language.c

   1 /*
   2  * Copyright (C) 2010 Joel Rosdahl
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the Free
   6  * Software Foundation; either version 3 of the License, or (at your option)
   7  * any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 51
  16  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "ccache.h"
  20
  21 /*
  22  * Supported file extensions and corresponding languages (as in parameter to
  23  * the -x option).
  24  */
  25 static const struct {
  26         const char *extension;
  27         const char *language;
  28 } extensions[] = {
  29         {".c",   "c"},
  30         {".C",   "c++"},
  31         {".cc",  "c++"},
  32         {".CC",  "c++"},
  33         {".cp",  "c++"},
  34         {".CP",  "c++"},
  35         {".cpp", "c++"},
  36         {".CPP", "c++"},
  37         {".cxx", "c++"},
  38         {".CXX", "c++"},
  39         {".c++", "c++"},
  40         {".C++", "c++"},
  41         {".m",   "objective-c"},
  42         {".M",   "objective-c++"},
  43         {".mm",  "objective-c++"},
  44         /* Preprocessed: */
  45         {".i",   "cpp-output"},
  46         {".ii",  "c++-cpp-output"},
  47         {".mi",  "objc-cpp-output"},
  48         {".mii", "objc++-cpp-output"},
  49         /* Header file (for precompilation): */
  50         {".h",   "c-header"},
  51         {".H",   "c++-header"},
  52         {".h++", "c++-header"},
  53         {".H++", "c++-header"},
  54         {".hh",  "c++-header"},
  55         {".HH",  "c++-header"},
  56         {".hp",  "c++-header"},
  57         {".HP",  "c++-header"},
  58         {".hpp", "c++-header"},
  59         {".HPP", "c++-header"},
  60         {".hxx", "c++-header"},
  61         {".HXX", "c++-header"},
  62         {".tcc", "c++-header"},
  63         {".TCC", "c++-header"},
  64         {NULL,  NULL}};
  65
  66 /*
  67  * Supported languages and corresponding preprocessed languages.
  68  */
  69 static const struct {
  70         const char *language;
  71         const char *p_language;
  72 } languages[] = {
  73         {"c",                    "cpp-output"},
  74         {"cpp-output",           "cpp-output"},
  75         {"c-header",             "cpp-output"},
  76         {"c++",                  "c++-cpp-output"},
  77         {"c++-cpp-output",       "c++-cpp-output"},
  78         {"c++-header",           "c++-cpp-output"},
  79         {"objective-c",          "objc-cpp-output"},
  80         {"objective-c-header",   "objc-cpp-output"},
  81         {"objc-cpp-output",      "objc-cpp-output"},
  82         {"objective-c++",        "objc++-cpp-output"},
  83         {"objc++-cpp-output",    "objc++-cpp-output"},
  84         {"objective-c++-header", "objc++-cpp-output"},
  85         {NULL,  NULL}};
  86
  87 /*
  88  * Guess the language of a file based on its extension. Returns NULL if the
  89  * extension is unknown.
  90  */
  91 const char *
  92 language_for_file(const char *fname)
  93 {
  94         int i;
  95         const char *p;
  96
  97         p = get_extension(fname);
  98         for (i = 0; extensions[i].extension; i++) {
  99                 if (str_eq(p, extensions[i].extension)) {
 100                         return extensions[i].language;
 101                 }
 102         }
 103         return NULL;
 104 }
 105
 106 /*
 107  * Return the preprocessed language for a given language, or NULL if unknown.
 108  */
 109 const char *
 110 p_language_for_language(const char *language)
 111 {
 112         int i;
 113
 114         if (!language) {
 115                 return NULL;
 116         }
 117         for (i = 0; languages[i].language; ++i) {
 118                 if (str_eq(language, languages[i].language)) {
 119                         return languages[i].p_language;
 120                 }
 121         }
 122         return NULL;
 123 }
 124
 125 /*
 126  * Return the default file extension (including dot) for a language, or NULL if
 127  * unknown.
 128  */
 129 const char *
 130 extension_for_language(const char *language)
 131 {
 132         int i;
 133
 134         if (!language) {
 135                 return NULL;
 136         }
 137         for (i = 0; extensions[i].extension; i++) {
 138                 if (str_eq(language, extensions[i].language)) {
 139                         return extensions[i].extension;
 140                 }
 141         }
 142         return NULL;
 143 }
 144
 145 bool
 146 language_is_supported(const char *language)
 147 {
 148         return p_language_for_language(language) != NULL;
 149 }
 150
 151 bool
 152 language_is_preprocessed(const char *language)
 153 {
 154         return str_eq(language, p_language_for_language(language));
 155 }