+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include "util.h"
-#include "bus-type.h"
-#include "bus-gvariant.h"
-#include "bus-signature.h"
-
-int bus_gvariant_get_size(const char *signature) {
- const char *p;
- int sum = 0, r;
-
- /* For fixed size structs. Fails for variable size structs. */
-
- p = signature;
- while (*p != 0) {
- size_t n;
-
- r = signature_element_length(p, &n);
- if (r < 0)
- return r;
- else {
- char t[n+1];
-
- memcpy(t, p, n);
- t[n] = 0;
-
- r = bus_gvariant_get_alignment(t);
- if (r < 0)
- return r;
-
- sum = ALIGN_TO(sum, r);
- }
-
- switch (*p) {
-
- case SD_BUS_TYPE_BOOLEAN:
- case SD_BUS_TYPE_BYTE:
- sum += 1;
- break;
-
- case SD_BUS_TYPE_INT16:
- case SD_BUS_TYPE_UINT16:
- sum += 2;
- break;
-
- case SD_BUS_TYPE_INT32:
- case SD_BUS_TYPE_UINT32:
- case SD_BUS_TYPE_UNIX_FD:
- sum += 4;
- break;
-
- case SD_BUS_TYPE_INT64:
- case SD_BUS_TYPE_UINT64:
- case SD_BUS_TYPE_DOUBLE:
- sum += 8;
- break;
-
- case SD_BUS_TYPE_STRUCT_BEGIN:
- case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
- char t[n-1];
-
- memcpy(t, p + 1, n - 2);
- t[n - 2] = 0;
-
- r = bus_gvariant_get_size(t);
- if (r < 0)
- return r;
-
- sum += r;
- break;
- }
-
- case SD_BUS_TYPE_STRING:
- case SD_BUS_TYPE_OBJECT_PATH:
- case SD_BUS_TYPE_SIGNATURE:
- case SD_BUS_TYPE_ARRAY:
- case SD_BUS_TYPE_VARIANT:
- return -EINVAL;
-
- default:
- assert_not_reached("Unknown signature type");
- }
-
- p += n;
- }
-
- r = bus_gvariant_get_alignment(signature);
- if (r < 0)
- return r;
-
- return ALIGN_TO(sum, r);
-}
-
-int bus_gvariant_get_alignment(const char *signature) {
- size_t alignment = 1;
- const char *p;
- int r;
-
- p = signature;
- while (*p != 0 && alignment < 8) {
- size_t n;
- int a;
-
- r = signature_element_length(p, &n);
- if (r < 0)
- return r;
-
- switch (*p) {
-
- case SD_BUS_TYPE_BYTE:
- case SD_BUS_TYPE_BOOLEAN:
- case SD_BUS_TYPE_STRING:
- case SD_BUS_TYPE_OBJECT_PATH:
- case SD_BUS_TYPE_SIGNATURE:
- a = 1;
- break;
-
- case SD_BUS_TYPE_INT16:
- case SD_BUS_TYPE_UINT16:
- a = 2;
- break;
-
- case SD_BUS_TYPE_INT32:
- case SD_BUS_TYPE_UINT32:
- case SD_BUS_TYPE_UNIX_FD:
- a = 4;
- break;
-
- case SD_BUS_TYPE_INT64:
- case SD_BUS_TYPE_UINT64:
- case SD_BUS_TYPE_DOUBLE:
- case SD_BUS_TYPE_VARIANT:
- a = 8;
- break;
-
- case SD_BUS_TYPE_ARRAY: {
- char t[n];
-
- memcpy(t, p + 1, n - 1);
- t[n - 1] = 0;
-
- a = bus_gvariant_get_alignment(t);
- break;
- }
-
- case SD_BUS_TYPE_STRUCT_BEGIN:
- case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
- char t[n-1];
-
- memcpy(t, p + 1, n - 2);
- t[n - 2] = 0;
-
- a = bus_gvariant_get_alignment(t);
- break;
- }
-
- default:
- assert_not_reached("Unknown signature type");
- }
-
- if (a < 0)
- return a;
-
- assert(a > 0 && a <= 8);
- if ((size_t) a > alignment)
- alignment = (size_t) a;
-
- p += n;
- }
-
- return alignment;
-}
-
-int bus_gvariant_is_fixed_size(const char *signature) {
- const char *p;
- int r;
-
- assert(signature);
-
- p = signature;
- while (*p != 0) {
- size_t n;
-
- r = signature_element_length(p, &n);
- if (r < 0)
- return r;
-
- switch (*p) {
-
- case SD_BUS_TYPE_STRING:
- case SD_BUS_TYPE_OBJECT_PATH:
- case SD_BUS_TYPE_SIGNATURE:
- case SD_BUS_TYPE_ARRAY:
- case SD_BUS_TYPE_VARIANT:
- return 0;
-
- case SD_BUS_TYPE_BYTE:
- case SD_BUS_TYPE_BOOLEAN:
- case SD_BUS_TYPE_INT16:
- case SD_BUS_TYPE_UINT16:
- case SD_BUS_TYPE_INT32:
- case SD_BUS_TYPE_UINT32:
- case SD_BUS_TYPE_UNIX_FD:
- case SD_BUS_TYPE_INT64:
- case SD_BUS_TYPE_UINT64:
- case SD_BUS_TYPE_DOUBLE:
- break;
-
- case SD_BUS_TYPE_STRUCT_BEGIN:
- case SD_BUS_TYPE_DICT_ENTRY_BEGIN: {
- char t[n-1];
-
- memcpy(t, p + 1, n - 2);
- t[n - 2] = 0;
-
- r = bus_gvariant_is_fixed_size(t);
- if (r <= 0)
- return r;
- break;
- }
-
- default:
- assert_not_reached("Unknown signature type");
- }
-
- p += n;
- }
-
- return true;
-}
~ianmdlvl / elogind.git / blobdiff