Subversion Repositories hf-risc

#include <string.h>

#include <stdint.h>

char* strcpy(char* dst, const char* src)

{

  char* dst0 = dst;

#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__)

  int misaligned = ((uintptr_t)dst | (uintptr_t)src) & (sizeof(long)-1);

  if (__builtin_expect(!misaligned, 1))

  {

    long* ldst = (long*)dst;

    const long* lsrc = (const long*)src;

    while (!__libc_detect_null(*lsrc))

      *ldst++ = *lsrc++;

    dst = (char*)ldst;

    src = (const char*)lsrc;

    char c0 = src[0];

    char c1 = src[1];

    char c2 = src[2];

    if (!(*dst++ = c0)) return dst0;

    if (!(*dst++ = c1)) return dst0;

    char c3 = src[3];

    if (!(*dst++ = c2)) return dst0;

    if (sizeof(long) == 4) goto out;

    char c4 = src[4];

    if (!(*dst++ = c3)) return dst0;

    char c5 = src[5];

    if (!(*dst++ = c4)) return dst0;

    char c6 = src[6];

    if (!(*dst++ = c5)) return dst0;

    if (!(*dst++ = c6)) return dst0;

out:

    *dst++ = 0;

    return dst0;

  }

#endif /* not PREFER_SIZE_OVER_SPEED */

  char ch;

  do

  {

    ch = *src;

    src++;

    dst++;

    *(dst-1) = ch;

  } while(ch);

  return dst0;

}