[270] | 1 | /*
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| 2 | ** proc.c - Proc class
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| 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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[331] | 7 | #include <mruby.h>
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| 8 | #include <mruby/class.h>
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| 9 | #include <mruby/proc.h>
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| 10 | #include <mruby/opcode.h>
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[270] | 11 |
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| 12 | static mrb_code call_iseq[] = {
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| 13 | MKOP_A(OP_CALL, 0),
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| 14 | };
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| 15 |
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| 16 | struct RProc *
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| 17 | mrb_proc_new(mrb_state *mrb, mrb_irep *irep)
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| 18 | {
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| 19 | struct RProc *p;
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| 20 | mrb_callinfo *ci = mrb->c->ci;
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| 21 |
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| 22 | p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
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| 23 | p->target_class = 0;
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| 24 | if (ci) {
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| 25 | if (ci->proc)
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| 26 | p->target_class = ci->proc->target_class;
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| 27 | if (!p->target_class)
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| 28 | p->target_class = ci->target_class;
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| 29 | }
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| 30 | p->body.irep = irep;
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| 31 | p->env = 0;
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| 32 | mrb_irep_incref(mrb, irep);
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| 33 |
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| 34 | return p;
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| 35 | }
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| 36 |
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| 37 | static struct REnv*
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| 38 | env_new(mrb_state *mrb, int nlocals)
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| 39 | {
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| 40 | struct REnv *e;
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| 41 |
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| 42 | e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, (struct RClass*)mrb->c->ci->proc->env);
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| 43 | MRB_SET_ENV_STACK_LEN(e, nlocals);
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[331] | 44 | e->cxt.c = mrb->c;
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[270] | 45 | e->cioff = mrb->c->ci - mrb->c->cibase;
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| 46 | e->stack = mrb->c->stack;
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| 47 |
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| 48 | return e;
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| 49 | }
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| 50 |
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| 51 | static void
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| 52 | closure_setup(mrb_state *mrb, struct RProc *p, int nlocals)
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| 53 | {
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| 54 | struct REnv *e;
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| 55 |
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| 56 | if (!mrb->c->ci->env) {
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| 57 | e = env_new(mrb, nlocals);
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| 58 | mrb->c->ci->env = e;
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| 59 | }
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| 60 | else {
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| 61 | e = mrb->c->ci->env;
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| 62 | }
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| 63 | p->env = e;
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[331] | 64 | mrb_field_write_barrier(mrb, (struct RBasic *)p, (struct RBasic *)p->env);
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[270] | 65 | }
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| 66 |
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| 67 | struct RProc *
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| 68 | mrb_closure_new(mrb_state *mrb, mrb_irep *irep)
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| 69 | {
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| 70 | struct RProc *p = mrb_proc_new(mrb, irep);
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| 71 |
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| 72 | closure_setup(mrb, p, mrb->c->ci->proc->body.irep->nlocals);
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| 73 | return p;
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| 74 | }
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| 75 |
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| 76 | MRB_API struct RProc *
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| 77 | mrb_proc_new_cfunc(mrb_state *mrb, mrb_func_t func)
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| 78 | {
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| 79 | struct RProc *p;
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| 80 |
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| 81 | p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
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| 82 | p->body.func = func;
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| 83 | p->flags |= MRB_PROC_CFUNC;
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| 84 | p->env = 0;
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| 85 |
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| 86 | return p;
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| 87 | }
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| 88 |
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| 89 | MRB_API struct RProc *
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| 90 | mrb_proc_new_cfunc_with_env(mrb_state *mrb, mrb_func_t func, mrb_int argc, const mrb_value *argv)
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| 91 | {
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| 92 | struct RProc *p = mrb_proc_new_cfunc(mrb, func);
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| 93 | struct REnv *e;
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| 94 | int i;
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| 95 |
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| 96 | p->env = e = env_new(mrb, argc);
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| 97 | mrb_field_write_barrier(mrb, (struct RBasic *)p, (struct RBasic *)p->env);
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| 98 | MRB_ENV_UNSHARE_STACK(e);
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| 99 | e->stack = (mrb_value*)mrb_malloc(mrb, sizeof(mrb_value) * argc);
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| 100 | if (argv) {
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| 101 | for (i = 0; i < argc; ++i) {
