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276 lines
9.7 KiB
276 lines
9.7 KiB
use std::fmt::{self, Debug};
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use nom::IResult;
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use nom::bytes::complete::take;
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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::parsers::common::{sjis_to_string, take_cstring, take_cstring_from, VarSizeInt};
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use crate::parsers::paramdef;
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use crate::utils::bin::{has_flag, mask};
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const FLAGS2D_UNK1: u8 = 0b00000001;
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const FLAGS2D_32B_OFS_DATA: u8 = 0b00000010;
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const FLAGS2D_64B_OFS_DATA: u8 = 0b00000100;
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const FLAGS2D_OFS_STRING: u8 = 0b10000000;
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const FLAGS2E_UNICODE_NAMES: u8 = 0b00000001;
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#[derive(Debug)]
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pub struct ParamHeader {
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pub ofs_strings: u32, // Unreliable.
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pub ofs_data: u16,
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pub unk06: u16,
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pub paramdef_data_version: u16,
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pub num_rows: u16,
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pub param_type: String,
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pub ofs_name: Option<u64>,
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pub endianness: u8,
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pub flags2D: u8,
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pub flags2E: u8,
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pub paramdef_format_version: u8,
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pub ofs_data_long: Option<VarSizeInt>,
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}
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impl ParamHeader {
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pub fn use_be(&self) -> bool { use_be(self.endianness) }
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pub fn has_ofs_string_name(&self) -> bool { has_ofs_string_name(self.flags2D) }
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pub fn has_u32_ofs_data(&self) -> bool { has_u32_ofs_data(self.flags2D) }
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pub fn has_u64_ofs_data(&self) -> bool { has_u64_ofs_data(self.flags2D) }
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}
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fn use_be(endianness: u8) -> bool { endianness == 0xFF }
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fn has_ofs_string_name(flags: u8) -> bool { has_flag(flags, FLAGS2D_OFS_STRING) }
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fn has_u32_ofs_data(flags: u8) -> bool { has_flag(flags, FLAGS2D_UNK1 | FLAGS2D_32B_OFS_DATA) }
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fn has_u64_ofs_data(flags: u8) -> bool { has_flag(flags, FLAGS2D_64B_OFS_DATA) }
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fn parse_header(i: &[u8]) -> IResult<&[u8], ParamHeader> {
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let endianness = i[0x2C];
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let p_u16 = if use_be(endianness) { be_u16 } else { le_u16 };
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let p_u32 = if use_be(endianness) { be_u32 } else { le_u32 };
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let p_u64 = if use_be(endianness) { be_u64 } else { le_u64 };
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let flags2D = i[0x2D];
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let use_u32_ofs_data = has_u32_ofs_data(flags2D);
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let use_u64_ofs_data = has_u64_ofs_data(flags2D);
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let (i, (ofs_strings, ofs_data, unk06, paramdef_data_version, num_rows)) =
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tuple((p_u32, p_u16, p_u16, p_u16, p_u16))(i)?;
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let (i, param_type, ofs_name) = if has_ofs_string_name(flags2D) {
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// Name is in the strings block, parse it later.
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let (i, (_, ofs_name, _)) = tuple((take(0x4usize), p_u64, take(0x14usize)))(i)?;
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(i, String::new(), Some(ofs_name))
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} else {
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let (i, name) = take_cstring_from(i, 0x20)?;
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(i, String::from_utf8_lossy(name).to_string(), None)
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};
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let i = &i[0x2..]; // Skip endianness and flags2D.
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let (i, (flags2E, paramdef_format_version)) = tuple((le_u8, le_u8))(i)?;
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let (i, ofs_data_long) = if use_u32_ofs_data {
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let (_, o) = p_u32(i)?;
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(&i[0x20..], Some(VarSizeInt { vu32: o }))
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} else if use_u64_ofs_data {
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let (_, o) = p_u64(i)?;
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(&i[0x20..], Some(VarSizeInt { vu64: o }))
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} else {
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(i, None)
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};
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Ok((
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i,
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ParamHeader {
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ofs_strings,
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ofs_data,
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unk06,
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paramdef_data_version,
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num_rows,
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param_type,
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ofs_name,
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endianness,
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flags2D,
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flags2E,
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paramdef_format_version,
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ofs_data_long,
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}
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))
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}
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#[derive(Debug)]
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pub struct ParamRow {
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pub id: u32,
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pub ofs_data: VarSizeInt,
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pub ofs_name: VarSizeInt,
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pub name: Option<String>,
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pub data: Vec<ParamRowValue>,
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}
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#[derive(strum_macros::IntoStaticStr)]
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pub enum ParamRowValue {
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S8(i8), U8(u8), S16(i16), U16(u16), S32(i32), U32(u32), F32(f32), UNK(Vec<u8>)
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}
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impl fmt::Debug for ParamRowValue {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let name: &str = self.into();
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write!(f, "{}: {}", name, self)
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}
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}
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// Could be probably be done better with a macro...
