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#ifndef BDL_CHUNK_H
#define BDL_CHUNK_H
#include "objects.h"
#include "darray.h"
typedef struct LineInfo {
size_t line;
size_t col;
} LineInfo;
typedef struct Chunk {
u8 *code;
Object *constants;
LineInfo *lines;
} Chunk;
Chunk * chunk_init(void);
void add_code(Chunk *chunk, u8 byte, size_t line, size_t col);
size_t add_constant(Chunk *chunk, Object obj);
void chunk_free(Chunk *chunk);
Chunk *
chunk_init(void) {
Chunk *chunk = malloc(sizeof(Chunk));
array_init(chunk->code, 0);
array_init(chunk->constants, 0);
array_init(chunk->lines, 0);
return chunk;
}
void
chunk_free(Chunk *chunk) {
array_free(chunk->code);
array_free(chunk->constants);
array_free(chunk->lines);
free(chunk);
}
void
add_code(Chunk *chunk, u8 byte, size_t line, size_t col) {
array_push(chunk->code, byte);
LineInfo info = (LineInfo){line, col};
array_push(chunk->lines, info);
}
size_t
add_constant(Chunk *chunk, Object obj) {
// FIXME?: Since we are using a single byte to store constant indices, we
// can only have 256 stored constants. If we need more we may need to add
// another instruction OP_CONSTANT_16 to have at least two bytes for
// constants. Alternatively, we could make that the default. Either way, for
// now it's fine.
size_t pos = array_size(chunk->constants);
array_push(chunk->constants, obj);
return pos;
}
#endif // BDL_CHUNK_H
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