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chunk.c
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chunk.c
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#include <stdlib.h>
#include "chunk.h"
#include "memory.h"
#include "value.h"
void initChunk(Chunk *chunk) {
chunk->count = 0;
chunk->capacity = 0;
chunk->code = NULL;
chunk->lines = NULL;
initValueArray(&chunk->constants);
}
void writeChunk(Chunk *chunk, uint8_t byte, int line) {
if (chunk->capacity < chunk->count + 1) {
int oldCapacity = chunk->capacity;
chunk->capacity = GROW_CAPACITY(oldCapacity, 8);
chunk->code =
GROW_ARRAY(chunk->code, uint8_t, oldCapacity, chunk->capacity);
chunk->lines = GROW_ARRAY(chunk->lines, int, oldCapacity, chunk->capacity);
}
chunk->code[chunk->count] = byte;
chunk->lines[line]++;
chunk->count++;
}
int addConstant(Chunk *chunk, Value value) {
writeValueArray(&chunk->constants, value);
return chunk->constants.count - 1;
}
void freeChunk(Chunk *chunk) {
FREE_ARRAY(uint8_t, chunk->code, chunk->capacity);
FREE_ARRAY(int, chunk->lines, chunk->capacity);
freeValueArray(&chunk->constants);
initChunk(chunk);
}
int getLine(Chunk *chunk, int offset) {
/*
for each line slot
if current offset == offset
it's our line.
else
increment current offset by slot's data
*/
if (offset <= 0) // handle initial instruction.
return offset + 1;
int cur_offset = 0;
int line = 1; /*lines start from 1*/
for (int i = line; i <= chunk->count; i++) {
if (cur_offset == offset) {
line = i;
break;
}
cur_offset += chunk->lines[i];
}
return line;
}