OLD | NEW |
(Empty) | |
| 1 /* Common parts between scan-code.l, scan-gram.l, and scan-skel.l. |
| 2 |
| 3 Copyright (C) 2006 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 /* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */ |
| 25 int FLEX_PREFIX (get_lineno) (void); |
| 26 FILE *FLEX_PREFIX (get_in) (void); |
| 27 FILE *FLEX_PREFIX (get_out) (void); |
| 28 int FLEX_PREFIX (get_leng) (void); |
| 29 char *FLEX_PREFIX (get_text) (void); |
| 30 void FLEX_PREFIX (set_lineno) (int); |
| 31 void FLEX_PREFIX (set_in) (FILE *); |
| 32 void FLEX_PREFIX (set_out) (FILE *); |
| 33 int FLEX_PREFIX (get_debug) (void); |
| 34 void FLEX_PREFIX (set_debug) (int); |
| 35 int FLEX_PREFIX (lex_destroy) (void); |
| 36 |
| 37 #define last_string FLEX_PREFIX (last_string) |
| 38 |
| 39 /* It seems to be a nice "feature" of Flex that one cannot use yytext, |
| 40 yyleng etc. when a prefix is given, since there is no longer a |
| 41 #define, but rather the token is actually changed in the output. |
| 42 However, this is not true for Flex 2.5.4. */ |
| 43 #ifndef yyleng |
| 44 # define yyleng FLEX_PREFIX (leng) |
| 45 #endif |
| 46 #ifndef yytext |
| 47 # define yytext FLEX_PREFIX (text) |
| 48 #endif |
| 49 |
| 50 /* Non-reentrant scanners generated by Flex 2.5.9 and later (and some earlier |
| 51 versions according to the Flex manual) leak memory if yylex_destroy is not |
| 52 invoked. However, yylex_destroy is not defined before Flex 2.5.9, so give |
| 53 an implementation here that at least appears to work with Flex 2.5.4. */ |
| 54 #if !defined(YY_FLEX_MAJOR_VERSION) || YY_FLEX_MAJOR_VERSION < 2 \ |
| 55 || (YY_FLEX_MAJOR_VERSION == 2 \ |
| 56 && (!defined(YY_FLEX_MINOR_VERSION) || YY_FLEX_MINOR_VERSION < 5 \ |
| 57 || (YY_FLEX_MINOR_VERSION == 5 \ |
| 58 && (!defined(YY_FLEX_SUBMINOR_VERSION) \ |
| 59 || YY_FLEX_SUBMINOR_VERSION < 9)))) |
| 60 # define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER) |
| 61 #endif |
| 62 |
| 63 /* OBSTACK_FOR_STRING -- Used to store all the characters that we need to |
| 64 keep (to construct ID, STRINGS etc.). Use the following macros to |
| 65 use it. |
| 66 |
| 67 Use STRING_GROW to append what has just been matched, and |
| 68 STRING_FINISH to end the string (it puts the ending 0). |
| 69 STRING_FINISH also stores this string in LAST_STRING, which can be |
| 70 used, and which is used by STRING_FREE to free the last string. */ |
| 71 |
| 72 #ifndef FLEX_NO_OBSTACK |
| 73 |
| 74 static struct obstack obstack_for_string; |
| 75 |
| 76 #define STRING_GROW \ |
| 77 obstack_grow (&obstack_for_string, yytext, yyleng) |
| 78 |
| 79 #define STRING_FINISH \ |
| 80 do { \ |
| 81 obstack_1grow (&obstack_for_string, '\0'); \ |
| 82 last_string = obstack_finish (&obstack_for_string); \ |
| 83 } while (0) |
| 84 |
| 85 #define STRING_FREE \ |
| 86 obstack_free (&obstack_for_string, last_string) |
| 87 |
| 88 #endif |
OLD | NEW |