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ruby/eval.c

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62 KiB
C
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/**********************************************************************
eval.c -
$Author$
created at: Thu Jun 10 14:22:17 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "eval_intern.h"
VALUE proc_invoke(VALUE, VALUE, VALUE, VALUE);
VALUE rb_binding_new();
VALUE rb_f_block_given_p(void);
ID rb_frame_callee(void);
static VALUE rb_frame_self(void);
static ID removed, singleton_removed, undefined, singleton_undefined;
static ID init, eqq, each, aref, aset, match, missing;
static ID added, singleton_added;
static ID object_id, __send__, respond_to;
VALUE rb_eLocalJumpError;
VALUE rb_eSysStackError;
VALUE sysstack_error;
static VALUE exception_error;
static VALUE eval(VALUE, VALUE, VALUE, const char *, int);
static inline VALUE rb_yield_0(int argc, VALUE *argv);
static VALUE rb_call(VALUE, VALUE, ID, int, const VALUE *, int);
#include "eval_error.c"
#include "eval_method.c"
#include "eval_safe.c"
#include "eval_jump.c"
/* initialize ruby */
#if defined(__APPLE__)
#define environ (*_NSGetEnviron())
#elif !defined(_WIN32) && !defined(__MACOS__) || defined(_WIN32_WCE)
extern char **environ;
#endif
char **rb_origenviron;
void rb_clear_trace_func(void);
void rb_thread_stop_timer_thread(void);
void rb_call_inits(void);
void Init_stack(VALUE *);
void Init_heap(void);
void Init_ext(void);
void Init_BareVM(void);
void
ruby_init(void)
{
static int initialized = 0;
int state;
if (initialized)
return;
initialized = 1;
#ifdef __MACOS__
rb_origenviron = 0;
#else
rb_origenviron = environ;
#endif
Init_stack((void *)&state);
Init_BareVM();
Init_heap();
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
rb_call_inits();
#ifdef __MACOS__
_macruby_init();
#elif defined(__VMS)
_vmsruby_init();
#endif
ruby_prog_init();
ALLOW_INTS;
}
POP_TAG();
if (state) {
error_print();
exit(EXIT_FAILURE);
}
ruby_running = 1;
}
extern void rb_clear_trace_func(void);
void *
ruby_options(int argc, char **argv)
{
int state;
void *tree = 0;
Init_stack((void *)&state);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(GET_THREAD(), tree = ruby_process_options(argc, argv));
}
else {
rb_clear_trace_func();
state = error_handle(state);
tree = (void *)INT2FIX(state);
}
POP_TAG();
return tree;
}
static void
ruby_finalize_0(void)
{
rb_clear_trace_func();
PUSH_TAG();
if (EXEC_TAG() == 0) {
rb_trap_exit();
}
POP_TAG();
rb_exec_end_proc();
}
static void
ruby_finalize_1(void)
{
ruby_sig_finalize();
GET_THREAD()->errinfo = Qnil;
rb_gc_call_finalizer_at_exit();
}
void
ruby_finalize(void)
{
ruby_finalize_0();
ruby_finalize_1();
}
void rb_thread_stop_timer_thread(void);
int
ruby_cleanup(int ex)
{
int state;
volatile VALUE errs[2];
rb_thread_t *th = GET_THREAD();
int nerr;
errs[1] = th->errinfo;
th->safe_level = 0;
Init_stack((void *)&state);
ruby_finalize_0();
errs[0] = th->errinfo;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, rb_thread_terminate_all());
}
else if (ex == 0) {
ex = state;
}
th->errinfo = errs[1];
ex = error_handle(ex);
ruby_finalize_1();
POP_TAG();
rb_thread_stop_timer_thread();
for (nerr = 0; nerr < sizeof(errs) / sizeof(errs[0]); ++nerr) {
VALUE err = errs[nerr];
if (!RTEST(err)) continue;
/* th->errinfo contains a NODE while break'ing */
if (TYPE(err) == T_NODE) continue;
if (rb_obj_is_kind_of(err, rb_eSystemExit)) {
return sysexit_status(err);
}
else if (rb_obj_is_kind_of(err, rb_eSignal)) {
VALUE sig = rb_iv_get(err, "signo");
ruby_default_signal(NUM2INT(sig));
}
else if (ex == 0) {
ex = 1;
}
}
#if EXIT_SUCCESS != 0 || EXIT_FAILURE != 1
switch (ex) {
#if EXIT_SUCCESS != 0
case 0: return EXIT_SUCCESS;
#endif
#if EXIT_FAILURE != 1
case 1: return EXIT_FAILURE;
#endif
}
#endif
return ex;
}
int
ruby_exec_node(void *n, char *file)
{
int state;
VALUE val;
NODE *node = n;
rb_thread_t *th = GET_THREAD();
if (!node) return 0;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, {
VALUE iseq = rb_iseq_new(n, rb_str_new2("<main>"),
rb_str_new2(file), Qfalse, ISEQ_TYPE_TOP);
th->base_block = 0;
val = rb_iseq_eval(iseq);
});
}
POP_TAG();
return state;
}
void
ruby_stop(int ex)
{
exit(ruby_cleanup(ex));
}
int
ruby_run_node(void *n)
{
NODE *node = (NODE *)n;
switch ((VALUE)n) {
case Qtrue: return EXIT_SUCCESS;
case Qfalse: return EXIT_FAILURE;
}
if (FIXNUM_P((VALUE)n)) {
return FIX2INT((VALUE)n);
}
Init_stack((void *)&n);
return ruby_cleanup(ruby_exec_node(node, node->nd_file));
}
VALUE
rb_eval_string(const char *str)
{
return eval(rb_vm_top_self(), rb_str_new2(str), Qnil, "(eval)", 1);
}
VALUE
rb_eval_string_protect(const char *str, int *state)
{
return rb_protect((VALUE (*)(VALUE))rb_eval_string, (VALUE)str, state);
}
VALUE
rb_eval_string_wrap(const char *str, int *state)
{
int status;
rb_thread_t *th = GET_THREAD();
VALUE self = th->top_self;
VALUE wrapper = th->top_wrapper;
VALUE val;
th->top_wrapper = rb_module_new();
th->top_self = rb_obj_clone(rb_vm_top_self());
rb_extend_object(th->top_self, th->top_wrapper);
val = rb_eval_string_protect(str, &status);
th->top_self = self;
th->top_wrapper = wrapper;
if (state) {
*state = status;
}
else if (status) {
JUMP_TAG(status);
}
return val;
}
VALUE
rb_eval_cmd(VALUE cmd, VALUE arg, int level)
{
int state;
VALUE val = Qnil; /* OK */
volatile int safe = rb_safe_level();
if (OBJ_TAINTED(cmd)) {
level = 4;
}
if (TYPE(cmd) != T_STRING) {
PUSH_TAG();
rb_set_safe_level_force(level);
if ((state = EXEC_TAG()) == 0) {
val = rb_funcall2(cmd, rb_intern("call"), RARRAY_LEN(arg),
RARRAY_PTR(arg));
}
POP_TAG();
rb_set_safe_level_force(safe);
if (state)
JUMP_TAG(state);
return val;
}
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
val = eval(rb_vm_top_self(), cmd, Qnil, 0, 0);
}
POP_TAG();
rb_set_safe_level_force(safe);
if (state) vm_jump_tag_but_local_jump(state, val);
return val;
}
/*
* call-seq:
* Module.nesting => array
*
* Returns the list of +Modules+ nested at the point of call.
*
* module M1
* module M2
* $a = Module.nesting
* end
* end
* $a #=> [M1::M2, M1]
* $a[0].name #=> "M1::M2"
*/
static VALUE
rb_mod_nesting(void)
{
VALUE ary = rb_ary_new();
NODE *cref = ruby_cref();
while (cref && cref->nd_next) {
VALUE klass = cref->nd_clss;
if (!NIL_P(klass)) {
rb_ary_push(ary, klass);
}
cref = cref->nd_next;
}
return ary;
}
/*
* call-seq:
* Module.constants => array
*
* Returns an array of the names of all constants defined in the
* system. This list includes the names of all modules and classes.
