TinyXML: Save document to char * or string

Question

I'm attempting to use TinyXML to read and save from memory, instead of only reading and saving files to disk.

It seems that the documnent's parse function can load a char *. But then I need to save the document to a char * when I'm done with it. Does anyone know about this?

Edit: The printing & streaming functions aren't what I'm looking for. They output in a viewable format, I need the actual xml content.

Edit: Printing is cool.

Answer 1

Don't quite get what you are saying; your question is not clear. I'm guessing you are wanting to load a file into memory so that you can pass it to the document parse function. In that case, the following code should work.

#include <stdio.h>

The following code reads a file into memory and stores it in a buffer

FILE* fd = fopen("filename.xml", "rb"); // Read-only mode
int fsize = fseek(fd, 0, SEEK_END); // Get file size
rewind(fd);
char* buffer = (char*)calloc(fsize + 1, sizeof(char));
fread(buffer, fsize, 1, fd);
fclose(fd);

The file is now in the variable "buffer" and can be passed to whatever function required you to provide a char* buffer of the file to it.

Answer 2

I'm not familiar with TinyXML, but from the documentation it seems that by using operator << to a C++ stream (so you can use C++ string streams) or a TiXMLPrinter class you can get an STL string with the without using a file. See TinyXML documentation (look for the "Printing" section)

Answer 3

TinyXML by the moment does not implements read/write STREAM operations, only can work with files

in the documentation (where are detailed info about loadfile method) you can read "stream operations will be implemented in the future..."

I have decided to use temporaly file for work with tinyXML but for sure there are easy trick to work with stream "hack" that tinyxml see as file

regards

Answer 4

A simple and elegant solution in TinyXml for printing a TiXmlDocument to a std::string.

I have made this little example

// Create a TiXmlDocument
TiXmlDocument *pDoc =new TiXmlDocument("my_doc_name");

// Add some content to the document, you might fill in something else ;-)
TiXmlComment* comment = new TiXmlComment("hello world" );
pDoc->LinkEndChild( comment );

// Declare a printer
TiXmlPrinter printer;

// attach it to the document you want to convert in to a std::string
pDoc->Accept(&printer);

// Create a std::string and copy your document data in to the string
std::string str = printer.CStr();

Answer 5

Here's some sample code I am using, adapted from the TiXMLPrinter documentation:

TiXmlDocument doc;
// populate document here ...

TiXmlPrinter printer;
printer.SetIndent( "    " );

doc.Accept( &printer );
std::string xmltext = printer.CStr();