Barely working ansi color codes parser but I _really_ don't like this one. Too much code to just get it to process correctly which means it'll be brittle as hell later.

Makefile

@@ -5,6 +5,7 @@ reset:
 
 ragel:
 	ragel -o .\scratchpad\testragel.cpp .\scratchpad\testragel.rl
+	ragel -o .\ansi_parser.cpp .\ansi_parser.rl
 
 build:
 	meson compile -j 4 -C builddir

ansi_parser.cpp

@@ -0,0 +1,302 @@
+
+#line 1 ".\\ansi_parser.rl"
+#include <fmt/core.h>
+#include <string_view>
+#include <charconv>
+#include "dbc.hpp"
+
+using namespace fmt;
+
+
+#line 80 ".\\ansi_parser.rl"
+
+
+
+#line 11 ".\\ansi_parser.cpp"
+static const char _foo_actions[] = {
+	0, 1, 0, 1, 1, 1, 8, 1, 
+	9, 1, 10, 2, 1, 2, 2, 1, 
+	3, 2, 1, 4, 2, 1, 5, 2, 
+	6, 0, 2, 7, 0, 2, 9, 0, 
+	2, 10, 8
+};
+
+static const char _foo_key_offsets[] = {
+	0, 0, 1, 2, 7, 11, 13, 16, 
+	21, 25, 29, 33, 35, 38, 40, 43, 
+	45, 48, 52, 54, 57, 59, 62, 67, 
+	71, 75, 76
+};
+
+static const char _foo_trans_keys[] = {
+	27, 91, 51, 52, 109, 48, 57, 59, 
+	109, 48, 57, 48, 57, 109, 48, 57, 
+	56, 59, 109, 48, 57, 59, 109, 48, 
+	57, 50, 53, 48, 57, 59, 109, 48, 
+	57, 48, 57, 59, 48, 57, 48, 57, 
+	59, 48, 57, 48, 57, 109, 48, 57, 
+	59, 109, 48, 57, 48, 57, 59, 48, 
+	57, 48, 57, 109, 48, 57, 56, 59, 
+	109, 48, 57, 59, 109, 48, 57, 50, 
+	53, 48, 57, 27, 27, 0
+};
+
+static const char _foo_single_lengths[] = {
+	0, 1, 1, 3, 2, 0, 1, 3, 
+	2, 2, 2, 0, 1, 0, 1, 0, 
+	1, 2, 0, 1, 0, 1, 3, 2, 
+	2, 1, 1
+};
+
+static const char _foo_range_lengths[] = {
+	0, 0, 0, 1, 1, 1, 1, 1, 
+	1, 1, 1, 1, 1, 1, 1, 1, 
+	1, 1, 1, 1, 1, 1, 1, 1, 
+	1, 0, 0
+};
+
+static const char _foo_index_offsets[] = {
+	0, 0, 2, 4, 9, 13, 15, 18, 
+	23, 27, 31, 35, 37, 40, 42, 45, 
+	47, 50, 54, 56, 59, 61, 64, 69, 
+	73, 77, 79
+};
+
+static const char _foo_trans_targs[] = {
+	2, 1, 3, 0, 7, 22, 26, 4, 
+	0, 5, 26, 4, 0, 6, 0, 26, 
+	6, 0, 8, 5, 26, 4, 0, 9, 
+	26, 4, 0, 10, 17, 6, 0, 11, 
+	26, 6, 0, 12, 0, 13, 12, 0, 
+	14, 0, 15, 14, 0, 16, 0, 26, 
+	16, 0, 18, 26, 6, 0, 19, 0, 
+	20, 19, 0, 21, 0, 26, 21, 0, 
+	23, 5, 26, 4, 0, 24, 26, 4, 
+	0, 10, 17, 6, 0, 2, 1, 2, 
+	1, 0
+};
+
+static const char _foo_trans_actions[] = {
+	0, 5, 0, 0, 29, 29, 7, 29, 
+	0, 3, 17, 0, 0, 1, 0, 20, 
+	0, 0, 0, 3, 17, 0, 0, 3, 
+	17, 0, 0, 26, 26, 1, 0, 0, 
+	20, 0, 0, 1, 0, 3, 0, 0, 
+	1, 0, 3, 0, 0, 1, 0, 14, 
+	0, 0, 0, 20, 0, 0, 1, 0, 
+	3, 0, 0, 1, 0, 11, 0, 0, 
+	0, 3, 17, 0, 0, 3, 17, 0, 
+	0, 23, 23, 1, 0, 0, 5, 9, 
+	32, 0
+};
+
+static const char _foo_eof_actions[] = {
+	0, 0, 0, 0, 0, 0, 0, 0, 
+	0, 0, 0, 0, 0, 0, 0, 0, 
+	0, 0, 0, 0, 0, 0, 0, 0, 
+	0, 0, 9
+};
+
+static const int foo_start = 25;
+static const int foo_first_final = 25;
+static const int foo_error = 0;
+
+static const int foo_en_main = 25;
+
+
+#line 83 ".\\ansi_parser.rl"
+
+bool parse_ansi(std::string_view codes) {
+  const char *start = NULL;
+  int cs = 0;
+  size_t value = 0;
+  const char *p = codes.data();
+  const char *pe = p + codes.size();
+  const char *eof = pe;
+
+
+  
+#line 111 ".\\ansi_parser.cpp"
+	{
+	cs = foo_start;
+	}
+
+#line 94 ".\\ansi_parser.rl"
+  
