#include "string.h"
void* memset(void *mem
, int c
, unsigned size
) {
unsigned i;
for ( i = 0; i < size; i++ )
*((char *)mem+i) = (char) c;
return NULL;
}
void* memcpy(void *dst
, const void *src
, unsigned size
) {
unsigned i;
for ( i = 0; i < size; i++)
*(char *)(dst+i) = *(char *)(src+i);
return NULL;
}
int memcmp(const void* buf1
, const void* buf2
, int count
) {
int i;
for (i=0;i<count;i++)
{
if (*(unsigned char*)buf1<*(unsigned char*)buf2)
return -1;
if (*(unsigned char*)buf1>*(unsigned char*)buf2)
return 1;
}
return 0;
}
void strcat(char strDest
[], char strSource
[]) {
int i, j;
i = j = 0;
while (strDest[i] != '\0')
i++;
while ((strDest[i++] = strSource[j++]) != '\0')
;
}
int strcmp(const char* string1
, const char* string2
) {
while (1)
{
if (*string1<*string2)
return -1;
if (*string1>*string2)
return 1;
if (*string1=='\0')
return 0;
string1++;
string2++;
}
}
void strcpy(char strDest
[], const char strSource
[]) {
unsigned i;
i = 0;
while ((strDest[i] = strSource[i]) != '\0')
i++;
}
char* strncpy(char *strDest
, const char *strSource
, unsigned n
) {
unsigned i;
if (! n )
return strDest;
i = 0;
while ((strDest[i] = strSource[i]) != '\0')
if ( (n-1) == i )
break;
else
i++;
return strDest;
}
int strlen(const char* string
) {
int i;
i=0;
while (*string++) i++;
return i;
}
char* strchr(const char* string
, int c
) {
while (*string)
{
if (*string==c)
return (char*)string;
string++;
}
return (char*)0;
}
char* strrchr(const char* string
, int c
) {
char* last_found;
while (*string)
{
if (*string==c)
{
last_found = (char*)string;
}
string++;
}
return last_found;
}
void _itoa(int i, char *s)
{
int a, b, c, d;
a = (i - i%1000)/1000;
b = (i - i%100)/100 - a*10;
c = (i - i%10)/10 - a*100 - b*10;
d = i%10;
s[0] = a + '0';
s[1] = b + '0';
s[2] = c + '0';
s[3] = d + '0';
s[4] = 0;
}
/* reverse: ïåðåâîðà÷èâàåì ñòðîêó s íà ìåñòå */
void reverse(char s[])
{
int i, j;
char c;
for (i
= 0, j
= strlen(s
)-1; i
<j
; i
++, j
--) { c = s[i];
s[i] = s[j];
s[j] = c;
}
}
/* itoa: êîíâåðòèðóåì n â ñèìâîëû â s */
void itoa(int n
, char s
[]) {
int i, sign;
if ((sign = n) < 0)
n = -n;
i = 0;
do {
s[i++] = n % 10 + '0';
} while ((n /= 10) > 0);
if (sign < 0)
s[i++] = '-';
s[i] = '\0';
reverse(s);
}
int _atoi ( char *s )
{
int i, n;
n = 0;
for ( i = 0; s[i]!= '\0'; ++i)
if ((s[i]<'0') || (s[i]>'9'))
return 0;
else
n = 10 * n + s[i] - '0';
return n;
}