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cce855bc JA |
1 | This file is printf.def, from which is created printf.c. |
2 | It implements the builtin "printf" in Bash. | |
3 | ||
4 | Copyright (C) 1997 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GNU Bash, the Bourne Again SHell. | |
7 | ||
8 | Bash is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
bb70624e | 10 | Software Foundation; either version 2, or (at your option) any later |
cce855bc JA |
11 | version. |
12 | ||
13 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License along | |
19 | with Bash; see the file COPYING. If not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA | |
21 | ||
22 | $PRODUCES printf.c | |
23 | ||
24 | $BUILTIN printf | |
25 | $FUNCTION printf_builtin | |
26 | $SHORT_DOC printf format [arguments] | |
27 | printf formats and prints ARGUMENTS under control of the FORMAT. FORMAT | |
28 | is a character string which contains three types of objects: plain | |
29 | characters, which are simply copied to standard output, character escape | |
30 | sequences which are converted and copied to the standard output, and | |
31 | format specifications, each of which causes printing of the next successive | |
32 | argument. In addition to the standard printf(1) formats, %b means to | |
33 | expand backslash escape sequences in the corresponding argument, and %q | |
34 | means to quote the argument in a way that can be reused as shell input. | |
35 | $END | |
36 | ||
37 | #include <config.h> | |
38 | ||
39 | #include "../bashtypes.h" | |
40 | ||
41 | #include <errno.h> | |
42 | #if defined (HAVE_LIMITS_H) | |
43 | # include <limits.h> | |
44 | #else | |
45 | /* Assume 32-bit ints and longs. */ | |
46 | # define LONG_MAX 2147483647L | |
47 | # define LONG_MIN (-2147483647L-1) | |
48 | # define INT_MAX 2147483647 | |
49 | # define INT_MIN (-2147483647-1) | |
50 | #endif | |
51 | ||
52 | #include <stdio.h> | |
53 | #include <ctype.h> | |
54 | ||
55 | #include "../bashansi.h" | |
56 | #include "../shell.h" | |
bb70624e | 57 | #include "stdc.h" |
cce855bc JA |
58 | #include "bashgetopt.h" |
59 | ||
60 | #if !defined (errno) | |
61 | extern int errno; | |
62 | #endif | |
63 | ||
64 | #define PF(f, func) \ | |
65 | do { \ | |
66 | if (fieldwidth && precision) \ | |
67 | (void)printf(f, fieldwidth, precision, func); \ | |
68 | else if (fieldwidth && precision == 0) \ | |
69 | (void)printf(f, fieldwidth, func); \ | |
70 | else if (precision) \ | |
71 | (void)printf(f, precision, func); \ | |
72 | else \ | |
73 | (void)printf(f, func); \ | |
74 | } while (0) | |
75 | ||
76 | #define PRETURN(value) \ | |
bb70624e | 77 | do { /* free (format); */ fflush (stdout); return (value); } while (0) |
cce855bc JA |
78 | |
79 | #define SKIP1 "#-+ 0" | |
80 | #define SKIP2 "*0123456789" | |
81 | ||
82 | static void printstr __P((char *, char *, int, int, int)); | |
bb70624e | 83 | static int tescape __P((char *, int, char *, int *)); |
cce855bc JA |
84 | static char *bexpand __P((char *, int, int *, int *)); |
85 | static char *mklong __P((char *, int)); | |
86 | static int getchr __P((void)); | |
87 | static char *getstr __P((void)); | |
88 | static int getint __P((void)); | |
89 | static int getlong __P((long *)); | |
90 | static int getulong __P((unsigned long *)); | |
91 | static double getdouble __P((void)); | |
92 | static int asciicode __P((void)); | |
93 | ||
94 | static WORD_LIST *garglist; | |
95 | static int retval; | |
96 | ||
97 | extern char *backslash_quote (); | |
98 | ||
99 | int | |
