static VALUE
dlhandle_sym(void *handle, const char *name)
{
#if defined(HAVE_DLERROR)
const char *err;
# define CHECK_DLERROR if( err = dlerror() ){ func = 0; }
#else
# define CHECK_DLERROR
#endif
void (*func)() = dlsym(handle, name);
CHECK_DLERROR;
#if defined(FUNC_STDCALL)
if( !func ){
int i;
int len = strlen(name);
char *name_n;
#if defined(__CYGWIN__) || defined(_WIN32) || defined(__MINGW32__)
{
char *name_a = (char*)xmalloc(len+2);
strcpy(name_a, name);
name_n = name_a;
name_a[len] = 'A';
name_a[len+1] = '\0';
func = dlsym(handle, name_a);
CHECK_DLERROR;
if( func ) goto found;
name_n = xrealloc(name_a, len+6);
}
#else
name_n = (char*)xmalloc(len+6);
#endif
memcpy(name_n, name, len);
name_n[len++] = '@';
for( i = 0; i < 256; i += 4 ){
sprintf(name_n + len, "%d", i);
func = dlsym(handle, name_n);
CHECK_DLERROR;
if( func ) break;
}
if( func ) goto found;
name_n[len-1] = 'A';
name_n[len++] = '@';
for( i = 0; i < 256; i += 4 ){
sprintf(name_n + len, "%d", i);
func = dlsym(handle, name_n);
CHECK_DLERROR;
if( func ) break;
}
found:
xfree(name_n);
}
#endif
if( !func ){
rb_raise(rb_eDLError, "unknown symbol \"%s\"", name);
}
return PTR2NUM(func);
}
/*
* call-seq: Fiddle.realloc(addr, size)
*
* Change the size of the memory allocated at the memory location +addr+ to
* +size+ bytes. Returns the memory address of the reallocated memory, which
* may be different than the address passed in.
*/
static VALUE
rb_fiddle_realloc(VALUE self, VALUE addr, VALUE size)
{
void *ptr = NUM2PTR(addr);
ptr = (void*)ruby_xrealloc(ptr, NUM2INT(size));
return PTR2NUM(ptr);
}
/*
* call-seq: Fiddle.malloc(size)
*
* Allocate +size+ bytes of memory and return the integer memory address
* for the allocated memory.
*/
static VALUE
rb_fiddle_malloc(VALUE self, VALUE size)
{
void *ptr;
ptr = (void*)ruby_xmalloc(NUM2INT(size));
return PTR2NUM(ptr);
}
/*
* call-seq: to_i
*
* Returns the memory address for this handle.
*/
static VALUE
rb_fiddle_handle_to_i(VALUE self)
{
struct dl_handle *fiddle_handle;
TypedData_Get_Struct(self, struct dl_handle, &fiddle_handle_data_type, fiddle_handle);
return PTR2NUM(fiddle_handle);
}
/*
* call-seq: to_i
*
* Returns the memory address for this handle.
*/
VALUE
rb_dlhandle_to_i(VALUE self)
{
struct dl_handle *dlhandle;
TypedData_Get_Struct(self, struct dl_handle, &dlhandle_data_type, dlhandle);
return PTR2NUM(dlhandle);
}
static VALUE
initialize(int argc, VALUE argv[], VALUE self)
{
ffi_cif * cif;
ffi_type **arg_types, *rtype;
ffi_status result;
VALUE ptr, args, ret_type, abi, kwds, ary;
int i, len;
int nabi;
void *cfunc;
rb_scan_args(argc, argv, "31:", &ptr, &args, &ret_type, &abi, &kwds);
ptr = rb_Integer(ptr);
cfunc = NUM2PTR(ptr);
PTR2NUM(cfunc);
nabi = NIL_P(abi) ? FFI_DEFAULT_ABI : NUM2INT(abi);
abi = INT2FIX(nabi);
i = NUM2INT(ret_type);
rtype = INT2FFI_TYPE(i);
ret_type = INT2FIX(i);
Check_Type(args, T_ARRAY);
len = RARRAY_LENINT(args);
Check_Max_Args("args", len);
ary = rb_ary_subseq(args, 0, len);
for (i = 0; i < RARRAY_LEN(args); i++) {
VALUE a = RARRAY_PTR(args)[i];
int type = NUM2INT(a);
(void)INT2FFI_TYPE(type); /* raise */
if (INT2FIX(type) != a) rb_ary_store(ary, i, INT2FIX(type));
}
OBJ_FREEZE(ary);
rb_iv_set(self, "@ptr", ptr);
rb_iv_set(self, "@args", args);
rb_iv_set(self, "@return_type", ret_type);
rb_iv_set(self, "@abi", abi);
if (!NIL_P(kwds)) rb_hash_foreach(kwds, parse_keyword_arg_i, self);
TypedData_Get_Struct(self, ffi_cif, &function_data_type, cif);
arg_types = xcalloc(len + 1, sizeof(ffi_type *));
for (i = 0; i < RARRAY_LEN(args); i++) {
int type = NUM2INT(RARRAY_AREF(args, i));
arg_types[i] = INT2FFI_TYPE(type);
}
arg_types[len] = NULL;
result = ffi_prep_cif(cif, nabi, len, rtype, arg_types);
if (result)
rb_raise(rb_eRuntimeError, "error creating CIF %d", result);
return self;
}
static VALUE
cr_to_ptr (VALUE self)
{
if (NIL_P (rb_cairo__cFFIPointer))
return Qnil;
return rb_funcall (rb_cairo__cFFIPointer, rb_intern ("new"),
1, PTR2NUM (_SELF));
}
/*
* call-seq: DL.realloc(addr, size)
*
* Change the size of the memory allocated at the memory location +addr+ to
* +size+ bytes. Returns the memory address of the reallocated memory, which
* may be different than the address passed in.
