зеркало из https://github.com/github/ruby.git
611 строки
14 KiB
C
611 строки
14 KiB
C
/**********************************************************************
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struct.c -
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$Author$
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$Date$
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created at: Tue Mar 22 18:44:30 JST 1995
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Copyright (C) 1993-2002 Yukihiro Matsumoto
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**********************************************************************/
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#include "ruby.h"
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VALUE rb_cStruct;
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static VALUE struct_alloc _((VALUE));
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VALUE
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rb_struct_iv_get(c, name)
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VALUE c;
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char *name;
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{
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ID id;
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id = rb_intern(name);
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for (;;) {
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if (rb_ivar_defined(c, id))
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return rb_ivar_get(c, id);
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c = RCLASS(c)->super;
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if (c == 0 || c == rb_cStruct)
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return Qnil;
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}
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}
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static VALUE
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rb_struct_s_members(obj)
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VALUE obj;
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{
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VALUE member, ary;
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VALUE *p, *pend;
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member = rb_struct_iv_get(obj, "__member__");
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if (NIL_P(member)) {
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rb_bug("uninitialized struct");
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}
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ary = rb_ary_new2(RARRAY(member)->len);
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p = RARRAY(member)->ptr; pend = p + RARRAY(member)->len;
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while (p < pend) {
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rb_ary_push(ary, rb_str_new2(rb_id2name(SYM2ID(*p))));
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p++;
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}
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return ary;
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}
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static VALUE
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rb_struct_members(obj)
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VALUE obj;
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{
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return rb_struct_s_members(rb_obj_class(obj));
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}
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VALUE
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rb_struct_getmember(obj, id)
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VALUE obj;
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ID id;
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{
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VALUE member, slot;
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long i;
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member = rb_struct_iv_get(rb_obj_class(obj), "__member__");
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if (NIL_P(member)) {
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rb_bug("uninitialized struct");
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}
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slot = ID2SYM(id);
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for (i=0; i<RARRAY(member)->len; i++) {
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if (RARRAY(member)->ptr[i] == slot) {
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return RSTRUCT(obj)->ptr[i];
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}
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}
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rb_name_error(id, "%s is not struct member", rb_id2name(id));
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return Qnil; /* not reached */
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}
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static VALUE
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rb_struct_ref(obj)
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VALUE obj;
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{
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return rb_struct_getmember(obj, rb_frame_last_func());
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}
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static VALUE rb_struct_ref0(obj) VALUE obj; {return RSTRUCT(obj)->ptr[0];}
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static VALUE rb_struct_ref1(obj) VALUE obj; {return RSTRUCT(obj)->ptr[1];}
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static VALUE rb_struct_ref2(obj) VALUE obj; {return RSTRUCT(obj)->ptr[2];}
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static VALUE rb_struct_ref3(obj) VALUE obj; {return RSTRUCT(obj)->ptr[3];}
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static VALUE rb_struct_ref4(obj) VALUE obj; {return RSTRUCT(obj)->ptr[4];}
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static VALUE rb_struct_ref5(obj) VALUE obj; {return RSTRUCT(obj)->ptr[5];}
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static VALUE rb_struct_ref6(obj) VALUE obj; {return RSTRUCT(obj)->ptr[6];}
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static VALUE rb_struct_ref7(obj) VALUE obj; {return RSTRUCT(obj)->ptr[7];}
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static VALUE rb_struct_ref8(obj) VALUE obj; {return RSTRUCT(obj)->ptr[8];}
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static VALUE rb_struct_ref9(obj) VALUE obj; {return RSTRUCT(obj)->ptr[9];}
