libjava/classpath/native/jni/java-io/javaio.c - rust-lang/gcc - Git at Google

 /* javaio.c - Common java.io native functions
    Copyright (C) 1998, 2002, 2004 Free Software Foundation, Inc.

 This file is part of GNU Classpath.

 GNU Classpath is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Classpath is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */

 /* do not move; needed here because of some macro definitions */
 #include <config.h>

 #include <stdio.h>
 #include <stdlib.h>

 #include <jni.h>
 #include <jcl.h>

 #include "target_native.h"
 #ifndef WITHOUT_FILESYSTEM
 #include "target_native_file.h"
 #endif
 #include "target_native_math_int.h"

 #include "javaio.h"

 /*
  * Function to open a file
  */

 jint
 _javaio_open_read (JNIEnv * env, jstring name)
 {
 #ifndef WITHOUT_FILESYSTEM
   const char *filename;
   int fd;
   int result;

   filename = JCL_jstring_to_cstring (env, name);
   if (filename == NULL)
     return (-1);

   TARGET_NATIVE_FILE_OPEN_READ (filename, fd, result);
   (*env)->ReleaseStringUTFChars (env, name, filename);
   if (result != TARGET_NATIVE_OK)
     {
       if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
 	JCL_ThrowException (env,
 			    "java/io/FileNotFoundException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());
       else
 	JCL_ThrowException (env,
 			    "java/io/IOException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());
     }

   JCL_free_cstring (env, name, filename);
   return (fd);
 #else /* not WITHOUT_FILESYSTEM */
   return (-1);
 #endif /* not WITHOUT_FILESYSTEM */
 }

 /*
  * Function to open a file for reading/writing
  */

 jint
 _javaio_open_readwrite (JNIEnv * env, jstring name)
 {
 #ifndef WITHOUT_FILESYSTEM
   const char *filename;
   int fd;
   int result;

   filename = JCL_jstring_to_cstring (env, name);
   if (filename == NULL)
     return (-1);

   TARGET_NATIVE_FILE_OPEN_READWRITE (filename, fd, result);
   (*env)->ReleaseStringUTFChars (env, name, filename);
   if (result != TARGET_NATIVE_OK)
     {
       if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
 	JCL_ThrowException (env,
 			    "java/io/FileNotFoundException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());
       else
 	JCL_ThrowException (env,
 			    "java/io/IOException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());
     }

   JCL_free_cstring (env, name, filename);
   return (fd);
 #else /* not WITHOUT_FILESYSTEM */
   return (-1);
 #endif /* not WITHOUT_FILESYSTEM */
 }

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

 /*
  * Function to close a file
  */

 void
 _javaio_close (JNIEnv * env, jint fd)
 {
 #ifndef WITHOUT_FILESYSTEM
   int result;

   if (fd != -1)
     {
       TARGET_NATIVE_FILE_CLOSE (fd, result);
       if (result != TARGET_NATIVE_OK)
 	JCL_ThrowException (env,
 			    "java/io/IOException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());
     }
 #else /* not WITHOUT_FILESYSTEM */
 #endif /* not WITHOUT_FILESYSTEM */
 }

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

 /*
  * Skips bytes in a file
  */

 jlong
 _javaio_skip_bytes (JNIEnv * env, jint fd, jlong num_bytes)
 {
 #ifndef WITHOUT_FILESYSTEM
   jlong current_offset, new_offset;
   int result;

   TARGET_NATIVE_FILE_SEEK_CURRENT (fd, TARGET_NATIVE_MATH_INT_INT64_CONST_0,
 				   current_offset, result);
   if (result != TARGET_NATIVE_OK)
     JCL_ThrowException (env,
 			"java/io/IOException",
 			TARGET_NATIVE_LAST_ERROR_STRING ());

   TARGET_NATIVE_FILE_SEEK_CURRENT (fd, num_bytes, new_offset, result);
   if (result != TARGET_NATIVE_OK)
     JCL_ThrowException (env,
 			"java/io/IOException",
 			TARGET_NATIVE_LAST_ERROR_STRING ());

   return (TARGET_NATIVE_MATH_INT_INT64_SUB (new_offset, current_offset));
 #else /* not WITHOUT_FILESYSTEM */
   return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
 #endif /* not WITHOUT_FILESYSTEM */
 }

