feat: libSystem: `libsys_hash_64` is now defined in `src/System.cc`

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

2 files changed, 19 insertions, 16 deletions

diff --git a/dev/libSystem/SystemKit/Syscall.h b/dev/libSystem/SystemKit/Syscall.h
index a1505b46..35bfc6f8 100644
--- a/dev/libSystem/SystemKit/Syscall.h
+++ b/dev/libSystem/SystemKit/Syscall.h
@@ -14,22 +14,8 @@ IMPORT_C VoidPtr libsys_syscall_arg_2(SizeT id, VoidPtr arg1);
 IMPORT_C VoidPtr libsys_syscall_arg_3(SizeT id, VoidPtr arg1, VoidPtr arg3);
 IMPORT_C VoidPtr libsys_syscall_arg_4(SizeT id, VoidPtr arg1, VoidPtr arg3, VoidPtr arg4);
 
-inline UInt64 libsys_hash_64(const Char* path) {
-  if (!path || *path == 0) return 0;
-
-  const UInt64 FNV_OFFSET_BASIS = 0xcbf29ce484222325ULL;
-  const UInt64 FNV_PRIME        = 0x100000001b3ULL;
-
-  UInt64 hash = FNV_OFFSET_BASIS;
-
-  while (*path) {
-    hash ^= (Char) (*path++);
-    hash *= FNV_PRIME;
-  }
-
-  return hash;
-}
+IMPORT_C UInt64 libsys_hash_64(const Char* path);
 
 #ifndef SYSCALL_HASH
 #define SYSCALL_HASH(str) libsys_hash_64(str)
-#endif  // !SYSCALL_HASH
\ No newline at end of file
+#endif  // !SYSCALL_HASH
diff --git a/dev/libSystem/src/System.cc b/dev/libSystem/src/System.cc
index 3870ff18..ba848a18 100644
--- a/dev/libSystem/src/System.cc
+++ b/dev/libSystem/src/System.cc
@@ -23,6 +23,23 @@ IMPORT_C Void _rtl_assert(Bool expr, const Char* origin) {
   }

 }

 

+/// @note this uses the FNV 64-bit variant.

+IMPORT_C UInt64 libsys_hash_64(const Char* path) {

+  if (!path || *path == 0) return 0;

+

+  const UInt64 kFNVSeed  = 0xcbf29ce484222325ULL;

+  const UInt64 kFNVPrime = 0x100000001b3ULL;

+

+  UInt64 hash = kFNVSeed;

+

+  while (*path) {

+    hash ^= (Char) (*path++);

+    hash *= kFNVPrime;

+  }

+

+  return hash;

+}

+

 // memmove-style copy

 IMPORT_C VoidPtr MmCopyMemory(_Input VoidPtr dest, _Input VoidPtr src, _Input SizeT len) {

   // handles overlap, prefers 64-bit word copies when aligned