old_vfprintf.c 18 KB

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  1. /*
  2. * This file based on printf.c from 'Dlibs' on the atari ST (RdeBath)
  3. *
  4. *
  5. * Dale Schumacher 399 Beacon Ave.
  6. * (alias: Dalnefre') St. Paul, MN 55104
  7. * dal@syntel.UUCP United States of America
  8. * "It's not reality that's important, but how you perceive things."
  9. */
  10. /* Altered to use stdarg, made the core function vfnprintf.
  11. * Hooked into the stdio package using 'inside information'
  12. * Altered sizeof() assumptions, now assumes all integers except chars
  13. * will be either
  14. * sizeof(xxx) == sizeof(long) or sizeof(xxx) == sizeof(short)
  15. *
  16. * -RDB
  17. */
  18. /*
  19. * Manuel Novoa III Dec 2000
  20. *
  21. * The previous vfnprintf routine was almost completely rewritten with the
  22. * goal of fixing some shortcomings and reducing object size.
  23. *
  24. * The summary of changes:
  25. *
  26. * Converted print conversion specification parsing from one big switch
  27. * to a method using string tables. This new method verifies that the
  28. * conversion flags, field width, precision, qualifier, and specifier
  29. * appear in the correct order. Many questionable specifications were
  30. * accepted by the previous code. This new method also resulted in a
  31. * substantial reduction in object size of about 330 bytes (20%) from
  32. * the old version (1627 bytes) on i386, even with the following
  33. * improvements.
  34. *
  35. * Implemented %n specifier as required by the standards.
  36. * Implemented proper handling of precision for int types.
  37. * Implemented # for hex and pointer, fixed error for octal rep of 0.
  38. * Implemented return of -1 on stream error.
  39. *
  40. * Added optional support for the GNU extension %m which prints the string
  41. * corresponding the errno.
  42. *
  43. * Added optional support for long long ints and unsigned long long ints
  44. * using the conversion qualifiers "ll", "L", or "q" (like glibc).
  45. *
  46. * Added optional support for doubles in a very limited form. None of
  47. * the formating options are obeyed. The string returned by __dtostr
  48. * is printed directly.
  49. *
  50. * Converted to use my (un)signed long (long) to string routines, which are
  51. * smaller than the previous functions and don't require static buffers.
  52. *
  53. * Other Modifications:
  54. * Modified sprintf, snprintf, vsprintf, vsnprintf to share on fake-file.
  55. */
  56. /*
  57. * Manuel Novoa III Jan 2001
  58. *
  59. * Removed fake file from *s*printf functions because of possible problems
  60. * if called recursively. Instead, have sprintf, snprintf, and vsprintf
  61. * call vsnprintf which allocates a fake file on the stack.
  62. * Removed WANT_FPUTC option. Always use standard putc macro to avoid
  63. * problems with the fake file used by the *s*printf functions.
  64. * Fixed bug parsing flags -- did not restart scan.
  65. * Added function asprintf.
  66. * Fixed 0-pad prefixing bug.
  67. * Converted sizeof(int) == sizeof(long) tests to compile time vs run time.
  68. * This saves 112 bytes of code on i386.
  69. * Fixed precision bug -- when negative set to default.
  70. * Added function fnprintf to support __dtostr.
  71. * Added floating point support for doubles. Yeah!
  72. *
  73. *
  74. * May 2001 Fixes from Johan Adolfsson (johan.adolfsson@axis.com)
  75. * 1) printf("%c",0) returned 0 instead of 1.
  76. * 2) unrolled loop in asprintf to reduce size and remove compile warning.
  77. *
  78. *
  79. * June 2001
  80. * 1) fix %p so that "0x" is prepended to outputed hex val
  81. * 2) fix %p so that "(nil)" is output for (void *)0 to match glibc
  82. *
  83. * Sep 5, 2003
  84. * Convert to new floating point conversion routine.
  85. * Fix qualifier handling on integer and %n conversions.
  86. * Add support for vsnprintf when in non-buffered/no-wchar configuration.
  87. *
  88. */
  89. /*****************************************************************************/
  90. /* OPTIONS */
  91. /*****************************************************************************/
  92. /* The optional support for long longs and doubles comes in two forms.
  93. *
  94. * 1) Normal (or partial for doubles) output support. Set to 1 to turn on.
