trunk/Src/wptNLS.cpp

/* wptNLS.cpp - W32 Native Language Support
 *      Copyright (C) 2001-2003, 2006, 2008, 2009, 2012 Timo Schulz
 *      Copyright (C) 1995-1999 Free Software Foundation, Inc.
 *
 * This code is a stripped down version of simple-gettext.c 
 * written by by Ulrich Drepper from the GPG project.
 *
 * WinPT 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.
 *  
 * WinPT 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.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <windows.h>

#include "wptNLS.h"
#include "wptTypes.h"
#include "wptUtil.h"
#include "wptW32API.h"
#include "wptVersion.h"
#include "StringBuffer.h"

/* 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

#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

/* Header for binary .mo file format.  */
struct mo_file_header {
    DWORD magic;            /* The magic number.        */
    DWORD revision;         /* The revision number of the file format.  */
    DWORD nstrings;         /* The number of strings pairs.  */
    DWORD orig_tab_offset;  /* Offset of table with start offsets of original 
                                strings.  */
    DWORD trans_tab_offset;   /* Offset of table with start offsets of translation
                             strings.  */
    DWORD hash_tab_size;        /* Size of hashing table.  */
    DWORD hash_tab_offset;    /* Offset of first hashing entry.  */
};

struct string_desc {
    DWORD length; /* Length of addressed string.  */  
    DWORD offset; /* Offset of string in file.  */
};

struct loaded_domain_s {
    /* Full file name to the MO file */
    char *file_name;
    /* Last modification date of the MO file */
    time_t modify_time;
    
    char *data;
    int must_swap;
    DWORD nstrings;
    char *mapped;
    struct string_desc *orig_tab;
    struct string_desc *trans_tab;
    DWORD hash_size;
    DWORD *hash_tab;
};
typedef struct loaded_domain_s *gettext_domain_t;

/* List of all available languages. */
struct lang_table_s lang_list[] = {
    {"en", "English",   LANG_ENGLISH},
    {"de", "German",    LANG_GERMAN},
    {"ru", "Russian",   LANG_RUSSIAN},
    {"nl", "Dutch",     LANG_DUTCH},
    {NULL, NULL, 0}
};


/* The current gettext domain. */
static gettext_domain_t the_domain;


/* Return TRUE if the native user language is not English 
   and thus, gettext support is available */
static bool
gettext_is_required (void)
{
    LANGID lang = GetUserDefaultLangID ();
    if (PRIMARYLANGID (lang) == LANG_ENGLISH)
        return false;
    return true;
}


static DWORD
do_swap_u32 (DWORD i)
{
    return (i << 24) | ((i & 0xff00) << 8) | ((i >> 8) & 0xff00) | (i >> 24);
}


/* 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 DWORD
hash_string (const char *str_param)
{
    DWORD hval, g;
    const char *str = str_param;

    hval = 0;
    while (*str != '\0') {
        hval <<= 4;
        hval += (DWORD) *str++; 
        g = hval & ((DWORD) 0xf << (HASHWORDBITS - 4));
        if (g != 0) {
            hval ^= g >> (HASHWORDBITS - 8);
            hval ^= g;  
        }
    }
    return hval;
}


static gettext_domain_t
load_domain (const char *filename)
{
    FILE *fp;
    size_t size;
    struct stat st;
    struct mo_file_header *data = NULL;
    gettext_domain_t domain = NULL;
    size_t to_read;
    char *read_ptr;

    fp = fopen (filename, "rb");
    if (!fp)
       return NULL;
    /* we must know about the size of the file */
    if (fstat (fileno(fp), &st) ||
        (size = (size_t)st.st_size) != (size_t)st.st_size ||
        size < sizeof (struct mo_file_header)) {
        fclose (fp);
        return NULL;
    }

    data = (struct mo_file_header *) malloc (size);
    if (!data)
        BUG (0);

    to_read = size;
    read_ptr = (char *) data;
    do {
        size_t 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 = (struct loaded_domain_s *)calloc (1, sizeof *domain);
    if (!domain)
        BUG (0);
    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 = (DWORD *)  
              ((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 = (char *)calloc (1, domain->nstrings);
    if (!domain->mapped) 
        BUG (0);
    
    domain->file_name = strdup (filename);
    domain->modify_time = st.st_mtime;
    return domain;
}


