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source: kBuild/trunk/src/kmk/kmkbuiltin/printf.c@ 982

Last change on this file since 982 was 942, checked in by bird, 18 years ago

Always use the GNU make getopt stuff.
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File size: 14.1 KB
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1/* $NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $ */
2
3/*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*#include <sys/cdefs.h>
33#ifndef lint
34#if !defined(BUILTIN) && !defined(SHELL)
35__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
36 The Regents of the University of California. All rights reserved.\n");
37#endif
38#endif
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)printf.c 8.2 (Berkeley) 3/22/95";
43#else
44__RCSID("$NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $");
45#endif
46#endif*/ /* not lint */
47
48#include <sys/types.h>
49
50#include <ctype.h>
51#include "err.h"
52#include <errno.h>
53#include <inttypes.h>
54#include <limits.h>
55#include <locale.h>
56#include <stdarg.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <unistd.h>
61
62#ifdef __sun__
63# include "solfakes.h"
64#endif
65#ifdef _MSC_VER
66# include "mscfakes.h"
67#endif
68
69#ifdef __GNUC__
70#define ESCAPE '\e'
71#else
72#define ESCAPE 033
73#endif
74
75static void conv_escape_str(char *, void (*)(int));
76static char *conv_escape(char *, char *);
77static char *conv_expand(const char *);
78static int getchr(void);
79static double getdouble(void);
80static int getwidth(void);
81static intmax_t getintmax(void);
82static uintmax_t getuintmax(void);
83static char *getstr(void);
84static char *mklong(const char *, int);
85static void check_conversion(const char *, const char *);
86static void usage(void);
87
88static void b_count(int);
89static void b_output(int);
90static size_t b_length;
91static char *b_fmt;
92
93static int rval;
94static char **gargv;
95
96#ifdef BUILTIN /* csh builtin */
97#define kmk_builtin_printf progprintf
98#endif
99
100#ifdef SHELL /* sh (aka ash) builtin */
101#define kmk_builtin_printf printfcmd
102#include "../../bin/sh/bltin/bltin.h"
103#endif /* SHELL */
104
105#define PF(f, func) { \
106 if (fieldwidth != -1) { \
107 if (precision != -1) \
108 (void)printf(f, fieldwidth, precision, func); \
109 else \
110 (void)printf(f, fieldwidth, func); \
111 } else if (precision != -1) \
112 (void)printf(f, precision, func); \
113 else \
114 (void)printf(f, func); \
115}
116
117#define APF(cpp, f, func) { \
118 if (fieldwidth != -1) { \
119 if (precision != -1) \
120 (void)asprintf(cpp, f, fieldwidth, precision, func); \
121 else \
122 (void)asprintf(cpp, f, fieldwidth, func); \
123 } else if (precision != -1) \
124 (void)asprintf(cpp, f, precision, func); \
125 else \
126 (void)asprintf(cpp, f, func); \
127}
128
129int kmk_builtin_printf(int argc, char *argv[])
130{
131 char *fmt, *start;
132 int fieldwidth, precision;
133 char nextch;
134 char *format;
135 int ch;
136
137 /* kmk: reinitialize globals */
138 b_length = 0;
139 b_fmt = NULL;
140 rval = 0;
141 gargv = NULL;
142
143 /* kmk: reset getopt and set progname */
144 g_progname = argv[0];
145 opterr = 1;
146 optarg = NULL;
147 optopt = 0;
148 optind = 0; /* init */
149
150#if !defined(SHELL) && !defined(BUILTIN) && !defined(kmk_builtin_printf) /* kmk did this already. */
151 (void)setlocale (LC_ALL, "");
152#endif
153
154 while ((ch = getopt(argc, argv, "")) != -1) {
155 switch (ch) {
156 case '?':
157 default:
158 usage();
159 return 1;
160 }
161 }
162 argc -= optind;
163 argv += optind;
164
165 if (argc < 1) {
166 usage();
167 return 1;
168 }
169
170 format = *argv;
171 gargv = ++argv;
172
173#define SKIP1 "#-+ 0"
174#define SKIP2 "*0123456789"
175 do {
176 /*
177 * Basic algorithm is to scan the format string for conversion
178 * specifications -- once one is found, find out if the field
179 * width or precision is a '*'; if it is, gather up value.
180 * Note, format strings are reused as necessary to use up the
181 * provided arguments, arguments of zero/null string are
182 * provided to use up the format string.
