56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
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#ifndef INCLUDED_C_DEPTHFIRSTORDER_H
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#define INCLUDED_C_DEPTHFIRSTORDER_H
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#ifndef INCLUDED_C_DIGRAPH_H
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#include <c_Digraph.h>
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#endif /*INCLUDED_C_DIGRAPH_H*/
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#ifndef INCLUDED_C_VERTEXIDLIST_H
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#include <c_VertexIdList.h>
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#endif /*INCLUDED_C_VERTEXIDLIST_H*/
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/* ------------------------------------------------------------------------------------------------------------------ */
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/* */
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typedef struct {
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c_bool_t* marked; /* Visited tracking array (size of graph->V) */
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c_VertexIdList_t pre_order; /* Vertices in pre-order sequence */
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c_VertexIdList_t post_order; /* Vertices in post-order sequence */
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c_VertexIdList_t reverse_post; /* Vertices in reverse post-order sequence */
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c_Allocator_t allocator; /* Deep copy of the user-provided allocator */
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} c_DepthFirstOrder_t;
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/* ------------------------------------------------------------------------------------------------------------------ */
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/* */
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/**
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* @brief Computes pre-order, post-order, and reverse post-order traversals for a digraph.
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* @param allocator Explicit allocator context used to allocate internal arrays and lists
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*/
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c_err_t c_DepthFirstOrder_Init(c_DepthFirstOrder_t* self, c_Digraph_t* graph, c_Allocator_t* allocator);
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/**
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* @brief Releases internal tracking buffers
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*/
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void c_DepthFirstOrder_Destroy(c_DepthFirstOrder_t* self);
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/**
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* @brief Gets a copy of the pre-order vertex list.
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*/
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c_err_t c_DepthFirstOrder_GetPre(c_DepthFirstOrder_t* self, c_VertexIdList_t* out_list);
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/**
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* @brief Gets a copy of the post-order vertex list.
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*/
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c_err_t c_DepthFirstOrder_GetPost(c_DepthFirstOrder_t* self, c_VertexIdList_t* out_list);
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/**
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* @brief Gets a copy of the reverse post-order vertex list (Topological order candidate).
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*/
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c_err_t c_DepthFirstOrder_GetReversePost(c_DepthFirstOrder_t* self, c_VertexIdList_t* out_list);
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#endif /*INCLUDED_C_DEPTHFIRSTORDER_H*/
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