  95. * Adds about 130 bytes for doubles, about 220 bytes for long longs,
  96. * and about 275 for both to the base code size of 1163 on i386.
  97. */
  98. /* These are now set in uClibc_config.h based on Config. */
  99. /*
  100. #define __UCLIBC_HAS_FLOATS__ 1
  101. */
  102. /* 2) An error message is inserted into the stream, an arg of the
  103. * appropriate size is removed from the arglist, and processing
  104. * continues. This is adds less code and may be useful in some
  105. * cases. Set to 1 to turn on. Adds about 50 bytes for doubles,
  106. * about 140 bytes for long longs, and about 175 bytes for both
  107. * to the base code size of 1163 on i386.
  108. */
  109. #define WANT_FLOAT_ERROR 0
  110. /*
  111. * Set to support GNU extension of %m to print string corresponding to errno.
  112. *
  113. * Warning: This adds about 50 bytes (i386) to the code but it also pulls in
  114. * strerror and the corresponding string table which together are about 3.8k.
  115. */
  116. /* Now controlled by uClibc_stdio.h and set below. */
  117. /* #define WANT_GNU_ERRNO 0 */
  118. /**************************************************************************/
  119. #define strnlen __strnlen
  120. #define _ISOC99_SOURCE /* for ULLONG primarily... */
  121. #define _GNU_SOURCE /* for strnlen */
  122. #include "_stdio.h"
  123. /* #include <stdio.h> */
  124. #include <stdarg.h>
  125. #include <limits.h>
  126. #include <stdint.h>
  127. #include <string.h>
  128. #include <errno.h>
  129. #include <ctype.h>
  130. #include <bits/uClibc_uintmaxtostr.h>
  131. #define __PRINTF_INFO_NO_BITFIELD
  132. #include <printf.h>
  133. #ifdef __UCLIBC_HAS_THREADS__
  134. #include <pthread.h>
  135. #endif /* __UCLIBC_HAS_THREADS__ */
  136. /* #undef __UCLIBC_HAS_FLOATS__ */
  137. /* #undef WANT_FLOAT_ERROR */
  138. /* #define WANT_FLOAT_ERROR 1 */
  139. /* #define __isdigit(c) (((unsigned int)(c - '0')) < 10) */
  140. #ifdef __UCLIBC_HAS_PRINTF_M_SPEC__
  141. #define WANT_GNU_ERRNO 1
  142. #else
  143. #define WANT_GNU_ERRNO 0
  144. #endif
  145. #undef PUTC
  146. #undef OUTNSTR
  147. #undef _outnstr
  148. #ifdef __STDIO_BUFFERS
  149. #define PUTC(C,F) __putc_unlocked((C),(F))
  150. #define OUTNSTR _outnstr
  151. #define _outnstr(stream, string, len) __stdio_fwrite(string, len, stream)
  152. #else /* __STDIO_BUFFERS */
  153. typedef struct {
  154. FILE f;
  155. unsigned char *bufend; /* pointer to 1 past end of buffer */
  156. unsigned char *bufpos;
  157. } __FILE_vsnprintf;
  158. #ifdef __UCLIBC_HAS_FLOATS__
  159. static void _outnstr(FILE *stream, const unsigned char *s, size_t n)
  160. {
  161. __FILE_vsnprintf *f = (__FILE_vsnprintf *) stream;
  162. if (!__STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(&f->f)) {
  163. __stdio_fwrite(s, n, &f->f);
  164. } else if (f->bufend > f->bufpos) {
  165. size_t r = f->bufend - f->bufpos;
  166. if (r > n) {
  167. r = n;
  168. }
  169. __memcpy(f->bufpos, s, r);
  170. f->bufpos += r;
  171. }
  172. }
  173. #endif
  174. static void putc_unlocked_sprintf(int c, __FILE_vsnprintf *f)
  175. {
  176. if (!__STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(&f->f)) {
  177. __putc_unlocked(c, &f->f);
  178. } else if (f->bufpos < f->bufend) {
  179. *f->bufpos++ = c;
  180. }
  181. }
  182. #define PUTC(C,F) putc_unlocked_sprintf((C),(__FILE_vsnprintf *)(F))
  183. #define OUTNSTR _outnstr
  184. #endif /* __STDIO_BUFFERS */
  185. #ifdef __UCLIBC_HAS_FLOATS__
  186. #include <float.h>
  187. #include <bits/uClibc_fpmax.h>
  188. typedef void (__fp_outfunc_t)(FILE *fp, intptr_t type, intptr_t len,
  189. intptr_t buf);
  190. extern size_t _fpmaxtostr(FILE * fp, __fpmax_t x, struct printf_info *info,
  191. __fp_outfunc_t fp_outfunc) attribute_hidden;
  192. static void _charpad(FILE * __restrict stream, int padchar, size_t numpad)
  193. {
  194. /* TODO -- Use a buffer to cut down on function calls... */
  195. char pad[1];
  196. *pad = padchar;
  197. while (numpad) {
  198. OUTNSTR(stream, pad, 1);
  199. --numpad;
  200. }
  201. }
  202. static void _fp_out_narrow(FILE *fp, intptr_t type, intptr_t len, intptr_t buf)
  203. {
  204. if (type & 0x80) { /* Some type of padding needed. */
  205. int buflen = __strlen((const char *) buf);
  206. if ((len -= buflen) > 0) {
  207. _charpad(fp, (type & 0x7f), len);
  208. }
  209. len = buflen;
  210. }
  211. if (len) {
  212. OUTNSTR(fp, (const char *) buf, len);
  213. }
  214. }
  215. #endif
  216. enum {
  217. FLAG_PLUS = 0,
  218. FLAG_MINUS_LJUSTIFY,
  219. FLAG_HASH,
  220. FLAG_0_PAD,
  221. FLAG_SPACE,
  222. };
  223. /* layout 01234 */
  224. static const char spec[] = "+-#0 ";
  225. /**********************************************************************/
  226. extern void _store_inttype(void *dest, int desttype, uintmax_t val) attribute_hidden;
  227. extern uintmax_t _load_inttype(int desttype, const void *src, int uflag) attribute_hidden;
  228. /*
  229. * In order to ease translation to what arginfo and _print_info._flags expect,
  230. * we map: 0:int 1:char 2:longlong 4:long 8:short
  231. * and then _flags |= (((q << 7) + q) & 0x701) and argtype |= (_flags & 0x701)
  232. */
  233. #ifdef PDS
  234. #error PDS already defined!
  235. #endif
  236. #ifdef SS
  237. #error SS already defined!
  238. #endif
  239. #ifdef IMS
  240. #error IMS already defined!
  241. #endif
  242. #if PTRDIFF_MAX == INT_MAX
  243. #define PDS 0
  244. #elif PTRDIFF_MAX == LONG_MAX
  245. #define PDS 4
  246. #elif defined(LLONG_MAX) && (PTRDIFF_MAX == LLONG_MAX)
  247. #define PDS 8
  248. #else
  249. #error fix QUAL_CHARS ptrdiff_t entry 't'!
  250. #endif
  251. #if SIZE_MAX == UINT_MAX
  252. #define SS 0
  253. #elif SIZE_MAX == ULONG_MAX
  254. #define SS 4
  255. #elif defined(LLONG_MAX) && (SIZE_MAX == ULLONG_MAX)
  256. #define SS 8
  257. #else
  258. #error fix QUAL_CHARS size_t entries 'z', 'Z'!
  259. #endif
  260. #if INTMAX_MAX == INT_MAX
  261. #define IMS 0
  262. #elif INTMAX_MAX == LONG_MAX
  263. #define IMS 4
  264. #elif defined(LLONG_MAX) && (INTMAX_MAX == LLONG_MAX)
  265. #define IMS 8
  266. #else
  267. #error fix QUAL_CHARS intmax_t entry 'j'!