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static VALUE (*ref_func[10])() = {
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rb_struct_ref0,
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rb_struct_ref1,
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rb_struct_ref2,
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rb_struct_ref3,
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rb_struct_ref4,
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rb_struct_ref5,
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rb_struct_ref6,
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rb_struct_ref7,
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rb_struct_ref8,
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rb_struct_ref9,
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};
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static void
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rb_struct_modify(s)
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VALUE s;
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{
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if (OBJ_FROZEN(s)) rb_error_frozen("Struct");
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if (!OBJ_TAINTED(s) && rb_safe_level() >= 4)
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rb_raise(rb_eSecurityError, "Insecure: can't modify Struct");
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}
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static VALUE
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rb_struct_set(obj, val)
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VALUE obj, val;
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{
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VALUE member, slot;
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long i;
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member = rb_struct_iv_get(rb_obj_class(obj), "__member__");
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if (NIL_P(member)) {
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rb_bug("uninitialized struct");
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}
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rb_struct_modify(obj);
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for (i=0; i<RARRAY(member)->len; i++) {
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slot = RARRAY(member)->ptr[i];
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if (rb_id_attrset(SYM2ID(slot)) == rb_frame_last_func()) {
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return RSTRUCT(obj)->ptr[i] = val;
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}
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}
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rb_name_error(rb_frame_last_func(), "`%s' is not a struct member",
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rb_id2name(rb_frame_last_func()));
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return Qnil; /* not reached */
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}
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static VALUE
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make_struct(name, member, klass)
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VALUE name, member, klass;
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{
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VALUE nstr;
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ID id;
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long i;
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if (NIL_P(name)) {
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nstr = rb_class_new(klass);
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rb_class_inherited(klass, nstr);
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}
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else {
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char *cname = StringValuePtr(name);
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id = rb_intern(cname);
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if (!rb_is_const_id(id)) {
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rb_name_error(id, "identifier %s needs to be constant", cname);
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}
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nstr = rb_define_class_under(klass, cname, klass);
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}
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rb_iv_set(nstr, "__size__", LONG2NUM(RARRAY(member)->len));
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rb_iv_set(nstr, "__member__", member);
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rb_define_singleton_method(nstr, "allocate", struct_alloc, 0);
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rb_define_singleton_method(nstr, "new", rb_class_new_instance, -1);
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rb_define_singleton_method(nstr, "[]", rb_class_new_instance, -1);
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rb_define_singleton_method(nstr, "members", rb_struct_s_members, 0);
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for (i=0; i< RARRAY(member)->len; i++) {
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ID id = SYM2ID(RARRAY(member)->ptr[i]);
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if (i<10) {
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rb_define_method_id(nstr, id, ref_func[i], 0);
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}
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else {
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rb_define_method_id(nstr, id, rb_struct_ref, 0);
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}
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rb_define_method_id(nstr, rb_id_attrset(id), rb_struct_set, 1);
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}
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return nstr;
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}
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#ifdef HAVE_STDARG_PROTOTYPES
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#include <stdarg.h>
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#define va_init_list(a,b) va_start(a,b)
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#else
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#include <varargs.h>
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#define va_init_list(a,b) va_start(a)
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#endif
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VALUE
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#ifdef HAVE_STDARG_PROTOTYPES
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rb_struct_define(const char *name, ...)
