    /****************************************************************************/
    /*                                                                          */
    /*                 Copyright (c) Microsoft Corp.  1987, 1991                */
    /*                           All Rights Reserved                            */
    /*                                                                          */
    /****************************************************************************/
    /****************************** Module Header *******************************
    * Module Name: devinfo.c
    *
    * Contains routines for manipulating the linked list of known target
    * devices for icons and cursors.
    *
    * History:
    *
    ****************************************************************************/
    
    #include "imagedit.h"
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    
    
    STATICFN VOID ProcessDeviceSection(INT iType);
    STATICFN BOOL ParseDeviceLine(PSTR pszLine, PINT pnColors, PINT pcx,
        PINT pcy);
    
    
    
    /************************************************************************
    * InitDeviceList
    *
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID InitDeviceList(VOID)
    {
        /*
         * Allocate the standard icon devices.
         */
        DeviceLinkAlloc(FT_ICON, ids(IDS_ICONDEVNAMEEGAVGA), 16, 32, 32);
        DeviceLinkAlloc(FT_ICON, ids(IDS_ICONDEVNAMEMONO), 2, 32, 32);
        DeviceLinkAlloc(FT_ICON, ids(IDS_ICONDEVNAMECGA), 2, 32, 16);
    
        ProcessDeviceSection(FT_ICON);
    
        /*
         * Allocate the standard cursor devices.
         */
        DeviceLinkAlloc(FT_CURSOR, ids(IDS_CURDEVNAMEVGAMONO), 2, 32, 32);
        DeviceLinkAlloc(FT_CURSOR, ids(IDS_CURDEVNAMEVGACOLOR), 16, 32, 32);
    
        ProcessDeviceSection(FT_CURSOR);
    }
    
    
    
    /************************************************************************
    * ProcessDeviceSection
    *
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    STATICFN VOID ProcessDeviceSection(
        INT iType)
    {
        PSTR pszSectionName;
        CHAR szValueBuf[CCHTEXTMAX];
        CHAR szKeyNameBuf[CCHTEXTMAX];
        PSTR pszKeyName;
        INT nColors;
        INT cx;
        INT cy;
    
        if (iType == FT_ICON) {
            pszSectionName = ids(IDS_ICONINISECTION);
        }
        else {
            pszSectionName = ids(IDS_CURSORINISECTION);
        }
    
        if (!GetPrivateProfileString(pszSectionName, NULL, "",
                szKeyNameBuf, sizeof(szKeyNameBuf), ids(IDS_IMAGEDITINI)))
            return;
    
        pszKeyName = szKeyNameBuf;
        while (*pszKeyName) {
            if (GetPrivateProfileString(pszSectionName, pszKeyName, "",
                    szValueBuf, sizeof(szValueBuf), ids(IDS_IMAGEDITINI))) {
                if (ParseDeviceLine(szValueBuf, &nColors, &cx, &cy))
                    DeviceLinkAlloc(iType, pszKeyName, nColors, cx, cy);
            }
    
            pszKeyName += strlen(pszKeyName) + 1;
        }
    }
    
    
    
    /************************************************************************
    * ParseDeviceLine
    *
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    STATICFN BOOL ParseDeviceLine(
        PSTR pszLine,
        PINT pnColors,
        PINT pcx,
        PINT pcy)
    {
        static CHAR szSep[] = " ,";
        PSTR pstr;
    
        if (!(pstr = strtok(pszLine, szSep)))
            return FALSE;
    
        *pnColors = atoi(pstr);
    
        if (!(pstr = strtok(NULL, szSep)))
            return FALSE;
    
        *pcx = atoi(pstr);
    
        if (!(pstr = strtok(NULL, szSep)))
            return FALSE;
    
        *pcy = atoi(pstr);
    
        return TRUE;
    }
    
    
    
    /************************************************************************
    * DeviceLinkAlloc
    *
    * Allocates a DEVICE structure, initializes it with the given values
    * and adds it to the appropriate linked list.  Because these are
    * specified only at init time, there is no need to ever free them.
    *
    * There is a special case if the image type is FT_BITMAP.  Because
    * there is only one type of bitmap image device at any one time,
    * this routine does not really allocate a link for these.  Instead,
    * it uses a static structure for bitmaps.  It will be set to the
    * given values and a pointer to it will be returned.  This means
    * that for bitmaps, this function must be called every time that
    * the current bitmap image changes to set up the proper values in
    * the structure.
    *
    * Arguments:
    *   INT iType    - Type of image.  FT_* constant.
    *   PSTR pszName - Device name ("VGA", for example).
    *   INT nColors  - Number of colors.
    *   INT cx       - Width of image.
    *   INT cy       - Height of image.
    *
    * History:
    *
    ************************************************************************/
    