  268. #endif
  269. #define QUAL_CHARS { \
  270. /* j:(u)intmax_t z:(s)size_t t:ptrdiff_t \0:int */ \
  271. /* q:long_long Z:(s)size_t */ \
  272. 'h', 'l', 'L', 'j', 'z', 't', 'q', 'Z', 0, \
  273. 2, 4, 8, IMS, SS, PDS, 8, SS, 0, /* TODO -- fix!!! */\
  274. 1, 8 \
  275. }
  276. static const char qual_chars[] = QUAL_CHARS;
  277. /* static const char qual[] = "hlLq"; */
  278. /**********************************************************************/
  279. #if !defined(__UCLIBC_HAS_FLOATS__) && WANT_FLOAT_ERROR
  280. static const char dbl_err[] = "<DOUBLE>";
  281. #endif
  282. #if defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR
  283. /* layout 012345678901234567 */
  284. static const char u_spec[] = "%nbopxXudicsfgGeEaA";
  285. #else
  286. /* layout 0123456789012 */
  287. static const char u_spec[] = "%nbopxXudics";
  288. #endif
  289. /* WARNING: u_spec and u_radix need to stay in agreement!!! */
  290. /* u_radix[i] <-> u_spec[i+2] for unsigned entries only */
  291. static const char u_radix[] = "\x02\x08\x10\x10\x10\x0a";
  292. int attribute_hidden __vfprintf(FILE * __restrict op, register const char * __restrict fmt,
  293. va_list ap)
  294. {
  295. union {
  296. #ifdef LLONG_MAX
  297. long long ll;
  298. #endif
  299. #if LONG_MAX != INT_MAX
  300. long l;
  301. #endif
  302. int i;
  303. } intarg;
  304. int i, cnt, dataargtype, len;
  305. const void *argptr; /* This does not need to be initialized. */
  306. register char *p;
  307. const char *fmt0;
  308. int preci, width;
  309. #define upcase i
  310. int radix, dpoint /*, upcase*/;
  311. char tmp[65]; /* TODO - determing needed size from headers */
  312. char flag[sizeof(spec)];
  313. __STDIO_AUTO_THREADLOCK_VAR;
  314. __STDIO_AUTO_THREADLOCK(op);
  315. __STDIO_STREAM_VALIDATE(op);
  316. cnt = 0;
  317. if (__STDIO_STREAM_IS_NARROW_WRITING(op)
  318. || !__STDIO_STREAM_TRANS_TO_WRITE(op, __FLAG_NARROW)
  319. ) {
  320. while (*fmt) {
  321. if (*fmt == '%') {
  322. fmt0 = fmt; /* save our position in case of bad format */
  323. ++fmt;
  324. width = -1; /* min field width */
  325. preci = -5; /* max string width or mininum digits */
  326. radix = 10; /* number base */
  327. dpoint = 0; /* found decimal point */
  328. /* init flags */
  329. for (p =(char *) spec ; *p ; p++) {
  330. flag[p-spec] = '\0';
  331. }
  332. flag[FLAG_0_PAD] = ' ';
  333. /* process optional flags */
  334. for (p = (char *)spec ; *p ; ) {
  335. if (*fmt == *p) {
  336. flag[p-spec] = *fmt++;
  337. p = (char *)spec; /* restart scan */
  338. } else {
  339. p++;
  340. }
  341. }
  342. if (!flag[FLAG_PLUS]) {
  343. flag[FLAG_PLUS] = flag[FLAG_SPACE];
  344. }
  345. /* process optional width and precision */
  346. do {
  347. if (*fmt == '.') {
  348. ++fmt;
  349. dpoint = 1;
  350. }
  351. if (*fmt == '*') { /* parameter width value */
  352. ++fmt;
  353. i = va_arg(ap, int);
  354. } else {
  355. for ( i = 0 ; (*fmt >= '0') && (*fmt <= '9') ; ++fmt ) {
  356. i = (i * 10) + (*fmt - '0');
  357. }
  358. }
  359. if (dpoint) {
  360. preci = i;
  361. if (i<0) {
  362. preci = -5;
  363. }
  364. } else {
  365. width = i;
  366. if (i<0) {
  367. width = -i;
  368. flag[FLAG_MINUS_LJUSTIFY] = 1;
  369. }
  370. }
  371. } while ((*fmt == '.') && !dpoint );
  372. /* process optional qualifier */
  373. p = (char *) qual_chars;
  374. do {
  375. if (*fmt == *p) {
  376. ++fmt;
  377. break;
  378. }
  379. } while (*++p);
  380. if ((p - qual_chars < 2) && (*fmt == *p)) {
  381. p += ((sizeof(qual_chars)-2) / 2);
  382. ++fmt;
  383. }
  384. dataargtype = ((int)(p[(sizeof(qual_chars)-2) / 2])) << 8;
  385. #if WANT_GNU_ERRNO
  386. if (*fmt == 'm') {
  387. flag[FLAG_PLUS] = '\0';
  388. flag[FLAG_0_PAD] = ' ';
  389. p = __glibc_strerror_r_internal(errno, tmp, sizeof(tmp));
  390. goto print;
  391. }
  392. #endif
  393. /* process format specifier */
  394. for (p = (char *) u_spec ; *p ; p++) {
  395. if (*fmt != *p) continue;
  396. if (p-u_spec < 1) { /* print a % */
  397. goto charout;
  398. }
  399. if (p-u_spec < 2) { /* store output count in int ptr */
  400. _store_inttype(va_arg(ap, void *),
  401. dataargtype,
  402. (intmax_t) (cnt));
  403. goto nextfmt;
  404. }
  405. if (p-u_spec < 10) {
  406. if (*p == 'p') {
  407. #if INTPTR_MAX == INT_MAX
  408. dataargtype = 0;
  409. #else
  410. #error Fix dataargtype for pointers!
