1 /* stringlib: count implementation */
2
3 #ifndef STRINGLIB_FASTSEARCH_H
4 #error must include "stringlib/fastsearch.h" before including this module
5 #endif
6
7 // gh-97982: Implementing asciilib_count() is not worth it, FASTSEARCH() does
8 // not specialize the code for ASCII strings. Use ucs1lib_count() for ASCII and
9 // UCS1 strings: it's the same than asciilib_count().
10 #if !STRINGLIB_IS_UNICODE || STRINGLIB_MAX_CHAR > 0x7Fu
11
12 Py_LOCAL_INLINE(Py_ssize_t)
STRINGLIB(count)13 STRINGLIB(count)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
14 const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
15 Py_ssize_t maxcount)
16 {
17 Py_ssize_t count;
18
19 if (str_len < 0)
20 return 0; /* start > len(str) */
21 if (sub_len == 0)
22 return (str_len < maxcount) ? str_len + 1 : maxcount;
23
24 count = FASTSEARCH(str, str_len, sub, sub_len, maxcount, FAST_COUNT);
25
26 if (count < 0)
27 return 0; /* no match */
28
29 return count;
30 }
31
32 #endif
33