File: | src/lib/libc/stdio/vfwscanf.c |
Warning: | line 487, column 5 Value stored to 'p0' is never read |
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1 | /* $OpenBSD: vfwscanf.c,v 1.8 2022/12/27 17:10:06 jmc Exp $ */ |
2 | /*- |
3 | * Copyright (c) 1990, 1993 |
4 | * The Regents of the University of California. All rights reserved. |
5 | * |
6 | * This code is derived from software contributed to Berkeley by |
7 | * Chris Torek. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. 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. |
20 | * |
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 |
31 | * SUCH DAMAGE. |
32 | */ |
33 | |
34 | #include <inttypes.h> |
35 | #include <limits.h> |
36 | #include <locale.h> |
37 | #include <stdarg.h> |
38 | #include <stddef.h> |
39 | #include <stdio.h> |
40 | #include <stdlib.h> |
41 | #include <string.h> |
42 | #include <wctype.h> |
43 | #include "local.h" |
44 | |
45 | #ifdef FLOATING_POINT1 |
46 | #include <float.h> |
47 | #include "floatio.h" |
48 | #endif |
49 | |
50 | #define BUF513 513 /* Maximum length of numeric string. */ |
51 | |
52 | /* |
53 | * Flags used during conversion. |
54 | */ |
55 | #define LONG0x00001 0x00001 /* l: long or double */ |
56 | #define LONGDBL0x00002 0x00002 /* L: long double */ |
57 | #define SHORT0x00004 0x00004 /* h: short */ |
58 | #define SHORTSHORT0x00008 0x00008 /* hh: 8 bit integer */ |
59 | #define LLONG0x00010 0x00010 /* ll: long long (+ deprecated q: quad) */ |
60 | #define POINTER0x00020 0x00020 /* p: void * (as hex) */ |
61 | #define SIZEINT0x00040 0x00040 /* z: (signed) size_t */ |
62 | #define MAXINT0x00080 0x00080 /* j: intmax_t */ |
63 | #define PTRINT0x00100 0x00100 /* t: ptrdiff_t */ |
64 | #define NOSKIP0x00200 0x00200 /* [ or c: do not skip blanks */ |
65 | #define SUPPRESS0x00400 0x00400 /* *: suppress assignment */ |
66 | #define UNSIGNED0x00800 0x00800 /* %[oupxX] conversions */ |
67 | |
68 | /* |
69 | * The following are used in numeric conversions only: |
70 | * SIGNOK, HAVESIGN, NDIGITS, DPTOK, and EXPOK are for floating point; |
71 | * SIGNOK, HAVESIGN, NDIGITS, PFXOK, and NZDIGITS are for integral. |
72 | */ |
73 | #define SIGNOK0x01000 0x01000 /* +/- is (still) legal */ |
74 | #define HAVESIGN0x02000 0x02000 /* sign detected */ |
75 | #define NDIGITS0x04000 0x04000 /* no digits detected */ |
76 | |
77 | #define DPTOK0x08000 0x08000 /* (float) decimal point is still legal */ |
78 | #define EXPOK0x10000 0x10000 /* (float) exponent (e+3, etc) still legal */ |
79 | |
80 | #define PFXOK0x08000 0x08000 /* 0x prefix is (still) legal */ |
81 | #define NZDIGITS0x10000 0x10000 /* no zero digits detected */ |
82 | |
83 | /* |
84 | * Conversion types. |
85 | */ |
86 | #define CT_CHAR0 0 /* %c conversion */ |
87 | #define CT_CCL1 1 /* %[...] conversion */ |
88 | #define CT_STRING2 2 /* %s conversion */ |
89 | #define CT_INT3 3 /* integer, i.e., strtoimax or strtoumax */ |
90 | #define CT_FLOAT4 4 /* floating, i.e., strtod */ |
91 | |
92 | #define u_charunsigned char unsigned char |
93 | #define u_longunsigned long unsigned long |
94 | |
