archie/prospero/lib/pfs/atr_build.c

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2024-05-27 16:13:40 +02:00
/* Build an attribute
Author - Mitra
(Steve - feel free to incorporate as you wish)
*/
#include <pfs.h>
/* Build a PATTRIB, with its list of tokens */
/* Note convention that calling routing passes last arg as (char *)0 */
/* Also note , that passing (char *)1 will force the next argument to
be pointed to, rather than copied (which is what tkappend does) */
/* Return it - this fills in defaults, caller can override */
PATTRIB
vatbuild(char *name, va_list ap)
{
char *s;
PATTRIB at = atalloc();
at->aname = stcopy(name);
/* If any of these arent reasonable defaults move up to callers */
at->avtype = ATR_SEQUENCE;
if (strequal(name, "ACCESS-METHOD"))
at->nature = ATR_NATURE_FIELD;
else if strequal(name,"CONTENTS")
at->nature = ATR_NATURE_INTRINSIC;
else
at->nature = ATR_NATURE_APPLICATION;
at->precedence = ATR_PREC_OBJECT;
while(s = va_arg(ap, char *)) {
if (s == (char *) 1) {
at->value.sequence =
tkappend(NULL,at->value.sequence);
s = va_arg(ap, char *);
at->value.sequence->previous->token = s;
} else
at->value.sequence =
tkappend(s, at->value.sequence);
}
return(at);
}