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glibc/locale/locfile-parse.c

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/* Copyright (C) 1995 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <errno.h>
#include <assert.h>
#include <dirent.h>
#include <fcntl.h>
#include <langinfo.h>
#include <libintl.h>
#include <limits.h>
#include <obstack.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include "localedef.h"
#include "localeinfo.h"
#include "token.h"
/* We don't have these constants defined because we don't use them. Give
default values. */
#define CTYPE_MB_CUR_MIN 0
#define CTYPE_MB_CUR_MAX 0
#define CTYPE_HASH_SIZE 0
#define CTYPE_HASH_LAYERS 0
#define CTYPE_CLASS 0
#define CTYPE_TOUPPER_EB 0
#define CTYPE_TOLOWER_EB 0
#define CTYPE_TOUPPER_EL 0
#define CTYPE_TOLOWER_EL 0
/* We have all categories defined in `categories.def'. Now construct
the description and data structure used for all categories. */
#define DEFINE_CATEGORY(category, name, items, postload, in, check, out) \
struct cat_item category##_desc[] = \
{ \
NO_PAREN items \
}; \
\
char *category##_values[NELEMS (category##_desc) - 1] = { NULL, };
#include "categories.def"
#undef DEFINE_CATEGORY
struct category category[] =
{
#define DEFINE_CATEGORY(category, name, items, postload, in, check, out) \
[category] = { _NL_NUM_##category, name, NELEMS (category##_desc) - 1, \
category##_desc, category##_values, in, check, out },
#include "categories.def"
#undef DEFINE_CATEGORY
};
#define NCATEGORIES NELEMS (category)
#define SYNTAX_ERROR \
error (0, 0, gettext ("%s:%Zd: syntax error in locale definition file"), \
locfile_data.filename, locfile_data.line_no)
/* Prototypes for local functions. */
static int get_byte (char *byte_ptr);
static char *is_locale_name (int cat_no, const char *str, int len);
/* Read a locale definition file FILE. The format is defined in
POSIX.2 2.5.3. */
void
locfile_read (const char *fname)
{
/* Pointer to text of last token. */
char *ptr;
/* Length of last token (or if NUMBER the value itself). */
int len;
/* The last returned token. */
int token;
/* For error correction we remember whether the last token was correct. */
int correct_token = 1;
/* Open the desired input file on stdin. */
locfile_open (fname);
while ((token = locfile_lex (&ptr, &len)) != 0)
{
int cat_no;
for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
if (token == category[cat_no].cat_id)
break;
if (cat_no >= NCATEGORIES)
/* A syntax error occured. No valid category defintion starts. */
{
if (correct_token != 0)
error (0, 0, gettext ("%s:%Zd: locale category start expected"),
locfile_data.filename, locfile_data.line_no);
/* To prevent following errors mark as error case. */
correct_token = 0;
/* Synchronization point is the beginning of a new category.
Overread all line upto this silently. */
ignore_to_eol (0, 0);
continue;
}
/* Rest of the line should be empty. */
ignore_to_eol (0, 1);
/* Perhaps these category is already specified. We simply give a
warning and overwrite the values. */
if (category[cat_no].filled != 0)
error (0, 0, gettext ("%s:%Zd: multiple definition of locale "
"category %s"), locfile_data.filename,
locfile_data.line_no, category[cat_no].name);
/* We read the first token because this could be the copy statement. */
token = xlocfile_lex (&ptr, &len);
if (token == TOK_COPY)
/* Copying the definitions from an existing locale is requested. */
{
char *str;
/* Get the name of the locale to copy from. */
token = xlocfile_lex (&ptr, &len);
if (token != TOK_IDENT && token != TOK_STRING)
/* No name, then mark error and ignore everything upto next
start of an category section. */
{
/* To prevent following errors mark as error case. */
correct_token = 0;
/* Synchronization point is the beginning of a new category.
