X-Git-Url: https://git.saurik.com/apple/system_cmds.git/blobdiff_plain/1a7e3f61d38d679bba59130891c2031b5a0092b6..bd6521f0fc816ab056bc71376f9706a69b3b52c1:/CPPUtil/UtilString.hpp

diff --git a/CPPUtil/UtilString.hpp b/CPPUtil/UtilString.hpp
new file mode 100644
index 0000000..8580163
--- /dev/null
+++ b/CPPUtil/UtilString.hpp
@@ -0,0 +1,41 @@
+//
+//  UtilString.hpp
+//  CPPUtil
+//
+//  Created by James McIlree on 4/16/13.
+//  Copyright (c) 2013 Apple. All rights reserved.
+//
+
+#ifndef CPPUtil_UtilString_hpp
+#define CPPUtil_UtilString_hpp
+
+struct ConstCharHash {
+	//
+	// Okay, by design std::hash<char*> hashes on the pointer,
+	// not the contents of that pointer.
+	//
+	// The C++11 std::hash<std::string> hash works, but must
+	// construct a copy of the passed in string to hash.
+	//
+	// That's 3x slower than this, minimum.
+	//
+	// This is just the __gnu_cxx hash code inlined.
+	//
+	std::size_t operator()(const char* __s) const {
+		unsigned long __h = 0;
+		for ( ; *__s; ++__s)
+			__h = 5 * __h + *__s;
+		return size_t(__h);
+	};
+
+};
+
+struct ConstCharEqualTo {
+	bool operator() (const char* s1, const char* s2) const {
+		return strcmp(s1, s2) == 0;
+	}
+};
+
+bool ends_with(std::string& str, std::string postfix);
+
+#endif