567 lines
20 KiB
C
567 lines
20 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI Standard: 4.9 INPUT/OUTPUT <stdio.h>
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*/
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#ifndef _STDIO_H
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#if !defined(__need_FILE)
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#define _STDIO_H 1
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#include <features.h>
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#define __need_size_t
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#define __need_NULL
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#include <stddef.h>
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#include <gnu/types.h>
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#endif /* Don't need FILE. */
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#undef __need_FILE
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#ifndef __FILE_defined
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/* The opaque type of streams. */
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typedef struct __stdio_file FILE;
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#define __FILE_defined 1
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#endif /* FILE not defined. */
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#ifdef _STDIO_H
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/* The type of the second argument to `fgetpos' and `fsetpos'. */
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typedef __off_t fpos_t;
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/* The mode of I/O, as given in the MODE argument to fopen, etc. */
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typedef struct
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{
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unsigned int __read:1; /* Open for reading. */
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unsigned int __write:1; /* Open for writing. */
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unsigned int __append:1; /* Open for appending. */
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unsigned int __binary:1; /* Opened binary. */
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unsigned int __create:1; /* Create the file. */
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unsigned int __exclusive:1; /* Error if it already exists. */
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unsigned int __truncate:1; /* Truncate the file on opening. */
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} __io_mode;
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/* Functions to do I/O and file management for a stream. */
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typedef __ssize_t EXFUN(__io_read, (PTR __cookie, char *__buf,
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size_t __nbytes));
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typedef __ssize_t EXFUN(__io_write, (PTR __cookie, CONST char *__buf,
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size_t __n));
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typedef int EXFUN(__io_seek, (PTR __cookie, fpos_t *__pos, int __w));
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typedef int EXFUN(__io_close, (PTR __cookie));
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/* Low level interface, independent of FILE representation. */
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typedef struct
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{
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__io_read *__read; /* Read bytes. */
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__io_write *__write; /* Write bytes. */
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__io_seek *__seek; /* Seek/tell file position. */
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__io_close *__close; /* Close file. */
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} __io_functions;
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/* Higher level interface, dependent on FILE representation. */
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typedef struct
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{
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/* Make room in the input buffer. */
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int EXFUN((*__input), (FILE *__stream));
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/* Make room in the output buffer. */
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void EXFUN((*__output), (FILE *__stream, int __c));
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} __room_functions;
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extern CONST __io_functions __default_io_functions;
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extern CONST __room_functions __default_room_functions;
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/* Default close function. */
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extern __io_close __stdio_close;
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/* Open FILE with mode M, return cookie or NULL to use an int in *DP. */
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extern PTR EXFUN(__stdio_open, (CONST char *__file, __io_mode __m, int *__dp));
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/* Put out an error message for when stdio needs to die. */
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extern void EXFUN(__stdio_errmsg, (CONST char *__msg, size_t __len));
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/* Generate a unique file name. */
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extern char *EXFUN(__stdio_gen_tempname, (CONST char *__dir, CONST char *__pfx,
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int __dir_search, size_t *__lenptr));
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#ifndef __NORETURN
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#ifdef __GNUC__
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#define __NORETURN __volatile
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#else /* Not GCC. */
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#define __NORETURN
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#endif /* GCC. */
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#endif /* __NORETURN not defined. */
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/* Print out MESSAGE on the error output and abort. */
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extern __NORETURN void EXFUN(__libc_fatal, (CONST char *__message));
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/* The FILE structure. */
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struct __stdio_file
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{
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/* Magic number for validation. Must be negative in open streams
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for the glue to Unix stdio getc/putc to work. */
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int __magic;
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#define _IOMAGIC 0xfedabeeb /* Magic number to fill `__magic'. */
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#define _GLUEMAGIC 0xfeedbabe /* Magic for glued Unix streams. */
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char *__bufp; /* Pointer into the buffer. */
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char *__get_limit; /* Reading limit. */
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char *__put_limit; /* Writing limit. */
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char *__buffer; /* Base of buffer. */
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size_t __bufsize; /* Size of the buffer. */
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FILE *__next; /* Next FILE in the linked list. */
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PTR __cookie; /* Magic cookie. */
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int __fileno; /* System file descriptor. */
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unsigned char __pushback; /* Pushed-back character. */
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char *__pushback_bufp; /* Old bufp if char pushed back. */
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unsigned int __pushed_back:1; /* A char has been pushed back. */
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unsigned int __eof:1; /* End of file encountered. */
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unsigned int __error:1; /* Error encountered. */
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unsigned int __userbuf:1; /* Buffer is from user. */
