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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/java/util/zip/natInflater.cc | |
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Diffstat (limited to 'libjava/java/util/zip/natInflater.cc')
-rw-r--r-- | libjava/java/util/zip/natInflater.cc | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/libjava/java/util/zip/natInflater.cc b/libjava/java/util/zip/natInflater.cc new file mode 100644 index 000000000..69de6c335 --- /dev/null +++ b/libjava/java/util/zip/natInflater.cc @@ -0,0 +1,214 @@ +// natInflater.cc - Implementation of Inflater native methods. + +/* Copyright (C) 1999, 2002 Free Software Foundation + + This file is part of libgcj. + +This software is copyrighted work licensed under the terms of the +Libgcj License. Please consult the file "LIBGCJ_LICENSE" for +details. */ + +// Written by Tom Tromey <tromey@cygnus.com> + +#include <config.h> + +#include <zlib.h> +#include <stdlib.h> + +#include <gcj/cni.h> +#include <jvm.h> + +#include <java/util/zip/Inflater.h> +#include <java/util/zip/DataFormatException.h> + +#include <java/lang/InternalError.h> +#include <java/lang/NullPointerException.h> +#include <java/lang/ArrayIndexOutOfBoundsException.h> +#include <java/lang/OutOfMemoryError.h> + + + +// A couple of helper functions used to interface with zlib's +// allocation. + +void * +_Jv_ZMalloc (void *, uInt nitems, uInt size) +{ + return _Jv_Malloc (nitems * size); +} + +void +_Jv_ZFree (void *, void *addr) +{ + _Jv_Free (addr); +} + + + +void +java::util::zip::Inflater::end () +{ + JvSynchronize sync (this); + // Just ignore errors. + inflateEnd ((z_streamp) zstream); + _Jv_Free (zstream); + zstream = NULL; +} + +jint +java::util::zip::Inflater::getAdler () +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + return s->adler; +} + +jint +java::util::zip::Inflater::getRemaining () +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + return s->avail_in; +} + +jint +java::util::zip::Inflater::getTotalIn () +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + return s->total_in; +} + +jint +java::util::zip::Inflater::getTotalOut () +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + return s->total_out; +} + +jint +java::util::zip::Inflater::inflate (jbyteArray buf, jint off, jint len) +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + + if (! buf) + throw new java::lang::NullPointerException; + if (off < 0 || len < 0 || off + len > buf->length) + throw new java::lang::ArrayIndexOutOfBoundsException; + + if (len == 0) + return 0; + + s->next_out = (Bytef *) (elements (buf) + off); + s->avail_out = len; + + switch (::inflate (s, Z_SYNC_FLUSH)) + { + case Z_BUF_ERROR: + /* Using the no_header option, zlib requires an extra padding byte at the + end of the stream in order to successfully complete decompression (see + zlib/contrib/minizip/unzip.c). We don't do this, so can end up with a + Z_BUF_ERROR at the end of a stream when zlib has completed inflation + and there's no more input. Thats not a problem. */ + if (s->avail_in != 0) + throw new java::lang::InternalError; + // Fall through. + + case Z_STREAM_END: + is_finished = true; + if (s->avail_out == (unsigned int) len) + return -1; + break; + + case Z_NEED_DICT: + dict_needed = true; + break; + + case Z_DATA_ERROR: + throw new java::util::zip::DataFormatException + (s->msg == NULL ? NULL : JvNewStringLatin1 (s->msg)); + break; + + case Z_MEM_ERROR: + throw new java::lang::OutOfMemoryError; + break; + + case Z_OK: + break; + } + + return len - s->avail_out; +} + +void +java::util::zip::Inflater::reset () +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + // Just ignore errors. + inflateReset (s); + s->avail_in = 0; + is_finished = false; + dict_needed = false; +} + +void +java::util::zip::Inflater::setDictionary (jbyteArray buf, jint off, jint len) +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + + if (! buf) + throw new java::lang::NullPointerException; + if (off < 0 || len < 0 || off + len > buf->length) + throw new java::lang::ArrayIndexOutOfBoundsException; + + // Ignore errors. + inflateSetDictionary (s, (Bytef *) (elements (buf) + off), len); + dict_needed = false; +} + +void +java::util::zip::Inflater::setInput (jbyteArray buf, jint off, jint len) +{ + JvSynchronize sync (this); + z_streamp s = (z_streamp) zstream; + + if (! buf) + throw new java::lang::NullPointerException; + if (off < 0 || len < 0 || off + len > buf->length) + throw new java::lang::ArrayIndexOutOfBoundsException; + + s->next_in = (Bytef *) (elements (buf) + off); + s->avail_in = len; +} + +void +java::util::zip::Inflater::init (jboolean no_header) +{ + z_stream_s *stream = (z_stream_s *) _Jv_Malloc (sizeof (z_stream_s)); + stream->next_in = Z_NULL; + stream->avail_in = 0; + stream->zalloc = _Jv_ZMalloc; + stream->zfree = _Jv_ZFree; + stream->opaque = NULL; + + // Handle NO_HEADER using undocumented zlib feature. + int wbits = MAX_WBITS; + if (no_header) + wbits = - wbits; + + if (inflateInit2 (stream, wbits) != Z_OK) + { + jstring msg = NULL; + if (stream->msg != NULL) + msg = JvNewStringLatin1 (stream->msg); + throw new java::lang::InternalError (msg); + } + + zstream = reinterpret_cast<gnu::gcj::RawData *> (stream); + is_finished = false; + dict_needed = false; +} |