old_vfprintf.c 18 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710
  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 _ISOC99_SOURCE /* for ULLONG primarily... */
  120. #include "_stdio.h"
  121. /* #include <stdio.h> */
  122. #include <stdarg.h>
  123. #include <limits.h>
  124. #include <stdint.h>
  125. #include <string.h>
  126. #include <errno.h>
  127. #include <ctype.h>
  128. #include <bits/uClibc_uintmaxtostr.h>
  129. #include <printf.h>
  130. #ifdef __UCLIBC_HAS_THREADS__
  131. #include <pthread.h>
  132. #endif /* __UCLIBC_HAS_THREADS__ */
  133. /* #undef __UCLIBC_HAS_FLOATS__ */
  134. /* #undef WANT_FLOAT_ERROR */
  135. /* #define WANT_FLOAT_ERROR 1 */
  136. /* #define __isdigit(c) (((unsigned int)(c - '0')) < 10) */
  137. #ifdef __UCLIBC_HAS_PRINTF_M_SPEC__
  138. #define WANT_GNU_ERRNO 1
  139. #else
  140. #define WANT_GNU_ERRNO 0
  141. #endif
  142. #undef PUTC
  143. #undef OUTNSTR
  144. #undef _outnstr
  145. #ifdef __STDIO_BUFFERS
  146. #define PUTC(C,F) putc_unlocked((C),(F))
  147. #define OUTNSTR _outnstr
  148. #define _outnstr(stream, string, len) __stdio_fwrite(string, len, stream)
  149. #else /* __STDIO_BUFFERS */
  150. typedef struct {
  151. FILE f;
  152. unsigned char *bufend; /* pointer to 1 past end of buffer */
  153. unsigned char *bufpos;
  154. } __FILE_vsnprintf;
  155. #ifdef __UCLIBC_HAS_FLOATS__
  156. static void _outnstr(FILE *stream, const unsigned char *s, size_t n)
  157. {
  158. __FILE_vsnprintf *f = (__FILE_vsnprintf *) stream;
  159. if (!__STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(&f->f)) {
  160. __stdio_fwrite(s, n, &f->f);
  161. } else if (f->bufend > f->bufpos) {
  162. size_t r = f->bufend - f->bufpos;
  163. if (r > n) {
  164. r = n;
  165. }
  166. memcpy(f->bufpos, s, r);
  167. f->bufpos += r;
  168. }
  169. }
  170. #endif
  171. static void putc_unlocked_sprintf(int c, __FILE_vsnprintf *f)
  172. {
  173. if (!__STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(&f->f)) {
  174. putc_unlocked(c, &f->f);
  175. } else if (f->bufpos < f->bufend) {
  176. *f->bufpos++ = c;
  177. }
  178. }
  179. #define PUTC(C,F) putc_unlocked_sprintf((C),(__FILE_vsnprintf *)(F))
  180. #define OUTNSTR _outnstr
  181. #endif /* __STDIO_BUFFERS */
  182. #ifdef __UCLIBC_HAS_FLOATS__
  183. #include <float.h>
  184. #include <bits/uClibc_fpmax.h>
  185. typedef void (__fp_outfunc_t)(FILE *fp, intptr_t type, intptr_t len,
  186. intptr_t buf);
  187. extern size_t _fpmaxtostr(FILE * fp, __fpmax_t x, struct printf_info *info,
  188. __fp_outfunc_t fp_outfunc) attribute_hidden;
  189. static void _charpad(FILE * __restrict stream, int padchar, size_t numpad)
  190. {
  191. /* TODO -- Use a buffer to cut down on function calls... */
  192. char pad[1];
  193. *pad = padchar;
  194. while (numpad) {
  195. OUTNSTR(stream, pad, 1);
  196. --numpad;
  197. }
  198. }
  199. static void _fp_out_narrow(FILE *fp, intptr_t type, intptr_t len, intptr_t buf)
  200. {
  201. if (type & 0x80) { /* Some type of padding needed. */
  202. int buflen = strlen((const char *) buf);
  203. if ((len -= buflen) > 0) {
  204. _charpad(fp, (type & 0x7f), len);
  205. }
  206. len = buflen;
  207. }
  208. if (len) {
  209. OUTNSTR(fp, (const char *) buf, len);
  210. }
  211. }
  212. #endif
  213. enum {
  214. FLAG_PLUS = 0,
  215. FLAG_MINUS_LJUSTIFY,
  216. FLAG_HASH,
  217. FLAG_0_PAD,
  218. FLAG_SPACE,
  219. };
  220. /* layout 01234 */
  221. static const char spec[] = "+-#0 ";
  222. /**********************************************************************/
  223. extern void _store_inttype(void *dest, int desttype, uintmax_t val) attribute_hidden;
  224. extern uintmax_t _load_inttype(int desttype, const void *src, int uflag) attribute_hidden;
  225. /*
  226. * In order to ease translation to what arginfo and _print_info._flags expect,
  227. * we map: 0:int 1:char 2:longlong 4:long 8:short
  228. * and then _flags |= (((q << 7) + q) & 0x701) and argtype |= (_flags & 0x701)
  229. */
  230. #ifdef PDS
  231. #error PDS already defined!