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| 102 | e->stack[i] = argv[i];
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| 103 | }
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| 104 | }
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| 105 | else {
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| 106 | for (i = 0; i < argc; ++i) {
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| 107 | SET_NIL_VALUE(e->stack[i]);
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| 108 | }
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| 109 | }
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| 110 | return p;
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| 111 | }
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| 112 |
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| 113 | MRB_API struct RProc *
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| 114 | mrb_closure_new_cfunc(mrb_state *mrb, mrb_func_t func, int nlocals)
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| 115 | {
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| 116 | return mrb_proc_new_cfunc_with_env(mrb, func, nlocals, NULL);
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| 117 | }
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| 118 |
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| 119 | MRB_API mrb_value
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| 120 | mrb_proc_cfunc_env_get(mrb_state *mrb, mrb_int idx)
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| 121 | {
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| 122 | struct RProc *p = mrb->c->ci->proc;
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| 123 | struct REnv *e = p->env;
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| 124 |
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| 125 | if (!MRB_PROC_CFUNC_P(p)) {
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| 126 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from non-cfunc proc.");
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| 127 | }
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| 128 | if (!e) {
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| 129 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from cfunc Proc without REnv.");
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| 130 | }
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| 131 | if (idx < 0 || MRB_ENV_STACK_LEN(e) <= idx) {
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| 132 | mrb_raisef(mrb, E_INDEX_ERROR, "Env index out of range: %S (expected: 0 <= index < %S)",
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| 133 | mrb_fixnum_value(idx), mrb_fixnum_value(MRB_ENV_STACK_LEN(e)));
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| 134 | }
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| 135 |
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| 136 | return e->stack[idx];
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| 137 | }
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| 138 |
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[331] | 139 | void
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[270] | 140 | mrb_proc_copy(struct RProc *a, struct RProc *b)
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| 141 | {
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| 142 | a->flags = b->flags;
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| 143 | a->body = b->body;
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[331] | 144 | if (!MRB_PROC_CFUNC_P(a) && a->body.irep) {
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[270] | 145 | a->body.irep->refcnt++;
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| 146 | }
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| 147 | a->target_class = b->target_class;
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| 148 | a->env = b->env;
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| 149 | }
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| 150 |
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| 151 | static mrb_value
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[331] | 152 | mrb_proc_s_new(mrb_state *mrb, mrb_value proc_class)
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[270] | 153 | {
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| 154 | mrb_value blk;
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[331] | 155 | mrb_value proc;
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| 156 | struct RProc *p;
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[270] | 157 |
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| 158 | mrb_get_args(mrb, "&", &blk);
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| 159 | if (mrb_nil_p(blk)) {
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| 160 | /* Calling Proc.new without a block is not implemented yet */
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| 161 | mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
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| 162 | }
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[331] | 163 | p = (struct RProc *)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb_class_ptr(proc_class));
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| 164 | mrb_proc_copy(p, mrb_proc_ptr(blk));
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| 165 | proc = mrb_obj_value(p);
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| 166 | mrb_funcall_with_block(mrb, proc, mrb_intern_lit(mrb, "initialize"), 0, NULL, blk);
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| 167 | return proc;
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[270] | 168 | }
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| 169 |
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| 170 | static mrb_value
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| 171 | mrb_proc_init_copy(mrb_state *mrb, mrb_value self)
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| 172 | {
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| 173 | mrb_value proc;
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| 174 |
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| 175 | mrb_get_args(mrb, "o", &proc);
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| 176 | if (mrb_type(proc) != MRB_TT_PROC) {
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| 177 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
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| 178 | }
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| 179 | mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(proc));
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| 180 | return self;
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| 181 | }
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| 182 |
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| 183 | int
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| 184 | mrb_proc_cfunc_p(struct RProc *p)
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| 185 | {
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| 186 | return MRB_PROC_CFUNC_P(p);
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| 187 | }
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| 188 |
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| 189 | mrb_value
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| 190 | mrb_proc_call_cfunc(mrb_state *mrb, struct RProc *p, mrb_value self)
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| 191 | {
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| 192 | return (p->body.func)(mrb, self);
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| 193 | }
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| 194 |
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| 195 | /* 15.2.17.4.2 */
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| 196 | static mrb_value
