Noratrieb/m8db
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nora 2021-09-19 00:04:40 +02:00
parent ca75288316
commit c38a932d23
2 changed files with 13 additions and 15 deletions
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2
README.md
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@ -4,7 +4,7 @@ Debugger and interpreter for the M8 pseudo-assembly language. Inspired by `gdb`
More infos: https://github.com/ah1m1/M8NI
Usage: `$ ./m8db <filename>`
Usage: `$ ./m8db (filename)`
# Instructions:

26
src/db.rs
View file

@ -96,9 +96,9 @@ fn read_and_run<'a>(path: &str) {
match std::fs::read_to_string(path) {
Ok(content) => match stmt::parse(&content, filename(&path)) {
Ok(stmts) => run(stmts),
Err(why) => eprintln!("parse error: {}", why),
Err(why) => eprintln!("error while parsing: {}.", why),
},
Err(why) => eprintln!("file error: {}", why),
Err(why) => eprintln!("error while reading file: {}.", why),
};
}
@ -116,11 +116,11 @@ fn loading_input() -> LoadInstruction {
match str {
"l" | "load" => match iter.next() {
Some(path) => return LoadInstruction::Load(path.to_owned()),
None => println!("No file path provided to load from"),
None => println!("error: No file path provided to load from."),
},
"h" | "help" => print_load_help(),
"q" | "quit" => return LoadInstruction::Quit,
_ => {}
cmd => println!("error: Unknown command: {}.", cmd),
}
}
}
@ -150,7 +150,9 @@ fn run(code: Code) {
eprintln!("error: Program ran out of bounds.");
return;
}
VmState::Run => unreachable!("Program still running after returning from run"),
VmState::Run => {
unreachable!("internal error: Program still running after returning from run.")
}
_ => {}
},
VmInstruction::Step => match vm.step() {
@ -195,7 +197,7 @@ fn debug_input(vm: &Vm) -> VmInstruction {
Some(pos) => pos,
None => {
println!(
"Line number '{}' out of bounds for length {}.",
"error: Line number '{}' out of bounds for length {}.",
line_number,
vm.code_lines.len()
);
@ -204,13 +206,13 @@ fn debug_input(vm: &Vm) -> VmInstruction {
};
return VmInstruction::Break(stmt_pos);
}
Err(_) => println!("Invalid argument provided"),
Err(_) => println!("error: Invalid argument provided."),
},
None => print_breakpoints(vm),
},
"set" => match parse_set_command(&mut iter) {
Some((reg, value)) => return VmInstruction::Set(reg, value),
None => println!("Invalid arguments provided"),
None => println!("error: Invalid arguments provided."),
},
"c" | "continue" => {
if let Some("time") = iter.next() {
@ -220,7 +222,7 @@ fn debug_input(vm: &Vm) -> VmInstruction {
}
"s" | "step" => return VmInstruction::Step,
"q" | "quit" => return VmInstruction::Stop,
_ => {}
cmd => println!("error: Unknown command: {}.", cmd),
}
}
}
@ -257,11 +259,7 @@ fn print_program(vm: &Vm) {
use std::cmp::min;
if let Some(span_pc) = vm.span.get(vm.pc) {
println!(
"Program: (pc = {}, line = {})",
vm.pc,
span_pc.line_number()
);
println!("Program:");
let lower = span_pc.0.saturating_sub(5);
let higher = min(vm.code_lines.len(), span_pc.0 + 6);