Squashed 'third_party/flatbuffers/' content from commit acc9990ab
Change-Id: I48550d40d78fea996ebe74e9723a5d1f910de491
git-subtree-dir: third_party/flatbuffers
git-subtree-split: acc9990abd2206491480291b0f85f925110102ea
diff --git a/src/flathash.cpp b/src/flathash.cpp
new file mode 100644
index 0000000..bc3d2df
--- /dev/null
+++ b/src/flathash.cpp
@@ -0,0 +1,114 @@
+/*
+ * 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 <stdio.h>
+#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...\n", name);
+ printf("Available hashing algorithms:\n");
+ printf(" 16 bit:\n");
+ size_t size = sizeof(flatbuffers::kHashFunctions16) /
+ sizeof(flatbuffers::kHashFunctions16[0]);
+ for (size_t i = 0; i < size; ++i) {
+ printf(" * %s\n", flatbuffers::kHashFunctions16[i].name);
+ }
+ printf(" 32 bit:\n");
+ 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 1;
+ }
+
+ const char *hash_algorithm = argv[1];
+
+ flatbuffers::NamedHashFunction<uint16_t>::HashFunction hash_function16 =
+ flatbuffers::FindHashFunction16(hash_algorithm);
+ flatbuffers::NamedHashFunction<uint32_t>::HashFunction hash_function32 =
+ flatbuffers::FindHashFunction32(hash_algorithm);
+ flatbuffers::NamedHashFunction<uint64_t>::HashFunction hash_function64 =
+ flatbuffers::FindHashFunction64(hash_algorithm);
+
+ if (!hash_function16 && !hash_function32 && !hash_function64) {
+ printf("\"%s\" is not a known hash algorithm.\n", hash_algorithm);
+ return 1;
+ }
+
+ 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_function16)
+ ss << hash_function16(arg);
+ else 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;
+}