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#include "sloth.h"
#include <stdio.h>
#include <stdlib.h>
void sloth_deinit(Sloth *ctx)
{
if (ctx->stack != NULL) {
free(ctx->stack);
ctx->stack = NULL;
}
}
SlothError sloth_pop(Sloth *ctx, SlothByte *v)
{
if (ctx->stack_size == 0)
return "sloth_pull: stack is empty";
*v = ctx->stack[ctx->stack_size - 1];
ctx->stack_size -= 1;
return NULL;
}
SlothError sloth_push(Sloth *ctx, SlothByte v)
{
if (ctx->stack == NULL) {
ctx->stack = malloc(sizeof(SlothByte) * 16);
if (ctx->stack == NULL)
return "sloth_push: calloc failed";
ctx->stack_capacity = 16;
} else if (ctx->stack_size == ctx->stack_capacity) {
SlothByte *const new_stack =
realloc(ctx->stack, ctx->stack_capacity * 2);
if (new_stack == NULL)
return "sloth_push: realloc failed";
ctx->stack_capacity *= 2;
}
ctx->stack[ctx->stack_size] = v;
ctx->stack_size += 1;
return NULL;
}
void sloth_inspect_stack(const Sloth *ctx)
{
printf("<%lu> ", ctx->stack_size);
for (size_t i = 0; i < ctx->stack_size; i++)
printf("%d ", ctx->stack[i]);
}
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