/* To avoid problems that the current directory is not the
 * same folder the WinPT.exe is located in, we extract the
 * module directory.
 */
char*
get_module_dir (char *buf, DWORD buflen)
{
    if (buflen < 1 || !GetModuleFileName (glob_hinst, buf, buflen-1))
        return NULL;

    size_t pos = strlen (buf);
    while (pos > 0 && buf[--pos] != '\\')
        ;
    buf[pos + 1] = '\0';
    return buf;
}


/* Returns a localisation name for a specific resource (file).
 * For instance, lang=DE and file=winpt.chm will become winpt.DE.chm
 */
char*
get_locale_name (const char *file)
{
    const char *lang = gettext_get_langid ();
    char buf[MAX_PATH+1];
    
    char *p = strrchr (file, '.');
    if (p == NULL) {
        p = new char[strlen(file)+strlen(lang)+2+1];
        sprintf (p, "%s.%s", file, lang);
        return p;
    }
    char *name = substr (file, 0, p - file);
    char *ext = substr (file, p - file + 1, strlen(file));
    p = get_module_dir (buf, MAX_PATH);
    if (!p)
        BUG (NULL);
    StringBuffer s = p;
    s = s + name + "." + lang + "." + ext;
    p = s.getBufferCopy();
    free_if_alloc (name);
    free_if_alloc (ext);
    return p;
}


/* Deallocate static resources. */
void
gettext_free_current_domain (void)
{
    if (the_domain == NULL)
        return;
    free (the_domain->data);
    free (the_domain->mapped);
    free (the_domain->file_name);
    free (the_domain);
    the_domain = NULL;
}


/* Replace and release the old domain and assign a new domain then */
static void
gettext_update_domain (gettext_domain_t new_dom)
{
    gettext_free_current_domain ();
    the_domain = new_dom;
}


char* get_reg_entry_mo (void);

/* Fallback code which is used when no new NLS file were found.
   Then we read the MODir registry key and check if a file named 
   'winpt.mo' exists in this directory. */
static gettext_domain_t
load_modir_domain (void)
{        
    char *modir = get_reg_entry_mo ();
    if (!modir)
        return NULL;
    if (dir_exist_check (modir)) {
        free_if_alloc (modir);
        return NULL;
    }
    StringBuffer s = modir;
    if (modir[strlen (modir)-1] != '\\')
        s += "\\";
    s += "winpt.mo";
    
    gettext_domain_t domain = NULL;
    const char *fname = s.getBuffer();
    if (!file_exist_check (fname))
        domain = load_domain (fname);
    free_if_alloc (modir);
    return domain;
}


/* Try to load the user domain, either from
   the WinPT.exe directory or from the registry */
void
gettext_set_user_domain (void)
{
    if (!gettext_is_required ())
        return;
    
    gettext_domain_t domain = NULL;
    char *file = get_locale_name ("winpt.mo");
    if (file && !file_exist_check (file))
        domain = load_domain (file);
    else
        domain = load_modir_domain ();
    free_if_alloc (file);
    gettext_update_domain (domain);
}


int
gettext_domain_needs_refresh (void)
{
    struct stat st;
    
    if (the_domain == NULL || stat (the_domain->file_name, &st))
        return 0;
    /* '1' means that the MO file were modified in the mean time
       and the application should reload the domain. */
    if (st.st_mtime != the_domain->modify_time)
        return 1;
    
    return 0;
}

static const char*
get_string (gettext_domain_t domain, DWORD idx)
{
    char *p = domain->data + SWAPIT(domain->must_swap,
                                    domain->trans_tab[idx].offset);
    if (!domain->mapped[idx])
        domain->mapped[idx] = 1;
    /* FIXME: all text is in UTF-8 and need to be converted to
       the locale charset. But the caller does not free the data and
       thus we will get a leak */
    return (const char *)p;
}


const char *
gettext (const char *msgid)
{
    size_t act = 0;
    size_t top, bottom;
    
    gettext_domain_t domain = the_domain;
    if (domain == NULL)
        goto not_found;

