_stdio.h 15 KB

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  1. /* Copyright (C) 2004-2005 Manuel Novoa III <mjn3@codepoet.org>
  2. *
  3. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  4. *
  5. * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
  6. */
  7. #define _GNU_SOURCE
  8. #include <assert.h>
  9. #include <errno.h>
  10. #include <fcntl.h>
  11. #include <limits.h>
  12. #include <signal.h>
  13. #include <stdint.h>
  14. #include <stdio.h>
  15. #include <stdlib.h>
  16. #include <string.h>
  17. #include <unistd.h>
  18. #include <features.h>
  19. #ifdef __UCLIBC_HAS_WCHAR__
  20. #include <wchar.h>
  21. #endif
  22. #ifdef __UCLIBC_HAS_THREADS__
  23. #include <pthread.h>
  24. #define __STDIO_THREADLOCK_OPENLIST \
  25. __pthread_mutex_lock(&_stdio_openlist_lock)
  26. #define __STDIO_THREADUNLOCK_OPENLIST \
  27. __pthread_mutex_unlock(&_stdio_openlist_lock)
  28. #define __STDIO_THREADTRYLOCK_OPENLIST \
  29. __pthread_mutex_trylock(&_stdio_openlist_lock)
  30. #else
  31. #define __STDIO_THREADLOCK_OPENLIST ((void)0)
  32. #define __STDIO_THREADUNLOCK_OPENLIST ((void)0)
  33. #endif
  34. #define __UNDEFINED_OR_NONPORTABLE ((void)0)
  35. /**********************************************************************/
  36. #ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
  37. extern __ssize_t _cs_read(void *cookie, char *buf, size_t bufsize) attribute_hidden;
  38. extern __ssize_t _cs_write(void *cookie, const char *buf, size_t bufsize) attribute_hidden;
  39. extern int _cs_seek(void *cookie, __offmax_t *pos, int whence) attribute_hidden;
  40. extern int _cs_close(void *cookie) attribute_hidden;
  41. #define __STDIO_STREAM_RESET_GCS(S) \
  42. (S)->__cookie = &((S)->__filedes); \
  43. (S)->__gcs.read = _cs_read; \
  44. (S)->__gcs.write = _cs_write; \
  45. (S)->__gcs.seek = _cs_seek; \
  46. (S)->__gcs.close = _cs_close
  47. #define __READ(STREAMPTR,BUF,SIZE) \
  48. ((((STREAMPTR)->__gcs.read) == NULL) ? -1 : \
  49. (((STREAMPTR)->__gcs.read)((STREAMPTR)->__cookie,(BUF),(SIZE))))
  50. #define __WRITE(STREAMPTR,BUF,SIZE) \
  51. ((((STREAMPTR)->__gcs.write) == NULL) ? -1 : \
  52. (((STREAMPTR)->__gcs.write)((STREAMPTR)->__cookie,(BUF),(SIZE))))
  53. #define __SEEK(STREAMPTR,PPOS,WHENCE) \
  54. ((((STREAMPTR)->__gcs.seek) == NULL) ? -1 : \
  55. (((STREAMPTR)->__gcs.seek)((STREAMPTR)->__cookie,(PPOS),(WHENCE))))
  56. #define __CLOSE(STREAMPTR) \
  57. ((((STREAMPTR)->__gcs.close) == NULL) ? 0 : \
  58. (((STREAMPTR)->__gcs.close)((STREAMPTR)->__cookie)))
  59. #else /* __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ */
  60. extern int __stdio_seek(FILE *stream, register __offmax_t *pos, int whence) attribute_hidden;
  61. #define __STDIO_STREAM_RESET_GCS(S) ((void)0)
  62. #define __READ(STREAMPTR,BUF,SIZE) \
  63. (read((STREAMPTR)->__filedes,(BUF),(SIZE)))
  64. #define __WRITE(STREAMPTR,BUF,SIZE) \
