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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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 <stdlib.h>
#include <string.h>
#include <grpc/compression.h>
int grpc_compression_algorithm_parse(const char* name, size_t name_length,
grpc_compression_algorithm *algorithm) {
/* we use strncmp not only because it's safer (even though in this case it
* doesn't matter, given that we are comparing against string literals, but
* because this way we needn't have "name" nil-terminated (useful for slice
* data, for example) */
if (name_length == 0) {
return 0;
}
if (strncmp(name, "none", name_length) == 0) {
*algorithm = GRPC_COMPRESS_NONE;
} else if (strncmp(name, "gzip", name_length) == 0) {
*algorithm = GRPC_COMPRESS_GZIP;
} else if (strncmp(name, "deflate", name_length) == 0) {
*algorithm = GRPC_COMPRESS_DEFLATE;
} else {
return 0;
}
return 1;
}
int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
char **name) {
switch (algorithm) {
case GRPC_COMPRESS_NONE:
*name = "none";
break;
case GRPC_COMPRESS_DEFLATE:
*name = "deflate";
break;
case GRPC_COMPRESS_GZIP:
*name = "gzip";
break;
default:
return 0;
}
return 1;
}
/* TODO(dgq): Add the ability to specify parameters to the individual
* compression algorithms */
grpc_compression_algorithm grpc_compression_algorithm_for_level(
grpc_compression_level level) {
switch (level) {
case GRPC_COMPRESS_LEVEL_NONE:
return GRPC_COMPRESS_NONE;
case GRPC_COMPRESS_LEVEL_LOW:
case GRPC_COMPRESS_LEVEL_MED:
case GRPC_COMPRESS_LEVEL_HIGH:
return GRPC_COMPRESS_DEFLATE;
default:
/* we shouldn't be making it here */
abort();
}
}
grpc_compression_level grpc_compression_level_for_algorithm(
grpc_compression_algorithm algorithm) {
grpc_compression_level clevel;
for (clevel = GRPC_COMPRESS_LEVEL_NONE; clevel < GRPC_COMPRESS_LEVEL_COUNT;
++clevel) {
if (grpc_compression_algorithm_for_level(clevel) == algorithm) {
return clevel;
}
}
abort();
}
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