Graph

2026-09-07 18:48:16 +08:00
parent 1564716731
commit c945aa211f
138 changed files with 10337 additions and 150 deletions
@@ -0,0 +1,43 @@
+#ifndef INCLUDED_C_NONRECURSIVEDIRECTEDDFS_H
+#define INCLUDED_C_NONRECURSIVEDIRECTEDDFS_H
+
+#ifndef INCLUDED_C_DIGRAPH_H
+#include <c_Digraph.h>
+#endif /*INCLUDED_C_DIGRAPH_H*/
+
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct {
+    c_bool_t*      marked;      /* Visited tracking array (size of graph->V) */
+    c_size_t       count;       /* Total number of vertices reachable from source(s) */
+    c_Allocator_t  allocator;   /* Copied allocator from the graph for isolation */
+} c_NonrecursiveDirectedDFS_t;
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+/**
+ * @brief Computes vertices reachable from a single source vertex 's' using a stack
+ */
+c_err_t c_NonrecursiveDirectedDFS_Init(c_NonrecursiveDirectedDFS_t* self, c_Digraph_t* graph, c_size_t s, c_Allocator_t* allocator);
+
+/**
+ * @brief Releases internal tracking buffers
+ */
+void c_NonrecursiveDirectedDFS_Destroy(c_NonrecursiveDirectedDFS_t* self);
+
+/* ================================================================================================================== */
+/* Inline Query Interfaces */
+
+C_STATIC_FORCE_INLINE c_bool_t c_NonrecursiveDirectedDFS_HasPathTo(c_NonrecursiveDirectedDFS_t* self, c_size_t v, c_size_t total_V) {
+    if (!self || !self->marked || v >= total_V) return C_FALSE;
+    return self->marked[v];
+}
+
+C_STATIC_FORCE_INLINE c_size_t c_NonrecursiveDirectedDFS_GetCount(c_NonrecursiveDirectedDFS_t* self) {
+    return self ? self->count : 0;
+}
+
+#endif /*INCLUDED_C_NONRECURSIVEDIRECTEDDFS_H*/