Back to index

glibc  2.9
Defines | Functions | Variables
loadlocale.c File Reference
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <not-cancel.h>
#include "localeinfo.h"
#include "categories.def"

Go to the source code of this file.

Defines

#define DEFINE_CATEGORY(category, category_name, items, a)   [category] = _NL_ITEM_INDEX (_NL_NUM_##category),
#define NO_PAREN(arg, rest...)   arg, ##rest
#define DEFINE_CATEGORY(category, category_name, items, a)   static const enum value_type _nl_value_type_##category[] = { NO_PAREN items };
#define DEFINE_ELEMENT(element, element_name, optstd, type, rest...)   [_NL_ITEM_INDEX (element)] = type,
#define DEFINE_CATEGORY(category, category_name, items, a)   [category] = _nl_value_type_##category,
#define CATTEST(cat)

Functions

struct locale_data
*internal_function 
_nl_intern_locale_data (int category, const void *data, size_t datasize)
void internal_function _nl_load_locale (struct loaded_l10nfile *file, int category)
void internal_function _nl_unload_locale (struct locale_data *locale)

Variables

static const size_t _nl_category_num_items []
static enum value_type *const _nl_value_types []

Define Documentation

#define CATTEST (   cat)
Value:
case LC_##cat:                                                       \
         assert (cnt < (sizeof (_nl_value_type_LC_##cat)                    \
                      / sizeof (_nl_value_type_LC_##cat[0])));       \
         break
#define DEFINE_CATEGORY (   category,
  category_name,
  items,
  a 
)    [category] = _NL_ITEM_INDEX (_NL_NUM_##category),

Definition at line 48 of file loadlocale.c.

#define DEFINE_CATEGORY (   category,
  category_name,
  items,
  a 
)    static const enum value_type _nl_value_type_##category[] = { NO_PAREN items };

Definition at line 48 of file loadlocale.c.

#define DEFINE_CATEGORY (   category,
  category_name,
  items,
  a 
)    [category] = _nl_value_type_##category,

Definition at line 48 of file loadlocale.c.

#define DEFINE_ELEMENT (   element,
  element_name,
  optstd,
  type,
  rest... 
)    [_NL_ITEM_INDEX (element)] = type,

Definition at line 50 of file loadlocale.c.

#define NO_PAREN (   arg,
  rest... 
)    arg, ##rest

Definition at line 46 of file loadlocale.c.


Function Documentation

struct locale_data* internal_function _nl_intern_locale_data ( int  category,
const void *  data,
size_t  datasize 
) [read]

Definition at line 66 of file loadlocale.c.

{
  const struct
    {
      unsigned int magic;
      unsigned int nstrings;
      unsigned int strindex[0];
    } *const filedata = data;
  struct locale_data *newdata;
  size_t cnt;

  if (__builtin_expect (datasize < sizeof *filedata, 0)
      || __builtin_expect (filedata->magic != LIMAGIC (category), 0))
    {
      /* Bad data file.  */
      __set_errno (EINVAL);
      return NULL;
    }

  if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category],
                     0)
      || (__builtin_expect (sizeof *filedata
                         + filedata->nstrings * sizeof (unsigned int)
                         >= datasize, 0)))
    {
      /* Insufficient data.  */
      __set_errno (EINVAL);
      return NULL;
    }

  newdata = malloc (sizeof *newdata
                  + filedata->nstrings * sizeof (union locale_data_value));
  if (newdata == NULL)
    return NULL;

  newdata->filedata = (void *) filedata;
  newdata->filesize = datasize;
  newdata->private.data = NULL;
  newdata->private.cleanup = NULL;
  newdata->usage_count = 0;
  newdata->use_translit = 0;
  newdata->nstrings = filedata->nstrings;
  for (cnt = 0; cnt < newdata->nstrings; ++cnt)
    {
      size_t idx = filedata->strindex[cnt];
      if (__builtin_expect (idx > (size_t) newdata->filesize, 0))
       {
       puntdata:
         free (newdata);
         __set_errno (EINVAL);
         return NULL;
       }

      /* Determine the type.  There is one special case: the LC_CTYPE
        category can have more elements than there are in the
        _nl_value_type_LC_XYZ array.  There are all pointers.  */
      switch (category)
       {
#define CATTEST(cat) \
       case LC_##cat:                                                       \
         assert (cnt < (sizeof (_nl_value_type_LC_##cat)                    \
                      / sizeof (_nl_value_type_LC_##cat[0])));       \
         break
         CATTEST (NUMERIC);
         CATTEST (TIME);
         CATTEST (COLLATE);
         CATTEST (MONETARY);
         CATTEST (MESSAGES);
         CATTEST (PAPER);
         CATTEST (NAME);
         CATTEST (ADDRESS);
         CATTEST (TELEPHONE);
         CATTEST (MEASUREMENT);
         CATTEST (IDENTIFICATION);
       default:
         assert (category == LC_CTYPE);
         break;
       }

      if ((category == LC_CTYPE
          && cnt >= (sizeof (_nl_value_type_LC_CTYPE)
                    / sizeof (_nl_value_type_LC_CTYPE[0])))
         || __builtin_expect (_nl_value_types[category][cnt] != word, 1))
       newdata->values[cnt].string = newdata->filedata + idx;
      else
       {
         if (idx % __alignof__ (u_int32_t) != 0)
           goto puntdata;
         newdata->values[cnt].word =
           *((const u_int32_t *) (newdata->filedata + idx));
       }
    }

  return newdata;
}

Here is the caller graph for this function:

void internal_function _nl_load_locale ( struct loaded_l10nfile file,
int  category 
)

Definition at line 164 of file loadlocale.c.

