root/axscript/FileClass.cpp

DEFINITIONS

1. BEGIN_NATIVE_MAP
2. exists
3. read
4. write

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2004-2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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// a clone from the shell

#include "axtam.h"
#include "FileClass.h"

#include <stdlib.h>

namespace avmshell
{
        BEGIN_NATIVE_MAP(FileClass)
                NATIVE_METHOD(avmplus_File_exists, FileClass::exists)
                NATIVE_METHOD(avmplus_File_read, FileClass::read)
                NATIVE_METHOD(avmplus_File_write, FileClass::write)
        END_NATIVE_MAP()
                                          
        FileClass::FileClass(VTable *cvtable)
                : ClassClosure(cvtable)
    {
                createVanillaPrototype();
        }

        bool FileClass::exists(Stringp filename)
        {
                if (!filename) {
                        toplevel()->throwArgumentError(kNullArgumentError, "filename");
                }
                UTF8String* filenameUTF8 = filename->toUTF8String();
                FILE *fp = fopen(filenameUTF8->c_str(), "r");
                if (fp != NULL) {
                        fclose(fp);
                        return true;
                }
                return false;
        }

        Stringp FileClass::read(Stringp filename)
        {
                Toplevel* toplevel = this->toplevel();
                AvmCore* core = this->core();

                if (!filename) {
                        toplevel->throwArgumentError(kNullArgumentError, "filename");
                }
                UTF8String* filenameUTF8 = filename->toUTF8String();
                FILE *fp = fopen(filenameUTF8->c_str(), "r");
                if (fp == NULL) {
                        toplevel->throwError(kFileOpenError, filename);
                }
                fseek(fp, 0L, SEEK_END);
                long len = ftell(fp);
                rewind(fp);

                unsigned char *c = new unsigned char[len+1];
                len = fread(c, 1, len, fp);
                c[len] = 0;
                
                fclose(fp);

                if (len >= 3)
                {
                        // UTF8 BOM
                        if ((c[0] == 0xef) && (c[1] == 0xbb) && (c[2] == 0xbf))
                        {
                                return core->newString(((char *)c) + 3, len - 3);
                        }
                        else if ((c[0] == 0xfe) && (c[1] == 0xff))
                        {
                                //UTF-16 big endian
                                c += 2;
                                len = (len - 2) >> 1;
                                Stringp out = new (core->GetGC()) String(len);
                                wchar *buffer = out->lockBuffer();
                                for (long i = 0; i < len; i++)
                                {
                                        buffer[i] = (c[0] << 8) + c[1];
                                        c += 2;
                                }
                                out->unlockBuffer();

                                return out;
                        }
                        else if ((c[0] == 0xff) && (c[1] == 0xfe))
                        {
                                //UTF-16 little endian
                                c += 2;
                                len = (len - 2) >> 1;
                                Stringp out = new (core->GetGC()) String(len);
                                wchar *buffer = out->lockBuffer();
                                for (long i = 0; i < len; i++)
                                {
                                        buffer[i] = (c[1] << 8) + c[0];
                                        c += 2;
                                }
                                out->unlockBuffer();
                                return out;
                        }
                }

                Stringp out = core->newString((char *) c);
                delete [] c;
                
                return out;
        }

        void FileClass::write(Stringp filename,
                                                  Stringp data)
        {
                Toplevel* toplevel = this->toplevel();

                if (!filename) {
                        toplevel->throwArgumentError(kNullArgumentError, "filename");
                }
                if (!data) {
                        toplevel->throwArgumentError(kNullArgumentError, "data");
                }
                UTF8String* filenameUTF8 = filename->toUTF8String();
                FILE *fp = fopen(filenameUTF8->c_str(), "w");
                if (fp == NULL) {
                        toplevel->throwError(kFileWriteError, filename);
                }
                UTF8String* dataUTF8 = data->toUTF8String();
                fwrite(dataUTF8->c_str(), dataUTF8->length(), 1, fp);
                fclose(fp);
        }
}