  65. (write((STREAMPTR)->__filedes,(BUF),(SIZE)))
  66. #define __SEEK(STREAMPTR,PPOS,WHENCE) \
  67. (__stdio_seek((STREAMPTR),(PPOS),(WHENCE)))
  68. #define __CLOSE(STREAMPTR) \
  69. (close((STREAMPTR)->__filedes))
  70. #endif /* __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ */
  71. /**********************************************************************/
  72. #ifdef __UCLIBC_HAS_WCHAR__
  73. #define __STDIO_STREAM_TRANS_TO_WRITE(S,O) __stdio_trans2w_o((S), (O))
  74. #define __STDIO_STREAM_TRANS_TO_READ(S,O) __stdio_trans2r_o((S), (O))
  75. #else
  76. #define __STDIO_STREAM_TRANS_TO_WRITE(S,O) __stdio_trans2w((S))
  77. #define __STDIO_STREAM_TRANS_TO_READ(S,O) __stdio_trans2r((S))
  78. #endif
  79. /**********************************************************************/
  80. #define __STDIO_STREAM_IS_READING(S) ((S)->__modeflags & __MASK_READING)
  81. #define __STDIO_STREAM_IS_WRITING(S) ((S)->__modeflags & __FLAG_WRITING)
  82. #define __STDIO_STREAM_SET_READING(S) ((S)->__modeflags |= __FLAG_READING)
  83. #define __STDIO_STREAM_SET_WRITING(S) ((S)->__modeflags |= __FLAG_WRITING)
  84. #define __STDIO_STREAM_IS_READING_OR_READONLY(S) \
  85. ((S)->__modeflags & (__MASK_READING|__FLAG_READONLY))
  86. #define __STDIO_STREAM_IS_WRITING_OR_WRITEONLY(S) \
  87. ((S)->__modeflags & (__FLAG_WRITING|__FLAG_WRITEONLY))
  88. #define __STDIO_STREAM_IS_READONLY(S) ((S)->__modeflags & __FLAG_READONLY)
  89. #define __STDIO_STREAM_IS_WRITEONLY(S) ((S)->__modeflags & __FLAG_WRITEONLY)
  90. /**********************************************************************/
  91. #ifdef __UCLIBC_HAS_WCHAR__
  92. #define __STDIO_STREAM_IS_NARROW_WRITING(S) \
  93. (((S)->__modeflags & (__FLAG_WRITING|__FLAG_NARROW)) \
  94. == (__FLAG_WRITING|__FLAG_NARROW))
  95. #define __STDIO_STREAM_IS_WIDE_WRITING(S) \
  96. (((S)->__modeflags & (__FLAG_WRITING|__FLAG_WIDE)) \
  97. == (__FLAG_WRITING|__FLAG_WIDE))
  98. #if (__FLAG_NARROW <= __MASK_READING)
  99. #error assumption violated regarding __FLAG_NARROW
  100. #endif
  101. #define __STDIO_STREAM_IS_NARROW_READING(S) \
  102. (((S)->__modeflags & (__MASK_READING|__FLAG_NARROW)) > __FLAG_NARROW)
  103. #define __STDIO_STREAM_IS_WIDE_READING(S) \
  104. (((S)->__modeflags & (__MASK_READING|__FLAG_WIDE)) > __FLAG_WIDE)
  105. #define __STDIO_STREAM_IS_NARROW(S) ((S)->__modeflags & __FLAG_NARROW)
  106. #define __STDIO_STREAM_IS_WIDE(S) ((S)->__modeflags & __FLAG_WIDE)
  107. #define __STDIO_STREAM_SET_NARROW(S) \
  108. ((void)((S)->__modeflags |= __FLAG_NARROW))
  109. #define __STDIO_STREAM_SET_WIDE(S) \
  110. ((void)((S)->__modeflags |= __FLAG_WIDE))
  111. #else
  112. #define __STDIO_STREAM_IS_NARROW_WRITING(S) __STDIO_STREAM_IS_WRITING(S)
  113. #define __STDIO_STREAM_IS_NARROW_READING(S) __STDIO_STREAM_IS_READING(S)
  114. #define __STDIO_STREAM_IS_NARROW(S) (1)
  115. #define __STDIO_STREAM_IS_WIDE(S) (0)
