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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:
// * 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 one of the following macros (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
// 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
#if defined(FUNCTIONAL)
var hasCaptureGroups = RegExpHasCaptureGroups(rx, S);
#endif
// Step 13 (reordered).
var accumulatedResult = "";
// Step 14 (reordered).
var nextSourcePosition = 0;
// Step 12.
while (true) {
var replacement;
var matchLength;
#if defined(FUNCTIONAL)
// If the regexp has no capture groups, use a fast path that doesn't
// allocate a match result object. This also inlines the call to
// RegExpGetFunctionalReplacement.
if (!hasCaptureGroups) {
// Step 12.a.
var position = RegExpSearcher(rx, S, lastIndex);
// Step 12.b.
if (position === -1) {
break;
}
// Steps 15.c-f.
lastIndex = RegExpSearcherLastLimit(S);
var matched = Substring(S, position, lastIndex - position);
matchLength = matched.length;
// Steps 15.g-l.
replacement = ToString(
callContentFunction(
replaceValue,
undefined,
matched,
position,
S
)
);
} else
#endif
{
// 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.
matchLength = matched.length | 0;
// Steps 15.e-f.
var position = result.index | 0;
lastIndex = position + matchLength;
// Steps 15.g-l.
#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
#error "Unexpected case"
#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)
);
}
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