Overread all line upto this silently. */
ignore_to_eol (0, 0);
}
else if ((str = is_locale_name (cat_no, ptr, len)) != NULL)
/* Yes the name really names an existing locale file. We are
returned the complete file name. Store it so that we can
copy it in the output phase. */
{
category[cat_no].copy_locale = str;
category[cat_no].filled = 1;
ignore_to_eol (0, 1);
}
else
/* No, the name does not address a valid locale file. Mark
error case and ignore rest of category. */
{
char tmp[len + 1];
memcpy (tmp, ptr, len);
tmp[len] = '\0';
error (0, 0, gettext ("%s:%Zd: invalid locale `%s' in copy "
"statement"), locfile_data.filename,
locfile_data.line_no, tmp);
correct_token = 0;
ignore_to_eol (0, 0);
}
/* This should END as the next token. */
token = xlocfile_lex (&ptr, &len);
if (token == TOK_END)
/* This is the end of the category. */
{
token = xlocfile_lex (&ptr, &len);
if (token != category[cat_no].cat_id)
/* Wrong category name after END. */
{
error (0, 0, gettext ("%s:%Zd: category `%s' does not "
"end with `END %s'"),
locfile_data.filename, locfile_data.line_no,
category[cat_no].name, category[cat_no].name);
ignore_to_eol (0, 0);
}
else
ignore_to_eol (0, 1);
correct_token = 1;
}
else
/* No END following copy. Give error while not in error case. */
{
if (correct_token != 0)
error (0, 0, gettext ("%s:%Zd: `copy' must be sole rule"),
locfile_data.filename, locfile_data.line_no);
correct_token = 0;
ignore_to_eol (0, 0);
}
continue;
}
/* Now it's time to mark as mentioned in the locale file. */
category[cat_no].filled = 1;
if (category[cat_no].infct != NULL)
/* The category needs a special input handling. */
{
category[cat_no].infct(token);
continue;
}
/* Now process the given items. */
while (1)
{
int item_no;
if (token == TOK_END)
/* This is the end of the category. */
{
token = xlocfile_lex (&ptr, &len);
if (token != category[cat_no].cat_id)
{
error (0, 0, gettext ("%s:%Zd: category `%s' does not end "
"with `END %s'"),
locfile_data.filename, locfile_data.line_no,
category[cat_no].name, category[cat_no].name);
ignore_to_eol (0, 0);
}
else
ignore_to_eol (0, 1);
/* Start next category. */
break;
}
/* All other lines should describe valid items of the category. */
for (item_no = 0; item_no < category[cat_no].number; ++item_no)
if (category[cat_no].item_desc[item_no].item_id == token)
break;
if (item_no >= category[cat_no].number)
/* This is not a valid item of the category. */
{
SYNTAX_ERROR;
ignore_to_eol (0, 0);
token = xlocfile_lex (&ptr, &len);
/* And process next item. */
continue;
}
/* Test whether already a value is defined. */
if (category[cat_no].item_value[item_no] != NULL)
error (0, 0, gettext ("%s:%Zd: category item `%s' already "
"defined"),
locfile_data.filename, locfile_data.line_no,
category[cat_no].item_desc[item_no].name);
switch (category[cat_no].item_desc[item_no].value_type)
{
case string:
/* Get next token. This is the argument to the item. */
token = xlocfile_lex (&ptr, &len);
if (token != TOK_STRING)
SYNTAX_ERROR;
else
category[cat_no].item_value[item_no] = strdup (ptr);
ignore_to_eol (0, ptr != NULL);
break;
case stringarray:
/* This is a difficult case. The number of strings in
the array may vary. But for now its only necessary
with ALT_DIGITS from LC_TIME. This item is the last
so be can solve it by storing the number of string in
the first place and the string indeces following
that. */
{
int cnt;
char **buffer;
if (category[cat_no].item_value[item_no] != NULL)
buffer = (char **) category[cat_no].item_value[item_no];
else
buffer = (char **) xmalloc (
sizeof (char *) * category[cat_no].item_desc[item_no].max);
category[cat_no].item_value[item_no] = (char *) buffer;
