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#define _GNU_SOURCE 1
#include <string.h>
#ifdef _MSC_VER
_inline void *
#else
static __inline__ void *
#endif
my_inline_memchr(const void *pv, int ch, register size_t cb)
{
register const unsigned int uch = (unsigned)ch;
register const unsigned char *pb = (const unsigned char *)pv;
#if 0 /* 8-byte loop unroll */
while (cb >= 8)
{
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
if (pb[4] == uch)
return (unsigned char *)pb + 4;
if (pb[5] == uch)
return (unsigned char *)pb + 5;
if (pb[6] == uch)
return (unsigned char *)pb + 6;
if (pb[7] == uch)
return (unsigned char *)pb + 7;
cb -= 8;
pb += 8;
}
switch (cb & 7)
{
case 0:
break;
case 1:
if (*pb == uch)
return (unsigned char *)pb;
break;
case 2:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
break;
case 3:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
break;
case 4:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
break;
case 5:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
if (pb[4] == uch)
return (unsigned char *)pb + 4;
break;
case 6:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
if (pb[4] == uch)
return (unsigned char *)pb + 4;
if (pb[5] == uch)
return (unsigned char *)pb + 5;
break;
case 7:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
if (pb[4] == uch)
return (unsigned char *)pb + 4;
if (pb[5] == uch)
return (unsigned char *)pb + 5;
if (pb[6] == uch)
return (unsigned char *)pb + 6;
break;
}
#elif 1 /* 4 byte loop unroll */
while (cb >= 4)
{
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
if (pb[3] == uch)
return (unsigned char *)pb + 3;
cb -= 4;
pb += 4;
}
switch (cb & 3)
{
case 0:
break;
case 1:
if (*pb == uch)
return (unsigned char *)pb;
break;
case 2:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
break;
case 3:
if (*pb == uch)
return (unsigned char *)pb;
if (pb[1] == uch)
return (unsigned char *)pb + 1;
if (pb[2] == uch)
return (unsigned char *)pb + 2;
break;
}
#else /* the basic loop */
while (cb > 0)
{
if (*pb == uch)
return (void *)pb;
cb--;
pb++;
}
#endif
return 0;
}
#define memchr my_inline_memchr
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