74 lines
3.1 KiB
Rust
74 lines
3.1 KiB
Rust
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use std::error::Error;
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use std::fs;
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use std::path::PathBuf;
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pub fn normalize(file: PathBuf) -> Result<String, Box<dyn Error>> {
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let file_str = fs::read_to_string(file)?;
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let mut normalized = "; This file has only been normalized. It has not been processed or optimized.\n; This code cannot yet directly be passed into the assembler.\n".to_string();
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normalized += "; t+normalizer:tmCPU t+preprocessor:none t+optimizer:none @generated\n";
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for (line_num, line) in file_str.lines().enumerate() {
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let line_split: Vec<&str> = line.split(' ').collect();
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match line_split[0] {
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"lsh" => {
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if line_split.len() != 3 {
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return Err(format!("line {}: expected exactly 2 arguments to 'lsh', instead got {}", line_num, line_split.len() - 1).into());
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}
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let dest = line_split[1];
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if !dest.ends_with(',') {
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return Err(format!("line {}: arg 1 to 'lsh' must end in ','", line_num).into());
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}
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let dest = &dest[..dest.len()-1];
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let rg = line_split[2];
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normalized += &format!("add {}, {} {} ; normalizer: originally '{}'\n", dest, rg, rg, line);
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},
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"cmp" => {
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if line_split.len() != 3 {
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return Err(format!("line {}: expected exactly 2 arguments to 'cmp', instead got {}", line_num, line_split.len() - 1).into());
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}
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let a = line_split[1];
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let b = line_split[2];
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normalized += &format!("sub r0, {} {} ; normalizer: originally '{}'\n", a, b, line);
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},
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"cpy" => {
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if line_split.len() != 3 {
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return Err(format!("line {}: expected exactly 2 arguments to 'cpy', instead got {}", line_num, line_split.len() - 1).into());
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}
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let dest = line_split[1];
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let a = line_split[2];
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if !dest.ends_with(',') {
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return Err(format!("line {}: arg 1 to 'lsh' must end in ','", line_num).into());
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}
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normalized += "ldi r0, 0 ; normalizer: originally below\n";
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normalized += &format!("add {}, {} r0 ; normalizer: originally '{}'\n", &dest[..dest.len()-1], a, line);
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},
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"not" => {
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if line_split.len() != 3 {
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return Err(format!("line {}: expected exactly 2 arguments to 'not', instead got {}", line_num, line_split.len() - 1).into());
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}
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let dest = line_split[1];
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let a = line_split[2];
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if !dest.ends_with(',') {
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return Err(format!("line {}: arg 1 to 'not' must end in ','", line_num).into());
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}
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normalized += "ldi r0, 0 ; normalizer: originally below\n";
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normalized += &format!("nor {}, {} r0 ; normalizer: originally '{}'\n", &dest[..dest.len()-1], a, line);
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}
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_ => {
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normalized += line;
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normalized += "\n";
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}
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}
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}
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Ok(normalized)
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}
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