1 /*
2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 1989, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/types.h>
32
33 #include <err.h>
34 #include <errno.h>
35 #include <inttypes.h>
36 #include <limits.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41 #include <locale.h>
42 #include <note.h>
43
44 #define warnx1(a, b, c) warnx(a)
45 #define warnx2(a, b, c) warnx(a, b)
46 #define warnx3(a, b, c) warnx(a, b, c)
47
48 #define PTRDIFF(x, y) ((uintptr_t)(x) - (uintptr_t)(y))
49
50 #define _(x) gettext(x)
51
52 #define PF(f, func) do { \
53 char *b = NULL; \
54 int dollar = 0; \
55 if (*f == '$') { \
56 dollar++; \
57 *f = '%'; \
58 } \
59 if (havewidth) \
60 if (haveprec) \
61 (void) asprintf(&b, f, fieldwidth, precision, func); \
62 else \
63 (void) asprintf(&b, f, fieldwidth, func); \
64 else if (haveprec) \
65 (void) asprintf(&b, f, precision, func); \
66 else \
67 (void) asprintf(&b, f, func); \
68 if (b) { \
69 (void) fputs(b, stdout); \
70 free(b); \
71 } \
72 if (dollar) \
73 *f = '$'; \
74 _NOTE(CONSTCOND) } while (0)
75
76 static int asciicode(void);
77 static char *doformat(char *, int *);
78 static int escape(char *, int, size_t *);
79 static int getchr(void);
80 static int getfloating(long double *, int);
81 static int getint(int *);
82 static int getnum(intmax_t *, uintmax_t *, int);
83 static const char
84 *getstr(void);
85 static char *mknum(char *, char);
86 static void usage(void);
87
88 static int myargc;
89 static char **myargv;
90 static char **gargv;
91
92 int
93 main(int argc, char *argv[])
94 {
95 size_t len;
96 int chopped, end, rval;
97 char *format, *fmt, *start;
98
99 (void) setlocale(LC_ALL, "");
100
101 argv++;
102 argc--;
103
104 /*
105 * POSIX says: Standard utilities that do not accept options,
106 * but that do accept operands, shall recognize "--" as a
107 * first argument to be discarded.
108 */
109 if (argc && strcmp(argv[0], "--") == 0) {
110 argc--;
111 argv++;
112 }
113
114 if (argc < 1) {
115 usage();
116 return (1);
117 }
118
119 /*
120 * Basic algorithm is to scan the format string for conversion
121 * specifications -- once one is found, find out if the field
122 * width or precision is a '*'; if it is, gather up value. Note,
123 * format strings are reused as necessary to use up the provided
124 * arguments, arguments of zero/null string are provided to use
125 * up the format string.
126 */
127 fmt = format = *argv;
128 chopped = escape(fmt, 1, &len); /* backslash interpretation */
129 rval = end = 0;
130 gargv = ++argv;
131
132 for (;;) {
133 char **maxargv = gargv;
134
135 myargv = gargv;
136 for (myargc = 0; gargv[myargc]; myargc++)
137 /* nop */;
138 start = fmt;
139 while (fmt < format + len) {
140 if (fmt[0] == '%') {
141 (void) fwrite(start, 1, PTRDIFF(fmt, start),
142 stdout);
143 if (fmt[1] == '%') {
144 /* %% prints a % */
145 (void) putchar('%');
146 fmt += 2;
147 } else {
148 fmt = doformat(fmt, &rval);
149 if (fmt == NULL)
150 return (1);
151 end = 0;
152 }
153 start = fmt;
154 } else
155 fmt++;
156 if (gargv > maxargv)
157 maxargv = gargv;
158 }
159 gargv = maxargv;
160
161 if (end == 1) {
162 warnx1(_("missing format character"), NULL, NULL);
163 return (1);
164 }
165 (void) fwrite(start, 1, PTRDIFF(fmt, start), stdout);
166 if (chopped || !*gargv)
167 return (rval);
168 /* Restart at the beginning of the format string. */
169 fmt = format;
170 end = 1;
171 }
172 /* NOTREACHED */
173 }
174
175
176 static char *
177 doformat(char *start, int *rval)
178 {
179 static const char skip1[] = "#'-+ 0";
180 static const char skip2[] = "0123456789";
181 char *fmt;
182 int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
183 char convch, nextch;
184
185 fmt = start + 1;
186
187 /* look for "n$" field index specifier */
188 fmt += strspn(fmt, skip2);
189 if ((*fmt == '$') && (fmt != (start + 1))) {
190 int idx = atoi(start + 1);
191 if (idx <= myargc) {
192 gargv = &myargv[idx - 1];
193 } else {
194 gargv = &myargv[myargc];
195 }
196 start = fmt;
197 fmt++;
198 } else {
