Spooky hash, smarter animqueue diffs

luprex/core/cpp/streambuffer.cpp

@@ -1,4 +1,5 @@
 #include "streambuffer.hpp"
+#include "spookyv2.hpp"
 #include <cassert>
 #include <cstring>
 
@@ -151,6 +152,12 @@ void StreamBuffer::write_double(double d) {
     write_cursor_ += 8;
 }
 
+void StreamBuffer::write_hashvalue(const util::HashValue &hv) {
+    make_space(16);
+    memcpy(write_cursor_, &hv, 16);
+    write_cursor_ += 16;
+}
+
 void StreamBuffer::write_bytes(const char *s, int64_t len) {
     make_space(len);
     memcpy(write_cursor_, s, len);
@@ -224,6 +231,14 @@ int64_t StreamBuffer::read_int64() {
     return v;
 }
 
+util::HashValue StreamBuffer::read_hashvalue() {
+    check_available(16);
+    util::HashValue hv;
+    memcpy(&hv, read_cursor_, 16);
+    read_cursor_ += 16;
+    return hv;
+}
+
 float StreamBuffer::read_float() {
     check_available(4);
     float f;
@@ -296,6 +311,13 @@ void StreamBuffer::unwrite_to(int64_t wr_count) {
     write_cursor_ = buf_lo_ + (wr_count - pre_read_count_);
 }
 
+util::HashValue StreamBuffer::hash() const {
+    uint64_t hash1 = 0x82A7912E7893AC87;
+    uint64_t hash2 = 0x81D402740DE458F3;
+    SpookyHash::Hash128(read_cursor_, write_cursor_ - read_cursor_, &hash1, &hash2);
+    return std::make_pair(hash1, hash2);
+}
+
 int StreamBuffer::lua_writer(lua_State *L, const void* p, size_t sz, void* ud) {
     StreamBuffer *sb = (StreamBuffer *)ud;
     sb->write_bytes((const char *)p, sz);