debug.c

#include <stdio.h>

#include "chunk.h"
#include "debug.h"
#include "value.h"

void disassembleChunk(Chunk *chunk, const char *name){
    printf("== %s ==\n",name);
    for(int offset = 0;offset < chunk->count;){
        offset = disassembleInstruction(chunk, offset);
    }
}

static int simpleInstruction(const char* name, int offset){
    printf("%s\n",name);
    return offset+1;
}

static int constantInstruction(const char* name, Chunk* chunk,
                               int offset) {
  uint8_t constant = chunk->code[offset + 1];
  printf("%-16s %4d '", name, constant);
  printValue(chunk->constants.values[constant]);
  printf("'\n");
  return offset + 2;
}

int disassembleInstruction(Chunk *chunk, int offset){
    printf("%04d",offset);
    if (offset > 0 && chunk->lines[offset] == chunk->lines[offset - 1]) {
        printf("   | ");
    } else {
        printf("%4d ", chunk->lines[offset]);
    }
    uint8_t instruction = chunk->code[offset];
    switch (instruction){
        case OP_RETURN:
            return simpleInstruction("OP_RETURN ",offset);
        case OP_CONSTANT:
            return constantInstruction("OP_CONSTANT", chunk, offset);
        case OP_NEGATE:
            return simpleInstruction("OP_NEGATE", offset);
        case OP_ADD:
            return simpleInstruction("OP_ADD", offset);
        case OP_SUBTRACT:
            return simpleInstruction("OP_SUBTRACT", offset);
        case OP_MULTIPLY:
            return simpleInstruction("OP_MULTIPLY", offset);
        case OP_DIVIDE:
            return simpleInstruction("OP_DIVIDE", offset);
        default:
            printf("Unknown opcode %d\n",instruction);
            return offset+1;
    }
}