{
  int fd;
  void *filedata;
  struct stat64 st;
  struct locale_data *newdata;
  int save_err;
  int alloc = ld_mapped;

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

  fd = open_not_cancel_2 (file->filename, O_RDONLY);
  if (__builtin_expect (fd, 0) < 0)
    /* Cannot open the file.  */
    return;

  if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
    {
    puntfd:
      close_not_cancel_no_status (fd);
      return;
    }
  if (__builtin_expect (S_ISDIR (st.st_mode), 0))
    {
      /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
           instead.  */
      char *newp;
      size_t filenamelen;

      close_not_cancel_no_status (fd);

      filenamelen = strlen (file->filename);
      newp = (char *) alloca (filenamelen
                           + 5 + _nl_category_name_sizes[category] + 1);
      __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen),
                         "/SYS_", 5),
               _nl_category_names.str + _nl_category_name_idxs[category],
               _nl_category_name_sizes[category] + 1);

      fd = open_not_cancel_2 (newp, O_RDONLY);
      if (__builtin_expect (fd, 0) < 0)
       return;

      if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
       goto puntfd;
    }

  /* Map in the file's data.  */
  save_err = errno;
#ifdef _POSIX_MAPPED_FILES
# ifndef MAP_COPY
  /* Linux seems to lack read-only copy-on-write.  */
#  define MAP_COPY MAP_PRIVATE
# endif
# ifndef MAP_FILE
  /* Some systems do not have this flag; it is superfluous.  */
#  define MAP_FILE 0
# endif
  filedata = __mmap ((caddr_t) 0, st.st_size,
                   PROT_READ, MAP_FILE|MAP_COPY, fd, 0);
  if (__builtin_expect (filedata == MAP_FAILED, 0))
    {
      if (__builtin_expect (errno, ENOSYS) == ENOSYS)
       {
#endif /* _POSIX_MAPPED_FILES */
         /* No mmap; allocate a buffer and read from the file.  */
         alloc = ld_malloced;
         filedata = malloc (st.st_size);
         if (filedata != NULL)
           {
             off_t to_read = st.st_size;
             ssize_t nread;
             char *p = (char *) filedata;
             while (to_read > 0)
              {
                nread = read_not_cancel (fd, p, to_read);
                if (__builtin_expect (nread, 1) <= 0)
                  {
                    free (filedata);
                    if (nread == 0)
                     __set_errno (EINVAL); /* Bizarreness going on.  */
                    goto puntfd;
                  }
                p += nread;
                to_read -= nread;
              }
             __set_errno (save_err);
           }
#ifdef _POSIX_MAPPED_FILES
       }
    }
#endif /* _POSIX_MAPPED_FILES */

  /* We have mapped the data, so we no longer need the descriptor.  */
  close_not_cancel_no_status (fd);

  if (__builtin_expect (filedata == NULL, 0))
    /* We failed to map or read the data.  */
    return;

  newdata = _nl_intern_locale_data (category, filedata, st.st_size);
  if (__builtin_expect (newdata == NULL, 0))
    /* Bad data.  */
    {
#ifdef _POSIX_MAPPED_FILES
      if (alloc == ld_mapped)
       __munmap ((caddr_t) filedata, st.st_size);
#endif
      return;
    }

  /* _nl_intern_locale_data leaves us these fields to initialize.  */
  newdata->name = NULL;     /* This will be filled if necessary in findlocale.c. */
  newdata->alloc = alloc;

  file->data = newdata;
}

Here is the call graph for this function:

Here is the caller graph for this function:

void internal_function _nl_unload_locale ( struct locale_data locale)

Definition at line 285 of file loadlocale.c.

{
  if (locale->private.cleanup)
    (*locale->private.cleanup) (locale);

  switch (__builtin_expect (locale->alloc, ld_mapped))
    {
    case ld_malloced:
      free ((void *) locale->filedata);
      break;
    case ld_mapped:
#ifdef _POSIX_MAPPED_FILES
      __munmap ((caddr_t) locale->filedata, locale->filesize);
      break;
#endif
    case ld_archive:        /* Nothing to do.  */
      break;
    }

  if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive)
    free ((char *) locale->name);

  free (locale);
}

Here is the call graph for this function:

Here is the caller graph for this function:


Variable Documentation

Definition at line 37 of file loadlocale.c.

enum value_type* const _nl_value_types[] [static]

Definition at line 55 of file loadlocale.c.