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102 lines (91 loc) · 3.22 KB
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/*
* Copyright 2015 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <iostream>
#include <sstream>
#include <string>
#include "flatbuffers/hash.h"
enum OutputFormat {
kDecimal,
kHexadecimal,
kHexadecimal0x,
};
int main(int argc, char* argv[]) {
const char* name = argv[0];
if (argc <= 1) {
printf("%s HASH [OPTION]... STRING... [-- STRING...]\n", name);
printf("Available hashing algorithms:\n 32 bit:\n");
size_t size = sizeof(flatbuffers::kHashFunctions32) /
sizeof(flatbuffers::kHashFunctions32[0]);
for (size_t i = 0; i < size; ++i) {
printf(" * %s\n", flatbuffers::kHashFunctions32[i].name);
}
printf(" 64 bit:\n");
size = sizeof(flatbuffers::kHashFunctions64) /
sizeof(flatbuffers::kHashFunctions64[0]);
for (size_t i = 0; i < size; ++i) {
printf(" * %s\n", flatbuffers::kHashFunctions64[i].name);
}
printf(
" -d Output hash in decimal.\n"
" -x Output hash in hexadecimal.\n"
" -0x Output hash in hexadecimal and prefix with 0x.\n"
" -c Append the string to the output in a c-style comment.\n");
return 0;
}
const char* hash_algorithm = argv[1];
flatbuffers::NamedHashFunction<uint32_t>::HashFunction hash_function32 =
flatbuffers::FindHashFunction32(hash_algorithm);
flatbuffers::NamedHashFunction<uint64_t>::HashFunction hash_function64 =
flatbuffers::FindHashFunction64(hash_algorithm);
if (!hash_function32 && !hash_function64) {
printf("\"%s\" is not a known hash algorithm.\n", hash_algorithm);
return 0;
}
OutputFormat output_format = kHexadecimal;
bool annotate = false;
bool escape_dash = false;
for (int i = 2; i < argc; i++) {
const char* arg = argv[i];
if (!escape_dash && arg[0] == '-') {
std::string opt = arg;
if (opt == "-d") output_format = kDecimal;
else if (opt == "-x") output_format = kHexadecimal;
else if (opt == "-0x") output_format = kHexadecimal0x;
else if (opt == "-c") annotate = true;
else if (opt == "--") escape_dash = true;
else printf("Unrecognized argument: \"%s\"\n", arg);
} else {
std::stringstream ss;
if (output_format == kDecimal) {
ss << std::dec;
} else if (output_format == kHexadecimal) {
ss << std::hex;
} else if (output_format == kHexadecimal0x) {
ss << std::hex;
ss << "0x";
}
if (hash_function32)
ss << hash_function32(arg);
else if (hash_function64)
ss << hash_function64(arg);
if (annotate)
ss << " /* \"" << arg << "\" */";
ss << "\n";
std::cout << ss.str();
}
}
return 0;
}