/usr/share/javascript/proj4/lib/common/asinz.js is in libjs-proj4 2.3.17+ds-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | module.exports = function(x) {
if (Math.abs(x) > 1) {
x = (x > 1) ? 1 : -1;
}
return Math.asin(x);
};
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