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cpython/Objects/stringlib/count.h
Amaury Forgeot d'Arc f2e9368021 Merged revisions 66631 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r66631 | amaury.forgeotdarc | 2008-09-27 00:34:08 +0200 (sam., 27 sept. 2008) | 7 lines

  #3967: Correct a crash in count() and find() methods of string-like objects.
  For example:
     "".count("xxxx", sys.maxint, 0)

  Reviewed by Benjamin Peterson.
  Will port to 2.5 and 3.0.
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2008-09-26 22:48:41 +00:00

37 lines
713 B
C

/* stringlib: count implementation */
#ifndef STRINGLIB_COUNT_H
#define STRINGLIB_COUNT_H
#ifndef STRINGLIB_FASTSEARCH_H
#error must include "stringlib/fastsearch.h" before including this module
#endif
Py_LOCAL_INLINE(Py_ssize_t)
stringlib_count(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len)
{
Py_ssize_t count;
if (str_len < 0)
return 0; /* start > len(str) */
if (sub_len == 0)
return str_len + 1;
count = fastsearch(str, str_len, sub, sub_len, FAST_COUNT);
if (count < 0)
count = 0; /* no match */
return count;
}
#endif
/*
Local variables:
c-basic-offset: 4
indent-tabs-mode: nil
End:
*/