95 | #define INCCL(_c)(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == ((void *)0)) : (wmemchr(ccls, (_c), ccle - ccls) != ((void *)0))) \ |
96 | (cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL((void *)0)) : \ |
97 | (wmemchr(ccls, (_c), ccle - ccls) != NULL((void *)0))) |
98 | |
99 | /* |
100 | * vfwscanf |
101 | */ |
102 | int |
103 | __vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, __va_list ap) |
104 | { |
105 | wint_t c; /* character from format, or conversion */ |
106 | size_t width; /* field width, or 0 */ |
107 | wchar_t *p; /* points into all kinds of strings */ |
108 | int n; /* handy integer */ |
109 | int flags; /* flags as defined above */ |
110 | wchar_t *p0; /* saves original value of p when necessary */ |
111 | int nassigned; /* number of fields assigned */ |
112 | int nconversions; /* number of conversions */ |
113 | int nread; /* number of characters consumed from fp */ |
114 | int base; /* base argument to strtoimax/strtouimax */ |
115 | wchar_t buf[BUF513]; /* buffer for numeric conversions */ |
116 | const wchar_t *ccls; /* character class start */ |
117 | const wchar_t *ccle; /* character class end */ |
118 | int cclcompl; /* ccl is complemented? */ |
119 | wint_t wi; /* handy wint_t */ |
120 | char *mbp; /* multibyte string pointer for %c %s %[ */ |
121 | size_t nconv; /* number of bytes in mb. conversion */ |
122 | char mbbuf[MB_LEN_MAX4]; /* temporary mb. character buffer */ |
123 | mbstate_t mbs; |
124 | #ifdef FLOATING_POINT1 |
125 | wchar_t decimal_point = 0; |
126 | #endif |
127 | |
128 | /* `basefix' is used to avoid `if' tests in the integer scanner */ |
129 | static short basefix[17] = |
130 | { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; |
131 | |
132 | _SET_ORIENTATION(fp, 1)do { struct wchar_io_data *_wcio = (((struct __sfileext *)((fp )->_ext._base)) ? &(((struct __sfileext *)((fp)->_ext ._base))->_wcio) : (struct wchar_io_data *)0); if (_wcio && _wcio->wcio_mode == 0) _wcio->wcio_mode = (1);} while ( 0); |
133 | |
134 | nassigned = 0; |
135 | nconversions = 0; |
136 | nread = 0; |
137 | base = 0; /* XXX just to keep gcc happy */ |
138 | ccls = ccle = NULL((void *)0); |
139 | for (;;) { |
140 | c = *fmt++; |
141 | if (c == 0) { |
142 | return (nassigned); |
143 | } |
144 | if (iswspace(c)) { |
145 | while ((c = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
146 | iswspace(c)) |
147 | ; |
148 | if (c != WEOF((wint_t)-1)) |
149 | __ungetwc(c, fp); |
150 | continue; |
151 | } |
152 | if (c != '%') |
153 | goto literal; |
154 | width = 0; |
155 | flags = 0; |
156 | /* |
157 | * switch on the format. continue if done; |
158 | * break once format type is derived. |
159 | */ |
160 | again: c = *fmt++; |
161 | switch (c) { |
162 | case '%': |
163 | literal: |
164 | if ((wi = __fgetwc_unlock(fp)) == WEOF((wint_t)-1)) |
165 | goto input_failure; |
166 | if (wi != c) { |
167 | __ungetwc(wi, fp); |
168 | goto match_failure; |
169 | } |
170 | nread++; |
171 | continue; |
172 | |
173 | case '*': |
174 | flags |= SUPPRESS0x00400; |
175 | goto again; |
176 | case 'j': |
177 | flags |= MAXINT0x00080; |
178 | goto again; |
179 | case 'L': |
180 | flags |= LONGDBL0x00002; |