    /* Locate the MSGID and its translation.  */
    if (domain->hash_size > 2 && domain->hash_tab) {
        /* Use the hashing table.  */           
        DWORD len = strlen (msgid);     
        DWORD hash_val = hash_string (msgid);   
        DWORD idx = hash_val % domain->hash_size;       
        DWORD incr = 1 + (hash_val % (domain->hash_size - 2));  
        DWORD 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 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 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) {      
        act = (bottom + top) / 2;       
        int 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 get_string (domain, act);
    }

not_found:
    return msgid;
}


/* Map the user specific language ID to a gettext conform language string.
   English "en" is defined as the fallback.
   Example: LANG_GERMAN -> "de" */
const char*
gettext_get_langid (void)
{
    LANGID lang = GetUserDefaultLangID ();
    
    for (int i=0; lang_list[i].id; i++) {
        if (PRIMARYLANGID (lang) == lang_list[i].langid)
            return lang_list[i].id;
    }
    
    return "en";
}


/* Take a table with control item IDs and their translation
   and set each text to the translated value. */
void
gettext_localize_dialog (HWND dlg, struct gettext_tab_s *tab, const char *title)
{
    for (int i=0; tab[i].trans != NULL; i++)
        SetDlgItemText (dlg, tab[i].ctlid, tab[i].trans);
    if (title != NULL)
        SetWindowText (dlg, title);
}
1	twoaday	273	/* wptNLS.cpp - W32 Native Language Support
2	twoaday	398	* Copyright (C) 2001-2003, 2006, 2008, 2009, 2012 Timo Schulz
3	twoaday	273	* Copyright (C) 1995-1999 Free Software Foundation, Inc.
4			*
5	twoaday	278	* This code is a stripped down version of simple-gettext.c
6			* written by by Ulrich Drepper from the GPG project.
7	twoaday	273	*
8			* WinPT is free software; you can redistribute it and/or
9			* modify it under the terms of the GNU General Public License
10			* as published by the Free Software Foundation; either version 2
11			* of the License, or (at your option) any later version.
12			*
13			* WinPT is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16			* General Public License for more details.
17			*/
18			#ifdef HAVE_CONFIG_H
19			#include <config.h>
20			#endif
21
22			#include <stdio.h>
23			#include <string.h>
24			#include <sys/stat.h>
25	twoaday	328	#include <time.h>
26	twoaday	273	#include <windows.h>
27
28			#include "wptNLS.h"
29	twoaday	278	#include "wptTypes.h"
30	twoaday	328	#include "wptUtil.h"
31			#include "wptW32API.h"
32			#include "wptVersion.h"
33			#include "StringBuffer.h"
34	twoaday	273
35			/* The magic number of the GNU message catalog format. */
36			#define MAGIC 0x950412de
37			#define MAGIC_SWAPPED 0xde120495
38
39	twoaday	398	/* Revision number of the currently used .mo (binary) file format. */
40	twoaday	273	#define MO_REVISION_NUMBER 0
41
42			#define SWAPIT(flag, data) ((flag) ? do_swap_u32(data) : (data) )
43
44
45	twoaday	398	/* We assume to have `unsigned long int' value with at least 32 bits. */
46	twoaday	273	#define HASHWORDBITS 32
47
48			/* Header for binary .mo file format. */
49			struct mo_file_header {
50			DWORD magic; /* The magic number. */
51			DWORD revision; /* The revision number of the file format. */
