ZE-Standard-Libraries/stack/stack.c

<EFBFBD><EFBFBD>#include "stack.h"

Stack *initStack(void) {
	Stack *p_stack = (Stack *)malloc(sizeof(Stack));
	p_stack->id = getId();
	p_stack->length = 0;
	p_stack->top = NULL;
	return p_stack;
}

SNode *initSNode(void) {
	SNode *p_snode = (SNode *)malloc(sizeof(SNode));
	p_snode->id = getId();
	p_snode->if_malloc = 0;
	p_snode->next = NULL;
	p_snode->value = NULL;
	return p_snode;
}

SNode *popStack(Stack *p_stack) {
	if (p_stack->top != NULL) {
		SNode *p_snode = p_stack->top;
		p_stack->top = p_snode->next;
		p_snode->next = NULL;
		p_stack->length -= 1;
		return p_snode;
	}
	else return NULL;
}

int pushStack(Stack *p_stack, SNode *p_snode) {
	SNode *pn_snode = p_stack->top;
	p_stack->top = p_snode;
	p_snode->next = pn_snode;
	p_stack->length -= 1;
	return 0;
}

int releaseStack(Stack *p_stack) {
	SNode *p_sndoe = p_stack->top;
	while (p_sndoe != NULL) {
		SNode *pl_snode = p_sndoe;
		p_sndoe = p_sndoe->next;
		releaseSNode(pl_snode);
	}
	p_stack->id = 0;
	p_stack->top = NULL;
	p_stack->length = 0;
	free(p_stack);
	return 0;
}

int releaseSNode(SNode *p_snode) {
	p_snode->id = 0;
	free(p_snode->value);
	p_snode->if_malloc = 0;
	p_snode->value = NULL;
	p_snode->type = NULL;
	free(p_snode);
	return 0;
}

int initMallocValueForSNode(SNode *p_snode, const char *type, void *value) {
	p_snode->if_malloc = 1;
	p_snode->type = type;
	p_snode->value = value;
	return  0;
}