*/
VALUE
rb_dl_realloc(VALUE self, VALUE addr, VALUE size)
{
void *ptr = NUM2PTR(addr);
rb_secure(4);
ptr = (void*)ruby_xrealloc(ptr, NUM2INT(size));
return PTR2NUM(ptr);
}
/*
* call-seq: DL.malloc
*
* Allocate +size+ bytes of memory and return the integer memory address
* for the allocated memory.
*/
VALUE
rb_dl_malloc(VALUE self, VALUE size)
{
void *ptr;
rb_secure(4);
ptr = (void*)ruby_xmalloc(NUM2INT(size));
return PTR2NUM(ptr);
}
static VALUE
cr_win32_surface_get_hdc (VALUE self)
{
HDC hdc;
hdc = cairo_win32_surface_get_dc (_SELF);
if (!hdc)
return Qnil;
else
return PTR2NUM (hdc);
}
static VALUE
to_i(VALUE self)
{
fiddle_closure * cl;
void *code;
TypedData_Get_Struct(self, fiddle_closure, &closure_data_type, cl);
code = cl->code;
return PTR2NUM(code);
}
VALUE
generic_to_value(VALUE rettype, fiddle_generic retval)
{
int type = NUM2INT(rettype);
VALUE cPointer;
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
switch (type) {
case TYPE_VOID:
return Qnil;
case TYPE_VOIDP:
return rb_funcall(cPointer, rb_intern("[]"), 1,
PTR2NUM((void *)retval.pointer));
case TYPE_CHAR:
return INT2NUM((signed char)retval.fffi_sarg);
case -TYPE_CHAR:
return INT2NUM((unsigned char)retval.fffi_arg);
case TYPE_SHORT:
return INT2NUM((signed short)retval.fffi_sarg);
case -TYPE_SHORT:
return INT2NUM((unsigned short)retval.fffi_arg);
case TYPE_INT:
return INT2NUM((signed int)retval.fffi_sarg);
case -TYPE_INT:
return UINT2NUM((unsigned int)retval.fffi_arg);
case TYPE_LONG:
return LONG2NUM(retval.slong);
case -TYPE_LONG:
return ULONG2NUM(retval.ulong);
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
return LL2NUM(retval.slong_long);
case -TYPE_LONG_LONG:
return ULL2NUM(retval.ulong_long);
#endif
case TYPE_FLOAT:
return rb_float_new(retval.ffloat);
case TYPE_DOUBLE:
return rb_float_new(retval.ddouble);
default:
rb_raise(rb_eRuntimeError, "unknown type %d", type);
}
UNREACHABLE;
}
VALUE
generic_to_value(VALUE rettype, fiddle_generic retval)
{
int signed_p = 1;
int type = NUM2INT(rettype);
VALUE cPointer;
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
if (type < 0) {
type = -1 * type;
signed_p = 0;
}
switch (type) {
case TYPE_VOID:
return Qnil;
case TYPE_VOIDP:
return rb_funcall(cPointer, rb_intern("[]"), 1,
PTR2NUM((void *)retval.pointer));
case TYPE_CHAR:
case TYPE_SHORT:
case TYPE_INT:
return INT2NUM(retval.sint);
case TYPE_LONG:
if (signed_p) return LONG2NUM(retval.slong);
return ULONG2NUM(retval.ulong);
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
return rb_ll2inum(retval.long_long);
break;
#endif
case TYPE_FLOAT:
return rb_float_new(retval.ffloat);
case TYPE_DOUBLE:
return rb_float_new(retval.ddouble);
default:
rb_raise(rb_eRuntimeError, "unknown type %d", type);
}
}
VALUE
rb_dl_value2ptr(VALUE self, VALUE val)
{
return PTR2NUM((void*)val);
}
static VALUE
fiddle_handle_sym(void *handle, VALUE symbol)
{
#if defined(HAVE_DLERROR)
const char *err;
# define CHECK_DLERROR if ((err = dlerror()) != 0) { func = 0; }
#else
# define CHECK_DLERROR
#endif
void (*func)();
const char *name = SafeStringValueCStr(symbol);
rb_secure(2);
#ifdef HAVE_DLERROR
dlerror();
#endif
func = (void (*)())(VALUE)dlsym(handle, name);
CHECK_DLERROR;
#if defined(FUNC_STDCALL)
if( !func ){
int i;
int len = (int)strlen(name);
char *name_n;
#if defined(__CYGWIN__) || defined(_WIN32) || defined(__MINGW32__)
{
char *name_a = (char*)xmalloc(len+2);
strcpy(name_a, name);
name_n = name_a;
name_a[len] = 'A';
name_a[len+1] = '\0';
func = dlsym(handle, name_a);
CHECK_DLERROR;
if( func ) goto found;
name_n = xrealloc(name_a, len+6);
}
#else
name_n = (char*)xmalloc(len+6);
#endif
memcpy(name_n, name, len);
name_n[len++] = '@';
for( i = 0; i < 256; i += 4 ){
sprintf(name_n + len, "%d", i);
func = dlsym(handle, name_n);
CHECK_DLERROR;
if( func ) break;
}
if( func ) goto found;
name_n[len-1] = 'A';
name_n[len++] = '@';
for( i = 0; i < 256; i += 4 ){
sprintf(name_n + len, "%d", i);
func = dlsym(handle, name_n);
CHECK_DLERROR;
if( func ) break;
}
found:
xfree(name_n);
}
#endif
if( !func ){
rb_raise(rb_eFiddleError, "unknown symbol \"%"PRIsVALUE"\"", symbol);
}
return PTR2NUM(func);
}
void
Init_fiddle(void)
{
/*
* Document-module: Fiddle
*
* A libffi wrapper for Ruby.
