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Use 128-bit arithmetic to avoid overflow

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Erica Fischer
2024-03-18 11:37:47 -07:00
parent cc6135dd02
commit 3b948e0f20
4 changed files with 24 additions and 36 deletions
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main.cpp
+1 -1
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@@ -2431,7 +2431,7 @@ std::pair<int, metadata> read_input(std::vector<source> &sources, char *fname, i
double total_tile_count = 0;
for (int i = 1; i <= maxzoom; i++) {
double tile_count = ceil(area_sum / ((1LL << (GLOBAL_DETAIL - i)) * (1LL << (GLOBAL_DETAIL - i))));
double tile_count = ceil(area_sum / ((__int128) (1LL << (GLOBAL_DETAIL - i)) * (1LL << (GLOBAL_DETAIL - i))));
total_tile_count += tile_count;
// 2M tiles is an arbitrary limit, chosen to make tiling jobs