44 lines
991 B
C
44 lines
991 B
C
#ifndef _CHUNK_H
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#define _CHUNK_H
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#include "common.h"
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#include "value.h"
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// max 256 opcodes
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typedef enum {
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OP_CONSTANT, OP_CONSTANT_LONG,
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OP_ADD, OP_SUBTRACT,
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OP_MULTIPLY, OP_DIVIDE,
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OP_NEGATE,
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OP_RETURN,
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NUM_OP, // total number of valid opcodes
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} OpCode;
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typedef struct {
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int count;
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int capacity;
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bool bDebug; // if line numbers are kept or not
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uint8_t* code;
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uint16_t* lines; // 16bit line numbers
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ValueArray constants;
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} Chunk;
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void initChunk( Chunk* chunk );
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void freeChunk( Chunk* chunk );
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// write single byte to code memory
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void writeChunk( Chunk* chunk, uint8_t byte, uint16_t line );
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// u16 write / read
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void writeChunk16( Chunk* chunk, uint16_t word, uint16_t line );
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uint16_t readChunk16( Chunk* chunk, int offset );
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// add constant val to chunk's array. return index where it was added
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uint16_t addConstant( Chunk* chunk, Value val );
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// high level for adding and writing chunk constants
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void writeConstant( Chunk* chunk, Value val, uint16_t line );
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#endif
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