Back to index

plt-scheme  4.2.1
Functions | Variables
loadmsgcat.c File Reference
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "gettext.h"
#include "gettextP.h"

Go to the source code of this file.

Functions

void _nl_load_domain (struct loaded_l10nfile *domain_file)

Variables

int _nl_msg_cat_cntr

Function Documentation

Definition at line 64 of file loadmsgcat.c.

{
  int fd;
  struct stat st;
  struct mo_file_header *data = (struct mo_file_header *) -1;
#if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \
    || defined _LIBC
  int use_mmap = 0;
#endif
  struct loaded_domain *domain;

  domain_file->decided = 1;
  domain_file->data = NULL;

  /* If the record does not represent a valid locale the FILENAME
     might be NULL.  This can happen when according to the given
     specification the locale file name is different for XPG and CEN
     syntax.  */
  if (domain_file->filename == NULL)
    return;

  /* Try to open the addressed file.  */
  fd = open (domain_file->filename, O_RDONLY);
  if (fd == -1)
    return;

  /* We must know about the size of the file.  */
  if (fstat (fd, &st) != 0
      && st.st_size < (off_t) sizeof (struct mo_file_header))
    {
      /* Something went wrong.  */
      close (fd);
      return;
    }

#if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \
    || defined _LIBC
  /* Now we are ready to load the file.  If mmap() is available we try
     this first.  If not available or it failed we try to load it.  */
  data = (struct mo_file_header *) mmap (NULL, st.st_size, PROT_READ,
                                    MAP_PRIVATE, fd, 0);

  if (data != (struct mo_file_header *) -1)
    {
      /* mmap() call was successful.  */
      close (fd);
      use_mmap = 1;
    }
#endif

  /* If the data is not yet available (i.e. mmap'ed) we try to load
     it manually.  */
  if (data == (struct mo_file_header *) -1)
    {
      off_t to_read;
      char *read_ptr;

      data = (struct mo_file_header *) malloc (st.st_size);
      if (data == NULL)
       return;

      to_read = st.st_size;
      read_ptr = (char *) data;
      do
       {
         long int nb = (long int) read (fd, read_ptr, to_read);
         if (nb == -1)
           {
             close (fd);
             return;
           }

         read_ptr += nb;
         to_read -= nb;
       }
      while (to_read > 0);

      close (fd);
    }

  /* Using the magic number we can test whether it really is a message
     catalog file.  */
  if (data->magic != _MAGIC && data->magic != _MAGIC_SWAPPED)
    {
      /* The magic number is wrong: not a message catalog file.  */
#if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \
    || defined _LIBC
      if (use_mmap)
       munmap ((caddr_t) data, st.st_size);
      else
#endif
       free (data);
      return;
    }

  domain_file->data
    = (struct loaded_domain *) malloc (sizeof (struct loaded_domain));
  if (domain_file->data == NULL)
    return;

  domain = (struct loaded_domain *) domain_file->data;
  domain->data = (char *) data;
  domain->must_swap = data->magic != _MAGIC;

  /* Fill in the information about the available tables.  */
  switch (W (domain->must_swap, data->revision))
    {
    case 0:
      domain->nstrings = W (domain->must_swap, data->nstrings);
      domain->orig_tab = (struct string_desc *)
       ((char *) data + W (domain->must_swap, data->orig_tab_offset));
      domain->trans_tab = (struct string_desc *)
       ((char *) data + W (domain->must_swap, data->trans_tab_offset));
      domain->hash_size = W (domain->must_swap, data->hash_tab_size);
      domain->hash_tab = (nls_uint32 *)
       ((char *) data + W (domain->must_swap, data->hash_tab_offset));
      break;
    default:
      /* This is an illegal revision.  */
#if (defined HAVE_MMAP && defined HAVE_MUNMAP && !defined DISALLOW_MMAP) \
    || defined _LIBC
      if (use_mmap)
       munmap ((caddr_t) data, st.st_size);
      else
#endif
       free (data);
      free (domain);
      domain_file->data = NULL;
      return;
    }

  /* Show that one domain is changed.  This might make some cached
     translations invalid.  */
  ++_nl_msg_cat_cntr;
}

Here is the caller graph for this function:


Variable Documentation

Definition at line 58 of file loadmsgcat.c.