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-rw-r--r--js/src/builtin/RegExp.js80
-rw-r--r--js/src/builtin/RegExpLocalReplaceOpt.h.js12
-rw-r--r--js/src/builtin/Utilities.js12
3 files changed, 75 insertions, 29 deletions
diff --git a/js/src/builtin/RegExp.js b/js/src/builtin/RegExp.js
index f71ce4f75..0b849292c 100644
--- a/js/src/builtin/RegExp.js
+++ b/js/src/builtin/RegExp.js
@@ -609,7 +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;
@@ -621,41 +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;
}
@@ -904,15 +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);
@@ -927,9 +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;
}
}
@@ -939,7 +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;
}
@@ -953,8 +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)
diff --git a/js/src/builtin/RegExpLocalReplaceOpt.h.js b/js/src/builtin/RegExpLocalReplaceOpt.h.js
index 96451d8a0..1acd6a73a 100644
--- a/js/src/builtin/RegExpLocalReplaceOpt.h.js
+++ b/js/src/builtin/RegExpLocalReplaceOpt.h.js
@@ -11,7 +11,7 @@
// * FUNCTIONAL -- replaceValue is a function
// * neither of above -- replaceValue is a string without "$"
-// ES 2017 draft 03bfda119d060aca4099d2b77cf43f6d4f11cfa2 21.2.5.8
+// ES 2017 draft 6390c2f1b34b309895d31d8c0512eac8660a0210 21.2.5.8
// steps 11.a-16.
// Optimized path for @@replace with the following conditions:
// * global flag is false
@@ -36,8 +36,10 @@ function FUNC_NAME(rx, S, lengthS, replaceValue
if (globalOrSticky) {
// 21.2.5.2.2 RegExpBuiltinExec, step 12.a.
if (lastIndex > lengthS) {
- // FIXME: Implement changes for bug 1317397.
- rx.lastIndex = 0;
+ if (globalOrSticky)
+ rx.lastIndex = 0;
+
+ // Steps 12-16.
return S;
}
} else {
@@ -51,8 +53,8 @@ function FUNC_NAME(rx, S, lengthS, replaceValue
// Step 11.b.
if (result === null) {
// 21.2.5.2.2 RegExpBuiltinExec, steps 12.a.i, 12.c.i.
- // FIXME: Implement changes for bug 1317397.
- rx.lastIndex = 0;
+ if (globalOrSticky)
+ rx.lastIndex = 0;
// Steps 12-16.
return S;
diff --git a/js/src/builtin/Utilities.js b/js/src/builtin/Utilities.js
index 2dece3801..3145b4d51 100644
--- a/js/src/builtin/Utilities.js
+++ b/js/src/builtin/Utilities.js
@@ -106,7 +106,17 @@ function ToLength(v) {
return std_Math_min(v, 0x1fffffffffffff);
}
-/* Spec: ECMAScript Draft, 6th edition Oct 14, 2014, 7.2.4 */
+// ES2017 draft rev aebf014403a3e641fb1622aec47c40f051943527
+// 7.2.9 SameValue ( x, y )
+function SameValue(x, y) {
+ if (x === y) {
+ return (x !== 0) || (1 / x === 1 / y);
+ }
+ return (x !== x && y !== y);
+}
+
+// ES2017 draft rev aebf014403a3e641fb1622aec47c40f051943527
+// 7.2.10 SameValueZero ( x, y )
function SameValueZero(x, y) {
return x === y || (x !== x && y !== y);
}
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