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fix the unary not (logical not) handling for issue #5, add tests

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This commit is contained in:
Joseph Poirier 2015-06-14 17:54:48 -05:00
parent 63cd9d074b
commit e780f43222
3 changed files with 42 additions and 5 deletions
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12
expression.c
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@ -761,23 +761,25 @@ void ExpressionPrefixOperator(struct ParseState *Parser,
ProgramFail(Parser, "can't assign to this");
switch (Op) {
case TokenIncrement:
TopValue->Val->Pointer =
ResultPtr = TopValue->Val->Pointer =
(void*)((char*)TopValue->Val->Pointer+Size);
break;
case TokenDecrement:
TopValue->Val->Pointer =
ResultPtr = TopValue->Val->Pointer =
(void*)((char*)TopValue->Val->Pointer-Size);
break;
case TokenUnaryNot:
/* conditionally checking a pointer's value */
/* conditionally checking a pointer's value, we only want
to change the stack value (ResultPtr) and not the pointer's
actual value */
TopValue->Val->Pointer =
(void*)((TopValue->Val->Pointer) ? NULL : (void*)1);
(void*)((char*)TopValue->Val->Pointer);
ResultPtr = TopValue->Val->Pointer ? NULL : (void*)0x01;
break;
default:
ProgramFail(Parser, "invalid operation");
break;
}
ResultPtr = TopValue->Val->Pointer;
StackValue = ExpressionStackPushValueByType(Parser, StackTop,
TopValue->Typ);
StackValue->Val->Pointer = ResultPtr;

19
tests/08_while.c
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@ -3,6 +3,7 @@
int a;
int p;
int t;
int *pp;
a = 1;
p = 0;
@ -16,4 +17,22 @@ while (a < 100)
p = t;
}
a = 0;
pp = NULL;
while (!pp) {
printf("%d\n", a);
a += 1;
if (a == 8)
pp = &a;
}
p = 10;
pp = &p;
while (pp) {
printf("%d\n", p);
p -= 1;
if (p == 2)
pp = NULL;
}
void main() {}

16
tests/08_while.expect
View file

@ -9,3 +9,19 @@
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