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/* Copyright 2009-2016
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution of this software in source and binary forms, with or without
* modification, is permitted provided that the following two conditions are met.
*
* Use of this software in any manner constitutes agreement with the disclaimer
* which follows the two conditions.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
* AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
struct args {
cnum argc;
cnum fill;
val list;
val arg[1];
};
typedef int arg_index;
#define ARGS_MAX 32
#define ARGS_MIN 4
#define args_alloc(N) \
(coerce(struct args *, \
alloca(offsetof(struct args, arg) + (N)*sizeof (val))))
INLINE struct args *args_init_list(struct args *args, cnum argc, val list)
{
args->argc = argc;
args->fill = 0;
args->list = list;
return args;
}
INLINE struct args *args_init(struct args *args, cnum argc)
{
return args_init_list(args, argc, nil);
}
INLINE void args_set_fill(struct args *args, cnum fill)
{
args->fill = fill;
}
#define args_decl_list(NAME, N, L) \
mem_t *NAME ## _mem = \
coerce(mem_t *, \
alloca(offsetof(struct args, arg) + (N)*sizeof (val))); \
struct args *NAME = args_init_list(coerce(struct args *, \
NAME ## _mem), N, L)
#define args_decl(NAME, N) args_decl_list(NAME, N, nil)
INLINE val args_add(struct args *args, val arg)
{
return args->arg[args->fill++] = arg;
}
INLINE void args_add2(struct args *args, val arg1, val arg2)
{
val *arg = args->arg + args->fill;
args->fill += 2;
*arg++ = arg1;
*arg++ = arg2;
}
INLINE void args_add3(struct args *args, val arg1, val arg2, val arg3)
{
val *arg = args->arg + args->fill;
args->fill += 3;
*arg++ = arg1;
*arg++ = arg2;
*arg++ = arg3;
}
INLINE void args_add4(struct args *args, val arg1, val arg2, val arg3, val arg4)
{
val *arg = args->arg + args->fill;
args->fill += 4;
*arg++ = arg1;
*arg++ = arg2;
*arg++ = arg3;
*arg++ = arg4;
}
INLINE void args_add5(struct args *args, val arg1, val arg2, val arg3,
val arg4, val arg5)
{
val *arg = args->arg + args->fill;
args->fill += 5;
*arg++ = arg1;
*arg++ = arg2;
*arg++ = arg3;
*arg++ = arg4;
*arg++ = arg5;
}
val args_add_checked(val name, struct args *args, val arg);
INLINE void args_add_list(struct args *args, val list)
{
args->list = list;
}
INLINE int args_more(struct args *args, cnum index)
{
return index < args->fill || args->list;
}
INLINE int args_two_more(struct args *args, cnum index)
{
return
index + 1 < args->fill ||
(index + 1 == args->fill && args->list) ||
cdr(args->list);
}
void args_normalize(struct args *args, cnum fill);
void args_normalize_fill(struct args *args, cnum minfill, cnum maxfill);
INLINE val args_get_list(struct args *args)
{
if (args->fill == 0)
return z(args->list);
args_normalize(args, 0);
return z(args->list);
}
INLINE val args_get_rest(struct args *args, cnum index)
{
if (args->fill == index)
return z(args->list);
args_normalize(args, index);
return z(args->list);
}
INLINE val args_at(struct args *args, cnum arg_index)
{
if (arg_index < args->fill)
return args->arg[arg_index];
return car(args->list);
}
INLINE val args_atz(struct args *args, cnum arg_index)
{
if (arg_index < args->fill) {
return z(args->arg[arg_index]);
} else {
loc l = car_l(args->list);
return zap(valptr(l));
}
}
INLINE val args_get(struct args *args, cnum *arg_index)
{
if (*arg_index < args->fill)
return z(args->arg[(*arg_index)++]);
return pop(&args->list);
}
INLINE void args_clear(struct args *args)
{
args->fill = 0;
}
val args_get_checked(val name, struct args *args, cnum *arg_index);
struct args *args_copy(struct args *to, struct args *from);
struct args *args_copy_zap(struct args *to, struct args *from);
struct args *args_cat_zap(struct args *to, struct args *from);
val args_copy_to_list(struct args *args);
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