52			DWORD nstrings; /* The number of strings pairs. */
53			DWORD orig_tab_offset; /* Offset of table with start offsets of original
54			strings. */
55			DWORD trans_tab_offset; /* Offset of table with start offsets of translation
56			strings. */
57			DWORD hash_tab_size; /* Size of hashing table. */
58			DWORD hash_tab_offset; /* Offset of first hashing entry. */
59			};
60
61			struct string_desc {
62			DWORD length; /* Length of addressed string. */
63			DWORD offset; /* Offset of string in file. */
64			};
65
66	twoaday	328	struct loaded_domain_s {
67	twoaday	372	/* Full file name to the MO file */
68	twoaday	328	char *file_name;
69	twoaday	372	/* Last modification date of the MO file */
70	twoaday	328	time_t modify_time;
71	twoaday	372
72	twoaday	328	char *data;
73			int must_swap;
74			DWORD nstrings;
75			char *mapped;
76			struct string_desc *orig_tab;
77			struct string_desc *trans_tab;
78			DWORD hash_size;
79			DWORD *hash_tab;
80	twoaday	273	};
81	twoaday	328	typedef struct loaded_domain_s *gettext_domain_t;
82	twoaday	273
83			/* List of all available languages. */
84			struct lang_table_s lang_list[] = {
85			{"en", "English", LANG_ENGLISH},
86			{"de", "German", LANG_GERMAN},
87	twoaday	328	{"ru", "Russian", LANG_RUSSIAN},
88	twoaday	398	{"nl", "Dutch", LANG_DUTCH},
89	twoaday	328	{NULL, NULL, 0}
90	twoaday	273	};
91
92	twoaday	278
93	twoaday	328	/* The current gettext domain. */
94			static gettext_domain_t the_domain;
95	twoaday	273
96
97	twoaday	368	/* Return TRUE if the native user language is not English
98			and thus, gettext support is available */
99			static bool
100			gettext_is_required (void)
101			{
102			LANGID lang = GetUserDefaultLangID ();
103			if (PRIMARYLANGID (lang) == LANG_ENGLISH)
104			return false;
105			return true;
106			}
107
108
109	twoaday	273	static DWORD
110			do_swap_u32 (DWORD i)
111			{
112			return (i << 24) \| ((i & 0xff00) << 8) \| ((i >> 8) & 0xff00) \| (i >> 24);
113			}
114
115
116			/* The so called `hashpjw' function by P.J. Weinberger
117			[see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
118			1986, 1987 Bell Telephone Laboratories, Inc.] */
119			static DWORD
120			hash_string (const char *str_param)
121			{
122			DWORD hval, g;
123			const char *str = str_param;
124
125			hval = 0;
126			while (*str != '\0') {
127			hval <<= 4;
128			hval += (DWORD) *str++;
129			g = hval & ((DWORD) 0xf << (HASHWORDBITS - 4));
130			if (g != 0) {
131			hval ^= g >> (HASHWORDBITS - 8);
132			hval ^= g;
133			}
134			}
135			return hval;
136			}
137
138	twoaday	278
139	twoaday	328	static gettext_domain_t
140	twoaday	278	load_domain (const char *filename)
141	twoaday	273	{
142			FILE *fp;
143			size_t size;
144			struct stat st;
145			struct mo_file_header *data = NULL;
146	twoaday	328	gettext_domain_t domain = NULL;
147	twoaday	273	size_t to_read;
148			char *read_ptr;
149
150	twoaday	278	fp = fopen (filename, "rb");
151			if (!fp)
152			return NULL;
153	twoaday	273	/* we must know about the size of the file */
154	twoaday	328	if (fstat (fileno(fp), &st) \|\|
155			(size = (size_t)st.st_size) != (size_t)st.st_size \|\|
156			size < sizeof (struct mo_file_header)) {
157			fclose (fp);
158	twoaday	273	return NULL;
159			}
160
161	twoaday	278	data = (struct mo_file_header *) malloc (size);
162			if (!data)
163			BUG (0);
