18c1325ffSbostic /*- 28c1325ffSbostic * Copyright (c) 1990 The Regents of the University of California. 38c1325ffSbostic * All rights reserved. 46db880efSdist * 58c1325ffSbostic * This code is derived from software contributed to Berkeley by 68c1325ffSbostic * Chris Torek. 78c1325ffSbostic * 88c1325ffSbostic * %sccs.include.redist.c% 98c1325ffSbostic * 10*552d4617Sbostic * @(#)stdio.h 5.18 (Berkeley) 07/31/91 116db880efSdist */ 126db880efSdist 138c1325ffSbostic #ifndef _STDIO_H_ 148c1325ffSbostic #define _STDIO_H_ 158c1325ffSbostic 167bde068dSbostic #include <sys/cdefs.h> 178c1325ffSbostic 182b9924ebSbostic #include <machine/ansi.h> 198c1325ffSbostic #ifdef _SIZE_T_ 208c1325ffSbostic typedef _SIZE_T_ size_t; 218c1325ffSbostic #undef _SIZE_T_ 228c1325ffSbostic #endif 238c1325ffSbostic 24a8c24cc3Sbostic #ifndef NULL 25a8c24cc3Sbostic #define NULL 0 26a8c24cc3Sbostic #endif 27a8c24cc3Sbostic 288c1325ffSbostic typedef long fpos_t; /* Must match off_t <sys/types.h> */ 295fb3de76Stoy 308c1325ffSbostic #define _FSTDIO /* Define for new stdio with functions. */ 315fb3de76Stoy 327bde068dSbostic /* 337bde068dSbostic * NB: to fit things in six character monocase externals, the stdio 347bde068dSbostic * code uses the prefix `__s' for stdio objects, typically followed 357bde068dSbostic * by a three-character attempt at a mnemonic. 367bde068dSbostic */ 377bde068dSbostic 388c1325ffSbostic /* stdio buffers */ 398c1325ffSbostic struct __sbuf { 408c1325ffSbostic unsigned char *_base; 418c1325ffSbostic int _size; 428c1325ffSbostic }; 435fb3de76Stoy 448c1325ffSbostic /* 458c1325ffSbostic * stdio state variables. 468c1325ffSbostic * 478c1325ffSbostic * The following always hold: 488c1325ffSbostic * 498c1325ffSbostic * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 508c1325ffSbostic * _lbfsize is -_bf._size, else _lbfsize is 0 518c1325ffSbostic * if _flags&__SRD, _w is 0 528c1325ffSbostic * if _flags&__SWR, _r is 0 538c1325ffSbostic * 548c1325ffSbostic * This ensures that the getc and putc macros (or inline functions) never 558c1325ffSbostic * try to write or read from a file that is in `read' or `write' mode. 568c1325ffSbostic * (Moreover, they can, and do, automatically switch from read mode to 578c1325ffSbostic * write mode, and back, on "r+" and "w+" files.) 588c1325ffSbostic * 598c1325ffSbostic * _lbfsize is used only to make the inline line-buffered output stream 608c1325ffSbostic * code as compact as possible. 618c1325ffSbostic * 628c1325ffSbostic * _ub, _up, and _ur are used when ungetc() pushes back more characters 638c1325ffSbostic * than fit in the current _bf, or when ungetc() pushes back a character 648c1325ffSbostic * that does not match the previous one in _bf. When this happens, 658c1325ffSbostic * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 668c1325ffSbostic * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 678c1325ffSbostic */ 688c1325ffSbostic typedef struct __sFILE { 698c1325ffSbostic unsigned char *_p; /* current position in (some) buffer */ 708c1325ffSbostic int _r; /* read space left for getc() */ 718c1325ffSbostic int _w; /* write space left for putc() */ 728c1325ffSbostic short _flags; /* flags, below; this FILE is free if 0 */ 738c1325ffSbostic short _file; /* fileno, if Unix descriptor, else -1 */ 748c1325ffSbostic struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 758c1325ffSbostic int _lbfsize; /* 0 or -_bf._size, for inline putc */ 768c1325ffSbostic 778c1325ffSbostic /* operations */ 788c1325ffSbostic void *_cookie; /* cookie passed to io functions */ 79e505d896Sdonn int (*_close) __P((void *)); 80e505d896Sdonn int (*_read) __P((void *, char *, int)); 81e505d896Sdonn fpos_t (*_seek) __P((void *, fpos_t, int)); 82e505d896Sdonn int (*_write) __P((void *, const char *, int)); 83cbae850eSkfall 848c1325ffSbostic /* separate buffer for long sequences of ungetc() */ 858c1325ffSbostic struct __sbuf _ub; /* ungetc buffer */ 868c1325ffSbostic unsigned char *_up; /* saved _p when _p is