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unsigned int __linebuf:1; /* Flush on newline. */
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unsigned int __seen:1; /* This stream has been seen. */
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unsigned int __ispipe:1; /* Nonzero if opened by popen. */
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__io_mode __mode; /* File access mode. */
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__io_functions __io_funcs; /* I/O functions. */
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__room_functions __room_funcs; /* I/O buffer room functions. */
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fpos_t __offset; /* Current file position. */
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fpos_t __target; /* Target file position. */
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};
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/* All macros used internally by other macros here and by stdio functions begin
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with `__'. All of these may evaluate their arguments more than once. */
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/* Nonzero if STREAM is a valid stream. */
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#define __validfp(stream) \
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(stream != NULL && ((stream->__magic == _GLUEMAGIC && \
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(stream = (FILE *) &((int *) stream)[1])), \
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(stream->__magic == _IOMAGIC))) \
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/* Clear the error and EOF indicators of STREAM. */
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#define __clearerr(stream) ((stream)->__error = (stream)->__eof = 0)
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/* Nuke STREAM, making it unusable but available for reuse. */
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extern void EXFUN(__invalidate, (FILE *__stream));
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/* Make sure STREAM->__offset and STREAM->__target are initialized.
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Returns 0 if successful, or EOF on
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error (but doesn't set STREAM->__error). */
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extern int EXFUN(__stdio_check_offset, (FILE *__stream));
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/* The possibilities for the third argument to `setvbuf'. */
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#define _IOFBF 0x1 /* Full buffering. */
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#define _IOLBF 0x2 /* Line buffering. */
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#define _IONBF 0x4 /* No buffering. */
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/* Default buffer size. */
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#define BUFSIZ 1024
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/* End of file character.
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Some things throughout the library rely on this being -1. */
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#define EOF (-1)
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/* The possibilities for the third argument to `fseek'.
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These values should not be changed. */
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#define SEEK_SET 0 /* Seek from beginning of file. */
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#define SEEK_CUR 1 /* Seek from current position. */
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#define SEEK_END 2 /* Seek from end of file. */
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#ifdef __USE_SVID
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/* Default path prefix for `tempnam' and `tmpnam'. */
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#define P_tmpdir "/usr/tmp"
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#endif
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/* Get the values:
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L_tmpnam How long an array of chars must be to be passed to `tmpnam'.
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TMP_MAX The minimum number of unique filenames generated by tmpnam
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(and tempnam when it uses tmpnam's name space),
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or tempnam (the two are separate).
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L_ctermid How long an array to pass to `ctermid'.
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L_cuserid How long an array to pass to `cuserid'.
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FOPEN_MAX Mininum number of files that can be open at once.
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FILENAME_MAX Maximum length of a filename. */
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#include <stdio_lim.h>
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/* All the known streams are in a linked list
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linked by the `next' field of the FILE structure. */
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extern FILE *__stdio_head; /* Head of the list. */
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/* Standard streams. */
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extern FILE *stdin, *stdout, *stderr;
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/* Remove file FILENAME. */
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extern int EXFUN(remove, (CONST char *__filename));
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/* Rename file OLD to NEW. */
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extern int EXFUN(rename, (CONST char *__old, CONST char *__new));
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/* Create a temporary file and open it read/write. */
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extern FILE *EXFUN(tmpfile, (NOARGS));
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/* Generate a temporary filename. */
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extern char *EXFUN(tmpnam, (char *__s));
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#ifdef __USE_SVID
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/* Generate a unique temporary filename using up to five characters of PFX
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if it is not NULL. The directory to put this file in is searched for
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as follows: First the environment variable "TMPDIR" is checked.
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If it contains the name of a writable directory, that directory is used.
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If not and if DIR is not NULL, that value is checked. If that fails,
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P_tmpdir is tried and finally "/tmp". The storage for the filename
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is allocated by `malloc'. */
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extern char *EXFUN(tempnam, (CONST char *__dir, CONST char *__pfx));
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#endif
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/* This performs actual output when necessary, flushing
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STREAM's buffer and optionally writing another character. */
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extern int EXFUN(__flshfp, (FILE *__stream, int __c));
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/* Close STREAM, or all streams if STREAM is NULL. */
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extern int EXFUN(fclose, (FILE *__stream));
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/* Flush STREAM, or all streams if STREAM is NULL. */
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extern int EXFUN(fflush, (FILE *__stream));
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/* Open a file and create a new stream for it. */
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extern FILE *EXFUN(fopen, (CONST char *__filename, CONST char *__modes));
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/* Open a file, replacing an existing stream with it. */
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extern FILE *EXFUN(freopen, (CONST char *__filename,
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CONST char *__modes, FILE *__stream));
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/* Return a new, zeroed, stream.