100 | printf_builtin (list) | |
101 | WORD_LIST *list; | |
102 | { | |
b72432fd | 103 | int ch, end, fieldwidth, precision, foundmod, fmtlen; |
cce855bc JA |
104 | char convch, nextch, *format, *fmt, *start; |
105 | ||
106 | retval = EXECUTION_SUCCESS; | |
107 | reset_internal_getopt (); | |
108 | while ((ch = internal_getopt (list, "")) != -1) | |
109 | { | |
110 | switch (ch) | |
111 | { | |
112 | case '?': | |
113 | default: | |
114 | builtin_usage(); | |
115 | return (EX_USAGE); | |
116 | } | |
117 | } | |
118 | list = loptend; | |
119 | ||
120 | if (list == 0) | |
121 | { | |
122 | builtin_usage (); | |
123 | return (EX_USAGE); | |
124 | } | |
125 | ||
126 | if (list->word->word == 0 || list->word->word[0] == '\0') | |
127 | return (EXECUTION_SUCCESS); | |
128 | ||
bb70624e | 129 | format = list->word->word; |
cce855bc JA |
130 | |
131 | garglist = list->next; | |
132 | ||
bc4cd23c | 133 | /* If the format string is empty after preprocessing, return immediately. */ |
bb70624e | 134 | if (format == 0 || *format == 0) |
bc4cd23c JA |
135 | return (EXECUTION_SUCCESS); |
136 | ||
cce855bc JA |
137 | /* Basic algorithm is to scan the format string for conversion |
138 | specifications -- once one is found, find out if the field | |
139 | width or precision is a '*'; if it is, gather up value. Note, | |
140 | format strings are reused as necessary to use up the provided | |
141 | arguments, arguments of zero/null string are provided to use | |
142 | up the format string. */ | |
143 | ||
144 | do | |
145 | { | |
146 | /* find next format specification */ | |
bb70624e | 147 | for (fmt = format; *fmt; fmt++) |
cce855bc JA |
148 | { |
149 | precision = fieldwidth = foundmod = 0; | |
150 | ||
bb70624e JA |
151 | if (*fmt == '\\') |
152 | { | |
153 | fmt++; | |
154 | /* A NULL third argument to tescape means to not do special | |
155 | processing for \c. */ | |
156 | fmt += tescape (fmt, 1, &nextch, (int *)NULL); | |
157 | putchar (nextch); | |
158 | fmt--; /* for loop will increment it for us again */ | |
159 | continue; | |
160 | } | |
161 | ||
cce855bc JA |
162 | if (*fmt != '%') |
163 | { | |
164 | putchar (*fmt); | |
165 | continue; | |
166 | } | |
167 | ||
168 | /* ASSERT(*fmt == '%') */ | |
169 | start = fmt++; | |
170 | ||
171 | if (*fmt == '%') /* %% prints a % */ | |
172 | { | |
173 | putchar ('%'); | |
174 | continue; | |
175 | } | |
176 | ||
177 | /* found format specification, skip to field width */ | |
178 | for (; *fmt && strchr(SKIP1, *fmt); ++fmt) | |
179 | ; | |
180 | fieldwidth = (*fmt == '*') ? getint () : 0; | |
181 | ||
182 | /* skip to possible '.', get following precision */ | |
183 | for (; *fmt && strchr(SKIP2, *fmt); ++fmt) | |
184 | ; | |
185 | if (*fmt == '.') | |
186 | { | |
187 | ++fmt; | |
188 | precision = (*fmt == '*') ? getint () : 0; | |
189 | } | |
190 | ||
191 | /* skip to conversion char */ | |
192 | for (; *fmt && strchr(SKIP2, *fmt); ++fmt) | |
193 | ; | |
cce855bc JA |
194 | |
195 | /* skip possible format modifiers */ | |
196 | if (*fmt == 'l' || *fmt == 'L' || *fmt == 'h') | |
197 | { | |
198 | fmt++; | |
199 | foundmod = 1; | |
200 | } | |
201 | ||
b72432fd JA |
202 | if (*fmt == 0) |
203 | { | |
204 | builtin_error ("`%s': missing format character", start); | |
205 | PRETURN (EXECUTION_FAILURE); | |
206 | } | |
207 | ||
cce855bc JA |
208 | convch = *fmt; |
209 | nextch = fmt[1]; | |
210 | fmt[1] = '\0'; | |
211 | switch(convch) | |
212 | { | |
213 | case 'c': | |
214 | { | |
215 | char p; | |
216 | ||
217 | p = getchr (); | |
218 | PF(start, p); | |
