criware-utf

Implementation of the UTF table format used in CRIWARE CPK files.

This crate primarily offers the utf_table macro, which automatically creates a table read and write procedure based on a schema provided as a struct definition (see the Table trait for more info on what is provided, and the macro itself for info on how to write the schema).

#[utf_table]
struct Table {
    #[column_name = "ColumnName"]
    #[rowed]
    rowed_value: i64,
    #[constant]
    constant_value: String,
    #[optional]
    #[rowed]
    rowed_optional_value: i8,
}

The Schema type (unrelated to utf_table) allows for retrieving the structure of a table without its contents. This can be useful for debugging, or any situation where a table may be one of many possible schemas (see example).

The Packet type mimics the method in which the primary tables in a CPK file are stored. Encryption and decryption are handled automatically.

The Reader and Writer types are also available for use in custom read/write procedures, but they are, in their current state, highly specialized for the utf_table macro, so using them is not recommended.

Examples

This section demonstrates important features this crate provides. Each example can be dropped in to a project and compile (and run if you had the necessary table files).

All of these examples demonstrate high-level functionality. For more precise examples and explanations, consult the page for the relevant type/macro.

Example: Basic table read/write

use criware_utf::{Table, utf_table};

#[utf_table]
struct ImportantTable {
    #[column_name = "ID"]
    id: i64,
    file_name: String,
    #[constant]
    comment: String,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut orig = std::fs::File::open("important-table.bin")?;
    let mut new = std::fs::File::create("more-important-table.bin")?;
    let mut table = ImportantTable::read(&mut orig)?;
    for row in &table.rows {
        println!("\"{}\" (id {})", row.file_name, row.id);
    }
    table.constants.comment = format!("\"{}\" -loser", table.constants.comment);
    table.write(&mut new)?;
    Ok(())
}

Example: Reading one of many schemas

use std::io::{Seek, SeekFrom};

use criware_utf::{Schema, Table, utf_table};

#[utf_table(table_name = "CoolTable")]
struct CoolTableV1 {
    id: i64,
    name: String,
}

#[utf_table(table_name = "CoolTable")]
struct CoolTableV2 {
    id: i64,
    name: String,
    #[column_name = "Crc32"]
    crc: u32,
}

enum CoolTable {
    V1(CoolTableV1),
    V2(CoolTableV2),
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut file = std::fs::File::open("table.bin")?;
    let schema = Schema::read(&mut file)?;
    let table = {
        file.seek(SeekFrom::Start(0))?;
        if schema.has_column("Crc32") {
            CoolTable::V2(CoolTableV2::read(&mut file)?)
        } else {
            CoolTable::V1(CoolTableV1::read(&mut file)?)
        }
    };
    // ... do something ...
    Ok(())
}

License

This project is open source and available under the terms of the GNU General Public License v3.0.