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

 /*
  * Gets the size of the file
  */

 jlong
 _javaio_get_file_length (JNIEnv * env, jint fd)
 {
 #ifndef WITHOUT_FILESYSTEM
   jlong length;
   int result;

   TARGET_NATIVE_FILE_SIZE (fd, length, result);
   if (result != TARGET_NATIVE_OK)
     {
       JCL_ThrowException (env,
 			  "java/io/IOException",
 			  TARGET_NATIVE_LAST_ERROR_STRING ());
       return (TARGET_NATIVE_MATH_INT_INT64_CONST_MINUS_1);
     }

   return (length);
 #else /* not WITHOUT_FILESYSTEM */
   return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
 #endif /* not WITHOUT_FILESYSTEM */
 }

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

 /*
  * Reads data from a file
  */

 jint
 _javaio_read (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
 {
 #ifndef WITHOUT_FILESYSTEM
   jbyte *bufptr;
   int bytesRead;
   int result;

   assert (offset >= 0);
   assert (len >= 0);

   if (len == 0)
     return 0;			/* Nothing todo, and GetByteArrayElements() seems undefined. */

   bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
   if (bufptr == NULL)
     {
       JCL_ThrowException (env, "java/io/IOException",
 			  "Internal Error: get byte array fail");
       return (-1);
     }

   TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
   (*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
   if (result != TARGET_NATIVE_OK)
     JCL_ThrowException (env,
 			"java/io/IOException",
 			TARGET_NATIVE_LAST_ERROR_STRING ());

   if (bytesRead == 0)
     return (-1);

   return (bytesRead);
 #else /* not WITHOUT_FILESYSTEM */
   jbyte *bufptr;
   int bytesRead;

   assert (offset >= 0);
   assert (len >= 0);

   if ((fd == 0) || (fd == 1) || (fd == 2))
     {
       if (len == 0)
 	return 0;		/* Nothing todo, and GetByteArrayElements() seems undefined. */

       bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
       if (bufptr == NULL)
 	{
 	  JCL_ThrowException (env, "java/io/IOException",
 			      "Internal Error: get byte array");
 	  return (-1);
 	}

       TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
       (*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
       if (result != TARGET_NATIVE_OK)
 	JCL_ThrowException (env,
 			    "java/io/IOException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());

       if (bytesRead == 0)
 	return (-1);

       return (bytesRead);
     }
   else
     {
       return (-1);
     }
 #endif /* not WITHOUT_FILESYSTEM */
 }

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

 /*
  * Writes data to a file
  */

 jint
 _javaio_write (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
 {
 #ifndef WITHOUT_FILESYSTEM
   jbyte *bufptr;
   int bytes_written;
   int result;

   if (len == 0)
     return 0;			/* Nothing todo, and GetByteArrayElements() seems undefined. */

   bufptr = (*env)->GetByteArrayElements (env, buf, 0);
   if (bufptr == NULL)
     {
       JCL_ThrowException (env, "java/io/IOException",
 			  "Internal Error: get byte array");
       return (-1);
     }

   TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
 			    result);
   (*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
   if (result != TARGET_NATIVE_OK)
     JCL_ThrowException (env,
 			"java/io/IOException",
 			TARGET_NATIVE_LAST_ERROR_STRING ());

   if (bytes_written == 0)
     return (-1);

   return (bytes_written);
 #else /* not WITHOUT_FILESYSTEM */
   jbyte *bufptr;
   int bytesWritten;

   if ((fd == 0) || (fd == 1) || (fd == 2))
     {
       if (len == 0)
 	return 0;		/* Nothing todo, and GetByteArrayElements() seems undefined. */

       bufptr = (*env)->GetByteArrayElements (env, buf, 0);
       if (bufptr == NULL)
 	{
 	  JCL_ThrowException (env, "java/io/IOException", "Internal Error");
 	  return (-1);
 	}

       TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
 				result);
       (*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);

       if (bytes_written == -1)
 	JCL_ThrowException (env,
 			    "java/io/IOException",
 			    TARGET_NATIVE_LAST_ERROR_STRING ());

       if (bytes_written == 0)
 	return (-1);

       return (bytes_written);
     }
   else
     {
       return (-1);
     }
 #endif /* not WITHOUT_FILESYSTEM */
 }
	/* javaio.c - Common java.io native functions
	Copyright (C) 1998, 2002, 2004 Free Software Foundation, Inc.

	This file is part of GNU Classpath.

	GNU Classpath is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	GNU Classpath is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with GNU Classpath; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301 USA.

	Linking this library statically or dynamically with other modules is
	making a combined work based on this library. Thus, the terms and
	conditions of the GNU General Public License cover the whole
	combination.

	As a special exception, the copyright holders of this library give you
	permission to link this library with independent modules to produce an
	executable, regardless of the license terms of these independent
	modules, and to copy and distribute the resulting executable under
	terms of your choice, provided that you also meet, for each linked
	independent module, the terms and conditions of the license of that
	module. An independent module is a module which is not derived from
	or based on this library. If you modify this library, you may extend
	this exception to your version of the library, but you are not
	obligated to do so. If you do not wish to do so, delete this
	exception statement from your version. */

	/* do not move; needed here because of some macro definitions */
	#include <config.h>

	#include <stdio.h>
	#include <stdlib.h>

	#include <jni.h>
	#include <jcl.h>

	#include "target_native.h"
	#ifndef WITHOUT_FILESYSTEM
	#include "target_native_file.h"
	#endif
	#include "target_native_math_int.h"

	#include "javaio.h"

	/*
	* Function to open a file
	*/

	jint
	_javaio_open_read (JNIEnv * env, jstring name)
	{
	#ifndef WITHOUT_FILESYSTEM
	const char *filename;
	int fd;
	int result;

	filename = JCL_jstring_to_cstring (env, name);
	if (filename == NULL)
	return (-1);

	TARGET_NATIVE_FILE_OPEN_READ (filename, fd, result);
	(*env)->ReleaseStringUTFChars (env, name, filename);
	if (result != TARGET_NATIVE_OK)
	{
	if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
	JCL_ThrowException (env,
	"java/io/FileNotFoundException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	else
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	}

	JCL_free_cstring (env, name, filename);
	return (fd);
	#else /* not WITHOUT_FILESYSTEM */
	return (-1);
	#endif /* not WITHOUT_FILESYSTEM */
	}

	/*
	* Function to open a file for reading/writing
	*/

	jint
	_javaio_open_readwrite (JNIEnv * env, jstring name)
	{
	#ifndef WITHOUT_FILESYSTEM
	const char *filename;
	int fd;
	int result;

	filename = JCL_jstring_to_cstring (env, name);
	if (filename == NULL)
	return (-1);

	TARGET_NATIVE_FILE_OPEN_READWRITE (filename, fd, result);
	(*env)->ReleaseStringUTFChars (env, name, filename);
	if (result != TARGET_NATIVE_OK)
	{
	if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
	JCL_ThrowException (env,
	"java/io/FileNotFoundException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	else
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	}

	JCL_free_cstring (env, name, filename);
	return (fd);
	#else /* not WITHOUT_FILESYSTEM */
	return (-1);
	#endif /* not WITHOUT_FILESYSTEM */
	}

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

	/*
	* Function to close a file
	*/

	void
	_javaio_close (JNIEnv * env, jint fd)
	{
	#ifndef WITHOUT_FILESYSTEM
	int result;

	if (fd != -1)
	{
	TARGET_NATIVE_FILE_CLOSE (fd, result);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	}
	#else /* not WITHOUT_FILESYSTEM */
	#endif /* not WITHOUT_FILESYSTEM */
	}

