/* -*- C -*- * $Id$ */ #include #include #include #include /* for ruby version code */ #include "dl.h" VALUE rb_cDLCPtr; static ID id_to_ptr; static void dlptr_free(struct ptr_data *data) { if (data->ptr) { if (data->free) { (*(data->free))(data->ptr); } } } static void dlptr_mark(struct ptr_data *data) { } void dlptr_init(VALUE val) { struct ptr_data *data; Data_Get_Struct(val, struct ptr_data, data); OBJ_TAINT(val); } VALUE rb_dlptr_new2(VALUE klass, void *ptr, long size, freefunc_t func) { struct ptr_data *data; VALUE val; rb_secure(4); val = Data_Make_Struct(klass, struct ptr_data, 0, dlptr_free, data); data->ptr = ptr; data->free = func; data->size = size; dlptr_init(val); return val; } VALUE rb_dlptr_new(void *ptr, long size, freefunc_t func) { return rb_dlptr_new2(rb_cDLCPtr, ptr, size, func); } VALUE rb_dlptr_malloc(long size, freefunc_t func) { void *ptr; rb_secure(4); ptr = ruby_xmalloc((size_t)size); memset(ptr,0,(size_t)size); return rb_dlptr_new(ptr, size, func); } void * rb_dlptr2cptr(VALUE val) { struct ptr_data *data; void *ptr; if (rb_obj_is_kind_of(val, rb_cDLCPtr)) { Data_Get_Struct(val, struct ptr_data, data); ptr = data->ptr; } else if (val == Qnil) { ptr = NULL; } else{ rb_raise(rb_eTypeError, "DL::PtrData was expected"); } return ptr; } static VALUE rb_dlptr_s_allocate(VALUE klass) { VALUE obj; struct ptr_data *data; rb_secure(4); obj = Data_Make_Struct(klass, struct ptr_data, dlptr_mark, dlptr_free, data); data->ptr = 0; data->size = 0; data->free = 0; return obj; } static VALUE rb_dlptr_initialize(int argc, VALUE argv[], VALUE self) { VALUE ptr, sym, size; struct ptr_data *data; void *p = NULL; freefunc_t f = NULL; long s = 0; switch (rb_scan_args(argc, argv, "12", &ptr, &size, &sym)) { case 1: p = (void*)(NUM2PTR(rb_Integer(ptr))); break; case 2: p = (void*)(NUM2PTR(rb_Integer(ptr))); s = NUM2LONG(size); break; case 3: p = (void*)(NUM2PTR(rb_Integer(ptr))); s = NUM2LONG(size); f = NIL_P(sym) ? NULL : RCFUNC_DATA(sym)->ptr; break; default: rb_bug("rb_dlptr_initialize"); } if (p) { Data_Get_Struct(self, struct ptr_data, data); if (data->ptr && data->free) { /* Free previous memory. Use of inappropriate initialize may cause SEGV. */ (*(data->free))(data->ptr); } data->ptr = p; data->size = s; data->free = f; } return Qnil; } static VALUE rb_dlptr_s_malloc(int argc, VALUE argv[], VALUE klass) { VALUE size, sym, obj; int s; freefunc_t f; switch (rb_scan_args(argc, argv, "11", &size, &sym)) { case 1: s = NUM2LONG(size); f = NULL; break; case 2: s = NUM2LONG(size); f = RCFUNC_DATA(sym)->ptr; break; default: rb_bug("rb_dlptr_s_malloc"); } obj = rb_dlptr_malloc(s,f); return obj; } VALUE rb_dlptr_to_i(VALUE self) { struct ptr_data *data; Data_Get_Struct(self, struct ptr_data, data); return PTR2NUM(data->ptr); } VALUE rb_dlptr_to_value(VALUE self) { struct ptr_data *data; Data_Get_Struct(self, struct ptr_data, data); return (VALUE)(data->ptr); } VALUE rb_dlptr_ptr(VALUE self) { struct ptr_data *data; Data_Get_Struct(self, struct ptr_data, data); return