diff options
Diffstat (limited to 'libjava/classpath/native/jni/java-nio/gnu_java_nio_charset_iconv_IconvDecoder.c')
| -rw-r--r-- | libjava/classpath/native/jni/java-nio/gnu_java_nio_charset_iconv_IconvDecoder.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/java-nio/gnu_java_nio_charset_iconv_IconvDecoder.c b/libjava/classpath/native/jni/java-nio/gnu_java_nio_charset_iconv_IconvDecoder.c new file mode 100644 index 000000000..248a948c3 --- /dev/null +++ b/libjava/classpath/native/jni/java-nio/gnu_java_nio_charset_iconv_IconvDecoder.c @@ -0,0 +1,208 @@ +/* gnu_java_nio_charset_iconv_IconvDecoder.c -- + Copyright (C) 2005 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. */ + +#include <config.h> +#include <jcl.h> + +#include <stdio.h> +#include <assert.h> +#include <errno.h> + +#if defined(HAVE_ICONV) +#include <iconv.h> +#endif + +#include "gnu_java_nio_charset_iconv_IconvDecoder.h" + +#if defined(HAVE_ICONV) +static void createRawData (JNIEnv * env, jobject obj, void *ptr); +static void *getData (JNIEnv * env, jobject obj); + +static jfieldID infid = NULL; +static jfieldID outfid = NULL; +#endif + +/* Union used for type punning. */ +union char_union +{ + jbyte **jb; + jchar **jc; + char **c; +}; + +JNIEXPORT void JNICALL +Java_gnu_java_nio_charset_iconv_IconvDecoder_openIconv (JNIEnv * env UNUSED, + jobject obj UNUSED, + jstring jname UNUSED) +{ +#if defined(HAVE_ICONV) + iconv_t iconv_object; + jclass cls; + + const char *name = JCL_jstring_to_cstring (env, jname); + if (name == NULL) + return; + + /* Cache fieldIDs for use in decode function. */ + if (infid == NULL || outfid == NULL) + { + cls = (*env)->GetObjectClass (env, obj); + infid = (*env)->GetFieldID (env, cls, "inremaining", "I"); + assert (infid != 0); + outfid = (*env)->GetFieldID (env, cls, "outremaining", "I"); + assert (outfid != 0); + } + + /* to java from "name", native java format depends on endianness */ +#ifdef WORDS_BIGENDIAN + iconv_object = iconv_open ("UTF-16BE", name); +#else + iconv_object = iconv_open ("UTF-16LE", name); +#endif + + JCL_free_cstring (env, jname, name); + if ((long) iconv_object == -1L) + { + JCL_ThrowException (env, "java/lang/IllegalArgumentException", + "Charset not available"); + return; + } + createRawData (env, obj, (void *) iconv_object); +#else + JCL_ThrowException (env, "java/lang/IllegalArgumentException", + "iconv not available"); +#endif +} + +JNIEXPORT jint JNICALL +Java_gnu_java_nio_charset_iconv_IconvDecoder_decode (JNIEnv * env UNUSED, + jobject obj UNUSED, + jbyteArray inArr UNUSED, + jcharArray outArr UNUSED, + jint posIn UNUSED, + jint remIn UNUSED, + jint posOut UNUSED, + jint remOut UNUSED) +{ +#if defined(HAVE_ICONV) + iconv_t iconv_object = getData (env, obj); + size_t retval; + union char_union in, out; + jbyte *input, *inputcopy; + jchar *output, *outputcopy; + size_t lenIn = (size_t) remIn; + size_t lenOut = (size_t) remOut * 2; + + inputcopy = input = (*env)->GetByteArrayElements (env, inArr, 0); + outputcopy = output = (*env)->GetCharArrayElements (env, outArr, 0); + + input += posIn; + output += posOut; + + in.jb = &input; + out.jc = &output; + retval = iconv (iconv_object, (ICONV_CONST char **) in.c, &lenIn, + out.c, &lenOut); + + /* XXX: Do we need to relase the input array? It's not modified. */ + (*env)->ReleaseByteArrayElements (env, inArr, inputcopy, 0); + (*env)->ReleaseCharArrayElements (env, outArr, outputcopy, 0); + + if (retval == (size_t) (-1)) + { + if (errno == EILSEQ) + retval = 1; + else + retval = 0; + } + else + retval = 0; + + (*env)->SetIntField (env, obj, infid, (jint) lenIn); + (*env)->SetIntField (env, obj, outfid, (jint) (lenOut >> 1)); + + return (jint) retval; +#else + return -1; +#endif +} + +JNIEXPORT void JNICALL +Java_gnu_java_nio_charset_iconv_IconvDecoder_closeIconv (JNIEnv * env UNUSED, + jobject obj UNUSED) +{ +#if defined(HAVE_ICONV) + iconv_t iconv_object; + iconv_object = getData (env, obj); + iconv_close (iconv_object); +#endif +} + + +#if defined(HAVE_ICONV) +static void +createRawData (JNIEnv * env, jobject obj, void *ptr) +{ + jclass cls; + jobject data; + jfieldID data_fid; + + cls = (*env)->GetObjectClass (env, obj); + data_fid = (*env)->GetFieldID (env, cls, "data", "Lgnu/classpath/Pointer;"); + assert (data_fid != 0); + + data = JCL_NewRawDataObject(env, ptr); + + (*env)->SetObjectField (env, obj, data_fid, data); +} + +static void * +getData (JNIEnv * env, jobject obj) +{ + jclass cls; + jfieldID data_fid; + jobject data; + + cls = (*env)->GetObjectClass (env, obj); + data_fid = (*env)->GetFieldID (env, cls, "data", "Lgnu/classpath/Pointer;"); + assert (data_fid != 0); + data = (*env)->GetObjectField (env, obj, data_fid); + + return JCL_GetRawData(env, data); +} +#endif + |