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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [fgetc.c] - Rev 262
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/* * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* FUNCTION <<fgetc>>---get a character from a file or stream INDEX fgetc INDEX _fgetc_r ANSI_SYNOPSIS #include <stdio.h> int fgetc(FILE *<[fp]>); #include <stdio.h> int _fgetc_r(struct _reent *<[ptr]>, FILE *<[fp]>); TRAD_SYNOPSIS #include <stdio.h> int fgetc(<[fp]>) FILE *<[fp]>; #include <stdio.h> int _fgetc_r(<[ptr]>, <[fp]>) struct _reent *<[ptr]>; FILE *<[fp]>; DESCRIPTION Use <<fgetc>> to get the next single character from the file or stream identified by <[fp]>. As a side effect, <<fgetc>> advances the file's current position indicator. For a macro version of this function, see <<getc>>. The function <<_fgetc_r>> is simply a reentrant version of <<fgetc>> that is passed the additional reentrant structure pointer argument: <[ptr]>. RETURNS The next character (read as an <<unsigned char>>, and cast to <<int>>), unless there is no more data, or the host system reports a read error; in either of these situations, <<fgetc>> returns <<EOF>>. You can distinguish the two situations that cause an <<EOF>> result by using the <<ferror>> and <<feof>> functions. PORTABILITY ANSI C requires <<fgetc>>. Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, <<lseek>>, <<read>>, <<sbrk>>, <<write>>. */ #include <_ansi.h> #include <stdio.h> #include "local.h" int _DEFUN(_fgetc_r, (ptr, fp), struct _reent * ptr _AND FILE * fp) { int result; CHECK_INIT(ptr, fp); _flockfile (fp); result = __sgetc_r (ptr, fp); _funlockfile (fp); return result; } #ifndef _REENT_ONLY int _DEFUN(fgetc, (fp), FILE * fp) { #if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__) int result; CHECK_INIT(_REENT, fp); __sfp_lock_acquire (); _flockfile (fp); result = __sgetc_r (_REENT, fp); _funlockfile (fp); __sfp_lock_release (); return result; #else return _fgetc_r (_REENT, fp); #endif } #endif /* !_REENT_ONLY */
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