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-rw-r--r--js/src/builtin/RegExp.js134
1 files changed, 65 insertions, 69 deletions
diff --git a/js/src/builtin/RegExp.js b/js/src/builtin/RegExp.js
index 1ffea01050..0b849292cf 100644
--- a/js/src/builtin/RegExp.js
+++ b/js/src/builtin/RegExp.js
@@ -122,8 +122,7 @@ function RegExpMatch(string) {
}
// Step 5.
- var sticky = !!(flags & REGEXP_STICKY_FLAG);
- return RegExpLocalMatchOpt(rx, S, sticky);
+ return RegExpBuiltinExec(rx, S, false);
}
// Stes 4-6
@@ -220,37 +219,6 @@ function RegExpGlobalMatchOpt(rx, S, fullUnicode) {
}
}
-// ES 2017 draft rev 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e 21.2.5.6 step 5.
-// Optimized path for @@match without global flag.
-function RegExpLocalMatchOpt(rx, S, sticky) {
- // Step 4.
- var lastIndex = ToLength(rx.lastIndex);
-
- // Step 8.
- if (!sticky) {
- lastIndex = 0;
- } else {
- if (lastIndex > S.length) {
- // Steps 12.a.i-ii, 12.c.i.1-2.
- rx.lastIndex = 0;
- return null;
- }
- }
-
- // Steps 3, 9-25, except 12.a.i-ii, 12.c.i.1-2, 15.
- var result = RegExpMatcher(rx, S, lastIndex);
- if (result === null) {
- // Steps 12.a.i-ii, 12.c.i.1-2.
- rx.lastIndex = 0;
- } else {
- // Step 15.
- if (sticky)
- rx.lastIndex = result.index + result[0].length;
- }
-
- return result;
-}
-
// Checks if following properties and getters are not modified, and accessing
// them not observed by content script:
// * flags
@@ -318,9 +286,10 @@ function RegExpReplace(string, replaceValue) {
if (functionalReplace) {
var elemBase = GetElemBaseForLambda(replaceValue);
- if (IsObject(elemBase))
+ if (IsObject(elemBase)) {
return RegExpGlobalReplaceOptElemBase(rx, S, lengthS, replaceValue,
fullUnicode, elemBase);
+ }
return RegExpGlobalReplaceOptFunc(rx, S, lengthS, replaceValue,
fullUnicode);
}
@@ -336,18 +305,11 @@ function RegExpReplace(string, replaceValue) {
fullUnicode);
}
- var sticky = !!(flags & REGEXP_STICKY_FLAG);
-
- if (functionalReplace) {
- return RegExpLocalReplaceOptFunc(rx, S, lengthS, replaceValue,
- sticky);
- }
- if (firstDollarIndex !== -1) {
- return RegExpLocalReplaceOptSubst(rx, S, lengthS, replaceValue,
- sticky, firstDollarIndex);
- }
- return RegExpLocalReplaceOpt(rx, S, lengthS, replaceValue,
- sticky);
+ if (functionalReplace)
+ return RegExpLocalReplaceOptFunc(rx, S, lengthS, replaceValue);
+ if (firstDollarIndex !== -1)
+ return RegExpLocalReplaceOptSubst(rx, S, lengthS, replaceValue, firstDollarIndex);
+ return RegExpLocalReplaceOpt(rx, S, lengthS, replaceValue);
}
// Steps 8-16.
@@ -647,7 +609,8 @@ function RegExpGlobalReplaceShortOpt(rx, S, lengthS, replaceValue, fullUnicode)
#undef SUBSTITUTION
#undef FUNC_NAME
-// ES 2017 draft 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e 21.2.5.9.
+// ES2017 draft rev 6390c2f1b34b309895d31d8c0512eac8660a0210
+// 21.2.5.9 RegExp.prototype [ @@search ] ( string )
function RegExpSearch(string) {
// Step 1.
var rx = this;
@@ -659,41 +622,69 @@ function RegExpSearch(string) {
// Step 3.
var S = ToString(string);
+ // Step 4.
+ var previousLastIndex = rx.lastIndex;
+
+ // Step 5.
+ var lastIndexIsZero = SameValue(previousLastIndex, 0);
+ if (!lastIndexIsZero)
+ rx.lastIndex = 0;
+
if (IsRegExpMethodOptimizable(rx) && S.length < 0x7fff) {
// Step 6.
var result = RegExpSearcher(rx, S, 0);
- // Step 8.