rb_dlptr_new(*((void**)(data->ptr)),0,0); } VALUE rb_dlptr_ref(VALUE self) { struct ptr_data *data; Data_Get_Struct(self, struct ptr_data, data); return rb_dlptr_new(&(data->ptr),0,0); } VALUE rb_dlptr_null_p(VALUE self) { struct ptr_data *data; Data_Get_Struct(self, struct ptr_data, data); return data->ptr ? Qfalse : Qtrue; } VALUE rb_dlptr_free_set(VALUE self, VALUE val) { struct ptr_data *data; extern VALUE rb_cDLCFunc; Data_Get_Struct(self, struct ptr_data, data); if( rb_obj_is_kind_of(val, rb_cDLCFunc) == Qtrue ){ data->free = RCFUNC_DATA(val)->ptr; } else{ data->free = NUM2PTR(rb_Integer(val)); } return Qnil; } VALUE rb_dlptr_free_get(VALUE self) { struct ptr_data *pdata; Data_Get_Struct(self, struct ptr_data, pdata); return rb_dlcfunc_new(pdata->free, DLTYPE_VOID, "free", CFUNC_CDECL); } VALUE rb_dlptr_to_s(int argc, VALUE argv[], VALUE self) { struct ptr_data *data; VALUE arg1, val; int len; Data_Get_Struct(self, struct ptr_data, data); switch (rb_scan_args(argc, argv, "01", &arg1)) { case 0: val = rb_tainted_str_new2((char*)(data->ptr)); break; case 1: len = NUM2INT(arg1); val = rb_tainted_str_new((char*)(data->ptr), len); break; default: rb_bug("rb_dlptr_to_s"); } return val; } VALUE rb_dlptr_to_str(int argc, VALUE argv[], VALUE self) { struct ptr_data *data; VALUE arg1, val; int len; Data_Get_Struct(self, struct ptr_data, data); switch (rb_scan_args(argc, argv, "01", &arg1)) { case 0: val = rb_tainted_str_new((char*)(data->ptr),data->size); break; case 1: len = NUM2INT(arg1); val = rb_tainted_str_new((char*)(data->ptr), len); break; default: rb_bug("rb_dlptr_to_str"); } return val; } VALUE rb_dlptr_inspect(VALUE self) { struct ptr_data *data; char str[1024]; Data_Get_Struct(self, struct ptr_data, data); snprintf(str, 1023, "#<%s:%p ptr=%p size=%ld free=%p>", rb_class2name(CLASS_OF(self)), data, data->ptr, data->size, data->free); return rb_str_new2(str); } VALUE rb_dlptr_eql(VALUE self, VALUE other) { void *ptr1, *ptr2; ptr1 = rb_dlptr2cptr(self); ptr2 = rb_dlptr2cptr(other); return ptr1 == ptr2 ? Qtrue : Qfalse; } VALUE rb_dlptr_cmp(VALUE self, VALUE other) { void *ptr1, *ptr2; ptr1 = rb_dlptr2cptr(self); ptr2 = rb_dlptr2cptr(other); return PTR2NUM((long)ptr1 - (long)ptr2); } VALUE rb_dlptr_plus(VALUE self, VALUE other) { void *ptr; long num, size; ptr = rb_dlptr2cptr(self); size = RPTR_DATA(self)->size; num = NUM2LONG(other); return rb_dlptr_new((char *)ptr + num, size - num, 0); } VALUE rb_dlptr_minus(VALUE self, VALUE other) { void *ptr; long num, size; ptr = rb_dlptr2cptr(self); size = RPTR_DATA(self)->size; num = NUM2LONG(other); return rb_dlptr_new((char *)ptr - num, size + num, 0); } VALUE rb_dlptr_aref(int argc, VALUE argv[], VALUE self) { VALUE arg0, arg1; size_t offset, len; switch( rb_scan_args(argc, argv, "11", &arg0, &arg1) ){ case 1: offset = NUM2ULONG(arg0); len = 1; break; case 2: offset = NUM2ULONG(arg0); len = NUM2ULONG(arg1); break; defualt: rb_bug("rb_dlptr_aset()"); } return rb_tainted_str_new(RPTR_DATA(self)->ptr + offset, len); } VALUE rb_dlptr_aset(int