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#else
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rb_struct_define(name, va_alist)
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const char *name;
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va_dcl
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#endif
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{
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va_list ar;
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VALUE nm, ary;
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char *mem;
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if (!name) nm = Qnil;
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else nm = rb_str_new2(name);
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ary = rb_ary_new();
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va_init_list(ar, name);
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while (mem = va_arg(ar, char*)) {
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ID slot = rb_intern(mem);
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rb_ary_push(ary, ID2SYM(slot));
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}
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va_end(ar);
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return make_struct(nm, ary, rb_cStruct);
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}
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static VALUE
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rb_struct_s_def(argc, argv, klass)
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int argc;
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VALUE *argv;
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VALUE klass;
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{
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VALUE name, rest;
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long i;
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VALUE st;
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ID id;
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rb_scan_args(argc, argv, "1*", &name, &rest);
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for (i=0; i<RARRAY(rest)->len; i++) {
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id = rb_to_id(RARRAY(rest)->ptr[i]);
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RARRAY(rest)->ptr[i] = ID2SYM(id);
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}
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if (!NIL_P(name) && TYPE(name) != T_STRING) {
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id = rb_to_id(name);
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rb_ary_unshift(rest, ID2SYM(id));
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name = Qnil;
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}
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st = make_struct(name, rest, klass);
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return st;
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}
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static VALUE
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rb_struct_initialize(self, values)
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VALUE self, values;
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{
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VALUE klass = rb_obj_class(self);
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VALUE size;
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long n;
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rb_struct_modify(self);
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size = rb_struct_iv_get(klass, "__size__");
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n = FIX2LONG(size);
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if (n < RARRAY(values)->len) {
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rb_raise(rb_eArgError, "struct size differs");
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}
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MEMCPY(RSTRUCT(self)->ptr, RARRAY(values)->ptr, VALUE, RARRAY(values)->len);
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if (n > RARRAY(values)->len) {
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rb_mem_clear(RSTRUCT(self)->ptr+RARRAY(values)->len,
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n-RARRAY(values)->len);
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}
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return Qnil;
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}
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static VALUE
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struct_alloc(klass)
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VALUE klass;
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{
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VALUE size;
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long n;
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NEWOBJ(st, struct RStruct);
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OBJSETUP(st, klass, T_STRUCT);
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size = rb_struct_iv_get(klass, "__size__");
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n = FIX2LONG(size);
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st->ptr = ALLOC_N(VALUE, n);
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rb_mem_clear(st->ptr, n);
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st->len = n;
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return (VALUE)st;
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}
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VALUE
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rb_struct_alloc(klass, values)
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VALUE klass, values;
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{
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return rb_class_new_instance(RARRAY(values)->len, RARRAY(values)->ptr, klass);
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}
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VALUE
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#ifdef HAVE_STDARG_PROTOTYPES
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rb_struct_new(VALUE klass, ...)
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#else
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rb_struct_new(klass, va_alist)
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VALUE klass;
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va_dcl
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#endif
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{
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VALUE sz, *mem;
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long size, i;
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va_list args;
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sz = rb_struct_iv_get(klass, "__size__");
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size = FIX2LONG(sz);
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mem = ALLOCA_N(VALUE, size);
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va_init_list(args, klass);
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for (i=0; i<size; i++) {
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mem[i] = va_arg(args, VALUE);
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}
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va_end(args);
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return rb_class_new_instance(size, mem, klass);
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}