+ // We need to consider two cases:
+ //
+ // 1. Neither global nor sticky is set:
+ // RegExpBuiltinExec doesn't modify lastIndex for local RegExps, that
+ // means |SameValue(rx.lastIndex, 0)| is true after calling exec. The
+ // comparison in steps 7-8 |SameValue(rx.lastIndex, previousLastIndex)|
+ // is therefore equal to the already computed |lastIndexIsZero| value.
+ //
+ // 2. Global or sticky flag is set.
+ // RegExpBuiltinExec will always update lastIndex and we need to
+ // restore the property to its original value.
+
+ // Steps 7-8.
+ if (!lastIndexIsZero) {
+ rx.lastIndex = previousLastIndex;
+ } else {
+ var flags = UnsafeGetInt32FromReservedSlot(rx, REGEXP_FLAGS_SLOT);
+ if (flags & (REGEXP_GLOBAL_FLAG | REGEXP_STICKY_FLAG))
+ rx.lastIndex = previousLastIndex;
+ }
+
+ // Step 9.
if (result === -1)
return -1;
- // Step 9.
+ // Step 10.
return result & 0x7fff;
}
- return RegExpSearchSlowPath(rx, S);
+ return RegExpSearchSlowPath(rx, S, previousLastIndex);
}
-// ES 2017 draft 6859bb9ccaea9c6ede81d71e5320e3833b92cb3e 21.2.5.9
-// steps 4-9.
-function RegExpSearchSlowPath(rx, S) {
- // Step 4.
- var previousLastIndex = rx.lastIndex;
-
- // Step 5.
- rx.lastIndex = 0;
-
+// ES2017 draft rev 6390c2f1b34b309895d31d8c0512eac8660a0210
+// 21.2.5.9 RegExp.prototype [ @@search ] ( string )
+// Steps 6-10.
+function RegExpSearchSlowPath(rx, S, previousLastIndex) {
// Step 6.
var result = RegExpExec(rx, S, false);
// Step 7.
- rx.lastIndex = previousLastIndex;
+ var currentLastIndex = rx.lastIndex;
// Step 8.
+ if (!SameValue(currentLastIndex, previousLastIndex))
+ rx.lastIndex = previousLastIndex;
+
+ // Step 9.
if (result === null)
return -1;
- // Step 9.
+ // Step 10.
return result.index;
}
@@ -942,15 +933,16 @@ function RegExpExec(R, S, forTest) {
return forTest ? result !== null : result;
}
-// ES 2017 draft rev 6a13789aa9e7c6de4e96b7d3e24d9e6eba6584ad 21.2.5.2.2.
+// ES2017 draft rev 6390c2f1b34b309895d31d8c0512eac8660a0210
+// 21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S )
function RegExpBuiltinExec(R, S, forTest) {
- // ES6 21.2.5.2.1 step 6.
+ // 21.2.5.2.1 Runtime Semantics: RegExpExec, step 5.
// This check is here for RegExpTest. RegExp_prototype_Exec does same
// thing already.
if (!IsRegExpObject(R))
return UnwrapAndCallRegExpBuiltinExec(R, S, forTest);
- // Steps 1-2 (skipped).
+ // Steps 1-3 (skipped).
// Step 4.
var lastIndex = ToLength(R.lastIndex);
@@ -965,9 +957,11 @@ function RegExpBuiltinExec(R, S, forTest) {
if (!globalOrSticky) {
lastIndex = 0;
} else {
+ // Step 12.a.
if (lastIndex > S.length) {
- // Steps 12.a.i-ii, 12.c.i.1-2.
- R.lastIndex = 0;
+ // Steps 12.a.i-ii.
+ if (globalOrSticky)
+ R.lastIndex = 0;
return forTest ? false : null;
}
}
@@ -977,7 +971,8 @@ function RegExpBuiltinExec(R, S, forTest) {
var endIndex = RegExpTester(R, S, lastIndex);
if (endIndex == -1) {
// Steps 12.a.i-ii, 12.c.i.1-2.
- R.lastIndex = 0;
+ if (globalOrSticky)
+ R.lastIndex = 0;
return false;
}
@@ -991,8 +986,9 @@ function RegExpBuiltinExec(R, S, forTest) {
// Steps 3, 9-25, except 12.a.i-ii, 12.c.i.1-2, 15.
var result = RegExpMatcher(R, S, lastIndex);
if (result === null) {
- // Steps 12.a.i-ii, 12.c.i.1-2.
- R.lastIndex = 0;
+ // Steps 12.a.i, 12.c.i.
+ if (globalOrSticky)
+ R.lastIndex = 0;
} else {
// Step 15.
if (globalOrSticky)
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-20 06:20:57 +0000