trunk/Src/wptNLS.cpp

/* wptNLS.cpp - W32 Native Language Support
 *      Copyright (C) 2001-2003, 2006, 2008, 2009 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 {
    char *file_name;
    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},
    {NULL, NULL, 0}
};


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


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;
}


/* Missing W32 functions. */
static char*
w32_stpcpy (char *a, const char *b)
{
    while (*b)
        *a++ = *b++;
    *a = 0;
    return (char*)a;
}


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;
}


/* Returns a string representation of the users system language
 * if we support it, 'en' otherwise.
 */
static const char*
get_user_langid (void)
{
    int lang = GetUserDefaultLangID() & 511;
    
    for (int i=0; lang_list[i].id != NULL; i++) {
        if (lang == lang_list[i].langid)
            return lang_list[i].id;
    }
    return "en";
}


/* 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)
{
    int pos;
    
    if (buflen < 1 || !GetModuleFileName (glob_hinst, buf, buflen-1))
        return NULL;

    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 = get_user_langid();
    char *name, *ext;
    char *p, buf[MAX_PATH+1];
    
    p = strrchr (file, '.');
    if (p == NULL) {
        p = new char[strlen(file)+strlen(lang)+2+1];
        sprintf (p, "%s.%s", file, lang);
        return p;
    }
    name = substr (file, 0, p-file);
    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;
}


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)
{
    gettext_domain_t domain = NULL;
    StringBuffer s;
    char *modir;
    
    modir = get_reg_entry_mo ();
    if (!modir)
        return NULL;
    if (dir_exist_check (modir)) {
        free_if_alloc (modir);
        return NULL;
    }
    s = modir;
    if (modir[strlen (modir)-1] != '\\')
        s += "\\";
    s += "winpt.mo";
    const char *fname = s.getBuffer();
    if (!file_exist_check (fname))
        domain = load_domain (fname);
    free_if_alloc (modir);
    return domain;
}


int
gettext_set_user_domain (void)
{
    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_free_current_domain ();    
    the_domain = domain;
    return 0;
}


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;
}

/* Set the file used for translations. Pass a NULL to disable translation.
   A new filename may be set at anytime. */
int
gettext_set_file (const char *filename, const char *nls_dir)
{
    gettext_domain_t domain = NULL;

    if (filename && *filename) {
        if (filename[1] == ':' && filename[2] == '\\')
            domain = load_domain (filename); /* absolute path - use it as is */
        else { /* relative path - append ".mo" and get dir from the environment */
            char *buf, *dir;
                
            dir = strdup (nls_dir);
            if (!dir)
                BUG (0);
            buf= (char *)malloc (strlen (dir) + strlen (filename)+1+3+1);
            strcpy (w32_stpcpy (w32_stpcpy (
                    w32_stpcpy (buf, dir), "\\"), filename),".mo");
            domain = load_domain(buf);
            free (buf);
            free (dir);
        }
        if (!domain)
            return -1;
    }

    gettext_free_current_domain ();
    the_domain = domain;
    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;
    return (const char*)p;
}


const char *
gettext (const char *msgid)
{
    gettext_domain_t domain;
    size_t act = 0;
    size_t top, bottom;
    
    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) {
        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 get_string (domain, act);
    }

not_found:
    return msgid;
}


/* Map the user specific language ID to a gettext conform language string.
   Example: LANG_GERMAN -> "de" */
const char*
gettext_get_langid (void)
{
    LANGID lang;

    lang = GetUserDefaultLangID ();
    if (PRIMARYLANGID (lang) == LANG_ENGLISH)
        return NULL;

    for (int i=0; lang_list[i].id; i++) {
        if (PRIMARYLANGID (lang) == lang_list[i].langid)
            return lang_list[i].id;
    }
    return NULL;
}


