/
error.c
399 lines (343 loc) · 9.62 KB
/
error.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
/*
** error.c - Exception class
**
** See Copyright Notice in mruby.h
*/
#include "mruby.h"
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <setjmp.h>
#include "error.h"
#include "opcode.h"
#include "mruby/irep.h"
#include "mruby/proc.h"
#include "mruby/numeric.h"
#include "mruby/variable.h"
#include "mruby/string.h"
#include "mruby/class.h"
#define warn_printf printf
mrb_value
mrb_exc_new(mrb_state *mrb, struct RClass *c, const char *ptr, long len)
{
return mrb_funcall(mrb, mrb_obj_value(c), "new", 1, mrb_str_new(mrb, ptr, len));
}
mrb_value
mrb_exc_new3(mrb_state *mrb, struct RClass* c, mrb_value str)
{
//StringValue(str);
mrb_string_value(mrb, &str);
return mrb_funcall(mrb, mrb_obj_value(c), "new", 1, str);
}
//mrb_value make_exception(mrb_state *mrb, int argc, mrb_value *argv, int isstr);
/*
* call-seq:
* Exception.new(msg = nil) -> exception
*
* Construct a new Exception object, optionally passing in
* a message.
*/
static mrb_value
exc_initialize(mrb_state *mrb, mrb_value exc)
{
mrb_value mesg;
if (mrb_get_args(mrb, "|o", &mesg) == 1) {
mrb_iv_set(mrb, exc, mrb_intern(mrb, "mesg"), mesg);
}
return exc;
}
/*
* Document-method: exception
*
* call-seq:
* exc.exception(string) -> an_exception or exc
*
* With no argument, or if the argument is the same as the receiver,
* return the receiver. Otherwise, create a new
* exception object of the same class as the receiver, but with a
* message equal to <code>string.to_str</code>.
*
*/
static mrb_value
exc_exception(mrb_state *mrb, mrb_value self)
{
mrb_value exc;
mrb_value *argv;
int argc;
mrb_get_args(mrb, "*", &argv, &argc);
if (argc == 0) return self;
if (argc == 1 && mrb_obj_equal(mrb, self, argv[0])) return self;
exc = mrb_obj_clone(mrb, self);
exc_initialize(mrb, exc);
return exc;
}
/*
* call-seq:
* exception.to_s -> string
*
* Returns exception's message (or the name of the exception if
* no message is set).
*/
static mrb_value
exc_to_s(mrb_state *mrb, mrb_value exc)
{
mrb_value mesg = mrb_attr_get(mrb, exc, mrb_intern(mrb, "mesg"));
if (mrb_nil_p(mesg)) return mrb_str_new2(mrb, mrb_obj_classname(mrb, exc));
return mesg;
}
/*
* call-seq:
* exception.message -> string
*
* Returns the result of invoking <code>exception.to_s</code>.
* Normally this returns the exception's message or name. By
* supplying a to_str method, exceptions are agreeing to
* be used where Strings are expected.
*/
static mrb_value
exc_message(mrb_state *mrb, mrb_value exc)
{
return mrb_funcall(mrb, exc, "to_s", 0);
}
/*
* call-seq:
* exception.inspect -> string
*
* Return this exception's class name an message
*/
static mrb_value
exc_inspect(mrb_state *mrb, mrb_value exc)
{
mrb_value str;
str = mrb_str_new2(mrb, mrb_obj_classname(mrb, exc));
exc = mrb_obj_as_string(mrb, exc);
if (RSTRING_LEN(exc) > 0) {
mrb_str_cat2(mrb, str, ": ");
mrb_str_append(mrb, str, exc);
}
return str;
}
static mrb_value
exc_equal(mrb_state *mrb, mrb_value exc)
{
mrb_value obj;
mrb_value mesg;
mrb_sym id_mesg = mrb_intern(mrb, "mesg");
mrb_get_args(mrb, "o", &obj);
if (mrb_obj_equal(mrb, exc, obj)) return mrb_true_value();
if (mrb_obj_class(mrb, exc) != mrb_obj_class(mrb, obj)) {
if ( mrb_respond_to(mrb, obj, mrb_intern(mrb, "message")) ) {
mesg = mrb_funcall(mrb, obj, "message", 0);
}
else
return mrb_false_value();
}
else {
mesg = mrb_attr_get(mrb, obj, id_mesg);
}
if (!mrb_equal(mrb, mrb_attr_get(mrb, exc, id_mesg), mesg))
return mrb_false_value();
return mrb_true_value();
}
void
mrb_exc_raise(mrb_state *mrb, mrb_value exc)
{
mrb->exc = (struct RObject*)mrb_object(exc);
longjmp(*(jmp_buf*)mrb->jmp, 1);
}
void
mrb_raise(mrb_state *mrb, struct RClass *c, const char *fmt, ...)
