Initial commit

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

@@ -0,0 +1,53 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.countToggledBits = countToggledBits;
+exports.computeNextFlags = computeNextFlags;
+exports.computeTogglePositions = computeTogglePositions;
+exports.computeFlagsFromChars = computeFlagsFromChars;
+exports.applyFlagsOnChars = applyFlagsOnChars;
+const globals_1 = require("../../../utils/globals");
+function countToggledBits(n) {
+    let count = 0;
+    while (n > (0, globals_1.BigInt)(0)) {
+        if (n & (0, globals_1.BigInt)(1))
+            ++count;
+        n >>= (0, globals_1.BigInt)(1);
+    }
+    return count;
+}
+function computeNextFlags(flags, nextSize) {
+    const allowedMask = ((0, globals_1.BigInt)(1) << (0, globals_1.BigInt)(nextSize)) - (0, globals_1.BigInt)(1);
+    const preservedFlags = flags & allowedMask;
+    let numMissingFlags = countToggledBits(flags - preservedFlags);
+    let nFlags = preservedFlags;
+    for (let mask = (0, globals_1.BigInt)(1); mask <= allowedMask && numMissingFlags !== 0; mask <<= (0, globals_1.BigInt)(1)) {
+        if (!(nFlags & mask)) {
+            nFlags |= mask;
+            --numMissingFlags;
+        }
+    }
+    return nFlags;
+}
+function computeTogglePositions(chars, toggleCase) {
+    const positions = [];
+    for (let idx = chars.length - 1; idx !== -1; --idx) {
+        if (toggleCase(chars[idx]) !== chars[idx])
+            (0, globals_1.safePush)(positions, idx);
+    }
+    return positions;
+}
+function computeFlagsFromChars(untoggledChars, toggledChars, togglePositions) {
+    let flags = (0, globals_1.BigInt)(0);
+    for (let idx = 0, mask = (0, globals_1.BigInt)(1); idx !== togglePositions.length; ++idx, mask <<= (0, globals_1.BigInt)(1)) {
+        if (untoggledChars[togglePositions[idx]] !== toggledChars[togglePositions[idx]]) {
+            flags |= mask;
+        }
+    }
+    return flags;
+}
+function applyFlagsOnChars(chars, flags, togglePositions, toggleCase) {
+    for (let idx = 0, mask = (0, globals_1.BigInt)(1); idx !== togglePositions.length; ++idx, mask <<= (0, globals_1.BigInt)(1)) {
+        if (flags & mask)
+            chars[togglePositions[idx]] = toggleCase(chars[togglePositions[idx]]);
+    }
+}