7f);
                  if (fieldwidth > 0)
                      PutRepChar(fill, fieldwidth - 1);
                  if (!leftjust)
                      PutChar(a & 0x7f);
                  return(f);
              }
              case 's': {
                  const char *a = va_arg(*ap, const char *);

                  if (leftjust)
                      PutString((const char *) a);
                  if (fieldwidth > strlen((const char *) a))
                      PutRepChar(fill, fieldwidth - strlen((const char *)a));
                  if (!leftjust)
                      PutString((const char *) a);
                  return(f);
              }
              case 'd':
                radix = -10;
                break;
              case 'u':
                radix = 10;
                break;
              case 'x':
                radix = 16;
                break;
              case 'X':
                radix = 16;
                break;
              case 'o':
                radix = 8;
                break;
              case 'f': {
                  double a = va_arg(*ap, double);

                  putFloat(a, fieldwidth, fill);
                  return(f);
              }
              default:   /* unknown switch! */
                radix = 3;
                break;
            }
        }

        if (radix)
            break;
    }

    if (leftjust)
        fieldwidth = -fieldwidth;

    long a = va_arg(*ap, long);
    PutNumber(a, radix, fieldwidth, fill);

    return(f);
}

int
printf(const char *f, ...)
{
    va_list ap;

    va_start(ap, f);

    while (*f) {
        if (*f == '%')
            f = FormatItem(f + 1, &ap);
        else
            PutChar(*f++);
    }

    if (*(f - 1) == '\n') {
        /* add a line-feed (SimOS console output goes to shell */
        PutChar('\r');
    }

    va_end(ap);         /* clean up */
    return 0;
}

void
panic(const char *f, ...)
{
    va_list ap;

    va_start(ap, f);

    printf("CONSOLE PANIC (looping): ");
    while (*f) {
        if (*f == '%')
            f = FormatItem(f + 1, &ap);
        else
            PutChar(*f++);
    }

    va_end(ap);         /* clean up */
    while(1);
}