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You must set its cookie and io_mode.
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The first operation will give it a buffer unless you do.
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It will also give it the default functions unless you set the `seen' flag.
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The offset is set to -1, meaning it will be determined by doing a
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stationary seek. You can set it to avoid the initial tell call.
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The target is set to -1, meaning it will be set to the offset
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before the target is needed.
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Returns NULL if a stream can't be created. */
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extern FILE *EXFUN(__newstream, (NOARGS));
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#ifdef __USE_POSIX
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/* Create a new stream that refers to an existing system file descriptor. */
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extern FILE *EXFUN(fdopen, (int __fd, CONST char *__modes));
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#endif
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#ifdef __USE_GNU
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/* Create a new stream that refers to the given magic cookie,
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and uses the given functions for input and output. */
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extern FILE *EXFUN(fopencookie, (PTR __magic_cookie, CONST char *__modes,
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__io_functions __io_functions));
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/* Create a new stream that refers to a memory buffer. */
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extern FILE *EXFUN(fmemopen, (PTR __s, size_t __len, CONST char *__modes));
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/* Open a stream that writes into a malloc'd buffer that is expanded as
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necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
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and the number of characters written on fflush or fclose. */
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extern FILE *EXFUN(open_memstream, (char **__bufloc, size_t *sizeloc));
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#endif
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/* If BUF is NULL, make STREAM unbuffered.
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Else make it use buffer BUF, of size BUFSIZ. */
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extern void EXFUN(setbuf, (FILE *__stream, char *__buf));
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/* Make STREAM use buffering mode MODE.
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If BUF is not NULL, use N bytes of it for buffering;
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else allocate an internal buffer N bytes long. */
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extern int EXFUN(setvbuf, (FILE *__stream, char *__buf,
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int __modes, size_t __n));
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#ifdef __USE_BSD
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/* If BUF is NULL, make STREAM unbuffered.
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Else make it use SIZE bytes of BUF for buffering. */
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extern void EXFUN(setbuffer, (FILE *__stream, char *__buf, size_t __size));
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/* Make STREAM line-buffered. */
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extern void EXFUN(setlinebuf, (FILE *__stream));
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#endif
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/* Write formatted output to STREAM. */
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extern int EXFUN(fprintf, (FILE *__stream, CONST char *__format, ...));
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/* Write formatted output to stdout. */
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extern int EXFUN(printf, (CONST char *__format, ...));
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/* Write formatted output to S. */
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extern int EXFUN(sprintf, (char *__s, CONST char *__format, ...));
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/* Write formatted output to S from argument list ARG. */
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extern int EXFUN(vfprintf, (FILE *__s, CONST char *__format, PTR __arg));
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/* Write formatted output to stdout from argument list ARG. */
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extern int EXFUN(vprintf, (CONST char *__format, PTR __arg));
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/* Write formatted output to S from argument list ARG. */
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extern int EXFUN(vsprintf, (char *__s, CONST char *__format, PTR __arg));
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#ifdef __OPTIMIZE__
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#define vprintf(fmt, arg) vfprintf(stdout, (fmt), (arg))
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#endif /* Optimizing. */
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#ifdef __USE_GNU
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/* Maximum chars of output to write in MAXLEN. */
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extern int EXFUN(snprintf, (char *__s, size_t __maxlen,
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CONST char *__format, ...));
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extern int EXFUN(vsnprintf, (char *__s, size_t __maxlen,
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CONST char *__format, PTR __arg));
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/* Write formatted output to a string dynamically allocated with `malloc'.