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static VALUE
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rb_struct_each(s)
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VALUE s;
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{
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long i;
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for (i=0; i<RSTRUCT(s)->len; i++) {
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rb_yield(RSTRUCT(s)->ptr[i]);
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}
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return s;
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}
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static VALUE
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rb_struct_each_pair(s)
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VALUE s;
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{
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VALUE member;
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long i;
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member = rb_struct_iv_get(rb_obj_class(s), "__member__");
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if (NIL_P(member)) {
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rb_bug("non-initialized struct");
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}
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for (i=0; i<RSTRUCT(s)->len; i++) {
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rb_yield(rb_assoc_new(RARRAY(member)->ptr[i], RSTRUCT(s)->ptr[i]));
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}
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return s;
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}
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static VALUE
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rb_struct_to_s(s)
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VALUE s;
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{
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char *cname = rb_class2name(rb_obj_class(s));
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VALUE str = rb_str_new(0, strlen(cname) + 4);
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sprintf(RSTRING(str)->ptr, "#<%s>", cname);
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RSTRING(str)->len = strlen(RSTRING(str)->ptr);
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return str;
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}
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static VALUE
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inspect_struct(s)
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VALUE s;
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{
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char *cname = rb_class2name(rb_obj_class(s));
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VALUE str, member;
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long i;
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member = rb_struct_iv_get(rb_obj_class(s), "__member__");
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if (NIL_P(member)) {
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rb_bug("non-initialized struct");
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}
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str = rb_str_buf_new2("#<");
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rb_str_cat2(str, cname);
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rb_str_cat2(str, " ");
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for (i=0; i<RSTRUCT(s)->len; i++) {
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VALUE str2, slot;
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char *p;
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if (i > 0) {
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rb_str_cat2(str, ", ");
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}
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slot = RARRAY(member)->ptr[i];
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p = rb_id2name(SYM2ID(slot));
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rb_str_cat2(str, p);
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rb_str_cat2(str, "=");
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str2 = rb_inspect(RSTRUCT(s)->ptr[i]);
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rb_str_append(str, str2);
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}
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rb_str_cat2(str, ">");
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OBJ_INFECT(str, s);
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return str;
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}
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static VALUE
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rb_struct_inspect(s)
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VALUE s;
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{
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if (rb_inspecting_p(s)) {
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char *cname = rb_class2name(rb_obj_class(s));
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VALUE str = rb_str_new(0, strlen(cname) + 8);
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sprintf(RSTRING(str)->ptr, "#<%s:...>", cname);
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RSTRING(str)->len = strlen(RSTRING(str)->ptr);
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return str;
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}
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return rb_protect_inspect(inspect_struct, s, 0);
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}
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static VALUE
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rb_struct_to_a(s)
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VALUE s;
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{
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return rb_ary_new4(RSTRUCT(s)->len, RSTRUCT(s)->ptr);
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}
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static VALUE
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rb_struct_clone(s)
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VALUE s;
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{
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VALUE clone = rb_obj_clone(s);
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RSTRUCT(clone)->ptr = ALLOC_N(VALUE, RSTRUCT(s)->len);
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RSTRUCT(clone)->len = RSTRUCT(s)->len;
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MEMCPY(RSTRUCT(clone)->ptr, RSTRUCT(s)->ptr, VALUE, RSTRUCT(clone)->len);
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return clone;
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}
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static VALUE
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rb_struct_aref_id(s, id)
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VALUE s;
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ID id;
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{
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VALUE member;
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long i, len;
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member = rb_struct_iv_get(rb_obj_class(s), "__member__");
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if (NIL_P(member)) {
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rb_bug("non-initialized struct");
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}
