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#include <stdio.h>
#include <string.h>
#include <time.h>
#include "maptool.h"
static int print;
static char *types[]={"node","way","relation"};
struct o5m {
unsigned char buffer[65536*2];
int buffer_size;
unsigned char *buffer_start;
unsigned char *buffer_end;
FILE *in;
int error;
int lat, lon, uid, version;
unsigned long long id, rid[3], changeset;
time_t timestamp;
char *user;
};
static struct string_table {
char strings[15000][256];
int pos;
} st;
static double latlon_scale=10000000.0;
#define buffer_end(o,x) ((o)->buffer_start+(x) > (o)->buffer_end && !fill_buffer((o), (x)))
static int
fill_buffer(struct o5m *o, int min)
{
int count;
memmove(o->buffer, o->buffer_start, o->buffer_end-o->buffer_start);
o->buffer_end-=o->buffer_start-o->buffer;
o->buffer_start=o->buffer;
count=fread(o->buffer_end, 1, o->buffer+o->buffer_size-o->buffer_end, o->in);
if (!count)
return 0;
o->buffer_end+=count;
return (min <= o->buffer_end - o->buffer);
}
static unsigned long long
get_uval(unsigned char **p)
{
unsigned char c;
unsigned long long ret=0;
int shift=0;
for (;;) {
c=*((*p)++);
ret+=((unsigned long long)c & 0x7f) << shift;
if (!(c & 0x80))
return ret;
shift+=7;
}
}
static long long
get_sval(unsigned char **p)
{
unsigned long long ret=get_uval(p);
if (ret & 1) {
return -((long long)(ret >> 1)+1);
} else {
return ret >> 1;
}
}
static void
get_strings(struct string_table *st, unsigned char **p, char **s1, char **s2)
{
int len,xlen=0;
*s1=(char *)*p;
len=strlen(*s1);
xlen=1;
if (s2) {
*s2=*s1+len+1;
len+=strlen(*s2);
xlen++;
}
(*p)+=len+xlen;
if (len <= 250) {
memcpy(st->strings[st->pos++], *s1, len+xlen);
if (st->pos >= 15000)
st->pos=0;
}
}
static void
get_strings_ref(struct string_table *st, int ref, char **s1, char **s2)
{
int pos=st->pos-ref;
if (pos < 0)
pos+=15000;
*s1=st->strings[pos];
if (s2)
*s2=*s1+strlen(*s1)+1;
}
static void
print_escaped(char *s)
{
for (;;) {
switch (*s) {
case 0:
return;
case 9:
case 13:
case 34:
case 38:
case 39:
case 60:
case 62:
printf("&#%d;",*s);
break;
default:
putc(*s,stdout);
break;
}
s++;
}
}
static void
o5m_reset(struct o5m *o)
{
o->lat=0;
o->lon=0;
o->id=0;
o->rid[0]=0;
o->rid[1]=0;
o->rid[2]=0;
o->changeset=0;
o->timestamp=0;
}
static void
o5m_print_start(struct o5m *o, int c)
{
printf("\t<%s id=\""LONGLONG_FMT"\"",types[c-0x10],o->id);
}
static void
o5m_print_version(struct o5m *o, int tags)
{
char timestamp_str[64];
if (o->version) {
strftime(timestamp_str, sizeof(timestamp_str), "%Y-%m-%dT%H:%M:%SZ", gmtime(&o->timestamp));
printf(" version=\"%d\" timestamp=\"%s\" changeset=\""LONGLONG_FMT"\"",o->version,timestamp_str,o->changeset);
if (o->uid) {
printf(" uid=\"%d\" user=\"",o->uid);
print_escaped(o->user);
printf("\"");
}
}
printf("%s\n",tags?">":"/>");
}
static void
o5m_print_end(char c)
{
printf("\t</%s>\n",types[c-0x10]);
}
int
map_collect_data_osm_o5m(FILE *in, struct maptool_osm *osm)
{
struct o5m o;
unsigned char c, *end, *rend;
int len, rlen, ref, tags;
char *uidstr, *role;
if (print) {
printf("<?xml version='1.0' encoding='UTF-8'?>\n");
printf("<osm version=\"0.6\" generator=\"osmconvert 0.1X6\">\n");
}
o5m_reset(&o);
o.buffer_size=sizeof(o.buffer);
o.buffer_start=o.buffer;
o.buffer_end=o.buffer;
o.error=0;
o.in=in;
fill_buffer(&o,1);
for (;;) {