181 | goto again; |
182 | case 'h': |
183 | if (*fmt == 'h') { |
184 | fmt++; |
185 | flags |= SHORTSHORT0x00008; |
186 | } else { |
187 | flags |= SHORT0x00004; |
188 | } |
189 | goto again; |
190 | case 'l': |
191 | if (*fmt == 'l') { |
192 | fmt++; |
193 | flags |= LLONG0x00010; |
194 | } else { |
195 | flags |= LONG0x00001; |
196 | } |
197 | goto again; |
198 | case 'q': |
199 | flags |= LLONG0x00010; /* deprecated */ |
200 | goto again; |
201 | case 't': |
202 | flags |= PTRINT0x00100; |
203 | goto again; |
204 | case 'z': |
205 | flags |= SIZEINT0x00040; |
206 | goto again; |
207 | |
208 | case '0': case '1': case '2': case '3': case '4': |
209 | case '5': case '6': case '7': case '8': case '9': |
210 | width = width * 10 + c - '0'; |
211 | goto again; |
212 | |
213 | /* |
214 | * Conversions. |
215 | * Those marked `compat' are for 4.[123]BSD compatibility. |
216 | * |
217 | * (According to ANSI, E and X formats are supposed |
218 | * to the same as e and x. Sorry about that.) |
219 | */ |
220 | case 'D': /* compat */ |
221 | flags |= LONG0x00001; |
222 | /* FALLTHROUGH */ |
223 | case 'd': |
224 | c = CT_INT3; |
225 | base = 10; |
226 | break; |
227 | |
228 | case 'i': |
229 | c = CT_INT3; |
230 | base = 0; |
231 | break; |
232 | |
233 | case 'O': /* compat */ |
234 | flags |= LONG0x00001; |
235 | /* FALLTHROUGH */ |
236 | case 'o': |
237 | c = CT_INT3; |
238 | flags |= UNSIGNED0x00800; |
239 | base = 8; |
240 | break; |
241 | |
242 | case 'u': |
243 | c = CT_INT3; |
244 | flags |= UNSIGNED0x00800; |
245 | base = 10; |
246 | break; |
247 | |
248 | case 'X': |
249 | case 'x': |
250 | flags |= PFXOK0x08000; /* enable 0x prefixing */ |
251 | c = CT_INT3; |
252 | flags |= UNSIGNED0x00800; |
253 | base = 16; |
254 | break; |
255 | |
256 | #ifdef FLOATING_POINT1 |
257 | case 'e': case 'E': |
258 | case 'f': case 'F': |
259 | case 'g': case 'G': |
260 | case 'a': case 'A': |
261 | c = CT_FLOAT4; |
262 | break; |
263 | #endif |
264 | |
265 | case 's': |
266 | c = CT_STRING2; |
267 | break; |
268 | |
269 | case '[': |
270 | ccls = fmt; |
271 | if (*fmt == '^') { |
272 | cclcompl = 1; |
273 | fmt++; |
274 | } else |
275 | cclcompl = 0; |
276 | if (*fmt == ']') |
277 | fmt++; |
278 | while (*fmt != '\0' && *fmt != ']') |
279 | fmt++; |
280 | ccle = fmt; |
281 | fmt++; |
282 | flags |= NOSKIP0x00200; |
283 | c = CT_CCL1; |
284 | break; |
285 | |
286 | case 'c': |
287 | flags |= NOSKIP0x00200; |
288 | c = CT_CHAR0; |
289 | break; |
290 | |
291 | case 'p': /* pointer format is like hex */ |
292 | flags |= POINTER0x00020 | PFXOK0x08000; |
293 | c = CT_INT3; |
294 | flags |= UNSIGNED0x00800; |
295 | base = 16; |
296 | break; |
297 | |
298 | case 'n': |
299 | nconversions++; |
300 | if (flags & SUPPRESS0x00400) |
301 | continue; |
302 | if (flags & SHORTSHORT0x00008) |
303 | *va_arg(ap, signed char *)__builtin_va_arg((ap), signed char *) = nread; |
304 | else if (flags & SHORT0x00004) |
305 | *va_arg(ap, short *)__builtin_va_arg((ap), short *) = nread; |
306 | else if (flags & LONG0x00001) |
307 | *va_arg(ap, long *)__builtin_va_arg((ap), long *) = nread; |
308 | else if (flags & SIZEINT0x00040) |
