1 /*
   2  * Copyright (c) 1995, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any

  50 #ifdef __APPLE__
  51 /* use setjmp/longjmp versions that do not save/restore the signal mask */
  52 #define setjmp _setjmp
  53 #define longjmp _longjmp
  54 #endif
  55 
  56 /* The method IDs we cache. Note that the last two belongs to the
  57  * java.io.InputStream class.
  58  */
  59 static jmethodID sendHeaderInfoID;
  60 static jmethodID sendPixelsByteID;
  61 static jmethodID sendPixelsIntID;
  62 static jmethodID InputStream_readID;
  63 static jmethodID InputStream_availableID;
  64 
  65 /* Initialize the Java VM instance variable when the library is
  66    first loaded */
  67 JavaVM *jvm;
  68 
  69 JNIEXPORT jint JNICALL
  70 JNI_OnLoad(JavaVM *vm, void *reserved)
  71 {
  72     jvm = vm;
  73     return JNI_VERSION_1_2;
  74 }
  75 
  76 /*
  77  * ERROR HANDLING:
  78  *
  79  * The JPEG library's standard error handler (jerror.c) is divided into
  80  * several "methods" which you can override individually.  This lets you
  81  * adjust the behavior without duplicating a lot of code, which you might
  82  * have to update with each future release.
  83  *
  84  * Our example here shows how to override the "error_exit" method so that
  85  * control is returned to the library's caller when a fatal error occurs,
  86  * rather than calling exit() as the standard error_exit method does.
  87  *
  88  * We use C's setjmp/longjmp facility to return control.  This means that the
  89  * routine which calls the JPEG library must first execute a setjmp() call to
  90  * establish the return point.  We want the replacement error_exit to do a

   1 /*
   2  * Copyright (c) 1995, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any

  50 #ifdef __APPLE__
  51 /* use setjmp/longjmp versions that do not save/restore the signal mask */
  52 #define setjmp _setjmp
  53 #define longjmp _longjmp
  54 #endif
  55 
  56 /* The method IDs we cache. Note that the last two belongs to the
  57  * java.io.InputStream class.
  58  */
  59 static jmethodID sendHeaderInfoID;
  60 static jmethodID sendPixelsByteID;
  61 static jmethodID sendPixelsIntID;
  62 static jmethodID InputStream_readID;
  63 static jmethodID InputStream_availableID;
  64 
  65 /* Initialize the Java VM instance variable when the library is
  66    first loaded */
  67 JavaVM *jvm;
  68 
  69 JNIEXPORT jint JNICALL
  70 DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
  71 {
  72     jvm = vm;
  73     return JNI_VERSION_1_2;
  74 }
  75 
  76 /*
  77  * ERROR HANDLING:
  78  *
  79  * The JPEG library's standard error handler (jerror.c) is divided into
  80  * several "methods" which you can override individually.  This lets you
  81  * adjust the behavior without duplicating a lot of code, which you might
  82  * have to update with each future release.
  83  *
  84  * Our example here shows how to override the "error_exit" method so that
  85  * control is returned to the library's caller when a fatal error occurs,
  86  * rather than calling exit() as the standard error_exit method does.
  87  *
  88  * We use C's setjmp/longjmp facility to return control.  This means that the
  89  * routine which calls the JPEG library must first execute a setjmp() call to
  90  * establish the return point.  We want the replacement error_exit to do a