/* 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	328	* Copyright (C) 2001-2003, 2006, 2008, 2009 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			/* Revision number of the currently used .mo (binary) file format. */
40			#define MO_REVISION_NUMBER 0
41
42			#define SWAPIT(flag, data) ((flag) ? do_swap_u32(data) : (data) )
43
44
45			/* We assume to have `unsigned long int' value with at least 32 bits. */
46			#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			char *file_name;
68			time_t modify_time;
69			char *data;
70			int must_swap;
71			DWORD nstrings;
72			char *mapped;
73			struct string_desc *orig_tab;
74			struct string_desc *trans_tab;
75			DWORD hash_size;
76			DWORD *hash_tab;
77	twoaday	273	};
78	twoaday	328	typedef struct loaded_domain_s *gettext_domain_t;
79	twoaday	273
80			/* List of all available languages. */
81			struct lang_table_s lang_list[] = {
82			{"en", "English", LANG_ENGLISH},
83			{"de", "German", LANG_GERMAN},
84	twoaday	328	{"ru", "Russian", LANG_RUSSIAN},
85			{NULL, NULL, 0}
86	twoaday	273	};
87
88	twoaday	278
89	twoaday	328	/* The current gettext domain. */
90			static gettext_domain_t the_domain;
91	twoaday	273
92
93			static DWORD
94			do_swap_u32 (DWORD i)
95			{
96			return (i << 24) \| ((i & 0xff00) << 8) \| ((i >> 8) & 0xff00) \| (i >> 24);
97			}
98
99
100			/* The so called `hashpjw' function by P.J. Weinberger
101			[see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
102			1986, 1987 Bell Telephone Laboratories, Inc.] */
103			static DWORD
104			hash_string (const char *str_param)
105			{
106			DWORD hval, g;
107			const char *str = str_param;
108
109			hval = 0;
110			while (*str != '\0') {
111			hval <<= 4;
112			hval += (DWORD) *str++;
113			g = hval & ((DWORD) 0xf << (HASHWORDBITS - 4));
114			if (g != 0) {
115			hval ^= g >> (HASHWORDBITS - 8);
116			hval ^= g;
117			}
118			}
119			return hval;
120			}
121
122	twoaday	278
123	twoaday	273	/* Missing W32 functions. */
124			static char*
125	twoaday	328	w32_stpcpy (char a, const char b)
126	twoaday	273	{
127			while (*b)
128			a++ = b++;
129			*a = 0;
130			return (char*)a;
131			}
132
133
134	twoaday	328	static gettext_domain_t
135	twoaday	278	load_domain (const char *filename)
136	twoaday	273	{
137			FILE *fp;
138			size_t size;
139			struct stat st;
140			struct mo_file_header *data = NULL;
141	twoaday	328	gettext_domain_t domain = NULL;
142	twoaday	273	size_t to_read;
143			char *read_ptr;
144
145	twoaday	278	fp = fopen (filename, "rb");
146			if (!fp)
147			return NULL;
148	twoaday	273	/* we must know about the size of the file */
149	twoaday	328	if (fstat (fileno(fp), &st) \|\|
150			(size = (size_t)st.st_size) != (size_t)st.st_size \|\|
151			size < sizeof (struct mo_file_header)) {
152			fclose (fp);
153	twoaday	273	return NULL;
154			}
155
156	twoaday	278	data = (struct mo_file_header *) malloc (size);
157			if (!data)
158			BUG (0);
159	twoaday	273
160			to_read = size;
161			read_ptr = (char *) data;
162			do {
163	twoaday	328	size_t nb = fread (read_ptr, 1, to_read, fp);
164			if (nb < to_read) {
165	twoaday	273	fclose (fp);
166			free(data);
167	twoaday	328	return NULL; /* read error */
168	twoaday	273	}
169			read_ptr += nb;
170			to_read -= nb;
171	twoaday	328	} while (to_read > 0);
172	twoaday	273	fclose (fp);
173
174			/* Using the magic number we can test whether it really is a message