*
* p Module.constants.sort[1..5]
*
* <em>produces:</em>
*
* ["ARGV", "ArgumentError", "Array", "Bignum", "Binding"]
*/
static VALUE
rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
{
NODE *cref = ruby_cref();
VALUE klass;
VALUE cbase = 0;
void *data = 0;
if (argc > 0) {
return rb_mod_constants(argc, argv, rb_cModule);
}
while (cref) {
klass = cref->nd_clss;
if (!NIL_P(klass)) {
data = rb_mod_const_at(cref->nd_clss, data);
if (!cbase) {
cbase = klass;
}
}
cref = cref->nd_next;
}
if (cbase) {
data = rb_mod_const_of(cbase, data);
}
return rb_const_list(data);
}
void
rb_frozen_class_p(VALUE klass)
{
char *desc = "something(?!)";
if (OBJ_FROZEN(klass)) {
if (FL_TEST(klass, FL_SINGLETON))
desc = "object";
else {
switch (TYPE(klass)) {
case T_MODULE:
case T_ICLASS:
desc = "module";
break;
case T_CLASS:
desc = "class";
break;
}
}
rb_error_frozen(desc);
}
}
/*
* call-seq:
* obj.respond_to?(symbol, include_private=false) => true or false
*
* Returns +true+> if _obj_ responds to the given
* method. Private methods are included in the search only if the
* optional second parameter evaluates to +true+.
*/
static NODE *basic_respond_to = 0;
int
rb_obj_respond_to(VALUE obj, ID id, int priv)
{
VALUE klass = CLASS_OF(obj);
if (rb_method_node(klass, respond_to) == basic_respond_to) {
return rb_method_boundp(klass, id, !priv);
}
else {
VALUE args[2];
int n = 0;
args[n++] = ID2SYM(id);
if (priv)
args[n++] = Qtrue;
return rb_funcall2(obj, respond_to, n, args);
}
}
int
rb_respond_to(VALUE obj, ID id)
{
return rb_obj_respond_to(obj, id, Qfalse);
}
/*
* call-seq:
* obj.respond_to?(symbol, include_private=false) => true or false
*
* Returns +true+> if _obj_ responds to the given
* method. Private methods are included in the search only if the
* optional second parameter evaluates to +true+.
*/
static VALUE
obj_respond_to(int argc, VALUE *argv, VALUE obj)
{
VALUE mid, priv;
ID id;
rb_scan_args(argc, argv, "11", &mid, &priv);
id = rb_to_id(mid);
if (rb_method_boundp(CLASS_OF(obj), id, !RTEST(priv))) {
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.method_defined?(symbol) => true or false
*
* Returns +true+ if the named method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors). Public and protected methods are matched.
*
* module A
* def method1() end
* end
* class B
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.method_defined? "method1" #=> true
* C.method_defined? "method2" #=> true
* C.method_defined? "method3" #=> true
* C.method_defined? "method4" #=> false
*/
static VALUE
rb_mod_method_defined(VALUE mod, VALUE mid)
{
return rb_method_boundp(mod, rb_to_id(mid), 1);
}
#define VISI_CHECK(x,f) (((x)&NOEX_MASK) == (f))
/*
* call-seq:
* mod.public_method_defined?(symbol) => true or false
*
* Returns +true+ if the named public method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.public_method_defined? "method1" #=> true
* C.public_method_defined? "method2" #=> false
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_public_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PUBLIC))
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.private_method_defined?(symbol) => true or false
*
* Returns +true+ if the named private method is defined by
* _ mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
*
* module A
* def method1() end
* end
* class B
* private
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.private_method_defined? "method1" #=> false
* C.private_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> false
*/
static VALUE
rb_mod_private_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PRIVATE))
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.protected_method_defined?(symbol) => true or false
*
* Returns +true+ if the named protected method is defined
* by _mod_ (or its included modules and, if _mod_ is a
* class, its ancestors).
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.protected_method_defined? "method1" #=> false
* C.protected_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_protected_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PROTECTED))
return Qtrue;
}
return Qfalse;
}
NORETURN(static void rb_longjmp(int, VALUE));
static VALUE make_backtrace(void);
static void
rb_longjmp(int tag, VALUE mesg)
{
VALUE at;
VALUE e;
rb_thread_t *th = GET_THREAD();
const char *file;
int line = 0;
if (thread_set_raised(th)) {
th->errinfo = exception_error;
JUMP_TAG(TAG_FATAL);
}
if (NIL_P(mesg))
mesg = th->errinfo;
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
}
file = rb_sourcefile();
if (file) line = rb_sourceline();
if (file && !NIL_P(mesg)) {
at = get_backtrace(mesg);
if (NIL_P(at)) {
at = make_backtrace();
set_backtrace(mesg, at);
}
}
if (!NIL_P(mesg)) {
th->errinfo = mesg;
}
if (RTEST(ruby_debug) && !NIL_P(e = th->errinfo) &&
!rb_obj_is_kind_of(e, rb_eSystemExit)) {
int status;
PUSH_TAG();
if ((status = EXEC_TAG()) == 0) {
RB_GC_GUARD(e) = rb_obj_as_string(e);
if (file) {
warn_printf("Exception `%s' at %s:%d - %s\n",
rb_obj_classname(th->errinfo),
file, line, RSTRING_PTR(e));
}
else {
warn_printf("Exception `%s' - %s\n",
rb_obj_classname(th->errinfo),
RSTRING_PTR(e));
}
}
POP_TAG();
if (status == TAG_FATAL && th->errinfo == exception_error) {
th->errinfo = mesg;
}
else if (status) {
thread_reset_raised(th);
JUMP_TAG(status);
}
}
rb_trap_restore_mask();
if (tag != TAG_FATAL) {
EXEC_EVENT_HOOK(th, RUBY_EVENT_RAISE, th->cfp->self,
0 /* TODO: id */, 0 /* TODO: klass */);
}
thread_reset_raised(th);
JUMP_TAG(tag);
}
void
rb_exc_raise(VALUE mesg)
{
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_exc_fatal(VALUE mesg)
{
rb_longjmp(TAG_FATAL, mesg);
}
void
rb_interrupt(void)
{
static const char fmt[1] = {'\0'};
rb_raise(rb_eInterrupt, fmt);
}
static VALUE get_errinfo(void);
/*
* call-seq:
* raise
* raise(string)
* raise(exception [, string [, array]])
* fail
* fail(string)
* fail(exception [, string [, array]])
*
* With no arguments, raises the exception in <code>$!</code> or raises
* a <code>RuntimeError</code> if <code>$!</code> is +nil+.
* With a single +String+ argument, raises a
* +RuntimeError+ with the string as a message. Otherwise,
* the first parameter should be the name of an +Exception+
* class (or an object that returns an +Exception+ object when sent
* an +exception+ message). The optional second parameter sets the
* message associated with the exception, and the third parameter is an
* array of callback information. Exceptions are caught by the
* +rescue+ clause of <code>begin...end</code> blocks.