164	twoaday	273
165			to_read = size;
166			read_ptr = (char *) data;
167			do {
168	twoaday	328	size_t nb = fread (read_ptr, 1, to_read, fp);
169			if (nb < to_read) {
170	twoaday	273	fclose (fp);
171	twoaday	368	free (data);
172	twoaday	328	return NULL; /* read error */
173	twoaday	273	}
174			read_ptr += nb;
175			to_read -= nb;
176	twoaday	328	} while (to_read > 0);
177	twoaday	273	fclose (fp);
178
179	twoaday	372	/* Using the magic number we can test whether it really is a message catalog file. */
180	twoaday	328	if (data->magic != MAGIC && data->magic != MAGIC_SWAPPED) {
181	twoaday	273	/* The magic number is wrong: not a message catalog file. */
182	twoaday	328	free (data);
183	twoaday	273	return NULL;
184			}
185
186	twoaday	328	domain = (struct loaded_domain_s )calloc (1, sizeof domain);
187	twoaday	278	if (!domain)
188			BUG (0);
189	twoaday	273	domain->data = (char *) data;
190			domain->must_swap = data->magic != MAGIC;
191
192			/* Fill in the information about the available tables. */
193	twoaday	328	switch (SWAPIT(domain->must_swap, data->revision)) {
194	twoaday	273	case 0:
195	twoaday	328	domain->nstrings = SWAPIT (domain->must_swap, data->nstrings);
196	twoaday	273	domain->orig_tab = (struct string_desc *)
197	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->orig_tab_offset));
198	twoaday	273	domain->trans_tab = (struct string_desc *)
199	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->trans_tab_offset));
200			domain->hash_size = SWAPIT (domain->must_swap, data->hash_tab_size);
201	twoaday	273	domain->hash_tab = (DWORD *)
202	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->hash_tab_offset));
203	twoaday	273	break;
204
205			default: /* This is an invalid revision. */
206	twoaday	328	free (data);
207			free (domain);
208	twoaday	273	return NULL;
209			}
210
211			/* allocate an array to keep track of code page mappings */
212	twoaday	368	domain->mapped = (char *)calloc (1, domain->nstrings);
213	twoaday	278	if (!domain->mapped)
214			BUG (0);
215	twoaday	328
216			domain->file_name = strdup (filename);
217			domain->modify_time = st.st_mtime;
218	twoaday	273	return domain;
219	twoaday	278	}
220	twoaday	273
221
222	twoaday	328	/* To avoid problems that the current directory is not the
223			* same folder the WinPT.exe is located in, we extract the
224			* module directory.
225			*/
226			char*
227			get_module_dir (char *buf, DWORD buflen)
228			{
229			if (buflen < 1 \|\| !GetModuleFileName (glob_hinst, buf, buflen-1))
230			return NULL;
231
232	twoaday	368	size_t pos = strlen (buf);
233	twoaday	328	while (pos > 0 && buf[--pos] != '\\')
234			;
235	twoaday	372	buf[pos + 1] = '\0';
236	twoaday	328	return buf;
237			}
238
239
240			/* Returns a localisation name for a specific resource (file).
241	twoaday	368	* For instance, lang=DE and file=winpt.chm will become winpt.DE.chm
242	twoaday	328	*/
243			char*
244			get_locale_name (const char *file)
245			{
246	twoaday	368	const char *lang = gettext_get_langid ();
247	twoaday	372	char buf[MAX_PATH+1];
248	twoaday	328
249	twoaday	372	char *p = strrchr (file, '.');
250	twoaday	328	if (p == NULL) {
251			p = new char[strlen(file)+strlen(lang)+2+1];
252			sprintf (p, "%s.%s", file, lang);
253			return p;
254			}
255	twoaday	372	char *name = substr (file, 0, p - file);
