2 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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 * 4. 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.
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
32 * Important: This file is used both as a standalone program /usr/bin/printf
33 * and as a builtin for /bin/sh (#define SHELL).
38 static char const copyright[] =
39 "@(#) Copyright (c) 1989, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
46 static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
48 static const char rcsid[] =
52 #include <sys/types.h>
67 #define main printfcmd
68 #include "bltin/bltin.h"
72 #define PF(f, func) do { \
76 (void)asprintf(&b, f, fieldwidth, precision, func); \
78 (void)asprintf(&b, f, fieldwidth, func); \
80 (void)asprintf(&b, f, precision, func); \
82 (void)asprintf(&b, f, func); \
84 (void)fputs(b, stdout); \
89 static int asciicode(void);
90 static char *printf_doformat(char *, int *);
91 static int escape(char *, int, size_t *);
92 static int getchr(void);
93 static int getfloating(long double *, int);
94 static int getint(int *);
95 static int getnum(intmax_t *, uintmax_t *, int);
98 static char *mknum(char *, char);
99 static void usage(void);
101 static const char digits[] = "0123456789";
103 static char end_fmt[1];
106 static char **myargv;
108 static char **maxargv;
111 main(int argc, char *argv[])
115 char *format, *fmt, *start;
119 (void) setlocale(LC_ALL, "");
124 argc -= argptr - argv;
127 while ((ch = getopt(argc, argv, "")) != -1)
147 * Basic algorithm is to scan the format string for conversion
148 * specifications -- once one is found, find out if the field
149 * width or precision is a '*'; if it is, gather up value. Note,
150 * format strings are reused as necessary to use up the provided
151 * arguments, arguments of zero/null string are provided to use
152 * up the format string.
154 fmt = format = *argv;
155 escape(fmt, 1, &len); /* backslash interpretation */
163 for (myargc = 0; gargv[myargc]; myargc++)
166 while (fmt < format + len) {
168 fwrite(start, 1, fmt - start, stdout);
174 fmt = printf_doformat(fmt, &rval);
175 if (fmt == NULL || fmt == end_fmt) {
179 return (fmt == NULL ? 1 : rval);
192 warnx("missing format character");
198 fwrite(start, 1, fmt - start, stdout);
205 /* Restart at the beginning of the format string. */
214 printf_doformat(char *fmt, int *rval)
216 static const char skip1[] = "#'-+ 0";
217 int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
219 char start[strlen(fmt) + 1];
230 /* look for "n$" field index specifier */
231 l = strspn(fmt, digits);
232 if ((l > 0) && (fmt[l] == '$')) {
235 gargv = &myargv[idx - 1];
237 gargv = &myargv[myargc];
243 /* save format argument */
249 /* skip to field width */
250 while (*fmt && strchr(skip1, *fmt) != NULL) {
258 l = strspn(fmt, digits);
259 if ((l > 0) && (fmt[l] == '$')) {
262 warnx("incomplete use of n$");
266 gargv = &myargv[idx - 1];
268 gargv = &myargv[myargc];
271 } else if (fargv != NULL) {
272 warnx("incomplete use of n$");
276 if (getint(&fieldwidth))
287 /* skip to possible '.', get following precision */
288 while (isdigit(*fmt)) {
295 /* precision present? */
302 l = strspn(fmt, digits);
303 if ((l > 0) && (fmt[l] == '$')) {
306 warnx("incomplete use of n$");
310 gargv = &myargv[idx - 1];
312 gargv = &myargv[myargc];
315 } else if (fargv != NULL) {
316 warnx("incomplete use of n$");
320 if (getint(&precision))
330 /* skip to conversion char */
331 while (isdigit(*fmt)) {
339 warnx("missing format character");
346 * Look for a length modifier. POSIX doesn't have these, so
347 * we only support them for floating-point conversions, which
348 * are extensions. This is useful because the L modifier can
349 * be used to gain extra range and precision, while omitting
350 * it is more likely to produce consistent results on different
351 * architectures. This is not so important for integers
352 * because overflow is the only bad thing that can happen to
353 * them, but consider the command printf %a 1.1
358 if (!strchr("aAeEfFgG", *fmt)) {
359 warnx("bad modifier L for %%%c", *fmt);
366 /* save the current arg offset, and set to the format arg */
381 p = strdup(getstr());
383 warnx("%s", strerror(ENOMEM));
386 getout = escape(p, 0, &len);
407 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
413 signedconv = (convch == 'd' || convch == 'i');
414 if ((f = mknum(start, convch)) == NULL)
416 if (getnum(&val, &uval, signedconv))
427 case 'a': case 'A': {
430 if (getfloating(&p, mod_ldbl))
435 PF(start, (double)p);
439 warnx("illegal format character %c", convch);
443 /* return the gargv to the next element */
448 mknum(char *str, char ch)
451 static size_t copy_size;
455 len = strlen(str) + 2;
456 if (len > copy_size) {
457 newlen = ((len + 1023) >> 10) << 10;
458 if ((newcopy = realloc(copy, newlen)) == NULL) {
459 warnx("%s", strerror(ENOMEM));
466 memmove(copy, str, len - 3);
469 copy[len - 1] = '\0';
474 escape(char *fmt, int percent, size_t *len)
476 char *save, *store, c;
479 for (save = store = fmt; ((c = *fmt) != 0); ++fmt, ++store) {
485 case '\0': /* EOS, user error */
490 case '\\': /* backslash */
491 case '\'': /* single quote */
494 case 'a': /* bell/alert */
497 case 'b': /* backspace */
508 case 'f': /* form-feed */
511 case 'n': /* newline */
514 case 'r': /* carriage-return */
517 case 't': /* horizontal tab */
520 case 'v': /* vertical tab */
524 case '0': case '1': case '2': case '3':
525 case '4': case '5': case '6': case '7':
526 c = (!percent && *fmt == '0') ? 4 : 3;
528 c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
533 if (percent && value == '%') {
537 *store = (char)value;
554 return ((int)**gargv++);
572 if (getnum(&val, &uval, 1))
575 if (val < INT_MIN || val > INT_MAX) {
576 warnx("%s: %s", *gargv, strerror(ERANGE));
584 getnum(intmax_t *ip, uintmax_t *uip, int signedconv)
593 if (**gargv == '"' || **gargv == '\'') {
603 *ip = strtoimax(*gargv, &ep, 0);
605 *uip = strtoumax(*gargv, &ep, 0);
607 warnx("%s: expected numeric value", *gargv);
610 else if (*ep != '\0') {
611 warnx("%s: not completely converted", *gargv);
614 if (errno == ERANGE) {
615 warnx("%s: %s", *gargv, strerror(ERANGE));
623 getfloating(long double *dp, int mod_ldbl)
632 if (**gargv == '"' || **gargv == '\'') {
639 *dp = strtold(*gargv, &ep);
641 *dp = strtod(*gargv, &ep);
643 warnx("%s: expected numeric value", *gargv);
645 } else if (*ep != '\0') {
646 warnx("%s: not completely converted", *gargv);
649 if (errno == ERANGE) {
650 warnx("%s: %s", *gargv, strerror(ERANGE));
664 ch = (unsigned char)**gargv;
665 if (ch == '\'' || ch == '"') {
666 memset(&mbs, 0, sizeof(mbs));
667 switch (mbrtowc(&wch, *gargv + 1, MB_LEN_MAX, &mbs)) {
670 wch = (unsigned char)gargv[0][1];
685 (void)fprintf(stderr, "usage: printf format [arguments ...]\n");