argc, VALUE argv[], VALUE self) { VALUE arg0, arg1, arg2; size_t offset, len; void *mem; switch( rb_scan_args(argc, argv, "21", &arg0, &arg1, &arg2) ){ case 2: offset = NUM2ULONG(arg0); len = 1; mem = NUM2PTR(arg1); break; case 3: offset = NUM2ULONG(arg0); len = NUM2ULONG(arg1); if( TYPE(arg2) == T_STRING ){ mem = StringValuePtr(arg2); } else if( rb_obj_is_kind_of(arg2, rb_cDLCPtr) ){ mem = rb_dlptr2cptr(arg2); } else{ mem = NUM2PTR(arg2); } break; defualt: rb_bug("rb_dlptr_aset()"); } memcpy(RPTR_DATA(self)->ptr + offset, mem, len); return Qnil; } VALUE rb_dlptr_size(int argc, VALUE argv[], VALUE self) { VALUE size; if (rb_scan_args(argc, argv, "01", &size) == 0){ return LONG2NUM(RPTR_DATA(self)->size); } else{ RPTR_DATA(self)->size = NUM2LONG(size); return size; } } VALUE rb_dlptr_s_to_ptr(VALUE self, VALUE val) { if( rb_obj_is_kind_of(val, rb_cIO) == Qtrue ){ OpenFile *fptr; FILE *fp; GetOpenFile(val, fptr); #if RUBY_VERSION_CODE >= 190 fp = rb_io_stdio_file(fptr); #else fp = fptr->f; #endif return rb_dlptr_new(fp, sizeof(FILE), NULL); } else if( rb_respond_to(val, id_to_ptr) ){ VALUE vptr = rb_funcall(val, id_to_ptr, 0); if( rb_obj_is_kind_of(vptr, rb_cDLCPtr) ){ return vptr; } else{ rb_raise(rb_eDLError, "to_ptr should return a CPtr object."); } } else{ return rb_dlptr_new(NUM2PTR(rb_Integer(val)), 0, NULL); } } void Init_dlptr() { id_to_ptr = rb_intern("to_ptr"); rb_cDLCPtr = rb_define_class_under(rb_mDL, "CPtr", rb_cObject); rb_define_alloc_func(rb_cDLCPtr, rb_dlptr_s_allocate); rb_define_singleton_method(rb_cDLCPtr, "malloc", rb_dlptr_s_malloc, -1); rb_define_singleton_method(rb_cDLCPtr, "to_ptr", rb_dlptr_s_to_ptr, 1); rb_define_singleton_method(rb_cDLCPtr, "[]", rb_dlptr_s_to_ptr, 1); rb_define_method(rb_cDLCPtr, "initialize", rb_dlptr_initialize, -1); rb_define_method(rb_cDLCPtr, "free=", rb_dlptr_free_set, 1); rb_define_method(rb_cDLCPtr, "free", rb_dlptr_free_get, 0); rb_define_method(rb_cDLCPtr, "to_i", rb_dlptr_to_i, 0); rb_define_method(rb_cDLCPtr, "to_value", rb_dlptr_to_value, 0); rb_define_method(rb_cDLCPtr, "ptr", rb_dlptr_ptr, 0); rb_define_method(rb_cDLCPtr, "+@", rb_dlptr_ptr, 0); rb_define_method(rb_cDLCPtr, "ref", rb_dlptr_ref, 0); rb_define_method(rb_cDLCPtr, "-@", rb_dlptr_ref, 0); rb_define_method(rb_cDLCPtr, "null?", rb_dlptr_null_p, 0); rb_define_method(rb_cDLCPtr, "to_s", rb_dlptr_to_s, -1); rb_define_method(rb_cDLCPtr, "to_str", rb_dlptr_to_str, -1); rb_define_method(rb_cDLCPtr, "inspect", rb_dlptr_inspect, 0); rb_define_method(rb_cDLCPtr, "<=>", rb_dlptr_cmp, 1); rb_define_method(rb_cDLCPtr, "==", rb_dlptr_eql, 1); rb_define_method(rb_cDLCPtr, "eql?", rb_dlptr_eql, 1); rb_define_method(rb_cDLCPtr, "+", rb_dlptr_plus, 1); rb_define_method(rb_cDLCPtr, "-", rb_dlptr_minus, 1); rb_define_method(rb_cDLCPtr, "[]", rb_dlptr_aref, -1); rb_define_method(rb_cDLCPtr, "[]=", rb_dlptr_aset, -1); rb_define_method(rb_cDLCPtr, "size", rb_dlptr_size, -1); rb_define_method(rb_cDLCPtr, "size=", rb_dlptr_size, -1); rb_define_const(rb_mDL, "NULL", rb_dlptr_new(0, 0, 0)); }