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use crate::*;
pub struct DebugSymbols {
symbols: Vec<DebugSymbol>
}
impl DebugSymbols {
/// Load debug symbols from a symbols file.
pub fn from_path_opt<P: AsRef<Path>>(path: Option<P>) -> Self {
let mut symbols = Vec::new();
if let Some(path) = path {
if let Ok(string) = std::fs::read_to_string(path) {
for line in string.lines() {
if let Some(symbol) = DebugSymbol::from_line(line) {
symbols.push(symbol);
}
}
}
}
symbols.sort_by_key(|s| s.address);
Self { symbols }
}
/// Return the symbol matching a given address.
pub fn for_address(&self, address: u16) -> Option<&DebugSymbol> {
if self.symbols.is_empty() { return None; }
let symbol = match self.symbols.binary_search_by_key(&address, |s| s.address) {
Ok(index) => self.symbols.get(index)?,
Err(index) => self.symbols.get(index.checked_sub(1)?)?,
};
Some(&symbol)
}
}
pub struct DebugSymbol {
pub address: u16,
pub name: String,
pub location: Option<String>,
}
impl DebugSymbol {
pub fn from_line(line: &str) -> Option<Self> {
if let Some((address, line)) = line.split_once(' ') {
let address = u16::from_str_radix(address, 16).ok()?;
if let Some((name, location)) = line.split_once(' ') {
let name = name.to_string();
let location = Some(location.to_string());
Some( DebugSymbol { address, name, location } )
} else {
let name = line.to_string();
Some( DebugSymbol { address, name, location: None } )
}
} else {
None
}
}
}
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