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Simplify heuristic for when to use memchr

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This commit is contained in:
Antoine Pitrou 2011-10-13 17:58:11 +02:00
parent 72d6a13413
commit dda339e6d2
1 changed files with 1 additions and 11 deletions
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12
Objects/stringlib/fastsearch.h
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@ -113,20 +113,10 @@ FASTSEARCH(const STRINGLIB_CHAR* s, Py_ssize_t n,
/* use memchr if we can choose a needle without two many likely
false positives */
unsigned char needle;
int use_needle = 1;
needle = p[0] & 0xff;
#if STRINGLIB_SIZEOF_CHAR > 1
if (needle == 0) {
needle = (p[0] >> 8) & 0xff;
#if STRINGLIB_SIZEOF_CHAR > 2
if (needle == 0)
needle = (p[0] >> 16) & 0xff;
if (needle != 0)
#endif
if (needle >= 32 || needle == 0)
use_needle = 0;
}
#endif
if (use_needle)
return STRINGLIB(fastsearch_memchr_1char)
(s, n, p[0], needle, maxcount, mode);
}