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#include <string.h>
#include <mruby.h>
#include <mruby/class.h>
#include <mruby/data.h>
#include <mruby/string.h>
#ifdef MRB_WITHOUT_FLOAT
typedef mrb_int mrb_float;
#define mrb_float(o) mrb_fixnum(o)
#endif
#define NATIVE_TYPES \
char c; \
int d; \
mrb_float f; \
mrb_int i; \
/* size_t l; */\
mrb_sym n; \
char *s; \
struct RClass *C
#define NATIVE_DEFINE_TYPE_FUNC(t) \
static mrb_value \
native_s_##t(mrb_state *mrb, mrb_value klass) \
{ \
mrb_value obj, type = mrb_fixnum_value(ARG_##t); \
mrb_get_args(mrb, "o", &obj); \
return mrb_funcall(mrb, klass, "new", 2, type, obj); \
}
#define NATIVE_DEFINE_TYPE_METHOD(t) \
mrb_define_class_method(mrb, n, #t, native_s_##t, MRB_ARGS_REQ(1))
typedef enum {
ARG_c,
ARG_d,
ARG_f,
ARG_i,
/* ARG_l,*/
ARG_n,
ARG_s,
ARG_C,
ARG_v,
} VFArgumentType;
typedef struct {
VFArgumentType type;
union { NATIVE_TYPES; };
} VFNative;
typedef struct {
VFArgumentType type;
union {
NATIVE_TYPES;
mrb_value v;
};
} VFArgument;
static void
native_free(mrb_state *mrb, void *data)
{
VFNative *native = (VFNative*)data;
if (native->type == ARG_s) mrb_free(mrb, native->s);
mrb_free(mrb, native);
}
static const struct mrb_data_type native_data_type = {
"TestVFormat::Native", native_free
};
static mrb_value
native_initialize(mrb_state *mrb, mrb_value self)
{
VFNative data, *datap;
mrb_int type;
mrb_value obj;
mrb_get_args(mrb, "io", &type, &obj);
data.type = (VFArgumentType)type;
switch (data.type) {
case ARG_c: data.c = RSTRING_PTR(obj)[0]; break;
case ARG_d: data.d = (int)mrb_fixnum(obj); break;
case ARG_f: data.f = mrb_float(obj); break;
case ARG_i: data.i = mrb_fixnum(obj); break;
/* case ARG_l: data.l = (size_t)mrb_fixnum(obj); break;*/
case ARG_n: data.n = mrb_symbol(obj); break;
case ARG_s: data.s = (char*)mrb_malloc(mrb, RSTRING_LEN(obj) + 1);
memcpy(data.s, RSTRING_PTR(obj), RSTRING_LEN(obj));
data.s[RSTRING_LEN(obj)] = '\0'; break;
case ARG_C: data.C = mrb_class_ptr(obj); break;
default: mrb_raise(mrb, E_ARGUMENT_ERROR, "unknown type");
}
datap = (VFNative*)mrb_malloc(mrb, sizeof(VFNative));
*datap = data;
mrb_data_init(self, datap, &native_data_type);
return self;
}
NATIVE_DEFINE_TYPE_FUNC(c)
NATIVE_DEFINE_TYPE_FUNC(d)
NATIVE_DEFINE_TYPE_FUNC(f)
NATIVE_DEFINE_TYPE_FUNC(i)
/*NATIVE_DEFINE_TYPE_FUNC(l)*/
NATIVE_DEFINE_TYPE_FUNC(n)
NATIVE_DEFINE_TYPE_FUNC(s)
NATIVE_DEFINE_TYPE_FUNC(C)
static VFArgument*
arg_from_obj(mrb_state *mrb, mrb_value obj, struct RClass *native_class,
VFArgument *vf_arg)
{
if (mrb_obj_is_instance_of(mrb, obj, native_class)) {
const VFNative *native = (VFNative*)DATA_PTR(obj);
*(VFNative*)vf_arg = *native;
}
else {
vf_arg->v = obj;
vf_arg->type = ARG_v;
}
return vf_arg;
}
#define VF_FORMAT_INIT(klass) \
struct RClass *vf_native_class = \
mrb_class_get_under(mrb, mrb_class_ptr(klass), "Native"); \
VFArgument vf_args[2];
#define VF_ARG(args, idx) \
arg_from_obj(mrb, args[idx], vf_native_class, &vf_args[idx])
#define VF_FORMAT0(fmt) mrb_format(mrb, fmt);
#define VF_FORMAT1(fmt, args) \
(VF_ARG(args, 0), VF_FORMAT_TYPED(fmt, 1, vf_args, NULL))
#define VF_FORMAT2(fmt, args) ( \
VF_ARG(args, 0), VF_ARG(args, 1), \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, c) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, d) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, f) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, i) : \
/* VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, l) : */\
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, n) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, s) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, C) : \
VF_FORMAT2_COND_EXPR(fmt, vf_args, vf_args+1, v) : \
mrb_nil_value() /* not reached */ \
)
#define VF_FORMAT2_COND_EXPR(fmt, a1, a2, t) \
a1->type == ARG_##t ? VF_FORMAT_TYPED(fmt, 2, a2, (a1)->t)
#define VF_FORMAT_TYPED(fmt, n_arg, type_a, v1) \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, c) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, d) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, f) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, i) : \
/* VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, l) : */\
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, n) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, s) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, C) : \
VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, v) : \
mrb_nil_value() /* not reached */
#define VF_FORMAT_TYPED_COND_EXPR(fmt, n_arg, type_a, v1, t) \
(type_a)->type == ARG_##t ? n_arg == 1 ? \
mrb_format(mrb, fmt, (type_a)->t) : mrb_format(mrb, fmt, v1, (type_a)->t)
static mrb_value
vf_s_format(mrb_state *mrb, mrb_value klass)
{
mrb_value fmt_str, args[2];
mrb_int argc = mrb_get_args(mrb, "S|oo", &fmt_str, args, args+1);
const char *fmt = RSTRING_CSTR(mrb, fmt_str);
VF_FORMAT_INIT(klass);
switch (argc) {
case 1: return VF_FORMAT0(fmt);
case 2: return VF_FORMAT1(fmt, args);
case 3: return VF_FORMAT2(fmt, args);
default: return mrb_nil_value(); /* not reached */
}
}
void
mrb_init_test_vformat(mrb_state *mrb)
{
struct RClass *vf, *n;
vf = mrb_define_module(mrb, "TestVFormat");
mrb_define_class_method(mrb, vf, "format", vf_s_format, MRB_ARGS_ARG(1,2));
n = mrb_define_class_under(mrb, vf, "Native", mrb->object_class);
MRB_SET_INSTANCE_TT(n, MRB_TT_DATA);
NATIVE_DEFINE_TYPE_METHOD(c);
NATIVE_DEFINE_TYPE_METHOD(d);
NATIVE_DEFINE_TYPE_METHOD(f);
NATIVE_DEFINE_TYPE_METHOD(i);
/* NATIVE_DEFINE_TYPE_METHOD(l);*/
NATIVE_DEFINE_TYPE_METHOD(n);
NATIVE_DEFINE_TYPE_METHOD(s);
NATIVE_DEFINE_TYPE_METHOD(C);
mrb_define_method(mrb, n, "initialize", native_initialize, MRB_ARGS_REQ(2));
}
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