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/* simple-gettext.c - a simplified version of gettext.
* Copyright (C) 1995, 1996, 1997, 1999,
* 2005 Free Software Foundation, Inc.
*
* This file is part of XTrackCAD.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* This is a simplified version of gettext written by Ulrich Drepper.
* It is used for the Win32 version of GnuPG beucase all the overhead
* of gettext is not needed and we have to do some special Win32 stuff.
* I decided that this is far easier than to tweak gettext for the special
* cases (I tried it but it is a lot of code). wk 15.09.99
*/
/*
* Based on the simple-gettext from GnuPG a version appropriate for the
* needs of XTrackCAD was derived. This is a workaround for any compiler
* specifics or runtime library dependencies. mf 26.07.09
*/
#ifdef USE_SIMPLE_GETTEXT
#if !defined (_WIN32) && !defined (__CYGWIN32__)
#error This file can only be used under Windows or Cygwin32
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <windows.h>
#include "mswint.h"
#if _MSC_VER > 1300
#define stricmp _stricmp
#define strnicmp _strnicmp
#define strdup _strdup
#define fileno _fileno
#endif
typedef unsigned long u32;
/* The magic number of the GNU message catalog format. */
#define MAGIC 0x950412de
#define MAGIC_SWAPPED 0xde120495
/* Revision number of the currently used .mo (binary) file format. */
#define MO_REVISION_NUMBER 0
/* Header for binary .mo file format. */
struct mo_file_header
{
/* The magic number. */
u32 magic;
/* The revision number of the file format. */
u32 revision;
/* The number of strings pairs. */
u32 nstrings;
/* Offset of table with start offsets of original strings. */
u32 orig_tab_offset;
/* Offset of table with start offsets of translation strings. */
u32 trans_tab_offset;
/* Size of hashing table. */
u32 hash_tab_size;
/* Offset of first hashing entry. */
u32 hash_tab_offset;
};
struct string_desc
{
/* Length of addressed string. */
u32 length;
/* Offset of string in file. */
u32 offset;
};
struct overflow_space_s
{
struct overflow_space_s *next;
u32 idx;
char d[1];
};
struct loaded_domain
{
char *data;
int must_swap;
u32 nstrings;
char *mapped; /* 0 = not yet mapped, 1 = mapped,
2 = mapped to
overflow space */
struct overflow_space_s *overflow_space;
struct string_desc *orig_tab;
struct string_desc *trans_tab;
u32 hash_size;
u32 *hash_tab;
};
static struct loaded_domain *the_domain;
/**
* Translate the input string from UTF8 to Windows codepage.
*
* \param str IN string in UTF-8 format to translate.
* \param len IN number of chars to translate
* \param dummy IN ?
* \return pointer to translated string. Free after usage
*/
char *
utf8_to_native( char *str, unsigned int len, int dummy )
{
/* maximum output length is size of string * 2 */
int buflen = (len + 1) * 2;
char *buf = malloc( buflen );
int wcharLen;
/* maximum result size is size of UTF-8 string */
char *resBuffer = malloc( len + 1 );
if( !resBuffer ) {
resBuffer = "ERROR in UTF-8 MALLOC";
} else {
/* as Windows has no way fo a direct translation fom UTF-8 to */
/* the system codepage, we need to take two steps */
/* 1. convert from UTF-8 to UTF-16 */
wcharLen = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)str, -1, (LPWSTR)buf, buflen / 2 );
/* 2. convert from UTF-8 to system codepage */
WideCharToMultiByte(CP_ACP, 0, (LPWSTR)buf, wcharLen, resBuffer, len + 1, NULL, NULL );
free( buf );
}
return( resBuffer );
}
static u32
do_swap_u32( u32 i )
{
return (i << 24) | ((i & 0xff00) << 8) | ((i >> 8) & 0xff00) | (i >> 24);
}
#define SWAPIT(flag, data) ((flag) ? do_swap_u32(data) : (data) )
/* We assume to have `unsigned long int' value with at least 32 bits. */
#define HASHWORDBITS 32
/* The so called `hashpjw' function by P.J. Weinberger
[see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
1986, 1987 Bell Telephone Laboratories, Inc.] */
static unsigned long
hash_string( const char *str_param )
{
unsigned long int hval, g;
const char *str = str_param;
hval = 0;
while (*str != '\0')
{
hval <<= 4;
hval += (unsigned long int) *str++;
g = hval & ((unsigned long int) 0xf << (HASHWORDBITS - 4));