/* As explained we may need a place to store the real number
of strings. */
if (category[cat_no].item_desc[item_no].min
!= category[cat_no].item_desc[item_no].max)
++buffer;
cnt = 0;
do
{
token = xlocfile_lex (&ptr, &len);
if (token != TOK_STRING)
{
SYNTAX_ERROR;
break;
}
if (cnt >= category[cat_no].item_desc[item_no].max)
{
error (0, 0, gettext ("%s:%Zd: too many elements "
"for item `%s`"),
locfile_data.filename, locfile_data.line_no,
category[cat_no].item_desc[item_no].name);
break;
}
buffer[cnt++] = strdup (ptr);
token = locfile_lex (&ptr, &len);
}
while (token == TOK_CHAR && len == ';');
ignore_to_eol (token, ptr != NULL);
if (cnt < category[cat_no].item_desc[item_no].min)
error (0, 0, gettext ("%s:%Zd: too few elements for item "
"`%s'"),
locfile_data.filename, locfile_data.line_no,
category[cat_no].item_desc[item_no].name);
if (category[cat_no].item_desc[item_no].min
!= category[cat_no].item_desc[item_no].max)
*(int *) category[cat_no].item_value[item_no] = cnt;
}
break;
case byte:
{
int ok;
category[cat_no].item_value[item_no] = (char *) xmalloc (
__alignof__ (char));
ok = get_byte (category[cat_no].item_value[item_no]);
ignore_to_eol (0, ok);
}
break;
case bytearray:
{
char *buffer;
int maxsize;
int cnt;
char byte;
int ok;
buffer = (char *) xmalloc ((maxsize = 30));
cnt = 0;
while ((ok = get_byte (&byte)))
{
if (cnt >= maxsize)
buffer = (char *) xmalloc ((maxsize *= 2));
buffer[cnt++] = byte;
token = locfile_lex (&ptr, &len);
if (token != TOK_CHAR || len != ';')
break;
}
buffer[cnt] = '\0';
category[cat_no].item_value[item_no] = buffer;
ignore_to_eol (token, ok);
}
break;
default:
error (5, 0, gettext ("internal error in %s, line %u"),
__FUNCTION__, __LINE__);
/* NOTREACHED */
}
/* Get next token. */
token = xlocfile_lex (&ptr, &len);
} /* while (1) */
}
}
/* Check given values for categories for consistency. */
void
categories_check (void)
{
int cat_no;
for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
if (category[cat_no].copy_locale == NULL)
if (category[cat_no].filled != 0)
if (category[cat_no].checkfct)
category[cat_no].checkfct();
else
{
int item_no;
for (item_no = 0; item_no < category[cat_no].number; ++item_no)
if (category[cat_no].item_value[item_no] == NULL)
{
int errcode;
/* If the item is defined in the standard is it an error to
have it not defined. */
errcode = category[cat_no].item_desc[item_no].status == std
? 5 : 0;
error (errcode, 0, gettext ("item `%s' of category `%s' "
"undefined"),
category[cat_no].item_desc[item_no].name,
category[cat_no].name);
}
}
else
error (0, 0, gettext ("category `%s' not defined"),
category[cat_no].name);
}
/* Write out the binary representation of the category data which can be
loaded by setlocale(1). */
void
categories_write (void)
{
struct locale_file
{
int magic;
int n;
int idx[0];
} *data;
struct obstack obstk;
int cat_no;
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
obstack_init (&obstk);
for (cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
{
int result = 0;
if (category[cat_no].copy_locale != NULL)
/* Simply copy the addressed locale file of the specified
category. Please note that this is tried before the distinction
between categories which need special handling is made. */
{
int source;
/* Open source file. */
source = open (category[cat_no].copy_locale, O_RDONLY);
if (source < 0)
error (0, 0, gettext ("cannot copy locale definition file `%s'"),
category[cat_no].copy_locale);
else
{
/* Construct file name of output file and open for writing. */
char path[strlen (output_path)
+ strlen(category[cat_no].name) + 1];
int dest;
char *t;
t = stpcpy (path, output_path);