*
* == Description
*
* Fiddle is an extension to translate a foreign function interface (FFI)
* with ruby.
*
* It wraps {libffi}[http://sourceware.org/libffi/], a popular C library
* which provides a portable interface that allows code written in one
* language to call code written in another language.
*
* == Example
*
* Here we will use Fiddle::Function to wrap {floor(3) from
* libm}[http://linux.die.net/man/3/floor]
*
* require 'fiddle'
*
* libm = Fiddle.dlopen('/lib/libm.so.6')
*
* floor = Fiddle::Function.new(
* libm['floor'],
* [Fiddle::TYPE_DOUBLE],
* Fiddle::TYPE_DOUBLE
* )
*
* puts floor.call(3.14159) #=> 3.0
*
*
*/
mFiddle = rb_define_module("Fiddle");
/*
* Document-class: Fiddle::DLError
*
* standard dynamic load exception
*/
rb_eFiddleError = rb_define_class_under(mFiddle, "DLError", rb_eStandardError);
/* Document-const: TYPE_VOID
*
* C type - void
*/
rb_define_const(mFiddle, "TYPE_VOID", INT2NUM(TYPE_VOID));
/* Document-const: TYPE_VOIDP
*
* C type - void*
*/
rb_define_const(mFiddle, "TYPE_VOIDP", INT2NUM(TYPE_VOIDP));
/* Document-const: TYPE_CHAR
*
* C type - char
*/
rb_define_const(mFiddle, "TYPE_CHAR", INT2NUM(TYPE_CHAR));
/* Document-const: TYPE_SHORT
*
* C type - short
*/
rb_define_const(mFiddle, "TYPE_SHORT", INT2NUM(TYPE_SHORT));
/* Document-const: TYPE_INT
*
* C type - int
*/
rb_define_const(mFiddle, "TYPE_INT", INT2NUM(TYPE_INT));
/* Document-const: TYPE_LONG
*
* C type - long
*/
rb_define_const(mFiddle, "TYPE_LONG", INT2NUM(TYPE_LONG));
#if HAVE_LONG_LONG
/* Document-const: TYPE_LONG_LONG
*
* C type - long long
*/
rb_define_const(mFiddle, "TYPE_LONG_LONG", INT2NUM(TYPE_LONG_LONG));
#endif
/* Document-const: TYPE_FLOAT
*
* C type - float
*/
rb_define_const(mFiddle, "TYPE_FLOAT", INT2NUM(TYPE_FLOAT));
/* Document-const: TYPE_DOUBLE
*
* C type - double
*/
rb_define_const(mFiddle, "TYPE_DOUBLE", INT2NUM(TYPE_DOUBLE));
/* Document-const: TYPE_SIZE_T
*
* C type - size_t
*/
rb_define_const(mFiddle, "TYPE_SIZE_T", INT2NUM(TYPE_SIZE_T));
/* Document-const: TYPE_SSIZE_T
*
* C type - ssize_t
*/
rb_define_const(mFiddle, "TYPE_SSIZE_T", INT2NUM(TYPE_SSIZE_T));
/* Document-const: TYPE_PTRDIFF_T
*
* C type - ptrdiff_t
*/
rb_define_const(mFiddle, "TYPE_PTRDIFF_T", INT2NUM(TYPE_PTRDIFF_T));
/* Document-const: TYPE_INTPTR_T
*
* C type - intptr_t
*/
rb_define_const(mFiddle, "TYPE_INTPTR_T", INT2NUM(TYPE_INTPTR_T));
/* Document-const: TYPE_UINTPTR_T
*
* C type - uintptr_t
*/
rb_define_const(mFiddle, "TYPE_UINTPTR_T", INT2NUM(TYPE_UINTPTR_T));
/* Document-const: ALIGN_VOIDP
*
* The alignment size of a void*
*/
rb_define_const(mFiddle, "ALIGN_VOIDP", INT2NUM(ALIGN_VOIDP));
/* Document-const: ALIGN_CHAR
*
* The alignment size of a char
*/
rb_define_const(mFiddle, "ALIGN_CHAR", INT2NUM(ALIGN_CHAR));
/* Document-const: ALIGN_SHORT
*
* The alignment size of a short
*/
rb_define_const(mFiddle, "ALIGN_SHORT", INT2NUM(ALIGN_SHORT));
/* Document-const: ALIGN_INT
*
* The alignment size of an int
*/
rb_define_const(mFiddle, "ALIGN_INT", INT2NUM(ALIGN_INT));
/* Document-const: ALIGN_LONG
*
* The alignment size of a long
*/
rb_define_const(mFiddle, "ALIGN_LONG", INT2NUM(ALIGN_LONG));
#if HAVE_LONG_LONG
/* Document-const: ALIGN_LONG_LONG
*
* The alignment size of a long long
