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-rw-r--r--js/src/builtin/RegExpGlobalReplaceOpt.h.js174
1 files changed, 174 insertions, 0 deletions
diff --git a/js/src/builtin/RegExpGlobalReplaceOpt.h.js b/js/src/builtin/RegExpGlobalReplaceOpt.h.js
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+++ b/js/src/builtin/RegExpGlobalReplaceOpt.h.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Function template for the following functions:
+// * RegExpGlobalReplaceOpt
+// * RegExpGlobalReplaceOptFunc
+// * RegExpGlobalReplaceOptSubst
+// * RegExpGlobalReplaceOptElemBase
+// Define the following macro and include this file to declare function:
+// * FUNC_NAME -- function name (required)
+// e.g.
+// #define FUNC_NAME RegExpGlobalReplaceOpt
+// Define the following macro (without value) to switch the code:
+// * SUBSTITUTION -- replaceValue is a string with "$"
+// * FUNCTIONAL -- replaceValue is a function
+// * ELEMBASE -- replaceValue is a function that returns an element
+// of an object
+// * none of above -- replaceValue is a string without "$"
+
+// ES2023 draft rev 2c78e6f6b5bc6bfbf79dd8a12a9593e5b57afcd2
+// 22.2.5.11 RegExp.prototype [ @@replace ] ( string, replaceValue )
+// steps 9-17.
+// Optimized path for @@replace with the following conditions:
+// * global flag is true
+function FUNC_NAME(
+ rx,
+ S,
+ lengthS,
+ replaceValue,
+ flags,
+#ifdef SUBSTITUTION
+ firstDollarIndex,
+#endif
+#ifdef ELEMBASE
+ elemBase
+#endif
+) {
+ // Step 9.a.
+ var fullUnicode = !!(flags & REGEXP_UNICODE_FLAG);
+
+ // Step 9.b.
+ var lastIndex = 0;
+ rx.lastIndex = 0;
+
+#if defined(FUNCTIONAL) || defined(ELEMBASE)
+ // Save the original source and flags, so we can check if the replacer
+ // function recompiled the regexp.
+ var originalSource = UnsafeGetStringFromReservedSlot(rx, REGEXP_SOURCE_SLOT);
+ var originalFlags = flags;
+#endif
+
+ // Step 13 (reordered).
+ var accumulatedResult = "";
+
+ // Step 14 (reordered).
+ var nextSourcePosition = 0;
+
+ // Step 12.
+ while (true) {
+ // Step 12.a.
+ var result = RegExpMatcher(rx, S, lastIndex);
+
+ // Step 12.b.
+ if (result === null) {
+ break;
+ }
+
+ // Steps 15.a-b (skipped).
+ assert(result.length >= 1, "RegExpMatcher doesn't return an empty array");
+
+ // Step 15.c.
+ var matched = result[0];
+
+ // Step 15.d.
+ var matchLength = matched.length | 0;
+
+ // Steps 15.e-f.
+ var position = result.index | 0;
+ lastIndex = position + matchLength;
+
+ // Steps 15.g-l.
+ var replacement;
+#if defined(FUNCTIONAL)
+ replacement = RegExpGetFunctionalReplacement(
+ result,
+ S,
+ position,
+ replaceValue
+ );
+#elif defined(SUBSTITUTION)
+ // Step 15.l.i
+ var namedCaptures = result.groups;
+ if (namedCaptures !== undefined) {
+ namedCaptures = ToObject(namedCaptures);
+ }
+ // Step 15.l.ii
+ replacement = RegExpGetSubstitution(
+ result,
+ S,
+ position,
+ replaceValue,
+ firstDollarIndex,
+ namedCaptures
+ );
+#elif defined(ELEMBASE)
+ if (IsObject(elemBase)) {
+ var prop = GetStringDataProperty(elemBase, matched);
+ if (prop !== undefined) {
+ assert(
+ typeof prop === "string",
+ "GetStringDataProperty should return either string or undefined"
+ );
+ replacement = prop;
+ } else {
+ elemBase = undefined;
+ }
+ }
+
+ if (!IsObject(elemBase)) {
+ replacement = RegExpGetFunctionalReplacement(
+ result,
+ S,
+ position,
+ replaceValue
+ );
+ }
+#else
+ replacement = replaceValue;
+#endif
+
+ // Step 15.m.ii.
+ accumulatedResult +=
+ Substring(S, nextSourcePosition, position - nextSourcePosition) +
+ replacement;
+
+ // Step 15.m.iii.
+ nextSourcePosition = lastIndex;
+
+ // Step 12.c.iii.2.
+ if (matchLength === 0) {
+ lastIndex = fullUnicode
+ ? AdvanceStringIndex(S, lastIndex)
+ : lastIndex + 1;
+ if (lastIndex > lengthS) {
+ break;
+ }
+ lastIndex |= 0;
+ }
+
+#if defined(FUNCTIONAL) || defined(ELEMBASE)
+ // Ensure the current source and flags match the original regexp, the
+ // replaceValue function may have called RegExp#compile.
+ if (
+ UnsafeGetStringFromReservedSlot(rx, REGEXP_SOURCE_SLOT) !==
+ originalSource ||
+ UnsafeGetInt32FromReservedSlot(rx, REGEXP_FLAGS_SLOT) !== originalFlags
+ ) {
+ rx = RegExpConstructRaw(originalSource, originalFlags);
+ }
+#endif
+ }
+
+ // Step 16.
+ if (nextSourcePosition >= lengthS) {
+ return accumulatedResult;
+ }
+
+ // Step 17.
+ return (
+ accumulatedResult +
+ Substring(S, nextSourcePosition, lengthS - nextSourcePosition)
+ );
+}