vfprintf.c

来自「OMAP1030 处理器的ARM 侧硬件测试代码 OMAP1030 是TI」· C语言 代码 · 共 53 行

/*****************************************************************************/
/*  VFRINTF.C v2.24                                                         */
/*  Copyright (c) 1995-2002 Texas Instruments Incorporated                   */
/*****************************************************************************/

/*****************************************************************************/
/* Functions:                                                                */
/*    VFPRINTF -  Print formatted output to a stream                         */
/*    _OUTC    -  Put a character in a stream                                */
/*    _OUTS    -  Put a string in a stream                                   */
/*****************************************************************************/
#include "format.h"
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
 
extern int _printfi(char **_format, va_list _ap, void *_op, 
                    int (*_outc)(char, void *), int (*_outs)(char *, void *));
 
static int _outc(char c, void *_op);
static int _outs(char *s, void *_op);
 
/*****************************************************************************/
/* VFPRINTF -  Print formatted output to a stream                            */
/*                                                                           */
/*    This function passes a the format string and an argument list to       */
/*    _PRINTFI, and writes the result string to the stream _FP.              */
/*                                                                           */
/*****************************************************************************/
_CODE_ACCESS int vfprintf(FILE *_fp, const char *_format, va_list _ap)
{
   char *fptr = (char *)_format;

   /*------------------------------------------------------------------------*/
   /* If the current stream is not associated with a file, return an error.  */
   /*------------------------------------------------------------------------*/
   if(_fp->fd == -1) return (-1);

   return (_printfi(&fptr, _ap, (void *)_fp, _outc, _outs));
 
}
 
/*****************************************************************************/
/* _OUTC -  Put a character in a stream                                      */
/*****************************************************************************/
static int _outc(char c, void *_op) { return (fputc(c, (FILE *)_op)); }
 
/*****************************************************************************/
/* _OUTS -  Put a string in a stream                                         */
/*****************************************************************************/
static int _outs(char *s, void *_op) { return (fputs(s, (FILE *)_op)); }