dcigettext.c

让你在linux命令行下轻松支持中文显示和中文输入

		goto resize_freemem;

	      res = __gconv (domain->conv,
			     &inbuf, inbuf + resultlen,
			     &outbuf,
			     outbuf + freemem_size - sizeof (size_t),
			     &non_reversible);

	      if (res == __GCONV_OK || res == __GCONV_EMPTY_INPUT)
		break;

	      if (res != __GCONV_FULL_OUTPUT)
		{
		  __libc_lock_unlock (lock);
		  goto converted;
		}

	      inbuf = result;
# else
#  if HAVE_ICONV
	      const char *inptr = (const char *) inbuf;
	      size_t inleft = resultlen;
	      char *outptr = (char *) outbuf;
	      size_t outleft;

	      if (freemem_size < sizeof (size_t))
		goto resize_freemem;

	      outleft = freemem_size - sizeof (size_t);
	      if (iconv (domain->conv,
			 (ICONV_CONST char **) &inptr, &inleft,
			 &outptr, &outleft)
		  != (size_t) (-1))
		{
		  outbuf = (unsigned char *) outptr;
		  break;
		}
	      if (errno != E2BIG)
		{
		  __libc_lock_unlock (lock);
		  goto converted;
		}
#  endif
# endif

	    resize_freemem:
	      /* We must allocate a new buffer or resize the old one.  */
	      if (malloc_count > 0)
		{
		  ++malloc_count;
		  freemem_size = malloc_count * INITIAL_BLOCK_SIZE;
		  newmem = (transmem_block_t *) realloc (transmem_list,
							 freemem_size);
# ifdef _LIBC
		  if (newmem != NULL)
		    transmem_list = transmem_list->next;
		  else
		    {
		      struct transmem_list *old = transmem_list;

		      transmem_list = transmem_list->next;
		      free (old);
		    }
# endif
		}
	      else
		{
		  malloc_count = 1;
		  freemem_size = INITIAL_BLOCK_SIZE;
		  newmem = (transmem_block_t *) malloc (freemem_size);
		}
	      if (__builtin_expect (newmem == NULL, 0))
		{
		  freemem = NULL;
		  freemem_size = 0;
		  __libc_lock_unlock (lock);
		  goto converted;
		}

# ifdef _LIBC
	      /* Add the block to the list of blocks we have to free
                 at some point.  */
	      newmem->next = transmem_list;
	      transmem_list = newmem;

	      freemem = newmem->data;
	      freemem_size -= offsetof (struct transmem_list, data);
# else
	      transmem_list = newmem;
	      freemem = newmem;
# endif

	      outbuf = freemem + sizeof (size_t);
	    }

	  /* We have now in our buffer a converted string.  Put this
	     into the table of conversions.  */
	  *(size_t *) freemem = outbuf - freemem - sizeof (size_t);
	  domain->conv_tab[act] = (char *) freemem;
	  /* Shrink freemem, but keep it aligned.  */
	  freemem_size -= outbuf - freemem;
	  freemem = outbuf;
	  freemem += freemem_size & (alignof (size_t) - 1);
	  freemem_size = freemem_size & ~ (alignof (size_t) - 1);

	  __libc_lock_unlock (lock);
	}

      /* Now domain->conv_tab[act] contains the translation of all
	 the plural variants.  */
      result = domain->conv_tab[act] + sizeof (size_t);
      resultlen = *(size_t *) domain->conv_tab[act];
    }

 converted:
  /* The result string is converted.  */

#endif /* _LIBC || HAVE_ICONV */

  *lengthp = resultlen;
  return result;
}


/* Look up a plural variant.  */
static char *
internal_function
plural_lookup (domain, n, translation, translation_len)
     struct loaded_l10nfile *domain;
     unsigned long int n;
     const char *translation;
     size_t translation_len;
{
  struct loaded_domain *domaindata = (struct loaded_domain *) domain->data;
  unsigned long int index;
  const char *p;

  index = plural_eval (domaindata->plural, n);
  if (index >= domaindata->nplurals)
    /* This should never happen.  It means the plural expression and the
       given maximum value do not match.  */
    index = 0;

  /* Skip INDEX strings at TRANSLATION.  */
  p = translation;
  while (index-- > 0)
    {
#ifdef _LIBC
      p = __rawmemchr (p, '\0');
#else
      p = strchr (p, '\0');
#endif
      /* And skip over the NUL byte.  */
      p++;

      if (p >= translation + translation_len)
	/* This should never happen.  It means the plural expression
	   evaluated to a value larger than the number of variants
	   available for MSGID1.  */
	return (char *) translation;
    }
  return (char *) p;
}


/* Function to evaluate the plural expression and return an index value.  */
static unsigned long int
internal_function
plural_eval (pexp, n)
     struct expression *pexp;
     unsigned long int n;
{
  switch (pexp->nargs)
    {
    case 0:
      switch (pexp->operation)
	{
	case var:
	  return n;
	case num:
	  return pexp->val.num;
	default:
	  break;
	}
      /* NOTREACHED */
      break;
    case 1:
      {
	/* pexp->operation must be lnot.  */
	unsigned long int arg = plural_eval (pexp->val.args[0], n);
	return ! arg;
      }
    case 2:
      {
	unsigned long int leftarg = plural_eval (pexp->val.args[0], n);
	if (pexp->operation == lor)
	  return leftarg || plural_eval (pexp->val.args[1], n);
	else if (pexp->operation == land)
	  return leftarg && plural_eval (pexp->val.args[1], n);
	else
	  {
	    unsigned long int rightarg = plural_eval (pexp->val.args[1], n);