doing ungetc data */ 878c1325ffSbostic int _ur; /* saved _r when _r is counting ungetc data */ 888c1325ffSbostic 898c1325ffSbostic /* tricks to meet minimum requirements even when malloc() fails */ 908c1325ffSbostic unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 918c1325ffSbostic unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 928c1325ffSbostic 938c1325ffSbostic /* separate buffer for fgetline() when line crosses buffer boundary */ 948c1325ffSbostic struct __sbuf _lb; /* buffer for fgetline() */ 958c1325ffSbostic 968c1325ffSbostic /* Unix stdio files get aligned to block boundaries on fseek() */ 978c1325ffSbostic int _blksize; /* stat.st_blksize (may be != _bf._size) */ 988c1325ffSbostic int _offset; /* current lseek offset */ 998c1325ffSbostic } FILE; 1008c1325ffSbostic 1014b0a96f3Sdonn __BEGIN_DECLS 1028c1325ffSbostic extern FILE __sF[]; 1034b0a96f3Sdonn __END_DECLS 1048c1325ffSbostic 1058c1325ffSbostic #define __SLBF 0x0001 /* line buffered */ 1068c1325ffSbostic #define __SNBF 0x0002 /* unbuffered */ 1078c1325ffSbostic #define __SRD 0x0004 /* OK to read */ 1088c1325ffSbostic #define __SWR 0x0008 /* OK to write */ 1098c1325ffSbostic /* RD and WR are never simultaneously asserted */ 1108c1325ffSbostic #define __SRW 0x0010 /* open for reading & writing */ 1118c1325ffSbostic #define __SEOF 0x0020 /* found EOF */ 1128c1325ffSbostic #define __SERR 0x0040 /* found error */ 1138c1325ffSbostic #define __SMBF 0x0080 /* _buf is from malloc */ 1148c1325ffSbostic #define __SAPP 0x0100 /* fdopen()ed in append mode */ 1158c1325ffSbostic #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 1168c1325ffSbostic #define __SOPT 0x0400 /* do fseek() optimisation */ 1178c1325ffSbostic #define __SNPT 0x0800 /* do not do fseek() optimisation */ 1188c1325ffSbostic #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 1198c1325ffSbostic #define __SMOD 0x2000 /* true => fgetline modified _p text */ 1208c1325ffSbostic 1218c1325ffSbostic /* 1228c1325ffSbostic * The following three definitions are for ANSI C, which took them 1238c1325ffSbostic * from System V, which brilliantly took internal interface macros and 1248c1325ffSbostic * made them official arguments to setvbuf(), without renaming them. 1258c1325ffSbostic * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 1268c1325ffSbostic * 1278c1325ffSbostic * Although numbered as their counterparts above, the implementation 1288c1325ffSbostic * does not rely on this. 1298c1325ffSbostic */ 1308c1325ffSbostic #define _IOFBF 0 /* setvbuf should set fully buffered */ 1318c1325ffSbostic #define _IOLBF 1 /* setvbuf should set line buffered */ 1328c1325ffSbostic #define _IONBF 2 /* setvbuf should set unbuffered */ 1338c1325ffSbostic 1348c1325ffSbostic #define BUFSIZ 1024 /* size of buffer used by setbuf */ 1358c1325ffSbostic #define EOF (-1) 1368c1325ffSbostic 1378c1325ffSbostic /* 1388c1325ffSbostic * FOPEN_MAX is a minimum maximum, and should be the number of descriptors 1398c1325ffSbostic * that the kernel can provide without allocation of a resource that can 1408c1325ffSbostic * fail without the process sleeping. Do not use this for anything. 1418c1325ffSbostic */ 1428c1325ffSbostic #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 1438c1325ffSbostic #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 1448c1325ffSbostic 1458c1325ffSbostic /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 1468c1325ffSbostic #ifndef _ANSI_SOURCE 147e57e7607Sbostic #define P_tmpdir "/var/tmp/" 1488c1325ffSbostic #endif 1498c1325ffSbostic #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 1508c1325ffSbostic #define TMP_MAX 308915776 1518c1325ffSbostic 1528c1325ffSbostic #ifndef SEEK_SET 1538c1325ffSbostic #define SEEK_SET 0 /* set file offset to offset */ 1548c1325ffSbostic #endif 1558c1325ffSbostic #ifndef SEEK_CUR 1568c1325ffSbostic #define SEEK_CUR 1 /* set file offset to current plus offset */ 1578c1325ffSbostic #endif 1588c1325ffSbostic #ifndef SEEK_END 1598c1325ffSbostic #define SEEK_END 2 /* set file offset to EOF plus offset */ 1608c1325ffSbostic #endif 1618c1325ffSbostic 1628c1325ffSbostic #define stdin (&__sF[0]) 1638c1325ffSbostic #define stdout (&__sF[1]) 1648c1325ffSbostic #define stderr (&__sF[2]) 1658c1325ffSbostic 1668c1325ffSbostic /* 1678c1325ffSbostic * Functions defined in ANSI C standard. 