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/**
* Navit, a modular navigation system.
* Copyright (C) 2005-2011 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 <string.h>
#include <stdlib.h>
#include <math.h>
#include <unistd.h>
#include "maptool.h"
int
osm_xml_get_attribute(char *xml, char *attribute, char *buffer, int buffer_size)
{
int len=strlen(attribute);
char *pos,*i,s,attr[len+2];
strcpy(attr, attribute);
strcpy(attr+len, "=");
pos=strstr(xml, attr);
if (! pos)
return 0;
pos+=len+1;
s=*pos++;
if (! s)
return 0;
i=strchr(pos, s);
if (! i)
return 0;
if (i - pos > buffer_size) {
fprintf(stderr,"Buffer overflow %ld vs %d\n", (long)(i-pos), buffer_size);
return 0;
}
strncpy(buffer, pos, i-pos);
buffer[i-pos]='\0';
return 1;
}
static struct entity {
char *entity;
char c;
} entities[]= {
{""",'"'},
{"'",'\''},
{"&",'&'},
{"<",'<'},
{">",'>'},
{""",'"'},
{"'",'\''},
{"&",'&'},
{"<",'<'},
{">",'>'},
{"{",'{'},
{"}",'}'},
};
void
osm_xml_decode_entities(char *buffer)
{
char *pos=buffer;
int i,len,found;
while ((pos=strchr(pos, '&'))) {
found=0;
for (i = 0 ; i < sizeof(entities)/sizeof(struct entity); i++) {
len=strlen(entities[i].entity);
if (!strncmp(pos, entities[i].entity, len)) {
*pos=entities[i].c;
memmove(pos+1, pos+len, strlen(pos+len)+1);
found=1;
break;
}
}
pos++;
}
}
static int
parse_tag(char *p)
{
char k_buffer[BUFFER_SIZE];
char v_buffer[BUFFER_SIZE];
if (!osm_xml_get_attribute(p, "k", k_buffer, BUFFER_SIZE))
return 0;
if (!osm_xml_get_attribute(p, "v", v_buffer, BUFFER_SIZE))
return 0;
osm_xml_decode_entities(v_buffer);
osm_add_tag(k_buffer, v_buffer);
return 1;
}
static int
parse_node(char *p)
{
char id_buffer[BUFFER_SIZE];
char lat_buffer[BUFFER_SIZE];
char lon_buffer[BUFFER_SIZE];
if (!osm_xml_get_attribute(p, "id", id_buffer, BUFFER_SIZE))
return 0;
if (!osm_xml_get_attribute(p, "lat", lat_buffer, BUFFER_SIZE))
return 0;
if (!osm_xml_get_attribute(p, "lon", lon_buffer, BUFFER_SIZE))
return 0;
osm_add_node(atoll(id_buffer), atof(lat_buffer), atof(lon_buffer));
return 1;
}
static int
parse_way(char *p)
{
char id_buffer[BUFFER_SIZE];
if (!osm_xml_get_attribute(p, "id", id_buffer, BUFFER_SIZE))
return 0;
osm_add_way(atoll(id_buffer));
return 1;
}
static int
parse_relation(char *p)
{
char id_buffer[BUFFER_SIZE];
if (!osm_xml_get_attribute(p, "id", id_buffer, BUFFER_SIZE))
return 0;
osm_add_relation(atoll(id_buffer));
return 1;
}
static int
parse_member(char *p)
{
char type_buffer[BUFFER_SIZE];
char ref_buffer[BUFFER_SIZE];
char role_buffer[BUFFER_SIZE];
int type;
if (!osm_xml_get_attribute(p, "type", type_buffer, BUFFER_SIZE))
return 0;
if (!osm_xml_get_attribute(p, "ref", ref_buffer, BUFFER_SIZE))
return 0;
if (!osm_xml_get_attribute(p, "role", role_buffer, BUFFER_SIZE))
return 0;
if (!strcmp(type_buffer,"node"))
type=1;
else if (!strcmp(type_buffer,"way"))
type=2;
else if (!strcmp(type_buffer,"relation"))
type=3;
else {
fprintf(stderr,"Unknown type %s\n",type_buffer);
type=0;
}
osm_add_member(type, atoll(ref_buffer), role_buffer);
return 1;
}
static int
parse_nd(char *p)
{
char ref_buffer[BUFFER_SIZE];
if (!osm_xml_get_attribute(p, "ref", ref_buffer, BUFFER_SIZE))
return 0;
osm_add_nd(atoll(ref_buffer));
return 1;
}
static int
xml_declaration_in_line(char* buffer){
return !strncmp(buffer, "<?xml ", 6);
}
int
map_collect_data_osm(FILE *in, struct maptool_osm *osm)
{
int size=BUFFER_SIZE;
char buffer[size];
char *p;
sig_alrm(0);
if (!fgets(buffer, size, in) || !xml_declaration_in_line(buffer)){
fprintf(stderr,"FATAL: First line does not start with XML declaration;\n"
"this does not look like a valid OSM file.\n");
exit(EXIT_FAILURE);
}
while (fgets(buffer, size, in)) {
p=strchr(buffer,'<');
if (! p) {
fprintf(stderr,"FATAL: wrong line in input data (does not start with '<'): %s\n", buffer);
fprintf(stderr,"This does not look like a valid OSM file.\n"
"Note that maptool can only process OSM files without wrapped or empty lines.\n");
exit(EXIT_FAILURE);
}
if (!strncmp(p, "<osm ",5)) {
} else if (!strncmp(p, "<bound ",7)) {
} else if (!strncmp(p, "<node ",6)) {
if (!parse_node(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
processed_nodes++;
} else if (!strncmp(p, "<tag ",5)) {
if (!parse_tag(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
} else if (!strncmp(p, "<way ",5)) {
if (!parse_way(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
processed_ways++;
} else if (!strncmp(p, "<nd ",4)) {
if (!parse_nd(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
} else if (!strncmp(p, "<relation ",10)) {
if (!parse_relation(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
processed_relations++;
} else if (!strncmp(p, "<member ",8)) {
if (!parse_member(p))
fprintf(stderr,"WARNING: failed to parse %s\n", buffer);
} else if (!strncmp(p, "</node>",7)) {
osm_end_node(osm);
} else if (!strncmp(p, "</way>",6)) {
osm_end_way(osm);
} else if (!strncmp(p, "</relation>",11)) {
osm_end_relation(osm);
} else if (!strncmp(p, "</osm>",6)) {
} else {
fprintf(stderr,"WARNING: unknown tag in %s\n", buffer);
}
}
sig_alrm(0);
sig_alrm_end();
return 1;
}
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