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Write the metadata file

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This commit is contained in:
Eric Fischer 2014-09-23 16:01:19 -07:00
parent 91eefcbd16
commit 5d7a2f50a9
3 changed files with 84 additions and 8 deletions
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84
geojson.c
View File

@ -301,7 +301,7 @@ void range_search(struct index *ix, long long n, unsigned long long start, unsig
}
}
void check(struct index *ix, long long n, char *metabase, unsigned *file_bbox) {
void check(struct index *ix, long long n, char *metabase, unsigned *file_bbox, struct pool *file_keys) {
fprintf(stderr, "\n");
int z;
@ -336,12 +336,25 @@ void check(struct index *ix, long long n, char *metabase, unsigned *file_bbox) {
printf("%d/%u/%u %x %x %lld to %lld\n", z, tx, ty, wx, wy, (long long)(i - ix), (long long)(j - ix));
write_tile(i, j, metabase, file_bbox, z, tx, ty, z == BASE_ZOOM ? 12 : 10, BASE_ZOOM);
write_tile(i, j, metabase, file_bbox, z, tx, ty, z == BASE_ZOOM ? 12 : 10, BASE_ZOOM, file_keys);
}
}
}
void read_json(FILE *f) {
void quote(FILE *fp, char *s) {
for (; *s != '\0'; s++) {
if (*s == '\\' || *s == '\"') {
fputc('\\', fp);
fputc(*s, fp);
} else if (*s < ' ') {
fprintf(fp, "\\u%04x", *s);
} else {
fputc(*s, fp);
}
}
}
void read_json(FILE *f, char *fname) {
char metaname[] = "/tmp/meta.XXXXXXXX";
char indexname[] = "/tmp/index.XXXXXXXX";
@ -529,14 +542,73 @@ next_feature:
exit(EXIT_FAILURE);
}
struct pool file_keys;
file_keys.n = 0;
file_keys.vals = NULL;
file_keys.head = NULL;
file_keys.tail = NULL;
qsort(index, indexst.st_size / sizeof(struct index), sizeof(struct index), indexcmp);
check(index, indexst.st_size / sizeof(struct index), meta, file_bbox);
check(index, indexst.st_size / sizeof(struct index), meta, file_bbox, &file_keys);
munmap(index, indexst.st_size);
munmap(meta, metast.st_size);
close(indexfd);
close(metafd);
FILE *fp = fopen("tiles/metadata.json", "w");
if (fp == NULL) {
fprintf(stderr, "metadata.json: %s\n", strerror(errno));
} else {
fprintf(fp, "{\n");
fprintf(fp, "\"name\": \"");
quote(fp, fname);
fprintf(fp, "\",\n");
fprintf(fp, "\"description\": \"");
quote(fp, fname);
fprintf(fp, "\",\n");
double minlat = 0, minlon = 0, maxlat = 0, maxlon = 0, midlat = 0, midlon = 0;
fprintf(fp, "\"version\": 1,\n");
fprintf(fp, "\"minzoom\": %d,\n", 0);
fprintf(fp, "\"maxzoom\": %d,\n", BASE_ZOOM);
fprintf(fp, "\"center\": \"%f,%f,%d\",\n", midlon, midlat, BASE_ZOOM);
fprintf(fp, "\"bounds\": \"%f,%f,%f,%f\",\n", minlon, minlat, maxlon, maxlat);
fprintf(fp, "\"type\": \"overlay\",\n");
fprintf(fp, "\"json\": \"{");
fprintf(fp, "\\\"vector_layers\\\": [ { \\\"id\\\": \\\"");
quote(fp, "name");
fprintf(fp, "\\\", \\\"description\\\": \\\"\\\", \\\"minzoom\\\": %d, \\\"maxzoom\\\": %d, \\\"fields\\\": {", 0, BASE_ZOOM);
struct pool_val *pv;
for (pv = file_keys.head; pv != NULL; pv = pv->next) {
fprintf(fp, "\\\"");
quote(fp, pv->s);
if (pv->type == VT_NUMBER) {
fprintf(fp, "\\\": \\\"Number\\\"");
} else {
fprintf(fp, "\\\": \\\"String\\\"");
}
if (pv->next != NULL) {
fprintf(fp, ", ");
}
}
fprintf(fp, "} } ]");
fprintf(fp, "}\",\n");
fprintf(fp, "\"format\": \"%s\"\n", "pbf"); // no trailing comma
fprintf(fp, "}\n");
fclose(fp);
}
}
int main(int argc, char **argv) {
@ -547,12 +619,12 @@ int main(int argc, char **argv) {
if (f == NULL) {
fprintf(stderr, "%s: %s: %s\n", argv[0], argv[i], strerror(errno));
} else {
read_json(f);
read_json(f, argv[i]);
fclose(f);
}
}
} else {
read_json(stdin);
read_json(stdin, "standard input");
}
return 0;
}

5
tile.cc
View File

@ -122,7 +122,7 @@ int draw(char **meta, mapnik::vector::tile_feature *feature, int z, unsigned tx,
}
void write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned tx, unsigned ty, int detail, int basezoom) {
void write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned tx, unsigned ty, int detail, int basezoom, struct pool *file_keys) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
mapnik::vector::tile tile;
@ -199,6 +199,9 @@ void write_tile(struct index *start, struct index *end, char *metabase, unsigned
feature->add_tags(key->n);
feature->add_tags(value->n);
// Dup to retain after munmap
pool(file_keys, strdup(key->s), t);
}
}
}

3
tile.h
View File

@ -36,6 +36,7 @@ struct pool {
void deserialize_int(char **f, int *n);
struct pool_val *deserialize_string(char **f, struct pool *p, int type);
struct pool_val *pool(struct pool *p, char *s, int type);
void pool_free(struct pool *p);
@ -47,4 +48,4 @@ struct index {
};
void write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int basezoom);
void write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int basezoom, struct pool *file_keys);