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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* macro_parser.cc
*
* Mon Sep 24 10:49:55 CEST 2007
* Copyright 2007 Bent Bisballe Nyeng, Lars Bisballe Jensen and Peter Skaarup
* deva@aasimon.org, elsenator@gmail.com and piparum@piparum.dk
****************************************************************************/
/*
* This file is part of Pracro.
*
* Pracro is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pracro is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pracro; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "macro_parser.h"
// For XML
#include <config.h>
// For open, read and close
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <expat.h>
#include <string>
#include <map>
class MacroParser {
public:
Macro *macro;
std::vector< Widget* > stack;
bool done;
};
static void start_hndl(void *p, const char *el, const char **attr)
{
MacroParser *parser = (MacroParser*)XML_GetUserData(p);
// printf("Start tag [%s]\n", el);
// Convert to comfy C++ values...
std::string name = el;
std::map< std::string, std::string > attributes;
while(*attr) {
std::string at_name = *attr;
attr++;
std::string at_value = *attr;
attr++;
attributes.insert(make_pair(at_name, at_value));
}
// Do something reasonable with them...
if(name == "include") {
Macro inc;
parse_macro(attributes["name"], inc);
WidgetList::iterator w = inc.widgets.front().widgets.begin();
while(w != inc.widgets.front().widgets.end()) {
parser->stack.back()->widgets.push_back(*w);
w++;
}
return; // Don't do further parsing of this tag.
}
Widget widget;
widget.type = name;
Widget *wp;
if(parser->stack.size() > 0) {// We only pushback the child if there is a parent.
parser->stack.back()->widgets.push_back(widget);
wp = &parser->stack.back()->widgets.back();
} else {
parser->macro->widgets.push_back(widget);
wp = &parser->macro->widgets.back();
}
parser->stack.push_back(wp);
std::map< std::string, std::string >::iterator i = attributes.begin();
while(i != attributes.end()) {
WidgetProperty prop;
prop.name = i->first;
prop.value = i->second;
wp->properties.push_back(prop);
i++;
}
}
static void end_hndl(void *p, const char *el)
{
MacroParser *parser = (MacroParser*)XML_GetUserData(p);
// printf("End tag [%s]\n", el);
if(std::string("include") != el) parser->stack.pop_back();
if(!strcmp(el, "macro")) parser->done = true;
}
void parse_macro(std::string name, Macro ¯o)
{
XML_Parser p = XML_ParserCreate(NULL);
if (! p) {
fprintf(stderr, "Couldn't allocate memory for parser\n");
// throw Exception(...);
return;
}
MacroParser parser;
parser.macro = ¯o;
parser.done = false;
XML_SetUserData(p, &parser);
XML_UseParserAsHandlerArg(p);
XML_SetElementHandler(p, start_hndl, end_hndl);
std::string macrofile = std::string(XML) + "/" + name + ".xml";
int fd = open(macrofile.c_str(), O_RDONLY);
if(fd == -1) {
printf("Cannot open file \"%s\"...", macrofile.c_str());
printf("failed!\n");
return;
}
while(!parser.done) {
char buf[32];
int len;
memset(buf, 0, sizeof(buf));
len = read(fd, buf, sizeof(buf) - 1);
parser.done = len == 0;
if (! XML_Parse(p, buf, len, parser.done)) {
fprintf(stderr, "Parse error at line %d:\n%s\n",
XML_GetCurrentLineNumber(p),
XML_ErrorString(XML_GetErrorCode(p)));
// throw Exception(...);
return;
}
}
// printf("%d requests\n", transaction.requests.size());
}
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