219 | break; | |
220 | } | |
221 | ||
222 | case 's': | |
223 | { | |
224 | char *p; | |
225 | ||
226 | p = getstr (); | |
227 | PF(start, p); | |
228 | break; | |
229 | } | |
230 | ||
231 | case 'b': /* expand escapes in argument */ | |
232 | { | |
233 | char *p, *xp; | |
234 | int rlen; | |
235 | ||
236 | p = getstr (); | |
237 | ch = rlen = 0; | |
238 | xp = bexpand (p, strlen (p), &ch, &rlen); | |
239 | ||
240 | if (xp) | |
241 | { | |
242 | /* Have to use printstr because of possible NUL bytes | |
243 | in XP -- printf does not handle that well. */ | |
244 | printstr (start, xp, rlen, fieldwidth, precision); | |
245 | free (xp); | |
246 | } | |
247 | ||
248 | if (ch) | |
249 | PRETURN (retval); | |
250 | break; | |
251 | } | |
252 | ||
253 | case 'q': /* print with shell quoting */ | |
254 | { | |
255 | char *p, *xp; | |
256 | ||
257 | p = getstr (); | |
258 | xp = backslash_quote (p); | |
259 | if (xp) | |
260 | { | |
261 | /* Use printstr to get fieldwidth and precision right. */ | |
262 | printstr (start, xp, strlen (xp), fieldwidth, precision); | |
263 | free (xp); | |
264 | } | |
265 | break; | |
266 | } | |
267 | ||
268 | case 'd': | |
269 | case 'i': | |
270 | { | |
271 | long p; | |
272 | char *f; | |
273 | ||
274 | if (foundmod == 0 && ((f = mklong (start, convch)) == NULL)) | |
275 | PRETURN (EXECUTION_FAILURE); | |
276 | else | |
277 | f = start; | |
278 | if (getlong (&p)) | |
279 | PRETURN (EXECUTION_FAILURE); | |
280 | PF(f, p); | |
281 | break; | |
282 | } | |
283 | ||
284 | case 'o': | |
285 | case 'u': | |
286 | case 'x': | |
287 | case 'X': | |
288 | { | |
289 | unsigned long p; | |
290 | char *f; | |
291 | ||
292 | if (foundmod == 0 && ((f = mklong (start, convch)) == NULL)) | |
293 | PRETURN (EXECUTION_FAILURE); | |
294 | else | |
295 | f = start; | |
296 | if (getulong (&p)) | |
297 | PRETURN (EXECUTION_FAILURE); | |
298 | PF (f, p); | |
299 | break; | |
300 | } | |
301 | ||
302 | case 'e': | |
303 | case 'E': | |
304 | case 'f': | |
305 | case 'g': | |
306 | case 'G': | |
307 | { | |
308 | double p; | |
309 | ||
310 | p = getdouble (); | |
311 | PF(start, p); | |
312 | break; | |
313 | } | |
314 | ||
bb70624e JA |
315 | /* We don't output unrecognized format characters; we print an |
316 | error message and return a failure exit status. */ | |
cce855bc | 317 | default: |
bb70624e | 318 | builtin_error ("`%c': invalid format character", convch); |
cce855bc JA |
319 | PRETURN (EXECUTION_FAILURE); |
320 | } | |
321 | ||
322 | fmt[1] = nextch; | |
323 | } | |
324 | } | |
bc4cd23c | 325 | while (garglist && garglist != list->next); |
cce855bc JA |
326 | |
327 | PRETURN (retval); | |
328 | } | |
329 | ||
330 | /* We duplicate a lot of what printf(3) does here. */ | |
331 | static void | |
332 | printstr (fmt, string, len, fieldwidth, precision) | |
333 | char *fmt; /* format */ | |
334 | char *string; /* expanded string argument */ | |
335 | int len; /* length of expanded string */ | |
336 | int fieldwidth; /* argument for width of `*' */ | |
337 | int precision; /* argument for precision of `*' */ | |
338 | { | |
339 | #if 0 | |
340 | char *s; | |
341 | #endif | |
342 | int padlen, nc, ljust, i; | |
343 | int fw, pr; /* fieldwidth and precision */ | |
344 | ||
345 | if (string == 0 || *string == '\0') | |
346 | return; | |
347 | ||
348 | #if 0 | |
349 | s = fmt; | |
350 | #endif | |
351 | if (*fmt == '%') | |
352 | fmt++; | |
353 | ||
354 | ljust = fw = pr = 0; | |
355 | ||
356 | /* skip flags */ | |
