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Implement FlatGeobuf Polygon type parsing [#2]

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This commit is contained in:
Brandon Liu
2022-03-27 19:13:03 +08:00
parent a3dec5116d
commit 8a5a2496c3
4 changed files with 186 additions and 3 deletions
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main.cpp
+70
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@@ -1354,6 +1354,76 @@ int read_input(std::vector<source> &sources, char *fname, int maxzoom, int minzo
}
size_t layer = a->second.id;
// geobuf
if (sources[source].format == "fgb" || (sources[source].file.size() > 4 && sources[source].file.substr(sources[source].file.size() - 4) == std::string(".fgb"))) {
struct stat st;
if (fstat(fd, &st) != 0) {
perror("fstat");
perror(sources[source].file.c_str());
exit(EXIT_FAILURE);
}
char *map = (char *) mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (map == MAP_FAILED) {
fprintf(stderr, "%s: mmap: %s: %s\n", *av, reading.c_str(), strerror(errno));
exit(EXIT_FAILURE);
}
std::atomic<long long> layer_seq[CPUS];
double dist_sums[CPUS];
size_t dist_counts[CPUS];
std::vector<struct serialization_state> sst;
sst.resize(CPUS);
for (size_t i = 0; i < CPUS; i++) {
layer_seq[i] = overall_offset;
dist_sums[i] = 0;
dist_counts[i] = 0;
sst[i].fname = reading.c_str();
sst[i].line = 0;
sst[i].layer_seq = &layer_seq[i];
sst[i].progress_seq = &progress_seq;
sst[i].readers = &readers;
sst[i].segment = i;
sst[i].initial_x = &initial_x[i];
sst[i].initial_y = &initial_y[i];
sst[i].initialized = &initialized[i];
sst[i].dist_sum = &dist_sums[i];
sst[i].dist_count = &dist_counts[i];
sst[i].want_dist = guess_maxzoom;
sst[i].maxzoom = maxzoom;
sst[i].filters = prefilter != NULL || postfilter != NULL;
sst[i].uses_gamma = uses_gamma;
sst[i].layermap = &layermaps[i];
sst[i].exclude = exclude;
sst[i].include = include;
sst[i].exclude_all = exclude_all;
sst[i].basezoom = basezoom;
sst[i].attribute_types = attribute_types;
}
parse_flatgeobuf(&sst, map, st.st_size, layer, sources[layer].layer);
for (size_t i = 0; i < CPUS; i++) {
dist_sum += dist_sums[i];
dist_count += dist_counts[i];
}
if (munmap(map, st.st_size) != 0) {
perror("munmap source file");
exit(EXIT_FAILURE);
}
if (close(fd) != 0) {
perror("close");
exit(EXIT_FAILURE);
}
overall_offset = layer_seq[0];
checkdisk(&readers);
continue;
}
if (sources[source].format == "geobuf" || (sources[source].file.size() > 7 && sources[source].file.substr(sources[source].file.size() - 7) == std::string(".geobuf"))) {
struct stat st;
if (fstat(fd, &st) != 0) {