Get the underlying pointer for ruby object val and return it as a DL::CPtr object.
static VALUE
rb_dlptr_s_to_ptr(VALUE self, VALUE val)
{
VALUE ptr;
if (RTEST(rb_obj_is_kind_of(val, rb_cIO))){
rb_io_t *fptr;
FILE *fp;
GetOpenFile(val, fptr);
fp = rb_io_stdio_file(fptr);
ptr = rb_dlptr_new(fp, 0, NULL);
}
else if (RTEST(rb_obj_is_kind_of(val, rb_cString))){
char *str = StringValuePtr(val);
ptr = rb_dlptr_new(str, RSTRING_LEN(val), 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)){
ptr = vptr;
}
else{
rb_raise(rb_eDLError, "to_ptr should return a CPtr object");
}
}
else{
ptr = rb_dlptr_new(NUM2PTR(rb_Integer(val)), 0, NULL);
}
OBJ_INFECT(ptr, val);
rb_iv_set(ptr, "wrapping", val);
return ptr;
}
Allocate size bytes of memory and associate it with an optional freefunc that will be called when the pointer is garbage collected. freefunc must be an address pointing to a function or an instance of DL::CFunc
static VALUE
rb_dlptr_s_malloc(int argc, VALUE argv[], VALUE klass)
{
VALUE size, sym, obj;
long 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 = get_freefunc(sym);
break;
default:
rb_bug("rb_dlptr_s_malloc");
}
obj = rb_dlptr_malloc(s,f);
return obj;
}
Create a new pointer to address with an optional size and freefunc. freefunc will be called when the instance is garbage collected.
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 = get_freefunc(sym);
break;
default:
rb_bug("rb_dlptr_initialize");
}
if (p) {
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, 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;
}
Get the underlying pointer for ruby object val and return it as a DL::CPtr object.
static VALUE
rb_dlptr_s_to_ptr(VALUE self, VALUE val)
{
VALUE ptr;
if (RTEST(rb_obj_is_kind_of(val, rb_cIO))){
rb_io_t *fptr;
FILE *fp;
GetOpenFile(val, fptr);
fp = rb_io_stdio_file(fptr);
ptr = rb_dlptr_new(fp, 0, NULL);
}
else if (RTEST(rb_obj_is_kind_of(val, rb_cString))){
char *str = StringValuePtr(val);
ptr = rb_dlptr_new(str, RSTRING_LEN(val), 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)){
ptr = vptr;
}
else{
rb_raise(rb_eDLError, "to_ptr should return a CPtr object");
}
}
else{
ptr = rb_dlptr_new(NUM2PTR(rb_Integer(val)), 0, NULL);
}
OBJ_INFECT(ptr, val);
rb_iv_set(ptr, "wrapping", val);
return ptr;
}
Returns a new DL::CPtr that has been advanced n bytes.
static 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);
}
Returns a new DL::CPtr that has been moved back n bytes.
static 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);
}
Returns -1 if less than, 0 if equal to, 1 if greater than other. Returns nil if ptr cannot be compared to other.
static VALUE
rb_dlptr_cmp(VALUE self, VALUE other)
{
void *ptr1, *ptr2;
SIGNED_VALUE diff;
if(!rb_obj_is_kind_of(other, rb_cDLCPtr)) return Qnil;
ptr1 = rb_dlptr2cptr(self);
ptr2 = rb_dlptr2cptr(other);
diff = (SIGNED_VALUE)ptr1 - (SIGNED_VALUE)ptr2;
if (!diff) return INT2FIX(0);
return diff > 0 ? INT2NUM(1) : INT2NUM(-1);
}
Returns true if other wraps the same pointer, otherwise returns false.
VALUE
rb_dlptr_eql(VALUE self, VALUE other)
{
void *ptr1, *ptr2;
if(!rb_obj_is_kind_of(other, rb_cDLCPtr)) return Qfalse;
ptr1 = rb_dlptr2cptr(self);
ptr2 = rb_dlptr2cptr(other);
return ptr1 == ptr2 ? Qtrue : Qfalse;
}
Returns integer stored at index. If start and length are given, a string containing the bytes from start of length length will be returned.