if (g != 0)
{
hval ^= g >> (HASHWORDBITS - 8);
hval ^= g;
}
}
return hval;
}
static struct loaded_domain *
load_domain( const char *filename )
{
FILE *fp;
size_t size;
struct stat st;
struct mo_file_header *data = NULL;
struct loaded_domain *domain = NULL;
size_t to_read;
char *read_ptr;
fp = fopen( filename, "rb" );
if( !fp )
return NULL; /* can't open the file */
/* we must know about the size of the file */
if( fstat( fileno(fp ), &st )
|| (size = (size_t)st.st_size) != st.st_size
|| size < sizeof (struct mo_file_header) ) {
fclose( fp );
return NULL;
}
data = malloc( size );
if( !data ) {
fclose( fp );
return NULL; /* out of memory */
}
to_read = size;
read_ptr = (char *) data;
do {
unsigned long int nb = fread( read_ptr, 1, to_read, fp );
if( nb < to_read ) {
fclose (fp);
free(data);
return NULL; /* read error */
}
read_ptr += nb;
to_read -= nb;
} while( to_read > 0 );
fclose (fp);
/* 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. */
free( data );
return NULL;
}
domain = calloc( 1, sizeof *domain );
if( !domain ) {
free( data );
return NULL;
}
domain->data = (char *) data;
domain->must_swap = data->magic != MAGIC;
/* Fill in the information about the available tables. */
switch( SWAPIT(domain->must_swap, data->revision) ) {
case 0:
domain->nstrings = SWAPIT(domain->must_swap, data->nstrings);
domain->orig_tab = (struct string_desc *)
((char *) data + SWAPIT(domain->must_swap, data->orig_tab_offset));
domain->trans_tab = (struct string_desc *)
((char *) data + SWAPIT(domain->must_swap, data->trans_tab_offset));
domain->hash_size = SWAPIT(domain->must_swap, data->hash_tab_size);
domain->hash_tab = (u32 *)
((char *) data + SWAPIT(domain->must_swap, data->hash_tab_offset));
break;
default: /* This is an invalid revision. */
free( data );
free( domain );
return NULL;
}
/* Allocate an array to keep track of code page mappings. */
domain->mapped = calloc( 1, domain->nstrings );
if( !domain->mapped ) {
free( data );
free( domain );
return NULL;
}
return domain;
}
/**
* Set the file used for translations. Pass a NULL to disable
* translation. A new filename may be set at anytime. WARNING:
* After changing the filename you should not access any data
* retrieved by gettext().
*/
int
set_gettext_file ( const char *filename, const char *regkey )
{
struct loaded_domain *domain = NULL;
if( filename && *filename ) {
if( filename[0] == '/'
|| ( isalpha(filename[0])
&& filename[1] == ':'
&& (filename[2] == '/' || filename[2] == '\\') )
) {
/* absolute path - use it as is */
domain = load_domain( filename );
}
if (!domain)
return -1;
}
if( the_domain ) {
struct overflow_space_s *os, *os2;
free( the_domain->data );
free( the_domain->mapped );
for (os=the_domain->overflow_space; os; os = os2) {
os2 = os->next;
free (os);
}
free( the_domain );
the_domain = NULL;
}
the_domain = domain;
return 0;
}
/**
* Return the required string from the message table. Before returning the result,
* codepage translation from UTF8 to current codepage is performed.
*/
static const char*
get_string( struct loaded_domain *domain, u32 idx )
{
struct overflow_space_s *os;
char *p;
p = domain->data + SWAPIT(domain->must_swap, domain->trans_tab[idx].offset);
if (!domain->mapped[idx])
{
size_t plen, buflen;
char *buf;
domain->mapped[idx] = 1;
plen = strlen (p);
buf = utf8_to_native (p, plen, -1);
buflen = strlen (buf);
if (buflen <= plen){
strcpy (p, buf);
free( buf );
} else {
/* There is not enough space for the translation - store it
in the overflow_space else and mark that in the mapped
array. Because we expect that this won't happen too
often, we use a simple linked list. */
os = malloc (sizeof *os + buflen);
if (os)
{
os->idx = idx;
strcpy (os->d, buf);
os->next = domain->overflow_space;
domain->overflow_space = os;
p = os->d;
}
else
p = "ERROR in GETTEXT MALLOC";
free (buf);
}
}
else if (domain->mapped[idx] == 2)
{ /* We need to get the string from the overflow_space. */
for (os=domain->overflow_space; os; os = os->next)
if (os->idx == idx)
return (const char*)os->d;
p = "ERROR in GETTEXT\n";
}
return (const char*)p;
}
/**
* This is the translation function itself.
