settings.c

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//
//  settings.c
//
//  Load/Save settings from registry
//
#include <stdlib.h>
#include <windows.h>
#include <tchar.h>
#include "globals.h"
#include "message.h"
#include "matrix.h"
 
TCHAR   g_szMessages[MAX_MESSAGES][MAXMSG_LENGTH];
int     g_nNumMessages       = 0;
int     g_nMessageSpeed      = 5;
TCHAR   g_szFontName[512]    = _T("Arial");
 
int     g_nMatrixSpeed       = 10;
int     g_nDensity           = 32;
int     g_nFontSize          = 12;
BOOL    g_fRandomizeMessages = FALSE;
BOOL    g_fFontBold          = TRUE;
BOOL    g_fScreenSaving      = FALSE;
 
HFONT   g_hFont;
 
void LoadSettings()
{
    HKEY hkey;
    LONG value;
    ULONG len;
    TCHAR *hugechar = malloc(4096);
    TCHAR *hptr = hugechar;
 
    if(hugechar == 0)
        return;
 
    ZeroMemory(hugechar, 4096);
 
    RegCreateKeyEx(HKEY_CURRENT_USER, _T("Software\\Catch22\\Matrix Screen Saver"), 0,
        _T(""), 0, KEY_READ, NULL, &hkey, NULL);
 
    len = sizeof value;
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("MessageSpeed"), 0, 0, (BYTE *)&value, &len))
    {
        if(value >= MSGSPEED_MIN && value <= MSGSPEED_MAX)
            g_nMessageSpeed = value;
    }
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("MatrixSpeed"),  0, 0, (BYTE *)&value, &len))
    {
        if(value >= SPEED_MIN && value <= SPEED_MAX)
            g_nMatrixSpeed  = value;
    }
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("Density"),      0, 0, (BYTE *)&value, &len))
    {
        if(value >= DENSITY_MIN && value <= DENSITY_MAX)
            g_nDensity      = value;
    }
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("FontSize"),      0, 0, (BYTE *)&value, &len))
    {
        if(value >= FONT_MIN && value <= FONT_MAX)
            g_nFontSize  = value;
    }
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("FontBold"),      0, 0, (BYTE *)&value, &len))
        g_fFontBold = (value == 0 ? FALSE : TRUE);
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("Randomize"),      0, 0, (BYTE *)&value, &len))
        g_fRandomizeMessages = (value == 0 ? FALSE : TRUE);
 
    len = 512;
    if(RegQueryValueEx(hkey, _T("FontName"),  0, 0, (BYTE *)g_szFontName, &len) != ERROR_SUCCESS)
        lstrcpy(g_szFontName, _T("Arial"));
 
    len = 4096;
 
    if(ERROR_SUCCESS == RegQueryValueEx(hkey, _T("Messages"),      0, 0 , (BYTE *)hugechar, &len))
    {
        while(len > 0 && *hptr && _istascii(*hptr))
        {
            if(lstrlen(hptr) > 0)
            {
                lstrcpyn(g_szMessages[g_nNumMessages], hptr, MAXMSG_LENGTH);
                ++g_nNumMessages;
                hptr += lstrlen(hptr) + 1;
            }
        }
    }
    else
    {
        /* built-in coded message for first run */
        lstrcpyn(g_szMessages[0], _T("ReactOS"), MAXMSG_LENGTH);
        ++g_nNumMessages;
    }
 
    RegCloseKey(hkey);
    free(hugechar);
}
 
void SaveSettings()
{
    HKEY hkey;
    TCHAR *hugechar = malloc(4096 * sizeof(TCHAR));
    TCHAR *msgptr = hugechar;
    int totallen = 0;
    int i,len;
    LONG value;
 
    if(hugechar == 0)
        return;
 
    ZeroMemory(hugechar, 4096 * sizeof(TCHAR));
    msgptr = hugechar;
 
    RegCreateKeyEx(HKEY_CURRENT_USER, _T("Software\\Catch22\\Matrix Screen Saver"), 0,
        _T(""), 0, KEY_WRITE, NULL, &hkey, NULL);
 
    value = g_nMessageSpeed;
    RegSetValueEx(hkey, _T("MessageSpeed"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    value = g_nMatrixSpeed;
    RegSetValueEx(hkey, _T("MatrixSpeed"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    value = g_nDensity;
    RegSetValueEx(hkey, _T("Density"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    value = g_nFontSize;
    RegSetValueEx(hkey, _T("FontSize"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    value = g_fRandomizeMessages;
    RegSetValueEx(hkey, _T("Randomize"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    value = g_fFontBold;
    RegSetValueEx(hkey, _T("FontBold"), 0, REG_DWORD, (BYTE *)&value, sizeof value);
 
    RegSetValueEx(hkey, _T("FontName"), 0, REG_SZ, (BYTE *)g_szFontName, lstrlen(g_szFontName) * sizeof(TCHAR));
 
    for(i = 0; i < g_nNumMessages; i++)
    {
        len = lstrlen(g_szMessages[i]);
 
        if(len > 0 && totallen+len < 4096)
        {
            lstrcpyn(msgptr, g_szMessages[i], 4096-totallen);
            totallen += len + 1;
            msgptr += len + 1;
        }
    }
 
    //*msgptr = _T('\0');
    totallen++;
 
    RegSetValueEx(hkey, _T("Messages"), 0, REG_MULTI_SZ, (BYTE *)hugechar, totallen * sizeof(TCHAR));
    RegCloseKey(hkey);
 
    free(hugechar);
}