[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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[439] | 12 | static const mrb_code call_iseq[] = {
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| 13 | OP_CALL,
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[270] | 14 | };
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| 15 |
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[439] | 16 | struct RProc*
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[270] | 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 | if (ci) {
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[439] | 24 | struct RClass *tc = NULL;
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| 25 |
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| 26 | if (ci->proc) {
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| 27 | tc = MRB_PROC_TARGET_CLASS(ci->proc);
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| 28 | }
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| 29 | if (tc == NULL) {
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| 30 | tc = ci->target_class;
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| 31 | }
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| 32 | p->upper = ci->proc;
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| 33 | p->e.target_class = tc;
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[270] | 34 | }
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| 35 | p->body.irep = irep;
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| 36 | mrb_irep_incref(mrb, irep);
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| 37 |
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| 38 | return p;
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| 39 | }
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| 40 |
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| 41 | static struct REnv*
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[439] | 42 | env_new(mrb_state *mrb, mrb_int nlocals)
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[270] | 43 | {
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| 44 | struct REnv *e;
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[439] | 45 | mrb_callinfo *ci = mrb->c->ci;
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| 46 | int bidx;
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[270] | 47 |
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[439] | 48 | e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, NULL);
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| 49 | MRB_ENV_SET_STACK_LEN(e, nlocals);
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| 50 | bidx = ci->argc;
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| 51 | if (ci->argc < 0) bidx = 2;
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| 52 | else bidx += 1;
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| 53 | MRB_ENV_SET_BIDX(e, bidx);
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| 54 | e->mid = ci->mid;
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[270] | 55 | e->stack = mrb->c->stack;
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[439] | 56 | e->cxt = mrb->c;
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[270] | 57 |
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| 58 | return e;
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| 59 | }
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| 60 |
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| 61 | static void
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[439] | 62 | closure_setup(mrb_state *mrb, struct RProc *p)
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[270] | 63 | {
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[439] | 64 | mrb_callinfo *ci = mrb->c->ci;
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| 65 | struct RProc *up = p->upper;
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| 66 | struct REnv *e = NULL;
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[270] | 67 |
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[439] | 68 | if (ci && ci->env) {
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| 69 | e = ci->env;
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[270] | 70 | }
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[439] | 71 | else if (up) {
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| 72 | struct RClass *tc = MRB_PROC_TARGET_CLASS(p);
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| 73 |
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| 74 | e = env_new(mrb, up->body.irep->nlocals);
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| 75 | ci->env = e;
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| 76 | if (tc) {
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| 77 | e->c = tc;
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| 78 | mrb_field_write_barrier(mrb, (struct RBasic*)e, (struct RBasic*)tc);
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| 79 | }
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| 80 | if (MRB_PROC_ENV_P(up) && MRB_PROC_ENV(up)->cxt == NULL) {
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| 81 | e->mid = MRB_PROC_ENV(up)->mid;
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| 82 | }
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[270] | 83 | }
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[439] | 84 | if (e) {
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| 85 | p->e.env = e;
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| 86 | p->flags |= MRB_PROC_ENVSET;
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| 87 | mrb_field_write_barrier(mrb, (struct RBasic*)p, (struct RBasic*)e);
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| 88 | }
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[270] | 89 | }
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| 90 |
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[439] | 91 | struct RProc*
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[270] | 92 | mrb_closure_new(mrb_state *mrb, mrb_irep *irep)
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| 93 | {
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| 94 | struct RProc *p = mrb_proc_new(mrb, irep);
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| 95 |
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[439] | 96 | closure_setup(mrb, p);
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[270] | 97 | return p;
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| 98 | }
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| 99 |
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[439] | 100 | MRB_API struct RProc*
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[270] | 101 | mrb_proc_new_cfunc(mrb_state *mrb, mrb_func_t func)
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| 102 | {
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| 103 | struct RProc *p;
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| 104 |
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| 105 | p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
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| 106 | p->body.func = func;
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[439] | 107 | p->flags |= MRB_PROC_CFUNC_FL;
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| 108 | p->upper = 0;
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| 109 | p->e.target_class = 0;
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[270] | 110 |
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| 111 | return p;
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| 112 | }
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| 113 |
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[439] | 114 | MRB_API struct RProc*
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[270] | 115 | mrb_proc_new_cfunc_with_env(mrb_state *mrb, mrb_func_t func, mrb_int argc, const mrb_value *argv)
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| 116 | {
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| 117 | struct RProc *p = mrb_proc_new_cfunc(mrb, func);
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| 118 | struct REnv *e;
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| 119 | int i;
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| 120 |
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[439] | 121 | p->e.env = e = env_new(mrb, argc);
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| 122 | p->flags |= MRB_PROC_ENVSET;
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| 123 | mrb_field_write_barrier(mrb, (struct RBasic*)p, (struct RBasic*)e);
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[270] | 124 | MRB_ENV_UNSHARE_STACK(e);
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| 125 | e->stack = (mrb_value*)mrb_malloc(mrb, sizeof(mrb_value) * argc);
