feat: use FNV in libSystem's syscall routing.

fix: Add legacy string.h functions back, for GCC.

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

1 files changed, 18 insertions, 4 deletions

diff --git a/dev/libSystem/SystemKit/Syscall.h b/dev/libSystem/SystemKit/Syscall.h
index 436665ae..5a840df1 100644
--- a/dev/libSystem/SystemKit/Syscall.h
+++ b/dev/libSystem/SystemKit/Syscall.h
@@ -9,11 +9,25 @@
 #include <libSystem/SystemKit/System.h>
 #include <cstdarg>
 
-#ifndef SYSCALL_HASH
-#define SYSCALL_HASH(str) (UInt64) str
-#endif  // !SYSCALL_HASH
-
 IMPORT_C VoidPtr libsys_syscall_arg_1(SizeT id);
 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) {
+  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;
+}
+
+#ifndef SYSCALL_HASH
+#define SYSCALL_HASH(str) libsys_hash_64(str)
+#endif  // !SYSCALL_HASH
\ No newline at end of file