blob: 036c563485272f15ac1e79df7fc14832edc6e896 [file] [log] [blame]
/*
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hf/std.h"
void *memset(void *s, int c, size_t n)
{
char *p = (char *)s;
while (n--) {
*p++ = c;
}
return s;
}
/*
* Calculates the length of the provided null-terminated string.
*/
size_t strlen(const char *str)
{
const char *p = str;
while (*p) {
p++;
}
return p - str;
}
void *memcpy(void *dst, const void *src, size_t n)
{
char *x = dst;
const char *y = src;
while (n--) {
*x = *y;
x++;
y++;
}
return dst;
}
void *memmove(void *dst, const void *src, size_t n)
{
char *x;
const char *y;
if (dst < src) {
return memcpy(dst, src, n);
}
x = (char *)dst + n - 1;
y = (const char *)src + n - 1;
while (n--) {
*x = *y;
x--;
y--;
}
return dst;
}
int memcmp(const void *a, const void *b, size_t n)
{
const char *x = a;
const char *y = b;
while (n--) {
if (*x != *y) {
return *x - *y;
}
x++;
y++;
}
return 0;
}
int strcmp(const char *a, const char *b)
{
const char *x = a;
const char *y = b;
while (*x != 0 && *y != 0) {
if (*x != *y) {
return *x - *y;
}
x++;
y++;
}
return *x - *y;
}