    PDEVICE DeviceLinkAlloc(
        INT iType,
        PSTR pszName,
        INT nColors,
        INT cx,
        INT cy)
    {
        static DEVICE DeviceBitmap;     // Device structure for bitmaps.
        PDEVICE pDevice;
        PDEVICE pDeviceT;
        PDEVICE *ppDeviceHead;
    
        /*
         * Currently we only support 1 and 4 plane devices.
         */
        if (nColors != 2 && nColors != 16) {
            Message(MSG_BADDEVICECOLORS);
            return NULL;
        }
    
        /*
         * There is a limit to the size of image we will edit.  For icons
         * and cursors, the field that carries the dimensions is a byte,
         * so the size cannot be greater than 256.  This is also what
         * we limit bitmaps to.
         */
        if (cx < 1 || cx > MAXIMAGEDIM || cy < 1 || cy > MAXIMAGEDIM) {
            Message(MSG_BADDEVICESIZE, MAXIMAGEDIM);
            return NULL;
        }
    
        /*
         * For bitmaps, don't really allocate a link, just reuse the
         * static DEVICE structure used for bitmaps.
         */
        if (iType == FT_BITMAP) {
            pDevice = &DeviceBitmap;
        }
        else {
            if (!(pDevice = (PDEVICE)MyAlloc(sizeof(DEVICE))))
                return NULL;
    
            switch (iType) {
                case FT_ICON:
                    ppDeviceHead = &gpIconDeviceHead;
                    gnIconDevices++;
                    break;
    
                case FT_CURSOR:
                    ppDeviceHead = &gpCursorDeviceHead;
                    gnCursorDevices++;
                    break;
            }
        }
    
        pDevice->pDeviceNext = NULL;
        pDevice->iType = iType;
        pDevice->nColors = nColors;
        pDevice->cx = cx;
        pDevice->cy = cy;
    
        if (pszName) {
            strcpy(pDevice->szName, pszName);
            wsprintf(pDevice->szDesc, "%s %d-Color %dx%d",  //   hardcoded strings!
                    (LPSTR)pszName, nColors, cx, cy);
        }
        else {
            *pDevice->szName = '\0';
            wsprintf(pDevice->szDesc, "%d-Color %dx%d", nColors, cx, cy);
        }
    
        /*
         * Because there is only one bitmap link, there is no need
         * for a list for these, only icons and cursors.
         */
        if (iType != FT_BITMAP) {
            /*
             * Insert the link in the specified list.
             */
            if (!(*ppDeviceHead)) {
                /*
                 * This is the first one.  Start the list.
                 */
                *ppDeviceHead = pDevice;
            }
            else {
                /*
                 * Find the end of the list and tack on the new link.
                 */
                for (pDeviceT = *ppDeviceHead; pDeviceT->pDeviceNext;
                        pDeviceT = pDeviceT->pDeviceNext)
                    ;
    
                pDeviceT->pDeviceNext = pDevice;
            }
        }
    
        return pDevice;
    }
    
    
    
    /************************************************************************
    * DeviceLinkFind
    *
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    PDEVICE DeviceLinkFind(
        PDEVICE pDeviceHead,
        INT nColors,
        INT cx,
        INT cy)
    {
        PDEVICE pDevice;
    
        /*
         * Search the specified list.
         */
        for (pDevice = pDeviceHead; pDevice; pDevice = pDevice->pDeviceNext) {
            /*
             * Is this a match?
             */
            if (pDevice->nColors == nColors && pDevice->cx == cx &&
                    pDevice->cy == cy)
                break;
        }
    
        return pDevice;
    }
    
    
    
    /************************************************************************
    * DeviceLinkUsed
    *
    * This function returns TRUE if the specified device is used in
    * the current image list.
    *
    * Arguments:
    *   PDEVICE pDevice - Device to look for.
    *
    * History:
    *
    ************************************************************************/
    
    BOOL DeviceLinkUsed(
        PDEVICE pDevice)
    {
        PIMAGEINFO pImage;
    
        for (pImage = gpImageHead; pImage; pImage = pImage->pImageNext) {
            if (pImage->pDevice == pDevice)
                return TRUE;
        }
    
        return FALSE;
    }