*
* raise "Failed to create socket"
* raise ArgumentError, "No parameters", caller
*/
static VALUE
rb_f_raise(int argc, VALUE *argv)
{
VALUE err;
if (argc == 0) {
err = get_errinfo();
if (!NIL_P(err)) {
argc = 1;
argv = &err;
}
}
rb_raise_jump(rb_make_exception(argc, argv));
return Qnil; /* not reached */
}
VALUE
rb_make_exception(int argc, VALUE *argv)
{
VALUE mesg;
ID exception;
int n;
mesg = Qnil;
switch (argc) {
case 0:
mesg = Qnil;
break;
case 1:
if (NIL_P(argv[0]))
break;
if (TYPE(argv[0]) == T_STRING) {
mesg = rb_exc_new3(rb_eRuntimeError, argv[0]);
break;
}
n = 0;
goto exception_call;
case 2:
case 3:
n = 1;
exception_call:
exception = rb_intern("exception");
if (!rb_respond_to(argv[0], exception)) {
rb_raise(rb_eTypeError, "exception class/object expected");
}
mesg = rb_funcall(argv[0], exception, n, argv[1]);
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments");
break;
}
if (argc > 0) {
if (!rb_obj_is_kind_of(mesg, rb_eException))
rb_raise(rb_eTypeError, "exception object expected");
if (argc > 2)
set_backtrace(mesg, argv[2]);
}
return mesg;
}
void
rb_raise_jump(VALUE mesg)
{
/* TODO: fix me */
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_jump_tag(int tag)
{
JUMP_TAG(tag);
}
int
rb_block_given_p(void)
{
rb_thread_t *th = GET_THREAD();
if (GC_GUARDED_PTR_REF(th->cfp->lfp[0])) {
return Qtrue;
}
else {
return Qfalse;
}
}
int
rb_iterator_p()
{
return rb_block_given_p();
}
/*
* call-seq:
* block_given? => true or false
* iterator? => true or false
*
* Returns <code>true</code> if <code>yield</code> would execute a
* block in the current context. The <code>iterator?</code> form
* is mildly deprecated.
*
* def try
* if block_given?
* yield
* else
* "no block"
* end
* end
* try #=> "no block"
* try { "hello" } #=> "hello"
* try do "hello" end #=> "hello"
*/
VALUE
rb_f_block_given_p()
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
cfp = vm_get_ruby_level_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
if (GC_GUARDED_PTR_REF(cfp->lfp[0])) {
return Qtrue;
}
else {
return Qfalse;
}
}
VALUE rb_eThreadError;
void
rb_need_block()
{
if (!rb_block_given_p()) {
vm_localjump_error("no block given", Qnil, 0);
}
}
static inline VALUE
rb_yield_0(int argc, VALUE *argv)
{
return vm_yield(GET_THREAD(), argc, argv);
}
VALUE
rb_yield(VALUE val)
{
volatile VALUE tmp = val;
if (val == Qundef) {
tmp = rb_yield_0(0, 0);
}
else {
tmp = rb_yield_0(1, &val);
}
return tmp;
}
VALUE
rb_yield_values(int n, ...)
{
int i;
VALUE *argv;
va_list args;
if (n == 0) {
return rb_yield_0(0, 0);
}
argv = ALLOCA_N(VALUE, n);
va_init_list(args, n);
for (i=0; i<n; i++) {
argv[i] = va_arg(args, VALUE);
}
va_end(args);
return rb_yield_0(n, argv);
}
VALUE
rb_yield_values2(int argc, VALUE *argv)
{
return rb_yield_0(argc, argv);
}
VALUE
rb_yield_splat(VALUE values)
{
VALUE tmp = rb_check_array_type(values);
volatile VALUE v;
if (NIL_P(tmp)) {
rb_raise(rb_eArgError, "not an array");
}
v = rb_yield_0(RARRAY_LEN(tmp), RARRAY_PTR(tmp));
return v;
}
static VALUE
loop_i()
{
for (;;) {
rb_yield_0(0, 0);
}
return Qnil;
}
/*
* call-seq:
* loop {|| block }
*
* Repeatedly executes the block.
*
* loop do
* print "Input: "
* line = gets
* break if !line or line =~ /^qQ/
* # ...
* end
*/
static VALUE
rb_f_loop(void)
{
rb_rescue2(loop_i, (VALUE)0, 0, 0, rb_eStopIteration, (VALUE)0);
return Qnil; /* dummy */
}
VALUE
rb_iterate(VALUE (*it_proc) (VALUE), VALUE data1,
VALUE (*bl_proc) (ANYARGS), VALUE data2)
{
int state;
volatile VALUE retval = Qnil;
NODE *node = NEW_IFUNC(bl_proc, data2);
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
TH_PUSH_TAG(th);
state = TH_EXEC_TAG();
if (state == 0) {
iter_retry:
{
rb_block_t *blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(th->cfp);
blockptr->iseq = (void *)node;
blockptr->proc = 0;
th->passed_block = blockptr;
}
retval = (*it_proc) (data1);
}
else {
VALUE err = th->errinfo;
if (state == TAG_BREAK) {
VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(err);
VALUE *cdfp = cfp->dfp;
if (cdfp == escape_dfp) {
state = 0;
th->state = 0;
th->errinfo = Qnil;
th->cfp = cfp;
}
else{
/* SDR(); printf("%p, %p\n", cdfp, escape_dfp); */
}
}
else if (state == TAG_RETRY) {
VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(err);
VALUE *cdfp = cfp->dfp;
if (cdfp == escape_dfp) {
state = 0;
th->state = 0;
th->errinfo = Qnil;
th->cfp = cfp;
goto iter_retry;
}
}
}
TH_POP_TAG();
switch (state) {
case 0:
break;
default:
TH_JUMP_TAG(th, state);
}
return retval;
}
struct iter_method_arg {
VALUE obj;
ID mid;
int argc;
VALUE *argv;
};
static VALUE
iterate_method(VALUE obj)
{
struct iter_method_arg *arg;
arg = (struct iter_method_arg *)obj;
return rb_call(CLASS_OF(arg->obj), arg->obj, arg->mid,
arg->argc, arg->argv, NOEX_PRIVATE);
}
VALUE
rb_block_call(VALUE obj, ID mid, int argc, VALUE *argv,
VALUE (*bl_proc) (ANYARGS), VALUE data2)
{
struct iter_method_arg arg;
arg.obj = obj;
arg.mid = mid;
arg.argc = argc;
arg.argv = argv;
return rb_iterate(iterate_method, (VALUE)&arg, bl_proc, data2);
}
VALUE
rb_each(VALUE obj)
{
return rb_call(CLASS_OF(obj), obj, rb_intern("each"), 0, 0,
NOEX_PRIVATE);
}
VALUE
rb_rescue2(VALUE (*b_proc) (ANYARGS), VALUE data1, VALUE (*r_proc) (ANYARGS),
VALUE data2, ...)
{
int state;
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
volatile VALUE result;
volatile VALUE e_info = th->errinfo;
va_list args;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
retry_entry:
result = (*b_proc) (data1);
}
else {
th->cfp = cfp; /* restore */
if (state == TAG_RAISE) {
int handle = Qfalse;
VALUE eclass;
va_init_list(args, data2);
while ((eclass = va_arg(args, VALUE)) != 0) {
if (rb_obj_is_kind_of(th->errinfo, eclass)) {
handle = Qtrue;
break;
}
}
va_end(args);
if (handle) {
if (r_proc) {
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
result = (*r_proc) (data2, th->errinfo);
}
POP_TAG();
if (state == TAG_RETRY) {
state = 0;
th->errinfo = Qnil;
goto retry_entry;
}
}
else {
result = Qnil;
state = 0;
}
if (state == 0) {
th->errinfo = e_info;
}
}
}
}
POP_TAG();
if (state)
JUMP_TAG(state);
return result;
}
VALUE
rb_rescue(VALUE (*b_proc)(ANYARGS), VALUE data1, VALUE (*r_proc)(ANYARGS), VALUE data2)
{
return rb_rescue2(b_proc, data1, r_proc, data2, rb_eStandardError,
(VALUE)0);
}
VALUE
rb_protect(VALUE (*proc) (VALUE), VALUE data, int *state)
{
VALUE result = Qnil; /* OK */
int status;
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
struct rb_vm_trap_tag trap_tag;
rb_jmpbuf_t org_jmpbuf;
trap_tag.prev = th->trap_tag;
PUSH_TAG();
th->trap_tag = &trap_tag;
MEMCPY(&org_jmpbuf, &(th)->root_jmpbuf, rb_jmpbuf_t, 1);
if ((status = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, result = (*proc) (data));
}
MEMCPY(&(th)->root_jmpbuf, &org_jmpbuf, rb_jmpbuf_t, 1);
th->trap_tag = trap_tag.prev;
POP_TAG();
if (state) {
*state = status;
}
if (status != 0) {
th->cfp = cfp;
return Qnil;
}
return result;
}
VALUE
rb_ensure(VALUE (*b_proc)(ANYARGS), VALUE data1, VALUE (*e_proc)(ANYARGS), VALUE data2)
{
int state;
volatile VALUE result = Qnil;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
result = (*b_proc) (data1);
}
POP_TAG();
/* TODO: fix me */
/* retval = prot_tag ? prot_tag->retval : Qnil; */ /* save retval */
(*e_proc) (data2);
if (state)
JUMP_TAG(state);
return result;
}
VALUE
rb_with_disable_interrupt(VALUE (*proc)(ANYARGS), VALUE data)
{
VALUE result = Qnil; /* OK */
int status;
DEFER_INTS;
{
int thr_critical = rb_thread_critical;
rb_thread_critical = Qtrue;
PUSH_TAG();
if ((status = EXEC_TAG()) == 0) {
result = (*proc) (data);
}
POP_TAG();
rb_thread_critical = thr_critical;
}
ENABLE_INTS;
if (status)
JUMP_TAG(status);
return result;
}
static inline void
stack_check(void)
{
static int overflowing = 0;
if (!overflowing && ruby_stack_check()) {
int state;
overflowing = 1;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
rb_exc_raise(sysstack_error);
}
POP_TAG();
overflowing = 0;
JUMP_TAG(state);
}
}
/*
* call-seq:
* obj.method_missing(symbol [, *args] ) => result
*
* Invoked by Ruby when <i>obj</i> is sent a message it cannot handle.