+#line 114 ".\\ansi_parser.cpp"
+	{
+	int _klen;
+	unsigned int _trans;
+	const char *_acts;
+	unsigned int _nacts;
+	const char *_keys;
+
+	if ( p == pe )
+		goto _test_eof;
+	if ( cs == 0 )
+		goto _out;
+_resume:
+	_keys = _foo_trans_keys + _foo_key_offsets[cs];
+	_trans = _foo_index_offsets[cs];
+
+	_klen = _foo_single_lengths[cs];
+	if ( _klen > 0 ) {
+		const char *_lower = _keys;
+		const char *_mid;
+		const char *_upper = _keys + _klen - 1;
+		while (1) {
+			if ( _upper < _lower )
+				break;
+
+			_mid = _lower + ((_upper-_lower) >> 1);
+			if ( (*p) < *_mid )
+				_upper = _mid - 1;
+			else if ( (*p) > *_mid )
+				_lower = _mid + 1;
+			else {
+				_trans += (unsigned int)(_mid - _keys);
+				goto _match;
+			}
+		}
+		_keys += _klen;
+		_trans += _klen;
+	}
+
+	_klen = _foo_range_lengths[cs];
+	if ( _klen > 0 ) {
+		const char *_lower = _keys;
+		const char *_mid;
+		const char *_upper = _keys + (_klen<<1) - 2;
+		while (1) {
+			if ( _upper < _lower )
+				break;
+
+			_mid = _lower + (((_upper-_lower) >> 1) & ~1);
+			if ( (*p) < _mid[0] )
+				_upper = _mid - 2;
+			else if ( (*p) > _mid[1] )
+				_lower = _mid + 2;
+			else {
+				_trans += (unsigned int)((_mid - _keys)>>1);
+				goto _match;
+			}
+		}
+		_trans += _klen;
+	}
+
+_match:
+	cs = _foo_trans_targs[_trans];
+
+	if ( _foo_trans_actions[_trans] == 0 )
+		goto _again;
+
+	_acts = _foo_actions + _foo_trans_actions[_trans];
+	_nacts = (unsigned int) *_acts++;
+	while ( _nacts-- > 0 )
+	{
+		switch ( *_acts++ )
+		{
+	case 0:
+#line 11 ".\\ansi_parser.rl"
+	{
+    start = p;
+  }
+	break;
+	case 1:
+#line 15 ".\\ansi_parser.rl"
+	{
+    auto [ptr, ec] = std::from_chars(start, p, value);
+    dbc::check(ec == std::errc(), "error in number parsing");
+    println("NUM: {}", value);
+  }
+	break;
+	case 2:
+#line 21 ".\\ansi_parser.rl"
+	{
+    println("COLOR256");
+  }
+	break;
+	case 3:
+#line 25 ".\\ansi_parser.rl"
+	{
+    println("COLOR24B");
+  }
+	break;
+	case 4:
+#line 29 ".\\ansi_parser.rl"
+	{
+    println("SINGLE");
+  }
+	break;
+	case 5:
+#line 33 ".\\ansi_parser.rl"
+	{
+    println("BASIC");
+  }
+	break;
+	case 6:
+#line 37 ".\\ansi_parser.rl"
+	{
+    println("BG");
+  }
+	break;
+	case 7:
+#line 41 ".\\ansi_parser.rl"
+	{
+    println("FG");
+  }
+	break;
+	case 8:
+#line 45 ".\\ansi_parser.rl"
+	{
+    println("ANY: {}:{}", int((*p)), (*p));
+  }
+	break;
+	case 9:
+#line 49 ".\\ansi_parser.rl"
+	{
+    println("START");
+  }
+	break;
+	case 10:
+#line 53 ".\\ansi_parser.rl"
+	{
+    println("END");
+  }
+	break;
+#line 243 ".\\ansi_parser.cpp"
+		}
+	}
+
+_again:
+	if ( cs == 0 )
+		goto _out;
+	if ( ++p != pe )
+		goto _resume;
+	_test_eof: {}
+	if ( p == eof )
+	{
+	const char *__acts = _foo_actions + _foo_eof_actions[cs];
+	unsigned int __nacts = (unsigned int) *__acts++;
+	while ( __nacts-- > 0 ) {
+		switch ( *__acts++ ) {
+	case 10:
+#line 53 ".\\ansi_parser.rl"
+	{
+    println("END");
+  }
+	break;
+#line 263 ".\\ansi_parser.cpp"
+		}
+	}
+	}
+
+	_out: {}
+	}
+
+#line 95 ".\\ansi_parser.rl"
+
+  print("PROCESSED {} CHARS of {}", p - codes.data(), codes.size());
+
+  return true;
+}