357 | while (*fmt == '#' || *fmt == '-' || *fmt == '+' || *fmt == ' ' || *fmt == '0') | |
358 | { | |
359 | if (*fmt == '-') | |
360 | ljust = 1; | |
361 | fmt++; | |
362 | } | |
363 | ||
364 | /* get fieldwidth, if present */ | |
365 | if (*fmt == '*') | |
366 | { | |
367 | fmt++; | |
368 | fw = fieldwidth; | |
369 | } | |
370 | else if (isdigit (*fmt)) | |
371 | { | |
372 | fw = *fmt++ - '0'; | |
373 | while (isdigit (*fmt)) | |
374 | fw = (fw * 10) + (*fmt++ - '0'); | |
375 | } | |
376 | ||
377 | /* get precision, if present */ | |
378 | if (*fmt == '.') | |
379 | { | |
380 | fmt++; | |
381 | if (*fmt == '*') | |
382 | { | |
383 | fmt++; | |
384 | pr = precision; | |
385 | } | |
386 | else if (isdigit (*fmt)) | |
387 | { | |
388 | pr = *fmt++ - '0'; | |
389 | while (isdigit (*fmt)) | |
390 | pr = (pr * 10) + (*fmt++ - '0'); | |
391 | } | |
392 | } | |
393 | ||
394 | #if 0 | |
395 | /* If we remove this, get rid of `s'. */ | |
396 | if (*fmt != 'b' && *fmt != 'q') | |
397 | { | |
398 | internal_error ("format parsing problem: %s", s); | |
399 | fw = pr = 0; | |
400 | } | |
401 | #endif | |
402 | ||
403 | /* chars from string to print */ | |
404 | nc = (pr > 0 && pr <= len) ? pr : len; | |
405 | ||
406 | padlen = fw - nc; | |
407 | if (padlen < 0) | |
408 | padlen = 0; | |
409 | if (ljust) | |
410 | padlen = -padlen; | |
411 | ||
412 | /* leading pad characters */ | |
413 | for (; padlen > 0; padlen--) | |
414 | putchar (' '); | |
415 | ||
416 | /* output NC characters from STRING */ | |
417 | for (i = 0; i < nc; i++) | |
418 | putchar (string[i]); | |
419 | ||
420 | /* output any necessary trailing padding */ | |
421 | for (; padlen < 0; padlen++) | |
422 | putchar (' '); | |
423 | } | |
424 | ||
425 | /* Convert STRING by expanding the escape sequences specified by the | |
426 | POSIX standard for printf's `%b' format string. If SAWC is non-null, | |
427 | recognize `\c' and use that as a string terminator. If we see \c, set | |
428 | *SAWC to 1 before returning. LEN is the length of STRING. */ | |
429 | ||
430 | #ifdef isoctal | |
431 | #undef isoctal | |
432 | #endif | |
433 | ||
434 | #define isoctal(c) ((c) >= '0' && (c) <= '7') | |
435 | ||
436 | #define OCTVALUE(c) ((c) - '0') | |
437 | ||
438 | #ifndef isxdigit | |
439 | # define isxdigit(c) (isdigit((c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F')) | |
440 | #endif | |
441 | ||
442 | #define HEXVALUE(c) \ | |
443 | ((c) >= 'a' && (c) <= 'f' ? (c)-'a'+10 : (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0') | |
bb70624e JA |
444 | |
445 | /* Translate a single backslash-escape sequence starting at ESTART (the | |
446 | character after the backslash) and return the number of characters | |
447 | consumed by the sequence. CP is the place to return the translated | |
448 | value. *SAWC is set to 1 if the escape sequence was \c, since that means | |
449 | to short-circuit the rest of the processing. If SAWC is null, we don't | |
450 | do the \c short-circuiting, and \c is treated as an unrecognized escape | |
451 | sequence. */ | |
452 | static int | |
453 | tescape (estart, trans_squote, cp, sawc) | |
454 | char *estart; | |
455 | int trans_squote; | |
456 | char *cp; | |
457 | int *sawc; | |
458 | { | |
459 | register char *p; | |
460 | int temp, c, evalue; | |
461 | ||
462 | p = estart; | |
463 | ||
464 | switch (c = *p++) | |
465 | { | |
466 | #if defined (__STDC__) | |
467 | case 'a': *cp = '\a'; break; | |
468 | #else | |
469 | case 'a': *cp = '\007'; break; | |
470 | #endif | |
471 | ||
472 | case 'b': *cp = '\b'; break; | |
473 | ||