1688c1325ffSbostic */ 1697bde068dSbostic __BEGIN_DECLS 1707bde068dSbostic void clearerr __P((FILE *)); 1717bde068dSbostic int fclose __P((FILE *)); 1727bde068dSbostic int feof __P((FILE *)); 1737bde068dSbostic int ferror __P((FILE *)); 1747bde068dSbostic int fflush __P((FILE *)); 1757bde068dSbostic int fgetc __P((FILE *)); 1767bde068dSbostic int fgetpos __P((FILE *, fpos_t *)); 1777bde068dSbostic char *fgets __P((char *, size_t, FILE *)); 178e505d896Sdonn FILE *fopen __P((const char *, const char *)); 1797bde068dSbostic int fprintf __P((FILE *, const char *, ...)); 1807bde068dSbostic int fputc __P((int, FILE *)); 1817bde068dSbostic int fputs __P((const char *, FILE *)); 182e505d896Sdonn int fread __P((void *, size_t, size_t, FILE *)); 183e505d896Sdonn FILE *freopen __P((const char *, const char *, FILE *)); 1847bde068dSbostic int fscanf __P((FILE *, const char *, ...)); 1857bde068dSbostic int fseek __P((FILE *, long, int)); 1867bde068dSbostic int fsetpos __P((FILE *, const fpos_t *)); 1877bde068dSbostic long ftell __P((const FILE *)); 188e505d896Sdonn int fwrite __P((const void *, size_t, size_t, FILE *)); 1897bde068dSbostic int getc __P((FILE *)); 1907bde068dSbostic int getchar __P((void)); 1917bde068dSbostic char *gets __P((char *)); 192d603dd2eSbostic #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 193d603dd2eSbostic extern int sys_nerr; /* perror(3) external variables */ 194d603dd2eSbostic extern char *sys_errlist[]; 195d603dd2eSbostic #endif 1967bde068dSbostic void perror __P((const char *)); 1977bde068dSbostic int printf __P((const char *, ...)); 1987bde068dSbostic int putc __P((int, FILE *)); 1997bde068dSbostic int putchar __P((int)); 2007bde068dSbostic int puts __P((const char *)); 2017bde068dSbostic int remove __P((const char *)); 202e505d896Sdonn int rename __P((const char *, const char *)); 2037bde068dSbostic void rewind __P((FILE *)); 2047bde068dSbostic int scanf __P((const char *, ...)); 2057bde068dSbostic void setbuf __P((FILE *, char *)); 2067bde068dSbostic int setvbuf __P((FILE *, char *, int, size_t)); 2077bde068dSbostic int sprintf __P((char *, const char *, ...)); 2087bde068dSbostic int sscanf __P((char *, const char *, ...)); 2097bde068dSbostic FILE *tmpfile __P((void)); 2107bde068dSbostic char *tmpnam __P((char *)); 2117bde068dSbostic int ungetc __P((int, FILE *)); 2127bde068dSbostic int vfprintf __P((FILE *, const char *, _VA_LIST_)); 2137bde068dSbostic int vprintf __P((const char *, _VA_LIST_)); 2147bde068dSbostic int vsprintf __P((char *, const char *, _VA_LIST_)); 2157bde068dSbostic __END_DECLS 2168c1325ffSbostic 2178c1325ffSbostic /* 2188c1325ffSbostic * Functions defined in POSIX 1003.1. 2198c1325ffSbostic */ 2208c1325ffSbostic #ifndef _ANSI_SOURCE 2218c1325ffSbostic #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ 2228c1325ffSbostic #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ 2238c1325ffSbostic 2247bde068dSbostic __BEGIN_DECLS 2250db5e65cSbostic char *ctermid __P((char *)); 2267bde068dSbostic FILE *fdopen __P((int, const char *)); 2277bde068dSbostic int fileno __P((FILE *)); 2287bde068dSbostic __END_DECLS 229e505d896Sdonn #endif /* not ANSI */ 2308c1325ffSbostic 2318c1325ffSbostic /* 2328c1325ffSbostic * Routines that are purely local. 