pstring.c

自己写的一个基于kb9202开发板的bootloader

#include "pstring.h"

int p_strlen(char* s){
	int i=0;
	while( s[i]!='\0' )
		i++;
	return i;
}

int p_strcmp(char *s1, char *s2){
	int i=0;
	while(1){
		if( s1[i]!=s2[i] )
			return 0;
		if( s1[i]==0 )
			return 1;
		i++;
	}
}

void p_memset(char *buffer, char value, int size){
	if( size<=0 )
		return;
	while(size--)
		*buffer++ = value;
}

void p_hexToChar(unsigned char value, hex_ch *buf){
	unsigned char tmp = value & 0xf;
	buf->low  = tmp>=10?(tmp-10+'a'):(tmp+'0');
	tmp = value>>4;
	buf->high = tmp>=10?(tmp-10+'a'):(tmp+'0');
}

char p_charToHex(char ch){
	if( ch<='9' && ch>='0' )
		return ch-'0';
	if( ch<='f' && ch>='a' )
		return ch-'a'+10;
	if( ch<='F' && ch>='A' )
		return ch-'A'+10;
	return -1;
}

int p_strToInt(char* str, unsigned *value){
	signed char tmp, i=0;
	*value = 0;
	if( str[0]!='0' || str[1]!='x' && str[1]!='X' )
		return -1;
	while( str[i]!='\0' ){
		*value <<= 4;
		tmp = (signed char)p_charToHex(str[i++]);
		if( tmp==-1 || i>8)
			return -1;
		*value += tmp;
	}
	return 1;
}

char* p_strcpy(char *src, char *dst){
	while(*src)
		*dst++ = *src++;
	*dst++ = *src;
	return dst;
}

void p_memcpy(char *src, char *dst, int size){
	while(size-->0)
		*dst++ = *src++;
}

int p_memcmp(char *s1, char *s2, int size){
	while( size-- ){
		if( *s1++ != *s2++ )
			return 0;
	}
	return 1;
}

int p_IsWhiteSpace(char cValue){
	return ( (cValue==' ') || (cValue=='\t') || (cValue=='\0') || (cValue=='\r') || (cValue=='\n') );
}