libgm 0.5.0

A tool for modding, unpacking and decompiling GameMaker games
Documentation 
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use std::ops::Deref;
use std::ops::DerefMut;

use crate::prelude::*;
use crate::util::init::vec_with_capacity;
use crate::wad::chunk::ChunkName;
use crate::wad::deserialize::reader::DataReader;
use crate::wad::elements::GMChunk;
use crate::wad::elements::GMElement;
use crate::wad::serialize::builder::DataBuilder;

#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub struct GMLanguageInfo {
    pub unknown1: u32,
    pub languages: Vec<GMLanguageData>,
    pub entry_ids: Vec<String>,
    pub exists: bool,
}

impl Deref for GMLanguageInfo {
    type Target = Vec<GMLanguageData>;

    fn deref(&self) -> &Self::Target {
        &self.languages
    }
}

impl DerefMut for GMLanguageInfo {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.languages
    }
}

impl GMChunk for GMLanguageInfo {
    const NAME: ChunkName = ChunkName::new("LANG");

    fn exists(&self) -> bool {
        self.exists
    }
}

impl GMElement for GMLanguageInfo {
    fn deserialize(reader: &mut DataReader) -> Result<Self> {
        let unknown1 = reader.read_u32()?;
        let language_count = reader.read_u32()?;
        let entry_count = reader.read_u32()?;

        let mut entry_ids: Vec<String> = vec_with_capacity(entry_count)?;
        for _ in 0..entry_count {
            entry_ids.push(reader.read_gm_string()?);
        }

        let mut languages: Vec<GMLanguageData> = vec_with_capacity(language_count)?;
        for _ in 0..language_count {
            let name: String = reader.read_gm_string()?;
            let region: String = reader.read_gm_string()?;
            let mut entries: Vec<String> = Vec::with_capacity(entry_count as usize);
            for _ in 0..entry_count {
                entries.push(reader.read_gm_string()?);
            }
            languages.push(GMLanguageData { name, region, entries });
        }

        Ok(Self {
            unknown1,
            languages,
            entry_ids,
            exists: true,
        })
    }

    fn serialize(&self, builder: &mut DataBuilder) -> Result<()> {
        builder.write_u32(self.unknown1);
        builder.write_usize(self.languages.len())?;
        builder.write_usize(self.entry_ids.len())?;
        for entry in &self.entry_ids {
            builder.write_gm_string(entry);
        }
        for language in &self.languages {
            builder.write_gm_string(&language.name);
            builder.write_gm_string(&language.region);
            for entry in &language.entries {
                builder.write_gm_string(entry);
            }
        }
        Ok(())
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct GMLanguageData {
    pub name: String,
    pub region: String,
    pub entries: Vec<String>,
}