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.
This commit is contained in:
Zed A. Shaw
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a44a9a04f9
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f32b39afe2
9 changed files with 621 additions and 152 deletions
302
ansi_parser.cpp
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302
ansi_parser.cpp
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#line 1 ".\\ansi_parser.rl"
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#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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using namespace fmt;
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#line 80 ".\\ansi_parser.rl"
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#line 11 ".\\ansi_parser.cpp"
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static const char _foo_actions[] = {
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0, 1, 0, 1, 1, 1, 8, 1,
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9, 1, 10, 2, 1, 2, 2, 1,
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3, 2, 1, 4, 2, 1, 5, 2,
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6, 0, 2, 7, 0, 2, 9, 0,
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2, 10, 8
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};
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static const char _foo_key_offsets[] = {
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0, 0, 1, 2, 7, 11, 13, 16,
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21, 25, 29, 33, 35, 38, 40, 43,
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45, 48, 52, 54, 57, 59, 62, 67,
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71, 75, 76
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};
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static const char _foo_trans_keys[] = {
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27, 91, 51, 52, 109, 48, 57, 59,
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109, 48, 57, 48, 57, 109, 48, 57,
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56, 59, 109, 48, 57, 59, 109, 48,
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57, 50, 53, 48, 57, 59, 109, 48,
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57, 48, 57, 59, 48, 57, 48, 57,
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59, 48, 57, 48, 57, 109, 48, 57,
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59, 109, 48, 57, 48, 57, 59, 48,
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57, 48, 57, 109, 48, 57, 56, 59,
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109, 48, 57, 59, 109, 48, 57, 50,
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53, 48, 57, 27, 27, 0
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};
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static const char _foo_single_lengths[] = {
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0, 1, 1, 3, 2, 0, 1, 3,
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2, 2, 2, 0, 1, 0, 1, 0,
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1, 2, 0, 1, 0, 1, 3, 2,
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2, 1, 1
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};
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static const char _foo_range_lengths[] = {
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0, 0, 0, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 0, 0
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};
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static const char _foo_index_offsets[] = {
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0, 0, 2, 4, 9, 13, 15, 18,
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23, 27, 31, 35, 37, 40, 42, 45,
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47, 50, 54, 56, 59, 61, 64, 69,
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73, 77, 79
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};
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static const char _foo_trans_targs[] = {
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2, 1, 3, 0, 7, 22, 26, 4,
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0, 5, 26, 4, 0, 6, 0, 26,
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6, 0, 8, 5, 26, 4, 0, 9,
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26, 4, 0, 10, 17, 6, 0, 11,
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26, 6, 0, 12, 0, 13, 12, 0,
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14, 0, 15, 14, 0, 16, 0, 26,
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16, 0, 18, 26, 6, 0, 19, 0,
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20, 19, 0, 21, 0, 26, 21, 0,
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23, 5, 26, 4, 0, 24, 26, 4,
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0, 10, 17, 6, 0, 2, 1, 2,
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1, 0
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};
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static const char _foo_trans_actions[] = {
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0, 5, 0, 0, 29, 29, 7, 29,
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0, 3, 17, 0, 0, 1, 0, 20,
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0, 0, 0, 3, 17, 0, 0, 3,
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17, 0, 0, 26, 26, 1, 0, 0,
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20, 0, 0, 1, 0, 3, 0, 0,
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1, 0, 3, 0, 0, 1, 0, 14,
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0, 0, 0, 20, 0, 0, 1, 0,
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3, 0, 0, 1, 0, 11, 0, 0,
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0, 3, 17, 0, 0, 3, 17, 0,
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0, 23, 23, 1, 0, 0, 5, 9,
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32, 0
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};
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static const char _foo_eof_actions[] = {
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 9
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};
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static const int foo_start = 25;
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static const int foo_first_final = 25;
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static const int foo_error = 0;
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static const int foo_en_main = 25;
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#line 83 ".\\ansi_parser.rl"
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bool parse_ansi(std::string_view codes) {
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const char *start = NULL;
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int cs = 0;
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size_t 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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#line 111 ".\\ansi_parser.cpp"
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{
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cs = foo_start;
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}
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#line 94 ".\\ansi_parser.rl"
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#line 114 ".\\ansi_parser.cpp"
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{
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int _klen;
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unsigned int _trans;
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const char *_acts;
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unsigned int _nacts;
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const char *_keys;
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if ( p == pe )
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goto _test_eof;
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if ( cs == 0 )
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goto _out;
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_resume:
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_keys = _foo_trans_keys + _foo_key_offsets[cs];
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_trans = _foo_index_offsets[cs];
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_klen = _foo_single_lengths[cs];
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if ( _klen > 0 ) {
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const char *_lower = _keys;
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const char *_mid;
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const char *_upper = _keys + _klen - 1;
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while (1) {
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if ( _upper < _lower )
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break;
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_mid = _lower + ((_upper-_lower) >> 1);
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if ( (*p) < *_mid )
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_upper = _mid - 1;
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else if ( (*p) > *_mid )
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_lower = _mid + 1;
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else {
