47 lines
1.1 KiB
C
Executable File
47 lines
1.1 KiB
C
Executable File
//
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// Created by Nils on 29.10.2023.
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//
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#ifndef STACK
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#define STACK
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#define SIZE 1000
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#include <stdio.h>
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#include <stdlib.h>
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struct stackFrame {
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unsigned int *fp; // Frame pointer
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unsigned int *sp; // Stack pointer
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unsigned int *bp; // Base pointer
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};
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struct stack {
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int size;
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int currentFrame;
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struct stackFrame *frames[SIZE];
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};
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void printStack(struct stack *stack) {
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printf("Stack:\n");
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for (int i = 0; i < stack->size; ++i) {
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printf("[%d] = %d\n", i, stack->frames[stack->currentFrame]->sp[i]);
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}
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}
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void push(struct stack *stack, int value) {
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struct stackFrame *currentFrame = stack->frames[stack->currentFrame];
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*currentFrame->sp++ = value;
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}
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int pop(struct stack *stack) {
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struct stackFrame *currentFrame = stack->frames[stack->currentFrame];
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return *--currentFrame->sp;
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}
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int peek(struct stack *stack, int steps) { // peek is pop without removing the value
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struct stackFrame *currentFrame = stack->frames[stack->currentFrame];
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return *(currentFrame->sp - steps);
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}
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#endif
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