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implement Inflater and InflaterInputStream

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This commit is contained in:
Joel Dice
2007-09-17 16:15:16 -06:00
parent 8af76b0da6
commit 923c4661e8
4 changed files with 243 additions and 2 deletions
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75
classpath/java-util-zip.cpp Normal file
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@ -0,0 +1,75 @@
#include "stdlib.h"
#include "string.h"
#include "zlib.h"
#include "jni.h"
#include "jni-util.h"
#undef JNIEXPORT
#define JNIEXPORT __attribute__ ((visibility("default")))
extern "C" JNIEXPORT jlong JNICALL
Java_java_util_zip_Inflater_make
(JNIEnv* e, jclass, jboolean nowrap)
{
z_stream* s = static_cast<z_stream*>(malloc(sizeof(z_stream)));
memset(s, 0, sizeof(z_stream));
int r = inflateInit2(s, (nowrap ? -15 : 15));
if (r != Z_OK) {
free(s);
throwNew(e, "java/lang/RuntimeException", zError(r));
return 0;
}
return reinterpret_cast<jlong>(s);
}
extern "C" JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_dispose(JNIEnv*, jclass, jlong peer)
{
z_stream* s = reinterpret_cast<z_stream*>(peer);
inflateEnd(s);
free(s);
}
extern "C" JNIEXPORT void JNICALL
Java_java_util_zip_Inflater_inflate
(JNIEnv* e, jclass, jlong peer,
jbyteArray input, jint inputOffset, jint inputLength,
jbyteArray output, jint outputOffset, jint outputLength,
jintArray results)
{
z_stream* s = reinterpret_cast<z_stream*>(peer);
jbyte* in = static_cast<jbyte*>(malloc(inputLength));
if (in == 0) {
throwNew(e, "java/lang/OutOfMemoryError", 0);
return;
}
jbyte* out = static_cast<jbyte*>(malloc(outputLength));
if (out == 0) {
free(in);
throwNew(e, "java/lang/OutOfMemoryError", 0);
return;
}
e->GetByteArrayRegion(input, inputOffset, inputLength, in);
s->next_in = reinterpret_cast<Bytef*>(in);
s->avail_in = inputLength;
s->next_out = reinterpret_cast<Bytef*>(out);
s->avail_out = outputLength;
int r = inflate(s, Z_SYNC_FLUSH);
jint resultArray[3]
= { r, inputLength - s->avail_in, outputLength - s->avail_out };
free(in);
e->SetByteArrayRegion(output, outputOffset, resultArray[2], out);
free(out);
e->SetIntArrayRegion(results, 0, 3, resultArray);
}