* <i>symbol</i> is the symbol for the method called, and <i>args</i>
* are any arguments that were passed to it. By default, the interpreter
* raises an error when this method is called. However, it is possible
* to override the method to provide more dynamic behavior.
* If it is decided that a particular method should not be handled, then
* <i>super</i> should be called, so that ancestors can pick up the
* missing method.
* The example below creates
* a class <code>Roman</code>, which responds to methods with names
* consisting of roman numerals, returning the corresponding integer
* values.
*
* class Roman
* def romanToInt(str)
* # ...
* end
* def method_missing(methId)
* str = methId.id2name
* romanToInt(str)
* end
* end
*
* r = Roman.new
* r.iv #=> 4
* r.xxiii #=> 23
* r.mm #=> 2000
*/
static VALUE
rb_method_missing(int argc, const VALUE *argv, VALUE obj)
{
ID id;
VALUE exc = rb_eNoMethodError;
char *format = 0;
rb_thread_t *th = GET_THREAD();
int last_call_status = th->method_missing_reason;
if (argc == 0 || !SYMBOL_P(argv[0])) {
rb_raise(rb_eArgError, "no id given");
}
stack_check();
id = SYM2ID(argv[0]);
if (last_call_status & NOEX_PRIVATE) {
format = "private method `%s' called for %s";
}
else if (last_call_status & NOEX_PROTECTED) {
format = "protected method `%s' called for %s";
}
else if (last_call_status & NOEX_VCALL) {
format = "undefined local variable or method `%s' for %s";
exc = rb_eNameError;
}
else if (last_call_status & NOEX_SUPER) {
format = "super: no superclass method `%s' for %s";
}
if (!format) {
format = "undefined method `%s' for %s";
}
{
int n = 0;
VALUE args[3];
args[n++] = rb_funcall(rb_const_get(exc, rb_intern("message")), '!',
3, rb_str_new2(format), obj, argv[0]);
args[n++] = argv[0];
if (exc == rb_eNoMethodError) {
args[n++] = rb_ary_new4(argc - 1, argv + 1);
}
exc = rb_class_new_instance(n, args, exc);
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
rb_exc_raise(exc);
}
return Qnil; /* not reached */
}
static VALUE
method_missing(VALUE obj, ID id, int argc, const VALUE *argv, int call_status)
{
VALUE *nargv;
GET_THREAD()->method_missing_reason = call_status;
if (id == missing) {
rb_method_missing(argc, argv, obj);
}
else if (id == ID_ALLOCATOR) {
rb_raise(rb_eTypeError, "allocator undefined for %s",
rb_class2name(obj));
}
nargv = ALLOCA_N(VALUE, argc + 1);
nargv[0] = ID2SYM(id);
MEMCPY(nargv + 1, argv, VALUE, argc);
return rb_funcall2(obj, missing, argc + 1, nargv);
}
static VALUE
rb_call0(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int scope, VALUE self)
{
NODE *body, *method;
int noex;
ID id = mid;
struct cache_entry *ent;
rb_thread_t *th = GET_THREAD();
if (!klass) {
rb_raise(rb_eNotImpError,
"method `%s' called on terminated object (%p)",
rb_id2name(mid), (void *)recv);
}
/* is it in the method cache? */
ent = cache + EXPR1(klass, mid);
if (ent->mid == mid && ent->klass == klass) {
if (!ent->method)
return method_missing(recv, mid, argc, argv,
scope == 2 ? NOEX_VCALL : 0);
id = ent->mid0;
noex = ent->method->nd_noex;
klass = ent->method->nd_clss;
body = ent->method->nd_body;
}
else if ((method = rb_get_method_body(klass, id, &id)) != 0) {
noex = method->nd_noex;
klass = method->nd_clss;
body = method->nd_body;
}
else {
if (scope == 3) {
return method_missing(recv, mid, argc, argv, NOEX_SUPER);
}
return method_missing(recv, mid, argc, argv,
scope == 2 ? NOEX_VCALL : 0);
}
if (mid != missing) {
/* receiver specified form for private method */
if (UNLIKELY(noex)) {
if (((noex & NOEX_MASK) & NOEX_PRIVATE) && scope == 0) {
return method_missing(recv, mid, argc, argv, NOEX_PRIVATE);
}
/* self must be kind of a specified form for protected method */
if (((noex & NOEX_MASK) & NOEX_PROTECTED) && scope == 0) {
VALUE defined_class = klass;
if (TYPE(defined_class) == T_ICLASS) {
defined_class = RBASIC(defined_class)->klass;
}
if (!rb_obj_is_kind_of(self, rb_class_real(defined_class))) {
return method_missing(recv, mid, argc, argv, NOEX_PROTECTED);
}
}
if (NOEX_SAFE(noex) > th->safe_level) {
rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(mid));
}
}
}
{
VALUE val;
/*
//static int level;
//int i;
//for(i=0; i<level; i++){printf(" ");}
//printf("invoke %s (%s)\n", rb_id2name(mid), ruby_node_name(nd_type(body)));
//level++;
//printf("%s with %d args\n", rb_id2name(mid), argc);
*/
val = vm_call0(th, klass, recv, mid, id, argc, argv, body,
noex & NOEX_NOSUPER);
/*
//level--;
//for(i=0; i<level; i++){printf(" ");}
//printf("done %s (%s)\n", rb_id2name(mid), ruby_node_name(nd_type(body)));
*/
return val;
}
}
static VALUE
rb_call(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int scope)
{
return rb_call0(klass, recv, mid, argc, argv, scope, rb_frame_self());
}
VALUE
rb_apply(VALUE recv, ID mid, VALUE args)
{
int argc;
VALUE *argv;
argc = RARRAY_LEN(args); /* Assigns LONG, but argc is INT */
argv = ALLOCA_N(VALUE, argc);
MEMCPY(argv, RARRAY_PTR(args), VALUE, argc);
return rb_call(CLASS_OF(recv), recv, mid, argc, argv, NOEX_NOSUPER);
}
static VALUE
send_internal(int argc, VALUE *argv, VALUE recv, int scope)
{
VALUE vid;
VALUE self = RUBY_VM_PREVIOUS_CONTROL_FRAME(GET_THREAD()->cfp)->self;
if (argc == 0) {
rb_raise(rb_eArgError, "no method name given");
}
vid = *argv++; argc--;
PASS_PASSED_BLOCK();
return rb_call0(CLASS_OF(recv), recv, rb_to_id(vid), argc, argv, scope, self);
}
/*
* call-seq:
* obj.send(symbol [, args...]) => obj
* obj.__send__(symbol [, args...]) => obj
*
* Invokes the method identified by _symbol_, passing it any
* arguments specified. You can use <code>__send__</code> if the name
* +send+ clashes with an existing method in _obj_.
