Dr Andrew Scott
G7VAV
Senior Lecturer
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
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stdio.h
001: /* Define ISO C stdio on top of C++ iostreams. 002: Copyright (C) 1991, 1994-2010, 2011 Free Software Foundation, Inc. 003: This file is part of the GNU C Library. 004: 005: The GNU C Library is free software; you can redistribute it and/or 006: modify it under the terms of the GNU Lesser General Public 007: License as published by the Free Software Foundation; either 008: version 2.1 of the License, or (at your option) any later version. 009: 010: The GNU C Library is distributed in the hope that it will be useful, 011: but WITHOUT ANY WARRANTY; without even the implied warranty of 012: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013: Lesser General Public License for more details. 014: 015: You should have received a copy of the GNU Lesser General Public 016: License along with the GNU C Library; if not, write to the Free 017: Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 018: 02111-1307 USA. */ 019: 020: /* 021: * ISO C99 Standard: 7.19 Input/output <stdio.h> 022: */ 023: 024: #ifndef _STDIO_H 025: 026: #if !defined __need_FILE && !defined __need___FILE 027: # define _STDIO_H 1 028: # include <features.h> 029: 030: __BEGIN_DECLS 031: 032: # define __need_size_t 033: # define __need_NULL 034: # include <stddef.h> 035: 036: # include <bits/types.h> 037: # define __need_FILE 038: # define __need___FILE 039: #endif /* Don't need FILE. */ 040: 041: 042: #if !defined __FILE_defined && defined __need_FILE 043: 044: /* Define outside of namespace so the C++ is happy. */ 045: struct _IO_FILE; 046: 047: __BEGIN_NAMESPACE_STD 048: /* The opaque type of streams. This is the definition used elsewhere. */ 049: typedef struct _IO_FILE FILE; 050: __END_NAMESPACE_STD 051: #if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \ 052: || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \ 053: || defined __USE_POSIX2 054: __USING_NAMESPACE_STD(FILE) 055: #endif 056: 057: # define __FILE_defined 1 058: #endif /* FILE not defined. */ 059: #undef __need_FILE 060: 061: 062: #if !defined ____FILE_defined && defined __need___FILE 063: 064: /* The opaque type of streams. This is the definition used elsewhere. */ 065: typedef struct _IO_FILE __FILE; 066: 067: # define ____FILE_defined 1 068: #endif /* __FILE not defined. */ 069: #undef __need___FILE 070: 071: 072: #ifdef _STDIO_H 073: #define _STDIO_USES_IOSTREAM 074: 075: #include <libio.h> 076: 077: #if defined __USE_XOPEN || defined __USE_XOPEN2K8 078: # ifdef __GNUC__ 079: # ifndef _VA_LIST_DEFINED 080: typedef _G_va_list va_list; 081: # define _VA_LIST_DEFINED 082: # endif 083: # else 084: # include <stdarg.h> 085: # endif 086: #endif 087: 088: #ifdef __USE_XOPEN2K8 089: # ifndef __off_t_defined 090: # ifndef __USE_FILE_OFFSET64 091: typedef __off_t off_t; 092: # else 093: typedef __off64_t off_t; 094: # endif 095: # define __off_t_defined 096: # endif 097: # if defined __USE_LARGEFILE64 && !defined __off64_t_defined 098: typedef __off64_t off64_t; 099: # define __off64_t_defined 100: # endif 101: 102: # ifndef __ssize_t_defined 103: typedef __ssize_t ssize_t; 104: # define __ssize_t_defined 105: # endif 106: #endif 107: 108: /* The type of the second argument to `fgetpos' and `fsetpos'. */ 109: __BEGIN_NAMESPACE_STD 110: #ifndef __USE_FILE_OFFSET64 111: typedef _G_fpos_t fpos_t; 112: #else 113: typedef _G_fpos64_t fpos_t; 114: #endif 115: __END_NAMESPACE_STD 116: #ifdef __USE_LARGEFILE64 117: typedef _G_fpos64_t fpos64_t; 118: #endif 119: 120: /* The possibilities for the third argument to `setvbuf'. */ 121: #define _IOFBF 0 /* Fully buffered. */ 122: #define _IOLBF 1 /* Line buffered. */ 123: #define _IONBF 2 /* No buffering. */ 124: 125: 126: /* Default buffer size. */ 127: #ifndef BUFSIZ 128: # define BUFSIZ _IO_BUFSIZ 129: #endif 130: 131: 132: /* End of file character. 133: Some things throughout the library rely on this being -1. */ 134: #ifndef EOF 135: # define EOF (-1) 136: #endif 137: 138: 139: /* The possibilities for the third argument to `fseek'. 