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/**
* Navit, a modular navigation system.
* Copyright (C) 2005-2008 Navit Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "gpx2navit_txt.h"
void charHandle(void *userdata, const XML_Char * data, int length);
void startElement(void *userdata, const char *element, const char **attr);
void endElement(void *userdata, const char *element);
void parseMain(g2sprop * prop);
/**
* a handler to parse charctor data on expat
*/
void charHandle(void *userdata, const XML_Char * data, int length)
{
static int bufsize = DATABUFSIZE;
static int string_length = 0;
int new_length;
static int begin_copy = 0;
int i;
parsedata *pdata = (parsedata *) userdata;
if (pdata->bufptr == NULL) {
//start of buffer -->pdata->bufptr set to 0 at endelement
string_length = 0;
begin_copy = 0; //begin to copy after first space
pdata->bufptr= pdata->databuf;
}
new_length = string_length + length + 1; //additonal 0
if (bufsize < new_length) {
pdata->databuf =
realloc(pdata->databuf, new_length);
bufsize = new_length;
//because of realloc the pointer may have changed
pdata->bufptr = pdata->databuf + string_length;
}
// because expat calls this routine several times on special chars
// we need to do following
// --concat strings until reset (bufptr set to NULL)
// --filter out blank chars at begin of string
for (i=0; i<length;i++) {
if (begin_copy || !isspace(data[i])) {
*pdata->bufptr = data[i];
pdata->bufptr++;
string_length ++;
begin_copy = 1;
if (DEBUG) fprintf(stderr,"%c",data[i]);
}
}
*pdata->bufptr = '\0';
}
/**
* a handler when a element starts
*/
void startElement(void *userdata, const char *element, const char **attr)
{
parsedata *pdata = (parsedata *) userdata;
pdata->parent = pdata->current;
pdata->current = malloc(sizeof(parent));
pdata->current->name = malloc(sizeof(char) * (strlen(element) + 1));
strcpy(pdata->current->name, element);
pdata->current->parentptr = pdata->parent;
startElementControl(pdata, element, attr);
if (pdata->prop->verbose) {
int i;
for (i = 0; i < pdata->depth; i++)
printf(" ");
printf("<%s>: ", element);
for (i = 0; attr[i]; i += 2) {
printf(" %s='%s'", attr[i], attr[i + 1]);
}
printf("\n");
}
pdata->depth++;
}
/**
* a handler when a element ends
*/
void endElement(void *userdata, const char *element)
{
parsedata *pdata = (parsedata *) userdata;
endElementControl(pdata, element);
pdata->depth--;
if (pdata->prop->verbose) {
int i;
for (i = 0; i < pdata->depth; i++)
printf(" ");
printf("</%s>:%s\n ", element,pdata->parent->name);
}
free(pdata->current->name);
free(pdata->current);
pdata->current = pdata->parent;
pdata->parent = pdata->parent->parentptr;
}
void parseMain(g2sprop * prop)
{
FILE *fp;
char buff[BUFFSIZE];
XML_Parser parser;
parsedata *pdata;
fp = fopen(prop->sourcefile, "r");
if (fp == NULL) {
fprintf(stderr, "Cannot open gpx file: %s\n", prop->sourcefile);
exit(ERR_CANNOTOPEN);
}
parser = XML_ParserCreate(NULL);
if (!parser) {
fprintf(stderr, "Couldn't allocate memory for parser\n");
exit(ERR_OUTOFMEMORY);
}
pdata = createParsedata(parser, prop);
char *output_wpt =
(char *) malloc(sizeof(char) * (strlen(pdata->prop->output) + 9));
strcpy(output_wpt, pdata->prop->output);
strcat(output_wpt, "_nav.txt");
pdata->fp = fopen(output_wpt,"w");
if (pdata->fp == NULL)
{
//todo
fprintf(stderr,"Failure opening File %s for writing",output_wpt);
exit(1);
}
free(output_wpt);
XML_SetUserData(parser, pdata);
XML_SetElementHandler(parser, startElement, endElement);
XML_SetCharacterDataHandler(parser, charHandle);
for (;;) {
int done;
int len;
fgets(buff, BUFFSIZE, fp);
len = (int) strlen(buff);
if (ferror(fp)) {
fprintf(stderr, "Read error file: %s\n", prop->sourcefile);
exit(ERR_READERROR);
}
done = feof(fp);
if (done)
break;
if (!XML_Parse(parser, buff, len, done)) {
fprintf(stderr, "Parse error at line %d:\n%s\n",
XML_GetCurrentLineNumber(parser),
XML_ErrorString(XML_GetErrorCode(parser)));
exit(ERR_PARSEERROR);
}
}
fclose(pdata->fp); //close out file
closeParsedata(pdata);
}
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