  116. #define __STDIO_STREAM_SET_NARROW(S) ((void)0)
  117. #define __STDIO_STREAM_SET_WIDE(S) ((void)0)
  118. #endif
  119. /**********************************************************************/
  120. #define __STDIO_STREAM_SET_EOF(S) \
  121. ((void)((S)->__modeflags |= __FLAG_EOF))
  122. #define __STDIO_STREAM_SET_ERROR(S) \
  123. ((void)((S)->__modeflags |= __FLAG_ERROR))
  124. #define __STDIO_STREAM_CLEAR_EOF(S) \
  125. ((void)((S)->__modeflags &= ~__FLAG_EOF))
  126. #define __STDIO_STREAM_CLEAR_ERROR(S) \
  127. ((void)((S)->__modeflags &= ~__FLAG_ERROR))
  128. #define __STDIO_STREAM_CLEAR_READING_AND_UNGOTS(S) \
  129. ((void)((S)->__modeflags &= ~__MASK_READING))
  130. #define __STDIO_STREAM_CLEAR_WRITING(S) \
  131. ((void)((S)->__modeflags &= ~__FLAG_WRITING))
  132. #ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__
  133. # define __STDIO_STREAM_DISABLE_GETC(S) \
  134. ((void)((S)->__bufgetc_u = (S)->__bufstart))
  135. # define __STDIO_STREAM_ENABLE_GETC(S) \
  136. ((void)((S)->__bufgetc_u = (S)->__bufread))
  137. # define __STDIO_STREAM_CAN_USE_BUFFER_GET(S) \
  138. ((S)->__bufpos < (S)->__bufgetc_u)
  139. #else
  140. # define __STDIO_STREAM_DISABLE_GETC(S) ((void)0)
  141. # define __STDIO_STREAM_ENABLE_GETC(S) ((void)0)
  142. # define __STDIO_STREAM_CAN_USE_BUFFER_GET(S) (0)
  143. #endif
  144. #ifdef __UCLIBC_HAS_STDIO_PUTC_MACRO__
  145. # define __STDIO_STREAM_DISABLE_PUTC(S) \
  146. ((void)((S)->__bufputc_u = (S)->__bufstart))
  147. # define __STDIO_STREAM_ENABLE_PUTC(S) \
  148. ((void)((S)->__bufputc_u = (S)->__bufend))
  149. # define __STDIO_STREAM_CAN_USE_BUFFER_ADD(S) \
  150. ((S)->__bufpos < (S)->__bufputc_u)
  151. #else
  152. # define __STDIO_STREAM_DISABLE_PUTC(S) ((void)0)
  153. # define __STDIO_STREAM_ENABLE_PUTC(S) ((void)0)
  154. # define __STDIO_STREAM_CAN_USE_BUFFER_ADD(S) (0)
  155. #endif
  156. #ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
  157. #define __STDIO_STREAM_IS_CUSTOM(S) ((S)->__cookie != &((S)->__filedes))
  158. #else
  159. #define __STDIO_STREAM_IS_CUSTOM(S) (0)
  160. #endif
  161. /**********************************************************************/
  162. #ifdef __STDIO_BUFFERS
  163. #define __STDIO_STREAM_FREE_BUFFER(S) \
  164. do { if ((S)->__modeflags & __FLAG_FREEBUF) free((S)->__bufstart); } while (0)
  165. #else
  166. #define __STDIO_STREAM_FREE_BUFFER(S) ((void)0)
  167. #endif
  168. #define __STDIO_STREAM_FREE_FILE(S) \
  169. do { if ((S)->__modeflags & __FLAG_FREEFILE) free((S)); } while (0)
  170. #ifdef __UCLIBC_HAS_LFS__
  171. #define __STDIO_WHEN_LFS(E) E
  172. #else
  173. #define __STDIO_WHEN_LFS(E) ((void)0)
  174. #endif
  175. /**********************************************************************/
  176. /* The following return 0 on success. */
  177. #ifdef __STDIO_BUFFERS
  178. /* Assume stream in valid writing state. Do not reset writing flag
