C++ char buffer pointer error

Question

I'm using a function that reads a spooled file and sets a buffer with the output. The function returns OK state and sets readBytes correctly. It also notifies that the reading operation has reached the end of the file.

char* splFileContent = new char[3000];
ULONG readBytes;
int z = cwbOBJ_ReadSplF(splFile, splFileContent, 500, &readBytes, 0);
//z value is REACHED END OF FILE or OK if read but didn't reach the end of the file.

The trouble comes when trying to convert the char buffer to string, I'm getting "4Ä" as string value...

I convert the char buffer to string this way:

stringstream s;
s << splFileContent;
string bufferContent = s.str();

What I'm doing wrong?

You can convert to a string using string bufferContent(splFileContent, readBytes) ; — marom
– marom, Commented Aug 3, 2015 at 12:33

Niall · Accepted Answer · 2015-08-03 12:24:48Z

2

It looks like splFileContent is binary content and not printable characters.

The start of the file may contain a BOM of some sort, e.g. unicode indicator. If it is, you should read in the BOM first and then the rest of the file.

Note: unless the file read function here adds a NULL, be sure to append one as well.

answered Aug 3, 2015 at 12:24

Niall

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2 Comments

ProtectedVoid Over a year ago

How can I convert binary chars to ascii? Thanks.

Niall Over a year ago

Generally you transform the byte wide binary to a hexadecimal string two bytes wide (each character would be in the range [0-9A-F]). You could use streams, sprintf functions etc. There are several popular techniques.

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