50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/**
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* Write a formatted string to newly allocated memory.
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*
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* @v strp Pointer to hold allocated string
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* @v fmt Format string
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* @v args Arguments corresponding to the format string
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* @ret len Length of formatted string
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*/
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int vasprintf ( char **strp, const char *fmt, va_list args ) {
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size_t len;
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va_list args_tmp;
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/* Calculate length needed for string */
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va_copy ( args_tmp, args );
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len = ( vsnprintf ( NULL, 0, fmt, args_tmp ) + 1 );
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va_end ( args_tmp );
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/* Allocate and fill string */
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*strp = malloc ( len );
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if ( ! *strp )
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return -ENOMEM;
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return vsnprintf ( *strp, len, fmt, args );
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}
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/**
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* Write a formatted string to newly allocated memory.
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*
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* @v strp Pointer to hold allocated string
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* @v fmt Format string
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* @v ... Arguments corresponding to the format string
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* @ret len Length of formatted string
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*/
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int asprintf ( char **strp, const char *fmt, ... ) {
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va_list args;
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int len;
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va_start ( args, fmt );
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len = vasprintf ( strp, fmt, args );
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va_end ( args );
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return len;
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}
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