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rewrote the pattern.split method in C 

also restored SRE Unicode support for 1.6/2.0/2.1
This commit is contained in:
Fredrik Lundh 2001-10-20 17:48:46 +00:00
parent 9dbc0bcf9d
commit 971e78b55b
1 changed files with 136 additions and 12 deletions
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148
Modules/_sre.c
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@ -33,6 +33,7 @@
* 2001-07-01 fl added BIGCHARSET support (from Martin von Loewis)
* 2001-09-18 fl added _getliteral helper
* 2001-10-18 fl fixed group reset issue (from Matthew Mueller)
* 2001-10-20 fl added split primitive; reenable unicode for 1.6/2.0/2.1
*
* Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
*
@ -65,14 +66,19 @@ static char copyright[] =
/* defining this one enables tracing */
#undef VERBOSE
#if PY_VERSION_HEX >= 0x01060000 && defined(Py_USING_UNICODE)
#if PY_VERSION_HEX >= 0x01060000
#if PY_VERSION_HEX < 0x02020000 || defined(Py_USING_UNICODE)
/* defining this enables unicode support (default under 1.6a1 and later) */
#define HAVE_UNICODE
#endif
#endif
/* -------------------------------------------------------------------- */
/* optional features */
/* test: define to use sre._split helper instead of C code */
#undef USE_PYTHON_SPLIT
/* prevent run-away recursion (bad patterns on long strings) */
#if !defined(USE_STACKCHECK)
@ -1488,14 +1494,20 @@ state_fini(SRE_STATE* state)
}
LOCAL(PyObject*)
state_getslice(SRE_STATE* state, int index, PyObject* string)
state_getslice(SRE_STATE* state, int index, PyObject* string, int empty)
{
int i, j;
index = (index - 1) * 2;
if (string == Py_None || !state->mark[index] || !state->mark[index+1]) {
i = j = 0;
if (empty)
/* want empty string */
i = j = 0;
else {
Py_INCREF(Py_None);
return Py_None;
}
} else {
i = ((char*)state->mark[index] - (char*)state->beginning) /
state->charsize;
@ -1782,6 +1794,7 @@ pattern_subn(PatternObject* self, PyObject* args, PyObject* kw)
);
}
#if defined(USE_PYTHON_SPLIT)
static PyObject*
pattern_split(PatternObject* self, PyObject* args, PyObject* kw)
{
@ -1798,6 +1811,7 @@ pattern_split(PatternObject* self, PyObject* args, PyObject* kw)
Py_BuildValue("OOO", self, string, maxsplit)
);
}
#endif
static PyObject*
pattern_findall(PatternObject* self, PyObject* args, PyObject* kw)
@ -1805,7 +1819,7 @@ pattern_findall(PatternObject* self, PyObject* args, PyObject* kw)
SRE_STATE state;
PyObject* list;
int status;
int i;
int i, b, e;
PyObject* string;
int start = 0;
@ -1842,17 +1856,16 @@ pattern_findall(PatternObject* self, PyObject* args, PyObject* kw)
/* don't bother to build a match object */
switch (self->groups) {
case 0:
item = PySequence_GetSlice(
string,
((char*) state.start - (char*) state.beginning) /
state.charsize,
((char*) state.ptr - (char*) state.beginning) /
state.charsize);
b = ((char*) state.start - (char*) state.beginning) /
state.charsize;
e = ((char*) state.ptr - (char*) state.beginning) /
state.charsize;
item = PySequence_GetSlice(string, b, e);
if (!item)
goto error;
break;
case 1:
item = state_getslice(&state, 1, string);
item = state_getslice(&state, 1, string, 1);
if (!item)
goto error;
break;
@ -1861,7 +1874,7 @@ pattern_findall(PatternObject* self, PyObject* args, PyObject* kw)
if (!item)
goto error;
for (i = 0; i < self->groups; i++) {
PyObject* o = state_getslice(&state, i+1, string);
PyObject* o = state_getslice(&state, i+1, string, 1);
if (!o) {
Py_DECREF(item);
goto error;
@ -1903,6 +1916,117 @@ error:
}
#if !defined(USE_PYTHON_SPLIT)
static PyObject*
pattern_split(PatternObject* self, PyObject* args, PyObject* kw)
{
SRE_STATE state;
PyObject* list;
PyObject* item;
int status;
int n;
int i, b, e;
int g;
PyObject* string;
int maxsplit = 0;
static char* kwlist[] = { "source", "maxsplit", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kw, "O|i:split", kwlist,
&string, &maxsplit))
return NULL;
string = state_init(&state, self, string, 0, INT_MAX);
if (!string)
return NULL;
list = PyList_New(0);
i = n = 0;
while (maxsplit == 0 || n < maxsplit) {
state_reset(&state);
state.ptr = state.start;
if (state.charsize == 1) {
status = sre_search(&state, PatternObject_GetCode(self));
} else {
#if defined(HAVE_UNICODE)
status = sre_usearch(&state, PatternObject_GetCode(self));
#endif
}
if (status > 0) {
if (state.start == state.ptr) {
if (i >= state.endpos)
break;
/* skip one character */
state.start = (void*) ((char*) state.ptr + state.charsize);
continue;
}
b = ((char*) state.start - (char*) state.beginning) /
state.charsize;
e = ((char*) state.ptr - (char*) state.beginning) /
state.charsize;
/* get segment before this match */
item = PySequence_GetSlice(string, i, b);
if (!item)
goto error;
status = PyList_Append(list, item);
Py_DECREF(item);
if (status < 0)
goto error;
for (g = 0; g < self->groups; g++) {
item = state_getslice(&state, g+1, string, 0);
if (!item)
goto error;
status = PyList_Append(list, item);
Py_DECREF(item);
if (status < 0)
goto error;
}
i = e;
n = n + 1;
state.start = state.ptr;
} else {
if (status == 0)
break;
pattern_error(status);
goto error;
}
}
/* get segment following last match */
item = PySequence_GetSlice(string, i, state.endpos);
if (!item)
goto error;
status = PyList_Append(list, item);
Py_DECREF(item);
if (status < 0)
goto error;
state_fini(&state);
return list;
error:
Py_DECREF(list);
state_fini(&state);
return NULL;
}
#endif
static PyObject*
pattern_copy(PatternObject* self, PyObject* args)
{