package asm

import "fmt"

import "gopkg.in/yaml.v2"

type program struct {
	GlobalMemorySize   uint64     `yaml:"global_memory_size"`
	FunctionMemorySize uint64     `yaml:"function_memory_size"`
	Functions          []function `yaml:"functions"`
}

type function []instruction

type instruction []string

func parse(src []byte) (*program, error) {
	prog := &program{}

	err := yaml.UnmarshalStrict(src, &prog)
	if err != nil {
		return nil, err
	}

	if prog.GlobalMemorySize == 0 {
		return nil, fmt.Errorf("global_memory_size must be set and non-zero")
	}

	if prog.FunctionMemorySize == 0 {
		return nil, fmt.Errorf("function_memory_size must be set and non-zero")
	}

	return prog, nil
}