474 | case 'e': *cp = '\033'; break; /* ESC -- non-ANSI */ | |
475 | ||
476 | case 'f': *cp = '\f'; break; | |
477 | ||
478 | case 'n': *cp = '\n'; break; | |
479 | ||
480 | case 'r': *cp = '\r'; break; | |
481 | ||
482 | case 't': *cp = '\t'; break; | |
483 | ||
484 | case 'v': *cp = '\v'; break; | |
485 | ||
486 | /* %b octal constants are `\0' followed by one, two, or three | |
487 | octal digits... */ | |
488 | case '0': | |
489 | for (temp = 3, evalue = 0; isoctal (*p) && temp--; p++) | |
490 | evalue = (evalue * 8) + OCTVALUE (*p); | |
491 | *cp = evalue; | |
492 | break; | |
493 | ||
494 | /* but, as an extension, the other echo-like octal escape | |
495 | sequences are supported as well. */ | |
496 | case '1': case '2': case '3': case '4': | |
497 | case '5': case '6': case '7': | |
498 | for (temp = 2, evalue = c - '0'; isoctal (*p) && temp--; p++) | |
499 | evalue = (evalue * 8) + OCTVALUE (*p); | |
500 | *cp = evalue; | |
501 | break; | |
502 | ||
503 | /* And, as another extension, we allow \xNNN, where each N is a | |
504 | hex digit. */ | |
505 | case 'x': | |
506 | for (temp = 3, evalue = 0; isxdigit (*p) && temp--; p++) | |
507 | evalue = (evalue * 16) + HEXVALUE (*p); | |
508 | if (temp == 3) | |
509 | { | |
510 | builtin_error ("missing hex digit for \\x"); | |
511 | *cp = '\\'; | |
512 | return 0; | |
513 | } | |
514 | *cp = evalue; | |
515 | break; | |
516 | ||
517 | case '\\': /* \\ -> \ */ | |
518 | *cp = c; | |
519 | break; | |
520 | ||
521 | case '\'': /* TRANS_SQUOTE != 0 means \' -> ' */ | |
522 | if (trans_squote) | |
523 | *cp = c; | |
524 | else | |
525 | { | |
526 | *cp = '\\'; | |
527 | return 0; | |
528 | } | |
529 | break; | |
530 | ||
531 | case 'c': | |
532 | if (sawc) | |
533 | { | |
534 | *sawc = 1; | |
535 | break; | |
536 | } | |
537 | /* other backslash escapes are passed through unaltered */ | |
538 | default: | |
539 | *cp = '\\'; | |
540 | return 0; | |
541 | } | |
542 | return (p - estart); | |
543 | } | |
544 | ||
cce855bc JA |
545 | static char * |
546 | bexpand (string, len, sawc, lenp) | |
547 | char *string; | |
548 | int len, *sawc, *lenp; | |
549 | { | |
bb70624e JA |
550 | int temp; |
551 | char *ret, *r, *s, c; | |
cce855bc JA |
552 | |
553 | if (string == 0 || *string == '\0') | |
554 | { | |
555 | if (sawc) | |
556 | *sawc = 0; | |
557 | if (lenp) | |
558 | *lenp = 0; | |
559 | return ((char *)NULL); | |
560 | } | |
561 | ||
562 | ret = xmalloc (len + 1); | |
563 | for (r = ret, s = string; s && *s; ) | |
564 | { | |
565 | c = *s++; | |
566 | if (c != '\\' || *s == '\0') | |
567 | { | |
568 | *r++ = c; | |
569 | continue; | |
570 | } | |
bb70624e JA |
571 | temp = 0; |
572 | s += tescape (s, 0, &c, &temp); | |
573 | if (temp) | |
cce855bc | 574 | { |
cce855bc JA |
575 | if (sawc) |
576 | *sawc = 1; | |
bb70624e | 577 | break; |
cce855bc JA |
578 | } |
579 | ||
580 | *r++ = c; | |
581 | } | |
582 | ||
583 | *r = '\0'; | |
584 | if (lenp) | |
585 | *lenp = r - ret; | |
586 | return ret; | |
587 | } | |
588 | ||
589 | static char * | |
590 | mklong (str, ch) | |
591 | char *str; | |
592 | int ch; | |
593 | { | |
594 | static char copy[64]; | |
595 | int len; | |
596 | ||
597 | len = strlen (str) + 2; | |
598 | FASTCOPY (str, copy, len - 3); | |
599 | copy[len - 3] = 'l'; | |
600 | copy[len - 2] = ch; | |
601 | copy[len - 1] = '\0'; | |
602 | return (copy); | |
603 | } | |
604 | ||
605 | static int | |
606 | getchr () | |
607 | { | |
608 | int ret; | |
609 | ||
610 | if (garglist == 0) | |
611 | return ('\0'); | |
612 | ||
