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#include <stddef.h>
#include <kernel/io/io.h>
size_t strlen(const char *str) {
size_t len = 0;
while (str[len])
len++;
return len;
}
size_t strcmp(const char *s1, const char *s2) {
size_t s_a = strlen(s1);
for (size_t i = 0; i < s_a; i++)
if (s1[i] != s2[i])
return 1;
return 0;
}
void strcat(char *dest, const char *src) {
size_t s_dest = strlen(dest);
size_t s_orig = strlen(src);
for (size_t i = 0; i < s_orig; i++) dest[s_dest + i] = src[i];
dest[s_dest + s_orig] = 0;
}
void strcpy(char *dest, const char *src) {
size_t s_orig = strlen(src);
for (size_t i = 0; i < s_orig; i++) dest[i] = src[i];
dest[s_orig] = 0;
}
char *itoa(int i, char b[]) {
char const digit[] = "0123456789";
char *p = b;
if (i < 0) {
*p++ = '-';
i *= -1;
}
int shifter = i;
do {
++p;
shifter = shifter / 10;
} while (shifter);
*p = '\0';
do {
*--p = digit[i % 10];
i = i / 10;
} while (i);
return b;
}
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