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use std::mem;
use Result;
use tape::{Tape, Value};
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum NamingTable {
Format0(NamingTable0),
Format1(NamingTable1),
}
table! {
#[doc = "A naming table of format 0."]
pub NamingTable0 {
format (u16 ),
count (u16 ),
stringOffset (u16 ),
nameRecord (Vec<NameRecord>) |tape, this| { read_vector!(tape, this.count) },
storage (Vec<u8> ) |tape, this| { this.read_storage(tape) },
}
}
table! {
#[doc = "A naming table of format 1."]
pub NamingTable1 {
format (u16 ),
count (u16 ),
stringOffset (u16 ),
nameRecord (Vec<NameRecord> ) |tape, this| { read_vector!(tape, this.count) },
langTagCount (u16 ),
langTagRecord (Vec<LanguageTagRecord>) |tape, this| { read_vector!(tape,
this.langTagCount) },
storage (Vec<u8> ) |tape, this| { this.read_storage(tape) },
}
}
table! {
#[doc = "A name record of a naming table."]
#[derive(Copy)]
#[repr(C)]
pub NameRecord {
platformID (u16),
encodingID (u16),
languageID (u16),
nameID (u16),
length (u16),
offset (u16),
}
}
table! {
#[doc = "A language-tag record of a naming table."]
#[derive(Copy)]
#[repr(C)]
pub LanguageTagRecord {
length (u16),
offset (u16),
}
}
impl Value for NamingTable {
fn read<T: Tape>(tape: &mut T) -> Result<Self> {
Ok(match try!(tape.peek::<u16>()) {
0 => NamingTable::Format0(try!(Value::read(tape))),
1 => NamingTable::Format1(try!(Value::read(tape))),
_ => raise!("the format of the naming table is not supported"),
})
}
}
impl NamingTable0 {
#[inline]
pub fn strings(&self) -> Result<Vec<String>> {
strings(&self.nameRecord, &self.storage)
}
fn read_storage<T: Tape>(&self, tape: &mut T) -> Result<Vec<u8>> {
let current = try!(tape.position());
let above = 3 * 2 + self.nameRecord.len() * mem::size_of::<NameRecord>();
try!(tape.jump(current - above as u64 + self.stringOffset as u64));
read_vector!(tape, storage_length(&self.nameRecord), u8)
}
}
impl NamingTable1 {
#[inline]
pub fn strings(&self) -> Result<Vec<String>> {
strings(&self.nameRecord, &self.storage)
}
fn read_storage<T: Tape>(&self, tape: &mut T) -> Result<Vec<u8>> {
let current = try!(tape.position());
let above = 4 * 2 + self.nameRecord.len() * mem::size_of::<NameRecord>() +
self.langTagRecord.len() * mem::size_of::<LanguageTagRecord>();
try!(tape.jump(current - above as u64 + self.stringOffset as u64));
read_vector!(tape, storage_length(&self.nameRecord), u8)
}
}
fn storage_length(records: &[NameRecord]) -> usize {
let mut length = 0;
for record in records {
let end = record.offset + record.length + 1;
if end > length {
length = end;
}
}
length as usize
}
fn strings(records: &[NameRecord], storage: &[u8]) -> Result<Vec<String>> {
let mut strings = vec![];
for record in records {
let (offset, length) = (record.offset as usize, record.length as usize);
let bytes = &storage[offset..(offset + length)];
match record.platformID {
1 => match decode_macintosh(bytes, record.encodingID) {
Some(string) => {
strings.push(string);
continue;
},
_ => {},
},
_ => {},
}
strings.push("<unsupported>".to_string());
}
Ok(strings)
}
fn decode_macintosh(bytes: &[u8], encoding: u16) -> Option<String> {
const ROMAN: [char; 128] = ['Ä', 'Å', 'Ç', 'É', 'Ñ', 'Ö', 'Ü', 'á', 'à', 'â', 'ä', 'ã', 'å',
'ç', 'é', 'è', 'ê', 'ë', 'í', 'ì', 'î', 'ï', 'ñ', 'ó', 'ò', 'ô',
'ö', 'õ', 'ú', 'ù', 'û', 'ü', '†', '°', '¢', '£', '§', '•', '¶',
'ß', '®', '©', '™', '´', '¨', '≠', 'Æ', 'Ø', '∞', '±', '≤', '≥',
'¥', 'µ', '∂', '∑', '∏', 'π', '∫', 'ª', 'º', 'Ω', 'æ', 'ø', '¿',
'¡', '¬', '√', 'ƒ', '≈', '∆', '«', '»', '…', ' ', 'À', 'Ã', 'Õ',
'Œ', 'œ', '–', '—', '“', '”', '‘', '’', '÷', '◊', 'ÿ', 'Ÿ', '⁄',
'€', '‹', '›', 'fi', 'fl', '‡', '·', '‚', '„', '‰', 'Â', 'Ê', 'Á',
'Ë', 'È', 'Í', 'Î', 'Ï', 'Ì', 'Ó', 'Ô', '', 'Ò', 'Ú', 'Û', 'Ù',
'ı', 'ˆ', '˜', '¯', '˘', '˙', '˚', '¸', '˝', '˛', 'ˇ'];
if encoding != 0 {
return None;
}
let table = &ROMAN;
let mut string = String::new();
for &byte in bytes {
if byte <= 0x7F {
string.push(byte as char);
} else {
string.push(table[(byte & 0x7F) as usize]);
}
}
Some(string)
}