/* 
ITOUCH
Copyright 1997-2011 David Lindauer.

This program 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.

This program 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

You may contact the author at:
	mailto::camille@bluegrass.net
 */
#include <windows.h>

/*
 * This basically pulls one of the version strings out of the stringtable block
 * of the version resource.
 *
 * We are doing it out the long way for compatibility with wdosx
 */
static int strsize(short *str)
{
    int count = 0;
    while (*str++)
        count++;
    return count;
}

//-------------------------------------------------------------------------

int VersionString(char *buf, short *key, short *lang)
{
    int rv = 0;
    HMODULE handle = GetModuleHandle(0);
    HRSRC rsrc = FindResource(handle, (LPCTSTR)1, RT_VERSION);
    DWORD size = SizeofResource(handle, rsrc);
    HGLOBAL global = LoadResource(handle, rsrc);
    if (global)
    {
        char *s = LockResource(global);
        if (s)
        {
            if (!memcmp(s + 6, L "VS_VERSION_INFO", 32))
            {
                char *block = s + 0x5c;
                if (!memcmp(block + 6, L "StringFileInfo", 30))
                {
                    int xsize;
                    block = block + 0x24;
                    while (memcmp(block + 6, lang, strsize(lang) *2+2))
                    {
                        block = block + *(short*)block;
                        if (block >= s + size)
                            goto done;
                    }
                    xsize = *(short*)block - 0x24;
                    block = block + strsize(lang) *2+2+6;
                    while (xsize > 0 && memcmp(block + 6, key, strsize(key) *2))
                    {
                        int len = *(short*)block;
                        if (len % 4)
                            len += 2;
                        xsize -= len;
                        block = block + len;
                    }
                    if (xsize)
                    {
                        short *aa;
                        int len = *(short*)(block + 2);
                        int len1 = 6+strsize(key) *2+2;
                        if (len1 % 4)
                            len1 += 2;
                        aa = block + len1;
                        while (len--)
                        {
                            *buf++ =  *aa++;
                        }
                        *buf = 0;
                        rv = 1;

                    }
                }
            }
            done: 
        }
        FreeResource(global);
    }
    return rv;
}