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Store the address of the string in *PTR. */
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extern int EXFUN(vasprintf, (char **__ptr, CONST char *__f, PTR __arg));
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extern int EXFUN(asprintf, (char **__ptr, CONST char *__fmt, ...));
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/* Write formatted output to a file descriptor. */
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extern int EXFUN(vdprintf, (int __fd, CONST char *__fmt, PTR __arg));
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extern int EXFUN(dprintf, (int __fd, CONST char *__fmt, ...));
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#endif
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/* Read formatted input from STREAM. */
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extern int EXFUN(fscanf, (FILE *__stream, CONST char *__format, ...));
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/* Read formatted input from stdin. */
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extern int EXFUN(scanf, (CONST char *__format, ...));
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/* Read formatted input from S. */
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extern int EXFUN(sscanf, (CONST char *__s, CONST char *__format, ...));
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#ifdef __USE_GNU
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/* Read formatted input from S into argument list ARG. */
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extern int EXFUN(__vfscanf, (FILE *__s, CONST char *__format,
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PTR __arg));
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extern int EXFUN(vfscanf, (FILE *__s, CONST char *__format,
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PTR __arg));
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/* Read formatted input from stdin into argument list ARG. */
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extern int EXFUN(vscanf, (CONST char *__format, PTR __arg));
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/* Read formatted input from S into argument list ARG. */
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extern int EXFUN(__vsscanf, (CONST char *__s, CONST char *__format,
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PTR __arg));
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extern int EXFUN(vsscanf, (CONST char *__s, CONST char *__format,
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PTR __arg));
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#ifdef __OPTIMIZE__
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#define vfscanf(s, format, arg) __vfscanf((s), (format), (arg))
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#define vscanf(format, arg) __vfscanf(stdin, (format), (arg))
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#define vsscanf(s, format, arg) __vsscanf((s), (format), (arg))
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#endif /* Optimizing. */
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#endif /* Use GNU. */
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/* This does actual reading when necessary, filling STREAM's
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buffer and returning the first character in it. */
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extern int EXFUN(__fillbf, (FILE *__stream));
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/* Read a character from STREAM. */
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extern int EXFUN(fgetc, (FILE *__stream));
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extern int EXFUN(getc, (FILE *__stream));
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/* Read a character from stdin. */
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extern int EXFUN(getchar, (NOARGS));
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/* The C standard explicitly says this can
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re-evaluate its argument, so it does. */
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#define __getc(stream) \
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((stream)->__bufp < (stream)->__get_limit ? \
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(int) ((unsigned char) *(stream)->__bufp++) : __fillbf(stream))
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/* The C standard explicitly says this is a macro,
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so we always do the optimization for it. */
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#define getc(stream) __getc(stream)
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#ifdef __OPTIMIZE__
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#define getchar() __getc(stdin)
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#endif /* Optimizing. */
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/* Write a character to STREAM. */
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extern int EXFUN(fputc, (int __c, FILE *__stream));
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extern int EXFUN(putc, (int __c, FILE *__stream));
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/* Write a character to stdout. */
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extern int EXFUN(putchar, (int __c));
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/* The C standard explicitly says this can
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re-evaluate its arguments, so it does. */
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#define __putc(c, stream) \
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((stream)->__bufp < (stream)->__put_limit ? \
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(int) (unsigned char) (*(stream)->__bufp++ = (unsigned char) (c)) : \
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((stream)->__linebuf && (c) != '\n' && \
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(stream)->__bufp - (stream)->__buffer < (stream)->__bufsize) ? \
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(*(stream)->__bufp++ = (unsigned char) (c)) : \
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__flshfp((stream), (unsigned char) (c)))
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/* The C standard explicitly says this can be a macro,
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so we always do the optimization for it. */
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#define putc(c, stream) __putc((c), (stream))
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#ifdef __OPTIMIZE__
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#define putchar(c) __putc((c), stdout)
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#endif /* Optimizing. */
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#if defined(__USE_SVID) || defined(__USE_MISC)
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/* Get a word (int) from STREAM. */
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extern int EXFUN(getw, (FILE *__stream));
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/* Write a word (int) to STREAM. */
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extern int EXFUN(putw, (int __w, FILE *__stream));
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#endif
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/* Get a newline-terminated string of finite length from STREAM. */
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extern char *EXFUN(fgets, (char *__s, size_t __n, FILE *__stream));
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/* Get a newline-terminated string from stdin, removing the newline.