175			* catalog file. */
176	twoaday	328	if (data->magic != MAGIC && data->magic != MAGIC_SWAPPED) {
177	twoaday	273	/* The magic number is wrong: not a message catalog file. */
178	twoaday	328	free (data);
179	twoaday	273	return NULL;
180			}
181
182	twoaday	328	domain = (struct loaded_domain_s )calloc (1, sizeof domain);
183	twoaday	278	if (!domain)
184			BUG (0);
185	twoaday	273	domain->data = (char *) data;
186			domain->must_swap = data->magic != MAGIC;
187
188			/* Fill in the information about the available tables. */
189	twoaday	328	switch (SWAPIT(domain->must_swap, data->revision)) {
190	twoaday	273	case 0:
191	twoaday	328	domain->nstrings = SWAPIT (domain->must_swap, data->nstrings);
192	twoaday	273	domain->orig_tab = (struct string_desc *)
193	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->orig_tab_offset));
194	twoaday	273	domain->trans_tab = (struct string_desc *)
195	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->trans_tab_offset));
196			domain->hash_size = SWAPIT (domain->must_swap, data->hash_tab_size);
197	twoaday	273	domain->hash_tab = (DWORD *)
198	twoaday	328	((char *) data + SWAPIT (domain->must_swap, data->hash_tab_offset));
199	twoaday	273	break;
200
201			default: /* This is an invalid revision. */
202	twoaday	328	free (data);
203			free (domain);
204	twoaday	273	return NULL;
205			}
206
207			/* allocate an array to keep track of code page mappings */
208			domain->mapped = (char *)calloc( 1, domain->nstrings );
209	twoaday	278	if (!domain->mapped)
210			BUG (0);
211	twoaday	328
212			domain->file_name = strdup (filename);
213			domain->modify_time = st.st_mtime;
214	twoaday	273	return domain;
215	twoaday	278	}
216	twoaday	273
217
218	twoaday	328	/* Returns a string representation of the users system language
219			* if we support it, 'en' otherwise.
220			*/
221			static const char*
222			get_user_langid (void)
223			{
224			int lang = GetUserDefaultLangID() & 511;
225
226			for (int i=0; lang_list[i].id != NULL; i++) {
227			if (lang == lang_list[i].langid)
228			return lang_list[i].id;
229			}
230			return "en";
231			}
232
233
234			/* To avoid problems that the current directory is not the
235			* same folder the WinPT.exe is located in, we extract the
236			* module directory.
237			*/
238			char*
239			get_module_dir (char *buf, DWORD buflen)
240			{
241			int pos;
242
243			if (buflen < 1 \|\| !GetModuleFileName (glob_hinst, buf, buflen-1))
244			return NULL;
245
246			pos = strlen (buf);
247			while (pos > 0 && buf[--pos] != '\\')
248			;
249			buf[pos+1] = '\0';
250			return buf;
251			}
252
253
254			/* Returns a localisation name for a specific resource (file).
255			* For instance, lang=DE and file=winpt.chm will become
256			* winpt.DE.chm
257			*/
258			char*
259			get_locale_name (const char *file)
260			{
261			const char *lang = get_user_langid();
262			char name, ext;
263			char *p, buf[MAX_PATH+1];
264
265			p = strrchr (file, '.');
266			if (p == NULL) {
267			p = new char[strlen(file)+strlen(lang)+2+1];
268			sprintf (p, "%s.%s", file, lang);
269			return p;
270			}
271	twoaday	349	name = substr (file, 0, p-file);
272			ext = substr (file, p-file+1, strlen(file));
273	twoaday	328	p = get_module_dir (buf, MAX_PATH);
274			if (!p)
275			BUG (NULL);
276			StringBuffer s = p;
277			s = s + name + "." + lang + "." + ext;
278			p = s.getBufferCopy();
279			free_if_alloc (name);
