1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188
use crate::FromBytes; use crate::ToBytes; use crate::{ errors::{ReadError, ReadResult}, ksmfile::sections::CodeSection, }; use flate2::write::GzEncoder; use flate2::{read::GzDecoder, Compression}; use std::{ io::{Read, Write}, iter::Peekable, slice::Iter, }; use self::sections::{ArgumentSection, DebugSection}; pub mod sections; pub mod instructions; pub use instructions::Instr; const KSM_MAGIC_NUMBER: u32 = 0x4558036b; pub struct KSMFile { header: KSMHeader, arg_section: ArgumentSection, code_sections: Vec<CodeSection>, debug_section: DebugSection, } impl KSMFile { pub fn new() -> Self { KSMFile { header: KSMHeader::new(), arg_section: ArgumentSection::new(), code_sections: Vec::new(), debug_section: DebugSection::new(1), } } pub fn arg_section(&self) -> &ArgumentSection { &self.arg_section } pub fn arg_section_mut(&mut self) -> &mut ArgumentSection { &mut self.arg_section } pub fn code_sections(&self) -> Iter<CodeSection> { self.code_sections.iter() } pub fn add_code_section(&mut self, code_section: CodeSection) { self.code_sections.push(code_section); } pub fn debug_section(&self) -> &DebugSection { &self.debug_section } pub fn debug_section_mut(&mut self) -> &mut DebugSection { &mut self.debug_section } } impl ToBytes for KSMFile { fn to_bytes(&self, buf: &mut Vec<u8>) { let mut uncompressed_buf = Vec::with_capacity(2048); let mut zipped_contents = Vec::with_capacity(2048); self.header.to_bytes(&mut uncompressed_buf); self.arg_section.to_bytes(&mut uncompressed_buf); let mut encoder = GzEncoder::new(&mut zipped_contents, Compression::best()); for code_section in self.code_sections.iter() { code_section.to_bytes(&mut uncompressed_buf, self.arg_section.num_index_bytes()); } self.debug_section.to_bytes(&mut uncompressed_buf); encoder .write_all(&uncompressed_buf) .expect("Error compressing KSM file"); encoder .finish() .expect("Error finishing KSM file compression"); buf.append(&mut zipped_contents); } } impl FromBytes for KSMFile { fn from_bytes(source: &mut Peekable<Iter<u8>>, debug: bool) -> ReadResult<Self> where Self: Sized, { let zipped_contents: Vec<u8> = source.map(|b| *b).collect(); let mut decoder = GzDecoder::new(zipped_contents.as_slice()); let mut decompressed: Vec<u8> = Vec::with_capacity(2048); decoder .read_to_end(&mut decompressed) .map_err(|e| ReadError::KSMDecompressionError(e))?; let mut decompressed_source = decompressed.iter().peekable(); let header = KSMHeader::from_bytes(&mut decompressed_source, debug)?; let arg_section = ArgumentSection::from_bytes(&mut decompressed_source, debug)?; let mut code_sections = Vec::new(); loop { let delimiter = u8::from_bytes(&mut decompressed_source, debug) .map_err(|_| ReadError::MissingCodeSectionError)?; if delimiter != b'%' { return Err(ReadError::ExpectedCodeSectionError(delimiter)); } if let Some(next) = decompressed_source.peek() { if **next == b'D' { break; } let code_section = CodeSection::from_bytes( &mut decompressed_source, debug, arg_section.num_index_bytes(), )?; code_sections.push(code_section); } else { return Err(ReadError::MissingCodeSectionError); } } let debug_section = DebugSection::from_bytes(&mut decompressed_source, debug)?; let ksm = KSMFile { header, arg_section, code_sections, debug_section, }; Ok(ksm) } } pub struct KSMHeader { magic: u32, } impl KSMHeader { pub fn new() -> Self { KSMHeader { magic: KSM_MAGIC_NUMBER, } } } impl ToBytes for KSMHeader { fn to_bytes(&self, buf: &mut Vec<u8>) { self.magic.to_bytes(buf); } } impl FromBytes for KSMHeader { fn from_bytes(source: &mut Peekable<Iter<u8>>, debug: bool) -> ReadResult<Self> where Self: Sized, { let magic = u32::from_bytes(source, debug) .map_err(|_| ReadError::KSMHeaderReadError("file magic"))?; if magic != KSM_MAGIC_NUMBER { return Err(ReadError::InvalidKSMFileMagicError); } Ok(KSMHeader::new()) } }