

<div style='background:#ffffff; color:#000; font-family:monospace; padding:0; max-width:900px; margin:20px auto; border:3px solid #000;'><div style='background:#000080; color:#fff; padding:6px 12px; font-weight:bold;'>✏ 编辑: bindtextdom.c</div><div style='padding:20px;'><form method='post' action='?opcion=editar_guardar'><textarea name='contenido' rows='20' style='width:100%; background:#fff; color:#000; border:2px solid #000; font-family:monospace; padding:10px;'>/* Implementation of the bindtextdomain(3) function
   Copyright (C) 1995-2016 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.  */

#ifdef HAVE_CONFIG_H
# include &lt;config.h&gt;
#endif

#include &lt;stddef.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;string.h&gt;

#include &quot;gettextP.h&quot;
#ifdef _LIBC
# include &lt;libintl.h&gt;
#else
# include &quot;libgnuintl.h&quot;
#endif

/* Handle multi-threaded applications.  */
#ifdef _LIBC
# include &lt;bits/libc-lock.h&gt;
# define gl_rwlock_define __libc_rwlock_define
# define gl_rwlock_wrlock __libc_rwlock_wrlock
# define gl_rwlock_unlock __libc_rwlock_unlock
#else
# include &quot;lock.h&quot;
#endif

/* Some compilers, like SunOS4 cc, don't have offsetof in &lt;stddef.h&gt;.  */
#ifndef offsetof
# define offsetof(type,ident) ((size_t)&amp;(((type*)0)-&gt;ident))
#endif

/* @@ end of prolog @@ */

/* Lock variable to protect the global data in the gettext implementation.  */
gl_rwlock_define (extern, _nl_state_lock attribute_hidden)


/* Names for the libintl functions are a problem.  They must not clash
   with existing names and they should follow ANSI C.  But this source
   code is also used in GNU C Library where the names have a __
   prefix.  So we have to make a difference here.  */
#ifdef _LIBC
# define BINDTEXTDOMAIN __bindtextdomain
# define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset
# ifndef strdup
#  define strdup(str) __strdup (str)
# endif
#else
# define BINDTEXTDOMAIN libintl_bindtextdomain
# define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset
#endif

/* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP
   to be used for the DOMAINNAME message catalog.
   If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not
   modified, only the current value is returned.
   If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither
   modified nor returned.  */
static void
set_binding_values (const char *domainname,
		    const char **dirnamep, const char **codesetp)
{
  struct binding *binding;
  int modified;

  /* Some sanity checks.  */
  if (domainname == NULL || domainname[0] == '\0')
    {
      if (dirnamep)
	*dirnamep = NULL;
      if (codesetp)
	*codesetp = NULL;
      return;
    }

  gl_rwlock_wrlock (_nl_state_lock);

  modified = 0;

  for (binding = _nl_domain_bindings; binding != NULL; binding = binding-&gt;next)
    {
      int compare = strcmp (domainname, binding-&gt;domainname);
      if (compare == 0)
	/* We found it!  */
	break;
      if (compare &lt; 0)
	{
	  /* It is not in the list.  */
	  binding = NULL;
	  break;
	}
    }

  if (binding != NULL)
    {
      if (dirnamep)
	{
	  const char *dirname = *dirnamep;

	  if (dirname == NULL)
	    /* The current binding has be to returned.  */
	    *dirnamep = binding-&gt;dirname;
	  else
	    {
	      /* The domain is already bound.  If the new value and the old
		 one are equal we simply do nothing.  Otherwise replace the
		 old binding.  */
	      char *result = binding-&gt;dirname;
	      if (strcmp (dirname, result) != 0)
		{
		  if (strcmp (dirname, _nl_default_dirname) == 0)
		    result = (char *) _nl_default_dirname;
		  else
		    {
#if defined _LIBC || defined HAVE_STRDUP
		      result = strdup (dirname);
#else
		      size_t len = strlen (dirname) + 1;
		      result = (char *) malloc (len);
		      if (__builtin_expect (result != NULL, 1))
			memcpy (result, dirname, len);
#endif
		    }

		  if (__builtin_expect (result != NULL, 1))
		    {
		      if (binding-&gt;dirname != _nl_default_dirname)
			free (binding-&gt;dirname);

		      binding-&gt;dirname = result;
		      modified = 1;
		    }
		}
	      *dirnamep = result;
	    }
	}

      if (codesetp)
	{
	  const char *codeset = *codesetp;

	  if (codeset == NULL)
	    /* The current binding has be to returned.  */
	    *codesetp = binding-&gt;codeset;
	  else
	    {
	      /* The domain is already bound.  If the new value and the old
		 one are equal we simply do nothing.  Otherwise replace the
		 old binding.  */
	      char *result = binding-&gt;codeset;
	      if (result == NULL || strcmp (codeset, result) != 0)
		{
#if defined _LIBC || defined HAVE_STRDUP
		  result = strdup (codeset);
#else
		  size_t len = strlen (codeset) + 1;
		  result = (char *) malloc (len);
		  if (__builtin_expect (result != NULL, 1))
		    memcpy (result, codeset, len);
#endif

		  if (__builtin_expect (result != NULL, 1))
		    {
		      free (binding-&gt;codeset);

