03ee007624
* cton-util: fix some clippy unnecessary pass-by-value warnings * clippy: ignore too many arguments / cyclomatic complexity in module since these functions are taking args coming from the command line, i dont think this is actually a valid lint, morally the arguments are all from one structure * cton-util: take care of remaining clippy warnings * cton-reader: fix all non-suspicious clippy warnings * cton-reader: disable clippy at site of suspicious lint * cton-frontend: disable clippy at the site of an invalid lint * cton-frontend: fix clippy warnings, or ignore benign ones * clippy: ignore the camelcase word WebAssembly in docs * cton-wasm: fix clippy complaints or ignore benign ones * cton-wasm tests: fix clippy complaints * cretonne: starting point turns off all clippy warnings * cretonne: clippy fixes, or lower allow() to source of problem * cretonne: more clippy fixes * cretonne: fix or disable needless_lifetimes lint this linter is buggy when the declared lifetime is used for another type constraint. * cretonne: fix clippy complaint about Pass::NoPass * rustfmt * fix prev minor api changes clippy suggested * add clippy to test-all * cton-filetests: clippy fixes * simplify clippy reporting in test-all * cretonne: document clippy allows better * cretonne: fix some more clippy lints * cretonne: fix clippy lints (mostly doc comments) * cretonne: allow all needless_lifetimes clippy warnings remove overrides at the false positives * rustfmt
70 lines
2.2 KiB
Rust
70 lines
2.2 KiB
Rust
//! Utility functions.
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use cretonne::isa::TargetIsa;
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use cretonne::settings::{self, FlagsOrIsa};
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use cretonne::isa;
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use cton_reader::{parse_options, Location};
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use std::fs::File;
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use std::io::{self, Read};
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use std::path::Path;
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/// Read an entire file into a string.
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pub fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
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let mut file = File::open(path)?;
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let mut buffer = String::new();
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file.read_to_string(&mut buffer)?;
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Ok(buffer)
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}
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/// Read an entire file into a vector of bytes.
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pub fn read_to_end<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
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let mut file = File::open(path)?;
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let mut buffer = Vec::new();
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file.read_to_end(&mut buffer)?;
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Ok(buffer)
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}
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/// Like `FlagsOrIsa`, but holds ownership.
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pub enum OwnedFlagsOrIsa {
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Flags(settings::Flags),
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Isa(Box<TargetIsa>),
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}
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impl OwnedFlagsOrIsa {
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/// Produce a FlagsOrIsa reference.
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pub fn as_fisa(&self) -> FlagsOrIsa {
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match *self {
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OwnedFlagsOrIsa::Flags(ref flags) => FlagsOrIsa::from(flags),
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OwnedFlagsOrIsa::Isa(ref isa) => FlagsOrIsa::from(&**isa),
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}
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}
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}
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/// Parse "set" and "isa" commands.
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pub fn parse_sets_and_isa(flag_set: &[String], flag_isa: &str) -> Result<OwnedFlagsOrIsa, String> {
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let mut flag_builder = settings::builder();
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parse_options(
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flag_set.iter().map(|x| x.as_str()),
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&mut flag_builder,
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&Location { line_number: 0 },
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).map_err(|err| err.to_string())?;
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let mut words = flag_isa.trim().split_whitespace();
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// Look for `isa foo`.
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if let Some(isa_name) = words.next() {
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let mut isa_builder = isa::lookup(isa_name).map_err(|err| match err {
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isa::LookupError::Unknown => format!("unknown ISA '{}'", isa_name),
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isa::LookupError::Unsupported => format!("support for ISA '{}' not enabled", isa_name),
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})?;
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// Apply the ISA-specific settings to `isa_builder`.
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parse_options(words, &mut isa_builder, &Location { line_number: 0 })
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.map_err(|err| err.to_string())?;
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Ok(OwnedFlagsOrIsa::Isa(
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isa_builder.finish(settings::Flags::new(&flag_builder)),
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))
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} else {
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Ok(OwnedFlagsOrIsa::Flags(settings::Flags::new(&flag_builder)))
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}
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}
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