str2cc.c

来自「mips架构的bootloader,99左右的版本 但源代码现在没人更新了」· C语言 代码 · 共 26 行

/*************************************************************
 * File: lib/str2cc.c
 * Purpose: Part of C runtime library
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970304	Start of revision history
 */

#include "string.h"

/** str2cc(p) convert the string p into a control char */
str2cc(p)
char *p;
{
int len;

if (!p) return(0);
len = strlen(p);
if (len < 1 || len > 2) return(0);
if (len == 1) return(p[0]);
if (p[1] < 'A' || p[1] > '~') return(0);
if (p[0] != '^') return(0);
return(p[1]&0x1f);
}