Initial

parts/main.cpp

@@ -0,0 +1,116 @@
+#include <common/windows.hpp>
+#include <common/array.hpp>
+#include <common/string.hpp>
+#include <common/winsvc.hpp>
+#include <common/file.hpp>
+
+#define MAX_BYTES 64000000
+#define BUF_SIZE 1024000 
+
+void combine();
+void divide(const String &pathFileName);
+
+void main(int argc,char ** argv)
+{
+  String command;
+
+  if(argc<2)
+	{
+	  ::printf("USAGE parts {divide[filename]|combine} {filename} ** if combine then filename \n");
+	  return;
+	}
+	command=argv[1];
+
+	if(command=="divide")
+	{
+	  if(argc!=3)
+		{
+	    ::printf("USAGE parts {divide[filename]|combine} {filename} ** if combine then filename \n");
+	    return;
+		}
+	  divide(argv[2]);
+	}
+	else if(command=="combine")combine();
+	else ::printf("unknown command\n");
+}
+
+void combine()
+{
+  Array<BYTE> bytes;
+	File inFile;
+	File outFile;
+	DWORD part=0;
+	DWORD readCount=0;
+	String strPathFileName;
+
+  if(!outFile.open("result.dat","wb"))
+	{
+    ::printf("unable to open output 'result.dat'\n");
+		return;
+	}
+  bytes.size(BUF_SIZE);
+	while(true)
+	{
+	  ::sprintf(strPathFileName,"part_%d.dat",part);
+	  if(!inFile.open(strPathFileName,"rb"))
+		{
+		  ::printf("unable to open %s\n",strPathFileName.str());
+			return;
+		}
+		::printf("Reading %s\n",strPathFileName.str());
+		while(0!=(readCount=inFile.read((char*)&bytes[0],bytes.size())))
+		  outFile.write((char*)&bytes[0],readCount);
+		inFile.close();
+		part++;
+	}
+}
+
+void divide(const String &strPathInput)
+{
+  Array<BYTE> bytes;
+	DWORD part=0;
+	DWORD count=0;
+	DWORD byteCount=0;
+	DWORD totalCount=0;
+	String strPathFileName;
+	File inFile;
+	File outFile;
+
+  bytes.size(BUF_SIZE);
+	if(!inFile.open(strPathInput,"rb"))
+	{
+	  ::printf("Cannot open input\n");
+	  return;
+	}
+	::sprintf(strPathFileName,"part_%d.dat",part);
+	if(!outFile.open(strPathFileName,"wb"))
+	{
+	  ::printf("cannot open output '%s'\n",strPathFileName.str());
+	  return;
+	}
+	while(true)
+	{
+	  if(count>MAX_BYTES)
+ 	  {
+		  outFile.close();
+			part++;
+	    ::sprintf(strPathFileName,"writing 'part_%d.dat'",part);
+	    if(!outFile.open(strPathFileName,"wb"))
+			{
+	      ::printf("cannot open output '%s'\n",strPathFileName.str());
+			  return;
+			}
+			count=0;
+	  }
+    byteCount=inFile.read((char*)&bytes[0],bytes.size());
+		if(!byteCount)break;
+		if(!outFile.write(&bytes[0],byteCount))
+		{
+		  ::printf("Unable to write to '%s'\n",strPathFileName.str());
+			return;
+		}
+		count+=byteCount;
+		totalCount+=byteCount;
+//		if(!(totalCount%BUF_SIZE))::printf("Wrote %d bytes to %s\n",totalCount,strPathFileName.str());
+	}
+}