diff options
| author | boris <wzn@moneybot.cc> | 2018-11-28 16:00:02 +1300 |
|---|---|---|
| committer | boris <wzn@moneybot.cc> | 2018-11-28 16:00:02 +1300 |
| commit | 3d412a4b30a9f7c7f51ea6562e694315948bd3da (patch) | |
| tree | 26d67dfd1f3e5fd12903ad13e85d0cb8bcf8f21c /cheat/gmod/fnv.hpp | |
| parent | e4729e4393d90271a3814c7a79950a660c48325a (diff) | |
cleaned up
in short, the cheat and loader are now separate solutions. unused stuff was moved into the legacy solution in case anyone wants to compile it or whatever.
i can change this back if you want to. also, i configured the loader to compile in x64, and have separate build types for linux and win64
Diffstat (limited to 'cheat/gmod/fnv.hpp')
| -rw-r--r-- | cheat/gmod/fnv.hpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/cheat/gmod/fnv.hpp b/cheat/gmod/fnv.hpp new file mode 100644 index 0000000..a3f2dc9 --- /dev/null +++ b/cheat/gmod/fnv.hpp @@ -0,0 +1,64 @@ +#pragma once
+
+#pragma warning( disable : 4307 ) // '*': integral constant overflow
+#pragma warning( disable : 4244 ) // possible loss of data
+
+#include <cstdint>
+#include <string>
+
+using hash_t = unsigned int;
+
+// used for compile-time FNV-1a 32bit hashes.
+#define fnv( str ) \
+ [&]() { \
+ constexpr hash_t out = hash::fnv1a( str ); \
+ \
+ return out; \
+ }()
+
+// used for compile-time FNV-1a 32bit hashes when above macro cant be used for constexpr variables.
+#define fnv_const( str ) Hash::fnv1a_32( str )
+
+namespace hash // FNV-1a ( Fowler-Noll-Vo hash ).
+{
+ // FNV-1a constants.
+ enum : hash_t {
+ FNV1A_PRIME = 0x1000193,
+ FNV1A_BASIS = 0x811C9DC5
+ };
+
+ // compile-time strlen.
+ __forceinline constexpr size_t ct_strlen( const char *str ) {
+ size_t out = 1;
+
+ for( ; str[ out ] != '\0'; ++out );
+
+ return out;
+ }
+
+ // hash data.
+ __forceinline constexpr hash_t fnv1a( const uint8_t *data, const size_t len ) {
+ hash_t out = FNV1A_BASIS;
+
+ for( size_t i = 0; i < len; ++i )
+ out = ( out ^ data[ i ] ) * FNV1A_PRIME;
+
+ return out;
+ }
+
+ // hash c-style string.
+ __forceinline constexpr hash_t fnv1a( const char *str ) {
+ hash_t out = FNV1A_BASIS;
+ size_t len = ct_strlen( str );
+
+ for( size_t i = 0; i < len; ++i )
+ out = ( out ^ str[ i ] ) * FNV1A_PRIME;
+
+ return out;
+ }
+
+ // hash C++-style string ( runtime only ).
+ __forceinline hash_t fnv1a( const std::string &str ) {
+ return fnv1a( ( uint8_t* )str.c_str( ), str.length( ) );
+ }
+}
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