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

	/*
	* Skips bytes in a file
	*/

	jlong
	_javaio_skip_bytes (JNIEnv * env, jint fd, jlong num_bytes)
	{
	#ifndef WITHOUT_FILESYSTEM
	jlong current_offset, new_offset;
	int result;

	TARGET_NATIVE_FILE_SEEK_CURRENT (fd, TARGET_NATIVE_MATH_INT_INT64_CONST_0,
	current_offset, result);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	TARGET_NATIVE_FILE_SEEK_CURRENT (fd, num_bytes, new_offset, result);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	return (TARGET_NATIVE_MATH_INT_INT64_SUB (new_offset, current_offset));
	#else /* not WITHOUT_FILESYSTEM */
	return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
	#endif /* not WITHOUT_FILESYSTEM */
	}

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

	/*
	* Gets the size of the file
	*/

	jlong
	_javaio_get_file_length (JNIEnv * env, jint fd)
	{
	#ifndef WITHOUT_FILESYSTEM
	jlong length;
	int result;

	TARGET_NATIVE_FILE_SIZE (fd, length, result);
	if (result != TARGET_NATIVE_OK)
	{
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());
	return (TARGET_NATIVE_MATH_INT_INT64_CONST_MINUS_1);
	}

	return (length);
	#else /* not WITHOUT_FILESYSTEM */
	return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
	#endif /* not WITHOUT_FILESYSTEM */
	}

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

	/*
	* Reads data from a file
	*/

	jint
	_javaio_read (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
	{
	#ifndef WITHOUT_FILESYSTEM
	jbyte *bufptr;
	int bytesRead;
	int result;

	assert (offset >= 0);
	assert (len >= 0);

	if (len == 0)
	return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */

	bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
	if (bufptr == NULL)
	{
	JCL_ThrowException (env, "java/io/IOException",
	"Internal Error: get byte array fail");
	return (-1);
	}

	TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
	(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	if (bytesRead == 0)
	return (-1);

	return (bytesRead);
	#else /* not WITHOUT_FILESYSTEM */
	jbyte *bufptr;
	int bytesRead;

	assert (offset >= 0);
	assert (len >= 0);

	if ((fd == 0) \|\| (fd == 1) \|\| (fd == 2))
	{
	if (len == 0)
	return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */

	bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
	if (bufptr == NULL)
	{
	JCL_ThrowException (env, "java/io/IOException",
	"Internal Error: get byte array");
	return (-1);
	}

	TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
	(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	if (bytesRead == 0)
	return (-1);

	return (bytesRead);
	}
	else
	{
	return (-1);
	}
	#endif /* not WITHOUT_FILESYSTEM */
	}

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

	/*
	* Writes data to a file
	*/

	jint
	_javaio_write (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
	{
	#ifndef WITHOUT_FILESYSTEM
	jbyte *bufptr;
	int bytes_written;
	int result;

	if (len == 0)
	return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */

	bufptr = (*env)->GetByteArrayElements (env, buf, 0);
	if (bufptr == NULL)
	{
	JCL_ThrowException (env, "java/io/IOException",
	"Internal Error: get byte array");
	return (-1);
	}

	TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
	result);
	(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
	if (result != TARGET_NATIVE_OK)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	if (bytes_written == 0)
	return (-1);

	return (bytes_written);
	#else /* not WITHOUT_FILESYSTEM */
	jbyte *bufptr;
	int bytesWritten;

	if ((fd == 0) \|\| (fd == 1) \|\| (fd == 2))
	{
	if (len == 0)
	return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */

	bufptr = (*env)->GetByteArrayElements (env, buf, 0);
	if (bufptr == NULL)
	{
	JCL_ThrowException (env, "java/io/IOException", "Internal Error");
	return (-1);
	}

	TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
	result);
	(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);

	if (bytes_written == -1)
	JCL_ThrowException (env,
	"java/io/IOException",
	TARGET_NATIVE_LAST_ERROR_STRING ());

	if (bytes_written == 0)
	return (-1);

	return (bytes_written);
	}
	else
	{
	return (-1);
	}
	#endif /* not WITHOUT_FILESYSTEM */
	}