TinyXML: Save document to char * or string

问题

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.

回答1:

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 without using a file. See TinyXML documentation (look for the "Printing" section)

回答2:

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();

回答3:

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();

回答4:

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.

来源：https://stackoverflow.com/questions/110393/tinyxml-save-document-to-char-or-string

标签

c++

tinyxml