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_trans += (unsigned int)(_mid - _keys);
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goto _match;
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}
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}
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_keys += _klen;
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_trans += _klen;
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}
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_klen = _foo_range_lengths[cs];
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if ( _klen > 0 ) {
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const char *_lower = _keys;
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const char *_mid;
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const char *_upper = _keys + (_klen<<1) - 2;
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while (1) {
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if ( _upper < _lower )
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break;
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_mid = _lower + (((_upper-_lower) >> 1) & ~1);
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if ( (*p) < _mid[0] )
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_upper = _mid - 2;
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else if ( (*p) > _mid[1] )
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_lower = _mid + 2;
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else {
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_trans += (unsigned int)((_mid - _keys)>>1);
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goto _match;
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}
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}
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_trans += _klen;
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}
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_match:
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cs = _foo_trans_targs[_trans];
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if ( _foo_trans_actions[_trans] == 0 )
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goto _again;
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_acts = _foo_actions + _foo_trans_actions[_trans];
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_nacts = (unsigned int) *_acts++;
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while ( _nacts-- > 0 )
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{
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switch ( *_acts++ )
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{
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case 0:
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#line 11 ".\\ansi_parser.rl"
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{
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start = p;
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}
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break;
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case 1:
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#line 15 ".\\ansi_parser.rl"
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{
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auto [ptr, ec] = std::from_chars(start, p, value);
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dbc::check(ec == std::errc(), "error in number parsing");
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println("NUM: {}", value);
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}
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break;
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case 2:
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#line 21 ".\\ansi_parser.rl"
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{
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println("COLOR256");
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}
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break;
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case 3:
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#line 25 ".\\ansi_parser.rl"
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{
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println("COLOR24B");
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}
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break;
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case 4:
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#line 29 ".\\ansi_parser.rl"
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{
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println("SINGLE");
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}
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break;
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case 5:
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#line 33 ".\\ansi_parser.rl"
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{
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println("BASIC");
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}
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break;
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case 6:
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#line 37 ".\\ansi_parser.rl"
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{
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println("BG");
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}
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break;
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case 7:
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#line 41 ".\\ansi_parser.rl"
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{
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println("FG");
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}
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break;
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case 8:
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#line 45 ".\\ansi_parser.rl"
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{
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println("ANY: {}:{}", int((*p)), (*p));
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}
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break;
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case 9:
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#line 49 ".\\ansi_parser.rl"
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{
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println("START");
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}
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break;
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case 10:
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#line 53 ".\\ansi_parser.rl"
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{
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println("END");
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}
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break;
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#line 243 ".\\ansi_parser.cpp"
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}
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}
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_again:
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if ( cs == 0 )
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goto _out;
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if ( ++p != pe )
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goto _resume;
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_test_eof: {}
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if ( p == eof )
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{
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const char *__acts = _foo_actions + _foo_eof_actions[cs];
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unsigned int __nacts = (unsigned int) *__acts++;
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while ( __nacts-- > 0 ) {
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switch ( *__acts++ ) {
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case 10:
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#line 53 ".\\ansi_parser.rl"
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{
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println("END");
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}
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break;
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#line 263 ".\\ansi_parser.cpp"
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}
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}
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}
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_out: {}
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}
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#line 95 ".\\ansi_parser.rl"
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print("PROCESSED {} CHARS of {}", p - codes.data(), codes.size());
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return true;
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}
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