280			free_if_alloc (ext);
281			return p;
282			}
283
284
285	twoaday	278	/* Deallocate static resources. */
286			void
287			gettext_free_current_domain (void)
288			{
289	twoaday	328	if (the_domain == NULL)
290	twoaday	278	return;
291			free (the_domain->data);
292			free (the_domain->mapped);
293	twoaday	328	free (the_domain->file_name);
294	twoaday	278	free (the_domain);
295			the_domain = NULL;
296			}
297
298
299	twoaday	328	char* get_reg_entry_mo (void);
300
301			/* Fallback code which is used when no new NLS file
302			* were found. Then we read the MODir registry key
303			* and check if a file named 'winpt.mo' exists in this
304			* directory.
305			*/
306			static gettext_domain_t
307			load_modir_domain (void)
308			{
309			gettext_domain_t domain = NULL;
310			StringBuffer s;
311			char *modir;
312
313			modir = get_reg_entry_mo ();
314			if (!modir)
315			return NULL;
316			if (dir_exist_check (modir)) {
317			free_if_alloc (modir);
318			return NULL;
319			}
320			s = modir;
321			if (modir[strlen (modir)-1] != '\\')
322			s += "\\";
323			s += "winpt.mo";
324			const char *fname = s.getBuffer();
325			if (!file_exist_check (fname))
326			domain = load_domain (fname);
327			free_if_alloc (modir);
328			return domain;
329			}
330
331
332			int
333			gettext_set_user_domain (void)
334			{
335			gettext_domain_t domain = NULL;
336			char *file = get_locale_name ("winpt.mo");
337			if (file && !file_exist_check (file))
338			domain = load_domain (file);
339			else
340			domain = load_modir_domain ();
341			free_if_alloc (file);
342			gettext_free_current_domain ();
343			the_domain = domain;
344			return 0;
345			}
346
347
348			int
349			gettext_domain_needs_refresh (void)
350			{
351			struct stat st;
352
353			if (the_domain == NULL \|\| stat (the_domain->file_name, &st))
354			return 0;
355			/* '1' means that the MO file were modified in the mean time
356			and the application should reload the domain. */
357			if (st.st_mtime != the_domain->modify_time)
358			return 1;
359
360			return 0;
361			}
362
363	twoaday	273	/* Set the file used for translations. Pass a NULL to disable translation.
364			A new filename may be set at anytime. */
365			int
366	twoaday	278	gettext_set_file (const char filename, const char nls_dir)
367	twoaday	273	{
368	twoaday	328	gettext_domain_t domain = NULL;
369	twoaday	273
370	twoaday	278	if (filename && *filename) {
371			if (filename[1] == ':' && filename[2] == '\\')
372			domain = load_domain (filename); /* absolute path - use it as is */
373	twoaday	273	else { /* relative path - append ".mo" and get dir from the environment */
374	twoaday	278	char buf, dir;
375	twoaday	273
376	twoaday	278	dir = strdup (nls_dir);
377			if (!dir)
378			BUG (0);
379			buf= (char *)malloc (strlen (dir) + strlen (filename)+1+3+1);
380			strcpy (w32_stpcpy (w32_stpcpy (
381	twoaday	328	w32_stpcpy (buf, dir), "\\"), filename),".mo");
382	twoaday	278	domain = load_domain(buf);
383			free (buf);
384			free (dir);
385	twoaday	273	}
386	twoaday	278	if (!domain)
387	twoaday	273	return -1;
388			}
389
390	twoaday	328	gettext_free_current_domain ();
391	twoaday	273	the_domain = domain;
392			return 0;
393			}
394
395
396			static const char*
397	twoaday	328	get_string (gettext_domain_t domain, DWORD idx)
398	twoaday	273	{
399			char *p = domain->data + SWAPIT(domain->must_swap,
400			domain->trans_tab[idx].offset);
