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Member "wrk-4.2.0/src/aprintf.c" (7 Feb 2021, 536 Bytes) of package /linux/www/wrk-4.2.0.tar.gz:

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    1 // Copyright (C) 2012 - Will Glozer.  All rights reserved.
    2 
    3 #include <stdarg.h>
    4 #include <stdlib.h>
    5 #include <stdio.h>
    6 #include <string.h>
    7 
    8 char *aprintf(char **s, const char *fmt, ...) {
    9     char *c = NULL;
   10     int n, len;
   11     va_list ap;
   12 
   13     va_start(ap, fmt);
   14     n = vsnprintf(NULL, 0, fmt, ap) + 1;
   15     va_end(ap);
   16 
   17     len = *s ? strlen(*s) : 0;
   18 
   19     if ((*s = realloc(*s, (len + n) * sizeof(char)))) {
   20         c = *s + len;
   21         va_start(ap, fmt);
   22         vsnprintf(c, n, fmt, ap);
   23         va_end(ap);
   24     }
   25 
   26     return c;
   27 }