140: These values should not be changed. */ 141: #define SEEK_SET 0 /* Seek from beginning of file. */ 142: #define SEEK_CUR 1 /* Seek from current position. */ 143: #define SEEK_END 2 /* Seek from end of file. */ 144: #ifdef __USE_GNU 145: # define SEEK_DATA 3 /* Seek to next data. */ 146: # define SEEK_HOLE 4 /* Seek to next hole. */ 147: #endif 148: 149: 150: #if defined __USE_SVID || defined __USE_XOPEN 151: /* Default path prefix for `tempnam' and `tmpnam'. */ 152: # define P_tmpdir "/tmp" 153: #endif 154: 155: 156: /* Get the values: 157: L_tmpnam How long an array of chars must be to be passed to `tmpnam'. 158: TMP_MAX The minimum number of unique filenames generated by tmpnam 159: (and tempnam when it uses tmpnam's name space), 160: or tempnam (the two are separate). 161: L_ctermid How long an array to pass to `ctermid'. 162: L_cuserid How long an array to pass to `cuserid'. 163: FOPEN_MAX Minimum number of files that can be open at once. 164: FILENAME_MAX Maximum length of a filename. */ 165: #include <bits/stdio_lim.h> 166: 167: 168: /* Standard streams. */ 169: extern struct _IO_FILE *stdin; /* Standard input stream. */ 170: extern struct _IO_FILE *stdout; /* Standard output stream. */ 171: extern struct _IO_FILE *stderr; /* Standard error output stream. */ 172: /* C89/C99 say they're macros. Make them happy. */ 173: #define stdin stdin 174: #define stdout stdout 175: #define stderr stderr 176: 177: __BEGIN_NAMESPACE_STD 178: /* Remove file FILENAME. */ 179: extern int remove (__const char *__filename) __THROW; 180: /* Rename file OLD to NEW. */ 181: extern int rename (__const char *__old, __const char *__new) __THROW; 182: __END_NAMESPACE_STD 183: 184: #ifdef __USE_ATFILE 185: /* Rename file OLD relative to OLDFD to NEW relative to NEWFD. */ 186: extern int renameat (int __oldfd, __const char *__old, int __newfd, 187: __const char *__new) __THROW; 188: #endif 189: 190: __BEGIN_NAMESPACE_STD 191: /* Create a temporary file and open it read/write. 192: 193: This function is a possible cancellation point and therefore not 194: marked with __THROW. */ 195: #ifndef __USE_FILE_OFFSET64 196: extern FILE *tmpfile (void) __wur; 197: #else 198: # ifdef __REDIRECT 199: extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur; 200: # else 201: # define tmpfile tmpfile64 202: # endif 203: #endif 204: 205: #ifdef __USE_LARGEFILE64 206: extern FILE *tmpfile64 (void) __wur; 207: #endif 208: 209: /* Generate a temporary filename. */ 210: extern char *tmpnam (char *__s) __THROW __wur; 211: __END_NAMESPACE_STD 212: 213: #ifdef __USE_MISC 214: /* This is the reentrant variant of `tmpnam'. The only difference is 215: that it does not allow S to be NULL. */ 216: extern char *tmpnam_r (char *__s) __THROW __wur; 217: #endif 218: 219: 220: #if defined __USE_SVID || defined __USE_XOPEN 221: /* Generate a unique temporary filename using up to five characters of PFX 222: if it is not NULL. The directory to put this file in is searched for 223: as follows: First the environment variable "TMPDIR" is checked. 224: If it contains the name of a writable directory, that directory is used. 225: If not and if DIR is not NULL, that value is checked. If that fails, 226: P_tmpdir is tried and finally "/tmp". The storage for the filename 227: is allocated by `malloc'. */ 228: extern char *tempnam (__const char *__dir, __const char *__pfx) 229: __THROW __attribute_malloc__ __wur; 230: #endif 231: 232: 233: __BEGIN_NAMESPACE_STD 234: /* Close STREAM. 235: 236: This function is a possible cancellation point and therefore not 237: marked with __THROW. */ 238: extern int fclose (FILE *__stream); 239: /* Flush STREAM, or all streams if STREAM is NULL. 240: 241: This function is a possible cancellation point and therefore not 242: marked with __THROW. */ 243: extern int fflush (FILE *__stream); 244: __END_NAMESPACE_STD 245: 246: #ifdef __USE_MISC 247: /* Faster versions when locking is not required. 248: 249: This function is not part of POSIX and therefore no official 250: cancellation point. But due to similarity with an POSIX interface 251: or due to the implementation it is a cancellation point and 252: therefore not marked with __THROW. */ 253: extern int fflush_unlocked (FILE *__stream); 254: #endif 255: 256: #ifdef __USE_GNU 257: /* Close all streams. 