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Factor out (initial) feature serialization

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This commit is contained in:
Eric Fischer
2016-08-08 15:36:49 -07:00
parent 6de7920c9e
commit bf571571a9
4 changed files with 109 additions and 56 deletions
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serial.cpp
+48
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@@ -2,7 +2,11 @@
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <vector>
#include <sqlite3.h>
#include "protozero/varint.hpp"
#include "geometry.hpp"
#include "tile.hpp"
#include "serial.hpp"
size_t fwrite_check(const void *ptr, size_t size, size_t nitems, FILE *stream, const char *fname) {
@@ -151,3 +155,47 @@ int deserialize_byte_io(FILE *f, signed char *n, long long *geompos) {
(*geompos)++;
return 1;
}
static void write_geometry(drawvec const &dv, long long *fpos, FILE *out, const char *fname, long long wx, long long wy) {
for (size_t i = 0; i < dv.size(); i++) {
if (dv[i].op == VT_CLOSEPATH) {
serialize_byte(out, dv[i].op, fpos, fname);
} else {
serialize_byte(out, dv[i].op, fpos, fname);
serialize_long_long(out, dv[i].x - wx, fpos, fname);
serialize_long_long(out, dv[i].y - wy, fpos, fname);
wx = dv[i].x;
wy = dv[i].y;
}
}
}
void serialize_feature(FILE *geomfile, serial_feature *sf, long long *geompos, const char *fname, long long wx, long long wy) {
serialize_byte(geomfile, sf->t, geompos, fname);
serialize_long_long(geomfile, sf->seq, geompos, fname);
serialize_long_long(geomfile, (sf->layer << 3) | (sf->has_id ? 4 : 0) | (sf->has_tippecanoe_minzoom ? 2 : 0) | (sf->has_tippecanoe_maxzoom ? 1 : 0), geompos, fname);
if (sf->has_tippecanoe_minzoom) {
serialize_int(geomfile, sf->tippecanoe_minzoom, geompos, fname);
}
if (sf->has_tippecanoe_maxzoom) {
serialize_int(geomfile, sf->tippecanoe_maxzoom, geompos, fname);
}
if (sf->has_id) {
serialize_ulong_long(geomfile, sf->id, geompos, fname);
}
serialize_int(geomfile, sf->segment, geompos, fname);
write_geometry(sf->geometry, geompos, geomfile, fname, wx, wy);
serialize_byte(geomfile, VT_END, geompos, fname);
serialize_int(geomfile, sf->m, geompos, fname);
serialize_long_long(geomfile, sf->metapos, geompos, fname);
for (size_t i = 0; i < sf->keys.size(); i++) {
serialize_long_long(geomfile, sf->keys[i], geompos, fname);
serialize_long_long(geomfile, sf->values[i], geompos, fname);
}
serialize_byte(geomfile, sf->feature_minzoom, geompos, fname);
}