183 */
184
185 /* find next format specification */
186 for (fmt = format; (ch = *fmt++) != '\0';) {
187 if (ch == '\\') {
188 char c_ch;
189 fmt = conv_escape(fmt, &c_ch);
190 putchar(c_ch);
191 continue;
192 }
193 if (ch != '%' || (*fmt == '%' && ++fmt)) {
194 (void)putchar(ch);
195 continue;
196 }
197
198 /* Ok - we've found a format specification,
199 Save its address for a later printf(). */
200 start = fmt - 1;
201
202 /* skip to field width */
203 fmt += strspn(fmt, SKIP1);
204 fieldwidth = *fmt == '*' ? getwidth() : -1;
205
206 /* skip to possible '.', get following precision */
207 fmt += strspn(fmt, SKIP2);
208 if (*fmt == '.')
209 ++fmt;
210 precision = *fmt == '*' ? getwidth() : -1;
211
212 fmt += strspn(fmt, SKIP2);
213
214 ch = *fmt;
215 if (!ch) {
216 warnx("missing format character");
217 return (1);
218 }
219 /* null terminate format string to we can use it
220 as an argument to printf. */
221 nextch = fmt[1];
222 fmt[1] = 0;
223 switch (ch) {
224
225 case 'B': {
226 const char *p = conv_expand(getstr());
227 *fmt = 's';
228 PF(start, p);
229 break;
230 }
231 case 'b': {
232 /* There has to be a better way to do this,
233 * but the string we generate might have
234 * embedded nulls. */
235 static char *a, *t;
236 char *cp = getstr();
237 /* Free on entry in case shell longjumped out */
238 if (a != NULL)
239 free(a);
240 a = NULL;
241 if (t != NULL)
242 free(t);
243 t = NULL;
244 /* Count number of bytes we want to output */
245 b_length = 0;
246 conv_escape_str(cp, b_count);
247 t = malloc(b_length + 1);
248 if (t == NULL)
249 break;
250 memset(t, 'x', b_length);
251 t[b_length] = 0;
252 /* Get printf to calculate the lengths */
253 *fmt = 's';
254 APF(&a, start, t);
255 b_fmt = a;
256 /* Output leading spaces and data bytes */
257 conv_escape_str(cp, b_output);
258 /* Add any trailing spaces */
259 printf("%s", b_fmt);
260 break;
261 }
262 case 'c': {
263 char p = getchr();
264 PF(start, p);
265 break;
266 }
267 case 's': {
268 char *p = getstr();
269 PF(start, p);
270 break;
271 }
272 case 'd':
273 case 'i': {
274 intmax_t p = getintmax();
275 char *f = mklong(start, ch);
276 PF(f, p);
277 break;
278 }
279 case 'o':
280 case 'u':
281 case 'x':
282 case 'X': {
283 uintmax_t p = getuintmax();
284 char *f = mklong(start, ch);
285 PF(f, p);
286 break;
287 }
288 case 'e':
289 case 'E':
290 case 'f':
291 case 'g':
292 case 'G': {
293 double p = getdouble();
294 PF(start, p);
295 break;
296 }
297 default:
298 warnx("%s: invalid directive", start);
299 return 1;
300 }
301 *fmt++ = ch;
302 *fmt = nextch;
303 /* escape if a \c was encountered */
304 if (rval & 0x100)
305 return rval & ~0x100;
306 }
307 } while (gargv != argv && *gargv);
308
309 return rval;
310}
311
312/* helper functions for conv_escape_str */
313
314static void
315/*ARGSUSED*/
316b_count(int ch)
317{
318 b_length++;
319}
320
321/* Output one converted character for every 'x' in the 'format' */
322
323static void
324b_output(int ch)
325{
326 for (;;) {
327 switch (*b_fmt++) {
328 case 0:
329 b_fmt--;
330 return;
331 case ' ':
332 putchar(' ');
333 break;
334 default:
335 putchar(ch);
336 return;
337 }
338 }
339}
340
341
342/*
343 * Print SysV echo(1) style escape string
344 * Halts processing string if a \c escape is encountered.
345 */
346static void
347conv_escape_str(char *str, void (*do_putchar)(int))
348{
349 int value;
350 int ch;
351 char c;
352
353 while ((ch = *str++) != '\0') {
354 if (ch != '\\') {
355 do_putchar(ch);
356 continue;
357 }
358
359 ch = *str++;
360 if (ch == 'c') {
361 /* \c as in SYSV echo - abort all processing.... */
362 rval |= 0x100;
363 break;
364 }
365
366 /*
367 * %b string octal constants are not like those in C.
