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LibRegex: Fix greedy/reluctant modifiers in PosixExtendedParser

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Also fixes the issue with assertions causing early termination when
they fail.
This commit is contained in:
AnotherTest
2020-11-19 18:57:39 +03:30
committed by Andreas Kling
parent 45e5661296
commit 92ea9ed4a5
5 changed files with 42 additions and 26 deletions
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20
Libraries/LibRegex/RegexByteCode.h
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@@ -204,7 +204,7 @@ public:
void insert_bytecode_alternation(ByteCode&& left, ByteCode&& right)
{
// FORKSTAY _ALT
// FORKJUMP _ALT
// REGEXP ALT1
// JUMP _END
// LABEL _ALT
@@ -266,12 +266,12 @@ public:
{
// LABEL _START = -bytecode_to_repeat.size()
// REGEXP
// FORKJUMP _START (FORKSTAY -> Greedy)
// FORKSTAY _START (FORKJUMP -> Greedy)
if (greedy)
bytecode_to_repeat.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkStay));
else
bytecode_to_repeat.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkJump));
else
bytecode_to_repeat.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkStay));
bytecode_to_repeat.empend(-(bytecode_to_repeat.size() + 1)); // Jump to the _START label
}
@@ -279,7 +279,7 @@ public:
void insert_bytecode_repetition_any(ByteCode& bytecode_to_repeat, bool greedy)
{
// LABEL _START
// FORKSTAY _END (FORKJUMP -> Greedy)
// FORKJUMP _END (FORKSTAY -> Greedy)
// REGEXP
// JUMP _START
// LABEL _END
@@ -288,9 +288,9 @@ public:
ByteCode bytecode;
if (greedy)
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkJump));
else
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkStay));
else
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkJump));
bytecode.empend(bytecode_to_repeat.size() + 2); // Jump to the _END label
@@ -306,15 +306,15 @@ public:
void insert_bytecode_repetition_zero_or_one(ByteCode& bytecode_to_repeat, bool greedy)
{
// FORKSTAY _END (FORKJUMP -> Greedy)
// FORKJUMP _END (FORKSTAY -> Greedy)
// REGEXP
// LABEL _END
ByteCode bytecode;
if (greedy)
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkJump));
else
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkStay));
else
bytecode.empend(static_cast<ByteCodeValueType>(OpCodeId::ForkJump));
bytecode.empend(bytecode_to_repeat.size()); // Jump to the _END label