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| 126 | if (argv) {
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| 127 | for (i = 0; i < argc; ++i) {
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| 128 | e->stack[i] = argv[i];
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| 129 | }
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| 130 | }
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| 131 | else {
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| 132 | for (i = 0; i < argc; ++i) {
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| 133 | SET_NIL_VALUE(e->stack[i]);
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| 134 | }
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| 135 | }
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| 136 | return p;
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| 137 | }
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| 138 |
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[439] | 139 | MRB_API struct RProc*
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[270] | 140 | mrb_closure_new_cfunc(mrb_state *mrb, mrb_func_t func, int nlocals)
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| 141 | {
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| 142 | return mrb_proc_new_cfunc_with_env(mrb, func, nlocals, NULL);
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| 143 | }
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| 144 |
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| 145 | MRB_API mrb_value
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| 146 | mrb_proc_cfunc_env_get(mrb_state *mrb, mrb_int idx)
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| 147 | {
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| 148 | struct RProc *p = mrb->c->ci->proc;
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[439] | 149 | struct REnv *e;
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[270] | 150 |
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[439] | 151 | if (!p || !MRB_PROC_CFUNC_P(p)) {
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[270] | 152 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from non-cfunc proc.");
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| 153 | }
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[439] | 154 | e = MRB_PROC_ENV(p);
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[270] | 155 | if (!e) {
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| 156 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from cfunc Proc without REnv.");
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| 157 | }
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| 158 | if (idx < 0 || MRB_ENV_STACK_LEN(e) <= idx) {
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[439] | 159 | mrb_raisef(mrb, E_INDEX_ERROR, "Env index out of range: %i (expected: 0 <= index < %i)",
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| 160 | idx, MRB_ENV_STACK_LEN(e));
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[270] | 161 | }
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| 162 |
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| 163 | return e->stack[idx];
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| 164 | }
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| 165 |
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[331] | 166 | void
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[270] | 167 | mrb_proc_copy(struct RProc *a, struct RProc *b)
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| 168 | {
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[439] | 169 | if (a->body.irep) {
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| 170 | /* already initialized proc */
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| 171 | return;
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| 172 | }
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[270] | 173 | a->flags = b->flags;
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| 174 | a->body = b->body;
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[331] | 175 | if (!MRB_PROC_CFUNC_P(a) && a->body.irep) {
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[270] | 176 | a->body.irep->refcnt++;
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| 177 | }
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[439] | 178 | a->upper = b->upper;
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| 179 | a->e.env = b->e.env;
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| 180 | /* a->e.target_class = a->e.target_class; */
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[270] | 181 | }
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| 182 |
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| 183 | static mrb_value
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[331] | 184 | mrb_proc_s_new(mrb_state *mrb, mrb_value proc_class)
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[270] | 185 | {
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| 186 | mrb_value blk;
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[331] | 187 | mrb_value proc;
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| 188 | struct RProc *p;
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[270] | 189 |
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[439] | 190 | /* Calling Proc.new without a block is not implemented yet */
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| 191 | mrb_get_args(mrb, "&!", &blk);
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[331] | 192 | p = (struct RProc *)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb_class_ptr(proc_class));
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| 193 | mrb_proc_copy(p, mrb_proc_ptr(blk));
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| 194 | proc = mrb_obj_value(p);
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[439] | 195 | mrb_funcall_with_block(mrb, proc, mrb_intern_lit(mrb, "initialize"), 0, NULL, proc);
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| 196 | if (!MRB_PROC_STRICT_P(p) &&
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| 197 | mrb->c->ci > mrb->c->cibase && MRB_PROC_ENV(p) == mrb->c->ci[-1].env) {
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| 198 | p->flags |= MRB_PROC_ORPHAN;
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| 199 | }
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[331] | 200 | return proc;
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[270] | 201 | }
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| 202 |
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| 203 | static mrb_value
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| 204 | mrb_proc_init_copy(mrb_state *mrb, mrb_value self)
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| 205 | {
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| 206 | mrb_value proc;
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| 207 |
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| 208 | mrb_get_args(mrb, "o", &proc);
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[439] | 209 | if (!mrb_proc_p(proc)) {
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[270] | 210 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
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| 211 | }
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| 212 | mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(proc));
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| 213 | return self;
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| 214 | }
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| 215 |
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| 216 | /* 15.2.17.4.2 */
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| 217 | static mrb_value
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[439] | 218 | proc_arity(mrb_state *mrb, mrb_value self)
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[270] | 219 | {
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[439] | 220 | return mrb_fixnum_value(mrb_proc_arity(mrb_proc_ptr(self)));
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[270] | 221 | }
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| 222 |
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| 223 | /* 15.3.1.2.6 */
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| 224 | /* 15.3.1.3.27 */
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| 225 | /*
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| 226 | * call-seq:
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| 227 | * lambda { |...| block } -> a_proc
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| 228 | *
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| 229 | * Equivalent to <code>Proc.new</code>, except the resulting Proc objects
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| 230 | * check the number of parameters passed when called.
