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Last change
on this file since 1813 was 1813, checked in by bird, 16 years ago |
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kmk: inline memchr everywhere but on linux.
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Property svn:eol-style
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native
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Property svn:keywords
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Id
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File size:
1.3 KB
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| 1 | #include <string.h>
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| 2 | static __inline__ void *
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| 3 | my_inline_memchr(const void *pv, int ch, register size_t cb)
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| 4 | {
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| 5 | register const unsigned int uch = (unsigned)ch;
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| 6 | register const unsigned char *pb = (const unsigned char *)pv;
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| 7 | #if 1
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| 8 | while (cb >= 4)
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| 9 | {
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| 10 | if (*pb == uch)
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| 11 | return (unsigned char *)pb;
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| 12 | if (pb[1] == uch)
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| 13 | return (unsigned char *)pb + 1;
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| 14 | if (pb[2] == uch)
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| 15 | return (unsigned char *)pb + 2;
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| 16 | if (pb[3] == uch)
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| 17 | return (unsigned char *)pb + 3;
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| 18 | cb -= 4;
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| 19 | pb += 4;
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| 20 | }
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| 21 | switch (cb & 3)
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| 22 | {
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| 23 | case 0:
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| 24 | break;
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| 25 | case 1:
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| 26 | if (*pb == uch)
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| 27 | return (unsigned char *)pb;
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| 28 | break;
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| 29 | case 2:
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| 30 | if (*pb == uch)
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| 31 | return (unsigned char *)pb;
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| 32 | if (pb[1] == uch)
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| 33 | return (unsigned char *)pb + 1;
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| 34 | break;
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| 35 | case 3:
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| 36 | if (*pb == uch)
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| 37 | return (unsigned char *)pb;
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| 38 | if (pb[1] == uch)
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| 39 | return (unsigned char *)pb + 1;
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| 40 | if (pb[2] == uch)
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| 41 | return (unsigned char *)pb + 2;
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| 42 | break;
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| 43 | }
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| 44 |
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| 45 | #else
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| 46 | while (cb > 0)
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| 47 | {
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| 48 | if (*pb == uch)
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| 49 | return (void *)pb;
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| 50 | cb--;
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| 51 | pb++;
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| 52 | }
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| 53 | #endif
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| 54 | return 0;
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| 55 | }
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| 56 |
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| 57 | #define memchr my_inline_memchr
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| 58 |
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