613 | ret = (int)garglist->word->word[0]; | |
614 | garglist = garglist->next; | |
615 | return ret; | |
616 | } | |
617 | ||
618 | static char * | |
619 | getstr () | |
620 | { | |
621 | char *ret; | |
622 | ||
623 | if (garglist == 0) | |
624 | return (""); | |
625 | ||
626 | ret = garglist->word->word; | |
627 | garglist = garglist->next; | |
628 | return ret; | |
629 | } | |
630 | ||
631 | static int | |
632 | getint () | |
633 | { | |
634 | long ret; | |
635 | ||
636 | if (getlong (&ret)) | |
637 | return (0); | |
638 | ||
639 | if (ret > INT_MAX) | |
640 | { | |
641 | builtin_error ("%s: %s", garglist->word->word, strerror(ERANGE)); | |
642 | return (0); | |
643 | } | |
644 | ||
645 | return ((int)ret); | |
646 | } | |
647 | ||
648 | static int | |
649 | getlong (lp) | |
650 | long *lp; | |
651 | { | |
652 | long ret; | |
bb70624e | 653 | char *ep; |
cce855bc JA |
654 | |
655 | if (garglist == 0) | |
656 | { | |
657 | *lp = 0L; | |
658 | return (0); | |
659 | } | |
660 | ||
661 | if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"') | |
662 | { | |
663 | *lp = (long)asciicode (); | |
664 | return (0); | |
665 | } | |
666 | ||
667 | errno = 0; | |
bb70624e JA |
668 | /* If we use 0 as the third argument, we can handle octal and hex, which |
669 | legal_number does not. (This was | |
670 | if (legal_number (garglist->word->word, &ret) == 0) | |
671 | ) */ | |
672 | ret = strtol (garglist->word->word, &ep, 0); | |
673 | if (*ep != '\0') | |
cce855bc | 674 | { |
bb70624e | 675 | builtin_error ("%s: invalid number", garglist->word->word); |
cce855bc JA |
676 | return (1); |
677 | } | |
678 | else if (errno == ERANGE) | |
679 | { | |
680 | builtin_error ("%s: %s", garglist->word->word, strerror(ERANGE)); | |
681 | return (1); | |
682 | } | |
683 | ||
684 | *lp = ret; | |
685 | garglist = garglist->next; | |
686 | return (0); | |
687 | } | |
688 | ||
689 | static int | |
690 | getulong (ulp) | |
691 | unsigned long *ulp; | |
692 | { | |
693 | unsigned long ret; | |
694 | char *ep; | |
695 | ||
696 | if (garglist == 0) | |
697 | { | |
698 | *ulp = (unsigned long)0; | |
699 | return (0); | |
700 | } | |
701 | ||
702 | if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"') | |
703 | { | |
704 | *ulp = (unsigned long)asciicode (); | |
705 | return (0); | |
706 | } | |
707 | ||
708 | errno = 0; | |
709 | ret = strtoul (garglist->word->word, &ep, 0); | |
710 | ||
711 | if (*ep) | |
712 | { | |
bb70624e | 713 | builtin_error ("%s: invalid number", garglist->word->word); |
cce855bc JA |
714 | return (1); |
715 | } | |
716 | else if (errno == ERANGE) | |
717 | { | |
718 | builtin_error ("%s: %s", garglist->word->word, strerror(ERANGE)); | |
719 | return (1); | |
720 | } | |
721 | ||
722 | *ulp = ret; | |
723 | garglist = garglist->next; | |
724 | return (0); | |
725 | } | |
726 | ||
727 | static double | |
728 | getdouble () | |
729 | { | |
730 | double ret; | |
731 | ||
732 | if (garglist == 0) | |
733 | return ((double)0); | |
734 | ||
735 | if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"') | |
736 | return ((double)asciicode ()); | |
737 | ||
738 | /* This should use strtod if it is available. */ | |
739 | ret = atof (garglist->word->word); | |
740 | garglist = garglist->next; | |
741 | return (ret); | |
742 | } | |
743 | ||
744 | /* NO check is needed for garglist here. */ | |
745 | static int | |
746 | asciicode () | |
747 | { | |
748 | register int ch; | |
749 | ||
750 | ch = garglist->word->word[1]; | |
751 | garglist = garglist->next; | |
752 | return (ch); | |
753 | } |