{
va_list args;
char buf[256];
int n;
va_start(args, fmt);
n = vsnprintf(buf, 256, fmt, args);
va_end(args);
if (n < 0) {
n = 0;
}
mrb_exc_raise(mrb, mrb_exc_new(mrb, c, buf, n));
}
void
mrb_name_error(mrb_state *mrb, mrb_sym id, const char *fmt, ...)
{
mrb_value exc, argv[2];
va_list args;
char buf[256];
int n;
va_start(args, fmt);
n = vsnprintf(buf, 256, fmt, args);
va_end(args);
if (n < 0) {
n = 0;
}
argv[0] = mrb_str_new(mrb, buf, n);
argv[1] = mrb_symbol_value(id); /* ignore now */
exc = mrb_class_new_instance(mrb, 1, argv, E_NAME_ERROR);
mrb_exc_raise(mrb, exc);
}
mrb_value
mrb_sprintf(mrb_state *mrb, const char *fmt, ...)
{
va_list args;
char buf[256];
int n;
va_start(args, fmt);
n = vsnprintf(buf, 256, fmt, args);
va_end(args);
if (n < 0) {
n = 0;
}
return mrb_str_new(mrb, buf, n);
}
void
mrb_warn(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
printf("warning: ");
vprintf(fmt, args);
va_end(args);
}
void
mrb_bug(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
printf("bug: ");
vprintf(fmt, args);
va_end(args);
exit(EXIT_FAILURE);
}
static const char *
mrb_strerrno(int err)
{
#define defined_error(name, num) if (err == num) return name;
#define undefined_error(name)
//#include "known_errors.inc"
#undef defined_error
#undef undefined_error
return NULL;
}
void
mrb_bug_errno(const char *mesg, int errno_arg)
{
if (errno_arg == 0)
mrb_bug("%s: errno == 0 (NOERROR)", mesg);
else {
const char *errno_str = mrb_strerrno(errno_arg);
if (errno_str)
mrb_bug("%s: %s (%s)", mesg, strerror(errno_arg), errno_str);
else
mrb_bug("%s: %s (%d)", mesg, strerror(errno_arg), errno_arg);
}
}
int
sysexit_status(mrb_state *mrb, mrb_value err)
{
mrb_value st = mrb_iv_get(mrb, err, mrb_intern(mrb, "status"));
return mrb_fixnum(st);
}
static void
set_backtrace(mrb_state *mrb, mrb_value info, mrb_value bt)
{
mrb_funcall(mrb, info, "set_backtrace", 1, bt);
}
mrb_value
make_exception(mrb_state *mrb, int argc, mrb_value *argv, int isstr)
{
mrb_value mesg;
int n;
mesg = mrb_nil_value();
switch (argc) {
case 0:
break;
case 1:
if (mrb_nil_p(argv[0]))
break;
if (isstr) {
mesg = mrb_check_string_type(mrb, argv[0]);
if (!mrb_nil_p(mesg)) {
mesg = mrb_exc_new3(mrb, mrb->eRuntimeError_class, mesg);
break;
}
}
n = 0;
goto exception_call;
case 2:
case 3:
n = 1;
exception_call:
//if (argv[0] == sysstack_error) return argv[0];
//CONST_ID(mrb, exception, "exception");
//mesg = mrb_check_funcall(mrb, argv[0], exception, n, argv+1);
//if (mrb_nil_p(mesg)) {
// /* undef */
// mrb_raise(mrb, E_TYPE_ERROR, "exception class/object expected");
//}
if (mrb_respond_to(mrb, argv[0], mrb_intern(mrb, "exception"))) {
