Use CSTD and remove local CSTD settings which are no longer needed.
[dragonfly.git] / lib / libstand / printf.c
CommitLineData
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1/*-
2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: src/lib/libstand/printf.c,v 1.4 1999/12/27 08:45:14 peter Exp $
ff2aef30 40 * $DragonFly: src/lib/libstand/printf.c,v 1.6 2005/12/11 02:27:26 swildner Exp $
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41 */
42
43/*
44 * Standaloneified version of the FreeBSD kernel printf family.
45 */
46
47#include <sys/types.h>
48#include <string.h>
49#include "stand.h"
50
51/*
52 * Note that stdarg.h and the ANSI style va_start macro is used for both
53 * ANSI and traditional C compilers.
54 */
41e8adcb 55#include <stdarg.h>
984263bc 56
2099051c
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57struct snprintf_arg {
58 char *buf;
59 size_t remain;
60};
61
62static char *ksprintn(u_long, int, int *);
63static int kvprintf(const char *, void (*)(int, void *), void *, int,
64 va_list);
65static void putchar_wrapper(int, void *);
66static void snprintf_func(int, void *);
67
68static void
69putchar_wrapper(int ch, void *arg __unused)
70{
71 putchar(ch);
72}
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73
74int
75printf(const char *fmt, ...)
76{
77 va_list ap;
78 int retval;
79
80 va_start(ap, fmt);
2099051c 81 retval = kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
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82 va_end(ap);
83 return retval;
84}
85
86void
87vprintf(const char *fmt, va_list ap)
88{
89
2099051c 90 kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
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91}
92
93int
94sprintf(char *buf, const char *cfmt, ...)
95{
96 int retval;
97 va_list ap;
98
99 va_start(ap, cfmt);
100 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
101 buf[retval] = '\0';
102 va_end(ap);
103 return retval;
104}
105
106void
107vsprintf(char *buf, const char *cfmt, va_list ap)
108{
109 int retval;
110
111 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
112 buf[retval] = '\0';
113}
114
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115int
116snprintf(char *buf, size_t size, const char *cfmt, ...)
117{
118 int retval;
119 va_list ap;
120
121 va_start(ap, cfmt);
122 retval = vsnprintf(buf, size, cfmt, ap);
123 __va_end(ap);
124 return(retval);
125}
126
127int
128vsnprintf(char *buf, size_t size, const char *cfmt, va_list ap)
129{
130 struct snprintf_arg info;
131 int retval;
132
133 info.buf = buf;
134 info.remain = size;
135 retval = kvprintf(cfmt, snprintf_func, &info, 10, ap);
136 if (info.remain >= 1)
137 *info.buf++ = '\0';
138 return(retval);
139}
140
141static void
142snprintf_func(int ch, void *arg)
143{
144 struct snprintf_arg * const info = arg;
145
146 if (info->remain >= 2) {
147 *info->buf++ = ch;
148 info->remain--;
149 }
150}
151
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152/*
153 * Put a number (base <= 16) in a buffer in reverse order; return an
154 * optional length and a pointer to the NULL terminated (preceded?)
155 * buffer.
156 */
157static char *
ff2aef30 158ksprintn(u_long ul, int base, int *lenp)
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159{ /* A long in base 8, plus NULL. */
160 static char buf[sizeof(long) * NBBY / 3 + 2];
660c873b 161 char *p;
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162
163 p = buf;
164 do {
165 *++p = hex2ascii(ul % base);
166 } while (ul /= base);
167 if (lenp)
168 *lenp = p - buf;
169 return (p);
170}
171
172/*
173 * Scaled down version of printf(3).
174 *
175 * Two additional formats:
176 *
177 * The format %b is supported to decode error registers.
178 * Its usage is:
179 *
180 * printf("reg=%b\n", regval, "<base><arg>*");
181 *
182 * where <base> is the output base expressed as a control character, e.g.
183 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
184 * the first of which gives the bit number to be inspected (origin 1), and
185 * the next characters (up to a control character, i.e. a character <= 32),
186 * give the name of the register. Thus:
187 *
188 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
189 *
190 * would produce output:
191 *
192 * reg=3<BITTWO,BITONE>
193 *
194 * XXX: %D -- Hexdump, takes pointer and separator string:
195 * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
196 * ("%*D", len, ptr, " " -> XX XX XX XX ...