368 * They start with a \0, and are followed by 0, 1, 2,
369 * or 3 octal digits.
370 */
371 if (ch == '0') {
372 int octnum = 0, i;
373 for (i = 0; i < 3; i++) {
374 if (!isdigit((unsigned char)*str) || *str > '7')
375 break;
376 octnum = (octnum << 3) | (*str++ - '0');
377 }
378 do_putchar(octnum);
379 continue;
380 }
381
382 /* \[M][^|-]C as defined by vis(3) */
383 if (ch == 'M' && *str == '-') {
384 do_putchar(0200 | str[1]);
385 str += 2;
386 continue;
387 }
388 if (ch == 'M' && *str == '^') {
389 str++;
390 value = 0200;
391 ch = '^';
392 } else
393 value = 0;
394 if (ch == '^') {
395 ch = *str++;
396 if (ch == '?')
397 value |= 0177;
398 else
399 value |= ch & 037;
400 do_putchar(value);
401 continue;
402 }
403
404 /* Finally test for sequences valid in the format string */
405 str = conv_escape(str - 1, &c);
406 do_putchar(c);
407 }
408}
409
410/*
411 * Print "standard" escape characters
412 */
413static char *
414conv_escape(char *str, char *conv_ch)
415{
416 int value;
417 int ch;
418 char num_buf[4], *num_end;
419
420 ch = *str++;
421
422 switch (ch) {
423 case '0': case '1': case '2': case '3':
424 case '4': case '5': case '6': case '7':
425 num_buf[0] = ch;
426 ch = str[0];
427 num_buf[1] = ch;
428 num_buf[2] = ch ? str[1] : 0;
429 num_buf[3] = 0;
430 value = strtoul(num_buf, &num_end, 8);
431 str += num_end - (num_buf + 1);
432 break;
433
434 case 'x':
435 /* Hexadecimal character constants are not required to be
436 supported (by SuS v1) because there is no consistent
437 way to detect the end of the constant.
438 Supporting 2 byte constants is a compromise. */
439 ch = str[0];
440 num_buf[0] = ch;
441 num_buf[1] = ch ? str[1] : 0;
442 num_buf[2] = 0;
443 value = strtoul(num_buf, &num_end, 16);
444 str += num_end - num_buf;
445 break;
446
447 case '\\': value = '\\'; break; /* backslash */
448 case '\'': value = '\''; break; /* single quote */
449 case '"': value = '"'; break; /* double quote */
450 case 'a': value = '\a'; break; /* alert */
451 case 'b': value = '\b'; break; /* backspace */
452 case 'e': value = ESCAPE; break; /* escape */
453 case 'f': value = '\f'; break; /* form-feed */
454 case 'n': value = '\n'; break; /* newline */
455 case 'r': value = '\r'; break; /* carriage-return */
456 case 't': value = '\t'; break; /* tab */
457 case 'v': value = '\v'; break; /* vertical-tab */
458
459 default:
460 warnx("unknown escape sequence `\\%c'", ch);
461 rval = 1;
462 value = ch;
463 break;
464 }
465
466 *conv_ch = value;
467 return str;
468}
469
470/* expand a string so that everything is printable */
471
472static char *
473conv_expand(const char *str)
474{
475 static char *conv_str;
476 static char no_memory[] = "<no memory>";
477 char *cp;
478 int ch;
479
480 if (conv_str)
481 free(conv_str);
482 /* get a buffer that is definitely large enough.... */
483 conv_str = malloc(4 * strlen(str) + 1);
484 if (!conv_str)
485 return no_memory;
486 cp = conv_str;
487
488 while ((ch = *(const unsigned char *)str++) != '\0') {
489 switch (ch) {
490 /* Use C escapes for expected control characters */
491 case '\\': ch = '\\'; break; /* backslash */
492 case '\'': ch = '\''; break; /* single quote */
493 case '"': ch = '"'; break; /* double quote */
494 case '\a': ch = 'a'; break; /* alert */
495 case '\b': ch = 'b'; break; /* backspace */
496 case ESCAPE: ch = 'e'; break; /* escape */