*/
rb_define_const(mFiddle, "ALIGN_LONG_LONG", INT2NUM(ALIGN_LONG_LONG));
#endif
/* Document-const: ALIGN_FLOAT
*
* The alignment size of a float
*/
rb_define_const(mFiddle, "ALIGN_FLOAT", INT2NUM(ALIGN_FLOAT));
/* Document-const: ALIGN_DOUBLE
*
* The alignment size of a double
*/
rb_define_const(mFiddle, "ALIGN_DOUBLE",INT2NUM(ALIGN_DOUBLE));
/* Document-const: ALIGN_SIZE_T
*
* The alignment size of a size_t
*/
rb_define_const(mFiddle, "ALIGN_SIZE_T", INT2NUM(ALIGN_OF(size_t)));
/* Document-const: ALIGN_SSIZE_T
*
* The alignment size of a ssize_t
*/
rb_define_const(mFiddle, "ALIGN_SSIZE_T", INT2NUM(ALIGN_OF(size_t))); /* same as size_t */
/* Document-const: ALIGN_PTRDIFF_T
*
* The alignment size of a ptrdiff_t
*/
rb_define_const(mFiddle, "ALIGN_PTRDIFF_T", INT2NUM(ALIGN_OF(ptrdiff_t)));
/* Document-const: ALIGN_INTPTR_T
*
* The alignment size of a intptr_t
*/
rb_define_const(mFiddle, "ALIGN_INTPTR_T", INT2NUM(ALIGN_OF(intptr_t)));
/* Document-const: ALIGN_UINTPTR_T
*
* The alignment size of a uintptr_t
*/
rb_define_const(mFiddle, "ALIGN_UINTPTR_T", INT2NUM(ALIGN_OF(uintptr_t)));
/* Document-const: WINDOWS
*
* Returns a boolean regarding whether the host is WIN32
*/
#if defined(_WIN32)
rb_define_const(mFiddle, "WINDOWS", Qtrue);
#else
rb_define_const(mFiddle, "WINDOWS", Qfalse);
#endif
/* Document-const: SIZEOF_VOIDP
*
* size of a void*
*/
rb_define_const(mFiddle, "SIZEOF_VOIDP", INT2NUM(sizeof(void*)));
/* Document-const: SIZEOF_CHAR
*
* size of a char
*/
rb_define_const(mFiddle, "SIZEOF_CHAR", INT2NUM(sizeof(char)));
/* Document-const: SIZEOF_SHORT
*
* size of a short
*/
rb_define_const(mFiddle, "SIZEOF_SHORT", INT2NUM(sizeof(short)));
/* Document-const: SIZEOF_INT
*
* size of an int
*/
rb_define_const(mFiddle, "SIZEOF_INT", INT2NUM(sizeof(int)));
/* Document-const: SIZEOF_LONG
*
* size of a long
*/
rb_define_const(mFiddle, "SIZEOF_LONG", INT2NUM(sizeof(long)));
#if HAVE_LONG_LONG
/* Document-const: SIZEOF_LONG_LONG
*
* size of a long long
*/
rb_define_const(mFiddle, "SIZEOF_LONG_LONG", INT2NUM(sizeof(LONG_LONG)));
#endif
/* Document-const: SIZEOF_FLOAT
*
* size of a float
*/
rb_define_const(mFiddle, "SIZEOF_FLOAT", INT2NUM(sizeof(float)));
/* Document-const: SIZEOF_DOUBLE
*
* size of a double
*/
rb_define_const(mFiddle, "SIZEOF_DOUBLE",INT2NUM(sizeof(double)));
/* Document-const: SIZEOF_SIZE_T
*
* size of a size_t
*/
rb_define_const(mFiddle, "SIZEOF_SIZE_T", INT2NUM(sizeof(size_t)));
/* Document-const: SIZEOF_SSIZE_T
*
* size of a ssize_t
*/
rb_define_const(mFiddle, "SIZEOF_SSIZE_T", INT2NUM(sizeof(size_t))); /* same as size_t */
/* Document-const: SIZEOF_PTRDIFF_T
*
* size of a ptrdiff_t
*/
rb_define_const(mFiddle, "SIZEOF_PTRDIFF_T", INT2NUM(sizeof(ptrdiff_t)));
/* Document-const: SIZEOF_INTPTR_T
*
* size of a intptr_t
*/
rb_define_const(mFiddle, "SIZEOF_INTPTR_T", INT2NUM(sizeof(intptr_t)));
/* Document-const: SIZEOF_UINTPTR_T
*
* size of a uintptr_t
*/
rb_define_const(mFiddle, "SIZEOF_UINTPTR_T", INT2NUM(sizeof(uintptr_t)));
/* Document-const: RUBY_FREE
*
* Address of the ruby_xfree() function
*/
rb_define_const(mFiddle, "RUBY_FREE", PTR2NUM(ruby_xfree));
/* Document-const: BUILD_RUBY_PLATFORM
*
* Platform built against (i.e. "x86_64-linux", etc.)
