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45 lines
1.2 KiB
45 lines
1.2 KiB
#[macro_use]
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extern crate log;
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use crsn::asm::error::CrsnError;
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use crsn::asm::instr::op::OpKind;
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use crsn::asm::parse::arg_parser::TokenParser;
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use crsn::module::{CrsnExtension, ParseRes};
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use crsn::sexp::SourcePosition;
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use crsn::asm::data::literal::Value;
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use crate::exec::{OPT_AUTO_BLIT, OPT_FRAME_RATE, OPT_UPSCALE};
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mod defs;
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mod parse;
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mod exec;
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#[derive(Debug, Clone)]
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pub struct ScreenOps;
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impl ScreenOps {
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pub fn new() -> Box<dyn CrsnExtension> {
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Box::new(Self)
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}
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}
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impl CrsnExtension for ScreenOps {
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fn name(&self) -> &'static str {
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"screen"
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}
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fn parse_op<'a>(&self, pos: &SourcePosition, keyword: &str, args: TokenParser<'a>) -> Result<ParseRes<'a, OpKind>, CrsnError> {
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parse::parse(pos, keyword, args)
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}
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/// Get value of an extension-provided constant.
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/// This constant may be an object handle, or a constant value used as argument in some other instruction.
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fn get_constant_value<'a>(&self, name: &str) -> Option<Value>
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{
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match name {
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"SCREEN_AUTO_BLIT" => Some(OPT_AUTO_BLIT),
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"SCREEN_FPS" => Some(OPT_FRAME_RATE),
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"SCREEN_UPSCALE" => Some(OPT_UPSCALE),
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_ => None
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}
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}
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}
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