199 fmt = start + 1;
200 }
201
202 /* skip to field width */
203 fmt += strspn(fmt, skip1);
204 if (*fmt == '*') {
205 if (getint(&fieldwidth))
206 return (NULL);
207 havewidth = 1;
208 ++fmt;
209 } else {
210 havewidth = 0;
211
212 /* skip to possible '.', get following precision */
213 fmt += strspn(fmt, skip2);
214 }
215 if (*fmt == '.') {
216 /* precision present? */
217 ++fmt;
218 if (*fmt == '*') {
219 if (getint(&precision))
220 return (NULL);
221 haveprec = 1;
222 ++fmt;
223 } else {
224 haveprec = 0;
225
226 /* skip to conversion char */
227 fmt += strspn(fmt, skip2);
228 }
229 } else
230 haveprec = 0;
231 if (!*fmt) {
232 warnx1(_("missing format character"), NULL, NULL);
233 return (NULL);
234 }
235
236 /*
237 * Look for a length modifier. POSIX doesn't have these, so
238 * we only support them for floating-point conversions, which
239 * are extensions. This is useful because the L modifier can
240 * be used to gain extra range and precision, while omitting
241 * it is more likely to produce consistent results on different
242 * architectures. This is not so important for integers
243 * because overflow is the only bad thing that can happen to
244 * them, but consider the command printf %a 1.1
245 */
246 if (*fmt == 'L') {
247 mod_ldbl = 1;
248 fmt++;
249 if (!strchr("aAeEfFgG", *fmt)) {
250 warnx2(_("bad modifier L for %%%c"), *fmt, NULL);
251 return (NULL);
252 }
253 } else {
254 mod_ldbl = 0;
255 }
256
257 convch = *fmt;
258 nextch = *++fmt;
259 *fmt = '\0';
260 switch (convch) {
261 case 'b': {
262 size_t len;
263 char *p;
264 int getout;
265
266 p = strdup(getstr());
267 if (p == NULL) {
268 warnx2("%s", strerror(ENOMEM), NULL);
269 return (NULL);
270 }
271 getout = escape(p, 0, &len);
272 *(fmt - 1) = 's';
273 PF(start, p);
274 *(fmt - 1) = 'b';
275 free(p);
276
277 if (getout)
278 return (fmt);
279 break;
280 }
281 case 'c': {
282 char p;
283
284 p = getchr();
285 PF(start, p);
286 break;
287 }
288 case 's': {
289 const char *p;
290
291 p = getstr();
292 PF(start, p);
293 break;
294 }
295 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
296 char *f;
297 intmax_t val;
298 uintmax_t uval;
311 }
312 case 'e': case 'E':
313 case 'f': case 'F':
314 case 'g': case 'G':
315 case 'a': case 'A': {
316 long double p;
317
318 if (getfloating(&p, mod_ldbl))
319 *rval = 1;
320 if (mod_ldbl)
321 PF(start, p);
322 else
323 PF(start, (double)p);
324 break;
325 }
326 default:
327 warnx2(_("illegal format character %c"), convch, NULL);
328 return (NULL);
329 }
330 *fmt = nextch;
331 return (fmt);
332 }
333
334 static char *
335 mknum(char *str, char ch)
336 {
337 static char *copy;
338 static size_t copy_size;
339 char *newcopy;
340 size_t len, newlen;
341
342 len = strlen(str) + 2;
343 if (len > copy_size) {
344 newlen = ((len + 1023) >> 10) << 10;
345 if ((newcopy = realloc(copy, newlen)) == NULL) {
346 warnx2("%s", strerror(ENOMEM), NULL);
347 return (NULL);
348 }
349 copy = newcopy;
350 copy_size = newlen;
368 *store = c;
369 continue;
370 }
371 switch (*++fmt) {
372 case '\0': /* EOS, user error */
373 *store = '\\';
374 *++store = '\0';
375 *len = PTRDIFF(store, save);
376 return (0);
377 case '\\': /* backslash */
378 case '\'': /* single quote */
379 *store = *fmt;
380 break;
381 case 'a': /* bell/alert */
382 *store = '\a';
383 break;
384 case 'b': /* backspace */
385 *store = '\b';
386 break;
387 case 'c':
388 *store = '\0';
389 *len = PTRDIFF(store, save);
390 return (1);
391 case 'f': /* form-feed */
392 *store = '\f';
393 break;
394 case 'n': /* newline */
395 *store = '\n';
396 break;
397 case 'r': /* carriage-return */
398 *store = '\r';
399 break;
400 case 't': /* horizontal tab */
401 *store = '\t';
402 break;
403 case 'v': /* vertical tab */
404 *store = '\v';
405 break;
406 /* octal constant */
407 case '0': case '1': case '2': case '3':
408 case '4': case '5': case '6': case '7':
409 c = (!percent && *fmt == '0') ? 4 : 3;
410 for (value = 0;
|
1 /*
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.
