| Ying Wang | 0543663 | 2013-04-05 16:01:00 -0700 | [diff] [blame] | 1 | /* Common parts between scan-code.l, scan-gram.l, and scan-skel.l. |
| 2 | |
| 3 | Copyright (C) 2006, 2009-2012 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of Bison, the GNU Compiler Compiler. |
| 6 | |
| 7 | This program is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef FLEX_PREFIX |
| 21 | # error "FLEX_PREFIX not defined" |
| 22 | #endif |
| 23 | |
| 24 | /* Flex full version as a number. */ |
| 25 | #define FLEX_VERSION \ |
| 26 | ((YY_FLEX_MAJOR_VERSION) * 1000000 \ |
| 27 | + (YY_FLEX_MINOR_VERSION) * 1000 \ |
| 28 | + (YY_FLEX_SUBMINOR_VERSION)) |
| 29 | |
| 30 | /* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */ |
| 31 | # if FLEX_VERSION <= 2005031 |
| 32 | int FLEX_PREFIX (get_lineno) (void); |
| 33 | FILE *FLEX_PREFIX (get_in) (void); |
| 34 | FILE *FLEX_PREFIX (get_out) (void); |
| 35 | int FLEX_PREFIX (get_leng) (void); |
| 36 | char *FLEX_PREFIX (get_text) (void); |
| 37 | void FLEX_PREFIX (set_lineno) (int); |
| 38 | void FLEX_PREFIX (set_in) (FILE *); |
| 39 | void FLEX_PREFIX (set_out) (FILE *); |
| 40 | int FLEX_PREFIX (get_debug) (void); |
| 41 | void FLEX_PREFIX (set_debug) (int); |
| 42 | int FLEX_PREFIX (lex_destroy) (void); |
| 43 | #endif |
| 44 | |
| 45 | #define last_string FLEX_PREFIX (last_string) |
| 46 | |
| 47 | /* It seems to be a nice "feature" of Flex that one cannot use yytext, |
| 48 | yyleng etc. when a prefix is given, since there is no longer a |
| 49 | #define, but rather the token is actually changed in the output. |
| 50 | However, this is not true for Flex 2.5.4. */ |
| 51 | #ifndef yyleng |
| 52 | # define yyleng FLEX_PREFIX (leng) |
| 53 | #endif |
| 54 | #ifndef yytext |
| 55 | # define yytext FLEX_PREFIX (text) |
| 56 | #endif |
| 57 | |
| 58 | /* Non-reentrant scanners generated by Flex 2.5.9 and later (and some earlier |
| 59 | versions according to the Flex manual) leak memory if yylex_destroy is not |
| 60 | invoked. However, yylex_destroy is not defined before Flex 2.5.9, so give |
| 61 | an implementation here that at least appears to work with Flex 2.5.4. */ |
| 62 | #if FLEX_VERSION <= 2005009 |
| 63 | # define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER) |
| 64 | #endif |
| 65 | |
| 66 | /* OBSTACK_FOR_STRING -- Used to store all the characters that we need to |
| 67 | keep (to construct ID, STRINGS etc.). Use the following macros to |
| 68 | use it. |
| 69 | |
| 70 | Use STRING_GROW to append what has just been matched, and |
| 71 | STRING_FINISH to end the string (it puts the ending 0). |
| 72 | STRING_FINISH also stores this string in LAST_STRING, which can be |
| 73 | used, and which is used by STRING_FREE to free the last string. */ |
| 74 | |
| 75 | #ifndef FLEX_NO_OBSTACK |
| 76 | |
| 77 | static struct obstack obstack_for_string; |
| 78 | |
| 79 | # define STRING_GROW \ |
| 80 | obstack_grow (&obstack_for_string, yytext, yyleng) |
| 81 | |
| 82 | # define STRING_FINISH \ |
| 83 | do { \ |
| 84 | obstack_1grow (&obstack_for_string, '\0'); \ |
| 85 | last_string = obstack_finish (&obstack_for_string); \ |
| 86 | } while (0) |
| 87 | |
| 88 | # define STRING_FREE \ |
| 89 | obstack_free (&obstack_for_string, last_string) |
| 90 | |
| 91 | #endif |