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| 197 | mrb_proc_arity(mrb_state *mrb, mrb_value self)
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| 198 | {
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| 199 | struct RProc *p = mrb_proc_ptr(self);
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[331] | 200 | struct mrb_irep *irep;
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| 201 | mrb_code *iseq;
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[270] | 202 | mrb_aspec aspec;
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| 203 | int ma, op, ra, pa, arity;
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| 204 |
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| 205 | if (MRB_PROC_CFUNC_P(p)) {
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| 206 | /* TODO cfunc aspec not implemented yet */
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| 207 | return mrb_fixnum_value(-1);
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| 208 | }
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| 209 |
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[331] | 210 | irep = p->body.irep;
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| 211 | if (!irep) {
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| 212 | return mrb_fixnum_value(0);
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| 213 | }
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| 214 |
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| 215 | iseq = irep->iseq;
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[270] | 216 | /* arity is depend on OP_ENTER */
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| 217 | if (GET_OPCODE(*iseq) != OP_ENTER) {
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| 218 | return mrb_fixnum_value(0);
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| 219 | }
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| 220 |
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| 221 | aspec = GETARG_Ax(*iseq);
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| 222 | ma = MRB_ASPEC_REQ(aspec);
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| 223 | op = MRB_ASPEC_OPT(aspec);
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| 224 | ra = MRB_ASPEC_REST(aspec);
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| 225 | pa = MRB_ASPEC_POST(aspec);
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| 226 | arity = ra || (MRB_PROC_STRICT_P(p) && op) ? -(ma + pa + 1) : ma + pa;
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| 227 |
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| 228 | return mrb_fixnum_value(arity);
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| 229 | }
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| 230 |
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| 231 | /* 15.3.1.2.6 */
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| 232 | /* 15.3.1.3.27 */
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| 233 | /*
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| 234 | * call-seq:
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| 235 | * lambda { |...| block } -> a_proc
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| 236 | *
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| 237 | * Equivalent to <code>Proc.new</code>, except the resulting Proc objects
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| 238 | * check the number of parameters passed when called.
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| 239 | */
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| 240 | static mrb_value
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| 241 | proc_lambda(mrb_state *mrb, mrb_value self)
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| 242 | {
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| 243 | mrb_value blk;
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| 244 | struct RProc *p;
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| 245 |
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| 246 | mrb_get_args(mrb, "&", &blk);
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| 247 | if (mrb_nil_p(blk)) {
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| 248 | mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
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| 249 | }
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| 250 | if (mrb_type(blk) != MRB_TT_PROC) {
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| 251 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
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| 252 | }
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| 253 | p = mrb_proc_ptr(blk);
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| 254 | if (!MRB_PROC_STRICT_P(p)) {
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| 255 | struct RProc *p2 = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, p->c);
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| 256 | mrb_proc_copy(p2, p);
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| 257 | p2->flags |= MRB_PROC_STRICT;
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| 258 | return mrb_obj_value(p2);
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| 259 | }
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| 260 | return blk;
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| 261 | }
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| 262 |
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| 263 | void
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| 264 | mrb_init_proc(mrb_state *mrb)
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| 265 | {
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| 266 | struct RProc *m;
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| 267 | mrb_irep *call_irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
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| 268 | static const mrb_irep mrb_irep_zero = { 0 };
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| 269 |
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| 270 | *call_irep = mrb_irep_zero;
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| 271 | call_irep->flags = MRB_ISEQ_NO_FREE;
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| 272 | call_irep->iseq = call_iseq;
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| 273 | call_irep->ilen = 1;
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[331] | 274 | call_irep->nregs = 2; /* receiver and block */
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[270] | 275 |
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[331] | 276 | mrb_define_class_method(mrb, mrb->proc_class, "new", mrb_proc_s_new, MRB_ARGS_ANY());
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[270] | 277 | mrb_define_method(mrb, mrb->proc_class, "initialize_copy", mrb_proc_init_copy, MRB_ARGS_REQ(1));
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| 278 | mrb_define_method(mrb, mrb->proc_class, "arity", mrb_proc_arity, MRB_ARGS_NONE());
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| 279 |
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| 280 | m = mrb_proc_new(mrb, call_irep);
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| 281 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "call"), m);
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| 282 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "[]"), m);
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| 283 |
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| 284 | mrb_define_class_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.2.6 */
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| 285 | mrb_define_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.3.27 */
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| 286 | }
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