| 1 | /* FriBidi |
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| 2 | * common.h - common include for library sources |
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| 3 | * |
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| 4 | * Author: |
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| 5 | * Behdad Esfahbod, 2004 |
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| 6 | * |
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| 7 | * Copyright (C) 2004 Sharif FarsiWeb, Inc. |
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| 8 | * |
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| 9 | * This library is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the GNU Lesser General Public |
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| 11 | * License as published by the Free Software Foundation; either |
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| 12 | * version 2.1 of the License, or (at your option) any later version. |
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| 13 | * |
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| 14 | * This library is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * Lesser General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU Lesser General Public License |
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| 20 | * along with this library, in a file named COPYING; if not, write to the |
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| 21 | * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA |
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| 23 | * |
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| 24 | * For licensing issues, contact <fribidi.license@gmail.com>. |
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| 25 | */ |
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| 26 | #ifndef _COMMON_H |
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| 27 | #define _COMMON_H |
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| 28 | |
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| 29 | #ifdef HAVE_CONFIG_H |
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| 30 | # include <config.h> |
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| 31 | #endif |
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| 32 | |
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| 33 | #include <fribidi-common.h> |
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| 34 | |
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| 35 | #ifndef false |
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| 36 | # define false (0) |
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| 37 | # endif /* !false */ |
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| 38 | # ifndef true |
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| 39 | # define true (!false) |
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| 40 | # endif /* !true */ |
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| 41 | |
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| 42 | #ifndef NULL |
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| 43 | # ifdef __cplusplus |
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| 44 | # define NULL (0L) |
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| 45 | # else /* !__cplusplus */ |
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| 46 | # define NULL ((void*) 0) |
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| 47 | # endif /* !__cplusplus */ |
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| 48 | #endif /* !NULL */ |
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| 49 | |
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| 50 | /* fribidi_malloc and fribidi_free should be used instead of malloc and free. |
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| 51 | * No need to include any headers. */ |
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| 52 | #ifndef fribidi_malloc |
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| 53 | # if HAVE_STDLIB_H |
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| 54 | # ifndef __FRIBIDI_DOC |
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| 55 | # include <stdlib.h> |
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| 56 | # endif /* __FRIBIDI_DOC */ |
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| 57 | # define fribidi_malloc malloc |
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| 58 | # else /* !HAVE_STDLIB_H */ |
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| 59 | # define fribidi_malloc (void *) malloc |
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| 60 | # endif /* !HAVE_STDLIB_H */ |
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| 61 | # define fribidi_free free |
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| 62 | #else /* fribidi_malloc */ |
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| 63 | # ifndef fribidi_free |
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| 64 | # error "You should define fribidi_free too when you define fribidi_malloc." |
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| 65 | # endif /* !fribidi_free */ |
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| 66 | #endif /* fribidi_malloc */ |
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| 67 | |
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| 68 | #ifdef HAVE_STRING_H |
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| 69 | # if !STDC_HEADERS && HAVE_MEMORY_H |
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| 70 | # include <memory.h> |
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| 71 | # endif |
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| 72 | # include <string.h> |
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| 73 | #endif |
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| 74 | #ifdef HAVE_STRINGS_H |
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| 75 | # include <strings.h> |
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| 76 | #endif |
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| 77 | |
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| 78 | /* FRIBIDI_BEGIN_STMT should be used at the beginning of your macro |
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| 79 | * definitions that are to behave like simple statements. Use |
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| 80 | * FRIBIDI_END_STMT at the end of the macro after the semicolon or brace. */ |
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| 81 | #ifndef FRIBIDI_BEGIN_STMT |
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| 82 | # define FRIBIDI_BEGIN_STMT do { |
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| 83 | # define FRIBIDI_END_STMT } while (0) |
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| 84 | #endif /* !FRIBIDI_BEGIN_STMT */ |
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| 85 | |
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| 86 | /* LIKEYLY and UNLIKELY are used to give a hint on branch prediction to the |
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| 87 | * compiler. */ |
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| 88 | #ifndef LIKELY |
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| 89 | # if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) |
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| 90 | # define FRIBIDI_BOOLEAN_EXPR(expr) \ |
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| 91 | __extension__ ({ \ |
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| 92 | int fribidi_bool_var; \ |
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| 93 | if (expr) \ |
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| 94 | fribidi_bool_var = 1; \ |
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| 95 | else \ |
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| 96 | fribidi_bool_var = 0; \ |
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| 97 | fribidi_bool_var; \ |
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| 98 | }) |
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| 99 | # define LIKELY(expr) (__builtin_expect (FRIBIDI_BOOLEAN_EXPR(expr), 1)) |
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| 100 | # define UNLIKELY(expr) (__builtin_expect (FRIBIDI_BOOLEAN_EXPR(expr), 0)) |
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| 101 | # else |
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| 102 | # define LIKELY |
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| 103 | # define UNLIKELY |
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| 104 | # endif /* _GNUC_ */ |
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| 105 | #endif /* !LIKELY */ |
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| 106 | |
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| 107 | #ifndef FRIBIDI_EMPTY_STMT |
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| 108 | # define FRIBIDI_EMPTY_STMT FRIBIDI_BEGIN_STMT (void) 0; FRIBIDI_END_STMT |
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| 109 | #endif /* !FRIBIDI_EMPTY_STMT */ |
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| 110 | |
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| 111 | #ifdef HAVE_STRINGIZE |
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| 112 | # define STRINGIZE(symbol) #symbol |
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| 113 | #else /* !HAVE_STRINGIZE */ |
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| 114 | # error "No stringize operator available?" |
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| 115 | #endif /* !HAVE_STRINGIZE */ |
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| 116 | |
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| 117 | /* As per recommendation of GNU Coding Standards. */ |
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| 118 | #ifndef _GNU_SOURCE |
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| 119 | # define _GNU_SOURCE |
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| 120 | #endif /* !_GNU_SOURCE */ |
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| 121 | |
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| 122 | /* We respect our own rules. */ |
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| 123 | #ifndef FRIBIDI_NO_DEPRECATED |
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| 124 | # define FRIBIDI_NO_DEPRECATED |
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| 125 | #endif /* !FRIBIDI_NO_DEPRECATED */ |
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| 126 | |
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| 127 | |
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| 128 | #include "debug.h" |
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| 129 | |
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| 130 | #endif /* !_COMMON_H */ |
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| 131 | /* Editor directions: |
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| 132 | * vim:textwidth=78:tabstop=8:shiftwidth=2:autoindent:cindent |
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| 133 | */ |
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| 134 | |
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