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78 lines
1.6 KiB
78 lines
1.6 KiB
#include <fmt/core.h>
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#include <string_view>
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#include <charconv>
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#include "dbc.hpp"
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#include <SFML/Graphics.hpp>
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#include "ansi_parser.hpp"
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using namespace fmt;
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%%{
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machine foo;
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action tstart {
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start = fpc;
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}
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action number {
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auto [ptr, ec] = std::from_chars(start, fpc, value);
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dbc::check(ec == std::errc(), "error in number parsing");
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}
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action color24b { }
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action is_fg { target = color; }
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action is_bg { target = bgcolor; }
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action out {
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write(bgcolor, color, fc);
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}
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action reset_fg { color = default_fg; }
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action reset_bg { bgcolor = default_bg; }
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action red { target.r = value; }
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action blue { target.g = value; }
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action green { target.b = value; }
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action start { value = 0; }
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action end { }
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ESC = 0x1B;
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start = ESC "[";
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fg = "38;" %is_fg;
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bg = "48;" %is_bg;
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reset = ("39" %reset_fg | "49" %reset_bg);
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num = digit+ >tstart %number;
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color256 = "5;";
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color24b = "2;";
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ansi = (
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start %start
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(
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reset |
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(fg|bg) color24b num %red ";" num %blue ";" num %green %color24b
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) "m" %end
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);
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other = (any+ @out -- ESC)*;
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main := (other :> ansi)**;
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}%%
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%% write data;
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bool parse_ansi(std::string_view codes, sf::Color default_fg, sf::Color default_bg, WriteCB write) {
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const char *start = NULL;
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int cs = 0;
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unsigned int value = 0;
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const char *p = codes.data();
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const char *pe = p + codes.size();
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const char *eof = pe;
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sf::Color bgcolor(default_bg);
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sf::Color color(default_fg);
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sf::Color &target = bgcolor;
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%% write init;
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%% write exec;
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return p - pe == 0;
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}
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