anonymous_namespace{my_fopen.cc} Namespace Reference

Functions
void	make_ftype (char *to, int flag)
	Make a fopen() typestring from a open() type bitmap. More...

Variables
constexpr FILE *	nullstream = nullptr

Function Documentation

make_ftype()

void anonymous_namespace{my_fopen.cc}::make_ftype	(	char *	to,
		int	flag
	)

Make a fopen() typestring from a open() type bitmap.

This routine attempts to find the best possible match between a numeric option and a string option that could be fed to fopen. There is not a 1 to 1 mapping between the two.

MAPPING r == O_RDONLY w == O_WRONLY|O_TRUNC|O_CREAT a == O_WRONLY|O_APPEND|O_CREAT r+ == O_RDWR w+ == O_RDWR|O_TRUNC|O_CREAT a+ == O_RDWR|O_APPEND|O_CREAT

Parameters

to	String for fopen() is stored here
flag	Flag used by open()

Note

On Unix, O_RDONLY is usually 0

Variable Documentation

nullstream

constexpr FILE* anonymous_namespace{my_fopen.cc}::nullstream = nullptr

constexpr