Read shader from file without stdlib

Over at Lighthouse there are some useful tutorials and some example code. One piece of code I've found all over is the "read a shader from a file" code. Unfortunately its not much use for size coders as it uses stdlib. Essentially it allows you to write shaders in a normal text file and load them as a string.So here I've done a conversion using win32 equivalent functions. It doesn't check error codes (wasted bytes) so be careful to pass in the right filename. I'm not sure this is the smallest way, its just a translation of Lighthouse code.

Essentially adding this code to your intro allows you to develop the shader without constant recompiles.

#include "windows.h"

 char *textFileRead(char *fn) {

 char *content=NULL;
 DWORD dummy;

 HANDLE fp = CreateFile (fn, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 DWORD count=SetFilePointer (fp, 0 ,NULL, FILE_END);
 SetFilePointer (fp, 0 ,NULL, FILE_BEGIN);
 content = (char *)GlobalAlloc(0,(SIZE_T)(count+1));
 ReadFile(fp, (LPVOID)content, count, &dummy, NULL);
 content[count] = '\0';
 CloseHandle(fp);
 return content;
}