  232. #endif
  233. #ifdef SS
  234. #error SS already defined!
  235. #endif
  236. #ifdef IMS
  237. #error IMS already defined!
  238. #endif
  239. #if PTRDIFF_MAX == INT_MAX
  240. #define PDS 0
  241. #elif PTRDIFF_MAX == LONG_MAX
  242. #define PDS 4
  243. #elif defined(LLONG_MAX) && (PTRDIFF_MAX == LLONG_MAX)
  244. #define PDS 8
  245. #else
  246. #error fix QUAL_CHARS ptrdiff_t entry 't'!
  247. #endif
  248. #if SIZE_MAX == UINT_MAX
  249. #define SS 0
  250. #elif SIZE_MAX == ULONG_MAX
  251. #define SS 4
  252. #elif defined(LLONG_MAX) && (SIZE_MAX == ULLONG_MAX)
  253. #define SS 8
  254. #else
  255. #error fix QUAL_CHARS size_t entries 'z', 'Z'!
  256. #endif
  257. #if INTMAX_MAX == INT_MAX
  258. #define IMS 0
  259. #elif INTMAX_MAX == LONG_MAX
  260. #define IMS 4
  261. #elif defined(LLONG_MAX) && (INTMAX_MAX == LLONG_MAX)
  262. #define IMS 8
  263. #else
  264. #error fix QUAL_CHARS intmax_t entry 'j'!
  265. #endif
  266. #define QUAL_CHARS { \
  267. /* j:(u)intmax_t z:(s)size_t t:ptrdiff_t \0:int */ \
  268. /* q:long_long Z:(s)size_t */ \
  269. 'h', 'l', 'L', 'j', 'z', 't', 'q', 'Z', 0, \
  270. 2, 4, 8, IMS, SS, PDS, 8, SS, 0, /* TODO -- fix!!! */\
  271. 1, 8 \
  272. }
  273. static const char qual_chars[] = QUAL_CHARS;
  274. /* static const char qual[] = "hlLq"; */
  275. /**********************************************************************/
  276. #if !defined(__UCLIBC_HAS_FLOATS__) && WANT_FLOAT_ERROR
  277. static const char dbl_err[] = "<DOUBLE>";
  278. #endif
  279. #if defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR
  280. /* layout 012345678901234567 */
  281. static const char u_spec[] = "%nbopxXudicsfgGeEaA";
  282. #else
  283. /* layout 0123456789012 */
  284. static const char u_spec[] = "%nbopxXudics";
  285. #endif
  286. /* WARNING: u_spec and u_radix need to stay in agreement!!! */
  287. /* u_radix[i] <-> u_spec[i+2] for unsigned entries only */
  288. static const char u_radix[] = "\x02\x08\x10\x10\x10\x0a";
  289. int vfprintf(FILE * __restrict op, register const char * __restrict fmt,
  290. va_list ap)
  291. {
  292. union {
  293. #ifdef LLONG_MAX
  294. long long ll;
  295. #endif
  296. #if LONG_MAX != INT_MAX
  297. long l;
  298. #endif
  299. int i;
  300. } intarg;
  301. int i, cnt, dataargtype, len;
  302. const void *argptr = argptr; /* ok to be initialized. */
  303. register char *p;
  304. const char *fmt0;
  305. int preci, width;
  306. #define upcase i
  307. int radix, dpoint /*, upcase*/;
  308. char tmp[65]; /* TODO - determine needed size from headers */
  309. char flag[sizeof(spec)];
  310. __STDIO_AUTO_THREADLOCK_VAR;