strcpy (t, category[cat_no].name);
dest = creat (path, 0666);
if (dest == -1)
error (0, 0, gettext ("cannot open output file `%s': %m"),
path);
else
{
char buffer[BUFSIZ];
int size;
/* Copy the files. */
do
{
size = read (source, buffer, BUFSIZ);
write (dest, buffer, size);
}
while (size > 0);
close (dest);
/* Show success. */
puts (category[cat_no].name);
}
close (source);
}
/* Next category. */
continue;
}
if (category[cat_no].outfct)
result = category[cat_no].outfct();
else
{
char *path, *t;
int fd;
struct iovec *iov;
int item_no, len, slen, cnt;
int elems = 0;
/* Count number of elements. */
for (item_no = 0; item_no < category[cat_no].number; ++item_no)
{
switch (category[cat_no].item_desc[item_no].value_type)
{
case string:
case byte:
case bytearray:
++elems;
break;
case stringarray:
elems += category[cat_no].item_desc[item_no].max;
break;
default:
error (5, 0, gettext ("internal error in %s, line %u"),
__FUNCTION__, __LINE__);
/* NOTREACHED */
}
}
/* We now have the number of elements. We build the structure
and a helper structure for writing all out. */
len = sizeof (struct locale_file) + elems * sizeof (int);
data = obstack_alloc (&obstk, len);
iov = obstack_alloc (&obstk, (elems + 1) * sizeof (struct iovec));
data->magic = LIMAGIC (cat_no);
data->n = elems;
iov[0].iov_base = data;
iov[0].iov_len = len;
cnt = 0;
for (item_no = 0; item_no < category[cat_no].number; ++item_no)
if (category[cat_no].item_value[item_no] == NULL)
{
switch (category[cat_no].item_desc[item_no].value_type)
{
case string:
case byte:
case bytearray:
data->idx[cnt] = len;
++len; /* We reserve one single byte for this entry. */
iov[1 + cnt].iov_base = (char *) "";
iov[1 + cnt].iov_len = 1;
++cnt;
break;
case stringarray:
{
int max;
int nstr;
max = category[cat_no].item_desc[item_no].max;
for (nstr = 0; nstr < max; ++nstr)
{
data->idx[cnt] = len;
++len;
iov[1 + cnt].iov_base = (char *) "";
iov[1 + cnt].iov_len = 1;
++cnt;
}
}
}
}
else
switch (category[cat_no].item_desc[item_no].value_type)
{
case string:
case bytearray:
data->idx[cnt] = len;
slen = strlen (category[cat_no].item_value[item_no]) + 1;
len += slen;
iov[1 + cnt].iov_base = category[cat_no].item_value[item_no];
iov[1 + cnt].iov_len = slen;
++cnt;
break;
case byte:
data->idx[cnt] = len;
slen = 1;
len += slen;
iov[1 + cnt].iov_base = category[cat_no].item_value[item_no];
iov[1 + cnt].iov_len = slen;
++cnt;
break;
case stringarray:
{
int nstr, nact;
char **first;
if (category[cat_no].item_desc[item_no].min
== category[cat_no].item_desc[item_no].max)
{
nstr = category[cat_no].item_desc[item_no].min;
first = (char **) category[cat_no].item_value[item_no];
}
else
{
nstr = *(int *) category[cat_no].item_value[item_no];
first =
((char **) category[cat_no].item_value[item_no]) + 1;
}
nact = nstr;
while (nstr > 0)
{
data->idx[cnt] = len;
if (*first != NULL)
{
slen = strlen (*first) + 1;
iov[1 + cnt].iov_base = *first;
}
else
{
slen = 1;
iov[1 + cnt].iov_base = (char *) "";
}
len += slen;
iov[1 + cnt].iov_len = slen;
++cnt;
++first;
--nstr;
}
while (nact < category[cat_no].item_desc[item_no].max)
{
data->idx[cnt] = len;
len += 1;
iov[1 + cnt].iov_base = (char *) "";
iov[1 + cnt].iov_len = 1;
++cnt;
++nact;
}
}
break;
default:
/* Cannot happen. */
break;
}
assert (cnt <= elems);
/* Construct the output filename from the argument given to
localedef on the command line. */
path = (char *) obstack_alloc (&obstk, strlen (output_path) +
2 * strlen (category[cat_no].name) + 5);
t = stpcpy (path, output_path);
strcpy (t, category[cat_no].name);
fd = creat (path, 0666);
if (fd == -1)
{
/* Check whether it failed because the named file is a directory.