258: 259: This function is not part of POSIX and therefore no official 260: cancellation point. But due to similarity with an POSIX interface 261: or due to the implementation it is a cancellation point and 262: therefore not marked with __THROW. */ 263: extern int fcloseall (void); 264: #endif 265: 266: 267: __BEGIN_NAMESPACE_STD 268: #ifndef __USE_FILE_OFFSET64 269: /* Open a file and create a new stream for it. 270: 271: This function is a possible cancellation point and therefore not 272: marked with __THROW. */ 273: extern FILE *fopen (__const char *__restrict __filename, 274: __const char *__restrict __modes) __wur; 275: /* Open a file, replacing an existing stream with it. 276: 277: This function is a possible cancellation point and therefore not 278: marked with __THROW. */ 279: extern FILE *freopen (__const char *__restrict __filename, 280: __const char *__restrict __modes, 281: FILE *__restrict __stream) __wur; 282: #else 283: # ifdef __REDIRECT 284: extern FILE *__REDIRECT (fopen, (__const char *__restrict __filename, 285: __const char *__restrict __modes), fopen64) 286: __wur; 287: extern FILE *__REDIRECT (freopen, (__const char *__restrict __filename, 288: __const char *__restrict __modes, 289: FILE *__restrict __stream), freopen64) 290: __wur; 291: # else 292: # define fopen fopen64 293: # define freopen freopen64 294: # endif 295: #endif 296: __END_NAMESPACE_STD 297: #ifdef __USE_LARGEFILE64 298: extern FILE *fopen64 (__const char *__restrict __filename, 299: __const char *__restrict __modes) __wur; 300: extern FILE *freopen64 (__const char *__restrict __filename, 301: __const char *__restrict __modes, 302: FILE *__restrict __stream) __wur; 303: #endif 304: 305: #ifdef __USE_POSIX 306: /* Create a new stream that refers to an existing system file descriptor. */ 307: extern FILE *fdopen (int __fd, __const char *__modes) __THROW __wur; 308: #endif 309: 310: #ifdef __USE_GNU 311: /* Create a new stream that refers to the given magic cookie, 312: and uses the given functions for input and output. */ 313: extern FILE *fopencookie (void *__restrict __magic_cookie, 314: __const char *__restrict __modes, 315: _IO_cookie_io_functions_t __io_funcs) __THROW __wur; 316: #endif 317: 318: #ifdef __USE_XOPEN2K8 319: /* Create a new stream that refers to a memory buffer. */ 320: extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes) 321: __THROW __wur; 322: 323: /* Open a stream that writes into a malloc'd buffer that is expanded as 324: necessary. *BUFLOC and *SIZELOC are updated with the buffer's location 325: and the number of characters written on fflush or fclose. */ 326: extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur; 327: #endif 328: 329: 330: __BEGIN_NAMESPACE_STD 331: /* If BUF is NULL, make STREAM unbuffered. 332: Else make it use buffer BUF, of size BUFSIZ. */ 333: extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW; 334: /* Make STREAM use buffering mode MODE. 335: If BUF is not NULL, use N bytes of it for buffering; 336: else allocate an internal buffer N bytes long. */ 337: extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, 338: int __modes, size_t __n) __THROW; 339: __END_NAMESPACE_STD 340: 341: #ifdef __USE_BSD 342: /* If BUF is NULL, make STREAM unbuffered. 343: Else make it use SIZE bytes of BUF for buffering. */ 344: extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, 345: size_t __size) __THROW; 346: 347: /* Make STREAM line-buffered. */ 348: extern void setlinebuf (FILE *__stream) __THROW; 349: #endif 350: 351: 352: __BEGIN_NAMESPACE_STD 353: /* Write formatted output to STREAM. 354: 355: This function is a possible cancellation point and therefore not 356: marked with __THROW. */ 357: extern int fprintf (FILE *__restrict __stream, 358: __const char *__restrict __format, ...); 359: /* Write formatted output to stdout. 360: 361: This function is a possible cancellation point and therefore not 362: marked with __THROW. */ 363: extern int printf (__const char *__restrict __format, ...); 364: /* Write formatted output to S. */ 365: extern int sprintf (char *__restrict __s, 366: __const char *__restrict __format, ...) __THROWNL; 367: 368: /* Write formatted output to S from argument list ARG. 369: 370: This function is a possible cancellation point and therefore not 371: marked with __THROW. */ 372: extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format, 373: _G_va_list __arg); 374: /* Write formatted output to stdout from argument list ARG. 375: 376: This function is a possible cancellation point and therefore not 377: marked with __THROW. */ 378: extern int vprintf (__const char *__restrict __format, _G_va_list __arg); 379: /* Write formatted output to S from argument list ARG. */ 380: extern int vsprintf (char *__restrict __s, __const char *__restrict __format, 381: _G_va_list __arg) __THROWNL; 382: __END_NAMESPACE_STD 383: 384: #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98 385: __BEGIN_NAMESPACE_C99 386: /* Maximum chars of output to write in MAXLEN. */ 387: extern int snprintf (char *__restrict __s, size_t __maxlen, 388: __const char *__restrict __format, ...) 