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 * 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.
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/types.h>
33
34 #include <err.h>
35 #include <errno.h>
36 #include <inttypes.h>
37 #include <limits.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42 #include <alloca.h>
43 #include <ctype.h>
44 #include <locale.h>
45 #include <note.h>
46
47 #define warnx1(a, b, c) warnx(a)
48 #define warnx2(a, b, c) warnx(a, b)
49 #define warnx3(a, b, c) warnx(a, b, c)
50
51 #define PTRDIFF(x, y) ((uintptr_t)(x) - (uintptr_t)(y))
52
53 #define _(x) gettext(x)
54
55 #define PF(f, func) do { \
56 char *b = NULL; \
57 if (havewidth) \
58 if (haveprec) \
59 (void) asprintf(&b, f, fieldwidth, precision, func); \
60 else \
61 (void) asprintf(&b, f, fieldwidth, func); \
62 else if (haveprec) \
63 (void) asprintf(&b, f, precision, func); \
64 else \
65 (void) asprintf(&b, f, func); \
66 if (b) { \
67 (void) fputs(b, stdout); \
68 free(b); \
69 } \
70 _NOTE(CONSTCOND) } while (0)
71
72 static int asciicode(void);
73 static char *doformat(char *, int *);
74 static int escape(char *, int, size_t *);
75 static int getchr(void);
76 static int getfloating(long double *, int);
77 static int getint(int *);
78 static int getnum(intmax_t *, uintmax_t *, int);
79 static const char
80 *getstr(void);
81 static char *mknum(char *, char);
82 static void usage(void);
83
84 static const char digits[] = "0123456789";
85
86 static int myargc;
87 static char **myargv;
88 static char **gargv;
89 static char **maxargv;
90
91 int
92 main(int argc, char *argv[])
93 {
94 size_t len;
95 int end, rval;
96 char *format, *fmt, *start;
97
98 (void) setlocale(LC_ALL, "");
99
100 argv++;
101 argc--;
102
103 /*
104 * POSIX says: Standard utilities that do not accept options,
105 * but that do accept operands, shall recognize "--" as a
106 * first argument to be discarded.
107 */
108 if (argc && strcmp(argv[0], "--") == 0) {
109 argc--;
110 argv++;
111 }
112
113 if (argc < 1) {
114 usage();
115 return (1);
116 }
117
118 /*
119 * Basic algorithm is to scan the format string for conversion
120 * specifications -- once one is found, find out if the field
121 * width or precision is a '*'; if it is, gather up value. Note,
122 * format strings are reused as necessary to use up the provided
123 * arguments, arguments of zero/null string are provided to use
124 * up the format string.
