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72 lines (56 loc) · 1.85 KB
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/* stringlib: find/index implementation */
#ifndef STRINGLIB_FASTSEARCH_H
#error must include "stringlib/fastsearch.h" before including this module
#endif
Py_LOCAL_INLINE(Py_ssize_t)
STRINGLIB(find)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
Py_ssize_t offset)
{
Py_ssize_t pos;
assert(str_len >= 0);
if (sub_len == 0)
return offset;
pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_SEARCH);
if (pos >= 0)
pos += offset;
return pos;
}
Py_LOCAL_INLINE(Py_ssize_t)
STRINGLIB(rfind)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
Py_ssize_t offset)
{
Py_ssize_t pos;
assert(str_len >= 0);
if (sub_len == 0)
return str_len + offset;
pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_RSEARCH);
if (pos >= 0)
pos += offset;
return pos;
}
Py_LOCAL_INLINE(Py_ssize_t)
STRINGLIB(find_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
Py_ssize_t start, Py_ssize_t end)
{
return STRINGLIB(find)(str + start, end - start, sub, sub_len, start);
}
Py_LOCAL_INLINE(Py_ssize_t)
STRINGLIB(rfind_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
Py_ssize_t start, Py_ssize_t end)
{
return STRINGLIB(rfind)(str + start, end - start, sub, sub_len, start);
}
#ifdef STRINGLIB_WANT_CONTAINS_OBJ
Py_LOCAL_INLINE(int)
STRINGLIB(contains_obj)(PyObject* str, PyObject* sub)
{
return STRINGLIB(find)(
STRINGLIB_STR(str), STRINGLIB_LEN(str),
STRINGLIB_STR(sub), STRINGLIB_LEN(sub), 0
) != -1;
}
#endif /* STRINGLIB_WANT_CONTAINS_OBJ */