gnu/dist/gettext/gettext-tools/src/read-tcl.c

   1 /* Reading tcl/msgcat .msg files.
   2    Copyright (C) 2002-2003 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22 #include <alloca.h>
  23
  24 /* Specification.  */
  25 #include "read-tcl.h"
  26
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 #include "msgunfmt.h"
  32 #include "relocatable.h"
  33 #include "pathname.h"
  34 #include "sh-quote.h"
  35 #include "pipe.h"
  36 #include "wait-process.h"
  37 #include "read-po.h"
  38 #include "xallocsa.h"
  39 #include "error.h"
  40 #include "exit.h"
  41 #include "gettext.h"
  42
  43 #define _(str) gettext (str)
  44
  45
  46 /* A Tcl .msg file contains Tcl commands.  It is best interpreted by Tcl
  47    itself.  But we redirect the msgcat::mcset function so that it passes
  48    the msgid/msgstr pair to us, instead of storing it in the hash table.  */
  49
  50 msgdomain_list_ty *
  51 msgdomain_read_tcl (const char *locale_name, const char *directory)
  52 {
  53   const char *gettextdatadir;
  54   char *tclscript;
  55   size_t len;
  56   char *frobbed_locale_name;
  57   char *p;
  58   char *file_name;
  59   char *argv[4];
  60   pid_t child;
  61   int fd[1];
  62   FILE *fp;
  63   msgdomain_list_ty *mdlp;
  64   int exitstatus;
  65   size_t k;
  66
  67   /* Make it possible to override the msgunfmt.tcl location.  This is
  68      necessary for running the testsuite before "make install".  */
  69   gettextdatadir = getenv ("GETTEXTDATADIR");
  70   if (gettextdatadir == NULL || gettextdatadir[0] == '\0')
  71     gettextdatadir = relocate (GETTEXTDATADIR);
  72
  73   tclscript = concatenated_pathname (gettextdatadir, "msgunfmt.tcl", NULL);
  74
  75   /* Convert the locale name to lowercase and remove any encoding.  */
  76   len = strlen (locale_name);
  77   frobbed_locale_name = (char *) xallocsa (len + 1);
  78   memcpy (frobbed_locale_name, locale_name, len + 1);
  79   for (p = frobbed_locale_name; *p != '\0'; p++)
  80     if (*p >= 'A' && *p <= 'Z')
  81       *p = *p - 'A' + 'a';
  82     else if (*p == '.')
  83       {
  84         *p = '\0';
  85         break;
  86       }
  87
  88   file_name = concatenated_pathname (directory, frobbed_locale_name, ".msg");
  89
  90   freesa (frobbed_locale_name);
  91
  92   /* Prepare arguments.  */
  93   argv[0] = "tclsh";
  94   argv[1] = tclscript;
  95   argv[2] = file_name;
  96   argv[3] = NULL;
  97
  98   if (verbose)
  99     {
 100       char *command = shell_quote_argv (argv);
 101       printf ("%s\n", command);
 102       free (command);
 103     }
 104
 105   /* Open a pipe to the Tcl interpreter.  */
 106   child = create_pipe_in ("tclsh", "tclsh", argv, DEV_NULL, false, true, true,
 107                           fd);
 108
 109   fp = fdopen (fd[0], "r");
 110   if (fp == NULL)
 111     error (EXIT_FAILURE, errno, _("fdopen() failed"));
 112
 113   /* Read the message list.  */
 114   mdlp = read_po (fp, "(pipe)", "(pipe)");
 115
 116   fclose (fp);
 117
 118   /* Remove zombie process from process list, and retrieve exit status.  */
 119   exitstatus = wait_subprocess (child, "tclsh", false, false, true, true);
 120   if (exitstatus != 0)
 121     {
 122       if (exitstatus == 2)
 123         /* Special exitcode provided by msgunfmt.tcl.  */
 124         error (EXIT_FAILURE, ENOENT,
 125                _("error while opening \"%s\" for reading"), file_name);
 126       else
 127         error (EXIT_FAILURE, 0, _("%s subprocess failed with exit code %d"),
 128                "tclsh", exitstatus);
 129     }
 130
 131   free (tclscript);
 132
 133   /* Move the header entry to the beginning.  */
 134   for (k = 0; k < mdlp->nitems; k++)
 135     {
 136       message_list_ty *mlp = mdlp->item[k]->messages;
 137       size_t j;
 138
 139       for (j = 0; j < mlp->nitems; j++)
 140         if (mlp->item[j]->msgid[0] == '\0')
 141           {
 142             /* Found the header entry.  */
 143             if (j > 0)
 144               {
 145                 message_ty *header = mlp->item[j];
 146                 size_t i;
 147
 148                 for (i = j; i > 0; i--)
 149                   mlp->item[i] = mlp->item[i - 1];
 150                 mlp->item[0] = header;
 151               }
 152             break;
 153           }
 154     }
 155
 156   return mdlp;
 157 }