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100 lines
2.3 KiB
100 lines
2.3 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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alphtype int;
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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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value = 0;
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size_t len = fpc - start;
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dbc::check(start[0] != '-', "negative numbers not supported");
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switch(len) {
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case 10: value += (start[len-10] - '0') * 1000000000;
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case 9: value += (start[len- 9] - '0') * 100000000;
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case 8: value += (start[len- 8] - '0') * 10000000;
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case 7: value += (start[len- 7] - '0') * 1000000;
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case 6: value += (start[len- 6] - '0') * 100000;
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case 5: value += (start[len- 5] - '0') * 10000;
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case 4: value += (start[len- 4] - '0') * 1000;
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case 3: value += (start[len- 3] - '0') * 100;
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case 2: value += (start[len- 2] - '0') * 10;
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case 1: value += (start[len- 1] - '0');
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break;
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default:
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dbc::sentinel("can't process > 10 digits");
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}
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}
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action color24b { }
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action is_fg {
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target = color;
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}
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action is_bg {
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target = bgcolor;
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}
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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::wstring_view codes, sf::Color default_fg, sf::Color default_bg, WriteCB write) {
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const wchar_t *start = NULL;
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int cs = 0;
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unsigned int value = 0;
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const wchar_t *p = codes.data();
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const wchar_t *pe = p + codes.size();
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const wchar_t *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 = color;
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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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