389: __THROWNL __attribute__ ((__format__ (__printf__, 3, 4))); 390: 391: extern int vsnprintf (char *__restrict __s, size_t __maxlen, 392: __const char *__restrict __format, _G_va_list __arg) 393: __THROWNL __attribute__ ((__format__ (__printf__, 3, 0))); 394: __END_NAMESPACE_C99 395: #endif 396: 397: #ifdef __USE_GNU 398: /* Write formatted output to a string dynamically allocated with `malloc'. 399: Store the address of the string in *PTR. */ 400: extern int vasprintf (char **__restrict __ptr, __const char *__restrict __f, 401: _G_va_list __arg) 402: __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur; 403: extern int __asprintf (char **__restrict __ptr, 404: __const char *__restrict __fmt, ...) 405: __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 406: extern int asprintf (char **__restrict __ptr, 407: __const char *__restrict __fmt, ...) 408: __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur; 409: #endif 410: 411: #ifdef __USE_XOPEN2K8 412: /* Write formatted output to a file descriptor. 413: 414: These functions are not part of POSIX and therefore no official 415: cancellation point. But due to similarity with an POSIX interface 416: or due to the implementation they are cancellation points and 417: therefore not marked with __THROW. */ 418: extern int vdprintf (int __fd, __const char *__restrict __fmt, 419: _G_va_list __arg) 420: __attribute__ ((__format__ (__printf__, 2, 0))); 421: extern int dprintf (int __fd, __const char *__restrict __fmt, ...) 422: __attribute__ ((__format__ (__printf__, 2, 3))); 423: #endif 424: 425: 426: __BEGIN_NAMESPACE_STD 427: /* Read formatted input from STREAM. 428: 429: This function is a possible cancellation point and therefore not 430: marked with __THROW. */ 431: extern int fscanf (FILE *__restrict __stream, 432: __const char *__restrict __format, ...) __wur; 433: /* Read formatted input from stdin. 434: 435: This function is a possible cancellation point and therefore not 436: marked with __THROW. */ 437: extern int scanf (__const char *__restrict __format, ...) __wur; 438: /* Read formatted input from S. */ 439: extern int sscanf (__const char *__restrict __s, 440: __const char *__restrict __format, ...) __THROW; 441: 442: #if defined __USE_ISOC99 && !defined __USE_GNU \ 443: && (!defined __LDBL_COMPAT || !defined __REDIRECT) \ 444: && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K) 445: # ifdef __REDIRECT 446: /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[ 447: GNU extension which conflicts with valid %a followed by letter 448: s, S or [. */ 449: extern int __REDIRECT (fscanf, (FILE *__restrict __stream, 450: __const char *__restrict __format, ...), 451: __isoc99_fscanf) __wur; 452: extern int __REDIRECT (scanf, (__const char *__restrict __format, ...), 453: __isoc99_scanf) __wur; 454: extern int __REDIRECT_NTH (sscanf, (__const char *__restrict __s, 455: __const char *__restrict __format, ...), 456: __isoc99_sscanf); 457: # else 458: extern int __isoc99_fscanf (FILE *__restrict __stream, 459: __const char *__restrict __format, ...) __wur; 460: extern int __isoc99_scanf (__const char *__restrict __format, ...) __wur; 461: extern int __isoc99_sscanf (__const char *__restrict __s, 462: __const char *__restrict __format, ...) __THROW; 463: # define fscanf __isoc99_fscanf 464: # define scanf __isoc99_scanf 465: # define sscanf __isoc99_sscanf 466: # endif 467: #endif 468: 469: __END_NAMESPACE_STD 470: 471: #ifdef __USE_ISOC99 472: __BEGIN_NAMESPACE_C99 473: /* Read formatted input from S into argument list ARG. 474: 475: This function is a possible cancellation point and therefore not 476: marked with __THROW. */ 477: extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, 478: _G_va_list __arg) 479: __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 