projects / bison.git / blame
| Commit | Line | Data |
|---|---|---|
| 9f936c5e AD |
1 | /* Common parts between scan-code.l and scan-gram.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 2 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, write to the Free Software | |
| 19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 20 | 02110-1301 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #ifndef FLEX_PREFIX | |
| 24 | # error "FLEX_PREFIX not defined" | |
| 25 | #endif | |
| 26 | ||
| 9f936c5e AD |
27 | /* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */ |
| 28 | int FLEX_PREFIX (get_lineno) (void); | |
| 29 | FILE *FLEX_PREFIX (get_in) (void); | |
| 30 | FILE *FLEX_PREFIX (get_out) (void); | |
| 31 | int FLEX_PREFIX (get_leng) (void); | |
| 32 | char *FLEX_PREFIX (get_text) (void); | |
| 33 | void FLEX_PREFIX (set_lineno) (int); | |
| 34 | void FLEX_PREFIX (set_in) (FILE *); | |
| 35 | void FLEX_PREFIX (set_out) (FILE *); | |
| 36 | int FLEX_PREFIX (get_debug) (void); | |
| 37 | void FLEX_PREFIX (set_debug) (int); | |
| 38 | int FLEX_PREFIX (lex_destroy) (void); | |
| 39 | ||
| 40 | #define last_string FLEX_PREFIX (last_string) | |
| 41 | ||
| 42 | /* It seems to be a nice "feature" of Flex that one cannot use yytext, | |
| 43 | yyleng etc. when a prefix is given, since there is no longer a | |
| 44 | #define, but rather the token is actually changed in the output. | |
| 9e668899 JD |
45 | However, this is not true for Flex 2.5.4. */ |
| 46 | #ifndef yyleng | |
| 47 | # define yyleng FLEX_PREFIX (leng) | |
| 48 | #endif | |
| 49 | #ifndef yytext | |
| 3c40d0b5 | 50 | # define yytext FLEX_PREFIX (text) |
| 9e668899 | 51 | #endif |
| 9f936c5e AD |
52 | |
| 53 | /* OBSTACK_FOR_STRING -- Used to store all the characters that we need to | |
| 54 | keep (to construct ID, STRINGS etc.). Use the following macros to | |
| 55 | use it. | |
| 56 | ||
| 57 | Use STRING_GROW to append what has just been matched, and | |
| 58 | STRING_FINISH to end the string (it puts the ending 0). | |
| 59 | STRING_FINISH also stores this string in LAST_STRING, which can be | |
| 60 | used, and which is used by STRING_FREE to free the last string. */ | |
| 61 | ||
| 62 | static struct obstack obstack_for_string; | |
| 63 | ||
| 64 | #define STRING_GROW \ | |
| 65 | obstack_grow (&obstack_for_string, yytext, yyleng) | |
| 66 | ||
| 67 | #define STRING_FINISH \ | |
| 68 | do { \ | |
| 69 | obstack_1grow (&obstack_for_string, '\0'); \ | |
| 70 | last_string = obstack_finish (&obstack_for_string); \ | |
| 71 | } while (0) | |
| 72 | ||
| 73 | #define STRING_FREE \ | |
| f2e690d8 | 74 | obstack_free (&obstack_for_string, last_string) |