ungetc.c

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

/*************************************************************
 * File: lib/ungetc.c
 * Purpose: Part of C runtime library
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970304	Start of revision history
 */

#include <stdio.h>

/*************************************************************
*  ungetc(c,fp) unget a char
*/
ungetc(c,fp)
int c;
FILE *fp;
{

if (c == EOF) return(EOF);
fp->ptr--;
*fp->ptr = c;
fp->cnt++;
return(c);
}