  411. #endif
  412. }
  413. switch(dataargtype) {
  414. case (PA_INT|PA_FLAG_LONG_LONG):
  415. #ifdef LLONG_MAX
  416. intarg.ll = va_arg(ap, long long);
  417. argptr = &intarg.ll;
  418. break;
  419. #endif
  420. case (PA_INT|PA_FLAG_LONG):
  421. #if LONG_MAX != INT_MAX
  422. intarg.l = va_arg(ap, long);
  423. argptr = &intarg.l;
  424. break;
  425. #endif
  426. default:
  427. intarg.i = va_arg(ap, int);
  428. argptr = &intarg.i;
  429. break;
  430. }
  431. }
  432. if (p-u_spec < 8) { /* unsigned conversion */
  433. radix = u_radix[p-u_spec-2];
  434. upcase = ((*p == 'x') ? __UIM_LOWER : __UIM_UPPER);
  435. if (*p == 'p') {
  436. upcase = __UIM_LOWER;
  437. flag[FLAG_HASH] = 'p';
  438. }
  439. p = _uintmaxtostr(tmp + sizeof(tmp) - 1,
  440. (uintmax_t)
  441. _load_inttype(dataargtype, argptr, radix),
  442. radix, upcase);
  443. flag[FLAG_PLUS] = '\0'; /* meaningless for unsigned */
  444. if (*p != '0') { /* non-zero */
  445. if (flag[FLAG_HASH]) {
  446. if (radix == 8) {
  447. *--p = '0'; /* add leadding zero */
  448. } else if (radix != 10) { /* either 2 or 16 */
  449. flag[FLAG_PLUS] = '0';
  450. *--p = 'b';
  451. if (radix == 16) {
  452. *p = 'x';
  453. if (*fmt == 'X') {
  454. *p = 'X';
  455. }
  456. }
  457. }
  458. }
  459. } else if (flag[FLAG_HASH] == 'p') { /* null pointer */
  460. p = "(nil)";
  461. }
  462. } else if (p-u_spec < 10) { /* signed conversion */
  463. p = _uintmaxtostr(tmp + sizeof(tmp) - 1,
  464. (uintmax_t)
  465. _load_inttype(dataargtype, argptr, -radix),
  466. -radix, upcase);
  467. } else if (p-u_spec < 12) { /* character or string */
  468. flag[FLAG_PLUS] = '\0';
  469. flag[FLAG_0_PAD] = ' ';
  470. if (*p == 'c') { /* character */
  471. p = tmp;
  472. *p = va_arg(ap, int);
  473. /* This takes care of the "%c",0 case */
  474. len = 1;
  475. goto print_len_set;
  476. } else { /* string */
  477. p = va_arg(ap, char *);
  478. if (!p) {
  479. p = "(null)";
  480. preci = 6;
  481. } else {
  482. if (preci < 0) {
  483. preci = INT_MAX;
  484. }
  485. }
  486. len = strnlen(p, preci);
  487. goto print_len_set;
  488. }
  489. #if defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR
  490. } else if (p-u_spec < 27) { /* floating point */
  491. #endif /* defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR */
  492. #if defined(__UCLIBC_HAS_FLOATS__)
  493. struct printf_info info;
  494. if (preci < 0) {
  495. preci = 6;
  496. }
  497. info.width = width;
  498. info.prec = preci;
  499. info.spec = *fmt;
  500. info.pad = flag[FLAG_0_PAD];
  501. info._flags = 0;
  502. if (flag[FLAG_PLUS] == '+') {
  503. PRINT_INFO_SET_FLAG(&info,showsign);
  504. } else if (flag[FLAG_PLUS] == ' ') {
  505. PRINT_INFO_SET_FLAG(&info,space);
  506. }
  507. if (flag[FLAG_HASH]) {
  508. PRINT_INFO_SET_FLAG(&info,alt);
  509. }
  510. if (flag[FLAG_MINUS_LJUSTIFY]) {
