diff options
Diffstat (limited to 'libmisc')
| -rw-r--r-- | libmisc/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | libmisc/include/libmisc/linkedlist.h | 57 | ||||
| -rw-r--r-- | libmisc/linkedlist.c | 62 |
3 files changed, 120 insertions, 0 deletions
diff --git a/libmisc/CMakeLists.txt b/libmisc/CMakeLists.txt index 4599ead..c80e060 100644 --- a/libmisc/CMakeLists.txt +++ b/libmisc/CMakeLists.txt @@ -8,6 +8,7 @@ target_include_directories(libmisc PUBLIC INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/ target_sources(libmisc INTERFACE assert.c intercept.c + linkedlist.c log.c ) target_compile_options(libmisc INTERFACE "$<$<COMPILE_LANGUAGE:C>:-fplan9-extensions>") diff --git a/libmisc/include/libmisc/linkedlist.h b/libmisc/include/libmisc/linkedlist.h new file mode 100644 index 0000000..045a468 --- /dev/null +++ b/libmisc/include/libmisc/linkedlist.h @@ -0,0 +1,57 @@ +/* libmisc/linkedlist.h - Singly- and doubly- linked lists + * + * Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com> + * SPDX-License-Identifier: AGPL-3.0-or-later + */ + +#ifndef _LIBMISC_LINKEDLIST_H_ +#define _LIBMISC_LINKEDLIST_H_ + +#include <libmisc/assert.h> + +/* singly linked list *********************************************************/ + +typedef struct _lm_sll_node { + struct _lm_sll_node *rear; +} lm_sll_node; + +typedef struct { + lm_sll_node *front, *rear; +} lm_sll_root; + +#define lm_sll_node_cast(node_typ, node_ptr) \ + ({ \ + static_assert(_Generic(node_ptr, lm_sll_node *: 1, default: 0), \ + "typeof("#node_ptr") != lm_sll_node *"); \ + assert(node_ptr); \ + static_assert(offsetof(node_typ, lm_sll_node) == 0); \ + ((node_typ*)(node_ptr)); \ + }) + +void lm_sll_push_to_rear(lm_sll_root *root, lm_sll_node *node); +void lm_sll_pop_from_front(lm_sll_root *root); + +/* doubly linked list *********************************************************/ + +typedef struct _lm_dll_node { + struct _lm_dll_node *front, *rear; +} lm_dll_node; + +typedef struct { + lm_dll_node *front, *rear; +} lm_dll_root; + +#define lm_dll_node_cast(node_typ, node_ptr) \ + ({ \ + static_assert(_Generic(node_ptr, lm_dll_node *: 1, default: 0), \ + "typeof("#node_ptr") != lm_dll_node *"); \ + assert(node_ptr); \ + static_assert(offsetof(node_typ, lm_dll_node) == 0); \ + ((node_typ*)(node_ptr)); \ + }) + +void lm_dll_push_to_rear(lm_dll_root *root, lm_dll_node *node); +void lm_dll_remove(lm_dll_root *root, lm_dll_node *node); +void lm_dll_pop_from_front(lm_dll_root *root); + +#endif /* _LIBMISC_LINKEDLIST_H_ */ diff --git a/libmisc/linkedlist.c b/libmisc/linkedlist.c new file mode 100644 index 0000000..5fe0977 --- /dev/null +++ b/libmisc/linkedlist.c @@ -0,0 +1,62 @@ +/* libmisc/linkedlist.c - Singly- and doubly- linked lists + * + * Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com> + * SPDX-License-Identifier: AGPL-3.0-or-later + */ + +#include <stddef.h> /* for NULL */ + +#include <libmisc/linkedlist.h> + +/* singly linked list *********************************************************/ + +void lm_sll_push_to_rear(lm_sll_root *root, lm_sll_node *node) { + assert(root); + node->rear = NULL; + if (root->rear) + root->rear->rear = node; + else + root->front = node; + root->rear = node; +} + +void lm_sll_pop_from_front(lm_sll_root *root) { + assert(root); + assert(root->front); + root->front = root->front->rear; + if (!root->front) + root->rear = NULL; +} + +/* doubly linked list *********************************************************/ + +void lm_dll_push_to_rear(lm_dll_root *root, lm_dll_node *node) { + assert(root); + assert(node); + node->front = root->rear; + node->rear = NULL; + if (root->rear) + root->rear->rear = node; + else + root->front = node; + root->rear = node; +} + +void lm_dll_remove(lm_dll_root *root, lm_dll_node *node) { + assert(root); + assert(node); + if (node->front) + node->front->rear = node->rear; + else + root->front = node->rear; + if (node->rear) + node->rear->front = node->front; + else + root->rear = node->front; +} + +void lm_dll_pop_from_front(lm_dll_root *root) { + assert(root); + assert(root->front); + lm_dll_remove(root, root->front); +} |