*
* See also RUBY_PLATFORM
*/
rb_define_const(mFiddle, "BUILD_RUBY_PLATFORM", rb_str_new2(RUBY_PLATFORM));
rb_define_module_function(mFiddle, "dlwrap", rb_fiddle_value2ptr, 1);
rb_define_module_function(mFiddle, "dlunwrap", rb_fiddle_ptr2value, 1);
rb_define_module_function(mFiddle, "malloc", rb_fiddle_malloc, 1);
rb_define_module_function(mFiddle, "realloc", rb_fiddle_realloc, 2);
rb_define_module_function(mFiddle, "free", rb_fiddle_free, 1);
Init_fiddle_function();
Init_fiddle_closure();
Init_fiddle_handle();
Init_fiddle_pointer();
}
void
callback(ffi_cif *cif, void *resp, void **args, void *ctx)
{
VALUE self = (VALUE)ctx;
VALUE rbargs = rb_iv_get(self, "@args");
VALUE ctype = rb_iv_get(self, "@ctype");
int argc = RARRAY_LENINT(rbargs);
VALUE params = rb_ary_tmp_new(argc);
VALUE ret;
VALUE cPointer;
int i, type;
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
for (i = 0; i < argc; i++) {
type = NUM2INT(RARRAY_PTR(rbargs)[i]);
switch (type) {
case TYPE_VOID:
argc = 0;
break;
case TYPE_INT:
rb_ary_push(params, INT2NUM(*(int *)args[i]));
break;
case -TYPE_INT:
rb_ary_push(params, UINT2NUM(*(unsigned int *)args[i]));
break;
case TYPE_VOIDP:
rb_ary_push(params,
rb_funcall(cPointer, rb_intern("[]"), 1,
PTR2NUM(*(void **)args[i])));
break;
case TYPE_LONG:
rb_ary_push(params, LONG2NUM(*(long *)args[i]));
break;
case -TYPE_LONG:
rb_ary_push(params, ULONG2NUM(*(unsigned long *)args[i]));
break;
case TYPE_CHAR:
rb_ary_push(params, INT2NUM(*(signed char *)args[i]));
break;
case -TYPE_CHAR:
rb_ary_push(params, UINT2NUM(*(unsigned char *)args[i]));
break;
case TYPE_SHORT:
rb_ary_push(params, INT2NUM(*(signed short *)args[i]));
break;
case -TYPE_SHORT:
rb_ary_push(params, UINT2NUM(*(unsigned short *)args[i]));
break;
case TYPE_DOUBLE:
rb_ary_push(params, rb_float_new(*(double *)args[i]));
break;
case TYPE_FLOAT:
rb_ary_push(params, rb_float_new(*(float *)args[i]));
break;
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
rb_ary_push(params, LL2NUM(*(LONG_LONG *)args[i]));
break;
case -TYPE_LONG_LONG:
rb_ary_push(params, ULL2NUM(*(unsigned LONG_LONG *)args[i]));
break;
#endif
default:
rb_raise(rb_eRuntimeError, "closure args: %d", type);
}
}
ret = rb_funcall2(self, rb_intern("call"), argc, RARRAY_PTR(params));
RB_GC_GUARD(params);
type = NUM2INT(ctype);
switch (type) {
case TYPE_VOID:
break;
case TYPE_LONG:
*(long *)resp = NUM2LONG(ret);
break;
case -TYPE_LONG:
*(unsigned long *)resp = NUM2ULONG(ret);
break;
case TYPE_CHAR:
case TYPE_SHORT:
case TYPE_INT:
*(ffi_sarg *)resp = NUM2INT(ret);
break;
case -TYPE_CHAR:
case -TYPE_SHORT:
case -TYPE_INT:
*(ffi_arg *)resp = NUM2UINT(ret);
break;
case TYPE_VOIDP:
*(void **)resp = NUM2PTR(ret);
break;
case TYPE_DOUBLE:
*(double *)resp = NUM2DBL(ret);
break;
case TYPE_FLOAT:
*(float *)resp = (float)NUM2DBL(ret);
break;
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
*(LONG_LONG *)resp = NUM2LL(ret);
break;
case -TYPE_LONG_LONG:
*(unsigned LONG_LONG *)resp = NUM2ULL(ret);
break;
#endif
default:
rb_raise(rb_eRuntimeError, "closure retval: %d", type);
}
}
VALUE
rb_dlhandle_sym(VALUE self, VALUE sym)
{
void (*func)();
struct dl_handle *dlhandle;
void *handle;
const char *name;
const char *err;
int i;
#if defined(HAVE_DLERROR)
# define CHECK_DLERROR if( err = dlerror() ){ func = 0; }
#else