  179. * or disble putc macro unless error. */
  180. /* Should we assume that buffer is not empty to avoid a check? */
  181. extern size_t __stdio_wcommit(FILE *__restrict stream) attribute_hidden;
  182. /* Remember to fail if at EOF! */
  183. extern size_t __stdio_rfill(FILE *__restrict stream) attribute_hidden;
  184. extern size_t __stdio_fwrite(const unsigned char *__restrict buffer,
  185. size_t bytes, FILE *__restrict stream) attribute_hidden;
  186. #else
  187. #define __stdio_fwrite(B,N,S) __stdio_WRITE((S),(B),(N))
  188. #endif
  189. extern size_t __stdio_WRITE(FILE *stream, const unsigned char *buf,
  190. size_t bufsize) attribute_hidden;
  191. extern size_t __stdio_READ(FILE *stream, unsigned char *buf, size_t bufsize) attribute_hidden;
  192. extern int __stdio_trans2r(FILE *__restrict stream) attribute_hidden;
  193. extern int __stdio_trans2w(FILE *__restrict stream) attribute_hidden;
  194. extern int __stdio_trans2r_o(FILE *__restrict stream, int oflag) attribute_hidden;
  195. extern int __stdio_trans2w_o(FILE *__restrict stream, int oflag) attribute_hidden;
  196. /**********************************************************************/
  197. #ifdef __STDIO_BUFFERS
  198. #define __STDIO_STREAM_IS_FBF(S) (!((S)->__modeflags & __MASK_BUFMODE))
  199. #define __STDIO_STREAM_IS_LBF(S) ((S)->__modeflags & __FLAG_LBF)
  200. #define __STDIO_STREAM_IS_NBF(S) ((S)->__modeflags & __FLAG_NBF)
  201. #define __STDIO_STREAM_BUFFER_SIZE(S) ((S)->__bufend - (S)->__bufstart)
  202. /* Valid when writing... */
  203. #define __STDIO_STREAM_BUFFER_ADD(S,C) (*(S)->__bufpos++ = (C))
  204. #define __STDIO_STREAM_BUFFER_UNADD(S) (--(S)->__bufpos)
  205. #define __STDIO_STREAM_BUFFER_WAVAIL(S) ((S)->__bufend - (S)->__bufpos)
  206. #define __STDIO_STREAM_BUFFER_WUSED(S) ((S)->__bufpos - (S)->__bufstart)
  207. #define __STDIO_COMMIT_WRITE_BUFFER(S) __stdio_wcommit((S))
  208. #ifdef __UCLIBC_HAS_WCHAR__
  209. #define __STDIO_STREAM_IS_NARROW_FBF(S) \
  210. (!((S)->__modeflags & (__MASK_BUFMODE|__FLAG_WIDE)))
  211. #else
  212. #define __STDIO_STREAM_IS_NARROW_FBF(S) __STDIO_STREAM_IS_FBF((S))
  213. #endif
  214. /* Valid when reading... */
  215. #define __STDIO_STREAM_BUFFER_RAVAIL(S) ((S)->__bufread - (S)->__bufpos)
  216. #define __STDIO_STREAM_BUFFER_GET(S) (*(S)->__bufpos++)
  217. #define __STDIO_FILL_READ_BUFFER(S) __stdio_rfill((S))
  218. #define __STDIO_STREAM_INIT_BUFREAD_BUFPOS(S) \
  219. (S)->__bufread = (S)->__bufpos = (S)->__bufstart
  220. #define __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES (-2)
  221. #define __STDIO_STREAM_FAKE_VSSCANF_FILEDES (-2)
  222. #define __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES (-3)
  223. #define __STDIO_STREAM_FAKE_VSWSCANF_FILEDES (-3)
  224. #define __STDIO_STREAM_IS_FAKE_VSNPRINTF(S) \
  225. ((S)->__filedes == __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES)
  226. #define __STDIO_STREAM_IS_FAKE_VSSCANF(S) \