ansi_parser.hpp

@@ -0,0 +1,4 @@
+#pragma once
+#include <string_view>
+
+bool parse_ansi(std::string_view codes);

ansi_parser.rl

@@ -0,0 +1,99 @@
+#include <fmt/core.h>
+#include <string_view>
+#include <charconv>
+#include "dbc.hpp"
+
+using namespace fmt;
+
+%%{
+  machine foo;
+
+  action tstart {
+    start = fpc;
+  }
+
+  action number {
+    auto [ptr, ec] = std::from_chars(start, fpc, value);
+    dbc::check(ec == std::errc(), "error in number parsing");
+    println("NUM: {}", value);
+  }
+
+  action color256 {
+    println("COLOR256");
+  }
+
+  action color24b {
+    println("COLOR24B");
+  }
+
+  action colorSingle {
+    println("SINGLE");
+  }
+
+  action colorBasic {
+    println("BASIC");
+  }
+
+  action bg {
+    println("BG");
+  }
+
+  action fg {
+    println("FG");
+  }
+
+  action any {
+    println("ANY: {}:{}", int(fc), fc);
+  }
+
+  action start {
+    println("START");
+  }
+
+  action end {
+    println("END");
+  }
+
+  start = 0x1B "[";
+  fg = "38;" %fg;
+  bg = "48;" %bg;
+  num = digit+ >tstart %number;
+  color256 = "5;" num ";" num;
+  color24b = "2;" num ";" num ";" num;
+  basic = num ";" num;
+  single = num;
+
+  colorCode = (
+      start %start
+      (
+        (fg|bg) color256 %color256 |
+        (fg|bg) color24b %color24b |
+        single %colorSingle |
+        basic %colorBasic
+      )**
+      "m" %end
+  );
+
+  other = (any+ @any -- 0x1B)*;
+
+  main := (other :>> colorCode)**;
+}%%
+
+%% write data;
+
+bool parse_ansi(std::string_view codes) {
+  const char *start = NULL;
+  int cs = 0;
+  size_t value = 0;
+  const char *p = codes.data();
+  const char *pe = p + codes.size();
+  const char *eof = pe;
+
+
+  %% write init;
+  %% write exec;
+
+  print("PROCESSED {} CHARS of {}", p - codes.data(), codes.size());
+
+  return true;
+}

