mirror of https://github.com/python/cpython
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* stringlib: find/index implementation */
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#ifndef STRINGLIB_FASTSEARCH_H
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#error must include "stringlib/fastsearch.h" before including this module
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#endif
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(find)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t offset)
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{
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Py_ssize_t pos;
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assert(str_len >= 0);
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if (sub_len == 0)
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return offset;
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pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_SEARCH);
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if (pos >= 0)
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pos += offset;
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return pos;
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(rfind)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t offset)
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{
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Py_ssize_t pos;
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assert(str_len >= 0);
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if (sub_len == 0)
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return str_len + offset;
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pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_RSEARCH);
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if (pos >= 0)
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pos += offset;
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return pos;
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(find_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t start, Py_ssize_t end)
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{
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return STRINGLIB(find)(str + start, end - start, sub, sub_len, start);
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(rfind_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t start, Py_ssize_t end)
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{
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return STRINGLIB(rfind)(str + start, end - start, sub, sub_len, start);
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}
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#ifdef STRINGLIB_WANT_CONTAINS_OBJ
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Py_LOCAL_INLINE(int)
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STRINGLIB(contains_obj)(PyObject* str, PyObject* sub)
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{
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return STRINGLIB(find)(
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STRINGLIB_STR(str), STRINGLIB_LEN(str),
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STRINGLIB_STR(sub), STRINGLIB_LEN(sub), 0
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) != -1;
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}
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#endif /* STRINGLIB_WANT_CONTAINS_OBJ */
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