Barry Warsaw | 5947af5 | 2001-11-28 21:34:34 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2 | /* Grammar subroutines needed by parser */ |
| 3 | |
Tim Peters | 1ca1296 | 2001-12-04 03:18:48 +0000 | [diff] [blame] | 4 | #include "Python.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 5 | #include "grammar.h" |
| 6 | #include "token.h" |
| 7 | |
| 8 | /* Return the DFA for the given type */ |
| 9 | |
Inada Naoki | 09415ff | 2019-04-23 20:39:37 +0900 | [diff] [blame] | 10 | const dfa * |
Antoine Pitrou | 9ed5f27 | 2013-08-13 20:18:52 +0200 | [diff] [blame] | 11 | PyGrammar_FindDFA(grammar *g, int type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 12 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 13 | /* Massive speed-up */ |
Inada Naoki | 09415ff | 2019-04-23 20:39:37 +0900 | [diff] [blame] | 14 | const dfa *d = &g->g_dfa[type - NT_OFFSET]; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 15 | assert(d->d_type == type); |
| 16 | return d; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 17 | } |
| 18 | |
Benjamin Peterson | 742b2f8 | 2012-10-31 13:36:13 -0400 | [diff] [blame] | 19 | const char * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame] | 20 | PyGrammar_LabelRepr(label *lb) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 21 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 22 | static char buf[100]; |
| 23 | |
| 24 | if (lb->lb_type == ENDMARKER) |
| 25 | return "EMPTY"; |
| 26 | else if (ISNONTERMINAL(lb->lb_type)) { |
| 27 | if (lb->lb_str == NULL) { |
| 28 | PyOS_snprintf(buf, sizeof(buf), "NT%d", lb->lb_type); |
| 29 | return buf; |
| 30 | } |
| 31 | else |
| 32 | return lb->lb_str; |
| 33 | } |
Christian Heimes | 53d2dc4 | 2013-07-22 10:30:14 +0200 | [diff] [blame] | 34 | else if (lb->lb_type < N_TOKENS) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 35 | if (lb->lb_str == NULL) |
| 36 | return _PyParser_TokenNames[lb->lb_type]; |
| 37 | else { |
| 38 | PyOS_snprintf(buf, sizeof(buf), "%.32s(%.32s)", |
| 39 | _PyParser_TokenNames[lb->lb_type], lb->lb_str); |
| 40 | return buf; |
| 41 | } |
| 42 | } |
Christian Heimes | 53d2dc4 | 2013-07-22 10:30:14 +0200 | [diff] [blame] | 43 | else { |
| 44 | Py_FatalError("invalid label"); |
Christian Heimes | 1eb0cb1 | 2013-07-22 16:34:13 +0200 | [diff] [blame] | 45 | return NULL; |
Christian Heimes | 53d2dc4 | 2013-07-22 10:30:14 +0200 | [diff] [blame] | 46 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 47 | } |