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DO NOT USE THIS FUNCTION!! There is no limit on how much it will read. */
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extern char *EXFUN(gets, (char *__s));
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#ifdef __USE_GNU
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#include <sys/types.h>
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/* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
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(and null-terminate it). *LINEPTR is a pointer returned from malloc (or
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NULL), pointing to *N characters of space. It is realloc'd as
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necessary. Returns the number of characters read (not including the
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null terminator), or -1 on error or EOF. */
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ssize_t EXFUN(__getdelim, (char **lineptr, size_t *n,
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int delimiter, FILE *stream));
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ssize_t EXFUN(getdelim, (char **lineptr, size_t *n,
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int delimiter, FILE *stream));
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/* Like `getdelim', but reads up to a newline. */
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ssize_t EXFUN(__getline, (char **lineptr, size_t *n, FILE *stream));
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ssize_t EXFUN(getline, (char **lineptr, size_t *n, FILE *stream));
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#ifdef __OPTIMIZE__
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#define getdelim(l, n, d, s) __getdelim ((l), (n), (d), (s))
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#define getline(l, n, s) __getline ((l), (n), (s))
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#define __getline(l, n, stream) __getdelim ((l), (n), '\n', (stream))
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#endif /* Optimizing. */
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#endif
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/* Write a string to STREAM. */
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extern int EXFUN(fputs, (CONST char *__s, FILE *__stream));
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/* Write a string, followed by a newline, to stdout. */
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extern int EXFUN(puts, (CONST char *__s));
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#ifdef __OPTIMIZE__
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#define puts(s) ((fputs((s), stdout) || __putc('\n', stdout) == EOF) ? EOF : 0)
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#endif /* Optimizing. */
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/* Push a character back onto the input buffer of STREAM. */
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extern int EXFUN(ungetc, (int __c, FILE *__stream));
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/* Read chunks of generic data from STREAM. */
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extern size_t EXFUN(fread, (PTR __ptr, size_t __size,
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size_t __n, FILE *__stream));
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/* Write chunks of generic data to STREAM. */
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extern size_t EXFUN(fwrite, (CONST PTR __ptr, size_t __size,
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size_t __n, FILE *__s));
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/* Seek to a certain position on STREAM. */
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extern int EXFUN(fseek, (FILE *__stream, long int __off, int __whence));
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/* Return the current position of STREAM. */
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extern long int EXFUN(ftell, (FILE *__stream));
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/* Rewind to the beginning of STREAM. */
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extern void EXFUN(rewind, (FILE *__stream));
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/* Get STREAM's position. */
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extern int EXFUN(fgetpos, (FILE *__stream, fpos_t *__pos));
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/* Set STREAM's position. */
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extern int EXFUN(fsetpos, (FILE *__stream, CONST fpos_t *__pos));
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/* Clear the error and EOF indicators for STREAM. */
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extern void EXFUN(clearerr, (FILE *__stream));
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/* Return the EOF indicator for STREAM. */
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extern int EXFUN(feof, (FILE *__stream));
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/* Return the error indicator for STREAM. */
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extern int EXFUN(ferror, (FILE *__stream));
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#ifdef __OPTIMIZE__
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#define feof(stream) ((stream)->__eof != 0)
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#define ferror(stream) ((stream)->__error != 0)
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#endif /* Optimizing. */
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/* Print a message describing the meaning of the value of errno. */
|
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extern void EXFUN(perror, (CONST char *__s));
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#ifdef __USE_MISC
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/* Print a message describing the meaning of the given signal number. */
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extern void EXFUN(psignal, (int __sig, CONST char *__s));
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#endif /* Non strict ANSI and not POSIX only. */
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#ifdef __USE_POSIX
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/* Return the system file descriptor for STREAM. */
|
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extern int EXFUN(fileno, (CONST FILE *__stream));
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|
#ifdef __OPTIMIZE__
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|
/* The `+ 0' makes this not be an lvalue, so it can't be changed. */
|
|
#define fileno(stream) ((stream)->__fileno + 0)
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#endif /* Optimizing. */
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|
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#endif /* Use POSIX. */
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|
|
#if (defined (__USE_POSIX2) || defined(__USE_SVID) || defined(__USE_BSD) || \
|
|
defined(__USE_MISC))
|
|
/* Create a new stream connected to a pipe running the given command. */
|
|
extern FILE *EXFUN(popen, (CONST char *__command, CONST char *__modes));
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/* Close a stream opened by popen and return the status of its child. */
|
|
extern int EXFUN(pclose, (FILE *__stream));
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#endif
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#ifdef __USE_POSIX
|
|
/* Return the name of the controlling terminal. */
|
|
extern char *EXFUN(ctermid, (char *__s));
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|
/* Return the name of the current user. */
|
|
extern char *EXFUN(cuserid, (char *__s));
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#endif
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#endif /* <stdio.h> included. */
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#endif /* stdio.h */
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