codegen.h

#ifndef CODEGEN_H
#define CODEGEN_H

#include "ast.h"
#include "symtab.h"
#include <stdio.h>

/* Code generator context */
typedef struct {
  FILE *output;
  SymbolTable *symtab;
  int64_t current_line;
  int64_t temp_base; /* Base address for reserved temporaries */
  int64_t temp_top;  /* Stack pointer for nested temporaries */
} CodeGen;

/* Initialize/finalize code generator */
CodeGen *codegen_create(FILE *output, SymbolTable *symtab);
void codegen_destroy(CodeGen *gen);

/* Generate code for entire program */
void codegen_program(CodeGen *gen, ASTNode *root);

/* Emit single instruction */
void emit(CodeGen *gen, const char *fmt, ...);

/* Get current instruction address */
int64_t codegen_current_addr(CodeGen *gen);

/* Patch jump address */
void codegen_patch(CodeGen *gen, int64_t addr, int64_t target);

#endif /* CODEGEN_H */