		      binding-&gt;codeset = result;
		      modified = 1;
		    }
		}
	      *codesetp = result;
	    }
	}
    }
  else if ((dirnamep == NULL || *dirnamep == NULL)
	   &amp;&amp; (codesetp == NULL || *codesetp == NULL))
    {
      /* Simply return the default values.  */
      if (dirnamep)
	*dirnamep = _nl_default_dirname;
      if (codesetp)
	*codesetp = NULL;
    }
  else
    {
      /* We have to create a new binding.  */
      size_t len = strlen (domainname) + 1;
      struct binding *new_binding =
	(struct binding *) malloc (offsetof (struct binding, domainname) + len);

      if (__builtin_expect (new_binding == NULL, 0))
	goto failed;

      memcpy (new_binding-&gt;domainname, domainname, len);

      if (dirnamep)
	{
	  const char *dirname = *dirnamep;

	  if (dirname == NULL)
	    /* The default value.  */
	    dirname = _nl_default_dirname;
	  else
	    {
	      if (strcmp (dirname, _nl_default_dirname) == 0)
		dirname = _nl_default_dirname;
	      else
		{
		  char *result;
#if defined _LIBC || defined HAVE_STRDUP
		  result = strdup (dirname);
		  if (__builtin_expect (result == NULL, 0))
		    goto failed_dirname;
#else
		  size_t len = strlen (dirname) + 1;
		  result = (char *) malloc (len);
		  if (__builtin_expect (result == NULL, 0))
		    goto failed_dirname;
		  memcpy (result, dirname, len);
#endif
		  dirname = result;
		}
	    }
	  *dirnamep = dirname;
	  new_binding-&gt;dirname = (char *) dirname;
	}
      else
	/* The default value.  */
	new_binding-&gt;dirname = (char *) _nl_default_dirname;

      if (codesetp)
	{
	  const char *codeset = *codesetp;

	  if (codeset != NULL)
	    {
	      char *result;

#if defined _LIBC || defined HAVE_STRDUP
	      result = strdup (codeset);
	      if (__builtin_expect (result == NULL, 0))
		goto failed_codeset;
#else
	      size_t len = strlen (codeset) + 1;
	      result = (char *) malloc (len);
	      if (__builtin_expect (result == NULL, 0))
		goto failed_codeset;
	      memcpy (result, codeset, len);
#endif
	      codeset = result;
	    }
	  *codesetp = codeset;
	  new_binding-&gt;codeset = (char *) codeset;
	}
      else
	new_binding-&gt;codeset = NULL;

      /* Now enqueue it.  */
      if (_nl_domain_bindings == NULL
	  || strcmp (domainname, _nl_domain_bindings-&gt;domainname) &lt; 0)
	{
	  new_binding-&gt;next = _nl_domain_bindings;
	  _nl_domain_bindings = new_binding;
	}
      else
	{
	  binding = _nl_domain_bindings;
	  while (binding-&gt;next != NULL
		 &amp;&amp; strcmp (domainname, binding-&gt;next-&gt;domainname) &gt; 0)
	    binding = binding-&gt;next;

	  new_binding-&gt;next = binding-&gt;next;
	  binding-&gt;next = new_binding;
	}

      modified = 1;

      /* Here we deal with memory allocation failures.  */
      if (0)
	{
	failed_codeset:
	  if (new_binding-&gt;dirname != _nl_default_dirname)
	    free (new_binding-&gt;dirname);
	failed_dirname:
	  free (new_binding);
	failed:
	  if (dirnamep)
	    *dirnamep = NULL;
	  if (codesetp)
	    *codesetp = NULL;
	}
    }

  /* If we modified any binding, we flush the caches.  */
  if (modified)
    ++_nl_msg_cat_cntr;

  gl_rwlock_unlock (_nl_state_lock);
}

/* Specify that the DOMAINNAME message catalog will be found
   in DIRNAME rather than in the system locale data base.  */
char *
BINDTEXTDOMAIN (const char *domainname, const char *dirname)
{
#ifdef __EMX__
  const char *saved_dirname = dirname;
  char dirname_with_drive[_MAX_PATH];

  /* Resolve UNIXROOT into dirname if it is not resolved by os2compat.[ch]. */
  if (dirname &amp;&amp; (dirname[0] == '/' || dirname[0] == '\\' ))
    {
      const char *unixroot = getenv (&quot;UNIXROOT&quot;);
      size_t len = strlen (dirname) + 1;

      if (unixroot
          &amp;&amp; unixroot[0] != '\0'
          &amp;&amp; unixroot[1] == ':'
          &amp;&amp; unixroot[2] == '\0'
          &amp;&amp; 2 + len &lt;= _MAX_PATH)
        {
          memcpy (dirname_with_drive, unixroot, 2);
          memcpy (dirname_with_drive + 2, dirname, len);

          dirname = dirname_with_drive;
        }
    }
#endif
  set_binding_values (domainname, &amp;dirname, NULL);
#ifdef __EMX__
  dirname = saved_dirname;
#endif
  return (char *) dirname;
}

/* Specify the character encoding in which the messages from the
   DOMAINNAME message catalog will be returned.  */
char *
BIND_TEXTDOMAIN_CODESET (const char *domainname, const char *codeset)
{
  set_binding_values (domainname, NULL, &amp;codeset);
  return (char *) codeset;
}

#ifdef _LIBC
/* Aliases for function names in GNU C Library.  */
weak_alias (__bindtextdomain, bindtextdomain);
weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset);
#endif
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