OutStr.h #1

/*******************************************************************************
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*******************************************************************************/

/*******************************************************************************
 * Name		: StrRef.h
 *
 * Author	: Duncan Barbee <dbarbee@perforce.com>
 *
 * Description	: A set of classes used to return strings.
 *
 ******************************************************************************/
#pragma once

class StrPtr;

/******************************************************************************
// StrRef is an abstract base class for any reference to text data that needs 
//   to be returned from the bridge. It provides a char* + length interface so 
//   that it can easily be returned in a preallocated buffer by first reading 
//   the length, allocating the buffer, then fetching string data.
******************************************************************************/

 class OutStr abstract: public p4base
{
public:
    OutStr(void) : p4base(Type()) {};
    virtual ~OutStr(void) {};

    virtual int Type(void) { return tOutStr; }

    void CopyToBuff( void * buff, int length);

    // Get the Text data and it's length
    virtual int IsUnicode() = 0;
    virtual const char * Text() = 0;
    virtual int Length() = 0;
};

/******************************************************************************
// StrPtrRef is wrap a StrPtr object, so  that it can easily be returned in a 
//   preallocated buffer by first reading the length, allocating the buffer, 
//   then fetching string data.
******************************************************************************/

class OutStrPtr : public OutStr
{
public:
    OutStrPtr(const StrPtr &pval, int isUni);
    virtual ~OutStrPtr(void);

    // Get the Text data and it's length
    virtual int IsUnicode() { return isUnicode; }
    virtual const char * Text();
    virtual int Length();

private:
    // Don't allow uninitialized references
    //StrPtrRef(void) {};

    int isUnicode;
    const StrPtr &value;
};

/******************************************************************************
// CharPtrRef is wrap a char *, so  that it can easily be returned in a 
//   preallocated buffer by first reading the length, allocating the buffer, 
//   then fetching string data.
******************************************************************************/
class OutCharPtr : public OutStr
{
public:
    OutCharPtr(char * pval);
    virtual ~OutCharPtr(void);

    // Get the Text data and it's length
    virtual int IsUnicode() { return 0; }
    virtual const char * Text();
    virtual int Length();

private:
    // Don't allow uninitialized references
    OutCharPtr(void) {};

    char * value;
    int length;
};

/******************************************************************************
// CharPtrRef is wrap a char *, so  that it can easily be returned in a 
//   preallocated buffer by first reading the length, allocating the buffer, 
//   then fetching string data.
******************************************************************************/
class OutWCharPtr : public OutStr
{
public:
    OutWCharPtr(WCHAR * pval);
    virtual ~OutWCharPtr(void);

    // Get the Text data and it's length
    virtual int IsUnicode() { return 1; }
    virtual const char * Text();
    virtual int Length();

private:
    // Don't allow uninitialized references
    OutWCharPtr(void) {};

    WCHAR * value;
    int length;
};