forked from TencentOS/TencentOS-tiny
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
/*----------------------------------------------------------------------------
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* Tencent is pleased to support the open source community by making TencentOS
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* available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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* If you have downloaded a copy of the TencentOS binary from Tencent, please
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* note that the TencentOS binary is licensed under the BSD 3-Clause License.
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*
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* If you have downloaded a copy of the TencentOS source code from Tencent,
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* please note that TencentOS source code is licensed under the BSD 3-Clause
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* License, except for the third-party components listed below which are
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* subject to different license terms. Your integration of TencentOS into your
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* own projects may require compliance with the BSD 3-Clause License, as well
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* as the other licenses applicable to the third-party components included
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* within TencentOS.
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*---------------------------------------------------------------------------*/
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#ifndef _GRAPH_H_
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#define _GRAPH_H_
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#include "list.h"
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#include "stack.h"
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// visited
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#define DFS_VISITED (1 << 0)
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// ring node
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#define DFS_R_NODE (1 << 1)
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// terminal node
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#define DFS_T_NODE (1 << 2)
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#define IS_VISITED(tag) ((tag) & DFS_VISITED)
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#define IS_T_NODE(tag) ((tag) & DFS_R_NODE)
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#define IS_R_NODE(tag) ((tag) & DFS_T_NODE)
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#define SET_VISITED(tag) ((tag) | DFS_VISITED)
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#define SET_R_NODE(tag) ((tag) | DFS_R_NODE)
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#define SET_T_NODE(tag) ((tag) | DFS_T_NODE)
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typedef uint8_t vertex_tag_t;
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typedef vertex_tag_t v_tag_t;
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/*
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head
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^
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tail
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*/
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typedef struct edge_st {
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int tail_vertex;
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int head_vertex;
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list_t tail_list; /* all the egdes with the same tail with us */
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list_t head_list; /* with same head */
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} edge_t;
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typedef struct vertex_st {
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list_t first_in;
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list_t first_out;
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int in_degree;
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int out_degree;
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v_tag_t tag;
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} vertex_t;
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typedef struct graph_st {
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vertex_t *vertexs;
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int vertexs_n;
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int edges_n;
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} graph_t;
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typedef struct depth_first_search_st {
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stack_t stack;
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graph_t *graph;
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} dfs_t;
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typedef void (*graph_edge_delete_cb)(int tail_vertex, int head_vertex, void *cb_arg);
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int graph_create(graph_t *graph, int vertexs_n);
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int graph_destroy(graph_t *graph);
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int graph_edge_add(graph_t *graph, int tail_vertex, int head_vertex);
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int graph_edge_rmv(graph_t *graph, int tail_vertex, int head_vertex);
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int graph_edge_rmv_by_tail(graph_t *graph, int tail_vertex, graph_edge_delete_cb del_cb, void *cb_arg);
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int graph_edge_rmv_one_by_tail(graph_t *graph, int tail_vertex);
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int graph_edge_rmv_by_head(graph_t *graph, int head_vertex, graph_edge_delete_cb del_cb, void *cb_arg);
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int graph_edge_rmv_one_by_head(graph_t *graph, int head_vertex);
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int graph_edgesn_get(graph_t *graph);
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int graph_vertex_max(graph_t *graph);
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int graph_indegree_get(graph_t *graph, int vertex);
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int graph_outdegree_get(graph_t *graph, int vertex);
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int graph_tag_set(graph_t *graph, int vertex, v_tag_t tag);
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int graph_tag_reset(graph_t *graph, int vertex);
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v_tag_t graph_tag_get(graph_t *graph, int vertex);
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int graph_dfs_create(dfs_t *dfs, graph_t *graph);
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int graph_dfs_destroy(dfs_t *dfs);
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int graph_dfs_has_next(dfs_t *dfs);
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int graph_dfs_ring_detect(dfs_t *dfs, int *ring_size);
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int graph_out_print(graph_t *graph);
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int graph_in_print(graph_t *graph);
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static inline void graph_vertex_set_visited(graph_t *graph, int vertex)
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{
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graph_tag_set(graph, vertex, SET_VISITED(graph_tag_get(graph, vertex)));
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}
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static inline void graph_vertex_set_rnode(graph_t *graph, int vertex)
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{
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graph_tag_set(graph, vertex, SET_R_NODE(graph_tag_get(graph, vertex)));
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}
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static inline void graph_vertex_set_tnode(graph_t *graph, int vertex)
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{
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graph_tag_set(graph, vertex, SET_T_NODE(graph_tag_get(graph, vertex)));
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}
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static inline int graph_vertex_is_visited(graph_t *graph, int vertex)
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{
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return IS_VISITED(graph_tag_get(graph, vertex));
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}
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static inline int graph_vertex_is_rnode(graph_t *graph, int vertex)
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{
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return IS_R_NODE(graph_tag_get(graph, vertex));
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}
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static inline int graph_vertex_is_tnode(graph_t *graph, int vertex)
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{
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return IS_T_NODE(graph_tag_get(graph, vertex));
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}
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#endif
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