2338c1325ffSbostic */ 234e505d896Sdonn #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 2357bde068dSbostic __BEGIN_DECLS 2367bde068dSbostic char *fgetline __P((FILE *, size_t *)); 2377bde068dSbostic int fpurge __P((FILE *)); 2387bde068dSbostic int getw __P((FILE *)); 2397bde068dSbostic int pclose __P((FILE *)); 240e505d896Sdonn FILE *popen __P((const char *, const char *)); 2417bde068dSbostic int putw __P((int, FILE *)); 2427bde068dSbostic void setbuffer __P((FILE *, char *, int)); 2437bde068dSbostic int setlinebuf __P((FILE *)); 244e57e7607Sbostic char *tempnam __P((const char *, const char *)); 2457bde068dSbostic int snprintf __P((char *, size_t, const char *, ...)); 2467bde068dSbostic int vsnprintf __P((char *, size_t, const char *, _VA_LIST_)); 2475d95f126Sdonn int vscanf __P((const char *, _VA_LIST_)); 2485d95f126Sdonn int vsscanf __P((const char *, const char *, _VA_LIST_)); 2497bde068dSbostic __END_DECLS 2508c1325ffSbostic 2518c1325ffSbostic /* 252433618cdSdonn * This is a #define because the function is used internally and 253433618cdSdonn * (unlike vfscanf) the name __svfscanf is guaranteed not to collide 254433618cdSdonn * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined. 255433618cdSdonn */ 256433618cdSdonn #define vfscanf __svfscanf 257433618cdSdonn 258433618cdSdonn /* 2598c1325ffSbostic * Stdio function-access interface. 2608c1325ffSbostic */ 2617bde068dSbostic __BEGIN_DECLS 262e505d896Sdonn FILE *funopen __P((const void *, 263e505d896Sdonn int (*)(void *, char *, int), 264e505d896Sdonn int (*)(void *, const char *, int), 265e505d896Sdonn fpos_t (*)(void *, fpos_t, int), 266e505d896Sdonn int (*)(void *))); 2677bde068dSbostic __END_DECLS 2688c1325ffSbostic #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 2698c1325ffSbostic #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 2704b0a96f3Sdonn #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 2718c1325ffSbostic 2728c1325ffSbostic /* 2738c1325ffSbostic * Functions internal to the implementation. 2748c1325ffSbostic */ 2754b0a96f3Sdonn __BEGIN_DECLS 2767bde068dSbostic int __srget __P((FILE *)); 277433618cdSdonn int __svfscanf __P((FILE *, const char *, _VA_LIST_)); 2787bde068dSbostic int __swbuf __P((int, FILE *)); 2794b0a96f3Sdonn __END_DECLS 2808c1325ffSbostic 2818c1325ffSbostic /* 2828c1325ffSbostic * The __sfoo macros are here so that we can 2838c1325ffSbostic * define function versions in the C library. 2848c1325ffSbostic */ 2858c1325ffSbostic #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 286433618cdSdonn #if defined(__GNUC__) && defined(__STDC__) 287*552d4617Sbostic static __inline int __sputc(int _c, FILE *_p) { 2888c1325ffSbostic if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 2898c1325ffSbostic return (*_p->_p++ = _c); 2908c1325ffSbostic else 2918c1325ffSbostic return (__swbuf(_c, _p)); 2928c1325ffSbostic } 2938c1325ffSbostic #else 2948c1325ffSbostic /* 2958c1325ffSbostic * This has been tuned to generate reasonable code on the vax using pcc. 2968c1325ffSbostic */ 2978c1325ffSbostic #define __sputc(c, p) \ 2988c1325ffSbostic (--(p)->_w < 0 ? \ 2998c1325ffSbostic (p)->_w >= (p)->_lbfsize ? \ 3008c1325ffSbostic (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 3018c1325ffSbostic (int)*(p)->_p++ : \ 3028c1325ffSbostic __swbuf('\n', p) : \ 3038c1325ffSbostic __swbuf((int)(c), p) : \ 3048c1325ffSbostic (*(p)->_p = (c), (int)*(p)->_p++)) 3058c1325ffSbostic #endif 3068c1325ffSbostic 3078c1325ffSbostic #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 3088c1325ffSbostic #define __sferror(p) (((p)->_flags & __SERR) != 0) 3098c1325ffSbostic #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 3108c1325ffSbostic #define __sfileno(p) ((p)->_file) 3118c1325ffSbostic 3128c1325ffSbostic #define feof(p) __sfeof(p) 3138c1325ffSbostic #define ferror(p) __sferror(p) 3148c1325ffSbostic #define clearerr(p) __sclearerr(p) 3158c1325ffSbostic 3168c1325ffSbostic #ifndef _ANSI_SOURCE 3178c1325ffSbostic #define fileno(p) __sfileno(p) 3188c1325ffSbostic #endif 3198c1325ffSbostic 3208c1325ffSbostic #ifndef lint 3218c1325ffSbostic #define getc(fp) __sgetc(fp) 3228c1325ffSbostic #define putc(x, fp) __sputc(x, fp) 3238c1325ffSbostic #endif /* lint */ 3248c1325ffSbostic 3258c1325ffSbostic #define getchar() getc(stdin) 3268c1325ffSbostic #define putchar(x) putc(x, stdout) 3278c1325ffSbostic #endif /* _STDIO_H_ */ 328