diff options
Diffstat (limited to 'libjava/classpath/native/jni/java-io/javaio.c')
| -rw-r--r-- | libjava/classpath/native/jni/java-io/javaio.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/java-io/javaio.c b/libjava/classpath/native/jni/java-io/javaio.c new file mode 100644 index 0000000..6dc3de8 --- /dev/null +++ b/libjava/classpath/native/jni/java-io/javaio.c @@ -0,0 +1,363 @@ +/* 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 */ +} |