309 | *va_arg(ap, ssize_t *)__builtin_va_arg((ap), ssize_t *) = nread; |
310 | else if (flags & PTRINT0x00100) |
311 | *va_arg(ap, ptrdiff_t *)__builtin_va_arg((ap), ptrdiff_t *) = nread; |
312 | else if (flags & LLONG0x00010) |
313 | *va_arg(ap, long long *)__builtin_va_arg((ap), long long *) = nread; |
314 | else if (flags & MAXINT0x00080) |
315 | *va_arg(ap, intmax_t *)__builtin_va_arg((ap), intmax_t *) = nread; |
316 | else |
317 | *va_arg(ap, int *)__builtin_va_arg((ap), int *) = nread; |
318 | continue; |
319 | |
320 | /* |
321 | * Disgusting backwards compatibility hacks. XXX |
322 | */ |
323 | case '\0': /* compat */ |
324 | return (EOF(-1)); |
325 | |
326 | default: /* compat */ |
327 | if (iswupper(c)) |
328 | flags |= LONG0x00001; |
329 | c = CT_INT3; |
330 | base = 10; |
331 | break; |
332 | } |
333 | |
334 | /* |
335 | * Consume leading white space, except for formats |
336 | * that suppress this. |
337 | */ |
338 | if ((flags & NOSKIP0x00200) == 0) { |
339 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
340 | iswspace(wi)) |
341 | nread++; |
342 | if (wi == WEOF((wint_t)-1)) |
343 | goto input_failure; |
344 | __ungetwc(wi, fp); |
345 | } |
346 | |
347 | /* |
348 | * Do the conversion. |
349 | */ |
350 | switch (c) { |
351 | |
352 | case CT_CHAR0: |
353 | /* scan arbitrary characters (sets NOSKIP) */ |
354 | if (width == 0) |
355 | width = 1; |
356 | if (flags & LONG0x00001) { |
357 | if (!(flags & SUPPRESS0x00400)) |
358 | p = va_arg(ap, wchar_t *)__builtin_va_arg((ap), wchar_t *); |
359 | n = 0; |
360 | while (width-- != 0 && |
361 | (wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1)) { |
362 | if (!(flags & SUPPRESS0x00400)) |
363 | *p++ = (wchar_t)wi; |
364 | n++; |
365 | } |
366 | if (n == 0) |
367 | goto input_failure; |
368 | nread += n; |
369 | if (!(flags & SUPPRESS0x00400)) |
370 | nassigned++; |
371 | } else { |
372 | if (!(flags & SUPPRESS0x00400)) |
373 | mbp = va_arg(ap, char *)__builtin_va_arg((ap), char *); |
374 | n = 0; |
375 | bzero(&mbs, sizeof(mbs)); |
376 | while (width != 0 && |
377 | (wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1)) { |
378 | if (width >= MB_CUR_MAX__mb_cur_max() && |
379 | !(flags & SUPPRESS0x00400)) { |
380 | nconv = wcrtomb(mbp, wi, &mbs); |
381 | if (nconv == (size_t)-1) |
382 | goto input_failure; |
383 | } else { |
384 | nconv = wcrtomb(mbbuf, wi, |
385 | &mbs); |
386 | if (nconv == (size_t)-1) |
387 | goto input_failure; |
388 | if (nconv > width) { |
389 | __ungetwc(wi, fp); |
390 | break; |
391 | } |
392 | if (!(flags & SUPPRESS0x00400)) |
393 | memcpy(mbp, mbbuf, |
394 | nconv); |
395 | } |
396 | if (!(flags & SUPPRESS0x00400)) |
397 | mbp += nconv; |
398 | width -= nconv; |
399 | n++; |
400 | } |
401 | if (n == 0) |
402 | goto input_failure; |
403 | nread += n; |
404 | if (!(flags & SUPPRESS0x00400)) |
405 | nassigned++; |
406 | } |
407 | nconversions++; |
408 | break; |
409 | |
410 | case CT_CCL1: |
411 | /* scan a (nonempty) character class (sets NOSKIP) */ |
412 | if (width == 0) |
413 | width = (size_t)~0; /* `infinity' */ |
414 | /* take only those things in the class */ |
415 | if ((flags & SUPPRESS0x00400) && (flags & LONG0x00001)) { |
416 | n = 0; |
417 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
418 | width-- != 0 && INCCL(wi)(cclcompl ? (wmemchr(ccls, (wi), ccle - ccls) == ((void *)0)) : (wmemchr(ccls, (wi), ccle - ccls) != ((void *)0)))) |
419 | n++; |
420 | if (wi != WEOF((wint_t)-1)) |
421 | __ungetwc(wi, fp); |
422 | if (n == 0) |
423 | goto match_failure; |
424 | } else if (flags & LONG0x00001) { |
425 | p0 = p = va_arg(ap, wchar_t *)__builtin_va_arg((ap), wchar_t *); |
426 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
427 | width-- != 0 && INCCL(wi)(cclcompl ? (wmemchr(ccls, (wi), ccle - ccls) == ((void *)0)) : (wmemchr(ccls, (wi), ccle - ccls) != ((void *)0)))) |
428 | *p++ = (wchar_t)wi; |
429 | if (wi != WEOF((wint_t)-1)) |
430 | __ungetwc(wi, fp); |
431 | n = p - p0; |
432 | if (n == 0) |
433 | goto match_failure; |
434 | *p = 0; |
435 | nassigned++; |
436 | } else { |
437 | if (!(flags & SUPPRESS0x00400)) |
438 | mbp = va_arg(ap, char *)__builtin_va_arg((ap), char *); |
439 | n = 0; |
440 | bzero(&mbs, sizeof(mbs)); |
441 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
442 | width != 0 && INCCL(wi)(cclcompl ? (wmemchr(ccls, (wi), ccle - ccls) == ((void *)0)) : (wmemchr(ccls, (wi), ccle - ccls) != ((void *)0)))) { |
443 | if (width >= MB_CUR_MAX__mb_cur_max() && |
444 | !(flags & SUPPRESS0x00400)) { |
445 | nconv = wcrtomb(mbp, wi, &mbs); |
446 | if (nconv == (size_t)-1) |
447 | goto input_failure; |
448 | } else { |
449 | nconv = wcrtomb(mbbuf, wi, |
450 | &mbs); |
451 | if (nconv == (size_t)-1) |
452 | goto input_failure; |
453 | if (nconv > width) |
454 | break; |
455 | if (!(flags & SUPPRESS0x00400)) |
456 | memcpy(mbp, mbbuf, |
457 | nconv); |
458 | } |
459 | if (!(flags & SUPPRESS0x00400)) |
460 | mbp += nconv; |
461 | width -= nconv; |
462 | n++; |
463 | } |
464 | if (wi != WEOF((wint_t)-1)) |
465 | __ungetwc(wi, fp); |
466 | if (!(flags & SUPPRESS0x00400)) { |
467 | *mbp = 0; |
468 | nassigned++; |
469 | } |
470 | } |
471 | nread += n; |
472 | nconversions++; |
473 | break; |
474 | |
475 | case CT_STRING2: |
476 | /* like CCL, but zero-length string OK, & no NOSKIP */ |
477 | if (width == 0) |
478 | width = (size_t)~0; |
479 | if ((flags & SUPPRESS0x00400) && (flags & LONG0x00001)) { |
480 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
481 | width-- != 0 && |
482 | !iswspace(wi)) |
483 | nread++; |
484 | if (wi != WEOF((wint_t)-1)) |
485 | __ungetwc(wi, fp); |
486 | } else if (flags & LONG0x00001) { |
487 | p0 = p = va_arg(ap, wchar_t *)__builtin_va_arg((ap), wchar_t *); |
Value stored to 'p0' is never read | |
488 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
489 | width-- != 0 && |
490 | !iswspace(wi)) { |
491 | *p++ = (wchar_t)wi; |
492 | nread++; |
493 | } |
494 | if (wi != WEOF((wint_t)-1)) |
495 | __ungetwc(wi, fp); |
496 | *p = 0; |
497 | nassigned++; |
498 | } else { |
499 | if (!(flags & SUPPRESS0x00400)) |
500 | mbp = va_arg(ap, char *)__builtin_va_arg((ap), char *); |
501 | bzero(&mbs, sizeof(mbs)); |
502 | while ((wi = __fgetwc_unlock(fp)) != WEOF((wint_t)-1) && |
503 | width != 0 && |
504 | !iswspace(wi)) { |
505 | if (width >= MB_CUR_MAX__mb_cur_max() && |
506 | !(flags & SUPPRESS0x00400)) { |
507 | nconv = wcrtomb(mbp, wi, &mbs); |
508 | if (nconv == (size_t)-1) |
509 | goto input_failure; |
510 | } else { |
511 | nconv = wcrtomb(mbbuf, wi, |
512 | &mbs); |
513 | if (nconv == (size_t)-1) |
514 | goto input_failure; |
515 | if (nconv > width) |
516 | break; |
517 | if (!(flags & SUPPRESS0x00400)) |
518 | memcpy(mbp, mbbuf, |
519 | nconv); |
520 | } |
521 | if (!(flags & SUPPRESS0x00400)) |
522 | mbp += nconv; |
523 | width -= nconv; |
524 | nread++; |
525 | } |
526 | if (wi != WEOF((wint_t)-1)) |
527 | __ungetwc(wi, fp); |
528 | if (!(flags & SUPPRESS0x00400)) { |
529 | *mbp = 0; |
530 | nassigned++; |
531 | } |
532 | } |
533 | nconversions++; |
534 | continue; |
535 | |
536 | case CT_INT3: |
537 | /* scan an integer as if by strtoimax/strtoumax */ |
538 | if (width == 0 || width > sizeof(buf) / |
539 | sizeof(*buf) - 1) |
540 | width = sizeof(buf) / sizeof(*buf) - 1; |
541 | flags |= SIGNOK0x01000 | NDIGITS0x04000 | NZDIGITS0x10000; |
542 | for (p = buf; width; width--) { |
543 | c = __fgetwc_unlock(fp); |
544 | /* |
545 | * Switch on the character; `goto ok' |
546 | * if we accept it as a part of number. |
547 | */ |
548 | switch (c) { |
549 | |
550 | /* |
551 | * The digit 0 is always legal, but is |
552 | * special. For %i conversions, if no |
553 | * digits (zero or nonzero) have been |
554 | * scanned (only signs), we will have |
555 | * base==0. In that case, we should set |
556 | * it to 8 and enable 0x prefixing. |
557 | * Also, if we have not scanned zero digits |
558 | * before this, do not turn off prefixing |
559 | * (someone else will turn it off if we |
560 | * have scanned any nonzero digits). |
561 | */ |
562 | case '0': |
563 | if (base == 0) { |
564 | base = 8; |
565 | flags |= PFXOK0x08000; |
566 | } |
567 | if (flags & NZDIGITS0x10000) |
568 | flags &= ~(SIGNOK0x01000|NZDIGITS0x10000|NDIGITS0x04000); |
569 | else |
570 | flags &= ~(SIGNOK0x01000|PFXOK0x08000|NDIGITS0x04000); |
571 | goto ok; |
572 | |
573 | /* 1 through 7 always legal */ |
574 | case '1': case '2': case '3': |
575 | case '4': case '5': case '6': case '7': |
576 | base = basefix[base]; |
577 | flags &= ~(SIGNOK0x01000 | PFXOK0x08000 | NDIGITS0x04000); |
578 | goto ok; |
579 | |
580 | /* digits 8 and 9 ok iff decimal or hex */ |
581 | case '8': case '9': |
582 | base = basefix[base]; |
583 | if (base <= 8) |
584 | break; /* not legal here */ |
585 | flags &= ~(SIGNOK0x01000 | PFXOK0x08000 | NDIGITS0x04000); |
586 | goto ok; |
587 | |
588 | /* letters ok iff hex */ |
589 | case 'A': case 'B': case 'C': |
590 | case 'D': case 'E': case 'F': |
591 | case 'a': case 'b': case 'c': |
592 | case 'd': case 'e': case 'f': |
593 | /* no need to fix base here */ |
594 | if (base <= 10) |
595 | break; /* not legal here */ |
596 | flags &= ~(SIGNOK0x01000 | PFXOK0x08000 | NDIGITS0x04000); |
597 | goto ok; |
598 | |
599 | /* sign ok only as first character */ |
600 | case '+': case '-': |
601 | if (flags & SIGNOK0x01000) { |
602 | flags &= ~SIGNOK0x01000; |
603 | flags |= HAVESIGN0x02000; |