  311. __STDIO_AUTO_THREADLOCK(op);
  312. __STDIO_STREAM_VALIDATE(op);
  313. cnt = 0;
  314. if (__STDIO_STREAM_IS_NARROW_WRITING(op)
  315. || !__STDIO_STREAM_TRANS_TO_WRITE(op, __FLAG_NARROW)
  316. ) {
  317. while (*fmt) {
  318. if (*fmt == '%') {
  319. fmt0 = fmt; /* save our position in case of bad format */
  320. ++fmt;
  321. width = -1; /* min field width */
  322. preci = -5; /* max string width or mininum digits */
  323. radix = 10; /* number base */
  324. dpoint = 0; /* found decimal point */
  325. /* init flags */
  326. for (p =(char *) spec ; *p ; p++) {
  327. flag[p-spec] = '\0';
  328. }
  329. flag[FLAG_0_PAD] = ' ';
  330. /* process optional flags */
  331. for (p = (char *)spec ; *p ; ) {
  332. if (*fmt == *p) {
  333. flag[p-spec] = *fmt++;
  334. p = (char *)spec; /* restart scan */
  335. } else {
  336. p++;
  337. }
  338. }
  339. if (!flag[FLAG_PLUS]) {
  340. flag[FLAG_PLUS] = flag[FLAG_SPACE];
  341. }
  342. /* process optional width and precision */
  343. do {
  344. if (*fmt == '.') {
  345. ++fmt;
  346. dpoint = 1;
  347. }
  348. if (*fmt == '*') { /* parameter width value */
  349. ++fmt;
  350. i = va_arg(ap, int);
  351. } else {
  352. for ( i = 0 ; (*fmt >= '0') && (*fmt <= '9') ; ++fmt ) {
  353. i = (i * 10) + (*fmt - '0');
  354. }
  355. }
  356. if (dpoint) {
  357. preci = i;
  358. if (i<0) {
  359. preci = -5;
  360. }
  361. } else {
  362. width = i;
  363. if (i<0) {
  364. width = -i;
  365. flag[FLAG_MINUS_LJUSTIFY] = 1;
  366. }
  367. }
  368. } while ((*fmt == '.') && !dpoint );
  369. /* process optional qualifier */
  370. p = (char *) qual_chars;
  371. do {
  372. if (*fmt == *p) {
  373. ++fmt;
  374. break;
  375. }
  376. } while (*++p);
  377. if ((p - qual_chars < 2) && (*fmt == *p)) {
  378. p += ((sizeof(qual_chars)-2) / 2);
  379. ++fmt;
  380. }
  381. dataargtype = ((int)(p[(sizeof(qual_chars)-2) / 2])) << 8;
  382. #if WANT_GNU_ERRNO
  383. if (*fmt == 'm') {
  384. flag[FLAG_PLUS] = '\0';
  385. flag[FLAG_0_PAD] = ' ';
  386. p = __glibc_strerror_r(errno, tmp, sizeof(tmp));
  387. goto print;
  388. }
  389. #endif
  390. /* process format specifier */
  391. for (p = (char *) u_spec ; *p ; p++) {
  392. if (*fmt != *p) continue;
  393. if (p-u_spec < 1) { /* print a % */
  394. goto charout;
  395. }
  396. if (p-u_spec < 2) { /* store output count in int ptr */
  397. _store_inttype(va_arg(ap, void *),
  398. dataargtype,
  399. (intmax_t) (cnt));
  400. goto nextfmt;
  401. }
  402. if (p-u_spec < 10) {
  403. if (*p == 'p') {
  404. #if INTPTR_MAX == INT_MAX
  405. dataargtype = 0;
  406. #else
  407. #error Fix dataargtype for pointers!
