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v0.5.1
v0.5.1
https://github.com/python/cpython
Revision f6b5cad3c37f5f8d2db5ded60c85b2beab360181 authored by Benjamin Peterson on 02 August 2015, 19:15:30 UTC, committed by Benjamin Peterson on 02 August 2015, 19:15:30 UTC
Patch by Jeffrey Armstrong.
1 parent 6b3f29c
Tip revision: f6b5cad3c37f5f8d2db5ded60c85b2beab360181 authored by Benjamin Peterson on 02 August 2015, 19:15:30 UTC
include fcntl.h on all *nix platforms (closes #24217)
include fcntl.h on all *nix platforms (closes #24217)
Tip revision: f6b5cad
replace.h
/* stringlib: replace implementation */
#ifndef STRINGLIB_FASTSEARCH_H
#error must include "stringlib/fastsearch.h" before including this module
#endif
Py_LOCAL_INLINE(void)
STRINGLIB(replace_1char_inplace)(STRINGLIB_CHAR* s, STRINGLIB_CHAR* end,
Py_UCS4 u1, Py_UCS4 u2, Py_ssize_t maxcount)
{
*s = u2;
while (--maxcount && ++s != end) {
/* Find the next character to be replaced.
If it occurs often, it is faster to scan for it using an inline
loop. If it occurs seldom, it is faster to scan for it using a
function call; the overhead of the function call is amortized
across the many characters that call covers. We start with an
inline loop and use a heuristic to determine whether to fall back
to a function call. */
if (*s != u1) {
int attempts = 10;
/* search u1 in a dummy loop */
while (1) {
if (++s == end)
return;
if (*s == u1)
break;
if (!--attempts) {
/* if u1 was not found for attempts iterations,
use FASTSEARCH() or memchr() */
#if STRINGLIB_SIZEOF_CHAR == 1
s++;
s = memchr(s, u1, end - s);
if (s == NULL)
return;
#else
Py_ssize_t i;
STRINGLIB_CHAR ch1 = (STRINGLIB_CHAR) u1;
s++;
i = FASTSEARCH(s, end - s, &ch1, 1, 0, FAST_SEARCH);
if (i < 0)
return;
s += i;
#endif
/* restart the dummy loop */
break;
}
}
}
*s = u2;
}
}
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