480: 481: /* Read formatted input from stdin into argument list ARG. 482: 483: This function is a possible cancellation point and therefore not 484: marked with __THROW. */ 485: extern int vscanf (__const char *__restrict __format, _G_va_list __arg) 486: __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 487: 488: /* Read formatted input from S into argument list ARG. */ 489: extern int vsscanf (__const char *__restrict __s, 490: __const char *__restrict __format, _G_va_list __arg) 491: __THROW __attribute__ ((__format__ (__scanf__, 2, 0))); 492: 493: # if !defined __USE_GNU \ 494: && (!defined __LDBL_COMPAT || !defined __REDIRECT) \ 495: && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K) 496: # ifdef __REDIRECT 497: /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[ 498: GNU extension which conflicts with valid %a followed by letter 499: s, S or [. */ 500: extern int __REDIRECT (vfscanf, 501: (FILE *__restrict __s, 502: __const char *__restrict __format, _G_va_list __arg), 503: __isoc99_vfscanf) 504: __attribute__ ((__format__ (__scanf__, 2, 0))) __wur; 505: extern int __REDIRECT (vscanf, (__const char *__restrict __format, 506: _G_va_list __arg), __isoc99_vscanf) 507: __attribute__ ((__format__ (__scanf__, 1, 0))) __wur; 508: extern int __REDIRECT_NTH (vsscanf, 509: (__const char *__restrict __s, 510: __const char *__restrict __format, 511: _G_va_list __arg), __isoc99_vsscanf) 512: __attribute__ ((__format__ (__scanf__, 2, 0))); 513: # else 514: extern int __isoc99_vfscanf (FILE *__restrict __s, 515: __const char *__restrict __format, 516: _G_va_list __arg) __wur; 517: extern int __isoc99_vscanf (__const char *__restrict __format, 518: _G_va_list __arg) __wur; 519: extern int __isoc99_vsscanf (__const char *__restrict __s, 520: __const char *__restrict __format, 521: _G_va_list __arg) __THROW; 522: # define vfscanf __isoc99_vfscanf 523: # define vscanf __isoc99_vscanf 524: # define vsscanf __isoc99_vsscanf 525: # endif 526: # endif 527: 528: __END_NAMESPACE_C99 529: #endif /* Use ISO C9x. */ 530: 531: 532: __BEGIN_NAMESPACE_STD 533: /* Read a character from STREAM. 534: 535: These functions are possible cancellation points and therefore not 536: marked with __THROW. */ 537: extern int fgetc (FILE *__stream); 538: extern int getc (FILE *__stream); 539: 540: /* Read a character from stdin. 541: 542: This function is a possible cancellation point and therefore not 543: marked with __THROW. */ 544: extern int getchar (void); 545: __END_NAMESPACE_STD 546: 547: /* The C standard explicitly says this is a macro, so we always do the 548: optimization for it. */ 549: #define getc(_fp) _IO_getc (_fp) 550: 551: #if defined __USE_POSIX || defined __USE_MISC 552: /* These are defined in POSIX.1:1996. 553: 554: These functions are possible cancellation points and therefore not 555: marked with __THROW. */ 556: extern int getc_unlocked (FILE *__stream); 557: extern int getchar_unlocked (void); 558: #endif /* Use POSIX or MISC. */ 559: 560: #ifdef __USE_MISC 561: /* Faster version when locking is not necessary. 562: 563: This function is not part of POSIX and therefore no official 564: cancellation point. But due to similarity with an POSIX interface 565: or due to the implementation it is a cancellation point and 566: therefore not marked with __THROW. */ 567: extern int fgetc_unlocked (FILE *__stream); 568: #endif /* Use MISC. */ 569: 570: 571: __BEGIN_NAMESPACE_STD 572: /* Write a character to STREAM. 573: 574: These functions are possible cancellation points and therefore not 575: marked with __THROW. 576: 577: These functions is a possible cancellation point and therefore not 578: marked with __THROW. */ 579: extern int fputc (int __c, FILE *__stream); 580: extern int putc (int __c, FILE *__stream); 581: 582: /* Write a character to stdout. 583: 584: This function is a possible cancellation point and therefore not 585: marked with __THROW. */ 586: extern int putchar (int __c); 587: __END_NAMESPACE_STD 588: 589: /* The C standard explicitly says this can be a macro, 590: so we always do the optimization for it. */ 591: #define putc(_ch, _fp) _IO_putc (_ch, _fp) 592: 593: #ifdef __USE_MISC 594: /* Faster version when locking is not necessary. 