mesg = mrb_funcall(mrb, argv[0], "exception", n, argv+1);
}
else {
/* undef */
mrb_raise(mrb, E_TYPE_ERROR, "exception class/object expected");
}
break;
default:
mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments (%d for 0..3)", argc);
break;
}
if (argc > 0) {
if (!mrb_obj_is_kind_of(mrb, mesg, mrb->eException_class))
mrb_raise(mrb, E_TYPE_ERROR, "exception object expected");
if (argc > 2)
set_backtrace(mrb, mesg, argv[2]);
}
return mesg;
}
mrb_value
mrb_make_exception(mrb_state *mrb, int argc, mrb_value *argv)
{
return make_exception(mrb, argc, argv, TRUE);
}
void
mrb_sys_fail(mrb_state *mrb, const char *mesg)
{
mrb_raise(mrb, mrb->eRuntimeError_class, "%s", mesg);
}
void
mrb_init_exception(mrb_state *mrb)
{
struct RClass *e;
struct RClass *eIndexError;
struct RClass *eRangeError;
struct RClass *eNameError;
mrb->eException_class = e = mrb_define_class(mrb, "Exception", mrb->object_class); /* 15.2.22 */
mrb_define_class_method(mrb, e, "exception", mrb_instance_new, ARGS_ANY());
mrb_define_method(mrb, e, "exception", exc_exception, ARGS_ANY());
mrb_define_method(mrb, e, "initialize", exc_initialize, ARGS_ANY());
mrb_define_method(mrb, e, "==", exc_equal, ARGS_REQ(1));
mrb_define_method(mrb, e, "to_s", exc_to_s, ARGS_NONE());
mrb_define_method(mrb, e, "message", exc_message, ARGS_NONE());
mrb_define_method(mrb, e, "inspect", exc_inspect, ARGS_NONE());
mrb->eStandardError_class = mrb_define_class(mrb, "StandardError", mrb->eException_class); /* 15.2.23 */
mrb->eRuntimeError_class = mrb_define_class(mrb, "RuntimeError", mrb->eStandardError_class); /* 15.2.28 */
mrb_define_class(mrb, "TypeError", mrb->eStandardError_class); /* 15.2.29 */
mrb_define_class(mrb, "ArgumentError", mrb->eStandardError_class); /* 15.2.24 */
eIndexError = mrb_define_class(mrb, "IndexError", mrb->eStandardError_class); /* 15.2.33 */
eRangeError = mrb_define_class(mrb, "RangeError", mrb->eStandardError_class); /* 15.2.26 */
eNameError = mrb_define_class(mrb, "NameError", mrb->eStandardError_class); /* 15.2.31 */
mrb_define_class(mrb, "NoMethodError", eNameError); /* 15.2.32 */
// mrb_define_class(mrb, "SystemCallError", mrb->eStandardError_class); /* 15.2.36 */
mrb_define_class(mrb, "LocalJumpError", mrb->eStandardError_class); /* 15.2.25 */
#ifdef INCLUDE_REGEX
mrb_define_class(mrb, "RegexpError", mrb->eStandardError_class); /* 15.2.27 */
#endif
#ifdef INCLUDE_ENCODING
mrb_define_class(mrb, "EncodingError", mrb->eStandardError_class);
#endif
// mrb_define_class(mrb, "ZeroDivisionError", mrb->eStandardError_class); /* 15.2.30 */
mrb_define_class(mrb, "FloatDomainError", eRangeError);
mrb_define_class(mrb, "KeyError", eIndexError);
}