summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp')
-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp84
1 files changed, 84 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp
new file mode 100644
index 00000000000..828ed5ac1e0
--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.cpp
@@ -0,0 +1,84 @@
+/*************************************************************************
+** HashFunction.cpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2018 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include <algorithm>
+#include <iomanip>
+#include <sstream>
+#include "HashFunction.hpp"
+#include "utility.hpp"
+#include "MD5HashFunction.hpp"
+#include "XXHashFunction.hpp"
+
+using namespace std;
+
+
+/** Returns a vector containing the names of the currently supported hash algorithms. */
+vector<string> HashFunction::supportedAlgorithms () {
+ return vector<string> {"md5", "xxh32", "xxh64"};
+}
+
+
+/** Returns true if 'algo' is the name of a supported hash algorithm. */
+bool HashFunction::isSupportedAlgorithm (const std::string &algo) {
+ auto algos = supportedAlgorithms();
+ return find(algos.begin(), algos.end(), algo) != algos.end();
+}
+
+
+/** Creates a hash function for a given algorithm name/identifier.
+ * The following names are currently supported: md5, xxh32, xxh64. */
+unique_ptr<HashFunction> HashFunction::create (const string &name) {
+ string lowerName = util::tolower(name);
+ if (lowerName == "md5")
+ return util::make_unique<MD5HashFunction>();
+ if (lowerName == "xxh32")
+ return util::make_unique<XXH32HashFunction>();
+ if (lowerName == "xxh64")
+ return util::make_unique<XXH64HashFunction>();
+ return nullptr;
+}
+
+
+std::unique_ptr<HashFunction> HashFunction::create (const string &name, const char *data, size_t length) {
+ auto hashfunc = create(name);
+ if (hashfunc)
+ hashfunc->update(data, length);
+ return hashfunc;
+}
+
+
+std::unique_ptr<HashFunction> HashFunction::create (const string &name, const string &data) {
+ return create(name, data.data(), data.length());
+}
+
+
+std::unique_ptr<HashFunction> HashFunction::create (const string &name, const vector<uint8_t> &data) {
+ return create(name, reinterpret_cast<const char*>(data.data()), data.size());
+}
+
+
+/** Returns the current digest as hexadecimal value. */
+string HashFunction::digestString () const {
+ ostringstream oss;
+ oss << hex << setfill('0');
+ for (int byte : digestValue())
+ oss << setw(2) << byte;
+ return oss.str();
+}