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sysprog21
pitifulvm
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#pragma once
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "type.h"
/* stack frame type*/
typedef enum {
STACK_ENTRY_NONE,
STACK_ENTRY_BYTE,
STACK_ENTRY_SHORT,
STACK_ENTRY_INT,
STACK_ENTRY_LONG,
STACK_ENTRY_REF,
STACK_ENTRY_DOUBLE,
STACK_ENTRY_FLOAT
} stack_entry_type_t;
typedef struct {
value_t entry;
stack_entry_type_t type;
} stack_entry_t;
typedef struct {
int max_size;
int size;
stack_entry_t *store;
} stack_frame_t;
typedef stack_entry_t local_variable_t;
void init_stack(stack_frame_t *stack, size_t entry_size);
void push_byte(stack_frame_t *stack, int8_t value);
void push_short(stack_frame_t *stack, int16_t value);
void push_int(stack_frame_t *stack, int32_t value);
void push_long(stack_frame_t *stack, int64_t value);
void push_ref(stack_frame_t *stack, void *addr);
int64_t pop_int(stack_frame_t *stack);
void *pop_ref(stack_frame_t *stack);
void pop_to_local(stack_frame_t *stack, local_variable_t *locals);
size_t get_type_size(stack_entry_type_t type);
int64_t stack_to_int(value_t *entry, size_t size);
stack_entry_t top(stack_frame_t *stack);
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