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Add a helper method to manage the tile layer's key-value constant pool

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This commit is contained in:
Eric Fischer
2016-04-25 14:20:21 -07:00
parent 2dea1d1564
commit 7bb4c7dbe9
4 changed files with 76 additions and 84 deletions
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mvt.hh
+12
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@@ -1,3 +1,6 @@
struct mvt_value;
struct mvt_layer;
enum mvt_operation {
mvt_moveto = 1,
mvt_lineto = 2,
@@ -45,6 +48,8 @@ struct mvt_value {
long long sint_value;
bool bool_value;
} numeric_value;
bool operator<(const mvt_value &o) const;
};
struct mvt_layer {
@@ -54,6 +59,13 @@ struct mvt_layer {
std::vector<std::string> keys;
std::vector<mvt_value> values;
int extent;
// Add a key-value pair to a feature, using this layer's constant pool
void tag(mvt_feature &feature, std::string key, mvt_value value);
// For tracking the key-value constants already used in this layer
std::map<std::string, size_t> key_map;
std::map<mvt_value, size_t> value_map;
};
struct mvt_tile {