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Limit detail to 30 and buffer 127 to prevent coordinate delta overflow

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This commit is contained in:
Eric Fischer
2018-12-18 15:53:11 -08:00
parent b31b0b04b6
commit 32b14b1269
4 changed files with 37 additions and 5 deletions
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mvt.cpp
+8 -3
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@@ -356,7 +356,7 @@ std::string mvt_tile::encode() {
std::vector<uint32_t> geometry;
int px = 0, py = 0;
long long px = 0, py = 0;
int cmd_idx = -1;
int cmd = -1;
int length = 0;
@@ -381,8 +381,13 @@ std::string mvt_tile::encode() {
long long wwx = geom[g].x;
long long wwy = geom[g].y;
int dx = wwx - px;
int dy = wwy - py;
long long dx = wwx - px;
long long dy = wwy - py;
if (dx < INT_MIN || dx > INT_MAX || dy < INT_MIN || dy > INT_MAX) {
fprintf(stderr, "Internal error: Geometry delta is too big: %lld,%lld\n", dx, dy);
exit(EXIT_FAILURE);
}
geometry.push_back(protozero::encode_zigzag32(dx));
geometry.push_back(protozero::encode_zigzag32(dy));