fopenf.c File Reference

#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>

Include dependency graph for fopenf.c:

Functions
FILE *	vfopenf (const char *mode, const char *fmt, va_list ap)
	Similar to fopenf() except it takes a va_list argument. More...
FILE *	fopenf (const char *mode, const char *fmt,...)
	Open a file based on the formatted string and optional arguments. More...

Detailed Description

Author

Joachim Wiberg

Date

2021

Copyright

ISC License

Function Documentation

fopenf()

FILE* fopenf	(	const char *	mode,
		const char *	fmt,
			...
	)

Open a file based on the formatted string and optional arguments.

Parameters

mode	An fopen() mode string, e.g. "w+".
fmt	Formatted string to be composed into a pathname.

This function is an extension to the fopen() family, lessening the burden of first having to compose the filename from parts in a seprate buffer.

Returns

Upon successful completion, fopenf() returns a FILE pointer. Otherwise, NULL is returned and errno is set to indicate the error.

vfopenf()

FILE* vfopenf	(	const char *	mode,
		const char *	fmt,
		va_list	ap
	)

Similar to fopenf() except it takes a va_list argument.

Parameters

mode	An fopen() mode string, e.g. "w+".
fmt	Formatted string to be composed into a pathname.
ap	List of variable arguemnts from va_start().

See fopenf() for details.

Returns

a FILE pointer, or NULL on error.