105 lines
2.4 KiB
C++
105 lines
2.4 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright:
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* 2013-2015, Danny Robson <danny@nerdcruft.net>
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*/
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#include "zlib.hpp"
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#include "debug.hpp"
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const char *
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util::zlib::version (void) {
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return zlibVersion ();
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}
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const char*
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util::zlib::code_to_string (int code) {
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static const int MIN_CODE = -6;
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static const int MAX_CODE = 2;
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if (code > MAX_CODE || code < MIN_CODE) {
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unreachable ();
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}
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static const char* CODES[] = {
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"OK",
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"STREAM_END",
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"NEED_DICT",
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"ERRNO",
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"STREAM_ERROR",
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"DATA_ERROR",
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"MEM_ERROR",
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"BUF_ERROR",
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"VERSION_ERROR",
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};
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return CODES[code + MIN_CODE];
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}
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size_t
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util::zlib::uncompress (uint8_t *dst, size_t dst_len,
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const uint8_t *src, size_t src_len) {
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size_t actual_len = dst_len;
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uLongf zlib_actual = actual_len;
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int err = ::uncompress (dst, &zlib_actual, src, src_len);
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error::try_code (err);
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actual_len = zlib_actual;
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return actual_len;
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}
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void
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util::zlib::error::try_code (int code) {
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if (Z_OK == code)
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return;
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throw_code(code);
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}
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util::zlib::error::error (const std::string &_what):
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runtime_error (_what)
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{ ; }
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void
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util::zlib::error::throw_code (int code) {
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CHECK_NEQ (code, Z_OK);
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switch (code) {
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#define do_code(c) case c: throw code_error<c> ();
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do_code(Z_STREAM_ERROR);
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do_code(Z_DATA_ERROR);
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do_code(Z_MEM_ERROR);
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do_code(Z_BUF_ERROR);
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do_code(Z_VERSION_ERROR);
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default:
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panic ("Unknown code");
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}
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}
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template class util::zlib::code_error<Z_STREAM_ERROR>;
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template class util::zlib::code_error<Z_DATA_ERROR>;
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template class util::zlib::code_error<Z_MEM_ERROR>;
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template class util::zlib::code_error<Z_BUF_ERROR>;
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template class util::zlib::code_error<Z_VERSION_ERROR>;
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