*
* class Klass
* def hello(*args)
* "Hello " + args.join(' ')
* end
* end
* k = Klass.new
* k.send :hello, "gentle", "readers" #=> "Hello gentle readers"
*/
VALUE
rb_f_send(int argc, VALUE *argv, VALUE recv)
{
return send_internal(argc, argv, recv, NOEX_NOSUPER | NOEX_PRIVATE);
}
/*
* call-seq:
* obj.public_send(symbol [, args...]) => obj
*
* Invokes the method identified by _symbol_, passing it any
* arguments specified. Unlike send, public_send calls public
* methods only.
*
* 1.public_send(:puts, "hello") # causes NoMethodError
*/
VALUE
rb_f_public_send(int argc, VALUE *argv, VALUE recv)
{
return send_internal(argc, argv, recv, NOEX_PUBLIC);
}
VALUE
rb_funcall(VALUE recv, ID mid, int n, ...)
{
VALUE *argv;
va_list ar;
va_init_list(ar, n);
if (n > 0) {
long i;
argv = ALLOCA_N(VALUE, n);
for (i = 0; i < n; i++) {
argv[i] = va_arg(ar, VALUE);
}
va_end(ar);
}
else {
argv = 0;
}
return rb_call(CLASS_OF(recv), recv, mid, n, argv,
NOEX_NOSUPER | NOEX_PRIVATE);
}
VALUE
rb_funcall2(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_call(CLASS_OF(recv), recv, mid, argc, argv,
NOEX_NOSUPER | NOEX_PRIVATE);
}
VALUE
rb_funcall3(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_call(CLASS_OF(recv), recv, mid, argc, argv, NOEX_PUBLIC);
}
static VALUE
backtrace(int lev)
{
return vm_backtrace(GET_THREAD(), lev);
}
/*
* call-seq:
* caller(start=1) => array
*
* Returns the current execution stack---an array containing strings in
* the form ``<em>file:line</em>'' or ``<em>file:line: in
* `method'</em>''. The optional _start_ parameter
* determines the number of initial stack entries to omit from the
* result.
*
* def a(skip)
* caller(skip)
* end
* def b(skip)
* a(skip)
* end
* def c(skip)
* b(skip)
* end
* c(0) #=> ["prog:2:in `a'", "prog:5:in `b'", "prog:8:in `c'", "prog:10"]
* c(1) #=> ["prog:5:in `b'", "prog:8:in `c'", "prog:11"]
* c(2) #=> ["prog:8:in `c'", "prog:12"]
* c(3) #=> ["prog:13"]
*/
static VALUE
rb_f_caller(int argc, VALUE *argv)
{
VALUE level;
int lev;
rb_scan_args(argc, argv, "01", &level);
if (NIL_P(level))
lev = 1;
else
lev = NUM2INT(level);
if (lev < 0)
rb_raise(rb_eArgError, "negative level (%d)", lev);
return backtrace(lev);
}
void
rb_backtrace(void)
{
long i;
VALUE ary;
ary = backtrace(-1);
for (i = 0; i < RARRAY_LEN(ary); i++) {
printf("\tfrom %s\n", RSTRING_PTR(RARRAY_PTR(ary)[i]));
}
}
static VALUE
make_backtrace(void)
{
return backtrace(-1);
}
static ID
frame_func_id(rb_control_frame_t *cfp)
{
rb_iseq_t *iseq = cfp->iseq;
if (!iseq) {
return cfp->method_id;
}
while (iseq) {
if (RUBY_VM_IFUNC_P(iseq)) {
return rb_intern("<ifunc>");
}
if (iseq->defined_method_id) {
return iseq->defined_method_id;
}
if (iseq->local_iseq == iseq) {
break;
}
iseq = iseq->parent_iseq;
}
return 0;
}
ID
rb_frame_this_func(void)
{
return frame_func_id(GET_THREAD()->cfp);
}
ID
rb_frame_callee(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
/* check if prev_cfp can be accessible */
if ((void *)(th->stack + th->stack_size) == (void *)(prev_cfp)) {
return 0;
}
return frame_func_id(prev_cfp);
}
void
rb_frame_pop(void)
{
rb_thread_t *th = GET_THREAD();
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
}
static VALUE
rb_frame_self(void)
{
return GET_THREAD()->cfp->self;
}
static VALUE
eval(VALUE self, VALUE src, VALUE scope, const char *file, int line)
{
int state;
VALUE result = Qundef;
VALUE envval;
rb_binding_t *bind = 0;
rb_thread_t *th = GET_THREAD();
rb_env_t *env = NULL;
NODE *stored_cref_stack = 0;
if (file == 0) {
file = rb_sourcefile();
line = rb_sourceline();
}
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
rb_iseq_t *iseq;
volatile VALUE iseqval;
if (scope != Qnil) {
if (CLASS_OF(scope) == rb_cBinding) {
GetBindingPtr(scope, bind);
envval = bind->env;
stored_cref_stack = bind->cref_stack;
}
else {
rb_raise(rb_eTypeError,
"wrong argument type %s (expected Binding)",
rb_obj_classname(scope));
}
GetEnvPtr(envval, env);
th->base_block = &env->block;
}
else {
rb_control_frame_t *cfp = vm_get_ruby_level_cfp(th, th->cfp);
th->base_block = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
th->base_block->iseq = cfp->iseq; /* TODO */
}
/* make eval iseq */
th->parse_in_eval++;
iseqval = rb_iseq_compile(src, rb_str_new2(file), INT2FIX(line));
th->parse_in_eval--;
rb_vm_set_eval_stack(th, iseqval);
th->base_block = 0;
if (0) { /* for debug */
extern VALUE ruby_iseq_disasm(VALUE);
printf("%s\n", RSTRING_PTR(ruby_iseq_disasm(iseqval)));
}
/* save new env */
GetISeqPtr(iseqval, iseq);
if (bind && iseq->local_size > 0) {
bind->env = vm_make_env_object(th, th->cfp);
}
/* push tag */
if (stored_cref_stack) {
stored_cref_stack =
vm_set_special_cref(th, env->block.lfp, stored_cref_stack);
}
/* kick */
CHECK_STACK_OVERFLOW(th->cfp, iseq->stack_max);
result = vm_eval_body(th);
}
POP_TAG();
if (stored_cref_stack) {
vm_set_special_cref(th, env->block.lfp, stored_cref_stack);
}
if (state) {
if (state == TAG_RAISE) {
VALUE errinfo = th->errinfo;
if (strcmp(file, "(eval)") == 0) {
VALUE mesg, errat, bt2;
errat = get_backtrace(errinfo);
mesg = rb_attr_get(errinfo, rb_intern("mesg"));
if (!NIL_P(errat) && TYPE(errat) == T_ARRAY &&
(bt2 = backtrace(-2), RARRAY_LEN(bt2) > 0)) {
if (!NIL_P(mesg) && TYPE(mesg) == T_STRING && !RSTRING_LEN(mesg)) {
rb_str_update(mesg, 0, 0, rb_str_new2(": "));
rb_str_update(mesg, 0, 0, RARRAY_PTR(errat)[0]);
}
RARRAY_PTR(errat)[0] = RARRAY_PTR(bt2)[0];
}
}
rb_exc_raise(errinfo);
}
JUMP_TAG(state);
}
return result;
}
/*
* call-seq:
* eval(string [, binding [, filename [,lineno]]]) => obj
*
* Evaluates the Ruby expression(s) in <em>string</em>. If
* <em>binding</em> is given, the evaluation is performed in its
* context. The binding may be a <code>Binding</code> object or a
* <code>Proc</code> object. If the optional <em>filename</em> and
* <em>lineno</em> parameters are present, they will be used when
* reporting syntax errors.
