novidia: add shader.farc xdelta/vcdiff patching

2020-11-10 05:00:18 +11:00
parent fd78178ddb
commit dd04e1ca1e
98 changed files with 45837 additions and 2 deletions
@@ -0,0 +1,87 @@
+/* xdelta3 - delta compression tools and library -*- Mode: C++ -*-
+   Copyright 2016 Joshua MacDonald
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+class Delta {
+public:
+  Delta(const Block &block) {
+    int ret;
+    xd3_config config;
+    memset(&stream_, 0, sizeof (stream_));
+    memset(&config, 0, sizeof (config));
+
+    xd3_init_config(&config, XD3_SKIP_EMIT | XD3_ADLER32_NOVER);
+
+    CHECK_EQ(0, xd3_config_stream (&stream_, &config));
+
+    xd3_avail_input (&stream_, block.Data(), block.Size());
+
+    bool done = false;
+    while (!done) {
+      ret = xd3_decode_input(&stream_);
+    
+      switch (ret) {
+      case XD3_INPUT:
+	done = true;
+	break;
+      case XD3_OUTPUT:
+	CHECK_EQ(0, xd3_whole_append_window (&stream_));
+	break;
+      case XD3_GOTHEADER:
+      case XD3_WINSTART:
+      case XD3_WINFINISH:
+	break;
+      default:
+	cerr << "decode: " << done;
+	abort();
+      }
+    }
+  }
+
+  ~Delta() {
+    xd3_free_stream(&stream_);
+  }
+
+  xoff_t AddedBytes() const {
+    return stream_.whole_target.addslen;
+  }
+
+  xoff_t Windows() const {
+    return stream_.whole_target.wininfolen;
+  }
+
+// Note: This does not benefit from -Wformat= checking, due to the
+// enclosing template. Further, it was not used.
+// void Print() const {
+//     for (size_t i = 0; i < stream_.whole_target.instlen; i++) {
+//       xd3_winst &winst = stream_.whole_target.inst[i];
+//       switch (winst.type) {
+//       case XD3_RUN: 
+// 	DP(RINT, "%" Q "u run %" W "u\n", winst.position, winst.size);
+// 	break;
+//       case XD3_ADD: 
+// 	DP(RINT "%" Q "u add %" W "u\n", winst.position, winst.size);
+// 	break;
+//       default:
+// 	DP(RINT "%" Q "u copy %" W "u @ %" Q "u (mode %u)\n", 
+// 	   winst.position, winst.size, winst.addr, winst.mode);
+// 	break;
+//       }
+//     }
+//   }
+
+private:
+  xd3_stream stream_;
+};