mirror of
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185 lines
4.3 KiB
C++
185 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "java_io_FileInputStream.h"
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#include "java_io_FileDescriptor.h"
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#include "prio.h"
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#include "prprf.h"
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#include "Mapping.h"
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#include "ErrorHandling.h"
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#include "JavaString.h"
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#include "SysCallsRuntime.h"
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extern Mapping fdMapping;
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extern "C" {
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inline PRFileDesc *java_io_FileInputStream_GetDesc(Java_java_io_FileInputStream *str)
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{
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PRFileDesc *desc = fdMapping.get(str->fd->fd);
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if (!desc)
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sysThrowNamedException("java/io/IOException");
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return desc;
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}
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inline int64 java_io_FileInputStream_Read(Java_java_io_FileInputStream *str,
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char *buf, int32 len)
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{
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PRFileDesc *desc = java_io_FileInputStream_GetDesc(str);
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int nRead = PR_Read(desc, buf, len);
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if (nRead == 0)
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return -1; /* EOF */
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else if (nRead < 0)
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sysThrowNamedException("java/io/IOException");
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return nRead;
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}
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/*
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* Class : java/io/FileInputStream
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* Method : open
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* Signature : (Ljava/lang/String;)V
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*/
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NS_EXPORT NS_NATIVECALL(void)
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Netscape_Java_java_io_FileInputStream_open(Java_java_io_FileInputStream *stream,
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Java_java_lang_String *str)
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{
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char *name = ((JavaString *) str)->convertUtf();
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PRFileDesc *desc = PR_Open(name, PR_RDONLY, 0);
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JavaString::freeUtf(name);
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if (!desc)
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sysThrowNamedException("java/io/IOException");
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Int32 fd = fdMapping.add(desc);
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stream->fd->fd = fd;
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}
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/*
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* Class : java/io/FileInputStream
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* Method : read
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* Signature : ()I
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*/
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NS_EXPORT NS_NATIVECALL(int32)
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Netscape_Java_java_io_FileInputStream_read(Java_java_io_FileInputStream *str)
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{
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char c;
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Int32 nRead = (int32) java_io_FileInputStream_Read(str, &c, 1);
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assert(nRead == 1);
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return (Int32) c;
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}
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/*
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* Class : java/io/FileInputStream
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* Method : readBytes
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* Signature : ([BII)I
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*/
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NS_EXPORT NS_NATIVECALL(int32)
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Netscape_Java_java_io_FileInputStream_readBytes(Java_java_io_FileInputStream *str,
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ArrayOf_uint8 *arr,
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int32 offset,
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int32 len)
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{
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if (offset < 0 || offset >= len || (Uint32)len > (arr->length - offset))
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runtimeError(RuntimeError::illegalAccess);
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char *startp = (char *) arr->elements + offset;
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int32 nRead = (int32) java_io_FileInputStream_Read(str, startp, len);
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return nRead;
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}
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/*
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* Class : java/io/FileInputStream
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* Method : skip
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* Signature : (J)J
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*/
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NS_EXPORT NS_NATIVECALL(int64)
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Netscape_Java_java_io_FileInputStream_skip(Java_java_io_FileInputStream *str,
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int64 nBytesToSkip)
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{
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if (nBytesToSkip < 0)
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sysThrowNamedException("java/io/IOException");
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else if (nBytesToSkip == 0)
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return 0;
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char *buf = new char[(int32) nBytesToSkip];
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if (!buf)
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return 0;
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int32 nRead = (int32) java_io_FileInputStream_Read(str, buf, (int32) nBytesToSkip);
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return nRead;
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}
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/*
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* Class : java/io/FileInputStream
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* Method : available
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* Signature : ()I
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*/
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NS_EXPORT NS_NATIVECALL(int32)
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Netscape_Java_java_io_FileInputStream_available(Java_java_io_FileInputStream *str)
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{
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PRFileDesc *desc = java_io_FileInputStream_GetDesc(str);
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return PR_Available(desc);
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}
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/*
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* Class : java/io/FileInputStream
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* Method : close
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* Signature : ()V
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*/
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NS_EXPORT NS_NATIVECALL(void)
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Netscape_Java_java_io_FileInputStream_close(Java_java_io_FileInputStream *str)
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{
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fdMapping.close(str->fd->fd);
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}
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/*
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* Class : java/io/FileInputStream
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* Method : initIDs
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* Signature : ()V
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*/
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NS_EXPORT NS_NATIVECALL(void)
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Netscape_Java_java_io_FileInputStream_initIDs()
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{
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/* Currently empty, since all our initialization is done statically (see Mapping.h) */
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}
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} /* extern "C" */
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