  227. ((S)->__filedes == __STDIO_STREAM_FAKE_VSSCANF_FILEDES)
  228. #define __STDIO_STREAM_IS_FAKE_VSWPRINTF(S) \
  229. ((S)->__filedes == __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES)
  230. #define __STDIO_STREAM_IS_FAKE_VSWSCANF(S) \
  231. ((S)->__filedes == __STDIO_STREAM_FAKE_VSWSCANF_FILEDES)
  232. #else /* __STDIO_BUFFERS */
  233. #define __STDIO_STREAM_IS_FBF(S) (0)
  234. #define __STDIO_STREAM_IS_LBF(S) (0)
  235. #define __STDIO_STREAM_IS_NBF(S) (1)
  236. #define __STDIO_STREAM_BUFFER_SIZE(S) (0)
  237. #define __STDIO_STREAM_BUFFER_ADD(S,C) ((void)0)
  238. #define __STDIO_STREAM_BUFFER_UNADD(S) ((void)0)
  239. #define __STDIO_STREAM_BUFFER_WAVAIL(S) (0)
  240. #define __STDIO_STREAM_BUFFER_WUSED(S) (0)
  241. #define __STDIO_COMMIT_WRITE_BUFFER(S) (0)
  242. #define __STDIO_STREAM_IS_NARROW_FBF(S) (0)
  243. #define __STDIO_STREAM_BUFFER_RAVAIL(S) (0)
  244. #define __STDIO_STREAM_BUFFER_GET(S) (EOF)
  245. #define __STDIO_FILL_READ_BUFFER(S) (0)
  246. #define __STDIO_STREAM_INIT_BUFREAD_BUFPOS(S) ((void)0)
  247. #undef __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES
  248. #undef __STDIO_STREAM_FAKE_VSSCANF_FILEDES
  249. #undef __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES
  250. #define __STDIO_STREAM_IS_FAKE_VSNPRINTF(S) (0)
  251. #define __STDIO_STREAM_IS_FAKE_VSSCANF(S) (0)
  252. #undef __STDIO_STREAM_IS_FAKE_VSWPRINTF
  253. # ifdef __USE_OLD_VFPRINTF__
  254. # define __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES_NB (-2)
  255. # define __STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(S) \
  256. ((S)->__filedes == __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES_NB)
  257. # endif
  258. # ifndef __UCLIBC_HAS_WCHAR__
  259. # define __STDIO_STREAM_FAKE_VSSCANF_FILEDES_NB (-2)
  260. # define __STDIO_STREAM_IS_FAKE_VSSCANF_NB(S) \
  261. ((S)->__filedes == __STDIO_STREAM_FAKE_VSSCANF_FILEDES_NB)
  262. # endif
  263. #endif /* __STDIO_BUFFERS */
  264. /**********************************************************************/
  265. extern int __fputs_unlocked(const char *__restrict s, FILE *__restrict stream) attribute_hidden;
  266. extern int __putchar_unlocked(int c);
  267. extern size_t __fwrite_unlocked(const void *__restrict ptr, size_t size,
  268. size_t nmemb, FILE *__restrict stream) attribute_hidden;
  269. extern size_t __fread_unlocked(void *__restrict ptr, size_t size,
  270. size_t nmemb, FILE *__restrict stream) attribute_hidden;
  271. extern int __fputc_unlocked(int c, FILE *stream) attribute_hidden;
  272. extern int __fflush_unlocked(FILE *stream) attribute_hidden;
  273. extern int __stdio_adjust_position(FILE *__restrict stream, __offmax_t *pos) attribute_hidden;
  274. extern void __clearerr_unlocked(FILE *stream);
  275. extern int __feof_unlocked(FILE *stream);
  276. extern int __ferror_unlocked(FILE *stream);
