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Renderer of ANSI codes to SFML is now working. Does seem to be a little slow but that'll be easy to fix later.

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This commit is contained in:
Zed A. Shaw 2024-11-02 03:53:33 -04:00
parent ae484bf425
commit a36b187879
8 changed files with 96 additions and 62 deletions
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32
ansi_parser.rl
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@ -9,14 +9,32 @@ using namespace fmt;
%%{
machine foo;
alphtype int;
action tstart {
start = fpc;
}
action number {
auto [ptr, ec] = std::from_chars(start, fpc, value);
dbc::check(ec == std::errc(), "error in number parsing");
value = 0;
size_t len = fpc - start;
dbc::check(start[0] != '-', "negative numbers not supported");
switch(len) {
case 10: value += (start[len-10] - '0') * 1000000000;
case 9: value += (start[len- 9] - '0') * 100000000;
case 8: value += (start[len- 8] - '0') * 10000000;
case 7: value += (start[len- 7] - '0') * 1000000;
case 6: value += (start[len- 6] - '0') * 100000;
case 5: value += (start[len- 5] - '0') * 10000;
case 4: value += (start[len- 4] - '0') * 1000;
case 3: value += (start[len- 3] - '0') * 100;
case 2: value += (start[len- 2] - '0') * 10;
case 1: value += (start[len- 1] - '0');
break;
default:
dbc::sentinel("can't process > 10 digits");
}
}
action color24b { }
@ -60,13 +78,13 @@ using namespace fmt;
%% write data;
bool parse_ansi(std::string_view codes, sf::Color default_fg, sf::Color default_bg, WriteCB write) {
const char *start = NULL;
bool parse_ansi(std::wstring_view codes, sf::Color default_fg, sf::Color default_bg, WriteCB write) {
const wchar_t *start = NULL;
int cs = 0;
unsigned int value = 0;
const char *p = codes.data();
const char *pe = p + codes.size();
const char *eof = pe;
const wchar_t *p = codes.data();
const wchar_t *pe = p + codes.size();
const wchar_t *eof = pe;
sf::Color bgcolor(default_bg);
sf::Color color(default_fg);
sf::Color &target = bgcolor;