  511. PRINT_INFO_SET_FLAG(&info,left);
  512. }
  513. #if 1
  514. cnt += _fpmaxtostr(op,
  515. (__fpmax_t)
  516. ((dataargtype == (8 << 8))
  517. ? va_arg(ap, long double)
  518. : (long double) va_arg(ap, double)),
  519. &info, _fp_out_narrow);
  520. #else
  521. cnt += _fpmaxtostr(op,
  522. (__fpmax_t)
  523. ((lval > 1)
  524. ? va_arg(ap, long double)
  525. : (long double) va_arg(ap, double)),
  526. &info, _fp_out_narrow);
  527. #endif
  528. goto nextfmt;
  529. #elif WANT_FLOAT_ERROR
  530. (void) ((lval > 1) ? va_arg(ap, long double)
  531. : va_arg(ap, double)); /* carry on */
  532. p = (char *) dbl_err;
  533. #endif /* defined(__UCLIBC_HAS_FLOATS__) */
  534. }
  535. #if WANT_GNU_ERRNO
  536. print:
  537. #endif
  538. { /* this used to be printfield */
  539. /* cheaper than strlen call */
  540. /* for ( len = 0 ; p[len] ; len++ ) { } */
  541. len = strnlen(p, SIZE_MAX);
  542. print_len_set:
  543. if ((*p == '-')
  544. #if WANT_GNU_ERRNO
  545. && (*fmt != 'm')
  546. #endif
  547. && (*fmt != 's')) {
  548. flag[FLAG_PLUS] = *p++;
  549. --len;
  550. }
  551. if (flag[FLAG_PLUS]) {
  552. ++len;
  553. ++preci;
  554. if (flag[FLAG_PLUS] == '0') { /* base 16 */
  555. ++preci; /* account for x or X */
  556. }
  557. }
  558. if (preci >= 0) {
  559. if ((*fmt == 's')
  560. #if WANT_GNU_ERRNO
  561. || (*fmt == 'm')
  562. #endif
  563. ) {
  564. if (len > preci) {
  565. len = preci;
  566. } else {
  567. preci = len;
  568. }
  569. }
  570. preci -= len;
  571. if (preci < 0) {
  572. preci = 0;
  573. }
  574. width -= preci;
  575. }
  576. width -= len;
  577. if (width < 0) {
  578. width = 0;
  579. }
  580. if (preci < 0) {
  581. preci = 0;
  582. if (!flag[FLAG_MINUS_LJUSTIFY]
  583. /* && flag[FLAG_PLUS] */
  584. && (flag[FLAG_0_PAD] == '0')) {
  585. preci = width;
  586. width = 0;
  587. }
  588. }
  589. while (width + len + preci) {
  590. unsigned char ch;
  591. /* right padding || left padding */
  592. if ((!len && !preci)
  593. || (width && !flag[FLAG_MINUS_LJUSTIFY])) {
  594. ch = ' ';
  595. --width;
  596. } else if (flag[FLAG_PLUS]) {
  597. ch = flag[FLAG_PLUS]; /* sign */
  598. if (flag[FLAG_PLUS]=='0') { /* base 16 case */
  599. flag[FLAG_PLUS] = *p++; /* get the x|X */
  600. } else {
  601. flag[FLAG_PLUS] = '\0';
  602. }
  603. --len;
  604. } else if (preci) {
  605. ch = '0';
  606. --preci;
  607. } else {
  608. ch = *p++; /* main field */
  609. --len;
  610. }
  611. ++cnt;
  612. PUTC(ch, op);
  613. }
  614. }
  615. goto nextfmt;
  616. }
  617. fmt = fmt0; /* this was an illegal format */
  618. }
  619. charout:
  620. ++cnt;
  621. PUTC(*fmt, op); /* normal char out */
  622. nextfmt:
  623. ++fmt;
  624. }
  625. }
  626. i = (__FERROR_UNLOCKED(op)) ? -1 : cnt;
  627. __STDIO_STREAM_VALIDATE(op);
  628. __STDIO_AUTO_THREADUNLOCK(op);
  629. return i;
  630. }
  631. strong_alias(__vfprintf,vfprintf)