  277. extern int __fgetc_unlocked(FILE *stream) attribute_hidden;
  278. extern char *__fgets_unlocked(char *__restrict s, int n,
  279. FILE * __restrict stream) attribute_hidden;
  280. extern int __fileno_unlocked(FILE *stream) attribute_hidden;
  281. extern int __getchar_unlocked(void) attribute_hidden;
  282. extern int __fseek(FILE *stream, long int offset, int whence) attribute_hidden;
  283. extern long int __ftell(FILE *stream) attribute_hidden;
  284. #ifdef __UCLIBC_HAS_LFS__
  285. extern int __fseeko64(FILE *stream, __off64_t offset, int whence) attribute_hidden;
  286. extern __off64_t __ftello64(FILE *stream) attribute_hidden;
  287. #endif
  288. #ifdef __STDIO_HAS_OPENLIST
  289. /* Uses an implementation hack!!! */
  290. #define __STDIO_FLUSH_LBF_STREAMS __fflush_unlocked((FILE *) &_stdio_openlist)
  291. #else
  292. #define __STDIO_FLUSH_LBF_STREAMS ((void)0)
  293. #endif
  294. #ifdef NDEBUG
  295. #define __STDIO_STREAM_VALIDATE(S) ((void)0)
  296. #else
  297. extern void _stdio_validate_FILE(const FILE *stream);
  298. #define __STDIO_STREAM_VALIDATE(S) _stdio_validate_FILE((S))
  299. #endif
  300. #ifdef __STDIO_MBSTATE
  301. #define __COPY_MBSTATE(dest,src) \
  302. ((void)((dest)->__mask = (src)->__mask, (dest)->__wc = (src)->__wc))
  303. #define __INIT_MBSTATE(dest) ((void)((dest)->__mask = 0))
  304. #else
  305. #define __COPY_MBSTATE(dest,src) ((void)0)
  306. #define __INIT_MBSTATE(dest) ((void)0)
  307. #endif
  308. /**********************************************************************/
  309. extern int _stdio_adjpos(FILE *__restrict stream, __offmax_t * pos);
  310. extern int _stdio_lseek(FILE *stream, __offmax_t *pos, int whence);
  311. extern size_t _stdio_fwrite(const unsigned char *buffer, size_t bytes,
  312. FILE *stream);
  313. extern size_t _stdio_fread(unsigned char *buffer, size_t bytes,
  314. FILE *stream);
  315. extern FILE *_stdio_fopen(intptr_t fname_or_mode,
  316. const char *__restrict mode,
  317. FILE *__restrict stream, int filedes) attribute_hidden;
  318. #ifdef __UCLIBC_HAS_WCHAR__
  319. extern size_t _wstdio_fwrite(const wchar_t *__restrict ws, size_t n,
  320. FILE *__restrict stream) attribute_hidden;
  321. extern wint_t __fgetwc_unlocked(register FILE *stream) attribute_hidden;
  322. extern wint_t __fputwc_unlocked(wchar_t wc, FILE *stream) attribute_hidden;
  323. #endif
  324. /**********************************************************************/
  325. /* Only use the macro below if you know fp is a valid FILE for a valid fd.
  326. * This is _not_ true for custom streams! */
  327. #define __FILENO_UNLOCKED(fp) ((fp)->__filedes)
  328. #define __FEOF_OR_FERROR_UNLOCKED(stream) \
  329. ((stream)->__modeflags & (__FLAG_EOF|__FLAG_ERROR))
  330. #if defined(__STDIO_BUFFERS) || defined(__USE_OLD_VFPRINTF__) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__)
  331. #define __STDIO_HAS_VSNPRINTF 1
  332. #endif