kolibrios/programs/games/foxhunt/system/string.c
Albom 49560506b1 foxhunt game version 0.2
git-svn-id: svn://kolibrios.org@4556 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-02-04 18:35:58 +00:00

203 lines
2.7 KiB
C
Raw Blame History

#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: <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> s <20><> <20><><EFBFBD><EFBFBD><EFBFBD> */
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: <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> n <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> 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;
}