256			char *ext = substr (file, p - file + 1, strlen(file));
257	twoaday	328	p = get_module_dir (buf, MAX_PATH);
258			if (!p)
259			BUG (NULL);
260			StringBuffer s = p;
261			s = s + name + "." + lang + "." + ext;
262			p = s.getBufferCopy();
263			free_if_alloc (name);
264			free_if_alloc (ext);
265			return p;
266			}
267
268
269	twoaday	278	/* Deallocate static resources. */
270			void
271			gettext_free_current_domain (void)
272			{
273	twoaday	328	if (the_domain == NULL)
274	twoaday	278	return;
275			free (the_domain->data);
276			free (the_domain->mapped);
277	twoaday	328	free (the_domain->file_name);
278	twoaday	278	free (the_domain);
279			the_domain = NULL;
280			}
281
282
283	twoaday	368	/* Replace and release the old domain and assign a new domain then */
284			static void
285			gettext_update_domain (gettext_domain_t new_dom)
286			{
287			gettext_free_current_domain ();
288			the_domain = new_dom;
289			}
290
291
292	twoaday	328	char* get_reg_entry_mo (void);
293
294	twoaday	368	/* Fallback code which is used when no new NLS file were found.
295			Then we read the MODir registry key and check if a file named
296			'winpt.mo' exists in this directory. */
297	twoaday	328	static gettext_domain_t
298			load_modir_domain (void)
299	twoaday	368	{
300	twoaday	366	char *modir = get_reg_entry_mo ();
301	twoaday	328	if (!modir)
302			return NULL;
303			if (dir_exist_check (modir)) {
304			free_if_alloc (modir);
305			return NULL;
306			}
307	twoaday	366	StringBuffer s = modir;
308	twoaday	328	if (modir[strlen (modir)-1] != '\\')
309			s += "\\";
310			s += "winpt.mo";
311	twoaday	366
312	twoaday	368	gettext_domain_t domain = NULL;
313	twoaday	328	const char *fname = s.getBuffer();
314			if (!file_exist_check (fname))
315			domain = load_domain (fname);
316			free_if_alloc (modir);
317			return domain;
318			}
319
320
321	twoaday	368	/* Try to load the user domain, either from
322			the WinPT.exe directory or from the registry */
323	twoaday	372	void
324	twoaday	328	gettext_set_user_domain (void)
325			{
326	twoaday	368	if (!gettext_is_required ())
327	twoaday	372	return;
328	twoaday	368
329	twoaday	328	gettext_domain_t domain = NULL;
330			char *file = get_locale_name ("winpt.mo");
331			if (file && !file_exist_check (file))
332			domain = load_domain (file);
333			else
334			domain = load_modir_domain ();
335			free_if_alloc (file);
336	twoaday	368	gettext_update_domain (domain);
337	twoaday	328	}
338
339
340			int
341			gettext_domain_needs_refresh (void)
342			{
343			struct stat st;
344
345			if (the_domain == NULL \|\| stat (the_domain->file_name, &st))
346			return 0;
347			/* '1' means that the MO file were modified in the mean time
348			and the application should reload the domain. */
349			if (st.st_mtime != the_domain->modify_time)
350			return 1;
351
352			return 0;
353			}
354
355	twoaday	273	static const char*
356	twoaday	328	get_string (gettext_domain_t domain, DWORD idx)
357	twoaday	273	{
358			char *p = domain->data + SWAPIT(domain->must_swap,
359			domain->trans_tab[idx].offset);
360	twoaday	328	if (!domain->mapped[idx])
361			domain->mapped[idx] = 1;
362	twoaday	368	/* FIXME: all text is in UTF-8 and need to be converted to
363			the locale charset. But the caller does not free the data and
364			thus we will get a leak */
365	twoaday	366	return (const char *)p;
