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Stack overflow errors get detected correctly

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nplk84 2023-10-16 11:56:38 +02:00
parent 655da552de
commit 7d7b67f7f2
1 changed files with 5 additions and 3 deletions
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8
njvm.c
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@ -20,11 +20,13 @@
unsigned int programmSpeicher[1000]; unsigned int programmSpeicher[1000];
// Stack // Stack
unsigned int stack[1000]; #define maxValues 1000
unsigned int stack[maxValues];
unsigned int current = 0; unsigned int current = 0;
void stackPush(unsigned int value) { void stackPush(unsigned int value) {
if (current > 100) { if (current > (maxValues-1)) {
fprintf(stderr, "stack overflow\n"); fprintf(stderr, "stack overflow\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
@ -37,7 +39,7 @@ unsigned int stackPop(void) {
fprintf(stderr, "stack underflow\n"); fprintf(stderr, "stack underflow\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
return --current; return stack[--current];
} }
void version(void) { void version(void) {