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Guard against impossible zoom level

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This commit is contained in:
Eric Fischer 2017-10-27 17:40:39 -07:00
parent d13e08c9b5
commit dfbb13e7db
1 changed files with 5 additions and 0 deletions
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5
enumerate.cpp
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@ -24,6 +24,11 @@ void enumerate(char *fname) {
long long x = sqlite3_column_int(stmt, 1);
long long y = sqlite3_column_int(stmt, 2);
if (zoom < 0 || zoom > 31) {
fprintf(stderr, "Corrupt mbtiles file: impossible zoom level %lld\n", zoom);
exit(EXIT_FAILURE);
}
y = (1LL << zoom) - 1 - y;
printf("%s %lld %lld %lld\n", fname, zoom, x, y);
}