595: 596: This function is not part of POSIX and therefore no official 597: cancellation point. But due to similarity with an POSIX interface 598: or due to the implementation it is a cancellation point and 599: therefore not marked with __THROW. */ 600: extern int fputc_unlocked (int __c, FILE *__stream); 601: #endif /* Use MISC. */ 602: 603: #if defined __USE_POSIX || defined __USE_MISC 604: /* These are defined in POSIX.1:1996. 605: 606: These functions are possible cancellation points and therefore not 607: marked with __THROW. */ 608: extern int putc_unlocked (int __c, FILE *__stream); 609: extern int putchar_unlocked (int __c); 610: #endif /* Use POSIX or MISC. */ 611: 612: 613: #if defined __USE_SVID || defined __USE_MISC \ 614: || (defined __USE_XOPEN && !defined __USE_XOPEN2K) 615: /* Get a word (int) from STREAM. */ 616: extern int getw (FILE *__stream); 617: 618: /* Write a word (int) to STREAM. */ 619: extern int putw (int __w, FILE *__stream); 620: #endif 621: 622: 623: __BEGIN_NAMESPACE_STD 624: /* Get a newline-terminated string of finite length from STREAM. 625: 626: This function is a possible cancellation point and therefore not 627: marked with __THROW. */ 628: extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) 629: __wur; 630: 631: /* Get a newline-terminated string from stdin, removing the newline. 632: DO NOT USE THIS FUNCTION!! There is no limit on how much it will read. 633: 634: This function is a possible cancellation point and therefore not 635: marked with __THROW. */ 636: extern char *gets (char *__s) __wur; 637: __END_NAMESPACE_STD 638: 639: #ifdef __USE_GNU 640: /* This function does the same as `fgets' but does not lock the stream. 641: 642: This function is not part of POSIX and therefore no official 643: cancellation point. But due to similarity with an POSIX interface 644: or due to the implementation it is a cancellation point and 645: therefore not marked with __THROW. */ 646: extern char *fgets_unlocked (char *__restrict __s, int __n, 647: FILE *__restrict __stream) __wur; 648: #endif 649: 650: 651: #ifdef __USE_XOPEN2K8 652: /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR 653: (and null-terminate it). *LINEPTR is a pointer returned from malloc (or 654: NULL), pointing to *N characters of space. It is realloc'd as 655: necessary. Returns the number of characters read (not including the 656: null terminator), or -1 on error or EOF. 657: 658: These functions are not part of POSIX and therefore no official 659: cancellation point. But due to similarity with an POSIX interface 660: or due to the implementation they are cancellation points and 661: therefore not marked with __THROW. */ 662: extern _IO_ssize_t __getdelim (char **__restrict __lineptr, 663: size_t *__restrict __n, int __delimiter, 664: FILE *__restrict __stream) __wur; 665: extern _IO_ssize_t getdelim (char **__restrict __lineptr, 666: size_t *__restrict __n, int __delimiter, 667: FILE *__restrict __stream) __wur; 668: 669: /* Like `getdelim', but reads up to a newline. 670: 671: This function is not part of POSIX and therefore no official 672: cancellation point. But due to similarity with an POSIX interface 673: or due to the implementation it is a cancellation point and 674: therefore not marked with __THROW. */ 675: extern _IO_ssize_t getline (char **__restrict __lineptr, 676: size_t *__restrict __n, 677: FILE *__restrict __stream) __wur; 678: #endif 679: 680: 681: __BEGIN_NAMESPACE_STD 682: /* Write a string to STREAM. 683: 684: This function is a possible cancellation point and therefore not 685: marked with __THROW. */ 686: extern int fputs (__const char *__restrict __s, FILE *__restrict __stream); 687: 688: /* Write a string, followed by a newline, to stdout. 689: 690: This function is a possible cancellation point and therefore not 691: marked with __THROW. */ 692: extern int puts (__const char *__s); 693: 694: 695: /* Push a character back onto the input buffer of STREAM. 696: 697: This function is a possible cancellation point and therefore not 698: marked with __THROW. */ 699: extern int ungetc (int __c, FILE *__stream); 700: 701: 702: /* Read chunks of generic data from STREAM. 703: 704: This function is a possible cancellation point and therefore not 705: marked with __THROW. */ 706: extern size_t fread (void *__restrict __ptr, size_t __size, 707: size_t __n, FILE *__restrict __stream) __wur; 708: /* Write chunks of generic data to STREAM. 