*/
char *
gettext( char *msgid )
{
struct loaded_domain *domain;
size_t act = 0;
size_t top, bottom;
if( !(domain = the_domain) )
goto not_found;
/* Locate the MSGID and its translation. */
if( domain->hash_size > 2 && domain->hash_tab ) {
/* Use the hashing table. */
u32 len = strlen (msgid);
u32 hash_val = hash_string (msgid);
u32 idx = hash_val % domain->hash_size;
u32 incr = 1 + (hash_val % (domain->hash_size - 2));
u32 nstr = SWAPIT (domain->must_swap, domain->hash_tab[idx]);
if ( !nstr ) /* Hash table entry is empty. */
goto not_found;
if( SWAPIT(domain->must_swap,
domain->orig_tab[nstr - 1].length) == len
&& !strcmp( msgid,
domain->data + SWAPIT(domain->must_swap,
domain->orig_tab[nstr - 1].offset)) )
return (char *)get_string( domain, nstr - 1 );
for(;;) {
if (idx >= domain->hash_size - incr)
idx -= domain->hash_size - incr;
else
idx += incr;
nstr = SWAPIT(domain->must_swap, domain->hash_tab[idx]);
if( !nstr )
goto not_found; /* Hash table entry is empty. */
if ( SWAPIT(domain->must_swap,
domain->orig_tab[nstr - 1].length) == len
&& !strcmp (msgid,
domain->data + SWAPIT(domain->must_swap,
domain->orig_tab[nstr - 1].offset)))
return (char *)get_string( domain, nstr-1 );
}
/* NOTREACHED */
}
/* Now we try the default method: binary search in the sorted
array of messages. */
bottom = 0;
top = domain->nstrings;
while( bottom < top ) {
int cmp_val;
act = (bottom + top) / 2;
cmp_val = strcmp(msgid, domain->data
+ SWAPIT(domain->must_swap,
domain->orig_tab[act].offset));
if (cmp_val < 0)
top = act;
else if (cmp_val > 0)
bottom = act + 1;
else
return (char *)get_string( domain, act );
}
not_found:
return msgid;
}
/**
* This is the main initialization function for simple gettext. The message file is
* opened and read into memory. The function must be called once before translating
* a string.
*
* The message files are expected to be in a directory named in the UNIXish form en_US
* in the path passed to this function. The filename is expected to be domainname.mo
*
* \param domainname IN domain
* \param dirname IN directory for the message files
* \return always NULL
*/
char *
bindtextdomain( char *domainname, char *dirname )
{
char *loc;
char *dir;
/* get thread's locale in UNIXish style eg. en_US */
loc = g_win32_getlocale();
/* make sure that path does not end with trailing slash */
if( dirname[ strlen(dirname) ] == '/' )
dirname[ strlen(dirname) ] = '\0';
/* allocate buffer for filename, 20 bytes should be enough for extension etc. */
dir = malloc( strlen( domainname ) + strlen( dirname ) + strlen( loc ) + 20 );
if( dir ) {
/* create the full filename */
sprintf( dir, "%s/%s/LC_MESSAGES/%s.mo", dirname, loc, domainname );
/* load the file */
set_gettext_file( dir, NULL );
free( dir );
}
free( loc );
return( NULL );
}
/**
* This is a dummy function to maintain source code compatibility
* with other implementations of gettext.
* For this implementation, UTF-8 input encoding is assumed
*
* \param domainname IN domain
* \param codeset In codeset
* \return always NULL
*/
char *
bind_textdomain_codeset(char *domainname, char *codeset )
{
return( NULL );
}
/**
* This is a dummy function to maintain source code compatibility
* with other implementations of gettext.
*
* \param domainname IN domain
* \return always NULL
*/
char *
textdomain( char *domainname )
{
return( NULL );
}
#endif /* USE_SIMPLE_GETTEXT */
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