mruby/src/error.c at master · Blorgus/mruby · GitHub

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** 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 a;

int argc;

argc = mrb_get_args(mrb, "|o", &a);

if (argc == 0) return self;

if (mrb_obj_equal(mrb, self, a)) return self;

exc = mrb_obj_clone(mrb, self);

mrb_iv_set(mrb, exc, mrb_intern(mrb, "mesg"), a);

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, E_RUNTIME_ERROR, 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_argv(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, E_RUNTIME_ERROR, "%s", mesg);

}

void

mrb_init_exception(mrb_state *mrb)

{

struct RClass *e;

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_define_class(mrb, "RuntimeError", mrb->eStandardError_class); /* 15.2.28 */

}

mruby/src/error.c at master · Blorgus/mruby · GitHub

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