testing new non-autotools build system

[chaz/yoink] / src / stlplus / persistence / persistent_cstring.cpp

diff --git a/src/stlplus/persistence/persistent_cstring.cpp b/src/stlplus/persistence/persistent_cstring.cpp
new file mode 100644 (file)
index 0000000..a829b9a
--- /dev/null
+++ b/src/stlplus/persistence/persistent_cstring.cpp
@@ -0,0 +1,63 @@
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+//   Author:    Andy Rushton\r
+//   Copyright: (c) Southampton University 1999-2004\r
+//              (c) Andy Rushton           2004-2009\r
+//   License:   BSD License, see ../docs/license.html\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+#include "persistent_cstring.hpp"\r
+#include "persistent_int.hpp"\r
+#include <string.h>\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r
+// Null-terminated char arrays\r
+// Format: address [ size data ]\r
+\r
+void stlplus::dump_cstring(stlplus::dump_context& context, const char* data) throw(stlplus::persistent_dump_failed)\r
+{\r
+  // register the address and get the magic key for it\r
+  std::pair<bool,unsigned> mapping = context.pointer_map(data);\r
+  stlplus::dump_unsigned(context,mapping.second);\r
+  // if the address is null, then that is all that we need to do\r
+  // however, if it is non-null and this is the first sight of the address, dump the contents\r
+  if (data && !mapping.first)\r
+  {\r
+    unsigned size = strlen(data);\r
+    stlplus::dump_unsigned(context,size);\r
+    for (unsigned i = 0; i < size; i++)\r
+      stlplus::dump_char(context,data[i]);\r
+  }\r
+}\r
+\r
+void stlplus::restore_cstring(restore_context& context, char*& data) throw(stlplus::persistent_restore_failed)\r
+{\r
+  // destroy any previous contents\r
+  if (data)\r
+  {\r
+    delete[] data;\r
+    data = 0;\r
+  }\r
+  // get the magic key\r
+  unsigned magic = 0;\r
+  stlplus::restore_unsigned(context,magic);\r
+  // now lookup the magic key to see if this pointer has already been restored\r
+  // null pointers are always flagged as already restored\r
+  std::pair<bool,void*> address = context.pointer_map(magic);\r
+  if (!address.first)\r
+  {\r
+    // this pointer has never been seen before and is non-null\r
+    // restore the string\r
+    unsigned size = 0;\r
+    stlplus::restore_unsigned(context,size);\r
+    data = new char[size+1];\r
+    for (unsigned i = 0; i < size; i++)\r
+      stlplus::restore_char(context,data[i]);\r
+    data[size] = '\0';\r
+    // add this pointer to the set of already seen objects\r
+    context.pointer_add(magic,data);\r
+  }\r
+}\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r