In that case we use the file .../LC_xxx/SYS_LC_xxx, as the
loading functions of the C Library do. */
struct stat st;
if (stat (path, &st) == 0 && S_ISDIR (st.st_mode))
{
stpcpy (stpcpy (strchr (path, '\0'), "/SYS_"),
category[cat_no].name);
fd = creat (path, 0666);
}
}
if (fd == -1)
{
error (0, 0, gettext ("cannot open output file `%s': %m"),
path);
result = 1;
}
else
{
if (writev (fd, iov, cnt + 1) == -1)
{
error (0, 0, gettext ("cannot write output file `%s': %m"),
path);
result = 1;
}
if (elems==0) write(fd, &elems, 10);
close (fd);
}
/* The old data is not needed anymore, but keep the obstack
intact. */
obstack_free (&obstk, data);
}
if (result == 0)
puts (category[cat_no].name);
}
/* Now the whole obstack can be removed. */
obstack_free (&obstk, NULL);
}
/* Get the representation of a number. This is a positive integer or
the number -1 which is handled as a special symbol by the scanner. */
static int
get_byte (char *byte_ptr)
{
int token;
char *ptr;
int len;
token = locfile_lex (&ptr, &len);
if (token != TOK_NUMBER && token != TOK_MINUS1)
/* None of the valid number format. */
{
error (0, 0, gettext ("%s:%Zd: number expected"),
locfile_data.filename, locfile_data.line_no);
*byte_ptr = 0;
return 0;
}
if (token == TOK_MINUS1)
{
*byte_ptr = CHAR_MAX;
return 1;
}
if (len > CHAR_MAX)
/* The value of the numbers has to be less than CHAR_MAX. This is
ok for the information they have to express. */
{
error (0, 0, gettext ("%s:%Zd: invalid number"),
locfile_data.filename, locfile_data.line_no);
*byte_ptr = 0;
return 0;
}
*byte_ptr = len;
return 1;
}
/* Test whether the string STR with length LEN is the name of an existing
locale and whether a file for category CAT_NO is found in this directory.
This categories are looked for in the system locale definition file
directory.
Return the complete file name for the category file. */
static char *
is_locale_name (int cat_no, const char *str, int len)
{
static char **locale_names = NULL;
static int max_count = 0;
static int locale_count = 0;
int cnt, exist, fd;
char *fname;
struct stat st;
if (locale_names == NULL)
/* Read in the list of all available locales. */
{
DIR *dir;
struct dirent *dirent;
/* LOCALE_NAMES is not NULL anymore, but LOCALE_COUNT == 0. */
++locale_names;
dir = opendir (LOCALE_PATH);
if (dir == NULL)
{
error (1, errno, gettext ("cannot read locale directory `%s'"),
LOCALE_PATH);
return NULL;
}
/* Now we can look for all files in the directory. */
while ((dirent = readdir (dir)) != NULL)
if (strcmp (dirent->d_name, ".") != 0
&& strcmp (dirent->d_name, "..") != 0)
{
if (max_count == 0)
locale_names = (char **) xmalloc ((max_count = 10)
* sizeof (char *));
else if (locale_count >= max_count)
locale_names = (char **) xrealloc (locale_names,
(max_count *= 2)
* sizeof (char *));
locale_names[locale_count++] = strdup (dirent->d_name);
}
closedir (dir);
}
for (cnt = 0; cnt < locale_count; ++cnt)
if (strncmp (str, locale_names[cnt], len) == 0
&& locale_names[cnt][len] == '\0')
break;
if (cnt >= locale_count)
return NULL;
/* Now search for this specific locale file. */
asprintf (&fname, "%s/%s/%s", LOCALE_PATH, locale_names[cnt],
category[cat_no].name);
fd = open (fname, O_RDONLY);
if (fd < 0)
{
free (fname);
return NULL;
}
exist = fstat (fd, &st);
close (fd);
if (exist < 0)
{
free (fname);
return NULL;
}
return fname;
}
/*
* Local Variables:
* mode:c
* c-basic-offset:2
* End:
*/
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