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len = RARRAY(member)->len;
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for (i=0; i<len; i++) {
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if (SYM2ID(RARRAY(member)->ptr[i]) == id) {
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return RSTRUCT(s)->ptr[i];
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}
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}
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rb_name_error(id, "no member '%s' in struct", rb_id2name(id));
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return Qnil; /* not reached */
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}
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VALUE
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rb_struct_aref(s, idx)
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VALUE s, idx;
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{
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long i;
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if (TYPE(idx) == T_STRING || TYPE(idx) == T_SYMBOL) {
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return rb_struct_aref_id(s, rb_to_id(idx));
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}
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i = NUM2LONG(idx);
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if (i < 0) i = RSTRUCT(s)->len + i;
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if (i < 0)
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rb_raise(rb_eIndexError, "offset %d too small for struct(size:%d)",
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i, RSTRUCT(s)->len);
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if (RSTRUCT(s)->len <= i)
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rb_raise(rb_eIndexError, "offset %d too large for struct(size:%d)",
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i, RSTRUCT(s)->len);
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return RSTRUCT(s)->ptr[i];
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}
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static VALUE
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rb_struct_aset_id(s, id, val)
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VALUE s, val;
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ID id;
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{
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VALUE member;
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long i, len;
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member = rb_struct_iv_get(rb_obj_class(s), "__member__");
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if (NIL_P(member)) {
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rb_bug("non-initialized struct");
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}
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rb_struct_modify(s);
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len = RARRAY(member)->len;
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for (i=0; i<len; i++) {
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if (SYM2ID(RARRAY(member)->ptr[i]) == id) {
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RSTRUCT(s)->ptr[i] = val;
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return val;
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}
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}
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rb_name_error(id, "no member '%s' in struct", rb_id2name(id));
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}
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VALUE
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rb_struct_aset(s, idx, val)
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VALUE s, idx, val;
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{
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long i;
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if (TYPE(idx) == T_STRING || TYPE(idx) == T_SYMBOL) {
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return rb_struct_aset_id(s, rb_to_id(idx), val);
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}
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i = NUM2LONG(idx);
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if (i < 0) i = RSTRUCT(s)->len + i;
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if (i < 0) {
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rb_raise(rb_eIndexError, "offset %d too small for struct(size:%d)",
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i, RSTRUCT(s)->len);
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}
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if (RSTRUCT(s)->len <= i) {
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rb_raise(rb_eIndexError, "offset %d too large for struct(size:%d)",
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i, RSTRUCT(s)->len);
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}
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rb_struct_modify(s);
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return RSTRUCT(s)->ptr[i] = val;
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}
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static VALUE
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rb_struct_select(argc, argv, s)
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE s;
|
|
{
|
|
VALUE result = rb_ary_new();
|
|
long i;
|
|
|
|
if (rb_block_given_p()) {
|
|
if (argc > 0) {
|
|
rb_raise(rb_eArgError, "wrong number arguments(%d for 0)", argc);
|
|
}
|
|
for (i = 0; i < RSTRUCT(s)->len; i++) {
|
|
if (RTEST(rb_yield(RSTRUCT(s)->ptr[i]))) {
|
|
rb_ary_push(result, RSTRUCT(s)->ptr[i]);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for (i=0; i<argc; i++) {
|
|
rb_ary_push(result, rb_struct_aref(s, argv[i]));
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
rb_struct_equal(s, s2)
|
|
VALUE s, s2;
|
|
{
|
|
long i;
|
|
|
|
if (s == s2) return Qtrue;
|
|
if (TYPE(s2) != T_STRUCT) return Qfalse;
|
|
if (rb_obj_class(s) != rb_obj_class(s2)) return Qfalse;
|
|
if (RSTRUCT(s)->len != RSTRUCT(s2)->len) {
|
|
rb_bug("inconsistent struct"); /* should never happen */
|
|
}
|
|
|
|
for (i=0; i<RSTRUCT(s)->len; i++) {
|
|
if (!rb_equal(RSTRUCT(s)->ptr[i], RSTRUCT(s2)->ptr[i])) return Qfalse;
|
|
}
|
|
return Qtrue;
|
|
}
|
|
|
|
static VALUE
|
|
rb_struct_size(s)
|
|
VALUE s;
|
|
{
|
|
return LONG2FIX(RSTRUCT(s)->len);
|
|
}
|
|
|
|
void
|
|
Init_Struct()
|
|
{
|
|
rb_cStruct = rb_define_class("Struct", rb_cObject);
|
|
rb_include_module(rb_cStruct, rb_mEnumerable);
|
|
|
|
rb_undef_method(CLASS_OF(rb_cStruct), "allocate");
|
|
rb_define_singleton_method(rb_cStruct, "new", rb_struct_s_def, -1);
|
|
|
|
rb_define_method(rb_cStruct, "initialize", rb_struct_initialize, -2);
|
|
rb_define_method(rb_cStruct, "clone", rb_struct_clone, 0);
|
|
|
|
rb_define_method(rb_cStruct, "==", rb_struct_equal, 1);
|
|
|
|
rb_define_method(rb_cStruct, "to_s", rb_struct_to_s, 0);
|
|
rb_define_method(rb_cStruct, "inspect", rb_struct_inspect, 0);
|
|
rb_define_method(rb_cStruct, "to_a", rb_struct_to_a, 0);
|
|
rb_define_method(rb_cStruct, "values", rb_struct_to_a, 0);
|
|
rb_define_method(rb_cStruct, "size", rb_struct_size, 0);
|
|
rb_define_method(rb_cStruct, "length", rb_struct_size, 0);
|
|
|
|
rb_define_method(rb_cStruct, "each", rb_struct_each, 0);
|
|
rb_define_method(rb_cStruct, "each_pair", rb_struct_each_pair, 0);
|
|
rb_define_method(rb_cStruct, "[]", rb_struct_aref, 1);
|
|
rb_define_method(rb_cStruct, "[]=", rb_struct_aset, 2);
|
|
rb_define_method(rb_cStruct, "select", rb_struct_select, -1);
|
|
|
|
rb_define_method(rb_cStruct, "members", rb_struct_members, 0);
|
|
}
|