98 lines
3.0 KiB
Rust
98 lines
3.0 KiB
Rust
//! Utility functions.
|
|
|
|
use cranelift_codegen::isa;
|
|
use cranelift_codegen::isa::TargetIsa;
|
|
use cranelift_codegen::settings::{self, FlagsOrIsa};
|
|
use cranelift_reader::{parse_options, Location};
|
|
use std::fs::File;
|
|
use std::io::{self, Read};
|
|
use std::path::Path;
|
|
use std::str::FromStr;
|
|
use target_lexicon::Triple;
|
|
|
|
/// Read an entire file into a string.
|
|
pub fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
|
|
let mut buffer = String::new();
|
|
if path.as_ref() == Path::new("-") {
|
|
let stdin = io::stdin();
|
|
let mut stdin = stdin.lock();
|
|
stdin.read_to_string(&mut buffer)?;
|
|
} else {
|
|
let mut file = File::open(path)?;
|
|
file.read_to_string(&mut buffer)?;
|
|
}
|
|
Ok(buffer)
|
|
}
|
|
|
|
/// Read an entire file into a vector of bytes.
|
|
#[cfg(feature = "wasm")]
|
|
pub fn read_to_end<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
|
|
let mut buffer = Vec::new();
|
|
if path.as_ref() == Path::new("-") {
|
|
let stdin = io::stdin();
|
|
let mut stdin = stdin.lock();
|
|
stdin.read_to_end(&mut buffer)?;
|
|
} else {
|
|
let mut file = File::open(path)?;
|
|
file.read_to_end(&mut buffer)?;
|
|
}
|
|
Ok(buffer)
|
|
}
|
|
|
|
/// Like `FlagsOrIsa`, but holds ownership.
|
|
pub enum OwnedFlagsOrIsa {
|
|
Flags(settings::Flags),
|
|
Isa(Box<dyn TargetIsa>),
|
|
}
|
|
|
|
impl OwnedFlagsOrIsa {
|
|
/// Produce a FlagsOrIsa reference.
|
|
pub fn as_fisa(&self) -> FlagsOrIsa {
|
|
match *self {
|
|
Self::Flags(ref flags) => FlagsOrIsa::from(flags),
|
|
Self::Isa(ref isa) => FlagsOrIsa::from(&**isa),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Parse "set" and "triple" commands.
|
|
pub fn parse_sets_and_triple(
|
|
flag_set: &[String],
|
|
flag_triple: &str,
|
|
) -> Result<OwnedFlagsOrIsa, String> {
|
|
let mut flag_builder = settings::builder();
|
|
parse_options(
|
|
flag_set.iter().map(|x| x.as_str()),
|
|
&mut flag_builder,
|
|
Location { line_number: 0 },
|
|
)
|
|
.map_err(|err| err.to_string())?;
|
|
|
|
let mut words = flag_triple.trim().split_whitespace();
|
|
// Look for `target foo`.
|
|
if let Some(triple_name) = words.next() {
|
|
let triple = match Triple::from_str(triple_name) {
|
|
Ok(triple) => triple,
|
|
Err(parse_error) => return Err(parse_error.to_string()),
|
|
};
|
|
let mut isa_builder = isa::lookup(triple).map_err(|err| match err {
|
|
isa::LookupError::SupportDisabled => {
|
|
format!("support for triple '{}' is disabled", triple_name)
|
|
}
|
|
isa::LookupError::Unsupported => format!(
|
|
"support for triple '{}' is not implemented yet",
|
|
triple_name
|
|
),
|
|
})?;
|
|
// Apply the ISA-specific settings to `isa_builder`.
|
|
parse_options(words, &mut isa_builder, Location { line_number: 0 })
|
|
.map_err(|err| err.to_string())?;
|
|
|
|
Ok(OwnedFlagsOrIsa::Isa(
|
|
isa_builder.finish(settings::Flags::new(flag_builder)),
|
|
))
|
|
} else {
|
|
Ok(OwnedFlagsOrIsa::Flags(settings::Flags::new(flag_builder)))
|
|
}
|
|
}
|