*
* def getBinding(str)
* return binding
* end
* str = "hello"
* eval "str + ' Fred'" #=> "hello Fred"
* eval "str + ' Fred'", getBinding("bye") #=> "bye Fred"
*/
VALUE
rb_f_eval(int argc, VALUE *argv, VALUE self)
{
VALUE src, scope, vfile, vline;
char *file = "(eval)";
int line = 1;
rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline);
if (rb_safe_level() >= 4) {
StringValue(src);
if (!NIL_P(scope) && !OBJ_TAINTED(scope)) {
rb_raise(rb_eSecurityError,
"Insecure: can't modify trusted binding");
}
}
else {
SafeStringValue(src);
}
if (argc >= 3) {
StringValue(vfile);
}
if (argc >= 4) {
line = NUM2INT(vline);
}
if (!NIL_P(vfile))
file = RSTRING_PTR(vfile);
return eval(self, src, scope, file, line);
}
VALUE vm_cfp_svar_get(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key);
void vm_cfp_svar_set(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key, VALUE val);
/* function to call func under the specified class/module context */
static VALUE
exec_under(VALUE (*func) (VALUE), VALUE under, VALUE self, VALUE args)
{
VALUE val = Qnil; /* OK */
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
rb_control_frame_t *pcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
VALUE stored_self = pcfp->self;
NODE *stored_cref = 0;
rb_block_t block;
rb_block_t *blockptr;
int state;
/* replace environment */
pcfp->self = self;
if ((blockptr = GC_GUARDED_PTR_REF(*th->cfp->lfp)) != 0) {
/* copy block info */
/* TODO: why? */
block = *blockptr;
block.self = self;
*th->cfp->lfp = GC_GUARDED_PTR(&block);
}
while (!RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
stored_cref = (NODE *)vm_cfp_svar_get(th, cfp, 2);
vm_cfp_svar_set(th, cfp, 2, (VALUE)vm_cref_push(th, under, NOEX_PUBLIC));
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
val = (*func) (args);
}
POP_TAG();
/* restore environment */
vm_cfp_svar_set(th, cfp, 2, (VALUE)stored_cref);
pcfp->self = stored_self;
if (state) {
JUMP_TAG(state);
}
return val;
}
static VALUE
yield_under_i(VALUE arg)
{
if (arg == Qundef) {
return rb_yield_0(0, 0);
}
else {
return rb_yield_0(RARRAY_LEN(arg), RARRAY_PTR(arg));
}
}
/* block eval under the class/module context */
static VALUE
yield_under(VALUE under, VALUE self, VALUE values)
{
return exec_under(yield_under_i, under, self, values);
}
static VALUE
eval_under_i(VALUE arg)
{
VALUE *args = (VALUE *)arg;
return eval(args[0], args[1], Qnil, (char *)args[2], (int)args[3]);
}
/* string eval under the class/module context */
static VALUE
eval_under(VALUE under, VALUE self, VALUE src, const char *file, int line)
{
VALUE args[4];
if (rb_safe_level() >= 4) {
StringValue(src);
}
else {
SafeStringValue(src);
}
args[0] = self;
args[1] = src;
args[2] = (VALUE)file;
args[3] = (VALUE)line;
return exec_under(eval_under_i, under, self, (VALUE)args);
}
static VALUE
specific_eval(int argc, VALUE *argv, VALUE klass, VALUE self)
{
if (rb_block_given_p()) {
if (argc > 0) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)",
argc);
}
return yield_under(klass, self, Qundef);
}
else {
char *file = "(eval)";
int line = 1;
if (argc == 0) {
rb_raise(rb_eArgError, "block not supplied");
}
else {
if (rb_safe_level() >= 4) {
StringValue(argv[0]);
}
else {
SafeStringValue(argv[0]);
}
if (argc > 3) {
const char *name = rb_id2name(rb_frame_callee());
rb_raise(rb_eArgError,
"wrong number of arguments: %s(src) or %s{..}",
name, name);
}
if (argc > 2)
line = NUM2INT(argv[2]);
if (argc > 1) {
file = StringValuePtr(argv[1]);
}
}
return eval_under(klass, self, argv[0], file, line);
}
}
/*
* call-seq:
* obj.instance_eval(string [, filename [, lineno]] ) => obj
* obj.instance_eval {| | block } => obj
*
* Evaluates a string containing Ruby source code, or the given block,
* within the context of the receiver (_obj_). In order to set the
* context, the variable +self+ is set to _obj_ while
* the code is executing, giving the code access to _obj_'s
* instance variables. In the version of <code>instance_eval</code>
* that takes a +String+, the optional second and third
* parameters supply a filename and starting line number that are used
* when reporting compilation errors.
*
* class Klass
* def initialize
* @secret = 99
* end
* end
* k = Klass.new
* k.instance_eval { @secret } #=> 99
*/
VALUE
rb_obj_instance_eval(int argc, VALUE *argv, VALUE self)
{
VALUE klass;
if (SPECIAL_CONST_P(self)) {
klass = CLASS_OF(self); //klass = Qnil;
}
else {
klass = rb_singleton_class(self);
}
return specific_eval(argc, argv, klass, self);
}
/*
* call-seq:
* obj.instance_exec(arg...) {|var...| block } => obj
*
* Executes the given block within the context of the receiver
* (_obj_). In order to set the context, the variable +self+ is set
* to _obj_ while the code is executing, giving the code access to
* _obj_'s instance variables. Arguments are passed as block parameters.
*
* class Klass
* def initialize
* @secret = 99
* end
* end
* k = Klass.new
* k.instance_exec(5) {|x| @secret+x } #=> 104
*/
VALUE
rb_obj_instance_exec(int argc, VALUE *argv, VALUE self)
{
VALUE klass;
if (SPECIAL_CONST_P(self)) {
klass = Qnil;
}
else {
klass = rb_singleton_class(self);
}
return yield_under(klass, self, rb_ary_new4(argc, argv));
}
/*
* call-seq:
* mod.class_eval(string [, filename [, lineno]]) => obj
* mod.module_eval {|| block } => obj
*
* Evaluates the string or block in the context of _mod_. This can
* be used to add methods to a class. <code>module_eval</code> returns
* the result of evaluating its argument. The optional _filename_
* and _lineno_ parameters set the text for error messages.
*
* class Thing
* end
* a = %q{def hello() "Hello there!" end}
* Thing.module_eval(a)
* puts Thing.new.hello()
* Thing.module_eval("invalid code", "dummy", 123)
*
* <em>produces:</em>
*
* Hello there!
* dummy:123:in `module_eval': undefined local variable
* or method `code' for Thing:Class
*/
VALUE
rb_mod_module_eval(int argc, VALUE *argv, VALUE mod)
{
return specific_eval(argc, argv, mod, mod);
}
/*
* call-seq:
* mod.module_exec(arg...) {|var...| block } => obj
* mod.class_exec(arg...) {|var...| block } => obj
*
* Evaluates the given block in the context of the class/module.
* The method defined in the block will belong to the receiver.
*
* class Thing
* end
* Thing.class_exec{
* def hello() "Hello there!" end
* }
* puts Thing.new.hello()
*
* <em>produces:</em>
*
* Hello there!
*/
VALUE
rb_mod_module_exec(int argc, VALUE *argv, VALUE mod)
{
return yield_under(mod, mod, rb_ary_new4(argc, argv));
}
static void
secure_visibility(VALUE self)
{
if (rb_safe_level() >= 4 && !OBJ_TAINTED(self)) {
rb_raise(rb_eSecurityError,
"Insecure: can't change method visibility");
}
}
static void
set_method_visibility(VALUE self, int argc, VALUE *argv, ID ex)
{
int i;
secure_visibility(self);
for (i = 0; i < argc; i++) {
rb_export_method(self, rb_to_id(argv[i]), ex);
}
rb_clear_cache_by_class(self);
}
/*
* call-seq:
* public => self
* public(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
*/
static VALUE
rb_mod_public(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PUBLIC);
}
else {
set_method_visibility(module, argc, argv, NOEX_PUBLIC);
}
return module;
}
/*
* call-seq:
* protected => self
* protected(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to protected. With arguments, sets the named methods
* to have protected visibility.
