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Diffstat (limited to 'src/streams-zlib.cpp')
| -rw-r--r-- | src/streams-zlib.cpp | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/src/streams-zlib.cpp b/src/streams-zlib.cpp deleted file mode 100644 index 2d5fae01e..000000000 --- a/src/streams-zlib.cpp +++ /dev/null @@ -1,230 +0,0 @@ -/* - * IO layer : zlib streambuf - * - * Authors: - * Johan Ceuppens <jceuppen at easynet dot be> - * - * Copyright (C) 2004 Johan Ceuppens - * - * Released under GNU LGPL, read the file 'COPYING.LIB' for more information - */ - -#include <cstring> -#include <string> -#include <string.h> -#include <vector> -#include "streams-zlib.h" - -namespace Inkscape { - -/** - * ZlibBuffer - */ - -ZlibBuffer::ZlibBuffer(URIHandle& urih) - : _urihandle(&urih), _putsize(BUFSIZE_STREAM), _getsize(BUFSIZE_STREAM) -{ - init_inflation(); -} - -int ZlibBuffer::allocate_buffers() -{ - if (!eback()) { - char *buf = new char[_getsize + _putsize]; - setg(buf, buf , buf); - buf += _getsize; - setp(buf, buf + _putsize); - return 1; - } - return 0; -} - -int ZlibBuffer::reallocate_buffers(int new_getsize, int new_putsize) -{ - char *new_buffer = new char[new_getsize + new_putsize]; - - std::memcpy(new_buffer, eback(), _getsize); - std::memcpy(new_buffer, eback() + _getsize, _putsize); - - setg(new_buffer, new_buffer + (gptr() - eback()), - new_buffer + new_getsize); - new_buffer += new_getsize; - setp(new_buffer, new_buffer + new_putsize); - - _getsize = new_getsize; - _putsize = new_putsize; - - return 1; -} - -int ZlibBuffer::underflow() -{ - if (eback() == 0 && allocate_buffers() == 0) - return EOF; - - if (consume_and_inflate() == EOF) - return EOF; - - return *(unsigned char *)gptr(); -} - -int ZlibBuffer::overflow(int c) -{ - if (c == EOF) - return flush_output(); - - if (pbase() == 0 && allocate_buffers() == 0) - return EOF; - - if (pptr() >= epptr() && - flush_output() == EOF) - return EOF; - - putchar(c); - - if (pptr() >= epptr() && - flush_output() == EOF) - return EOF; - - return c; -} - -int ZlibBuffer::consume(guint8 *buf, int nbytes) -{ - return do_consume(buf, nbytes); -} - -int ZlibBuffer::do_consume(guint8 *buf, int nbytes) -{ - nbytes = _urihandle->read(buf, nbytes); - - if (nbytes == EOF) - return EOF; - else if (nbytes == 0) - return EOF; - - return nbytes; -} - -int ZlibBuffer::do_consume_and_inflate(int nbytes) -{ - std::vector<guint8> buf(nbytes); - - int ret=consume(&buf[0], nbytes); - - if ( ret != EOF ) { - ret = 1; - GByteArray *gba = inflate(&buf[0], nbytes); - copy_to_get(gba->data, gba->len); - g_byte_array_free(gba, TRUE); - } - - return ret; -} - -int ZlibBuffer::consume_and_inflate() -{ - return do_consume_and_inflate(BUFSIZE_STREAM); -} - -int ZlibBuffer::flush_output() -{ - if (pptr() <= pbase()) - return 0; - int len = pptr() - pbase(); - int nbytes = _urihandle->write(pbase(), len); - setp(pbase(), pbase() + BUFSIZE_STREAM); - if (len == nbytes) - return 0; - else - return EOF; -} - -void ZlibBuffer::init_inflation() throw(ZlibBufferException) -{ - memset(&_zs, 0, sizeof(z_stream)); - - _zs.zalloc = Z_NULL; - _zs.zfree = Z_NULL; - _zs.opaque = Z_NULL; - - if(inflateInit2(&_zs, -15) != Z_OK) { - throw ZlibBufferException(); - } - -} - -void ZlibBuffer::reset_inflation() throw(ZlibBufferException) -{ - if (inflateReset(&_zs) != Z_OK) - throw ZlibBufferException(); -} - -GByteArray *ZlibBuffer::inflate(guint8 *in_buffer, int nbytes) -{ - return do_inflate(in_buffer, nbytes); -} - -GByteArray *ZlibBuffer::do_inflate(guint8 *data, int nbytes) -{ - GByteArray *gba = g_byte_array_new(); - guint8 out_buffer[BUFSIZE_STREAM]; - - _zs.avail_in = 0; - guint32 crc = crc32(0, Z_NULL, 0); - - if (!_zs.avail_in) { - _zs.avail_in = nbytes; - _zs.next_in = (Bytef *)data; - crc = crc32(crc, (Bytef *)data, _zs.avail_in); - } - do { - _zs.next_out = out_buffer; - _zs.avail_out = BUFSIZE_STREAM; - - int ret = ::inflate(&_zs, Z_NO_FLUSH); - if (BUFSIZE_STREAM != _zs.avail_out) { - unsigned int tmp_len = BUFSIZE_STREAM - _zs.avail_out; - g_byte_array_append(gba, out_buffer, tmp_len); - } - - if (ret == Z_STREAM_END) { - break; - } - if (ret != Z_OK) { - std::fprintf(stderr, "decompression error %d\n", ret); - break; - } - } while (_zs.avail_in); - - return gba; -} - -int ZlibBuffer::copy_to_get(guint8 *data, int nbytes) -{ - return do_copy_to_get(data, nbytes); -} - -int ZlibBuffer::do_copy_to_get(guint8 *data, int nbytes) -{ - if (nbytes + gptr() - eback() > _getsize) - reallocate_buffers(nbytes + gptr() - eback() + BUFSIZE_STREAM, - _putsize); - - std::memcpy(gptr(), data, nbytes); - setg(eback(), gptr(), gptr() + nbytes); - return 1; -} - -} // namespace Inkscape - -/* - Local Variables: - mode:c++ - c-file-style:"stroustrup" - c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) - indent-tabs-mode:nil - fill-column:99 - End: -*/ -// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : |