113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/* 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)
|
|
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)
|
|
{
|
|
Py_ssize_t pos;
|
|
|
|
/* XXX - create reversefastsearch helper! */
|
|
if (sub_len == 0)
|
|
pos = 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:
|
|
*/
|