  408. #endif
  409. }
  410. switch(dataargtype) {
  411. case (PA_INT|PA_FLAG_LONG_LONG):
  412. #ifdef LLONG_MAX
  413. intarg.ll = va_arg(ap, long long);
  414. argptr = &intarg.ll;
  415. break;
  416. #endif
  417. case (PA_INT|PA_FLAG_LONG):
  418. #if LONG_MAX != INT_MAX
  419. intarg.l = va_arg(ap, long);
  420. argptr = &intarg.l;
  421. break;
  422. #endif
  423. default:
  424. intarg.i = va_arg(ap, int);
  425. argptr = &intarg.i;
  426. break;
  427. }
  428. }
  429. if (p-u_spec < 8) { /* unsigned conversion */
  430. radix = u_radix[p-u_spec-2];
  431. upcase = ((*p == 'x') ? __UIM_LOWER : __UIM_UPPER);
  432. if (*p == 'p') {
  433. upcase = __UIM_LOWER;
  434. flag[FLAG_HASH] = 'p';
  435. }
  436. p = _uintmaxtostr(tmp + sizeof(tmp) - 1,
  437. (uintmax_t)
  438. _load_inttype(dataargtype, argptr, radix),
  439. radix, upcase);
  440. flag[FLAG_PLUS] = '\0'; /* meaningless for unsigned */
  441. if (*p != '0') { /* non-zero */
  442. if (flag[FLAG_HASH]) {
  443. if (radix == 8) {
  444. *--p = '0'; /* add leadding zero */
  445. } else if (radix != 10) { /* either 2 or 16 */
  446. flag[FLAG_PLUS] = '0';
  447. *--p = 'b';
  448. if (radix == 16) {
  449. *p = 'x';
  450. if (*fmt == 'X') {
  451. *p = 'X';
  452. }
  453. }
  454. }
  455. }
  456. } else if (flag[FLAG_HASH] == 'p') { /* null pointer */
  457. p = "(nil)";
  458. }
  459. } else if (p-u_spec < 10) { /* signed conversion */
  460. p = _uintmaxtostr(tmp + sizeof(tmp) - 1,
  461. (uintmax_t)
  462. _load_inttype(dataargtype, argptr, -radix),
  463. -radix, upcase);
  464. } else if (p-u_spec < 12) { /* character or string */
  465. flag[FLAG_PLUS] = '\0';
  466. flag[FLAG_0_PAD] = ' ';
  467. if (*p == 'c') { /* character */
  468. p = tmp;
  469. *p = va_arg(ap, int);
  470. /* This takes care of the "%c",0 case */
  471. len = 1;
  472. goto print_len_set;
  473. } else { /* string */
  474. p = va_arg(ap, char *);
  475. if (!p) {
  476. p = "(null)";
  477. preci = 6;
  478. } else {
  479. if (preci < 0) {
  480. preci = INT_MAX;
  481. }
  482. }
  483. len = strnlen(p, preci);
  484. goto print_len_set;
  485. }
  486. #if defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR
  487. } else if (p-u_spec < 27) { /* floating point */
  488. #endif /* defined(__UCLIBC_HAS_FLOATS__) || WANT_FLOAT_ERROR */
  489. #if defined(__UCLIBC_HAS_FLOATS__)
  490. struct printf_info info;
  491. if (preci < 0) {
  492. preci = 6;
  493. }
  494. info.width = width;
  495. info.prec = preci;
  496. info.spec = *fmt;
  497. info.pad = flag[FLAG_0_PAD];
  498. info._flags = 0;
  499. if (flag[FLAG_PLUS] == '+') {
  500. PRINT_INFO_SET_FLAG(&info,showsign);
  501. } else if (flag[FLAG_PLUS] == ' ') {
  502. PRINT_INFO_SET_FLAG(&info,space);
  503. }
  504. if (flag[FLAG_HASH]) {
  505. PRINT_INFO_SET_FLAG(&info,alt);
  506. }
  507. if (flag[FLAG_MINUS_LJUSTIFY]) {
