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48 lines
1.3 KiB
48 lines
1.3 KiB
use nom::IResult;
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use nom::multi::count;
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use nom::number::complete::*;
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use nom::sequence::tuple;
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use crate::formats::common::take_cstring_from;
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#[derive(Debug)]
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pub struct DatHeader {
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pub unk00: u32,
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pub num_files: u32,
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}
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fn parse_header(i: &[u8]) -> IResult<&[u8], DatHeader> {
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let (i, (unk00, num_files)) = tuple((le_u32, le_u32))(i)?;
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Ok((i, DatHeader { unk00, num_files }))
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}
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#[derive(Debug)]
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pub struct DatFileEntry {
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pub name: String,
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pub size: u32,
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pub padded_size: u32,
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pub ofs_data: u32,
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}
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fn parse_file_entry(i: &[u8]) -> IResult<&[u8], DatFileEntry> {
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let (i, name) = take_cstring_from(i, 0x34)?;
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let name = String::from_utf8_lossy(name).to_string();
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let (i, (size, padded_size, ofs_data)) = tuple((le_u32, le_u32, le_u32))(i)?;
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Ok((i, DatFileEntry { name, size, padded_size, ofs_data }))
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}
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#[derive(Debug)]
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pub struct Dat {
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pub header: DatHeader,
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pub files: Vec<DatFileEntry>,
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}
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/// Parse a DAT archive, returning it with its full file data.
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pub fn parse(i: &[u8]) -> IResult<&[u8], Dat> {
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let full_file = i;
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let (_, header) = parse_header(i)?;
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let i = &full_file[0x40..];
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let (_, files) = count(parse_file_entry, header.num_files as usize)(i)?;
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Ok((full_file, Dat { header, files }))
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}
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