604 | goto ok; |
605 | } |
606 | break; |
607 | |
608 | /* |
609 | * x ok iff flag still set and 2nd char (or |
610 | * 3rd char if we have a sign). |
611 | */ |
612 | case 'x': case 'X': |
613 | if ((flags & PFXOK0x08000) && p == |
614 | buf + 1 + !!(flags & HAVESIGN0x02000)) { |
615 | base = 16; /* if %i */ |
616 | flags &= ~PFXOK0x08000; |
617 | goto ok; |
618 | } |
619 | break; |
620 | } |
621 | |
622 | /* |
623 | * If we got here, c is not a legal character |
624 | * for a number. Stop accumulating digits. |
625 | */ |
626 | if (c != WEOF((wint_t)-1)) |
627 | __ungetwc(c, fp); |
628 | break; |
629 | ok: |
630 | /* |
631 | * c is legal: store it and look at the next. |
632 | */ |
633 | *p++ = (wchar_t)c; |
634 | } |
635 | /* |
636 | * If we had only a sign, it is no good; push |
637 | * back the sign. If the number ends in `x', |
638 | * it was [sign] '0' 'x', so push back the x |
639 | * and treat it as [sign] '0'. |
640 | */ |
641 | if (flags & NDIGITS0x04000) { |
642 | if (p > buf) |
643 | __ungetwc(*--p, fp); |
644 | goto match_failure; |
645 | } |
646 | c = p[-1]; |
647 | if (c == 'x' || c == 'X') { |
648 | --p; |
649 | __ungetwc(c, fp); |
650 | } |
651 | if ((flags & SUPPRESS0x00400) == 0) { |
652 | uintmax_t res; |
653 | |
654 | *p = '\0'; |
655 | if (flags & UNSIGNED0x00800) |
656 | res = wcstoimax(buf, NULL((void *)0), base); |
657 | else |
658 | res = wcstoumax(buf, NULL((void *)0), base); |
659 | if (flags & POINTER0x00020) |
660 | *va_arg(ap, void **)__builtin_va_arg((ap), void **) = |
661 | (void *)(uintptr_t)res; |
662 | else if (flags & MAXINT0x00080) |
663 | *va_arg(ap, intmax_t *)__builtin_va_arg((ap), intmax_t *) = res; |
664 | else if (flags & LLONG0x00010) |
665 | *va_arg(ap, long long *)__builtin_va_arg((ap), long long *) = res; |
666 | else if (flags & SIZEINT0x00040) |
667 | *va_arg(ap, ssize_t *)__builtin_va_arg((ap), ssize_t *) = res; |
668 | else if (flags & PTRINT0x00100) |
669 | *va_arg(ap, ptrdiff_t *)__builtin_va_arg((ap), ptrdiff_t *) = res; |
670 | else if (flags & LONG0x00001) |
671 | *va_arg(ap, long *)__builtin_va_arg((ap), long *) = res; |
672 | else if (flags & SHORT0x00004) |
673 | *va_arg(ap, short *)__builtin_va_arg((ap), short *) = res; |
674 | else if (flags & SHORTSHORT0x00008) |
675 | *va_arg(ap, signed char *)__builtin_va_arg((ap), signed char *) = res; |
676 | else |
677 | *va_arg(ap, int *)__builtin_va_arg((ap), int *) = res; |
678 | nassigned++; |
679 | } |
680 | nread += p - buf; |
681 | nconversions++; |
682 | break; |
683 | |
684 | #ifdef FLOATING_POINT1 |
685 | case CT_FLOAT4: |
686 | /* scan a floating point number as if by strtod */ |
687 | if (width == 0 || width > sizeof(buf) / |
688 | sizeof(*buf) - 1) |
689 | width = sizeof(buf) / sizeof(*buf) - 1; |
690 | flags |= SIGNOK0x01000 | NDIGITS0x04000 | DPTOK0x08000 | EXPOK0x10000; |
691 | for (p = buf; width; width--) { |
692 | c = __fgetwc_unlock(fp); |
693 | /* |
694 | * This code mimics the integer conversion |
695 | * code, but is much simpler. |
696 | */ |
697 | switch (c) { |
698 | |
699 | case '0': case '1': case '2': case '3': |
700 | case '4': case '5': case '6': case '7': |
