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Getting a little closer to 128-bit indices

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This commit is contained in:
Erica Fischer
2024-04-03 14:21:32 -07:00
parent 6c148a63f7
commit da94dbf9c4
3 changed files with 23 additions and 8 deletions
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serial.cpp
+19 -4
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@@ -92,6 +92,11 @@ void serialize_ulong_long(std::string &out, unsigned long long zigzag) {
out.append(buf, s - buf);
}
void serialize_index(std::string &out, index_t zigzag) {
serialize_ulong_long(out, zigzag);
serialize_ulong_long(out, ((__uint128_t) zigzag) >> 64);
}
void serialize_long_long(std::string &out, long long n) {
unsigned long long zigzag = protozero::encode_zigzag64(n);
@@ -142,6 +147,16 @@ void deserialize_ulong_long(const char **f, unsigned long long *zigzag) {
}
}
void deserialize_index(const char **f, index_t *zigzag) {
unsigned long long bottom;
unsigned long long top;
deserialize_ulong_long(f, &bottom);
deserialize_ulong_long(f, &top);
*zigzag = (((__uint128_t) top) << 64) | bottom;
}
void deserialize_uint(const char **f, unsigned *n) {
unsigned long long v;
deserialize_ulong_long(f, &v);
@@ -209,10 +224,10 @@ std::string serialize_feature(serial_feature *sf, long long wx, long long wy) {
write_geometry(sf->geometry, s, wx, wy);
if (sf->index != 0) {
serialize_ulong_long(s, sf->index);
serialize_index(s, sf->index);
}
if (sf->label_point != 0) {
serialize_ulong_long(s, sf->label_point);
serialize_index(s, sf->label_point);
}
if (sf->extent != 0) {
serialize_long_long(s, sf->extent);
@@ -264,10 +279,10 @@ serial_feature deserialize_feature(std::string const &geoms, unsigned z, unsigne
sf.geometry = decode_geometry(&cp, z, tx, ty, sf.bbox, initial_x[sf.segment], initial_y[sf.segment]);
if (sf.layer & (1 << FLAG_INDEX)) {
deserialize_ulong_long(&cp, &sf.index);
deserialize_index(&cp, &sf.index);
}
if (sf.layer & (1 << FLAG_LABEL_POINT)) {
deserialize_ulong_long(&cp, &sf.label_point);
deserialize_index(&cp, &sf.label_point);
}
if (sf.layer & (1 << FLAG_EXTENT)) {
deserialize_long_long(&cp, &sf.extent);