Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 11 | /* Grammar subroutines needed by parser */ |
| 12 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 13 | #include "pgenheaders.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 14 | #include "assert.h" |
| 15 | #include "grammar.h" |
| 16 | #include "token.h" |
| 17 | |
| 18 | /* Return the DFA for the given type */ |
| 19 | |
| 20 | dfa * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame^] | 21 | PyGrammar_FindDFA(grammar *g, register int type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 22 | { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 23 | register dfa *d; |
Guido van Rossum | 6522eb0 | 1994-09-09 11:11:39 +0000 | [diff] [blame] | 24 | #if 1 |
| 25 | /* Massive speed-up */ |
| 26 | d = &g->g_dfa[type - NT_OFFSET]; |
| 27 | assert(d->d_type == type); |
| 28 | return d; |
| 29 | #else |
| 30 | /* Old, slow version */ |
| 31 | register int i; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 32 | |
| 33 | for (i = g->g_ndfas, d = g->g_dfa; --i >= 0; d++) { |
| 34 | if (d->d_type == type) |
| 35 | return d; |
| 36 | } |
| 37 | assert(0); |
| 38 | /* NOTREACHED */ |
Guido van Rossum | 6522eb0 | 1994-09-09 11:11:39 +0000 | [diff] [blame] | 39 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | char * |
Thomas Wouters | 23c9e00 | 2000-07-22 19:20:54 +0000 | [diff] [blame^] | 43 | PyGrammar_LabelRepr(label *lb) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 44 | { |
| 45 | static char buf[100]; |
| 46 | |
| 47 | if (lb->lb_type == ENDMARKER) |
| 48 | return "EMPTY"; |
| 49 | else if (ISNONTERMINAL(lb->lb_type)) { |
| 50 | if (lb->lb_str == NULL) { |
| 51 | sprintf(buf, "NT%d", lb->lb_type); |
| 52 | return buf; |
| 53 | } |
| 54 | else |
| 55 | return lb->lb_str; |
| 56 | } |
| 57 | else { |
| 58 | if (lb->lb_str == NULL) |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 59 | return _PyParser_TokenNames[lb->lb_type]; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 60 | else { |
| 61 | sprintf(buf, "%.32s(%.32s)", |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 62 | _PyParser_TokenNames[lb->lb_type], lb->lb_str); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 63 | return buf; |
| 64 | } |
| 65 | } |
| 66 | } |