*/
static VALUE
rb_mod_protected(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PROTECTED);
}
else {
set_method_visibility(module, argc, argv, NOEX_PROTECTED);
}
return module;
}
/*
* call-seq:
* private => self
* private(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to private. With arguments, sets the named methods
* to have private visibility.
*
* module Mod
* def a() end
* def b() end
* private
* def c() end
* private :a
* end
* Mod.private_instance_methods #=> ["a", "c"]
*/
static VALUE
rb_mod_private(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PRIVATE);
}
else {
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
}
return module;
}
/*
* call-seq:
* mod.public_class_method(symbol, ...) => mod
*
* Makes a list of existing class methods public.
*/
static VALUE
rb_mod_public_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PUBLIC);
return obj;
}
/*
* call-seq:
* mod.private_class_method(symbol, ...) => mod
*
* Makes existing class methods private. Often used to hide the default
* constructor <code>new</code>.
*
* class SimpleSingleton # Not thread safe
* private_class_method :new
* def SimpleSingleton.create(*args, &block)
* @me = new(*args, &block) if ! @me
* @me
* end
* end
*/
static VALUE
rb_mod_private_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PRIVATE);
return obj;
}
/*
* call-seq:
* public
* public(symbol, ...)
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
*/
static VALUE
top_public(int argc, VALUE *argv)
{
return rb_mod_public(argc, argv, rb_cObject);
}
static VALUE
top_private(int argc, VALUE *argv)
{
return rb_mod_private(argc, argv, rb_cObject);
}
/*
* call-seq:
* module_function(symbol, ...) => self
*
* Creates module functions for the named methods. These functions may
* be called with the module as a receiver, and also become available
* as instance methods to classes that mix in the module. Module
* functions are copies of the original, and so may be changed
* independently. The instance-method versions are made private. If
* used with no arguments, subsequently defined methods become module
* functions.
*
* module Mod
* def one
* "This is one"
* end
* module_function :one
* end
* class Cls
* include Mod
* def callOne
* one
* end
* end
* Mod.one #=> "This is one"
* c = Cls.new
* c.callOne #=> "This is one"
* module Mod
* def one
* "This is the new one"
* end
* end
* Mod.one #=> "This is one"
* c.callOne #=> "This is the new one"
*/
static VALUE
rb_mod_modfunc(int argc, VALUE *argv, VALUE module)
{
int i;
ID id;
NODE *fbody;
if (TYPE(module) != T_MODULE) {
rb_raise(rb_eTypeError, "module_function must be called for modules");
}
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_MODFUNC);
return module;
}
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
for (i = 0; i < argc; i++) {
VALUE m = module;
id = rb_to_id(argv[i]);
for (;;) {
fbody = search_method(m, id, &m);
if (fbody == 0) {
fbody = search_method(rb_cObject, id, &m);
}
if (fbody == 0 || fbody->nd_body == 0) {
rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
}
if (nd_type(fbody->nd_body->nd_body) != NODE_ZSUPER) {
break; /* normal case: need not to follow 'super' link */
}
m = RCLASS_SUPER(m);
if (!m)
break;
}
rb_add_method(rb_singleton_class(module), id, fbody->nd_body->nd_body,
NOEX_PUBLIC);
}
return module;
}
/*
* call-seq:
* append_features(mod) => mod
*
* When this module is included in another, Ruby calls
* <code>append_features</code> in this module, passing it the
* receiving module in _mod_. Ruby's default implementation is
* to add the constants, methods, and module variables of this module
* to _mod_ if this module has not already been added to
* _mod_ or one of its ancestors. See also <code>Module#include</code>.
*/
static VALUE
rb_mod_append_features(VALUE module, VALUE include)
{
switch (TYPE(include)) {
case T_CLASS:
case T_MODULE:
break;
default:
Check_Type(include, T_CLASS);
break;
}
rb_include_module(include, module);
return module;
}
/*
* call-seq:
* include(module, ...) => self
*
* Invokes <code>Module.append_features</code> on each parameter in turn.
*/
static VALUE
rb_mod_include(int argc, VALUE *argv, VALUE module)
{
int i;
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], rb_intern("append_features"), 1, module);
rb_funcall(argv[argc], rb_intern("included"), 1, module);
}
return module;
}
void
rb_obj_call_init(VALUE obj, int argc, VALUE *argv)
{
PASS_PASSED_BLOCK();
rb_funcall2(obj, init, argc, argv);
}
void
rb_extend_object(VALUE obj, VALUE module)
{
rb_include_module(rb_singleton_class(obj), module);
}
/*
* call-seq:
* extend_object(obj) => obj
*
* Extends the specified object by adding this module's constants and
* methods (which are added as singleton methods). This is the callback
* method used by <code>Object#extend</code>.
*
* module Picky
* def Picky.extend_object(o)
* if String === o
* puts "Can't add Picky to a String"
* else
* puts "Picky added to #{o.class}"
* super
* end
* end
* end
* (s = Array.new).extend Picky # Call Object.extend
* (s = "quick brown fox").extend Picky
*
* <em>produces:</em>
*
* Picky added to Array
* Can't add Picky to a String
*/
static VALUE
rb_mod_extend_object(VALUE mod, VALUE obj)
{
rb_extend_object(obj, mod);
return obj;
}
/*
* call-seq:
* obj.extend(module, ...) => obj
*
* Adds to _obj_ the instance methods from each module given as a
* parameter.
*
* module Mod
* def hello
* "Hello from Mod.\n"
* end
* end
*
* class Klass
* def hello
* "Hello from Klass.\n"
* end
* end
*
* k = Klass.new
* k.hello #=> "Hello from Klass.\n"
* k.extend(Mod) #=> #<Klass:0x401b3bc8>
* k.hello #=> "Hello from Mod.\n"
*/
static VALUE
rb_obj_extend(int argc, VALUE *argv, VALUE obj)
{
int i;
if (argc == 0) {
rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
}
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], rb_intern("extend_object"), 1, obj);
rb_funcall(argv[argc], rb_intern("extended"), 1, obj);
}
return obj;
}
/*
* call-seq:
* include(module, ...) => self
*
* Invokes <code>Module.append_features</code>
* on each parameter in turn. Effectively adds the methods and constants
* in each module to the receiver.
*/
static VALUE
top_include(int argc, VALUE *argv, VALUE self)
{
rb_thread_t *th = GET_THREAD();
rb_secure(4);
if (th->top_wrapper) {
rb_warning
("main#include in the wrapped load is effective only in wrapper module");
return rb_mod_include(argc, argv, th->top_wrapper);
}
return rb_mod_include(argc, argv, rb_cObject);
}
VALUE rb_f_trace_var();
VALUE rb_f_untrace_var();
static VALUE *
errinfo_place(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
rb_control_frame_t *end_cfp = RUBY_VM_END_CONTROL_FRAME(th);
while (RUBY_VM_VALID_CONTROL_FRAME_P(cfp, end_cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
if (cfp->iseq->type == ISEQ_TYPE_RESCUE) {
return &cfp->dfp[-1];
}
else if (cfp->iseq->type == ISEQ_TYPE_ENSURE &&
TYPE(cfp->dfp[-1]) != T_NODE &&
!FIXNUM_P(cfp->dfp[-1])) {
return &cfp->dfp[-1];
}
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
static VALUE
get_errinfo(void)
{
VALUE *ptr = errinfo_place();
if (ptr) {
return *ptr;
}
else {
return Qnil;
}
}
static VALUE
errinfo_getter(ID id)
{
return get_errinfo();
}
#if 0
static void
errinfo_setter(VALUE val, ID id, VALUE *var)
{
if (!NIL_P(val) && !rb_obj_is_kind_of(val, rb_eException)) {
rb_raise(rb_eTypeError, "assigning non-exception to $!");
}
else {
VALUE *ptr = errinfo_place();
if (ptr) {
*ptr = val;
}
else {
rb_raise(rb_eRuntimeError, "errinfo_setter: not in rescue clause.");
}
}
}
#endif
VALUE
rb_errinfo(void)
{
rb_thread_t *th = GET_THREAD();
return th->errinfo;
}
void
rb_set_errinfo(VALUE err)
{
if (!NIL_P(err) && !rb_obj_is_kind_of(err, rb_eException)) {
rb_raise(rb_eTypeError, "assigning non-exception to $!");
}
GET_THREAD()->errinfo = err;
}
VALUE
rb_rubylevel_errinfo(void)
{
return get_errinfo();
}
static VALUE
errat_getter(ID id)
{
VALUE err = get_errinfo();
if (!NIL_P(err)) {
return get_backtrace(err);
}
else {
return Qnil;
}
}
static void
errat_setter(VALUE val, ID id, VALUE *var)
{
VALUE err = get_errinfo();
if (NIL_P(err)) {
rb_raise(rb_eArgError, "$! not set");
}
set_backtrace(err, val);
}
int vm_collect_local_variables_in_heap(rb_thread_t *th, VALUE *dfp, VALUE ary);
/*
* call-seq:
* local_variables => array
*
* Returns the names of the current local variables.
