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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2026 Richard QIn
*/
#include "lib/string.h"
void *memset(void *dst, int c, uint n)
{
char *cdst = (char *)dst;
for (uint i = 0; i < n; i++)
cdst[i] = c;
return dst;
}
int memcmp(const void *v1, const void *v2, uint n)
{
const uchar *s1 = (const uchar *)v1;
const uchar *s2 = (const uchar *)v2;
while (n-- > 0)
{
if (*s1 != *s2)
return *s1 - *s2;
s1++, s2++;
}
return 0;
}
void *memmove(void *dst, const void *src, uint n)
{
const char *s = (const char *)src;
char *d = (char *)dst;
if (s < d && s + n > d)
{
s += n;
d += n;
while (n-- > 0)
*--d = *--s;
}
else
{
while (n-- > 0)
*d++ = *s++;
}
return dst;
}
void *memcpy(void *dst, const void *src, uint n)
{
return memmove(dst, src, n);
}
void strcpy(char *dst, const char *src)
{
while (*src)
*dst++ = *src++;
*dst = 0;
}
int strlen(const char *s)
{
int n = 0;
while (s[n])
n++;
return n;
}
int strcmp(const char *s1, const char *s2)
{
while (*s1 && (*s1 == *s2))
{
s1++;
s2++;
}
return *(const unsigned char *)s1 - *(const unsigned char *)s2;
}
int strcasecmp(const char *s1, const char *s2)
{
while (*s1)
{
if(*s1 == *s2 || *s1 + 32 == *s2 || *s1 == *s2 + 32){
s1++;
s2++;
}
else break;
}
return *(const unsigned char *)s1 - *(const unsigned char *)s2;
}
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