Added StringStream

Author: korslund

stream/servers/string_stream.hpp

@@ -0,0 +1,33 @@
+#ifndef MANGLE_STREAM_STRINGSERVER_H
+#define MANGLE_STREAM_STRINGSERVER_H
+
+#include "memory_stream.hpp"
+
+namespace Mangle {
+namespace Stream {
+
+/** A specialized MemoryStream that takes an std::string as input. A
+    local copy of the string is stored in the instance.
+
+    NOTE on using MemoryStream::clone(): Clones are invalidated once
+    the original StringStream goes out of scope and is deallocated.
+ */
+class StringStream : public MemoryStream
+{
+  const std::string str;
+
+ public:
+  StringStream(const std::string &_str)
+    : str(_str)
+  {
+    // Call this after initializing the class variable str, since we
+    // need the locally allocated pointer.
+    set(str.c_str(), str.length());
+  }
+
+  static MemoryStreamPtr Open(const std::string &str)
+  { return MemoryStreamPtr(new StringStream(str)); }
+};
+
+}} // namespaces
+#endif

stream/tests/Makefile

@@ -1,6 +1,6 @@
 GCC=g++ -I../ -Wall -Werror
 
-all: memory_server_test buffer_filter_test file_server_test slice_filter_test file_write_test iostream_test cap_test buffer_writer_test copy_test
+all: memory_server_test buffer_filter_test file_server_test slice_filter_test file_write_test iostream_test cap_test buffer_writer_test copy_test string_stream_test
 
 # CURRENTLY DISABLED for dependency reasons (the examples should be OK)
 # ogre_client_test audiere_client_test
@@ -27,6 +27,9 @@ file_write_test: file_write_test.cpp ../stream.hpp ../servers/outfile_stream.hpp
 memory_server_test: memory_server_test.cpp ../stream.hpp ../servers/memory_stream.hpp
 	$(GCC) $< -o $@
 
+string_stream_test: string_stream_test.cpp ../stream.hpp ../servers/memory_stream.hpp ../servers/string_stream.hpp
+	$(GCC) $< -o $@
+
 buffer_filter_test: buffer_filter_test.cpp ../stream.hpp ../servers/memory_stream.hpp ../filters/buffer_stream.hpp
 	$(GCC) $< -o $@
 

stream/tests/output/string_stream_test.out

@@ -0,0 +1,23 @@
+Size: 12
+Pos: 0
+Seeking...
+Pos: 3
+Reading: 4
+Four bytes: lo w
+Eof: 0
+Pos: 7
+Seeking again...
+Pos: 12
+Eof: 1
+Seek to 6
+Eof: 0
+Pos: 6
+Over-reading: 6
+Result: world!
+Eof: 1
+Pos: 12
+Finally, reading the entire string: 11
+Result: hello world
+Eof: 0
+Pos: 11
+Entire stream from pointer: hello world!

stream/tests/string_stream_test.cpp

@@ -0,0 +1,42 @@
+#include "../servers/string_stream.hpp"
+
+#include <iostream>
+#include <string.h>
+
+using namespace Mangle::Stream;
+using namespace std;
+
+int main()
+{
+  StreamPtr inp = StringStream::Open("hello world!");
+
+  cout << "Size: " << inp->size() << endl;
+  cout << "Pos: " << inp->tell() << "\nSeeking...\n";
+  inp->seek(3);
+  cout << "Pos: " << inp->tell() << endl;
+  char data[12];
+  memset(data, 0, 12);
+  cout << "Reading: " << inp->read(data, 4) << endl;
+  cout << "Four bytes: " << data << endl;
+  cout << "Eof: " << inp->eof() << endl;
+  cout << "Pos: " << inp->tell() << "\nSeeking again...\n";
+  inp->seek(33);
+  cout << "Pos: " << inp->tell() << endl;
+  cout << "Eof: " << inp->eof() << "\nSeek to 6\n";
+  inp->seek(6);
+  cout << "Eof: " << inp->eof() << endl;
+  cout << "Pos: " << inp->tell() << endl;
+  cout << "Over-reading: " << inp->read(data, 200) << endl;
+  cout << "Result: " << data << endl;
+  cout << "Eof: " << inp->eof() << endl;
+  cout << "Pos: " << inp->tell() << endl;
+  inp->seek(0);
+  cout << "Finally, reading the entire string: " << inp->read(data,11) << endl;
+  cout << "Result: " << data << endl;
+  cout << "Eof: " << inp->eof() << endl;
+  cout << "Pos: " << inp->tell() << endl;
+
+  cout << "Entire stream from pointer: " << (char*)inp->getPtr() << endl;
+  
+  return 0;
+}