497 case '\f': ch = 'f'; break; /* form-feed */
498 case '\n': ch = 'n'; break; /* newline */
499 case '\r': ch = 'r'; break; /* carriage-return */
500 case '\t': ch = 't'; break; /* tab */
501 case '\v': ch = 'v'; break; /* vertical-tab */
502 default:
503 /* Copy anything printable */
504 if (isprint(ch)) {
505 *cp++ = ch;
506 continue;
507 }
508 /* Use vis(3) encodings for the rest */
509 *cp++ = '\\';
510 if (ch & 0200) {
511 *cp++ = 'M';
512 ch &= ~0200;
513 }
514 if (ch == 0177) {
515 *cp++ = '^';
516 *cp++ = '?';
517 continue;
518 }
519 if (ch < 040) {
520 *cp++ = '^';
521 *cp++ = ch | 0100;
522 continue;
523 }
524 *cp++ = '-';
525 *cp++ = ch;
526 continue;
527 }
528 *cp++ = '\\';
529 *cp++ = ch;
530 }
531
532 *cp = 0;
533 return conv_str;
534}
535
536static char *
537mklong(const char *str, int ch)
538{
539 static char copy[64];
540 size_t len;
541
542 len = strlen(str) + 2;
543 if (len > sizeof copy) {
544 warnx("format %s too complex\n", str);
545 len = 4;
546 }
547 (void)memmove(copy, str, len - 3);
548 copy[len - 3] = 'j';
549 copy[len - 2] = ch;
550 copy[len - 1] = '\0';
551 return copy;
552}
553
554static int
555getchr(void)
556{
557 if (!*gargv)
558 return 0;
559 return (int)**gargv++;
560}
561
562static char *
563getstr(void)
564{
565 static char empty[] = "";
566 if (!*gargv)
567 return empty;
568 return *gargv++;
569}
570
571static int
572getwidth(void)
573{
574 long val;
575 char *s, *ep;
576
577 s = *gargv;
578 if (!*gargv)
579 return (0);
580 gargv++;
581
582 errno = 0;
583 val = strtoul(s, &ep, 0);
584 check_conversion(s, ep);
585
586 /* Arbitrarily 'restrict' field widths to 1Mbyte */
587 if (val < 0 || val > 1 << 20) {
588 warnx("%s: invalid field width", s);
589 return 0;
590 }
591
592 return val;
593}
594
595static intmax_t
596getintmax(void)
597{
598 intmax_t val;
599 char *cp, *ep;
600
601 cp = *gargv;
602 if (cp == NULL)
603 return 0;
604 gargv++;
605
606 if (*cp == '\"' || *cp == '\'')
607 return *(cp+1);
608
609 errno = 0;
610 val = strtoimax(cp, &ep, 0);
611 check_conversion(cp, ep);
612 return val;
613}
614
615static uintmax_t
616getuintmax(void)
617{
618 uintmax_t val;
619 char *cp, *ep;
620
621 cp = *gargv;
622 if (cp == NULL)
623 return 0;
624 gargv++;
625
626 if (*cp == '\"' || *cp == '\'')
627 return *(cp + 1);
628
629 /* strtoumax won't error -ve values */
630 while (isspace(*(unsigned char *)cp))
631 cp++;
632 if (*cp == '-') {
633 warnx("%s: expected positive numeric value", cp);
634 rval = 1;
635 return 0;
636 }
637
638 errno = 0;
639 val = strtoumax(cp, &ep, 0);
640 check_conversion(cp, ep);
641 return val;
642}
643
644static double
645getdouble(void)
646{
647 double val;
648 char *ep;
649
650 if (!*gargv)
651 return (0.0);
652
653 if (**gargv == '\"' || **gargv == '\'')
654 return (double) *((*gargv++)+1);
655
656 errno = 0;
657 val = strtod(*gargv, &ep);
658 check_conversion(*gargv++, ep);
659 return val;
660}
661
662static void
663check_conversion(const char *s, const char *ep)
664{
665 if (*ep) {
666 if (ep == s)
667 warnx("%s: expected numeric value", s);
668 else
669 warnx("%s: not completely converted", s);
670 rval = 1;
671 } else if (errno == ERANGE) {
672 warnx("%s: %s", s, strerror(ERANGE));
673 rval = 1;
674 }
675}
676
677static void
678usage(void)
679{
680 (void)fprintf(stderr, "Usage: %s format [arg ...]\n", g_progname);
681}
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