meson.build

@@ -19,13 +19,15 @@ runtests = executable('runtests', [
   'rand.cpp',
   'sound.cpp',
   'collider.cpp',
+  'ansi_parser.cpp',
   'render.cpp',
-  'tests/fsm.cpp',
-  'tests/dbc.cpp',
-  'tests/map.cpp',
-  'tests/collider.cpp',
-  'tests/sound.cpp',
-  'tests/dinkyecs.cpp',
+  #'tests/fsm.cpp',
+  #'tests/dbc.cpp',
+  #'tests/map.cpp',
+  #'tests/collider.cpp',
+  #'tests/sound.cpp',
+  #'tests/dinkyecs.cpp',
+  'tests/ansi_parser.cpp',
   ],
   dependencies: dependencies)
 

scratchpad/testragel.cpp

@@ -10,148 +10,121 @@
 using namespace fmt;
 
 
-#line 42 ".\\scratchpad\\testragel.rl"
+#line 66 ".\\scratchpad\\testragel.rl"
 
 
 
 #line 13 ".\\scratchpad\\testragel.cpp"
 static const char _foo_actions[] = {
-	0, 1, 0, 1, 1, 1, 2, 1, 
-	3, 1, 4, 2, 1, 5, 2, 1, 
-	6, 2, 1, 7, 2, 1, 8, 2, 
-	1, 9, 2, 1, 10
+	0, 1, 0, 1, 1, 1, 8, 1, 
+	9, 2, 1, 2, 2, 1, 3, 2, 
+	1, 4, 2, 1, 5, 2, 6, 0, 
+	2, 7, 0, 2, 8, 0
 };
 
 static const char _foo_key_offsets[] = {
-	0, 0, 1, 5, 7, 10, 15, 19, 
-	23, 27, 29, 32, 34, 37, 39, 42, 
-	46, 48, 51, 53, 56, 61, 65, 69, 
-	73, 75, 78, 80, 83, 85, 88, 92, 
-	94, 97, 99, 102
+	0, 0, 1, 6, 10, 12, 15, 20, 
+	24, 28, 32, 34, 37, 39, 42, 44, 
+	47, 51, 53, 56, 58, 61, 66, 70, 
+	74, 75
 };
 
 static const char _foo_trans_keys[] = {
-	91, 59, 109, 48, 57, 48, 57, 109, 
-	48, 57, 56, 59, 109, 48, 57, 59, 
-	109, 48, 57, 50, 53, 48, 57, 59, 
+	91, 51, 52, 109, 48, 57, 59, 109, 
+	48, 57, 48, 57, 109, 48, 57, 56, 
+	59, 109, 48, 57, 59, 109, 48, 57, 
+	50, 53, 48, 57, 59, 109, 48, 57, 
+	48, 57, 59, 48, 57, 48, 57, 59, 
+	48, 57, 48, 57, 109, 48, 57, 59, 
 	109, 48, 57, 48, 57, 59, 48, 57, 
-	48, 57, 59, 48, 57, 48, 57, 109, 
-	48, 57, 59, 109, 48, 57, 48, 57, 
-	59, 48, 57, 48, 57, 109, 48, 57, 
-	56, 59, 109, 48, 57, 59, 109, 48, 
-	57, 50, 53, 48, 57, 59, 109, 48, 
-	57, 48, 57, 59, 48, 57, 48, 57, 
-	59, 48, 57, 48, 57, 109, 48, 57, 
-	59, 109, 48, 57, 48, 57, 59, 48, 
-	57, 48, 57, 109, 48, 57, 27, 51, 
-	52, 48, 57, 0
+	48, 57, 109, 48, 57, 56, 59, 109, 
+	48, 57, 59, 109, 48, 57, 50, 53, 
+	48, 57, 27, 27, 0
 };
 
