1 /*
2 ** apiprint.c
3 **
4 */
5
6 #include <string.h>
7 #include "mrdb.h"
8 #include <mruby/value.h>
9 #include <mruby/class.h>
10 #include <mruby/compile.h>
11 #include <mruby/error.h>
12 #include <mruby/numeric.h>
13 #include <mruby/string.h>
14 #include "apiprint.h"
15
16 static void
mrdb_check_syntax(mrb_state * mrb,mrb_debug_context * dbg,const char * expr,size_t len)17 mrdb_check_syntax(mrb_state *mrb, mrb_debug_context *dbg, const char *expr, size_t len)
18 {
19 mrbc_context *c;
20
21 c = mrbc_context_new(mrb);
22 c->no_exec = TRUE;
23 c->capture_errors = TRUE;
24 mrbc_filename(mrb, c, (const char*)dbg->prvfile);
25 c->lineno = dbg->prvline;
26
27 /* Load program */
28 mrb_load_nstring_cxt(mrb, expr, len, c);
29
30 mrbc_context_free(mrb, c);
31 }
32
33 mrb_value
mrb_debug_eval(mrb_state * mrb,mrb_debug_context * dbg,const char * expr,size_t len,mrb_bool * exc,int direct_eval)34 mrb_debug_eval(mrb_state *mrb, mrb_debug_context *dbg, const char *expr, size_t len, mrb_bool *exc, int direct_eval)
35 {
36 void (*tmp)(struct mrb_state *, struct mrb_irep *, const mrb_code *, mrb_value *);
37 mrb_value ruby_code;
38 mrb_value s;
39 mrb_value v;
40 mrb_value recv;
41
42 /* disable code_fetch_hook */
43 tmp = mrb->code_fetch_hook;
44 mrb->code_fetch_hook = NULL;
45
46 mrdb_check_syntax(mrb, dbg, expr, len);
47 if (mrb->exc) {
48 v = mrb_obj_value(mrb->exc);
49 mrb->exc = 0;
50 }
51 else if (direct_eval) {
52 recv = dbg->regs[0];
53
54 v = mrb_funcall(mrb, recv, expr, 0);
55 }
56 else {
57 /*
58 * begin
59 * expr
60 * rescue => e
61 * e
62 * end
63 */
64 ruby_code = mrb_str_new_lit(mrb, "begin\n");
65 ruby_code = mrb_str_cat(mrb, ruby_code, expr, len);
66 ruby_code = mrb_str_cat_lit(mrb, ruby_code, "\nrescue => e\ne\nend");
67
68 recv = dbg->regs[0];
69
70 v = mrb_funcall(mrb, recv, "instance_eval", 1, ruby_code);
71 }
72
73 if (exc) {
74 *exc = mrb_obj_is_kind_of(mrb, v, mrb->eException_class);
75 }
76
77 s = mrb_inspect(mrb, v);
78
79 /* enable code_fetch_hook */
80 mrb->code_fetch_hook = tmp;
81
82 return s;
83 }
84