187 lines
7.7 KiB
Rust
187 lines
7.7 KiB
Rust
use std::io::Cursor;
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use num_traits::FromPrimitive;
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use crate::framework::error::GameError::InvalidValue;
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use crate::framework::error::GameResult;
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use crate::scripting::tsc::bytecode_utils::read_cur_varint;
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use crate::scripting::tsc::opcodes::OpCode;
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use crate::scripting::tsc::text_script::TextScript;
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impl TextScript {
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pub fn decompile_event(&self, id: u16) -> GameResult<String> {
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if let Some(bytecode) = self.event_map.get(&id) {
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let mut result = String::new();
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let mut cursor = Cursor::new(bytecode);
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while let Ok(op_num) = read_cur_varint(&mut cursor) {
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let op_maybe: Option<OpCode> = FromPrimitive::from_i32(op_num);
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if let Some(op) = op_maybe {
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match op {
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// Zero operand codes
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OpCode::AEp
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| OpCode::CAT
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| OpCode::CIL
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| OpCode::CLO
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| OpCode::CLR
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| OpCode::CPS
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| OpCode::CRE
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| OpCode::CSS
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| OpCode::END
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| OpCode::ESC
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| OpCode::FLA
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| OpCode::FMU
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| OpCode::FRE
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| OpCode::HMC
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| OpCode::INI
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| OpCode::KEY
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| OpCode::LDP
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| OpCode::MLP
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| OpCode::MM0
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| OpCode::MNA
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| OpCode::MS2
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| OpCode::MS3
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| OpCode::MSG
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| OpCode::NOD
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| OpCode::PRI
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| OpCode::RMU
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| OpCode::SAT
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| OpCode::SLP
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| OpCode::SMC
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| OpCode::SPS
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| OpCode::STC
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| OpCode::SVP
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| OpCode::TUR
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| OpCode::WAS
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| OpCode::ZAM
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| OpCode::HM2
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| OpCode::POP
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| OpCode::KE2
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| OpCode::FR2 => {
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result.push_str(format!("{:?}()\n", op).as_str());
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}
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// One operand codes
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OpCode::BOA
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| OpCode::BSL
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| OpCode::FOB
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| OpCode::FOM
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| OpCode::QUA
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| OpCode::UNI
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| OpCode::MYB
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| OpCode::MYD
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| OpCode::FAI
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| OpCode::FAO
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| OpCode::WAI
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| OpCode::FAC
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| OpCode::GIT
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| OpCode::NUM
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| OpCode::DNA
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| OpCode::DNP
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| OpCode::FLm
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| OpCode::FLp
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| OpCode::MPp
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| OpCode::SKm
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| OpCode::SKp
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| OpCode::EQp
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| OpCode::EQm
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| OpCode::MLp
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| OpCode::ITp
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| OpCode::ITm
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| OpCode::AMm
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| OpCode::UNJ
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| OpCode::MPJ
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| OpCode::YNJ
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| OpCode::EVE
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| OpCode::XX1
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| OpCode::SIL
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| OpCode::LIp
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| OpCode::SOU
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| OpCode::CMU
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| OpCode::SSS
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| OpCode::ACH
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| OpCode::S2MV
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| OpCode::S2PJ
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| OpCode::PSH => {
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let par_a = read_cur_varint(&mut cursor)?;
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result.push_str(format!("{:?}({})\n", op, par_a).as_str());
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}
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// Two operand codes
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OpCode::FON
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| OpCode::MOV
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| OpCode::AMp
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| OpCode::NCJ
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| OpCode::ECJ
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| OpCode::FLJ
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| OpCode::ITJ
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| OpCode::SKJ
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| OpCode::AMJ
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| OpCode::SMP
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| OpCode::PSp
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| OpCode::IpN
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| OpCode::FFm => {
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let par_a = read_cur_varint(&mut cursor)?;
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let par_b = read_cur_varint(&mut cursor)?;
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result.push_str(format!("{:?}({}, {})\n", op, par_a, par_b).as_str());
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}
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// Three operand codes
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OpCode::ANP | OpCode::CNP | OpCode::INP | OpCode::TAM | OpCode::CMP | OpCode::INJ => {
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let par_a = read_cur_varint(&mut cursor)?;
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let par_b = read_cur_varint(&mut cursor)?;
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let par_c = read_cur_varint(&mut cursor)?;
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result.push_str(format!("{:?}({}, {}, {})\n", op, par_a, par_b, par_c).as_str());
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}
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// Four operand codes
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OpCode::TRA | OpCode::MNP | OpCode::SNP => {
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let par_a = read_cur_varint(&mut cursor)?;
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let par_b = read_cur_varint(&mut cursor)?;
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let par_c = read_cur_varint(&mut cursor)?;
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let par_d = read_cur_varint(&mut cursor)?;
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result.push_str(format!("{:?}({}, {}, {}, {})\n", op, par_a, par_b, par_c, par_d).as_str());
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}
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OpCode::_STR => {
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let len = read_cur_varint(&mut cursor)?;
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result.push_str(format!("%string(len = {}, value = \"", len).as_str());
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for _ in 0..len {
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let chr = std::char::from_u32(read_cur_varint(&mut cursor)? as u32).unwrap_or('?');
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match chr {
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'\n' => {
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result.push_str("\\n");
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}
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'\r' => {
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result.push_str("\\r");
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}
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'\t' => {
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result.push_str("\\t");
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}
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'\u{0000}'..='\u{001f}' | '\u{0080}'..='\u{ffff}' => {
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result.push_str(chr.escape_unicode().to_string().as_str());
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}
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_ => {
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result.push(chr);
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}
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}
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}
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result.push_str("\")\n");
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}
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OpCode::_NOP => result.push_str("%no_op()\n"),
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OpCode::_UNI => result.push_str("%unimplemented()\n"),
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OpCode::_END => result.push_str("%end_marker()\n"),
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}
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} else {
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break;
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}
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}
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Ok(result)
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} else {
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Err(InvalidValue("Unknown script.".to_string()))
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}
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}
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}
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