 static const char _foo_single_lengths[] = {
-	0, 1, 2, 0, 1, 3, 2, 2, 
-	2, 0, 1, 0, 1, 0, 1, 2, 
-	0, 1, 0, 1, 3, 2, 2, 2, 
-	0, 1, 0, 1, 0, 1, 2, 0, 
-	1, 0, 1, 3
+	0, 1, 3, 2, 0, 1, 3, 2, 
+	2, 2, 0, 1, 0, 1, 0, 1, 
+	2, 0, 1, 0, 1, 3, 2, 2, 
+	1, 1
 };
 
 static const char _foo_range_lengths[] = {
 	0, 0, 1, 1, 1, 1, 1, 1, 
 	1, 1, 1, 1, 1, 1, 1, 1, 
 	1, 1, 1, 1, 1, 1, 1, 1, 
-	1, 1, 1, 1, 1, 1, 1, 1, 
-	1, 1, 1, 1
+	0, 0
 };
 
-static const unsigned char _foo_index_offsets[] = {
-	0, 0, 2, 6, 8, 11, 16, 20, 
-	24, 28, 30, 33, 35, 38, 40, 43, 
-	47, 49, 52, 54, 57, 62, 66, 70, 
-	74, 76, 79, 81, 84, 86, 89, 93, 
-	95, 98, 100, 103
+static const char _foo_index_offsets[] = {
+	0, 0, 2, 7, 11, 13, 16, 21, 
+	25, 29, 33, 35, 38, 40, 43, 45, 
+	48, 52, 54, 57, 59, 62, 67, 71, 
+	75, 77
 };
 
-static const char _foo_trans_targs[] = {
-	35, 0, 3, 35, 2, 0, 4, 0, 
-	35, 4, 0, 6, 3, 35, 2, 0, 
-	7, 35, 2, 0, 8, 15, 4, 0, 
-	9, 35, 4, 0, 10, 0, 11, 10, 
-	0, 12, 0, 13, 12, 0, 14, 0, 
-	35, 14, 0, 16, 35, 4, 0, 17, 
-	0, 18, 17, 0, 19, 0, 35, 19, 
-	0, 21, 3, 35, 2, 0, 22, 35, 
-	2, 0, 23, 30, 4, 0, 24, 35, 
-	4, 0, 25, 0, 26, 25, 0, 27, 
-	0, 28, 27, 0, 29, 0, 35, 29, 
-	0, 31, 35, 4, 0, 32, 0, 33, 
-	32, 0, 34, 0, 35, 34, 0, 1, 
-	5, 20, 2, 0, 0
+static const char _foo_indicies[] = {
+	0, 1, 3, 4, 5, 2, 1, 7, 
+	8, 6, 1, 9, 1, 11, 10, 1, 
+	12, 7, 8, 6, 1, 13, 8, 6, 
+	1, 14, 15, 9, 1, 16, 11, 10, 
+	1, 17, 1, 19, 18, 1, 20, 1, 
+	22, 21, 1, 23, 1, 25, 24, 1, 
+	26, 11, 10, 1, 27, 1, 29, 28, 
+	1, 30, 1, 32, 31, 1, 33, 7, 
+	8, 6, 1, 34, 8, 6, 1, 35, 
+	36, 9, 1, 37, 1, 38, 1, 0
 };
 
