intl/log.c

   1 /* Log file output.
   2    Copyright (C) 2003, 2005 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU Library General Public License as published
   6    by the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17    USA.  */
  18
  19 /* Written by Bruno Haible <bruno@clisp.org>.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 /* Handle multi-threaded applications.  */
  30 #ifdef _LIBC
  31 # include <bits/libc-lock.h>
  32 #else
  33 # include "lock.h"
  34 #endif
  35
  36 /* Print an ASCII string with quotes and escape sequences where needed.  */
  37 static void
  38 print_escaped (FILE *stream, const char *str)
  39 {
  40   putc ('"', stream);
  41   for (; *str != '\0'; str++)
  42     if (*str == '\n')
  43       {
  44         fputs ("\\n\"", stream);
  45         if (str[1] == '\0')
  46           return;
  47         fputs ("\n\"", stream);
  48       }
  49     else
  50       {
  51         if (*str == '"' || *str == '\\')
  52           putc ('\\', stream);
  53         putc (*str, stream);
  54       }
  55   putc ('"', stream);
  56 }
  57
  58 static char *last_logfilename = NULL;
  59 static FILE *last_logfile = NULL;
  60 __libc_lock_define_initialized (static, lock)
  61
  62 static inline void
  63 _nl_log_untranslated_locked (const char *logfilename, const char *domainname,
  64                              const char *msgid1, const char *msgid2, int plural)
  65 {
  66   FILE *logfile;
  67
  68   /* Can we reuse the last opened logfile?  */
  69   if (last_logfilename == NULL || strcmp (logfilename, last_logfilename) != 0)
  70     {
  71       /* Close the last used logfile.  */
  72       if (last_logfilename != NULL)
  73         {
  74           if (last_logfile != NULL)
  75             {
  76               fclose (last_logfile);
  77               last_logfile = NULL;
  78             }
  79           free (last_logfilename);
  80           last_logfilename = NULL;
  81         }
  82       /* Open the logfile.  */
  83       last_logfilename = (char *) malloc (strlen (logfilename) + 1);
  84       if (last_logfilename == NULL)
  85         return;
  86       strcpy (last_logfilename, logfilename);
  87       last_logfile = fopen (logfilename, "a");
  88       if (last_logfile == NULL)
  89         return;
  90     }
  91   logfile = last_logfile;
  92
  93   fprintf (logfile, "domain ");
  94   print_escaped (logfile, domainname);
  95   fprintf (logfile, "\nmsgid ");
  96   print_escaped (logfile, msgid1);
  97   if (plural)
  98     {
  99       fprintf (logfile, "\nmsgid_plural ");
 100       print_escaped (logfile, msgid2);
 101       fprintf (logfile, "\nmsgstr[0] \"\"\n");
 102     }
 103   else
 104     fprintf (logfile, "\nmsgstr \"\"\n");
 105   putc ('\n', logfile);
 106 }
 107
 108 /* Add to the log file an entry denoting a failed translation.  */
 109 void
 110 _nl_log_untranslated (const char *logfilename, const char *domainname,
 111                       const char *msgid1, const char *msgid2, int plural)
 112 {
 113   __libc_lock_lock (lock);
 114   _nl_log_untranslated_locked (logfilename, domainname, msgid1, msgid2, plural);
 115   __libc_lock_unlock (lock);
 116 }