if (buffer_end(&o, 1)) {
fprintf(stderr,"unexpected eof\n");
return 1;
}
c=*(o.buffer_start++);
switch (c) {
case 0x10:
case 0x11:
case 0x12:
(void)buffer_end(&o, 4);
len=get_uval(&o.buffer_start);
if (o.buffer_start > o.buffer_end) {
fprintf(stderr,"unexpected eof\n");
return 0;
}
if (buffer_end(&o, len)) {
fprintf(stderr,"unexpected eof or buffer too small, item type %d, item size %d\n", c, len);
return 0;
}
end=o.buffer_start+len;
o.id+=get_sval(&o.buffer_start);
o.version=get_uval(&o.buffer_start);
if (o.version) {
o.timestamp+=get_sval(&o.buffer_start);
if (o.timestamp) {
o.changeset+=get_sval(&o.buffer_start);
ref=get_uval(&o.buffer_start);
if (ref)
get_strings_ref(&st, ref, &uidstr, &o.user);
else
get_strings(&st, &o.buffer_start, &uidstr, &o.user);
o.uid=get_uval((unsigned char **)&uidstr);
}
}
if (print)
o5m_print_start(&o, c);
switch (c) {
case 0x10:
o.lon+=get_sval(&o.buffer_start);
o.lat+=get_sval(&o.buffer_start);
osm_add_node(o.id, o.lat/latlon_scale,o.lon/latlon_scale);
tags=end > o.buffer_start;
if (print) {
printf(" lat=\"%.7f\" lon=\"%.7f\"",o.lat/10000000.0,o.lon/10000000.0);
o5m_print_version(&o, tags);
}
break;
case 0x11:
osm_add_way(o.id);
rlen=get_uval(&o.buffer_start);
tags=end > o.buffer_start;
rend=o.buffer_start+rlen;
if (print)
o5m_print_version(&o, tags);
while (o.buffer_start < rend) {
o.rid[0]+=get_sval(&o.buffer_start);
osm_add_nd(o.rid[0]);
if (print)
printf("\t\t<nd ref=\""LONGLONG_FMT"\"/>\n",o.rid[0]);
}
break;
case 0x12:
osm_add_relation(o.id);
rlen=get_uval(&o.buffer_start);
tags=end > o.buffer_start;
rend=o.buffer_start+rlen;
if (print)
o5m_print_version(&o, tags);
while (o.buffer_start < rend) {
long long delta=get_sval(&o.buffer_start);
int r;
ref=get_uval(&o.buffer_start);
if (ref)
get_strings_ref(&st, ref, &role, NULL);
else
get_strings(&st, &o.buffer_start, &role, NULL);
r=role[0]-'0';
if (r < 0)
r=0;
if (r > 2)
r=2;
o.rid[r]+=delta;
osm_add_member(r+1, o.rid[r], role+1);
if (print)
printf("\t\t<member type=\"%s\" ref=\""LONGLONG_FMT"\" role=\"%s\"/>\n",types[r], o.rid[r], role+1);
}
break;
}
while (end > o.buffer_start) {
char *k, *v;
ref=get_uval(&o.buffer_start);
if (ref)
get_strings_ref(&st, ref, &k, &v);
else
get_strings(&st, &o.buffer_start, &k, &v);
osm_add_tag(k, v);
if (print) {
printf("\t\t<tag k=\"");
print_escaped(k);
printf("\" v=\"");
print_escaped(v);
printf("\"/>\n");
}
}
if (print && tags) {
o5m_print_end(c);
}
switch (c) {
case 0x10:
osm_end_node(osm);
break;
case 0x11:
osm_end_way(osm);
break;
case 0x12:
osm_end_relation(osm);
break;
}
break;
case 0xdb:
if (print)
printf("\t<bounds minlat=\"-180.0000000\" minlon=\"-90.0000000\" maxlat=\"180.0000000\" maxlon=\"90.0000000\"/>\n");
len=get_uval(&o.buffer_start);
if (o.buffer_start > o.buffer_end) {
return 0;
}
if (buffer_end(&o, len)) {
return 0;
}
o.buffer_start+=len;
break;
case 0xe0:
if (buffer_end(&o, 5))
return 0;
o.buffer_start+=5;
break;
case 0xfe:
return 1;
case 0xff:
o5m_reset(&o);
break;
default:
fprintf(stderr,"Unknown tag 0x%x\n",c);
/* Fall through */
case 0xdc: /* File timestamp: silently ignore it */
len=get_uval(&o.buffer_start);
if (o.buffer_start > o.buffer_end) {
return 0;
}
if (buffer_end(&o, len)) {
return 0;
}
o.buffer_start+=len;
break;
}
}
return 0;
}
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