Initial revision
From-SVN: r102074
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Tom Tromey
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6f4434b39b
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4557 changed files with 1000262 additions and 0 deletions
363
libjava/classpath/native/jni/java-io/javaio.c
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363
libjava/classpath/native/jni/java-io/javaio.c
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/* javaio.c - Common java.io native functions
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Copyright (C) 1998, 2002, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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/* do not move; needed here because of some macro definitions */
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <jni.h>
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#include <jcl.h>
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#include "target_native.h"
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#ifndef WITHOUT_FILESYSTEM
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#include "target_native_file.h"
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#endif
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#include "target_native_math_int.h"
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#include "javaio.h"
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/*
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* Function to open a file
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*/
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jint
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_javaio_open_read (JNIEnv * env, jstring name)
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{
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#ifndef WITHOUT_FILESYSTEM
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const char *filename;
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int fd;
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int result;
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filename = JCL_jstring_to_cstring (env, name);
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if (filename == NULL)
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return (-1);
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TARGET_NATIVE_FILE_OPEN_READ (filename, fd, result);
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(*env)->ReleaseStringUTFChars (env, name, filename);
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if (result != TARGET_NATIVE_OK)
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{
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if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
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JCL_ThrowException (env,
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"java/io/FileNotFoundException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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else
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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}
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JCL_free_cstring (env, name, filename);
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return (fd);
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#else /* not WITHOUT_FILESYSTEM */
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return (-1);
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*
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* Function to open a file for reading/writing
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*/
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jint
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_javaio_open_readwrite (JNIEnv * env, jstring name)
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{
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#ifndef WITHOUT_FILESYSTEM
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const char *filename;
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int fd;
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int result;
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filename = JCL_jstring_to_cstring (env, name);
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if (filename == NULL)
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return (-1);
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TARGET_NATIVE_FILE_OPEN_READWRITE (filename, fd, result);
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(*env)->ReleaseStringUTFChars (env, name, filename);
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if (result != TARGET_NATIVE_OK)
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{
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if (TARGET_NATIVE_LAST_ERROR () == TARGET_NATIVE_ERROR_NO_SUCH_FILE)
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JCL_ThrowException (env,
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"java/io/FileNotFoundException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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else
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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}
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JCL_free_cstring (env, name, filename);
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return (fd);
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#else /* not WITHOUT_FILESYSTEM */
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return (-1);
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*************************************************************************/
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/*
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* Function to close a file
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*/
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void
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_javaio_close (JNIEnv * env, jint fd)
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{
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#ifndef WITHOUT_FILESYSTEM
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int result;
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if (fd != -1)
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{
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TARGET_NATIVE_FILE_CLOSE (fd, result);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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}
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#else /* not WITHOUT_FILESYSTEM */
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*************************************************************************/
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/*
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* Skips bytes in a file
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*/
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jlong
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_javaio_skip_bytes (JNIEnv * env, jint fd, jlong num_bytes)
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{
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#ifndef WITHOUT_FILESYSTEM
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jlong current_offset, new_offset;
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int result;
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TARGET_NATIVE_FILE_SEEK_CURRENT (fd, TARGET_NATIVE_MATH_INT_INT64_CONST_0,
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current_offset, result);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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TARGET_NATIVE_FILE_SEEK_CURRENT (fd, num_bytes, new_offset, result);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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return (TARGET_NATIVE_MATH_INT_INT64_SUB (new_offset, current_offset));
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#else /* not WITHOUT_FILESYSTEM */
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return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*************************************************************************/
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/*
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* Gets the size of the file
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*/
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jlong
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_javaio_get_file_length (JNIEnv * env, jint fd)
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{
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#ifndef WITHOUT_FILESYSTEM
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jlong length;
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int result;
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TARGET_NATIVE_FILE_SIZE (fd, length, result);
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if (result != TARGET_NATIVE_OK)
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{
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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return (TARGET_NATIVE_MATH_INT_INT64_CONST_MINUS_1);
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}
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return (length);
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#else /* not WITHOUT_FILESYSTEM */
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return (TARGET_NATIVE_MATH_INT_INT64_CONST_0);
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*************************************************************************/
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/*
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* Reads data from a file
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*/
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jint
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_javaio_read (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
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{
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#ifndef WITHOUT_FILESYSTEM
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jbyte *bufptr;
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int bytesRead;
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int result;
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assert (offset >= 0);
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assert (len >= 0);
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if (len == 0)
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return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */
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bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
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if (bufptr == NULL)
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{
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JCL_ThrowException (env, "java/io/IOException",
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"Internal Error: get byte array fail");
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return (-1);
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}
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TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
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(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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if (bytesRead == 0)
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return (-1);
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return (bytesRead);
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#else /* not WITHOUT_FILESYSTEM */
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jbyte *bufptr;
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int bytesRead;
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assert (offset >= 0);
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assert (len >= 0);
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if ((fd == 0) || (fd == 1) || (fd == 2))
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{
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if (len == 0)
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return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */
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bufptr = (*env)->GetByteArrayElements (env, buf, JNI_FALSE);
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if (bufptr == NULL)
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{
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JCL_ThrowException (env, "java/io/IOException",
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"Internal Error: get byte array");
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return (-1);
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}
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TARGET_NATIVE_FILE_READ (fd, (bufptr + offset), len, bytesRead, result);
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(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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if (bytesRead == 0)
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return (-1);
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return (bytesRead);
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}
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else
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{
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return (-1);
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}
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#endif /* not WITHOUT_FILESYSTEM */
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}
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/*************************************************************************/
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/*
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* Writes data to a file
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*/
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jint
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_javaio_write (JNIEnv * env, jint fd, jarray buf, jint offset, jint len)
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{
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#ifndef WITHOUT_FILESYSTEM
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jbyte *bufptr;
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int bytes_written;
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int result;
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if (len == 0)
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return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */
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bufptr = (*env)->GetByteArrayElements (env, buf, 0);
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if (bufptr == NULL)
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{
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JCL_ThrowException (env, "java/io/IOException",
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"Internal Error: get byte array");
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return (-1);
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}
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TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
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result);
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(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
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if (result != TARGET_NATIVE_OK)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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if (bytes_written == 0)
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return (-1);
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return (bytes_written);
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#else /* not WITHOUT_FILESYSTEM */
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jbyte *bufptr;
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int bytesWritten;
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if ((fd == 0) || (fd == 1) || (fd == 2))
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{
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if (len == 0)
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return 0; /* Nothing todo, and GetByteArrayElements() seems undefined. */
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bufptr = (*env)->GetByteArrayElements (env, buf, 0);
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if (bufptr == NULL)
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{
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JCL_ThrowException (env, "java/io/IOException", "Internal Error");
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return (-1);
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}
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TARGET_NATIVE_FILE_WRITE (fd, (bufptr + offset), len, bytes_written,
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result);
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(*env)->ReleaseByteArrayElements (env, buf, bufptr, 0);
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if (bytes_written == -1)
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JCL_ThrowException (env,
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"java/io/IOException",
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TARGET_NATIVE_LAST_ERROR_STRING ());
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if (bytes_written == 0)
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return (-1);
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return (bytes_written);
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}
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else
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{
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return (-1);
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}
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#endif /* not WITHOUT_FILESYSTEM */
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}
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