Want to read a whole file as utf-8

[FG via Digitalmars-d-learn]

On 2015-02-04 at 01:56, Namespace wrote:
>
>      FILE* f = fopen(filename.ptr, "rb");
>      fseek(f, 0, SEEK_END);
>      immutable size_t fsize = ftell(f);
>      fseek(f, 0, SEEK_SET);
>

That's quite a smart way to get the size of the file.

I started with std.file.getSize (which obviously isn't marked as @nogc) and ended up with the monstrosity below (which I have only compiled on Windows), so I decided not to mention it in my previous post. Wouldn't be the point anyway, since I have only shown an example with a single-fill fixed buffer. But here it is, rendered useless by your code:

     long getFileSize(const char* cName) @nogc
     {
         version(Windows)
         {
             import core.sys.windows.windows;
             WIN32_FILE_ATTRIBUTE_DATA fad;
             if (!GetFileAttributesExA(cName, GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, &fad))
                 return -1;
             ULARGE_INTEGER li;
             li.LowPart = fad.nFileSizeLow;
             li.HighPart = fad.nFileSizeHigh;
             return li.QuadPart;
         }
         else version(Posix)
         {
             import core.sys.posix.sys.stat;
             stat_t statbuf = void;
             if (stat(cName, &statbuf))
                 return -1;
             return statbuf.st_size;
         }
     }