python 2.7 -> python 3.14

extern/include/python/internal/pycore_pyhash.h

@@ -0,0 +1,91 @@
+#ifndef Py_INTERNAL_PYHASH_H
+#define Py_INTERNAL_PYHASH_H
+
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
+// Similar to Py_HashPointer(), but don't replace -1 with -2.
+static inline Py_hash_t
+_Py_HashPointerRaw(const void *ptr)
+{
+    uintptr_t x = (uintptr_t)ptr;
+    Py_BUILD_ASSERT(sizeof(x) == sizeof(ptr));
+
+    // Bottom 3 or 4 bits are likely to be 0; rotate x by 4 to the right
+    // to avoid excessive hash collisions for dicts and sets.
+    x = (x >> 4) | (x << (8 * sizeof(uintptr_t) - 4));
+
+    Py_BUILD_ASSERT(sizeof(x) == sizeof(Py_hash_t));
+    return (Py_hash_t)x;
+}
+
+/* Hash secret
+ *
+ * memory layout on 64 bit systems
+ *   cccccccc cccccccc cccccccc  uc -- unsigned char[24]
+ *   pppppppp ssssssss ........  fnv -- two Py_hash_t
+ *   k0k0k0k0 k1k1k1k1 ........  siphash -- two uint64_t
+ *   ........ ........ ssssssss  djbx33a -- 16 bytes padding + one Py_hash_t
+ *   ........ ........ eeeeeeee  pyexpat XML hash salt
+ *
+ * memory layout on 32 bit systems
+ *   cccccccc cccccccc cccccccc  uc
+ *   ppppssss ........ ........  fnv -- two Py_hash_t
+ *   k0k0k0k0 k1k1k1k1 ........  siphash -- two uint64_t (*)
+ *   ........ ........ ssss....  djbx33a -- 16 bytes padding + one Py_hash_t
+ *   ........ ........ eeee....  pyexpat XML hash salt
+ *
+ * (*) The siphash member may not be available on 32 bit platforms without
+ *     an unsigned int64 data type.
+ */
+typedef union {
+    /* ensure 24 bytes */
+    unsigned char uc[24];
+    /* two Py_hash_t for FNV */
+    struct {
+        Py_hash_t prefix;
+        Py_hash_t suffix;
+    } fnv;
+    /* two uint64 for SipHash24 */
+    struct {
+        uint64_t k0;
+        uint64_t k1;
+    } siphash;
+    /* a different (!) Py_hash_t for small string optimization */
+    struct {
+        unsigned char padding[16];
+        Py_hash_t suffix;
+    } djbx33a;
+    struct {
+        unsigned char padding[16];
+        Py_hash_t hashsalt;
+    } expat;
+} _Py_HashSecret_t;
+
+// Export for '_elementtree' shared extension
+PyAPI_DATA(_Py_HashSecret_t) _Py_HashSecret;
+
+#ifdef Py_DEBUG
+extern int _Py_HashSecret_Initialized;
+#endif
+
+
+#ifndef MS_WINDOWS
+# define _py_urandom_cache_INIT \
+    { \
+        .fd = -1, \
+    }
+#else
+# define _py_urandom_cache_INIT {0}
+#endif
+
+#define pyhash_state_INIT \
+    { \
+        .urandom_cache = _py_urandom_cache_INIT, \
+    }
+
+
+extern uint64_t _Py_KeyedHash(uint64_t key, const void *src, Py_ssize_t src_sz);
+
+#endif  // !Py_INTERNAL_PYHASH_H