-static const char _foo_trans_actions[] = {
-	9, 0, 3, 23, 0, 0, 1, 0, 
-	26, 0, 0, 0, 3, 23, 0, 0, 
-	3, 23, 0, 0, 1, 1, 1, 0, 
-	0, 26, 0, 0, 1, 0, 3, 0, 
-	0, 1, 0, 3, 0, 0, 1, 0, 
-	17, 0, 0, 0, 26, 0, 0, 1, 
-	0, 3, 0, 0, 1, 0, 11, 0, 
-	0, 0, 3, 23, 0, 0, 3, 23, 
-	0, 0, 1, 1, 1, 0, 0, 26, 
-	0, 0, 1, 0, 3, 0, 0, 1, 
-	0, 3, 0, 0, 1, 0, 20, 0, 
-	0, 0, 26, 0, 0, 1, 0, 3, 
-	0, 0, 1, 0, 14, 0, 0, 0, 
-	1, 1, 1, 0, 0
+static const char _foo_trans_targs[] = {
+	2, 0, 3, 6, 21, 25, 3, 4, 
+	25, 5, 5, 25, 7, 8, 9, 16, 
+	10, 11, 11, 12, 13, 13, 14, 15, 
+	15, 25, 17, 18, 18, 19, 20, 20, 
+	25, 22, 23, 9, 16, 1, 1
 };
 
-static const char _foo_to_state_actions[] = {
-	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 5
+static const char _foo_trans_actions[] = {
+	0, 0, 27, 27, 27, 5, 0, 3, 
+	15, 1, 0, 18, 0, 3, 24, 24, 
+	0, 1, 0, 3, 1, 0, 3, 1, 
+	0, 12, 0, 1, 0, 3, 1, 0, 
+	9, 0, 3, 21, 21, 0, 7
 };
 
-static const char _foo_from_state_actions[] = {
-	0, 0, 0, 0, 0, 0, 0, 0, 
+static const char _foo_eof_actions[] = {
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 7
+	0, 7
 };
 
-static const int foo_start = 35;
-static const int foo_first_final = 35;
+static const int foo_start = 24;
+static const int foo_first_final = 24;
 static const int foo_error = 0;
 
-static const int foo_en_main = 35;
+static const int foo_en_main = 24;
 
 
-#line 45 ".\\scratchpad\\testragel.rl"
+#line 69 ".\\scratchpad\\testragel.rl"
 
 void parse_ansi(std::string_view &codes) {
   const char *start = NULL;
   int cs = 0;
-  size_t act = 0;
+  size_t value = 0;
   const char *p = codes.data();
   const char *pe = p + codes.size();
-  const char *ts = p;
-  const char *te = pe;
   const char *eof = pe;
 
   
-#line 136 ".\\scratchpad\\testragel.cpp"
+#line 112 ".\\scratchpad\\testragel.cpp"
 	{
 	cs = foo_start;
-	ts = 0;
-	te = 0;
-	act = 0;
 	}
 
-#line 57 ".\\scratchpad\\testragel.rl"
+#line 79 ".\\scratchpad\\testragel.rl"
   
-#line 142 ".\\scratchpad\\testragel.cpp"
+#line 115 ".\\scratchpad\\testragel.cpp"
 	{
 	int _klen;
 	unsigned int _trans;
@@ -164,18 +137,6 @@ void parse_ansi(std::string_view &codes) {
 	if ( cs == 0 )
 		goto _out;
 _resume:
-	_acts = _foo_actions + _foo_from_state_actions[cs];
-	_nacts = (unsigned int) *_acts++;
-	while ( _nacts-- > 0 ) {
-		switch ( *_acts++ ) {
-	case 3:
-#line 1 "NONE"
-	{ts = p;}
-	break;
-#line 161 ".\\scratchpad\\testragel.cpp"
-		}
-	}
-
 	_keys = _foo_trans_keys + _foo_key_offsets[cs];
 	_trans = _foo_index_offsets[cs];
 
