ciderpress/util/Util.h

/*
 * CiderPress
 * Copyright (C) 2007 by faddenSoft, LLC.  All Rights Reserved.
 * See the file LICENSE for distribution terms.
 */
/*
 * Miscellaneous utility classes.
 */
#ifndef UTIL_UTIL_H
#define UTIL_UTIL_H

/*
 * Gripper for a resizable window.
 */
class CGripper: public CScrollBar {
protected:
    afx_msg LRESULT OnNcHitTest(CPoint point);

    DECLARE_MESSAGE_MAP()
};


/*
 * Transfer a buffer of data into a rich edit control.
 */
class RichEditXfer {
public:
    RichEditXfer(const void* buf, long len) : fBuf((char*)buf), fLen(len)
        {}

    static DWORD CALLBACK EditStreamCallback(DWORD dwCookie, LPBYTE pbBuff,
            LONG cb, LONG* pcb);

    const char* fBuf;
    long        fLen;
};


/*
 * Buffer that expands as data is added to it with stdio-style calls.
 */
class ExpandBuffer {
public:
    ExpandBuffer(long initialSize = 65536) {
        ASSERT(initialSize > 0);
        fInitialSize = initialSize;
        fWorkBuf = nil;
        fWorkCount = fWorkMax = 0;
    }
    virtual ~ExpandBuffer(void) {
        if (fWorkBuf != nil) {
            WMSG0("ExpandBuffer: fWorkBuf not seized; freeing\n");
            delete[] fWorkBuf;
        }
    }
    virtual int CreateWorkBuf(void);

    void Reset(void) {
        delete[] fWorkBuf;
        fWorkBuf = nil;
        fWorkCount = fWorkMax = 0;
    }

    // Copy printf-formatted output into the output buffer.
    void Printf(const char* format, ...);

    // Write binary data to the buffer.
    void Write(const unsigned char* buf, long len);

    // Put a single character in.
    void Putc(char ch);

    // Seize control of the buffer.  It will be the caller's duty to call
    // delete[] to free it.
    virtual void SeizeBuffer(char** ppBuf, long* pLen);
    
protected:
    virtual int GrowWorkBuf(void);

    enum {
        kWorkBufMaxIncrement    = 4*1024*1024,      // limit increase to 4MB jumps
    };

    long        fInitialSize;   // initial size of the work buffer
    char*       fWorkBuf;       // work in progress
    long        fWorkCount;     // quantity of data in buffer
    long        fWorkMax;       // maximum size of buffer
};


/*
 * Windows helpers.
 */
void EnableControl(CDialog* pDlg, int id, bool enable=true);
void MoveControl(CDialog* pDlg, int id, int deltaX, int deltaY,
    bool redraw = true);
void StretchControl(CDialog* pDlg, int id, int deltaX, int deltaY,
    bool redraw = true);
void MoveStretchControl(CDialog* pDlg, int id, int moveX, int moveY,
    int stretchX, int stretchY, bool redraw = true);
HDWP MoveControl(HDWP hdwp, CDialog* pDlg, int id, int deltaX, int deltaY,
    bool redraw = true);
HDWP StretchControl(HDWP hdwp, CDialog* pDlg, int id, int deltaX, int deltaY,
    bool redraw = true);
HDWP MoveStretchControl(HDWP hdwp, CDialog* pDlg, int id, int moveX, int moveY,
    int stretchX, int stretchY, bool redraw = true);
int GetDlgButtonCheck(CWnd* pWnd, int id);
void SetDlgButtonCheck(CWnd* pWnd, int id, int checkVal);
void CreateSimpleFont(CFont* pFont, CWnd* pWnd, const WCHAR* typeFace,
        int pointSize);
void GetWin32ErrorString(DWORD err, CString* pStr);
void ShowFailureMsg(CWnd* pWnd, const CString& msg, int titleStrID);
BOOL ShowContextHelp(CWnd* pWnd, HELPINFO* lpHelpInfo);
bool IsWin9x(void);

/*
 * Miscellaneous functions.
 */
int GetPascalString(const char* buf, long maxLen, CString* pStr);
void LogHexDump(const void* buf, long len);
int ComputePercent(LONGLONG part, LONGLONG full);
void FormatDate(time_t when, CString* pStr);
const WCHAR* Stristr(const WCHAR* string1, const WCHAR* string2);
void VectorizeString(WCHAR* mangle, WCHAR** argv, int* pArgc);
void InjectLowercase(CString* pStr);
bool MatchSemicolonList(const CString set, const CString match);
char* StrcpyNew(const char* str);

/* time_t values for bad dates */
#define kDateNone       ((time_t) -2)
#define kDateInvalid    ((time_t) -1)       // should match return from mktime()

#endif /*UTIL_UTIL_H*/