/* mem.c — memcpy/memset shims for freestanding wasm32 */

#include "mem.h"

void *memcpy(void *dst, const void *src, size_t n) {
  unsigned char *d = (unsigned char *)dst;
  const unsigned char *s = (const unsigned char *)src;
  while (n--)
    *d++ = *s++;
  return dst;
}

void *memmove(void *dst, const void *src, size_t n) {
  unsigned char *d = (unsigned char *)dst;
  const unsigned char *s = (const unsigned char *)src;
  if (d == s || n == 0)
    return dst;
  if (d < s) {
    while (n--)
      *d++ = *s++;
  } else {
    d += n;
    s += n;
    while (n--)
      *--d = *--s;
  }
  return dst;
}

void *memset(void *dst, int c, size_t n) {
  unsigned char *d = (unsigned char *)dst;
  while (n--)
    *d++ = (unsigned char)c;
  return dst;
}

size_t strlen(const char *s) {
  size_t n = 0;
  while (s[n])
    n++;
  return n;
}

int align8(int n) { return (n + 7) & ~7; }