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// -*- mode: c++ -*-
// Copyright (c) 2007-2008 PediaPress GmbH
// See README.txt for additional licensing information.
#include <Python.h>
#include <iostream>
#include <assert.h>
#include <vector>
using namespace std;
#define RET(x) {found(x); return x;}
struct Token
{
int type;
int start;
int len;
};
class MacroScanner
{
public:
MacroScanner(Py_UNICODE *_start, Py_UNICODE *_end) {
source = start = _start;
end = _end;
cursor = start;
}
int found(int val) {
if (val==5 && tokens.size()) {
Token &previous_token (tokens[tokens.size()-1]);
if (previous_token.type==val) {
previous_token.len += cursor-start;
return tokens.size()-1;
}
}
Token t;
t.type = val;
t.start = (start-source);
t.len = cursor-start;
tokens.push_back(t);
return tokens.size()-1;
}
inline int scan();
Py_UNICODE *source;
Py_UNICODE *start;
Py_UNICODE *cursor;
Py_UNICODE *end;
vector<Token> tokens;
};
int MacroScanner::scan()
{
std:
start=cursor;
Py_UNICODE *marker=cursor;
Py_UNICODE *save_cursor = cursor;
#define YYCTYPE Py_UNICODE
#define YYCURSOR cursor
#define YYMARKER marker
#define YYLIMIT (end)
// #define YYFILL(n) return 0;
/*!re2c
re2c:yyfill:enable = 0 ;
*/
/*!re2c
"{"{2,} {RET(1);}
"}"{2,} {RET(2);}
"[[" | "]]" {RET(3);}
"|" {RET(6);}
'<noinclude>' {goto noinclude;}
'<nowiki>' {goto nowiki;}
'<imagemap' [^<>\000]* '>' {goto imagemap;}
'<math' [^<>\000]* '>' {goto math;}
'<gallery' [^<>\000]* '>' {goto gallery;}
"<!--[^\000<>]*-->" {RET(5);}
"\000" {RET(0);}
[^\000] {RET(5);}
*/
noinclude:
/*!re2c
'</noinclude>' {goto std;}
[^\000] {goto noinclude;}
"\000" {cursor=start+11; RET(5);}
*/
nowiki:
/*!re2c
'</nowiki>' {RET(5);}
[^\000] {goto nowiki;}
"\000" {RET(0);}
*/
math:
/*!re2c
'</math>' {RET(5);}
[^\000] {goto math;}
"\000" {RET(0);}
*/
gallery:
/*!re2c
'</gallery>' {RET(5);}
[^\000] {goto gallery;}
"\000" {RET(0);}
*/
imagemap:
/*!re2c
'</imagemap>' {RET(5);}
[^\000] {goto imagemap;}
"\000" {RET(0);}
*/
pre:
/*!re2c
'</pre>' {RET(5);}
[^\000] {goto pre;}
"\000" {RET(0);}
*/
}
PyObject *py_scan(PyObject *self, PyObject *args)
{
PyObject *arg1;
if (!PyArg_ParseTuple(args, "O:_expander.scan", &arg1)) {
return 0;
}
PyUnicodeObject *unistr = (PyUnicodeObject*)PyUnicode_FromObject(arg1);
if (unistr == NULL) {
PyErr_SetString(PyExc_TypeError,
"parameter cannot be converted to unicode in _expander.scan");
return 0;
}
Py_UNICODE *start = unistr->str;
Py_UNICODE *end = start+unistr->length;
MacroScanner scanner (start, end);
Py_BEGIN_ALLOW_THREADS
while (scanner.scan()) {
}
Py_END_ALLOW_THREADS
Py_XDECREF(unistr);
// return PyList_New(0); // uncomment to see timings for scanning
int size = scanner.tokens.size();
PyObject *result = PyList_New(size);
if (!result) {
return 0;
}
for (int i=0; i<size; i++) {
Token t = scanner.tokens[i];
PyList_SET_ITEM(result, i, Py_BuildValue("iii", t.type, t.start, t.len));
}
return result;
}
static PyMethodDef module_functions[] = {
{"scan", (PyCFunction)py_scan, METH_VARARGS, "scan(text)"},
{0, 0},
};
extern "C" {
DL_EXPORT(void) init_expander();
}
DL_EXPORT(void) init_expander()
{
/*PyObject *m =*/ Py_InitModule("_expander", module_functions);
}
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