197 */
198static int
2099051c
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199kvprintf(char const *fmt, void (*func)(int, void *), void *arg, int radix,
200 va_list ap)
984263bc 201{
2099051c 202#define PCHAR(c) {int cc=(c); if (func) (*func)(cc, arg); else *d++ = cc; retval++; }
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203 char *p, *q, *d;
204 u_char *up;
205 int ch, n;
206 u_long ul;
207 int base, lflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
208 int dwidth;
209 char padc;
210 int retval = 0;
211
212 if (!func)
213 d = (char *) arg;
214 else
215 d = NULL;
216
217 if (fmt == NULL)
218 fmt = "(fmt null)\n";
219
220 if (radix < 2 || radix > 36)
221 radix = 10;
222
223 for (;;) {
224 padc = ' ';
225 width = 0;
226 while ((ch = (u_char)*fmt++) != '%') {
227 if (ch == '\0')
228 return retval;
229 PCHAR(ch);
230 }
231 lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
232 sign = 0; dot = 0; dwidth = 0;
233reswitch: switch (ch = (u_char)*fmt++) {
234 case '.':
235 dot = 1;
236 goto reswitch;
237 case '#':
238 sharpflag = 1;
239 goto reswitch;
240 case '+':
241 sign = 1;
242 goto reswitch;
243 case '-':
244 ladjust = 1;
245 goto reswitch;
246 case '%':
247 PCHAR(ch);
248 break;
249 case '*':
250 if (!dot) {
251 width = va_arg(ap, int);
252 if (width < 0) {
253 ladjust = !ladjust;
254 width = -width;
255 }
256 } else {
257 dwidth = va_arg(ap, int);
258 }
259 goto reswitch;
260 case '0':
261 if (!dot) {
262 padc = '0';
263 goto reswitch;
264 }
265 case '1': case '2': case '3': case '4':
266 case '5': case '6': case '7': case '8': case '9':
267 for (n = 0;; ++fmt) {
268 n = n * 10 + ch - '0';
269 ch = *fmt;
270 if (ch < '0' || ch > '9')
271 break;
272 }
273 if (dot)
274 dwidth = n;
275 else
276 width = n;
277 goto reswitch;
278 case 'b':
279 ul = va_arg(ap, int);
280 p = va_arg(ap, char *);
281 for (q = ksprintn(ul, *p++, NULL); *q;)
282 PCHAR(*q--);
283
284 if (!ul)
285 break;
286
287 for (tmp = 0; *p;) {
288 n = *p++;
289 if (ul & (1 << (n - 1))) {
290 PCHAR(tmp ? ',' : '<');
291 for (; (n = *p) > ' '; ++p)
292 PCHAR(n);
293 tmp = 1;
294 } else
295 for (; *p > ' '; ++p)
296 continue;
297 }
298 if (tmp)
299 PCHAR('>');
300 break;
301 case 'c':
302 PCHAR(va_arg(ap, int));
303 break;
304 case 'D':
305 up = va_arg(ap, u_char *);
306 p = va_arg(ap, char *);
307 if (!width)
308 width = 16;
309 while(width--) {
310 PCHAR(hex2ascii(*up >> 4));
311 PCHAR(hex2ascii(*up & 0x0f));
312 up++;
313 if (width)
314 for (q=p;*q;q++)
315 PCHAR(*q);
316 }
317 break;
318 case 'd':
319 ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
320 sign = 1;
321 base = 10;
322 goto number;
323 case 'l':
324 lflag = 1;
325 goto reswitch;
326 case 'n':
327 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
328 base = radix;
329 goto number;
330 case 'o':
331 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
332 base = 8;
333 goto number;
334 case 'p':
335 ul = (u_long)va_arg(ap, void *);
336 base = 16;
337 sharpflag = 1;
338 goto number;
339 case 's':
340 p = va_arg(ap, char *);
341 if (p == NULL)
342 p = "(null)";
343 if (!dot)
344 n = strlen (p);
345 else
346 for (n = 0; n < dwidth && p[n]; n++)
347 continue;
348
349 width -= n;
350
351 if (!ladjust && width > 0)
352 while (width--)
353 PCHAR(padc);
354 while (n--)
355 PCHAR(*p++);
356 if (ladjust && width > 0)
357 while (width--)
358 PCHAR(padc);
359 break;
360 case 'u':
361 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
362 base = 10;
363 goto number;
364 case 'x':
365 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
366 base = 16;
367number: if (sign && (long)ul < 0L) {
368 neg = 1;
369 ul = -(long)ul;
370 }
371 p = ksprintn(ul, base, &tmp);
372 if (sharpflag && ul != 0) {
373 if (base == 8)
374 tmp++;
375 else if (base == 16)
376 tmp += 2;
377 }
378 if (neg)
379 tmp++;
380
381 if (!ladjust && width && (width -= tmp) > 0)
382 while (width--)
383 PCHAR(padc);
384 if (neg)
385 PCHAR('-');
386 if (sharpflag && ul != 0) {
387 if (base == 8) {
388 PCHAR('0');
389 } else if (base == 16) {
390 PCHAR('0');
391 PCHAR('x');
392 }
393 }
394
395 while (*p)
396 PCHAR(*p--);
397
398 if (ladjust && width && (width -= tmp) > 0)
399 while (width--)
400 PCHAR(padc);
401
402 break;
403 default:
404 PCHAR('%');
405 if (lflag)
406 PCHAR('l');
407 PCHAR(ch);
408 break;
409 }
410 }
411#undef PCHAR
412}
413