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/* stringlib: find/index implementation */
#ifndef STRINGLIB_FIND_H
#define STRINGLIB_FIND_H
#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;
if (sub_len == 0) {
if (str_len < 0)
return -1;
return offset;
}
pos = fastsearch(str, str_len, sub, sub_len, 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)
{
/* XXX - create reversefastsearch helper! */
if (sub_len == 0) {
if (str_len < 0)
return -1;
return str_len + offset;
} else {
Py_ssize_t j, pos = -1;
for (j = str_len - sub_len; j >= 0; --j)
if (STRINGLIB_CMP(str+j, sub, sub_len) == 0) {
pos = j + offset;
break;
}
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)
{
if (start < 0)
start += str_len;
if (start < 0)
start = 0;
if (end > str_len)
end = str_len;
if (end < 0)
end += str_len;
if (end < 0)
end = 0;
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)
{
if (start < 0)
start += str_len;
if (start < 0)
start = 0;
if (end > str_len)
end = str_len;
if (end < 0)
end += str_len;
if (end < 0)
end = 0;
return stringlib_rfind(str + start, end - start, sub, sub_len, start);
}
#ifdef STRINGLIB_STR
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_STR */
#endif /* STRINGLIB_FIND_H */
/*
Local variables:
c-basic-offset: 4
indent-tabs-mode: nil
End:
*/
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