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#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
FILE_LICENCE ( GPL2_OR_LATER );
/**
* Write a formatted string to newly allocated memory.
*
* @v strp Pointer to hold allocated string
* @v fmt Format string
* @v args Arguments corresponding to the format string
* @ret len Length of formatted string
*/
int vasprintf ( char **strp, const char *fmt, va_list args ) {
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 );
}
/**
* Write a formatted string to newly allocated memory.
*
* @v strp Pointer to hold allocated string
* @v fmt Format string
* @v ... Arguments corresponding to the format string
* @ret len Length of formatted string
*/
int asprintf ( char **strp, const char *fmt, ... ) {
va_list args;
int len;
va_start ( args, fmt );
len = vasprintf ( strp, fmt, args );
va_end ( args );
return len;
}
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