ascatprintf.c

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#include "config.h"
#include "ascatprintf.h"

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

size_t ascatprintf(char **string, size_t len, char *template, ...)
{
        char *part = NULL;
        va_list ap;
        va_start(ap, template);
        size_t part_len = vasprintf(&part, template, ap);
        va_end(ap);
        if(*string == NULL)
        {
                *string = part;
                len = part_len;
        }
        else
        {
                *string = (char *)realloc(*string, (len += part_len) + 1);
                strcat(*string, part);
                free(part);
                part = NULL;
        }
        return len;
}