asprintf.c File Reference

#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER)
int	vasprintf (char **strp, const char *fmt, va_list args)
	Write a formatted string to newly allocated memory.
int	asprintf (char **strp, const char *fmt,...)
	Write a formatted string to newly allocated memory.

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

int vasprintf	(	char **	strp,
		const char *	fmt,
		va_list	args
	)

Write a formatted string to newly allocated memory.

Parameters:

	strp	Pointer to hold allocated string
	fmt	Format string
	args	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Definition at line 17 of file asprintf.c.

References ENOMEM, malloc(), NULL, va_copy, va_end, and vsnprintf().

Referenced by asprintf().

                                                             {
        size_t len;
        va_list args_tmp;

        /* Calculate length needed for string */
        va_copy ( args_tmp, args );
        len = ( vsnprintf ( NULL, 0, fmt, args_tmp ) + 1 );
        va_end ( args_tmp );

        /* Allocate and fill string */
        *strp = malloc ( len );
        if ( ! *strp )
                return -ENOMEM;
        return vsnprintf ( *strp, len, fmt, args );
}

int asprintf	(	char **	strp,
		const char *	fmt,
			...
	)

Write a formatted string to newly allocated memory.

Parameters:

	strp	Pointer to hold allocated string
	fmt	Format string
	...	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Definition at line 41 of file asprintf.c.

References va_end, va_start, and vasprintf().

Referenced by dns_qualify_name(), expand_command(), and resolve_path().

                                                   {
        va_list args;
        int len;

        va_start ( args, fmt );
        len = vasprintf ( strp, fmt, args );
        va_end ( args );
        return len;
}