gettext.h

   1 /*
   2  * Copyright (c) 2010-2011 Ævar Arnfjörð Bjarmason
   3  *
   4  * This is a skeleton no-op implementation of gettext for Git.
   5  * You can replace it with something that uses libintl.h and wraps
   6  * gettext() to try out the translations.
   7  */
   8
   9 #ifndef GETTEXT_H
  10 #define GETTEXT_H
  11
  12 #if defined(_) || defined(Q_)
  13 #error "namespace conflict: '_' or 'Q_' is pre-defined?"
  14 #endif
  15
  16 #ifndef NO_GETTEXT
  17 #       include <libintl.h>
  18 #else
  19 #       ifdef gettext
  20 #               undef gettext
  21 #       endif
  22 #       define gettext(s) (s)
  23 #       ifdef ngettext
  24 #               undef ngettext
  25 #       endif
  26 #       define ngettext(s, p, n) ((n == 1) ? (s) : (p))
  27 #endif
  28
  29 #define FORMAT_PRESERVING(n) __attribute__((format_arg(n)))
  30
  31 #ifndef NO_GETTEXT
  32 extern int git_gettext_enabled;
  33 void git_setup_gettext(void);
  34 int gettext_width(const char *s);
  35 #else
  36 #define git_gettext_enabled (0)
  37 static inline void git_setup_gettext(void)
  38 {
  39 }
  40 static inline int gettext_width(const char *s)
  41 {
  42         return strlen(s);
  43 }
  44 #endif
  45
  46 static inline FORMAT_PRESERVING(1) const char *_(const char *msgid)
  47 {
  48         if (!*msgid)
  49                 return "";
  50         if (!git_gettext_enabled)
  51                 return msgid;
  52         return gettext(msgid);
  53 }
  54
  55 static inline FORMAT_PRESERVING(1) FORMAT_PRESERVING(2)
  56 const char *Q_(const char *msgid, const char *plu, unsigned long n)
  57 {
  58         if (!git_gettext_enabled)
  59                 return n == 1 ? msgid : plu;
  60         return ngettext(msgid, plu, n);
  61 }
  62
  63 /* Mark msgid for translation but do not translate it. */
  64 #if !USE_PARENS_AROUND_GETTEXT_N
  65 #define N_(msgid) msgid
  66 #else
  67 /*
  68  * Strictly speaking, this will lead to invalid C when
  69  * used this way:
  70  *      static const char s[] = N_("FOO");
  71  * which will expand to
  72  *      static const char s[] = ("FOO");
  73  * and in valid C, the initializer on the right hand side must
  74  * be without the parentheses.  But many compilers do accept it
  75  * as a language extension and it will allow us to catch mistakes
  76  * like:
  77  *      static const char *msgs[] = {
  78  *              N_("one")
  79  *              N_("two"),
  80  *              N_("three"),
  81  *              NULL
  82  *      };
  83  * (notice the missing comma on one of the lines) by forcing
  84  * a compilation error, because parenthesised ("one") ("two")
  85  * will not get silently turned into ("onetwo").
  86  */
  87 #define N_(msgid) (msgid)
  88 #endif
  89
  90 const char *get_preferred_languages(void);
  91 int is_utf8_locale(void);
  92
  93 #endif