#include "app_cfg.h"



#include <stdlib.h>



#ifndef USE_BUILDIN_STRING_H





int strlen(const char *str)

{

	const char *p = str;

	

	while (*p)p++;

	return (int)(p - str);

}



int strcmp(const char *str0, const char *str1)

{

	for (; *str0 && *str1 && *str0 == *str1; str0++, str1++);

	return (*str0 - *str1);

}



char* strcpy(char *dest, const char *source)

{

	char *p = dest;

	

	if (*source)

	{

		while ((*p++ = *source++));

		*p = '\0';

	}

	return dest;

}



char* strncpy(char *dest, const char *source, int len)

{

	char *p = dest;

	

	if (*source)

	{

		while (len-- && (*p++ = *source++));

		*p = '\0';

	}

	return dest;

}



char* strchr(const char *str, int c)

{

	while (*str && *str != (char)c) str++;

	return (*str == (char)c) ? (char *)str : (char *)NULL;

}



char* strstr(const char *str, const char *substr)

{

	char *pstr, *psub;

	

	if (!*substr)

		return (char *)NULL;

	while (*str)

	{

		pstr = (char *)str;

		psub = (char *)substr;

		do {

			if (!*psub) return pstr;

		} while (*pstr++ == *psub++);

		str++;

	}

	return (char *)NULL;

}



char* strcat(char *dest, const char *source)

{

	char *p = dest;

	

	while (*p)p++;

	while ((*p++ = *source++));

	return dest;

}



char* strncat(char *dest, const char *source, int len)

{

	char *p = dest;

	

	while (*p)p++;

	while (len-- && (*p++ = *source++));

	return dest;

}



char* strdup(const char *source)

{

	char *p = (char *)malloc(strlen(source) + 1);

	return strcpy(p, source);

}



void* memcpy(void *dest, const void *source, int len)

{

	char *p = dest;

	

	while(len--)

		*(char*)p++ = *(char*)source++;

	return dest;

}



int memcmp(const void *m0, const void *m1, int len)

{

	const char *u8_0 = (const char *)m0;

	const char *u8_1 = (const char *)m1;

	

	for (; len > 0; ++u8_0, ++u8_1, --len)

		if (*u8_0 != *u8_1)

			return (*u8_0 - *u8_1);

	return 0;

}



void *memset(void *m, int c, int len)

{

	char *p = (char *)m;

	

	for (; len > 0; len--)

		*p++ = (char)c;

	return m;

}



#endif