@@ -225,6 +186,7 @@ _resume:
 	}
 
 _match:
+	_trans = _foo_indicies[_trans];
 	cs = _foo_trans_targs[_trans];
 
 	if ( _foo_trans_actions[_trans] == 0 )
@@ -245,66 +207,84 @@ _match:
 	case 1:
 #line 17 ".\\scratchpad\\testragel.rl"
 	{
-    size_t value = 0;
     auto [ptr, ec] = std::from_chars(start, p, value);
     dbc::check(ec == std::errc(), "error in number parsing");
     println("NUMBER {}", value);
+  }
+	break;
+	case 2:
+#line 23 ".\\scratchpad\\testragel.rl"
+	{
+   println("256 color");
+  }
+	break;
+	case 3:
+#line 27 ".\\scratchpad\\testragel.rl"
+	{
+    println("true color");
   }
 	break;
 	case 4:
-#line 34 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("START"); }}
+#line 31 ".\\scratchpad\\testragel.rl"
+	{
+    println("single color");
+  }
 	break;
 	case 5:
 #line 35 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("fg 256 color"); }}
+	{
+    println("basic color");
+  }
 	break;
 	case 6:
-#line 36 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("bg 256 color"); }}
+#line 39 ".\\scratchpad\\testragel.rl"
+	{
+    println("BG");
+  }
 	break;
 	case 7:
-#line 37 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("fg true color"); }}
+#line 43 ".\\scratchpad\\testragel.rl"
+	{
+    println("FG");
+  }
 	break;
 	case 8:
-#line 38 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("bg true color"); }}
+#line 57 ".\\scratchpad\\testragel.rl"
+	{ println("START"); }
 	break;
 	case 9:
-#line 39 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("single"); }}
-	break;
-	case 10:
-#line 40 ".\\scratchpad\\testragel.rl"
-	{te = p+1;{ println("basic"); }}
+#line 64 ".\\scratchpad\\testragel.rl"
+	{ println("END"); }
 	break;
-#line 258 ".\\scratchpad\\testragel.cpp"
+#line 236 ".\\scratchpad\\testragel.cpp"
 		}
 	}
 
 _again:
-	_acts = _foo_actions + _foo_to_state_actions[cs];
-	_nacts = (unsigned int) *_acts++;
-	while ( _nacts-- > 0 ) {
-		switch ( *_acts++ ) {
-	case 2:
-#line 1 "NONE"
-	{ts = 0;}
-	break;
-#line 269 ".\\scratchpad\\testragel.cpp"
-		}
-	}
-
 	if ( cs == 0 )
 		goto _out;
 	if ( ++p != pe )
 		goto _resume;
 	_test_eof: {}
+	if ( p == eof )
+	{
+	const char *__acts = _foo_actions + _foo_eof_actions[cs];
+	unsigned int __nacts = (unsigned int) *__acts++;
+	while ( __nacts-- > 0 ) {
+		switch ( *__acts++ ) {
+	case 9:
+#line 64 ".\\scratchpad\\testragel.rl"
+	{ println("END"); }
+	break;
+#line 254 ".\\scratchpad\\testragel.cpp"
+		}
+	}
+	}
+
 	_out: {}
 	}
 
-#line 58 ".\\scratchpad\\testragel.rl"
+#line 80 ".\\scratchpad\\testragel.rl"
 }
 
 int main() {

scratchpad/testragel.rl

@@ -15,30 +15,54 @@ using namespace fmt;
   }
 
   action number {
-    size_t value = 0;
     auto [ptr, ec] = std::from_chars(start, fpc, value);
     dbc::check(ec == std::errc(), "error in number parsing");
     println("NUMBER {}", value);
   }
 
+  action color256 {
+   println("256 color");
+  }
+
+  action color24b {
+    println("true color");
+  }
+
+  action colorSingle {
+    println("single color");
+  }
+
+  action colorBasic {
+    println("basic color");
+  }
+
+  action bg {
+    println("BG");
+  }
+
+  action fg {
+    println("FG");
+  }
+
   start = 0x1B "[";
-  fg = "38;";
-  bg = "48;";
+  fg = "38;" %fg;
+  bg = "48;" %bg;
   num = digit+ >tstart %number;
   color256 = "5;" num ";" num;
   color24b = "2;" num ";" num ";" num;
   basic = num ";" num;
   single = num;
 
