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Microsoft Windows NT Build 328 10-12-1992

#include "PortTool.h"

// global search string
char	lpszSearch[MAXSEARCHSTRING+1] = "";
HWND	hDlgSearch;

FINDREPLACE    frSearch;


// compare two substrings
BOOL WINAPI RealSlowCompare (WORD, char *, char *);
BOOL WINAPI RealSlowCompare (
    WORD    wCase,
    char    *lpszSubject,
    char    *lpszTarget)
{
    if (wCase)
	{
	while (*lpszTarget)
	    if (*lpszTarget++ != *lpszSubject++)
		return FALSE;
	}
    else
	{
	// convert to lower case before comparing
	CharLower ((char *)lpszTarget);
	while (*lpszTarget)
	    if (*lpszTarget++ != (CHAR)(DWORD)CharLower ((char *)(DWORD)(BYTE)*lpszSubject++))
		return FALSE;
	}
    return TRUE;
}




// invoke the common search/replace dialog
BOOL WINAPI FindDialog (
    HWND    hWnd,
    WORD    wCase,
    WORD    wDir,
    char    *lpszInit)
{
    frSearch.lStructSize      = sizeof (FINDREPLACE);
    frSearch.hwndOwner	      = hWnd;
    frSearch.hInstance	      = (HANDLE)GetWindowLong (hWnd, GWL_HINSTANCE);
    frSearch.Flags	      = 0;

    // if wCase, case sensitive
    if (wCase)
	frSearch.Flags	      |= FR_MATCHCASE;
    // if wDir, search forward
    if (wDir)
	frSearch.Flags	      |= FR_DOWN;

    frSearch.lpstrFindWhat    = lpszInit;
    frSearch.lpstrReplaceWith = NULL;
    frSearch.wFindWhatLen     = MAXSEARCHSTRING+1;
    frSearch.wReplaceWithLen  = 0;
    frSearch.lCustData	      = NULL;
    frSearch.lpfnHook	      = NULL;
    frSearch.lpTemplateName   = NULL;

    // call common search dialog
    if (hDlgSearch = FindText (&frSearch))
	return TRUE;
    else
	return FALSE;
}



// perform the actual text searching in the edit control data
BOOL WINAPI LocateText (
    HWND	hWnd,
    WORD	wCase,
    WORD	wDir,
    char	*lpszStr)
{
    UINT    uBegSel, uEndSel, uOrgBegSel, uOrgEndSel;
    HANDLE  hEditData;
    HWND    hWndEdit = (HANDLE)GetWindowLong (hWnd, WL_HWNDEDIT);
    char    *lpEditData;
    UINT    uLen;
    int     nStrLen = strlen (lpszStr);
    int     nChars;

    // test for valid string
    if (!*lpszStr)
	return FALSE;

    // locate beginning of selected text
    SendMessage (hWndEdit, EM_GETSEL, (UINT)&uBegSel, (UINT)&uEndSel);
    uOrgBegSel = uBegSel;
    uOrgEndSel = uEndSel;

    // get length of the text
    uLen = (UINT)SendMessage (hWndEdit, WM_GETTEXTLENGTH, 0, 0);

    // Get handle to edit text data and lock it
    hEditData = (HANDLE)SendMessage (hWndEdit, EM_GETHANDLE, 0, 0);
    lpEditData = LocalLock (hEditData);

    // advance starting point past selection one char
    lpEditData += (wDir ? ++uBegSel : --uBegSel);

    // count characters to search (either forward to end of file or back to beginning)
    if (wDir)
	nChars = (int)(uLen - uBegSel + 1 - nStrLen);
    else
	nChars = (int)uBegSel;

    // compare character by character for a substring match
    while (nChars >= nStrLen)
	{
	// compare this substring for a match
	if (RealSlowCompare (wCase, lpEditData, lpszStr))
	    {
	    // string found, cleanup and go away
	    LocalUnlock(hEditData);

	    // scroll parent edit control and select offending text
	    SendMessage (hWndEdit, EM_LINESCROLL, 0,
		SendMessage (hWndEdit, EM_LINEFROMCHAR, uBegSel, 0) -
		SendMessage (hWndEdit, EM_GETFIRSTVISIBLELINE, 0, 0));

	    // Select the located string
	    uEndSel = uBegSel + nStrLen;
	    SendMessage(hWndEdit, EM_SETSEL, uBegSel, uEndSel);

	    // return success
	    return TRUE;
	    }

	nChars--;

	// increment/decrement start position by 1
	lpEditData += (wDir ? 1 : -1);
	wDir ? uBegSel++ : uBegSel--;
	}

    LocalUnlock (hEditData);
    SendMessage (hWndEdit, EM_SETSEL, uOrgBegSel, uOrgEndSel);

    // return failed search
    return FALSE;
}

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