root/core/StringBuffer.cpp

DEFINITIONS

1. write

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
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 * the Initial Developer. All Rights Reserved.
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 *   Adobe AS3 Team
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#include "avmplus.h"

namespace avmplus
{
        using namespace MMgc;

        StringOutputStream::StringOutputStream(GC *gc)
        {
                GCAssert(!gc->IsPointerToGCPage(this));
                m_buffer = (char*) gc->Alloc(kInitialCapacity);
                m_buffer[0] = 0;
                m_length = 0;
        }

        StringOutputStream::~StringOutputStream()
        {
                if (m_buffer) {
                        GC* gc = MMgc::GC::GetGC(m_buffer);
                        gc->Free(m_buffer);
                }
        }

        int StringOutputStream::write(const void *buffer,
                                                                  int count)
        {
                if (m_length + count >= (int)GC::Size(m_buffer))
                {
                        GC* gc = MMgc::GC::GetGC(m_buffer);
                        int newCapacity = (m_length+count+1)*2;
                        char* newBuffer = (char*) gc->Alloc(newCapacity);
                        if (!newBuffer) {
                                return 0;
                        }
                        VMPI_memcpy(newBuffer, m_buffer, m_length);
                        gc->Free(m_buffer);
                        m_buffer = newBuffer;
                }
                VMPI_memcpy(m_buffer+m_length, buffer, count);
                m_length += count;
                m_buffer[m_length] = 0;
                return count;
        }
}