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impl fmt::Display for ParamRowValue {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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ParamRowValue::S8(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::U8(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::S16(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::U16(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::S32(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::U32(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::F32(i) => fmt::Display::fmt(&i, f),
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ParamRowValue::UNK(i) => fmt::Debug::fmt(&i, f),
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}
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}
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}
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fn parse_row<'a>(i: &'a[u8], header: &ParamHeader) -> IResult<&'a[u8], ParamRow> {
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let p_u32 = if header.use_be() { be_u32 } else { le_u32 };
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let p_u64 = if header.use_be() { be_u64 } else { le_u64 };
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let (i, (id, ofs_data, ofs_name)) = if header.has_u64_ofs_data() {
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let (i, (id, _, ofs_data, ofs_name)) = tuple((p_u32, take(4usize), p_u64, p_u64))(i)?;
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(i, (id, VarSizeInt { vu64: ofs_data }, VarSizeInt { vu64: ofs_name }))
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} else {
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let (i, (id, ofs_data, ofs_name)) = tuple((p_u32, p_u32, p_u32))(i)?;
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(i, (id, VarSizeInt { vu32: ofs_data }, VarSizeInt { vu32: ofs_name }))
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};
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Ok((i, ParamRow { id, ofs_data, ofs_name, name: None, data: vec!() }))
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}
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fn parse_row_data<'a>(
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i: &'a[u8],
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header: &ParamHeader,
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paramdef: ¶mdef::Paramdef
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) -> IResult<&'a[u8], Vec<ParamRowValue>> {
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let use_be = header.use_be();
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let mut data = vec!();
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let mut bitfield = 0u16; // Current bitfield being parsed. u16 is largest handled type.
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let mut remaining_bits = 0; // Remaining bits in bitfield.
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let mut data_slice = i;
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for field in ¶mdef.fields {
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let bit_size = field.bit_size();
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let value = if bit_size == 0 {
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let (rest, value) = parse_row_value(data_slice, &field.display_type,
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field.byte_count as usize, use_be)?;
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data_slice = rest;
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remaining_bits = 0;
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value
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} else {
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// Bitfield parsing. If it's the first bitfield in a series, get the containing bytes
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// in the bitfield var.
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if remaining_bits == 0 {
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let (rest, bf) = take(field.byte_count as usize)(data_slice)?;
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bitfield = match field.display_type.as_str() {
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"u8" => { remaining_bits = 8; le_u8(bf).map(|(_, v)| v as u16)? }
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"dummy8" => { remaining_bits = 8; le_u8(bf).map(|(_, v)| v as u16)? }
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"u16" => {
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remaining_bits = 16;
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(if use_be { be_u16 } else { le_u16 }) (bf) .map(|(_, v)| v)?
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}
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e => panic!("Unhandled PARAMDEF type {}", e),
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};
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data_slice = rest;
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}
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// Parse masked bits.
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let value = bitfield & mask(bit_size as usize) as u16;
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// Shift bitfield so next values can be parsed directly with a bitmask.
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bitfield >>= bit_size;
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remaining_bits -= bit_size;
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match field.display_type.as_str() {
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"u8" => ParamRowValue::U8(value as u8),
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"dummy8" => ParamRowValue::U8(value as u8),
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"u16" => ParamRowValue::U16(value),
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e => panic!("Unhandled PARAMDEF type {}", e),
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}
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};
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data.push(value);
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}
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Ok((i, data))
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}
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fn parse_row_value<'a>(
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i: &'a[u8],
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type_str: &str,
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num_bytes: usize,
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use_be: bool
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) -> IResult<&'a[u8], ParamRowValue> {
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Ok(match type_str {
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"s8" => le_i8(i)
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.map(|(i, v)| (i, ParamRowValue::S8(v)))?,
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"u8" => le_u8(i)
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.map(|(i, v)| (i, ParamRowValue::U8(v)))?,
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"s16" => (if use_be { be_i16 } else { le_i16 }) (i)
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.map(|(i, v)| (i, ParamRowValue::S16(v)))?,
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"u16" => (if use_be { be_u16 } else { le_u16 }) (i)
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.map(|(i, v)| (i, ParamRowValue::U16(v)))?,
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"s32" => (if use_be { be_i32 } else { le_i32 }) (i)
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.map(|(i, v)| (i, ParamRowValue::S32(v)))?,
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"u32" => (if use_be { be_u32 } else { le_u32 }) (i)
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.map(|(i, v)| (i, ParamRowValue::U32(v)))?,
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"f32" => (if use_be { be_f32 } else { le_f32 }) (i)
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.map(|(i, v)| (i, ParamRowValue::F32(v)))?,
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_ => take(num_bytes)(i)
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.map(|(i, v)| (i, ParamRowValue::UNK(v.to_vec())))?,
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})
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}
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#[derive(Debug)]
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pub struct Param {
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pub header: ParamHeader,
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pub rows: Vec<ParamRow>,
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}
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pub fn parse<'a>(i: &'a[u8], paramdef: Option<¶mdef::Paramdef>) -> IResult<&'a[u8], Param> {
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let full_file = i;
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let (i, mut header) = parse_header(i)?;
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if header.has_ofs_string_name() && header.ofs_name.is_some() {
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let ofs_name = header.ofs_name.unwrap() as usize;
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let (_, name) = take_cstring(&full_file[ofs_name..])?;
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header.param_type.push_str(&String::from_utf8_lossy(name).to_string());
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}
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let (i, mut rows) = count(|i| parse_row(i, &header), header.num_rows as usize)(i)?;
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for row in &mut rows {
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let ofs_name = row.ofs_name.u64_if(header.has_u64_ofs_data()) as usize;
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if ofs_name != 0 {
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let (_, name) = take_cstring(&full_file[ofs_name..])?;
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row.name = sjis_to_string(name).or_else(|| {
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eprintln!("Can't parse row name: {:?}", name);
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None
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});
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}
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}
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if paramdef.is_some() {
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let def = paramdef.unwrap();
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let row_size = def.row_size();
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for row in &mut rows {
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let ofs_data = row.ofs_data.u64_if(header.has_u64_ofs_data()) as usize;
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if ofs_data == 0 {
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continue
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}
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let ofs_data_end = ofs_data + row_size;
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let (_, data) = parse_row_data(&full_file[ofs_data..ofs_data_end], &header, &def)?;
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row.data = data;
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}
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}
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Ok((i, Param { header, rows }))
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}
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