125 */
126 fmt = format = *argv;
127 (void) escape(fmt, 1, &len); /* backslash interpretation */
128 rval = end = 0;
129 gargv = ++argv;
130
131 for (;;) {
132 maxargv = gargv;
133
134 myargv = gargv;
135 for (myargc = 0; gargv[myargc]; myargc++)
136 /* nop */;
137 start = fmt;
138 while (fmt < format + len) {
139 if (fmt[0] == '%') {
140 (void) fwrite(start, 1, PTRDIFF(fmt, start),
141 stdout);
142 if (fmt[1] == '%') {
143 /* %% prints a % */
144 (void) putchar('%');
145 fmt += 2;
146 } else {
147 fmt = doformat(fmt, &rval);
148 if (fmt == NULL)
149 return (1);
150 end = 0;
151 }
152 start = fmt;
153 } else
154 fmt++;
155 if (gargv > maxargv)
156 maxargv = gargv;
157 }
158 gargv = maxargv;
159
160 if (end == 1) {
161 warnx1(_("missing format character"), NULL, NULL);
162 return (1);
163 }
164 (void) fwrite(start, 1, PTRDIFF(fmt, start), stdout);
165 if (!*gargv)
166 return (rval);
167 /* Restart at the beginning of the format string. */
168 fmt = format;
169 end = 1;
170 }
171 /* NOTREACHED */
172 }
173
174
175 static char *
176 doformat(char *fmt, int *rval)
177 {
178 static const char skip1[] = "#'-+ 0";
179 int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
180 char convch, nextch;
181 char *start;
182 char **fargv;
183 char *dptr;
184 int l;
185
186 start = alloca(strlen(fmt) + 1);
187
188 dptr = start;
189 *dptr++ = '%';
190 *dptr = 0;
191
192 fmt++;
193
194 /* look for "n$" field index specifier */
195 l = strspn(fmt, digits);
196 if ((l > 0) && (fmt[l] == '$')) {
197 int idx = atoi(fmt);
198 if (idx <= myargc) {
199 gargv = &myargv[idx - 1];
200 } else {
201 gargv = &myargv[myargc];
202 }
203 if (gargv > maxargv) {
204 maxargv = gargv;
205 }
206 fmt += l + 1;
207
208 /* save format argument */
209 fargv = gargv;
210 } else {
211 fargv = NULL;
212 }
213
214 /* skip to field width */
215 while (*fmt && strchr(skip1, *fmt) != NULL) {
216 *dptr++ = *fmt++;
217 *dptr = 0;
218 }
219
220
221 if (*fmt == '*') {
222
223 fmt++;
224 l = strspn(fmt, digits);
225 if ((l > 0) && (fmt[l] == '$')) {
226 int idx = atoi(fmt);
227 if (fargv == NULL) {
228 warnx1(_("incomplete use of n$"), NULL, NULL);
229 return (NULL);
230 }
231 if (idx <= myargc) {
232 gargv = &myargv[idx - 1];
233 } else {
234 gargv = &myargv[myargc];
235 }
236 fmt += l + 1;
237 } else if (fargv != NULL) {
238 warnx1(_("incomplete use of n$"), NULL, NULL);
239 return (NULL);
240 }
241
242 if (getint(&fieldwidth))
243 return (NULL);
244 if (gargv > maxargv) {
245 maxargv = gargv;
246 }
247 havewidth = 1;
248
249 *dptr++ = '*';
250 *dptr = 0;
251 } else {
252 havewidth = 0;
253
254 /* skip to possible '.', get following precision */
255 while (isdigit(*fmt)) {
256 *dptr++ = *fmt++;
257 *dptr = 0;
258 }
259 }
260
261 if (*fmt == '.') {
262 /* precision present? */
263 fmt++;
264 *dptr++ = '.';
265
266 if (*fmt == '*') {
267
268 fmt++;
269 l = strspn(fmt, digits);
270 if ((l > 0) && (fmt[l] == '$')) {
271 int idx = atoi(fmt);
272 if (fargv == NULL) {
273 warnx1(_("incomplete use of n$"),
274 NULL, NULL);
275 return (NULL);
276 }
277 if (idx <= myargc) {
278 gargv = &myargv[idx - 1];
279 } else {
280 gargv = &myargv[myargc];
281 }
282 fmt += l + 1;
283 } else if (fargv != NULL) {
284 warnx1(_("incomplete use of n$"), NULL, NULL);
285 return (NULL);
286 }
287
288 if (getint(&precision))
289 return (NULL);
290 if (gargv > maxargv) {
291 maxargv = gargv;
292 }
293 haveprec = 1;
294 *dptr++ = '*';
295 *dptr = 0;
296 } else {
297 haveprec = 0;
298
299 /* skip to conversion char */
300 while (isdigit(*fmt)) {
301 *dptr++ = *fmt++;
302 *dptr = 0;
303 }
304 }