# define CHECK_DLERROR
#endif
rb_secure(2);
if( sym == Qnil ){
#if defined(RTLD_NEXT)
name = RTLD_NEXT;
#else
name = NULL;
#endif
}
else{
name = StringValuePtr(sym);
}
Data_Get_Struct(self, struct dl_handle, dlhandle);
if( ! dlhandle->open ){
rb_raise(rb_eDLError, "closed handle");
}
handle = dlhandle->ptr;
func = dlsym(handle, name);
CHECK_DLERROR;
if( !func ){
#if defined(__CYGWIN__) || defined(WIN32) || defined(__MINGW32__)
{
int len = strlen(name);
char *name_a = (char*)xmalloc(len+2);
strcpy(name_a, name);
name_a[len] = 'A';
name_a[len+1] = '\0';
func = dlsym(handle, name_a);
xfree(name_a);
CHECK_DLERROR;
if( !func ){
for( i = 0; i < 256; i += 4 ){
int len = strlen(name);
char *name_n = (char*)xmalloc(len+5);
sprintf(name_n, "%s@%d%c", name, i, 0);
func = dlsym(handle, name_n);
xfree(name_n);
CHECK_DLERROR;
if( func )
{
break;
}
}
CHECK_DLERROR;
if( !func ){
rb_raise(rb_eDLError, "unknown symbol \"%s\"", name);
}
}
}
#else
for( i = 0; i < 256; i += 4 ){
int len = strlen(name);
char *name_n = (char*)xmalloc(len+4);
sprintf(name_n, "%s@%d", name, i);
func = dlsym(handle, name_n);
xfree(name_n);
CHECK_DLERROR;
if( func ){
break;
}
}
CHECK_DLERROR;
if( !func ){
rb_raise(rb_eDLError, "unknown symbol \"%s\"", name);
}
#endif
}
return PTR2NUM(func);
}
void
callback(ffi_cif *cif, void *resp, void **args, void *ctx)
{
VALUE self = (VALUE)ctx;
VALUE rbargs = rb_iv_get(self, "@args");
VALUE ctype = rb_iv_get(self, "@ctype");
int argc = RARRAY_LENINT(rbargs);
VALUE *params = xcalloc(argc, sizeof(VALUE *));
VALUE ret;
VALUE cPointer;
int i, type;
cPointer = rb_const_get(mFiddle, rb_intern("Pointer"));
for (i = 0; i < argc; i++) {
type = NUM2INT(RARRAY_PTR(rbargs)[i]);
switch (type) {
case TYPE_VOID:
argc = 0;
break;
case TYPE_INT:
params[i] = INT2NUM(*(int *)args[i]);
break;
case TYPE_VOIDP:
params[i] = rb_funcall(cPointer, rb_intern("[]"), 1,
PTR2NUM(*(void **)args[i]));
break;
case TYPE_LONG:
params[i] = LONG2NUM(*(long *)args[i]);
break;
case TYPE_CHAR:
params[i] = INT2NUM(*(char *)args[i]);
break;
case TYPE_DOUBLE:
params[i] = rb_float_new(*(double *)args[i]);
break;
case TYPE_FLOAT:
params[i] = rb_float_new(*(float *)args[i]);
break;
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
params[i] = rb_ull2inum(*(unsigned LONG_LONG *)args[i]);
break;
#endif
default:
rb_raise(rb_eRuntimeError, "closure args: %d", type);
}
}
ret = rb_funcall2(self, rb_intern("call"), argc, params);
type = NUM2INT(ctype);
switch (type) {
case TYPE_VOID:
break;
case TYPE_LONG:
*(long *)resp = NUM2LONG(ret);
break;
case TYPE_CHAR:
*(char *)resp = NUM2INT(ret);
break;
case TYPE_VOIDP:
*(void **)resp = NUM2PTR(ret);
break;
case TYPE_INT:
*(int *)resp = NUM2INT(ret);
break;
case TYPE_DOUBLE:
*(double *)resp = NUM2DBL(ret);
break;
case TYPE_FLOAT:
*(float *)resp = (float)NUM2DBL(ret);
break;
#if HAVE_LONG_LONG
case TYPE_LONG_LONG:
*(unsigned LONG_LONG *)resp = rb_big2ull(ret);
break;
#endif
default:
rb_raise(rb_eRuntimeError, "closure retval: %d", type);
}
xfree(params);
}
void
Init_dl(void)
{
void Init_dlhandle(void);
void Init_dlcfunc(void);
void Init_dlptr(void);
rbdl_id_cdecl = rb_intern_const("cdecl");
rbdl_id_stdcall = rb_intern_const("stdcall");
/* Document-module: DL
*
* A bridge to the dlopen() or dynamic library linker function.
