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/*
** proc.c - Proc class
**
** See Copyright Notice in mruby.h
*/
#include "mruby.h"
#include "mruby/class.h"
#include "mruby/proc.h"
#include "opcode.h"
static mrb_code call_iseq[] = {
MKOP_A(OP_CALL, 0),
};
struct RProc *
mrb_proc_new(mrb_state *mrb, mrb_irep *irep)
{
struct RProc *p;
p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
p->target_class = (mrb->c->ci) ? mrb->c->ci->target_class : 0;
p->body.irep = irep;
p->env = 0;
return p;
}
static inline void
closure_setup(mrb_state *mrb, struct RProc *p, int nlocals)
{
struct REnv *e;
if (!mrb->c->ci->env) {
e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, (struct RClass*)mrb->c->ci->proc->env);
e->flags= (unsigned int)nlocals;
e->mid = mrb->c->ci->mid;
e->cioff = mrb->c->ci - mrb->c->cibase;
e->stack = mrb->c->stack;
mrb->c->ci->env = e;
}
else {
e = mrb->c->ci->env;
}
p->env = e;
}
struct RProc *
mrb_closure_new(mrb_state *mrb, mrb_irep *irep)
{
struct RProc *p = mrb_proc_new(mrb, irep);
closure_setup(mrb, p, mrb->c->ci->proc->body.irep->nlocals);
return p;
}
struct RProc *
mrb_proc_new_cfunc(mrb_state *mrb, mrb_func_t func)
{
struct RProc *p;
p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
p->body.func = func;
p->flags |= MRB_PROC_CFUNC;
return p;
}
struct RProc *
mrb_closure_new_cfunc(mrb_state *mrb, mrb_func_t func, int nlocals)
{
struct RProc *p = mrb_proc_new_cfunc(mrb, func);
closure_setup(mrb, p, nlocals);
return p;
}
void
mrb_proc_copy(struct RProc *a, struct RProc *b)
{
a->flags = b->flags;
a->body = b->body;
a->target_class = b->target_class;
a->env = b->env;
}
static mrb_value
mrb_proc_initialize(mrb_state *mrb, mrb_value self)
{
mrb_value blk;
mrb_get_args(mrb, "&", &blk);
if (mrb_nil_p(blk)) {
/* Calling Proc.new without a block is not implemented yet */
mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
}
else {
mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(blk));
}
return self;
}
static mrb_value
mrb_proc_init_copy(mrb_state *mrb, mrb_value self)
{
mrb_value proc;
mrb_get_args(mrb, "o", &proc);
if (mrb_type(proc) != MRB_TT_PROC) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
}
mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(proc));
return self;
}
int
mrb_proc_cfunc_p(struct RProc *p)
{
return MRB_PROC_CFUNC_P(p);
}
mrb_value
mrb_proc_call_cfunc(mrb_state *mrb, struct RProc *p, mrb_value self)
{
return (p->body.func)(mrb, self);
}
mrb_code*
mrb_proc_iseq(mrb_state *mrb, struct RProc *p)
{
return p->body.irep->iseq;
}
/* 15.2.17.4.2 */
static mrb_value
mrb_proc_arity(mrb_state *mrb, mrb_value self)
{
struct RProc *p = mrb_proc_ptr(self);
mrb_code *iseq = mrb_proc_iseq(mrb, p);
mrb_aspec aspec = GETARG_Ax(*iseq);
int ma, ra, pa, arity;
ma = MRB_ASPEC_REQ(aspec);
ra = MRB_ASPEC_REST(aspec);
pa = MRB_ASPEC_POST(aspec);
arity = ra ? -(ma + pa + 1) : ma + pa;
return mrb_fixnum_value(arity);
}
/* 15.3.1.2.6 */
/* 15.3.1.3.27 */
/*
* call-seq:
* lambda { |...| block } -> a_proc
*
* Equivalent to <code>Proc.new</code>, except the resulting Proc objects
* check the number of parameters passed when called.
*/
static mrb_value
proc_lambda(mrb_state *mrb, mrb_value self)
{
mrb_value blk;
struct RProc *p;
mrb_get_args(mrb, "&", &blk);
if (mrb_nil_p(blk)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
}
p = mrb_proc_ptr(blk);
if (!MRB_PROC_STRICT_P(p)) {
struct RProc *p2 = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, p->c);
mrb_proc_copy(p2, p);
p2->flags |= MRB_PROC_STRICT;
return mrb_obj_value(p2);
}
return blk;
}
void
mrb_init_proc(mrb_state *mrb)
{
struct RProc *m;
mrb_irep *call_irep = (mrb_irep *)mrb_alloca(mrb, sizeof(mrb_irep));
static const mrb_irep mrb_irep_zero = { 0 };
if ( call_iseq == NULL || call_irep == NULL )
return;
*call_irep = mrb_irep_zero;
call_irep->flags = MRB_ISEQ_NO_FREE;
call_irep->idx = -1;
call_irep->iseq = call_iseq;
call_irep->ilen = 1;
mrb->proc_class = mrb_define_class(mrb, "Proc", mrb->object_class);
MRB_SET_INSTANCE_TT(mrb->proc_class, MRB_TT_PROC);
mrb_define_method(mrb, mrb->proc_class, "initialize", mrb_proc_initialize, MRB_ARGS_NONE());
mrb_define_method(mrb, mrb->proc_class, "initialize_copy", mrb_proc_init_copy, MRB_ARGS_REQ(1));
mrb_define_method(mrb, mrb->proc_class, "arity", mrb_proc_arity, MRB_ARGS_NONE());
m = mrb_proc_new(mrb, call_irep);
mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern2(mrb, "call", 4), m);
mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern2(mrb, "[]", 2), m);
mrb_define_class_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.2.6 */
mrb_define_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.3.27 */
}
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