-  main := |*
-      start => { println("START"); };
-      fg color256 "m" => { println("fg 256 color"); };
-      bg color256 "m" => { println("bg 256 color"); };
-      fg color24b "m" => { println("fg true color"); };
-      bg color24b "m" => { println("bg true color"); };
-      single "m" => { println("single"); };
-      basic "m" => { println("basic"); };
-    *|;
+  main := (
+      start %{ println("START"); }
+      (
+        (fg|bg) color256 %color256 |
+        (fg|bg) color24b %color24b |
+        single %colorSingle |
+        basic %colorBasic
+      )**
+      "m" %{ println("END"); }
+    )**;
 }%%
 
 %% write data;
@@ -46,11 +70,9 @@ using namespace fmt;
 void parse_ansi(std::string_view &codes) {
   const char *start = NULL;
   int cs = 0;
-  size_t act = 0;
+  size_t value = 0;
   const char *p = codes.data();
   const char *pe = p + codes.size();
-  const char *ts = p;
-  const char *te = pe;
   const char *eof = pe;
 
   %% write init;

status.txt

@@ -14,6 +14,7 @@ A a(my_enum);
 
 TODO:
 
+* Actually render FTXUI ansi output instead of the gui.cpp hack.
 * Rewrite collider to return a real struct not tuple.
 * Write a test that generates a ton of maps then confirms there's a path from one room to every other room?
 * Lua integration?
@@ -21,5 +22,4 @@ TODO:
 * BUG: If map is < 90 zome out crashes.
 
 * Simple loot system.
-* Actually render FTXUI ansi output instead of the gui.cpp hack.
 * Bring back sounds, check out SoLoud.

tests/ansi_parser.cpp

@@ -0,0 +1,59 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <string>
+#include "ansi_parser.hpp"
+
+
+#include "ftxui/dom/elements.hpp"  // for text, bgcolor, color, vbox, hbox, separator, operator|, Elements, Element, Fit, border
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for Color, Color::Black, Color::Blue, Color::BlueLight, Color::Cyan, Color::CyanLight, Color::Default, Color::GrayDark, Color::GrayLight, Color::Green, Color::GreenLight, Color::Magenta, Color::MagentaLight, Color::Red, Color::RedLight, Color::White, Color::Yellow, Color::YellowLight, Color::Palette256, ftxui
+#include <ftxui/screen/color_info.hpp>  // for ColorInfo
+#include <ftxui/screen/screen.hpp>      // for Full, Screen
+#include <ftxui/screen/terminal.hpp>  // for ColorSupport, Color, Palette16, Palette256, TrueColor
+
+
+using namespace fmt;
+using namespace ftxui;
+
+std::string generate_colors() {
+  const int max_value = 255;
+  const int value_increment = 8;
+  const int hue_increment = 6;
+  int saturation = max_value;
+  Elements array;
+  int count = 0;
+
+  for (int value = 0; value < max_value; value += 2 * value_increment) {
+    Elements line;
+    for (int hue = 0; hue < max_value; hue += hue_increment) {
+      line.push_back(
+          text("#")                                    //
+          | color(Color::HSV(hue, saturation, value))  //
+          | bgcolor(Color::HSV(hue, saturation, value + value_increment)));
+      count++;
+    }
+    array.push_back(hbox(std::move(line)));
+    break; /// UNDO ME
+  }
+
+  println("MADE {} CHARS", count);
+
+  auto true_color_display = vbox({
+      vbox(std::move(array)),
+  });
+
+  auto document = vbox({hbox({
+      true_color_display,
+  })});
+
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  return screen.ToString();
+}
+
+TEST_CASE("test out ragel parser", "[gui]") {
+  std::string colors = generate_colors();
+
+  println("--- PARSING");
+  REQUIRE(parse_ansi(colors));
+}