VALUE
rb_dlptr_aref(int argc, VALUE argv[], VALUE self)
{
VALUE arg0, arg1;
VALUE retval = Qnil;
size_t offset, len;
switch( rb_scan_args(argc, argv, "11", &arg0, &arg1) ){
case 1:
offset = NUM2ULONG(arg0);
retval = INT2NUM(*((char*)RPTR_DATA(self)->ptr + offset));
break;
case 2:
offset = NUM2ULONG(arg0);
len = NUM2ULONG(arg1);
retval = rb_tainted_str_new((char *)RPTR_DATA(self)->ptr + offset, len);
break;
default:
rb_bug("rb_dlptr_aref()");
}
return retval;
}
Set the value at index to int. Or, set the memory at start until length with the contents of string, the memory from dl_cptr, or the memory pointed at by the memory address addr.
VALUE
rb_dlptr_aset(int argc, VALUE argv[], VALUE self)
{
VALUE arg0, arg1, arg2;
VALUE retval = Qnil;
size_t offset, len;
void *mem;
switch( rb_scan_args(argc, argv, "21", &arg0, &arg1, &arg2) ){
case 2:
offset = NUM2ULONG(arg0);
((char*)RPTR_DATA(self)->ptr)[offset] = NUM2UINT(arg1);
retval = 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);
}
memcpy((char *)RPTR_DATA(self)->ptr + offset, mem, len);
retval = arg2;
break;
default:
rb_bug("rb_dlptr_aset()");
}
return retval;
}
Returns true if other wraps the same pointer, otherwise returns false.
VALUE
rb_dlptr_eql(VALUE self, VALUE other)
{
void *ptr1, *ptr2;
if(!rb_obj_is_kind_of(other, rb_cDLCPtr)) return Qfalse;
ptr1 = rb_dlptr2cptr(self);
ptr2 = rb_dlptr2cptr(other);
return ptr1 == ptr2 ? Qtrue : Qfalse;
}
Get the free function for this pointer. Returns DL::CFunc or nil.
static VALUE
rb_dlptr_free_get(VALUE self)
{
struct ptr_data *pdata;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, pdata);
return rb_dlcfunc_new(pdata->free, DLTYPE_VOID, "free<anonymous>", CFUNC_CDECL);
}
Set the free function for this pointer to the DL::CFunc in function.
static VALUE
rb_dlptr_free_set(VALUE self, VALUE val)
{
struct ptr_data *data;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, data);
data->free = get_freefunc(val);
return Qnil;
}
Returns a string formatted with an easily readable representation of the internal state of the DL::CPtr
static VALUE
rb_dlptr_inspect(VALUE self)
{
struct ptr_data *data;
char str[1024];
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, 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);
}
Returns true if this is a null pointer.
VALUE
rb_dlptr_null_p(VALUE self)
{
struct ptr_data *data;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, data);
return data->ptr ? Qfalse : Qtrue;
}
Get the size of this pointer.
static VALUE
rb_dlptr_size_get(VALUE self)
{
return LONG2NUM(RPTR_DATA(self)->size);
}
Set the size of this pointer to size
static VALUE
rb_dlptr_size_set(VALUE self, VALUE size)
{
RPTR_DATA(self)->size = NUM2LONG(size);
return size;
}
Returns the integer memory location of this DL::CPtr.
static VALUE
rb_dlptr_to_i(VALUE self)
{
struct ptr_data *data;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, data);
return PTR2NUM(data->ptr);
}
Returns the integer memory location of this DL::CPtr.
static VALUE
rb_dlptr_to_i(VALUE self)
{
struct ptr_data *data;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, data);
return PTR2NUM(data->ptr);
}
Returns the pointer contents as a string. When called with no arguments, this method will return the contents until the first NULL byte. When called with len, a string of len bytes will be returned.
static VALUE
rb_dlptr_to_s(int argc, VALUE argv[], VALUE self)
{
struct ptr_data *data;
VALUE arg1, val;
int len;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, 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;
}
Returns the pointer contents as a string. When called with no arguments, this method will return the contents with the length of this pointer’s size. When called with len, a string of len bytes will be returned.
static VALUE
rb_dlptr_to_str(int argc, VALUE argv[], VALUE self)
{
struct ptr_data *data;
VALUE arg1, val;
int len;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, 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;
}
Cast this CPtr to a ruby object.
static VALUE
rb_dlptr_to_value(VALUE self)
{
struct ptr_data *data;
TypedData_Get_Struct(self, struct ptr_data, &dlptr_data_type, data);
return (VALUE)(data->ptr);
}