709: 710: This function is a possible cancellation point and therefore not 711: marked with __THROW. */ 712: extern size_t fwrite (__const void *__restrict __ptr, size_t __size, 713: size_t __n, FILE *__restrict __s); 714: __END_NAMESPACE_STD 715: 716: #ifdef __USE_GNU 717: /* This function does the same as `fputs' but does not lock the stream. 718: 719: This function is not part of POSIX and therefore no official 720: cancellation point. But due to similarity with an POSIX interface 721: or due to the implementation it is a cancellation point and 722: therefore not marked with __THROW. */ 723: extern int fputs_unlocked (__const char *__restrict __s, 724: FILE *__restrict __stream); 725: #endif 726: 727: #ifdef __USE_MISC 728: /* Faster versions when locking is not necessary. 729: 730: These functions are not part of POSIX and therefore no official 731: cancellation point. But due to similarity with an POSIX interface 732: or due to the implementation they are cancellation points and 733: therefore not marked with __THROW. */ 734: extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, 735: size_t __n, FILE *__restrict __stream) __wur; 736: extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size, 737: size_t __n, FILE *__restrict __stream); 738: #endif 739: 740: 741: __BEGIN_NAMESPACE_STD 742: /* Seek to a certain position on STREAM. 743: 744: This function is a possible cancellation point and therefore not 745: marked with __THROW. */ 746: extern int fseek (FILE *__stream, long int __off, int __whence); 747: /* Return the current position of STREAM. 748: 749: This function is a possible cancellation point and therefore not 750: marked with __THROW. */ 751: extern long int ftell (FILE *__stream) __wur; 752: /* Rewind to the beginning of STREAM. 753: 754: This function is a possible cancellation point and therefore not 755: marked with __THROW. */ 756: extern void rewind (FILE *__stream); 757: __END_NAMESPACE_STD 758: 759: /* The Single Unix Specification, Version 2, specifies an alternative, 760: more adequate interface for the two functions above which deal with 761: file offset. `long int' is not the right type. These definitions 762: are originally defined in the Large File Support API. */ 763: 764: #if defined __USE_LARGEFILE || defined __USE_XOPEN2K 765: # ifndef __USE_FILE_OFFSET64 766: /* Seek to a certain position on STREAM. 767: 768: This function is a possible cancellation point and therefore not 769: marked with __THROW. */ 770: extern int fseeko (FILE *__stream, __off_t __off, int __whence); 771: /* Return the current position of STREAM. 772: 773: This function is a possible cancellation point and therefore not 774: marked with __THROW. */ 775: extern __off_t ftello (FILE *__stream) __wur; 776: # else 777: # ifdef __REDIRECT 778: extern int __REDIRECT (fseeko, 779: (FILE *__stream, __off64_t __off, int __whence), 780: fseeko64); 781: extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64); 782: # else 783: # define fseeko fseeko64 784: # define ftello ftello64 785: # endif 786: # endif 787: #endif 788: 789: __BEGIN_NAMESPACE_STD 790: #ifndef __USE_FILE_OFFSET64 791: /* Get STREAM's position. 792: 793: This function is a possible cancellation point and therefore not 794: marked with __THROW. */ 795: extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); 796: /* Set STREAM's position. 797: 798: This function is a possible cancellation point and therefore not 799: marked with __THROW. */ 800: extern int fsetpos (FILE *__stream, __const fpos_t *__pos); 801: #else 802: # ifdef __REDIRECT 803: extern int __REDIRECT (fgetpos, (FILE *__restrict __stream, 804: fpos_t *__restrict __pos), fgetpos64); 805: extern int __REDIRECT (fsetpos, 806: (FILE *__stream, __const fpos_t *__pos), fsetpos64); 807: # else 808: # define fgetpos fgetpos64 809: # define fsetpos fsetpos64 810: # endif 811: #endif 812: __END_NAMESPACE_STD 813: 814: #ifdef __USE_LARGEFILE64 815: extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence); 816: extern __off64_t ftello64 (FILE *__stream) __wur; 817: extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos); 818: extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos); 819: #endif 820: 821: __BEGIN_NAMESPACE_STD 822: /* Clear the error and EOF indicators for STREAM. */ 823: extern void clearerr (FILE *__stream) __THROW; 824: /* Return the EOF indicator for STREAM. */ 825: extern int feof (FILE *__stream) __THROW __wur; 826: /* Return the error indicator for STREAM. */ 827: extern int ferror (FILE *__stream) __THROW __wur; 828: __END_NAMESPACE_STD 829: 830: #ifdef __USE_MISC 831: /* Faster versions when locking is not required. */ 832: extern void clearerr_unlocked (FILE *__stream) __THROW; 833: extern int feof_unlocked (FILE *__stream) __THROW __wur; 834: extern int ferror_unlocked (FILE *__stream) __THROW __wur; 835: #endif 836: 837: 838: __BEGIN_NAMESPACE_STD 839: /* Print a message describing the meaning of the value of errno. 