401	twoaday	328	if (!domain->mapped[idx])
402			domain->mapped[idx] = 1;
403	twoaday	273	return (const char*)p;
404			}
405
406
407			const char *
408	twoaday	328	gettext (const char *msgid)
409	twoaday	273	{
410	twoaday	328	gettext_domain_t domain;
411	twoaday	273	size_t act = 0;
412			size_t top, bottom;
413	twoaday	328
414			domain = the_domain;
415			if (domain == NULL)
416	twoaday	273	goto not_found;
417
418			/* Locate the MSGID and its translation. */
419	twoaday	328	if (domain->hash_size > 2 && domain->hash_tab) {
420	twoaday	273	/* Use the hashing table. */
421			DWORD len = strlen (msgid);
422			DWORD hash_val = hash_string (msgid);
423			DWORD idx = hash_val % domain->hash_size;
424			DWORD incr = 1 + (hash_val % (domain->hash_size - 2));
425			DWORD nstr = SWAPIT (domain->must_swap, domain->hash_tab[idx]);
426
427	twoaday	328	if (!nstr) /* Hash table entry is empty. */
428	twoaday	273	goto not_found;
429	twoaday	328
430			if (SWAPIT(domain->must_swap,
431	twoaday	273	domain->orig_tab[nstr - 1].length) == len
432	twoaday	328	&& !strcmp (msgid,
433			domain->data + SWAPIT (domain->must_swap,
434			domain->orig_tab[nstr - 1].offset)))
435			return get_string (domain, nstr - 1);
436	twoaday	273	for(;;) {
437			if (idx >= domain->hash_size - incr)
438			idx -= domain->hash_size - incr;
439			else
440			idx += incr;
441			nstr = SWAPIT(domain->must_swap, domain->hash_tab[idx]);
442	twoaday	328	if (!nstr)
443	twoaday	273	goto not_found; /* Hash table entry is empty. */
444
445	twoaday	328	if (SWAPIT (domain->must_swap,
446			domain->orig_tab[nstr - 1].length) == len
447			&& !strcmp (msgid,
448			domain->data + SWAPIT (domain->must_swap,
449			domain->orig_tab[nstr - 1].offset)))
450
451			return get_string (domain, nstr-1);
452	twoaday	273	} /* NOTREACHED */
453			}
454
455			/* Now we try the default method: binary search in the sorted
456			array of messages. */
457			bottom = 0;
458			top = domain->nstrings;
459	twoaday	328	while (bottom < top) {
460	twoaday	273	int cmp_val;
461
462			act = (bottom + top) / 2;
463	twoaday	328	cmp_val = strcmp (msgid, domain->data + SWAPIT(domain->must_swap,
464			domain->orig_tab[act].offset));
465	twoaday	273	if (cmp_val < 0)
466			top = act;
467			else if (cmp_val > 0)
468			bottom = act + 1;
469	twoaday	328	else
470			return get_string (domain, act);
471	twoaday	273	}
472
473			not_found:
474			return msgid;
475			}
476
477
478			/* Map the user specific language ID to a gettext conform language string.
479			Example: LANG_GERMAN -> "de" */
480			const char*
481	twoaday	278	gettext_get_langid (void)
482	twoaday	273	{
483			LANGID lang;
484
485			lang = GetUserDefaultLangID ();
486			if (PRIMARYLANGID (lang) == LANG_ENGLISH)
487			return NULL;
488
489	twoaday	328	for (int i=0; lang_list[i].id; i++) {
490	twoaday	273	if (PRIMARYLANGID (lang) == lang_list[i].langid)
491			return lang_list[i].id;
492			}
493			return NULL;
494			}
495
496
497			/* Take a table with control item IDs and their translation
498			and set each text to the translated value. */
499			void
500			gettext_localize_dialog (HWND dlg, struct gettext_tab_s *tab,
501			const char *title)
502			{
503	twoaday	328	for (int i=0; tab[i].trans != NULL; i++)
504	twoaday	273	SetDlgItemText (dlg, tab[i].ctlid, tab[i].trans);
505	twoaday	328	if (title != NULL)
506	twoaday	273	SetWindowText (dlg, title);
507			}