windows-nt-4.0/private/sdktools/gutils/gfile.c

   /*
    * File Open/Create dialogs
    *
    */

/*
 * these dialog functions exist because they were written and
 * used before the commmon dialogs existed.
 *
 * they have now been reduced to just calls to the common file dialog
 * functions
 */



/*---includes-----------------------------------------------------------*/
#include "windows.h"
#include "commdlg.h"
#include "gutilsrc.h"
#include "gutils.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>



/*--functions----------------------------------------------------------*/

/*
 * gfile_open
 *     	dialog asking the user to select an existing file to open.
 *
 * parameters
 *
 *	prompt - message to user indicating purpose of file
 *		 (to be displayed somewhere in dialog box.
 *
 *	ext    - default file extension if user enters file without
 *		 extension.
 *
 *	spec   - default file spec (eg *.*)
 *
 *	osp    - OFSTRUCT representing file, if successfully open.
 *
 *	fn     - buffer where filename (just final element) is returned.
 *
 * returns - true if file selected and exists (tested with OF_EXIST).
 *	     FALSE if dialog cancelled. If user selects a file that we cannot
 *	     open, we complain and restart the dialog.
 *
 *	     if TRUE is returned, the file will have been successfully opened,
 *	     for reading and then closed again.
 */

BOOL FAR PASCAL
gfile_open(LPSTR prompt, LPSTR ext, LPSTR spec, OFSTRUCT FAR *osp, LPSTR fn)
{
    OPENFILENAME ofn;
    char achFilters[MAX_PATH];
    char achPath[MAX_PATH];
    LPSTR chp;
    int fh;

    /* build filter-pair buffer to contain one pair - the spec filter,
     * twice (one of the pair should be the filter, the second should be
     * the title of the filter - we don't have a title so we use the
     * filter both times. remember double null at end of list of strings.
     */
    lstrcpy(achFilters, spec);		   // filter + null
    chp = &achFilters[lstrlen(achFilters)+1];	   //2nd string just after null
    lstrcpy(chp, spec);			   // filter name (+null)
    chp[lstrlen(chp)+1] = '\0'; 	   // double null at end of list

    /*
     * initialise arguments to dialog proc
     */
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = NULL;
    ofn.hInstance = NULL;
    ofn.lpstrFilter = achFilters;
    ofn.lpstrCustomFilter = NULL;
    ofn.nMaxCustFilter = 0;
    ofn.nFilterIndex = 1;		// first filter pair in list
    achPath[0] = '\0';
    ofn.lpstrFile = achPath;	   	// we need to get the full path to open
    ofn.nMaxFile = sizeof(achPath);
    ofn.lpstrFileTitle = fn;		// return final elem of name here
    ofn.nMaxFileTitle = 13;		// assume just big enough for 8.3+null
    ofn.lpstrInitialDir = NULL;
    ofn.lpstrTitle = prompt;		// dialog title is good place for prompt text
    ofn.Flags = OFN_FILEMUSTEXIST |
	    	OFN_HIDEREADONLY |
		OFN_PATHMUSTEXIST;
    ofn.lpstrDefExt = ext;

    /*
     * loop until the user cancels, or selects a file that we can open
     */
    do {
	if (!GetOpenFileName(&ofn)) {
	    return(FALSE);
	}

	fh = OpenFile(achPath, osp, OF_READ);
	
	if (fh == HFILE_ERROR) {
	    if (MessageBox(NULL, "File Could Not Be Opened", "File Open",
			    MB_OKCANCEL|MB_ICONSTOP) == IDCANCEL) {
    		return(FALSE);
	    }
	}
    } while (fh == HFILE_ERROR);

    _lclose(fh);

    return(TRUE);
}





/*
 * gfile_new
 *     	dialog asking the user to name a file for writing to.
 *
 * parameters
 *
 *	prompt - message to user indicating purpose of file
 *		 (to be displayed somewhere in dialog box.
 *
 *	ext    - default file extension if user enters file without
 *		 extension.
 *
 *	spec   - default file spec (eg *.*)
 *
 *	osp    - OFSTRUCT representing file, if successfully created.
 *
 *	fn     - buffer where filename (just final element) is returned.
 *
 * returns - true if file selected and exists (tested with OF_EXIST).
 *	     FALSE if dialog cancelled. If user selects a file that we cannot
 *	     open, we complain and restart the dialog.
 *
 *	     if TRUE is returned, the file will have been successfully
 *	     created and opened for writing and then closed again.
 */

BOOL FAR PASCAL
gfile_new(LPSTR prompt, LPSTR ext, LPSTR spec, OFSTRUCT FAR *osp, LPSTR fn)
{
    OPENFILENAME ofn;
    char achFilters[MAX_PATH];
    LPSTR chp;
    char achPath[MAX_PATH];
    int fh;

    /* build filter-pair buffer to contain one pair - the spec filter,
     * twice (one of the pair should be the filter, the second should be
     * the title of the filter - we don't have a title so we use the
     * filter both times. remember double null at end of list of strings.
     */
    lstrcpy(achFilters, spec);		   // filter + null
    chp = &achFilters[lstrlen(achFilters)+1];	   //2nd string just after null
    lstrcpy(chp, spec);			   // filter name (+null)
    chp[lstrlen(chp)+1] = '\0'; 	   // double null at end of list

    /*
     * initialise arguments to dialog proc
     */
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = NULL;
    ofn.hInstance = NULL;
    ofn.lpstrFilter = achFilters;
    ofn.lpstrCustomFilter = NULL;
    ofn.nMaxCustFilter = 0;
    ofn.nFilterIndex = 1;		// first filter pair in list
    achPath[0] = '\0';
    ofn.lpstrFile = achPath;	   	// we need to get the full path to open
    ofn.nMaxFile = sizeof(achPath);
    ofn.lpstrFileTitle = fn;		// return final elem of name here
    ofn.nMaxFileTitle = 13;		// assume just big enough for 8.3+null
    ofn.lpstrInitialDir = NULL;
    ofn.lpstrTitle = prompt;		// dialog title is good place for prompt text
    ofn.Flags = OFN_HIDEREADONLY;
    ofn.lpstrDefExt = ext;

    /*
     * loop until the user cancels, or selects a file that we can create/write
     */
    do {
	if (!GetSaveFileName(&ofn)) {
	    return(FALSE);
	}

	fh = OpenFile(achPath, osp, OF_CREATE|OF_READWRITE);
	
	if (fh == HFILE_ERROR) {
	    if (MessageBox(NULL, "File Could Not Be Created", "File Open",
			    MB_OKCANCEL|MB_ICONSTOP) == IDCANCEL) {
    		return(FALSE);
	    }
	}
    } while (fh == HFILE_ERROR);

    _lclose(fh);

    return(TRUE);
}