840: 841: This function is a possible cancellation point and therefore not 842: marked with __THROW. */ 843: extern void perror (__const char *__s); 844: __END_NAMESPACE_STD 845: 846: /* Provide the declarations for `sys_errlist' and `sys_nerr' if they 847: are available on this system. Even if available, these variables 848: should not be used directly. The `strerror' function provides 849: all the necessary functionality. */ 850: #include <bits/sys_errlist.h> 851: 852: 853: #ifdef __USE_POSIX 854: /* Return the system file descriptor for STREAM. */ 855: extern int fileno (FILE *__stream) __THROW __wur; 856: #endif /* Use POSIX. */ 857: 858: #ifdef __USE_MISC 859: /* Faster version when locking is not required. */ 860: extern int fileno_unlocked (FILE *__stream) __THROW __wur; 861: #endif 862: 863: 864: #if (defined __USE_POSIX2 || defined __USE_SVID || defined __USE_BSD || \ 865: defined __USE_MISC) 866: /* Create a new stream connected to a pipe running the given command. 867: 868: This function is a possible cancellation point and therefore not 869: marked with __THROW. */ 870: extern FILE *popen (__const char *__command, __const char *__modes) __wur; 871: 872: /* Close a stream opened by popen and return the status of its child. 873: 874: This function is a possible cancellation point and therefore not 875: marked with __THROW. */ 876: extern int pclose (FILE *__stream); 877: #endif 878: 879: 880: #ifdef __USE_POSIX 881: /* Return the name of the controlling terminal. */ 882: extern char *ctermid (char *__s) __THROW; 883: #endif /* Use POSIX. */ 884: 885: 886: #ifdef __USE_XOPEN 887: /* Return the name of the current user. */ 888: extern char *cuserid (char *__s); 889: #endif /* Use X/Open, but not issue 6. */ 890: 891: 892: #ifdef __USE_GNU 893: struct obstack; /* See <obstack.h>. */ 894: 895: /* Write formatted output to an obstack. */ 896: extern int obstack_printf (struct obstack *__restrict __obstack, 897: __const char *__restrict __format, ...) 898: __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))); 899: extern int obstack_vprintf (struct obstack *__restrict __obstack, 900: __const char *__restrict __format, 901: _G_va_list __args) 902: __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))); 903: #endif /* Use GNU. */ 904: 905: 906: #if defined __USE_POSIX || defined __USE_MISC 907: /* These are defined in POSIX.1:1996. */ 908: 909: /* Acquire ownership of STREAM. */ 910: extern void flockfile (FILE *__stream) __THROW; 911: 912: /* Try to acquire ownership of STREAM but do not block if it is not 913: possible. */ 914: extern int ftrylockfile (FILE *__stream) __THROW __wur; 915: 916: /* Relinquish the ownership granted for STREAM. */ 917: extern void funlockfile (FILE *__stream) __THROW; 918: #endif /* POSIX || misc */ 919: 920: #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU 921: /* The X/Open standard requires some functions and variables to be 922: declared here which do not belong into this header. But we have to 923: follow. In GNU mode we don't do this nonsense. */ 924: # define __need_getopt 925: # include <getopt.h> 926: #endif /* X/Open, but not issue 6 and not for GNU. */ 927: 928: /* If we are compiling with optimizing read this file. It contains 929: several optimizing inline functions and macros. */ 930: #ifdef __USE_EXTERN_INLINES 931: # include <bits/stdio.h> 932: #endif 933: #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline 934: # include <bits/stdio2.h> 935: #endif 936: #ifdef __LDBL_COMPAT 937: # include <bits/stdio-ldbl.h> 938: #endif 939: 940: __END_DECLS 941: 942: #endif /* <stdio.h> included. */ 943: 944: #endif /* !_STDIO_H */ 945:
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Andrew Scott