*
* fred = 1
* for i in 1..10
* # ...
* end
* local_variables #=> ["fred", "i"]
*/
static VALUE
rb_f_local_variables(void)
{
VALUE ary = rb_ary_new();
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp =
vm_get_ruby_level_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp));
int i;
while (1) {
if (cfp->iseq) {
for (i = 0; i < cfp->iseq->local_table_size; i++) {
ID lid = cfp->iseq->local_table[i];
if (lid) {
const char *vname = rb_id2name(lid);
/* should skip temporary variable */
if (vname) {
rb_ary_push(ary, rb_str_new2(vname));
}
}
}
}
if (cfp->lfp != cfp->dfp) {
/* block */
VALUE *dfp = GC_GUARDED_PTR_REF(cfp->dfp[0]);
if (vm_collect_local_variables_in_heap(th, dfp, ary)) {
break;
}
else {
while (cfp->dfp != dfp) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
}
else {
break;
}
}
return ary;
}
/*
* call-seq:
* __method__ => symbol
* __callee__ => symbol
*
* Returns the name of the current method as a Symbol.
* If called outside of a method, it returns <code>nil</code>.
*
*/
static VALUE
rb_f_method_name(void)
{
ID fname = rb_frame_callee();
if (fname) {
return ID2SYM(fname);
}
else {
return Qnil;
}
}
void
Init_eval(void)
{
/* TODO: fix position */
GET_THREAD()->vm->mark_object_ary = rb_ary_new();
init = rb_intern("initialize");
eqq = rb_intern("===");
each = rb_intern("each");
aref = rb_intern("[]");
aset = rb_intern("[]=");
match = rb_intern("=~");
missing = rb_intern("method_missing");
added = rb_intern("method_added");
singleton_added = rb_intern("singleton_method_added");
removed = rb_intern("method_removed");
singleton_removed = rb_intern("singleton_method_removed");
undefined = rb_intern("method_undefined");
singleton_undefined = rb_intern("singleton_method_undefined");
object_id = rb_intern("object_id");
__send__ = rb_intern("__send__");
rb_define_virtual_variable("$@", errat_getter, errat_setter);
rb_define_virtual_variable("$!", errinfo_getter, 0);
rb_define_private_method(rb_cBasicObject, "method_missing", rb_method_missing, -1);
rb_define_global_function("eval", rb_f_eval, -1);
rb_define_global_function("iterator?", rb_f_block_given_p, 0);
rb_define_global_function("block_given?", rb_f_block_given_p, 0);
rb_define_global_function("loop", rb_f_loop, 0);
rb_define_method(rb_mKernel, "respond_to?", obj_respond_to, -1);
respond_to = rb_intern("respond_to?");
basic_respond_to = rb_method_node(rb_cObject, respond_to);
rb_register_mark_object((VALUE)basic_respond_to);
rb_define_global_function("raise", rb_f_raise, -1);
rb_define_global_function("fail", rb_f_raise, -1);
rb_define_global_function("caller", rb_f_caller, -1);
rb_define_global_function("global_variables", rb_f_global_variables, 0); /* in variable.c */
rb_define_global_function("local_variables", rb_f_local_variables, 0);
rb_define_global_function("__method__", rb_f_method_name, 0);
rb_define_global_function("__callee__", rb_f_method_name, 0);
rb_define_method(rb_cBasicObject, "__send__", rb_f_send, -1);
rb_define_method(rb_mKernel, "send", rb_f_send, -1);
rb_define_method(rb_mKernel, "public_send", rb_f_public_send, -1);
rb_define_method(rb_cBasicObject, "instance_eval", rb_obj_instance_eval, -1);
rb_define_method(rb_cBasicObject, "instance_exec", rb_obj_instance_exec, -1);
rb_define_private_method(rb_cModule, "append_features", rb_mod_append_features, 1);
rb_define_private_method(rb_cModule, "extend_object", rb_mod_extend_object, 1);
rb_define_private_method(rb_cModule, "include", rb_mod_include, -1);
rb_define_private_method(rb_cModule, "public", rb_mod_public, -1);
rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1);
rb_define_private_method(rb_cModule, "private", rb_mod_private, -1);
rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1);
rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1);
rb_define_method(rb_cModule, "public_method_defined?", rb_mod_public_method_defined, 1);
rb_define_method(rb_cModule, "private_method_defined?", rb_mod_private_method_defined, 1);
rb_define_method(rb_cModule, "protected_method_defined?", rb_mod_protected_method_defined, 1);
rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1);
rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1);
rb_define_method(rb_cModule, "module_eval", rb_mod_module_eval, -1);
rb_define_method(rb_cModule, "class_eval", rb_mod_module_eval, -1);
rb_define_method(rb_cModule, "module_exec", rb_mod_module_exec, -1);
rb_define_method(rb_cModule, "class_exec", rb_mod_module_exec, -1);
rb_undef_method(rb_cClass, "module_function");
Init_eval_method();
rb_define_singleton_method(rb_cModule, "nesting", rb_mod_nesting, 0);
rb_define_singleton_method(rb_cModule, "constants", rb_mod_s_constants, -1);
rb_define_singleton_method(rb_vm_top_self(), "include", top_include, -1);
rb_define_singleton_method(rb_vm_top_self(), "public", top_public, -1);
rb_define_singleton_method(rb_vm_top_self(), "private", top_private, -1);
rb_define_method(rb_mKernel, "extend", rb_obj_extend, -1);
rb_define_global_function("trace_var", rb_f_trace_var, -1); /* in variable.c */
rb_define_global_function("untrace_var", rb_f_untrace_var, -1); /* in variable.c */
rb_define_virtual_variable("$SAFE", safe_getter, safe_setter);
exception_error = rb_exc_new2(rb_eFatal, "exception reentered");
rb_ivar_set(exception_error, idThrowState, INT2FIX(TAG_FATAL));
rb_register_mark_object(exception_error);
}
/* for parser */
int
rb_dvar_defined(ID id)
{
rb_thread_t *th = GET_THREAD();
rb_iseq_t *iseq;
if (th->base_block && (iseq = th->base_block->iseq)) {
while (iseq->type == ISEQ_TYPE_BLOCK ||
iseq->type == ISEQ_TYPE_RESCUE ||
iseq->type == ISEQ_TYPE_ENSURE ||
iseq->type == ISEQ_TYPE_EVAL) {
int i;
for (i = 0; i < iseq->local_table_size; i++) {
if (iseq->local_table[i] == id) {
return 1;
}
}
iseq = iseq->parent_iseq;
}
}
return 0;
}
int
rb_local_defined(ID id)
{
rb_thread_t *th = GET_THREAD();
rb_iseq_t *iseq;
if (th->base_block && th->base_block->iseq) {
int i;
iseq = th->base_block->iseq->local_iseq;
for (i=0; i<iseq->local_table_size; i++) {
if (iseq->local_table[i] == id) {
return 1;
}
}
}
return 0;
}
int
rb_parse_in_eval(void)
{
return GET_THREAD()->parse_in_eval != 0;
}
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