	    switch (pexp->operation)
	      {
	      case mult:
		return leftarg * rightarg;
	      case divide:
		return leftarg / rightarg;
	      case module:
		return leftarg % rightarg;
	      case plus:
		return leftarg + rightarg;
	      case minus:
		return leftarg - rightarg;
	      case less_than:
		return leftarg < rightarg;
	      case greater_than:
		return leftarg > rightarg;
	      case less_or_equal:
		return leftarg <= rightarg;
	      case greater_or_equal:
		return leftarg >= rightarg;
	      case equal:
		return leftarg == rightarg;
	      case not_equal:
		return leftarg != rightarg;
	      default:
		break;
	      }
	  }
	/* NOTREACHED */
	break;
      }
    case 3:
      {
	/* pexp->operation must be qmop.  */
	unsigned long int boolarg = plural_eval (pexp->val.args[0], n);
	return plural_eval (pexp->val.args[boolarg ? 1 : 2], n);
      }
    }
  /* NOTREACHED */
  return 0;
}


/* Return string representation of locale CATEGORY.  */
static const char *
internal_function
category_to_name (category)
     int category;
{
  const char *retval;

  switch (category)
  {
#ifdef LC_COLLATE
  case LC_COLLATE:
    retval = "LC_COLLATE";
    break;
#endif
#ifdef LC_CTYPE
  case LC_CTYPE:
    retval = "LC_CTYPE";
    break;
#endif
#ifdef LC_MONETARY
  case LC_MONETARY:
    retval = "LC_MONETARY";
    break;
#endif
#ifdef LC_NUMERIC
  case LC_NUMERIC:
    retval = "LC_NUMERIC";
    break;
#endif
#ifdef LC_TIME
  case LC_TIME:
    retval = "LC_TIME";
    break;
#endif
#ifdef LC_MESSAGES
  case LC_MESSAGES:
    retval = "LC_MESSAGES";
    break;
#endif
#ifdef LC_RESPONSE
  case LC_RESPONSE:
    retval = "LC_RESPONSE";
    break;
#endif
#ifdef LC_ALL
  case LC_ALL:
    /* This might not make sense but is perhaps better than any other
       value.  */
    retval = "LC_ALL";
    break;
#endif
  default:
    /* If you have a better idea for a default value let me know.  */
    retval = "LC_XXX";
  }

  return retval;
}

/* Guess value of current locale from value of the environment variables.  */
static const char *
internal_function
guess_category_value (category, categoryname)
     int category;
     const char *categoryname;
{
  const char *language;
  const char *retval;

  /* The highest priority value is the `LANGUAGE' environment
     variable.  But we don't use the value if the currently selected
     locale is the C locale.  This is a GNU extension.  */
  language = getenv ("LANGUAGE");
  if (language != NULL && language[0] == '\0')
    language = NULL;

  /* We have to proceed with the POSIX methods of looking to `LC_ALL',
     `LC_xxx', and `LANG'.  On some systems this can be done by the
     `setlocale' function itself.  */
#if defined _LIBC || (defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL)
  retval = setlocale (category, NULL);
#else
  /* Setting of LC_ALL overwrites all other.  */
  retval = getenv ("LC_ALL");
  if (retval == NULL || retval[0] == '\0')
    {
      /* Next comes the name of the desired category.  */
      retval = getenv (categoryname);
      if (retval == NULL || retval[0] == '\0')
	{
	  /* Last possibility is the LANG environment variable.  */
	  retval = getenv ("LANG");
	  if (retval == NULL || retval[0] == '\0')
	    /* We use C as the default domain.  POSIX says this is
	       implementation defined.  */
	    return "C";
	}
    }
#endif

  return language != NULL && strcmp (retval, "C") != 0 ? language : retval;
}

/* @@ begin of epilog @@ */

/* We don't want libintl.a to depend on any other library.  So we
   avoid the non-standard function stpcpy.  In GNU C Library this
   function is available, though.  Also allow the symbol HAVE_STPCPY
   to be defined.  */
#if !_LIBC && !HAVE_STPCPY
static char *
stpcpy (dest, src)
     char *dest;
     const char *src;
{
  while ((*dest++ = *src++) != '\0')
    /* Do nothing. */ ;
  return dest - 1;
}
#endif

#if !_LIBC && !HAVE_MEMPCPY
static void *
mempcpy (dest, src, n)
     void *dest;
     const void *src;
     size_t n;
{
  return (void *) ((char *) memcpy (dest, src, n) + n);
}
#endif


#ifdef _LIBC
/* If we want to free all resources we have to do some work at
   program's end.  */
static void __attribute__ ((unused))
free_mem (void)
{
  void *old;

  while (_nl_domain_bindings != NULL)
    {
      struct binding *oldp = _nl_domain_bindings;
      _nl_domain_bindings = _nl_domain_bindings->next;
      if (oldp->dirname != _nl_default_dirname)
	/* Yes, this is a pointer comparison.  */
	free (oldp->dirname);
      free (oldp->codeset);
      free (oldp);
    }

  if (_nl_current_default_domain != _nl_default_default_domain)
    /* Yes, again a pointer comparison.  */
    free ((char *) _nl_current_default_domain);

  /* Remove the search tree with the known translations.  */
  __tdestroy (root, free);
  root = NULL;

  while (transmem_list != NULL)
    {
      old = transmem_list;
      transmem_list = transmem_list->next;
      free (old);
    }
}

text_set_element (__libc_subfreeres, free_mem);
#endif