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Diffstat (limited to 'epan/compress/lzxpress.c')
| -rw-r--r-- | epan/compress/lzxpress.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/epan/compress/lzxpress.c b/epan/compress/lzxpress.c deleted file mode 100644 index 381089077c..0000000000 --- a/epan/compress/lzxpress.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Copyright (C) Matthieu Suiche 2008 - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the author nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -#include "lzxpress.h" - -#define __BUF_POS_CONST(buf,ofs)(((const guint8 *)buf)+(ofs)) -#define __PULL_BYTE(buf,ofs) \ - ((guint8)((*__BUF_POS_CONST(buf,ofs)) & 0xFF)) - -#ifndef PULL_LE_UINT16 -#define PULL_LE_UINT16(buf,ofs) ((guint16)( \ - ((guint16)(((guint16)(__PULL_BYTE(buf,(ofs)+0))) << 0)) | \ - ((guint16)(((guint16)(__PULL_BYTE(buf,(ofs)+1))) << 8)) \ -)) -#endif - -#ifndef PULL_LE_UINT32 -#define PULL_LE_UINT32(buf,ofs) ((guint32)( \ - ((guint32)(((guint32)(__PULL_BYTE(buf,(ofs)+0))) << 0)) | \ - ((guint32)(((guint32)(__PULL_BYTE(buf,(ofs)+1))) << 8)) | \ - ((guint32)(((guint32)(__PULL_BYTE(buf,(ofs)+2))) << 16)) | \ - ((guint32)(((guint32)(__PULL_BYTE(buf,(ofs)+3))) << 24)) \ -)) -#endif - -gssize lzxpress_decompress(const guint8 *input, - guint32 input_size, - guint8 *output, - guint32 max_output_size) -{ - guint32 output_index, input_index; - guint32 indicator, indicator_bit; - guint32 length; - guint32 offset; - guint32 nibble_index; - - output_index = 0; - input_index = 0; - indicator = 0; - indicator_bit = 0; - nibble_index = 0; - - do { - if (indicator_bit == 0) { - indicator = PULL_LE_UINT32(input, input_index); - input_index += (guint32)sizeof(guint32); - indicator_bit = 32; - } - indicator_bit--; - - /* - * check whether the bit specified by indicator_bit is set or not - * set in indicator. For example, if indicator_bit has value 4 - * check whether the 4th bit of the value in indicator is set - */ - if (((indicator >> indicator_bit) & 1) == 0) { - output[output_index] = input[input_index]; - input_index += (guint32)sizeof(guint8); - output_index += (guint32)sizeof(guint8); - } else { - length = PULL_LE_UINT16(input, input_index); - input_index += (guint32)sizeof(guint16); - offset = length / 8; - length = length % 8; - - if (length == 7) { - if (nibble_index == 0) { - nibble_index = input_index; - length = input[input_index] % 16; - input_index += (guint32)sizeof(guint8); - } else { - length = input[nibble_index] / 16; - nibble_index = 0; - } - - if (length == 15) { - length = input[input_index]; - input_index += (guint32)sizeof(guint8); - if (length == 255) { - length = PULL_LE_UINT16(input, input_index); - input_index += (guint32)sizeof(guint16); - length -= (15 + 7); - } - length += 15; - } - length += 7; - } - - length += 3; - - do { - if ((output_index >= max_output_size) || ((offset + 1) > output_index)) break; - - output[output_index] = output[output_index - offset - 1]; - - output_index += (guint32)sizeof(guint8); - length -= (guint32)sizeof(guint8); - } while (length != 0); - } - } while ((output_index < max_output_size) && (input_index < (input_size))); - - return output_index; -} |