  508. PRINT_INFO_SET_FLAG(&info,left);
  509. }
  510. #if 1
  511. cnt += _fpmaxtostr(op,
  512. (__fpmax_t)
  513. ((dataargtype == (8 << 8))
  514. ? va_arg(ap, long double)
  515. : (long double) va_arg(ap, double)),
  516. &info, _fp_out_narrow);
  517. #else
  518. cnt += _fpmaxtostr(op,
  519. (__fpmax_t)
  520. ((lval > 1)
  521. ? va_arg(ap, long double)
  522. : (long double) va_arg(ap, double)),
  523. &info, _fp_out_narrow);
  524. #endif
  525. goto nextfmt;
  526. #elif WANT_FLOAT_ERROR
  527. (void) ((lval > 1) ? va_arg(ap, long double)
  528. : va_arg(ap, double)); /* carry on */
  529. p = (char *) dbl_err;
  530. #endif /* defined(__UCLIBC_HAS_FLOATS__) */
  531. }
  532. #if WANT_GNU_ERRNO
  533. print:
  534. #endif
  535. { /* this used to be printfield */
  536. /* cheaper than strlen call */
  537. /* for ( len = 0 ; p[len] ; len++ ) { } */
  538. len = strnlen(p, SIZE_MAX);
  539. print_len_set:
  540. if ((*p == '-')
  541. #if WANT_GNU_ERRNO
  542. && (*fmt != 'm')
  543. #endif
  544. && (*fmt != 's')) {
  545. flag[FLAG_PLUS] = *p++;
  546. --len;
  547. }
  548. if (flag[FLAG_PLUS]) {
  549. ++len;
  550. ++preci;
  551. if (flag[FLAG_PLUS] == '0') { /* base 16 */
  552. ++preci; /* account for x or X */
  553. }
  554. }
  555. if (preci >= 0) {
  556. if ((*fmt == 's')
  557. #if WANT_GNU_ERRNO
  558. || (*fmt == 'm')
  559. #endif
  560. ) {
  561. if (len > preci) {
  562. len = preci;
  563. } else {
  564. preci = len;
  565. }
  566. }
  567. preci -= len;
  568. if (preci < 0) {
  569. preci = 0;
  570. }
  571. width -= preci;
  572. }
  573. width -= len;
  574. if (width < 0) {
  575. width = 0;
  576. }
  577. if (preci < 0) {
  578. preci = 0;
  579. if (!flag[FLAG_MINUS_LJUSTIFY]
  580. /* && flag[FLAG_PLUS] */
  581. && (flag[FLAG_0_PAD] == '0')) {
  582. preci = width;
  583. width = 0;
  584. }
  585. }
  586. while (width + len + preci) {
  587. unsigned char ch;
  588. /* right padding || left padding */
  589. if ((!len && !preci)
  590. || (width && !flag[FLAG_MINUS_LJUSTIFY])) {
  591. ch = ' ';
  592. --width;
  593. } else if (flag[FLAG_PLUS]) {
  594. ch = flag[FLAG_PLUS]; /* sign */
  595. if (flag[FLAG_PLUS]=='0') { /* base 16 case */
  596. flag[FLAG_PLUS] = *p++; /* get the x|X */
  597. } else {
  598. flag[FLAG_PLUS] = '\0';
  599. }
  600. --len;
  601. } else if (preci) {
  602. ch = '0';
  603. --preci;
  604. } else {
  605. ch = *p++; /* main field */
  606. --len;
  607. }
  608. ++cnt;
  609. PUTC(ch, op);
  610. }
  611. }
  612. goto nextfmt;
  613. }
  614. fmt = fmt0; /* this was an illegal format */
  615. }
  616. charout:
  617. ++cnt;
  618. PUTC(*fmt, op); /* normal char out */
  619. nextfmt:
  620. ++fmt;
  621. }
  622. }
  623. i = (__FERROR_UNLOCKED(op)) ? -1 : cnt;
  624. __STDIO_STREAM_VALIDATE(op);
  625. __STDIO_AUTO_THREADUNLOCK(op);
  626. return i;
  627. }
  628. libc_hidden_def(vfprintf)