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| 231 | */
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| 232 | static mrb_value
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| 233 | proc_lambda(mrb_state *mrb, mrb_value self)
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| 234 | {
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| 235 | mrb_value blk;
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| 236 | struct RProc *p;
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| 237 |
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| 238 | mrb_get_args(mrb, "&", &blk);
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| 239 | if (mrb_nil_p(blk)) {
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| 240 | mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
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| 241 | }
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[439] | 242 | if (!mrb_proc_p(blk)) {
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[270] | 243 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
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| 244 | }
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| 245 | p = mrb_proc_ptr(blk);
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| 246 | if (!MRB_PROC_STRICT_P(p)) {
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| 247 | struct RProc *p2 = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, p->c);
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| 248 | mrb_proc_copy(p2, p);
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| 249 | p2->flags |= MRB_PROC_STRICT;
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| 250 | return mrb_obj_value(p2);
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| 251 | }
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| 252 | return blk;
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| 253 | }
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| 254 |
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[439] | 255 | mrb_int
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| 256 | mrb_proc_arity(const struct RProc *p)
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| 257 | {
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| 258 | struct mrb_irep *irep;
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| 259 | const mrb_code *pc;
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| 260 | mrb_aspec aspec;
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| 261 | int ma, op, ra, pa, arity;
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| 262 |
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| 263 | if (MRB_PROC_CFUNC_P(p)) {
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| 264 | /* TODO cfunc aspec not implemented yet */
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| 265 | return -1;
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| 266 | }
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| 267 |
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| 268 | irep = p->body.irep;
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| 269 | if (!irep) {
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| 270 | return 0;
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| 271 | }
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| 272 |
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| 273 | pc = irep->iseq;
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| 274 | /* arity is depend on OP_ENTER */
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| 275 | if (*pc != OP_ENTER) {
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| 276 | return 0;
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| 277 | }
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| 278 |
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| 279 | aspec = PEEK_W(pc+1);
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| 280 | ma = MRB_ASPEC_REQ(aspec);
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| 281 | op = MRB_ASPEC_OPT(aspec);
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| 282 | ra = MRB_ASPEC_REST(aspec);
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| 283 | pa = MRB_ASPEC_POST(aspec);
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| 284 | arity = ra || (MRB_PROC_STRICT_P(p) && op) ? -(ma + pa + 1) : ma + pa;
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| 285 |
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| 286 | return arity;
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| 287 | }
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| 288 |
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[270] | 289 | void
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| 290 | mrb_init_proc(mrb_state *mrb)
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| 291 | {
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[439] | 292 | struct RProc *p;
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| 293 | mrb_method_t m;
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[270] | 294 | mrb_irep *call_irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
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| 295 | static const mrb_irep mrb_irep_zero = { 0 };
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| 296 |
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| 297 | *call_irep = mrb_irep_zero;
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| 298 | call_irep->flags = MRB_ISEQ_NO_FREE;
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| 299 | call_irep->iseq = call_iseq;
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| 300 | call_irep->ilen = 1;
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[331] | 301 | call_irep->nregs = 2; /* receiver and block */
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[270] | 302 |
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[439] | 303 | mrb_define_class_method(mrb, mrb->proc_class, "new", mrb_proc_s_new, MRB_ARGS_NONE()|MRB_ARGS_BLOCK());
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[270] | 304 | mrb_define_method(mrb, mrb->proc_class, "initialize_copy", mrb_proc_init_copy, MRB_ARGS_REQ(1));
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[439] | 305 | mrb_define_method(mrb, mrb->proc_class, "arity", proc_arity, MRB_ARGS_NONE());
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[270] | 306 |
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[439] | 307 | p = mrb_proc_new(mrb, call_irep);
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| 308 | MRB_METHOD_FROM_PROC(m, p);
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[270] | 309 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "call"), m);
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| 310 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "[]"), m);
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| 311 |
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[439] | 312 | mrb_define_class_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()|MRB_ARGS_BLOCK()); /* 15.3.1.2.6 */
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| 313 | mrb_define_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()|MRB_ARGS_BLOCK()); /* 15.3.1.3.27 */
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[270] | 314 | }
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