701 | case '8': case '9': |
702 | flags &= ~(SIGNOK0x01000 | NDIGITS0x04000); |
703 | goto fok; |
704 | |
705 | case '+': case '-': |
706 | if (flags & SIGNOK0x01000) { |
707 | flags &= ~SIGNOK0x01000; |
708 | goto fok; |
709 | } |
710 | break; |
711 | case 'e': case 'E': |
712 | /* no exponent without some digits */ |
713 | if ((flags&(NDIGITS0x04000|EXPOK0x10000)) == EXPOK0x10000) { |
714 | flags = |
715 | (flags & ~(EXPOK0x10000|DPTOK0x08000)) | |
716 | SIGNOK0x01000 | NDIGITS0x04000; |
717 | goto fok; |
718 | } |
719 | break; |
720 | default: |
721 | if (decimal_point == 0) { |
722 | bzero(&mbs, sizeof(mbs)); |
723 | nconv = mbrtowc(&decimal_point, |
724 | localeconv()->decimal_point, |
725 | MB_CUR_MAX__mb_cur_max(), &mbs); |
726 | if (nconv == 0 || |
727 | nconv == (size_t)-1 || |
728 | nconv == (size_t)-2) |
729 | decimal_point = '.'; |
730 | } |
731 | if (c == decimal_point && |
732 | (flags & DPTOK0x08000)) { |
733 | flags &= ~(SIGNOK0x01000 | DPTOK0x08000); |
734 | goto fok; |
735 | } |
736 | break; |
737 | } |
738 | if (c != WEOF((wint_t)-1)) |
739 | __ungetwc(c, fp); |
740 | break; |
741 | fok: |
742 | *p++ = c; |
743 | } |
744 | /* |
745 | * If no digits, might be missing exponent digits |
746 | * (just give back the exponent) or might be missing |
747 | * regular digits, but had sign and/or decimal point. |
748 | */ |
749 | if (flags & NDIGITS0x04000) { |
750 | if (flags & EXPOK0x10000) { |
751 | /* no digits at all */ |
752 | while (p > buf) |
753 | __ungetwc(*--p, fp); |
754 | goto match_failure; |
755 | } |
756 | /* just a bad exponent (e and maybe sign) */ |
757 | c = *--p; |
758 | if (c != 'e' && c != 'E') { |
759 | __ungetwc(c, fp);/* sign */ |
760 | c = *--p; |
761 | } |
762 | __ungetwc(c, fp); |
763 | } |
764 | if ((flags & SUPPRESS0x00400) == 0) { |
765 | *p = 0; |
766 | if (flags & LONGDBL0x00002) { |
767 | long double res = wcstold(buf, NULL((void *)0)); |
768 | *va_arg(ap, long double *)__builtin_va_arg((ap), long double *) = res; |
769 | } else if (flags & LONG0x00001) { |
770 | double res = wcstod(buf, NULL((void *)0)); |
771 | *va_arg(ap, double *)__builtin_va_arg((ap), double *) = res; |
772 | } else { |
773 | float res = wcstof(buf, NULL((void *)0)); |
774 | *va_arg(ap, float *)__builtin_va_arg((ap), float *) = res; |
775 | } |
776 | nassigned++; |
777 | } |
778 | nread += p - buf; |
779 | nconversions++; |
780 | break; |
781 | #endif /* FLOATING_POINT */ |
782 | } |
783 | } |
784 | input_failure: |
785 | return (nconversions != 0 ? nassigned : EOF(-1)); |
786 | match_failure: |
787 | return (nassigned); |
788 | } |
789 | |
790 | int |
791 | vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, __va_list ap) |
792 | { |
793 | int r; |
794 | |
795 | FLOCKFILE(fp)do { if (_thread_cb.tc_flockfile != ((void *)0)) _thread_cb.tc_flockfile (fp); } while (0); |
796 | r = __vfwscanf(fp, fmt, ap); |
797 | FUNLOCKFILE(fp)do { if (_thread_cb.tc_funlockfile != ((void *)0)) _thread_cb .tc_funlockfile(fp); } while (0); |
798 | return (r); |
799 | } |
800 | DEF_STRONG(vfwscanf)__asm__(".global " "vfwscanf" " ; " "vfwscanf" " = " "_libc_vfwscanf" ); |