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Logical combination: support EOD match from purely negative case.

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Chang, Harry
2019-03-27 15:19:14 +08:00
parent 7ea4e06275
commit 1f4c10a58d
18 changed files with 437 additions and 92 deletions
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43
src/parser/logical_combination.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2018, Intel Corporation
* Copyright (c) 2018-2019, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -254,44 +254,6 @@ void popOperator(vector<LogicalOperator> &op_stack, vector<u32> &subid_stack,
op_stack.pop_back();
}
static
char getValue(const vector<char> &lv, u32 ckey) {
if (ckey & LOGICAL_OP_BIT) {
return lv[ckey & ~LOGICAL_OP_BIT];
} else {
return 0;
}
}
static
bool hasMatchFromPurelyNegative(const vector<LogicalOp> &tree,
u32 start, u32 result) {
vector<char> lv(tree.size());
assert(start <= result);
for (u32 i = start; i <= result; i++) {
assert(i & LOGICAL_OP_BIT);
const LogicalOp &op = tree[i & ~LOGICAL_OP_BIT];
assert(i == op.id);
switch (op.op) {
case LOGICAL_OP_NOT:
lv[op.id & ~LOGICAL_OP_BIT] = !getValue(lv, op.ro);
break;
case LOGICAL_OP_AND:
lv[op.id & ~LOGICAL_OP_BIT] = getValue(lv, op.lo) &
getValue(lv, op.ro);
break;
case LOGICAL_OP_OR:
lv[op.id & ~LOGICAL_OP_BIT] = getValue(lv, op.lo) |
getValue(lv, op.ro);
break;
default:
assert(0);
break;
}
}
return lv[result & ~LOGICAL_OP_BIT];
}
void ParsedLogical::parseLogicalCombination(unsigned id, const char *logical,
u32 ekey, u64a min_offset,
u64a max_offset) {
@@ -366,9 +328,6 @@ void ParsedLogical::parseLogicalCombination(unsigned id, const char *logical,
if (lkey_start == INVALID_LKEY) {
throw CompileError("No logical operation.");
}
if (hasMatchFromPurelyNegative(logicalTree, lkey_start, lkey_result)) {
throw CompileError("Has match from purely negative sub-expressions.");
}
combinationInfoAdd(ckey, id, ekey, lkey_start, lkey_result,
min_offset, max_offset);
}