*
* == Example
*
* bash $> cat > sum.c <<EOF
* double sum(double *arry, int len)
* {
* double ret = 0;
* int i;
* for(i = 0; i < len; i++){
* ret = ret + arry[i];
* }
* return ret;
* }
*
* double split(double num)
* {
* double ret = 0;
* ret = num / 2;
* return ret;
* }
* EOF
* bash $> gcc -o libsum.so -shared sum.c
* bash $> cat > sum.rb <<EOF
* require 'dl'
* require 'dl/import'
*
* module LibSum
* extend DL::Importer
* dlload './libsum.so'
* extern 'double sum(double*, int)'
* extern 'double split(double)'
* end
*
* a = [2.0, 3.0, 4.0]
*
* sum = LibSum.sum(a.pack("d*"), a.count)
* p LibSum.split(sum)
* EOF
* bash $> ruby sum.rb
* 4.5
*
* WIN! :-)
*/
rb_mDL = rb_define_module("DL");
/*
* Document-class: DL::DLError
*
* standard dynamic load exception
*/
rb_eDLError = rb_define_class_under(rb_mDL, "DLError", rb_eStandardError);
/*
* Document-class: DL::DLTypeError
*
* dynamic load incorrect type exception
*/
rb_eDLTypeError = rb_define_class_under(rb_mDL, "DLTypeError", rb_eDLError);
/* Document-const: MAX_CALLBACK
*
* Maximum number of callbacks
*/
rb_define_const(rb_mDL, "MAX_CALLBACK", INT2NUM(MAX_CALLBACK));
/* Document-const: DLSTACK_SIZE
*
* Dynamic linker stack size
*/
rb_define_const(rb_mDL, "DLSTACK_SIZE", INT2NUM(DLSTACK_SIZE));
rb_dl_init_callbacks(rb_mDL);
/* Document-const: RTLD_GLOBAL
*
* rtld DL::Handle flag.
*
* The symbols defined by this library will be made available for symbol
* resolution of subsequently loaded libraries.
*/
rb_define_const(rb_mDL, "RTLD_GLOBAL", INT2NUM(RTLD_GLOBAL));
/* Document-const: RTLD_LAZY
*
* rtld DL::Handle flag.
*
* Perform lazy binding. Only resolve symbols as the code that references
* them is executed. If the symbol is never referenced, then it is never
* resolved. (Lazy binding is only performed for function references;
* references to variables are always immediately bound when the library
* is loaded.)
*/
rb_define_const(rb_mDL, "RTLD_LAZY", INT2NUM(RTLD_LAZY));
/* Document-const: RTLD_NOW
*
* rtld DL::Handle flag.
*
* If this value is specified or the environment variable LD_BIND_NOW is
* set to a nonempty string, all undefined symbols in the library are
* resolved before dlopen() returns. If this cannot be done an error is
* returned.
*/
rb_define_const(rb_mDL, "RTLD_NOW", INT2NUM(RTLD_NOW));
/* Document-const: TYPE_VOID
*
* DL::CFunc type - void
*/
rb_define_const(rb_mDL, "TYPE_VOID", INT2NUM(DLTYPE_VOID));
/* Document-const: TYPE_VOIDP
*
* DL::CFunc type - void*
*/
rb_define_const(rb_mDL, "TYPE_VOIDP", INT2NUM(DLTYPE_VOIDP));
/* Document-const: TYPE_CHAR
*
* DL::CFunc type - char
*/
rb_define_const(rb_mDL, "TYPE_CHAR", INT2NUM(DLTYPE_CHAR));
/* Document-const: TYPE_SHORT
*
* DL::CFunc type - short
*/
rb_define_const(rb_mDL, "TYPE_SHORT", INT2NUM(DLTYPE_SHORT));
/* Document-const: TYPE_INT
*
* DL::CFunc type - int
*/
rb_define_const(rb_mDL, "TYPE_INT", INT2NUM(DLTYPE_INT));
/* Document-const: TYPE_LONG
*
* DL::CFunc type - long
*/
rb_define_const(rb_mDL, "TYPE_LONG", INT2NUM(DLTYPE_LONG));
#if HAVE_LONG_LONG
/* Document-const: TYPE_LONG_LONG
*
* DL::CFunc type - long long
*/
rb_define_const(rb_mDL, "TYPE_LONG_LONG", INT2NUM(DLTYPE_LONG_LONG));
#endif
/* Document-const: TYPE_FLOAT
*
* DL::CFunc type - float
*/
rb_define_const(rb_mDL, "TYPE_FLOAT", INT2NUM(DLTYPE_FLOAT));
/* Document-const: TYPE_DOUBLE
*
* DL::CFunc type - double
*/
rb_define_const(rb_mDL, "TYPE_DOUBLE", INT2NUM(DLTYPE_DOUBLE));
/* Document-const: ALIGN_VOIDP
*
* The Offset of a struct void* and a void*
