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Diffstat (limited to 'libgo/runtime/go-reflect.c')
| -rw-r--r-- | libgo/runtime/go-reflect.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/libgo/runtime/go-reflect.c b/libgo/runtime/go-reflect.c deleted file mode 100644 index d14a580..0000000 --- a/libgo/runtime/go-reflect.c +++ /dev/null @@ -1,192 +0,0 @@ -/* go-reflect.c -- implement unsafe.Reflect and unsafe.Typeof for Go. - - Copyright 2009 The Go Authors. All rights reserved. - Use of this source code is governed by a BSD-style - license that can be found in the LICENSE file. */ - -#include <stdlib.h> -#include <stdint.h> - -#include "runtime.h" -#include "interface.h" -#include "go-alloc.h" -#include "go-string.h" -#include "go-type.h" - -/* For field alignment. */ - -struct field_align -{ - char c; - struct __go_type_descriptor *p; -}; - -/* The type descriptors in the runtime package. */ - -extern const struct __go_type_descriptor ptr_bool_descriptor - asm ("__go_td_pN30_libgo_runtime.runtime.BoolType"); -extern const struct __go_type_descriptor ptr_float_descriptor - asm ("__go_td_pN31_libgo_runtime.runtime.FloatType"); -extern const struct __go_type_descriptor ptr_complex_descriptor - asm ("__go_td_pN33_libgo_runtime.runtime.ComplexType"); -extern const struct __go_type_descriptor ptr_int_descriptor - asm ("__go_td_pN29_libgo_runtime.runtime.IntType"); -extern const struct __go_type_descriptor ptr_uint_descriptor - asm ("__go_td_pN30_libgo_runtime.runtime.UintType"); -extern const struct __go_type_descriptor ptr_string_descriptor - asm ("__go_td_pN32_libgo_runtime.runtime.StringType"); -extern const struct __go_type_descriptor ptr_unsafe_pointer_decriptor - asm ("__go_td_pN39_libgo_runtime.runtime.UnsafePointerType"); -extern const struct __go_type_descriptor ptr_array_descriptor - asm ("__go_td_pN31_libgo_runtime.runtime.ArrayType"); -extern const struct __go_type_descriptor ptr_slice_descriptor - asm ("__go_td_pN31_libgo_runtime.runtime.SliceType"); -extern const struct __go_type_descriptor ptr_chan_descriptor - asm ("__go_td_pN30_libgo_runtime.runtime.ChanType"); -extern const struct __go_type_descriptor ptr_func_descriptor - asm ("__go_td_pN30_libgo_runtime.runtime.FuncType"); -extern const struct __go_type_descriptor ptr_interface_descriptor - asm ("__go_td_pN35_libgo_runtime.runtime.InterfaceType"); -extern const struct __go_type_descriptor ptr_map_descriptor - asm ("__go_td_pN29_libgo_runtime.runtime.MapType"); -extern const struct __go_type_descriptor ptr_ptr_descriptor - asm ("__go_td_pN29_libgo_runtime.runtime.PtrType"); -extern const struct __go_type_descriptor ptr_struct_descriptor - asm ("__go_td_pN32_libgo_runtime.runtime.StructType"); - -const struct __go_type_descriptor * -get_descriptor (int code) -{ - switch (code & GO_CODE_MASK) - { - case GO_BOOL: - return &ptr_bool_descriptor; - case GO_FLOAT32: - case GO_FLOAT64: - return &ptr_float_descriptor; - case GO_COMPLEX64: - case GO_COMPLEX128: - return &ptr_complex_descriptor; - case GO_INT16: - case GO_INT32: - case GO_INT64: - case GO_INT8: - case GO_INT: - return &ptr_int_descriptor; - case GO_UINT16: - case GO_UINT32: - case GO_UINT64: - case GO_UINT8: - case GO_UINTPTR: - case GO_UINT: - return &ptr_uint_descriptor; - case GO_STRING: - return &ptr_string_descriptor; - case GO_UNSAFE_POINTER: - return &ptr_unsafe_pointer_decriptor; - case GO_ARRAY: - return &ptr_array_descriptor; - case GO_SLICE: - return &ptr_slice_descriptor; - case GO_CHAN: - return &ptr_chan_descriptor; - case GO_FUNC: - return &ptr_func_descriptor; - case GO_INTERFACE: - return &ptr_interface_descriptor; - case GO_MAP: - return &ptr_map_descriptor; - case GO_PTR: - return &ptr_ptr_descriptor; - case GO_STRUCT: - return &ptr_struct_descriptor; - default: - abort (); - } -} - -/* Implement unsafe.Reflect. */ - -struct reflect_ret -{ - struct __go_empty_interface rettype; - void *addr; -}; - -struct reflect_ret Reflect (struct __go_empty_interface) - asm ("libgo_unsafe.unsafe.Reflect"); - -struct reflect_ret -Reflect (struct __go_empty_interface e) -{ - struct reflect_ret ret; - - if (((uintptr_t) e.__type_descriptor & reflectFlags) != 0) - runtime_panicstring ("invalid interface value"); - - if (e.__type_descriptor == NULL) - { - ret.rettype.__type_descriptor = NULL; - ret.rettype.__object = NULL; - ret.addr = NULL; - } - else - { - size_t size; - - ret.rettype.__type_descriptor = - get_descriptor (e.__type_descriptor->__code); - - /* This memcpy is really just an assignment of a const pointer - to a non-const pointer. FIXME: We should canonicalize this - pointer, so that for a given type we always return the same - pointer. */ - __builtin_memcpy (&ret.rettype.__object, &e.__type_descriptor, - sizeof (void *)); - - /* Make a copy of the value. */ - size = e.__type_descriptor->__size; - if (size <= sizeof (uint64_t)) - ret.addr = __go_alloc (sizeof (uint64_t)); - else - ret.addr = __go_alloc (size); - if (__go_is_pointer_type (e.__type_descriptor)) - *(void **) ret.addr = e.__object; - else - __builtin_memcpy (ret.addr, e.__object, size); - } - - return ret; -} - -/* Implement unsafe.Typeof. */ - -struct __go_empty_interface Typeof (struct __go_empty_interface) - asm ("libgo_unsafe.unsafe.Typeof"); - -struct __go_empty_interface -Typeof (const struct __go_empty_interface e) -{ - struct __go_empty_interface ret; - - if (((uintptr_t) e.__type_descriptor & reflectFlags) != 0) - runtime_panicstring ("invalid interface value"); - - if (e.__type_descriptor == NULL) - { - ret.__type_descriptor = NULL; - ret.__object = NULL; - } - else - { - ret.__type_descriptor = get_descriptor (e.__type_descriptor->__code); - - /* This memcpy is really just an assignment of a const pointer - to a non-const pointer. FIXME: We should canonicalize this - pointer, so that for a given type we always return the same - pointer. */ - __builtin_memcpy (&ret.__object, &e.__type_descriptor, sizeof (void *)); - } - - return ret; -} |