projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 01dc0eed JG |
1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
| 6 | * as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
| 11 | * for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU Lesser General Public License | |
| 14 | * along with this program; if not, write to the Free Software Foundation, | |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 16 | */ | |
| 17 | ||
| 18 | #include <common/buffer-view.h> | |
| 19 | #include <common/dynamic-buffer.h> | |
| 01dc0eed JG |
20 | #include <common/error.h> |
| 21 | #include <assert.h> | |
| 22 | ||
| b35aac84 JG |
23 | LTTNG_HIDDEN |
| 24 | struct lttng_buffer_view lttng_buffer_view_init( | |
| 25 | const char *src, size_t offset, ptrdiff_t len) | |
| 26 | { | |
| 27 | struct lttng_buffer_view view = { .data = src + offset, .size = len }; | |
| 28 | return view; | |
| 29 | } | |
| 30 | ||
| ff28f865 | 31 | LTTNG_HIDDEN |
| 01dc0eed JG |
32 | struct lttng_buffer_view lttng_buffer_view_from_view( |
| 33 | const struct lttng_buffer_view *src, size_t offset, | |
| 34 | ptrdiff_t len) | |
| 35 | { | |
| 36 | struct lttng_buffer_view view = { .data = NULL, .size = 0 }; | |
| 37 | ||
| 38 | assert(src); | |
| 39 | ||
| 40 | if (offset > src->size) { | |
| 41 | ERR("Attempt to create buffer view with invalid offset"); | |
| 42 | goto end; | |
| 43 | } | |
| 44 | ||
| 45 | if (len != -1 && len > (src->size - offset)) { | |
| 46 | ERR("Attempt to create buffer view with invalid length"); | |
| 47 | goto end; | |
| 48 | } | |
| 49 | ||
| 50 | view.data = src->data + offset; | |
| 51 | view.size = len == -1 ? (src->size - offset) : len; | |
| 52 | end: | |
| 53 | return view; | |
| 54 | } | |
| 55 | ||
| ff28f865 | 56 | LTTNG_HIDDEN |
| 01dc0eed JG |
57 | struct lttng_buffer_view lttng_buffer_view_from_dynamic_buffer( |
| 58 | const struct lttng_dynamic_buffer *src, size_t offset, | |
| 59 | ptrdiff_t len) | |
| 60 | { | |
| 61 | struct lttng_buffer_view view = { .data = NULL, .size = 0 }; | |
| 62 | ||
| 63 | assert(src); | |
| 64 | ||
| 65 | if (offset > src->size) { | |
| 66 | ERR("Attempt to create buffer view with invalid offset"); | |
| 67 | goto end; | |
| 68 | } | |
| 69 | ||
| 70 | if (len != -1 && len > (src->size - offset)) { | |
| 71 | ERR("Attempt to create buffer view with invalid length"); | |
| 72 | goto end; | |
| 73 | } | |
| 74 | ||
| 75 | view.data = src->data + offset; | |
| 76 | view.size = len == -1 ? (src->size - offset) : len; | |
| 77 | end: | |
| 78 | return view; | |
| 79 | } |