*/
rb_define_const(rb_mDL, "ALIGN_VOIDP", INT2NUM(ALIGN_VOIDP));
/* Document-const: ALIGN_CHAR
*
* The Offset of a struct char and a char
*/
rb_define_const(rb_mDL, "ALIGN_CHAR", INT2NUM(ALIGN_CHAR));
/* Document-const: ALIGN_SHORT
*
* The Offset of a struct short and a short
*/
rb_define_const(rb_mDL, "ALIGN_SHORT", INT2NUM(ALIGN_SHORT));
/* Document-const: ALIGN_INT
*
* The Offset of a struct int and a int
*/
rb_define_const(rb_mDL, "ALIGN_INT", INT2NUM(ALIGN_INT));
/* Document-const: ALIGN_LONG
*
* The Offset of a struct long and a long
*/
rb_define_const(rb_mDL, "ALIGN_LONG", INT2NUM(ALIGN_LONG));
#if HAVE_LONG_LONG
/* Document-const: ALIGN_LONG_LONG
*
* The Offset of a struct long long and a long long
*/
rb_define_const(rb_mDL, "ALIGN_LONG_LONG", INT2NUM(ALIGN_LONG_LONG));
#endif
/* Document-const: ALIGN_FLOAT
*
* The Offset of a struct float and a float
*/
rb_define_const(rb_mDL, "ALIGN_FLOAT", INT2NUM(ALIGN_FLOAT));
/* Document-const: ALIGN_DOUBLE
*
* The Offset of a struct double and a double
*/
rb_define_const(rb_mDL, "ALIGN_DOUBLE",INT2NUM(ALIGN_DOUBLE));
/* Document-const: SIZEOF_VOIDP
*
* OS Dependent - sizeof(void*)
*/
rb_define_const(rb_mDL, "SIZEOF_VOIDP", INT2NUM(sizeof(void*)));
/* Document-const: SIZEOF_CHAR
*
* OS Dependent - sizeof(char)
*/
rb_define_const(rb_mDL, "SIZEOF_CHAR", INT2NUM(sizeof(char)));
/* Document-const: SIZEOF_SHORT
*
* OS Dependent - sizeof(short)
*/
rb_define_const(rb_mDL, "SIZEOF_SHORT", INT2NUM(sizeof(short)));
/* Document-const: SIZEOF_INT
*
* OS Dependent - sizeof(int)
*/
rb_define_const(rb_mDL, "SIZEOF_INT", INT2NUM(sizeof(int)));
/* Document-const: SIZEOF_LONG
*
* OS Dependent - sizeof(long)
*/
rb_define_const(rb_mDL, "SIZEOF_LONG", INT2NUM(sizeof(long)));
#if HAVE_LONG_LONG
/* Document-const: SIZEOF_LONG_LONG
*
* OS Dependent - sizeof(long long)
*/
rb_define_const(rb_mDL, "SIZEOF_LONG_LONG", INT2NUM(sizeof(LONG_LONG)));
#endif
/* Document-const: SIZEOF_FLOAT
*
* OS Dependent - sizeof(float)
*/
rb_define_const(rb_mDL, "SIZEOF_FLOAT", INT2NUM(sizeof(float)));
/* Document-const: SIZEOF_DOUBLE
*
* OS Dependent - sizeof(double)
*/
rb_define_const(rb_mDL, "SIZEOF_DOUBLE",INT2NUM(sizeof(double)));
rb_define_module_function(rb_mDL, "dlwrap", rb_dl_value2ptr, 1);
rb_define_module_function(rb_mDL, "dlunwrap", rb_dl_ptr2value, 1);
rb_define_module_function(rb_mDL, "dlopen", rb_dl_dlopen, -1);
rb_define_module_function(rb_mDL, "malloc", rb_dl_malloc, 1);
rb_define_module_function(rb_mDL, "realloc", rb_dl_realloc, 2);
rb_define_module_function(rb_mDL, "free", rb_dl_free, 1);
/* Document-const: RUBY_FREE
*
* Address of the ruby_xfree() function
*/
rb_define_const(rb_mDL, "RUBY_FREE", PTR2NUM(ruby_xfree));
/* Document-const: BUILD_RUBY_PLATFORM
*
* Platform built against (i.e. "x86_64-linux", etc.)
*
* See also RUBY_PLATFORM
*/
rb_define_const(rb_mDL, "BUILD_RUBY_PLATFORM", rb_str_new2(RUBY_PLATFORM));
/* Document-const: BUILD_RUBY_VERSION
*
* Ruby Version built. (i.e. "1.9.3")
*
* See also RUBY_VERSION
*/
rb_define_const(rb_mDL, "BUILD_RUBY_VERSION", rb_str_new2(RUBY_VERSION));
Init_dlhandle();
Init_dlcfunc();
Init_dlptr();
}
/*
* call-seq: Fiddle.dlwrap(val)
*
* Returns a memory pointer of a function's hexadecimal address location +val+
*
* Example:
*
* lib = Fiddle.dlopen('/lib64/libc-2.15.so')
* => #<Fiddle::Handle:0x00000001342460>
*
* Fiddle.dlwrap(lib['strcpy'].to_s(16))
* => 25522520
*/
static VALUE
rb_fiddle_value2ptr(VALUE self, VALUE val)
{
return PTR2NUM((void*)val);
}
