FileInputStream.c revision 3d43823e17818b3c5f45831f830884917b181454
151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 263d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include <sys/ioctl.h> 273d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include <sys/types.h> 283d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include <sys/stat.h> 293d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include <fcntl.h> 303d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include <unistd.h> 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni.h" 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni_util.h" 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jlong.h" 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "io_util.h" 353d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include "io_util_md.h" 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jvm.h" 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "java_io_FileInputStream.h" 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include <fcntl.h> 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include <limits.h> 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "io_util_md.h" 453d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#include "JNIHelp.h" 463d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 473d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski#define NATIVE_METHOD(className, functionName, signature) \ 483d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski{ #functionName, signature, (void*)(className ## _ ## functionName) } 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/*******************************************************************/ 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/ 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/*******************************************************************/ 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskijfieldID fis_fd; /* id for jobject 'fd' in java.io.FileInputStream */ 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/************************************************************** 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * static methods to store field ID's in initializers 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT void JNICALL 613d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_initIDs(JNIEnv *env, jclass fdClass) { 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski fis_fd = (*env)->GetFieldID(env, fdClass, "fd", "Ljava/io/FileDescriptor;"); 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/************************************************************** 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Input stream 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT void JNICALL 703d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_open(JNIEnv *env, jobject this, jstring path) { 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski fileOpen(env, this, path, fis_fd, O_RDONLY); 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 753d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_read0(JNIEnv *env, jobject this) { 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return readSingle(env, this, fis_fd); 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 803d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_readBytes(JNIEnv *env, jobject this, 8151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jbyteArray bytes, jint off, jint len) { 8251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return readBytes(env, this, bytes, off, len, fis_fd); 8351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 8451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 8551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jlong JNICALL 863d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_skip(JNIEnv *env, jobject this, jlong toSkip) { 8751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong cur = jlong_zero; 8851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong end = jlong_zero; 8951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski FD fd = GET_FD(this, fis_fd); 9051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (fd == -1) { 9151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOException (env, "Stream Closed"); 9251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 9351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 9451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if ((cur = IO_Lseek(fd, (jlong)0, (jint)SEEK_CUR)) == -1) { 9551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 9651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } else if ((end = IO_Lseek(fd, toSkip, (jint)SEEK_CUR)) == -1) { 9751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 9851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 9951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return (end - cur); 10051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 10151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 1023d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski// Android added: 1033d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski// TODO: Where does this function come from ? Needs a detailed code review. 1043d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski// Why wasn't IO_Available used. 1053d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebskistatic int available(int fd, jlong *bytes) { 1063d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski jlong cur, end; 1073d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski int mode; 1083d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski struct stat64 buf64; 1093d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 1103d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski if (fstat64(fd, &buf64) >= 0) { 1113d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski mode = buf64.st_mode; 1123d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 1133d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski /* 1143d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski * XXX: is the following call interruptible? If so, this might 1153d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski * need to go through the INTERRUPT_IO() wrapper as for other 1163d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski * blocking, interruptible calls in this file. 1173d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski */ 1183d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski int n; 1193d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski if (ioctl(fd, FIONREAD, &n) >= 0) { 1203d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski *bytes = n; 1213d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski return 1; 1223d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } 1233d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } 1243d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } 1253d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski if ((cur = lseek64(fd, 0L, SEEK_CUR)) == -1) { 1263d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski return 0; 1273d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } else if ((end = lseek64(fd, 0L, SEEK_END)) == -1) { 1283d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski return 0; 1293d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } else if (lseek64(fd, cur, SEEK_SET) == -1) { 1303d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski return 0; 1313d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski } 1323d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski *bytes = end - cur; 1333d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski return 1; 1343d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski} 1353d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 13651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 1373d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_available(JNIEnv *env, jobject this) { 13851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong ret; 13951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski FD fd = GET_FD(this, fis_fd); 14051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (fd == -1) { 14151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOException (env, "Stream Closed"); 14251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 14351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 1443d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski if (available(fd, &ret)) { 14551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (ret > INT_MAX) { 14651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ret = (jlong) INT_MAX; 14751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 14851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return jlong_to_jint(ret); 14951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 15051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, NULL); 15151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 15251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 1533d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 1543d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiJNIEXPORT void JNICALL 1553d43823e17818b3c5f45831f830884917b181454Piotr JastrzebskiFileInputStream_close0(JNIEnv *env, jobject this) { 1563d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski fileClose(env, this, fis_fd); 1573d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski} 1583d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 1593d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebskistatic JNINativeMethod gMethods[] = { 1603d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, initIDs, "()V"), 1613d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, open, "(Ljava/lang/String;)V"), 1623d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, read0, "()I"), 1633d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, readBytes, "([BII)I"), 1643d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, skip, "(J)J"), 1653d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, available, "()I"), 1663d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski NATIVE_METHOD(FileInputStream, close0, "()V"), 1673d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski}; 1683d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski 1693d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebskivoid register_java_io_FileInputStream(JNIEnv* env) { 1703d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski jniRegisterNativeMethods(env, "java/io/FileInputStream", gMethods, NELEM(gMethods)); 1713d43823e17818b3c5f45831f830884917b181454Piotr Jastrzebski} 172