305 } else
306 haveprec = 0;
307 if (!*fmt) {
308 warnx1(_("missing format character"), NULL, NULL);
309 return (NULL);
310 }
311 *dptr++ = *fmt;
312 *dptr = 0;
313
314 /*
315 * Look for a length modifier. POSIX doesn't have these, so
316 * we only support them for floating-point conversions, which
317 * are extensions. This is useful because the L modifier can
318 * be used to gain extra range and precision, while omitting
319 * it is more likely to produce consistent results on different
320 * architectures. This is not so important for integers
321 * because overflow is the only bad thing that can happen to
322 * them, but consider the command printf %a 1.1
323 */
324 if (*fmt == 'L') {
325 mod_ldbl = 1;
326 fmt++;
327 if (!strchr("aAeEfFgG", *fmt)) {
328 warnx2(_("bad modifier L for %%%c"), *fmt, NULL);
329 return (NULL);
330 }
331 } else {
332 mod_ldbl = 0;
333 }
334
335 /* save the current arg offset, and set to the format arg */
336 if (fargv != NULL) {
337 gargv = fargv;
338 }
339
340 convch = *fmt;
341 nextch = *++fmt;
342
343 *fmt = '\0';
344 switch (convch) {
345 case 'b': {
346 size_t len;
347 char *p;
348 int getout;
349
350 p = strdup(getstr());
351 if (p == NULL) {
352 warnx2("%s", strerror(ENOMEM), NULL);
353 return (NULL);
354 }
355 getout = escape(p, 0, &len);
356 (void) fputs(p, stdout);
357 free(p);
358
359 if (getout)
360 exit(*rval);
361 break;
362 }
363 case 'c': {
364 char p;
365
366 p = getchr();
367 PF(start, p);
368 break;
369 }
370 case 's': {
371 const char *p;
372
373 p = getstr();
374 PF(start, p);
375 break;
376 }
377 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
378 char *f;
379 intmax_t val;
380 uintmax_t uval;
393 }
394 case 'e': case 'E':
395 case 'f': case 'F':
396 case 'g': case 'G':
397 case 'a': case 'A': {
398 long double p;
399
400 if (getfloating(&p, mod_ldbl))
401 *rval = 1;
402 if (mod_ldbl)
403 PF(start, p);
404 else
405 PF(start, (double)p);
406 break;
407 }
408 default:
409 warnx2(_("illegal format character %c"), convch, NULL);
410 return (NULL);
411 }
412 *fmt = nextch;
413
414 /* return the gargv to the next element */
415 return (fmt);
416 }
417
418 static char *
419 mknum(char *str, char ch)
420 {
421 static char *copy;
422 static size_t copy_size;
423 char *newcopy;
424 size_t len, newlen;
425
426 len = strlen(str) + 2;
427 if (len > copy_size) {
428 newlen = ((len + 1023) >> 10) << 10;
429 if ((newcopy = realloc(copy, newlen)) == NULL) {
430 warnx2("%s", strerror(ENOMEM), NULL);
431 return (NULL);
432 }
433 copy = newcopy;
434 copy_size = newlen;
452 *store = c;
453 continue;
454 }
455 switch (*++fmt) {
456 case '\0': /* EOS, user error */
457 *store = '\\';
458 *++store = '\0';
459 *len = PTRDIFF(store, save);
460 return (0);
461 case '\\': /* backslash */
462 case '\'': /* single quote */
463 *store = *fmt;
464 break;
465 case 'a': /* bell/alert */
466 *store = '\a';
467 break;
468 case 'b': /* backspace */
469 *store = '\b';
470 break;
471 case 'c':
472 if (!percent) {
473 *store = '\0';
474 *len = PTRDIFF(store, save);
475 return (1);
476 }
477 *store = 'c';
478 break;
479 case 'f': /* form-feed */
480 *store = '\f';
481 break;
482 case 'n': /* newline */
483 *store = '\n';
484 break;
485 case 'r': /* carriage-return */
486 *store = '\r';
487 break;
488 case 't': /* horizontal tab */
489 *store = '\t';
490 break;
491 case 'v': /* vertical tab */
492 *store = '\v';
493 break;
494 /* octal constant */
495 case '0': case '1': case '2': case '3':
496 case '4': case '5': case '6': case '7':
497 c = (!percent && *fmt == '0') ? 4 : 3;
498 for (value = 0;
|