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51 lines
1.4 KiB
51 lines
1.4 KiB
use std::cell::RefCell;
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use std::sync::Arc;
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use sexp::SourcePosition;
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use crate::asm::instr::flatten::labels_to_skips;
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use crate::asm::parse::{ParserContext, ParserState};
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use crate::module::{CrsnExtension, CrsnUniq};
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use crate::runtime::program::Program;
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use crate::builtin::BuiltinOps;
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pub mod data;
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pub mod error;
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pub mod instr;
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pub mod parse;
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pub mod patches;
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/// Parse a program from string and assemble a low level instruction sequence from it.
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pub fn assemble(source: &str, uniq : &CrsnUniq, mut parsers: Vec<Box<dyn CrsnExtension>>) -> Result<Arc<Program>, error::CrsnError> {
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parsers.insert(0, BuiltinOps::new());
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for p in &mut parsers {
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p.init(uniq);
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}
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// remove first line if it looks like a shebang
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let source = if source.starts_with("#!") {
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if let Some(nl) = source.find('\n') {
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&source[nl + 1..]
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} else {
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source
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}
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} else {
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source
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};
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let pcx = ParserContext {
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parsers: &parsers,
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state: RefCell::new(ParserState {
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reg_aliases: Default::default(),
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reg_alias_stack: vec![],
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global_reg_aliases: Default::default(),
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constants: Default::default(),
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}),
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};
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let ops = parse::parse(source, &SourcePosition::default(), &pcx)?;
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let ops = labels_to_skips(ops)?;
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Ok(Program::new(ops, Arc::new(parsers))?)
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}
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