Initial commit

node_modules/fast-check/lib/arbitrary/_internals/helpers/FloatHelpers.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.EPSILON_32 = exports.MAX_VALUE_32 = exports.MIN_VALUE_32 = void 0;
+exports.decomposeFloat = decomposeFloat;
+exports.floatToIndex = floatToIndex;
+exports.indexToFloat = indexToFloat;
+const safeNegativeInfinity = Number.NEGATIVE_INFINITY;
+const safePositiveInfinity = Number.POSITIVE_INFINITY;
+exports.MIN_VALUE_32 = 2 ** -126 * 2 ** -23;
+exports.MAX_VALUE_32 = 2 ** 127 * (1 + (2 ** 23 - 1) / 2 ** 23);
+exports.EPSILON_32 = 2 ** -23;
+const INDEX_POSITIVE_INFINITY = 2139095040;
+const INDEX_NEGATIVE_INFINITY = -2139095041;
+const f32 = new Float32Array(1);
+const u32 = new Uint32Array(f32.buffer, f32.byteOffset);
+function bitCastFloatToUInt32(f) {
+    f32[0] = f;
+    return u32[0];
+}
+function decomposeFloat(f) {
+    const bits = bitCastFloatToUInt32(f);
+    const signBit = bits >>> 31;
+    const exponentBits = (bits >>> 23) & 0xff;
+    const significandBits = bits & 0x7fffff;
+    const exponent = exponentBits === 0 ? -126 : exponentBits - 127;
+    let significand = exponentBits === 0 ? 0 : 1;
+    significand += significandBits / 2 ** 23;
+    significand *= signBit === 0 ? 1 : -1;
+    return { exponent, significand };
+}
+function indexInFloatFromDecomp(exponent, significand) {
+    if (exponent === -126) {
+        return significand * 0x800000;
+    }
+    return (exponent + 127) * 0x800000 + (significand - 1) * 0x800000;
+}
+function floatToIndex(f) {
+    if (f === safePositiveInfinity) {
+        return INDEX_POSITIVE_INFINITY;
+    }
+    if (f === safeNegativeInfinity) {
+        return INDEX_NEGATIVE_INFINITY;
+    }
+    const decomp = decomposeFloat(f);
+    const exponent = decomp.exponent;
+    const significand = decomp.significand;
+    if (f > 0 || (f === 0 && 1 / f === safePositiveInfinity)) {
+        return indexInFloatFromDecomp(exponent, significand);
+    }
+    else {
+        return -indexInFloatFromDecomp(exponent, -significand) - 1;
+    }
+}
+function indexToFloat(index) {
+    if (index < 0) {
+        return -indexToFloat(-index - 1);
+    }
+    if (index === INDEX_POSITIVE_INFINITY) {
+        return safePositiveInfinity;
+    }
+    if (index < 0x1000000) {
+        return index * 2 ** -149;
+    }
+    const postIndex = index - 0x1000000;
+    const exponent = -125 + (postIndex >> 23);
+    const significand = 1 + (postIndex & 0x7fffff) / 0x800000;
+    return significand * 2 ** exponent;
+}