366	twoaday	273	}
367
368
369			const char *
370	twoaday	328	gettext (const char *msgid)
371	twoaday	273	{
372			size_t act = 0;
373			size_t top, bottom;
374	twoaday	328
375	twoaday	366	gettext_domain_t domain = the_domain;
376	twoaday	328	if (domain == NULL)
377	twoaday	273	goto not_found;
378
379			/* Locate the MSGID and its translation. */
380	twoaday	328	if (domain->hash_size > 2 && domain->hash_tab) {
381	twoaday	273	/* Use the hashing table. */
382			DWORD len = strlen (msgid);
383			DWORD hash_val = hash_string (msgid);
384			DWORD idx = hash_val % domain->hash_size;
385			DWORD incr = 1 + (hash_val % (domain->hash_size - 2));
386			DWORD nstr = SWAPIT (domain->must_swap, domain->hash_tab[idx]);
387
388	twoaday	328	if (!nstr) /* Hash table entry is empty. */
389	twoaday	273	goto not_found;
390	twoaday	328
391			if (SWAPIT(domain->must_swap,
392	twoaday	273	domain->orig_tab[nstr - 1].length) == len
393	twoaday	328	&& !strcmp (msgid,
394			domain->data + SWAPIT (domain->must_swap,
395			domain->orig_tab[nstr - 1].offset)))
396			return get_string (domain, nstr - 1);
397	twoaday	273	for(;;) {
398			if (idx >= domain->hash_size - incr)
399			idx -= domain->hash_size - incr;
400			else
401			idx += incr;
402	twoaday	366	nstr = SWAPIT (domain->must_swap, domain->hash_tab[idx]);
403	twoaday	328	if (!nstr)
404	twoaday	273	goto not_found; /* Hash table entry is empty. */
405
406	twoaday	328	if (SWAPIT (domain->must_swap,
407			domain->orig_tab[nstr - 1].length) == len
408			&& !strcmp (msgid,
409			domain->data + SWAPIT (domain->must_swap,
410			domain->orig_tab[nstr - 1].offset)))
411
412			return get_string (domain, nstr-1);
413	twoaday	273	} /* NOTREACHED */
414			}
415
416			/* Now we try the default method: binary search in the sorted
417			array of messages. */
418			bottom = 0;
419			top = domain->nstrings;
420	twoaday	366	while (bottom < top) {
421	twoaday	273	act = (bottom + top) / 2;
422	twoaday	366	int cmp_val = strcmp (msgid, domain->data + SWAPIT(domain->must_swap,
423			domain->orig_tab[act].offset));
424	twoaday	273	if (cmp_val < 0)
425			top = act;
426			else if (cmp_val > 0)
427			bottom = act + 1;
428	twoaday	328	else
429			return get_string (domain, act);
430	twoaday	273	}
431
432			not_found:
433			return msgid;
434			}
435
436
437	twoaday	368
438	twoaday	273	/* Map the user specific language ID to a gettext conform language string.
439	twoaday	368	English "en" is defined as the fallback.
440	twoaday	273	Example: LANG_GERMAN -> "de" */
441			const char*
442	twoaday	278	gettext_get_langid (void)
443	twoaday	273	{
444	twoaday	366	LANGID lang = GetUserDefaultLangID ();
445	twoaday	368
446	twoaday	328	for (int i=0; lang_list[i].id; i++) {
447	twoaday	273	if (PRIMARYLANGID (lang) == lang_list[i].langid)
448			return lang_list[i].id;
449			}
450	twoaday	368
451			return "en";
452	twoaday	273	}
453
454
455			/* Take a table with control item IDs and their translation
456			and set each text to the translated value. */
457			void
458	twoaday	366	gettext_localize_dialog (HWND dlg, struct gettext_tab_s tab, const char title)
459	twoaday	273	{
460	twoaday	328	for (int i=0; tab[i].trans != NULL; i++)
461	twoaday	273	SetDlgItemText (dlg, tab[i].ctlid, tab[i].trans);
462	twoaday	328	if (title != NULL)
463	twoaday	273	SetWindowText (dlg, title);
464			}