2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #if !defined(BUILTIN) && !defined(SHELL)
36 static char const copyright[] =
37 "@(#) Copyright (c) 1989, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
44 static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
46 static const char rcsid[] =
50 #include <sys/types.h>
61 #define main printfcmd
62 #include "bltin/bltin.h"
65 #define warnx1(a, b, c) warnx(a)
66 #define warnx2(a, b, c) warnx(a, b)
67 #define warnx3(a, b, c) warnx(a, b, c)
74 #define PF(f, func) do { \
78 (void)asprintf(&b, f, fieldwidth, precision, func); \
80 (void)asprintf(&b, f, fieldwidth, func); \
82 (void)asprintf(&b, f, precision, func); \
84 (void)asprintf(&b, f, func); \
86 (void)fputs(b, stdout); \
91 static int asciicode(void);
92 static char *doformat(char *, int *);
93 static int escape(char *, int, size_t *);
94 static int getchr(void);
95 static int getfloating(long double *, int);
96 static int getint(int *);
97 static int getquads(quad_t *, u_quad_t *, int);
100 static char *mkquad(char *, int);
101 static void usage(void);
107 progprintf(int argc, char *argv[])
109 main(int argc, char *argv[])
113 int ch, chopped, end, rval;
114 char *format, *fmt, *start;
117 (void) setlocale(LC_NUMERIC, "");
119 while ((ch = getopt(argc, argv, "")) != -1)
135 * Basic algorithm is to scan the format string for conversion
136 * specifications -- once one is found, find out if the field
137 * width or precision is a '*'; if it is, gather up value. Note,
138 * format strings are reused as necessary to use up the provided
139 * arguments, arguments of zero/null string are provided to use
140 * up the format string.
142 fmt = format = *argv;
143 chopped = escape(fmt, 1, &len); /* backslash interpretation */
148 while (fmt < format + len) {
150 fwrite(start, 1, fmt - start, stdout);
156 fmt = doformat(fmt, &rval);
167 warnx1("missing format character", NULL, NULL);
170 fwrite(start, 1, fmt - start, stdout);
171 if (chopped || !*gargv)
173 /* Restart at the beginning of the format string. */
182 doformat(char *start, int *rval)
184 static const char skip1[] = "#'-+ 0";
185 static const char skip2[] = "0123456789";
187 int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
191 /* skip to field width */
192 fmt += strspn(fmt, skip1);
194 if (getint(&fieldwidth))
201 /* skip to possible '.', get following precision */
202 fmt += strspn(fmt, skip2);
205 /* precision present? */
208 if (getint(&precision))
215 /* skip to conversion char */
216 fmt += strspn(fmt, skip2);
221 warnx1("missing format character", NULL, NULL);
226 * Look for a length modifier. POSIX doesn't have these, so
227 * we only support them for floating-point conversions, which
228 * are extensions. This is useful because the L modifier can
229 * be used to gain extra range and precision, while omitting
230 * it is more likely to produce consistent results on different
231 * architectures. This is not so important for integers
232 * because overflow is the only bad thing that can happen to
233 * them, but consider the command printf %a 1.1
238 if (!strchr("aAeEfFgG", *fmt)) {
239 warnx2("bad modifier L for %%%c", *fmt, NULL);
256 p = savestr(getstr());
258 p = strdup(getstr());
261 warnx2("%s", strerror(ENOMEM), NULL);
264 getout = escape(p, 0, &len);
291 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
297 signedconv = (convch == 'd' || convch == 'i');
298 if ((f = mkquad(start, convch)) == NULL)
300 if (getquads(&val, &uval, signedconv))
311 case 'a': case 'A': {
314 if (getfloating(&p, mod_ldbl))
319 PF(start, (double)p);
323 warnx2("illegal format character %c", convch, NULL);
331 mkquad(char *str, int ch)
334 static size_t copy_size;
338 len = strlen(str) + 2;
339 if (len > copy_size) {
340 newlen = ((len + 1023) >> 10) << 10;
342 if ((newcopy = ckrealloc(copy, newlen)) == NULL)
344 if ((newcopy = realloc(copy, newlen)) == NULL)
347 warnx2("%s", strerror(ENOMEM), NULL);
354 memmove(copy, str, len - 3);
357 copy[len - 1] = '\0';
362 escape(char *fmt, int percent, size_t *len)
367 for (save = store = fmt; (c = *fmt); ++fmt, ++store) {
373 case '\0': /* EOS, user error */
378 case '\\': /* backslash */
379 case '\'': /* single quote */
382 case 'a': /* bell/alert */
385 case 'b': /* backspace */
392 case 'f': /* form-feed */
395 case 'n': /* newline */
398 case 'r': /* carriage-return */
401 case 't': /* horizontal tab */
404 case 'v': /* vertical tab */
408 case '0': case '1': case '2': case '3':
409 case '4': case '5': case '6': case '7':
410 for (c = *fmt == '0' ? 4 : 3, value = 0;
411 c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
416 if (percent && value == '%') {
437 return ((int)**gargv++);
455 if (getquads(&val, &uval, 1))
458 if (val < INT_MIN || val > INT_MAX) {
459 warnx3("%s: %s", *gargv, strerror(ERANGE));
467 getquads(quad_t *qp, u_quad_t *uqp, int signedconv)
476 if (**gargv == '"' || **gargv == '\'') {
486 *qp = strtoq(*gargv, &ep, 0);
488 *uqp = strtouq(*gargv, &ep, 0);
490 warnx2("%s: expected numeric value", *gargv, NULL);
493 else if (*ep != '\0') {
494 warnx2("%s: not completely converted", *gargv, NULL);
497 if (errno == ERANGE) {
498 warnx3("%s: %s", *gargv, strerror(ERANGE));
506 getfloating(long double *dp, int mod_ldbl)
515 if (**gargv == '"' || **gargv == '\'') {
522 *dp = strtold(*gargv, &ep);
524 *dp = strtod(*gargv, &ep);
526 warnx2("%s: expected numeric value", *gargv, NULL);
528 } else if (*ep != '\0') {
529 warnx2("%s: not completely converted", *gargv, NULL);
532 if (errno == ERANGE) {
533 warnx3("%s: %s", *gargv, strerror(ERANGE));
546 if (ch == '\'' || ch == '"')
555 (void)fprintf(stderr, "usage: printf format [arguments ...]\n");