一些基础组件

2026-08-30 04:01:21 +08:00
parent cac925fbbb
commit 636657f454
3 changed files with 218 additions and 0 deletions
@@ -0,0 +1 @@
+#include <c_List.h>
@@ -0,0 +1,73 @@
+#ifndef INCLUDED_C_LIST_H
+#define INCLUDED_C_LIST_H
+
+#ifndef INCLUDED_C_TYPES_H
+#include <c_Types.h>
+#endif /*INCLUDED_C_TYPES_H*/
+
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+typedef struct c_ListNode_t {
+    struct c_ListNode_t* prev;
+    struct c_ListNode_t* next;
+}c_ListNode_t;
+
+typedef c_ListNode_t c_List_t;
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+#define c_List_Prev(n) (n)->prev
+#define c_List_Next(n) (n)->next
+#define c_List_PrevNext(n) c_List_Next(c_List_Prev(n))
+#define c_List_NextPrev(n) c_List_Prev(c_List_Next(n))
+
+/* ------------------------------------------------------------------------------------------------------------------ */
+/*  */
+
+
+#define c_List_Init(n) do{                      \
+    c_List_Prev(n) = c_List_Next(n) = (n);      \
+}while(0)
+
+#define c_List_IsEmpty(n) ((c_List_Next(n) == (n)) && (c_List_Prev(n) == (n)))
+
+#define c_List_InsertBefore(L, N) do {           \
+    c_List_Next(N) = (L);                        \
+    c_List_Prev(N) = c_List_Prev(L);             \
+    c_List_PrevNext(N) = (N);                    \
+    c_List_Prev(L) = (N);                        \
+} while(0)
+
+#define c_List_InsertAfter(L, N) do {            \
+    c_List_Prev(N) = (L);                        \
+    c_List_Next(N) = c_List_Next(L);             \
+    c_List_NextPrev(N) = (N);                    \
+    c_List_Next(L) = (N);                        \
+} while(0)
+
+#define c_List_Remove(n) do {                    \
+    c_List_PrevNext(n) = c_List_Next(n);         \
+    c_List_NextPrev(n) = c_List_Prev(n);         \
+    c_List_Init(n);                              \
+} while(0)
+
+#define c_List_Entry(ptr, type, member) \
+    ((type *)((char *)(ptr) - offsetof(type, member)))
+
+// Standard forward loop: Safe for lookups, UNSAFE for deletions
+#define c_List_ForEachEntry(head, pos, type, member)                         \
+    for (pos = c_List_Entry(c_List_Next(head), type, member);                \
+         &pos->member != (head);                                             \
+         pos = c_List_Entry(c_List_Next(&pos->member), type, member))
+
+// Safe forward loop: Explicitly safe to call c_List_Remove inside the loop body
+#define c_List_ForEachEntrySafe(head, pos, n, type, member)                  \
+    for (pos = c_List_Entry(c_List_Next(head), type, member),                \
+         n = c_List_Entry(c_List_Next(&pos->member), type, member);          \
+         &pos->member != (head);                                             \
+         pos = n, n = c_List_Entry(c_List_Next(&n->member), type, member))
+
+#endif /*INCLUDED_C_LIST_H*/
@@ -0,0 +1,144 @@
+#include <assert.h>
+
+#include "c_List.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+// Custom User Type showcasing intrusive inclusion
+typedef struct {
+    int value;
+    c_ListNode_t node; // Intrusive node payload linkage
+} CustomData_t;
+
+static void test2(void) {
+    printf("==================================================\n");
+    printf(" Starting Intrusive Safe-Iterator Unit Tests\n");
+    printf("==================================================\n\n");
+
+    c_List_t head;
+    c_List_Init(&head);
+
+    CustomData_t d1 = {10};
+    CustomData_t d2 = {20};
+    CustomData_t d3 = {30};
+
+    // Linking nodes to tail: [Head] <-> [10] <-> [20] <-> [30]
+    c_List_InsertBefore(&head, &d1.node);
+    c_List_InsertBefore(&head, &d2.node);
+    c_List_InsertBefore(&head, &d3.node);
+
+    // ==========================================
+    // 1. Verify Lookups via ForEachEntry
+    // ==========================================
+    CustomData_t* pos;
+    int index = 0;
+    int expected[] = {10, 20, 30};
+
+    printf("Reading nodes using standard ForEachEntry:\n");
+    c_List_ForEachEntry(&head, pos, CustomData_t, node) {
+        printf("  Found Entry value: %d\n", pos->value);
+        assert(pos->value == expected[index++]);
+    }
+    assert(index == 3);
+    printf("[PASS] Standard lookup loop complete.\n\n");
+
+    // ==========================================
+    // 2. Verify Mutations via ForEachEntrySafe
+    // ==========================================
+    CustomData_t* tmp; // Cache variable for safe traversal tracking
+    index = 0;
+
+    printf("Filtering and removing matching entry elements via Safe Loop:\n");
+    c_List_ForEachEntrySafe(&head, pos, tmp, CustomData_t, node) {
+        if (pos->value == 20) {
+            printf("  Modifying layout: Safely dropping element (%d)\n", pos->value);
+            c_List_Remove(&pos->node); // Remove middle item mid-flight
+        }
+        index++;
+    }
+    assert(index == 3); // Iterated through all three bounds
+
+    // ==========================================
+    // 3. Confirm Final Structure Integrity
+    // ==========================================
+    // List must now structurally bridge to bypass item 20: [10] <-> [30]
+    index = 0;
+    c_List_ForEachEntry(&head, pos, CustomData_t, node) {
+        if (index == 0) assert(pos->value == 10);
+        if (index == 1) assert(pos->value == 30);
+        index++;
+    }
+    assert(index == 2);
+    printf("[PASS] Structural integrity verified following safe removal mutation.\n");
+
+    printf("\n==================================================\n");
+    printf(" Success! Intrusive layout traversal operates flawlessly!\n");
+    printf("==================================================\n");
+}
+
+int main() {
+    printf("==================================================\n");
+    printf(" Starting Intrusive Circular Doubly Linked List Tests\n");
+    printf("==================================================\n\n");
+
+    // Initialize list head context anchor
+    c_List_t head;
+    c_List_Init(&head);
+    assert(c_List_IsEmpty(&head) == 1);
+
+    CustomData_t d1 = {100};
+    CustomData_t d2 = {200};
+    CustomData_t d3 = {300};
+
+    // ==========================================
+    // 1. Insertion Testing
+    // ==========================================
+    // Insert d1 after head -> List: [Head] <-> [100]
+    c_List_InsertAfter(&head, &d1.node);
+    assert(c_List_IsEmpty(&head) == 0);
+
+    // Insert d3 before head -> List: [Head] <-> [100] <-> [300]
+    c_List_InsertBefore(&head, &d3.node);
+
+    // Insert d2 after d1 -> List: [Head] <-> [100] <-> [200] <-> [300]
+    c_List_InsertAfter(&d1.node, &d2.node);
+
+    printf("[PASS] Sequence insertions complete.\n");
+
+    // ==========================================
+    // 2. Linear Traversal Verification
+    // ==========================================
+    c_ListNode_t* curr = c_List_Next(&head);
+    int expected_values[] = {100, 200, 300};
+    int idx = 0;
+
+    while (curr != &head) {
+        CustomData_t* entry = c_List_Entry(curr, CustomData_t, node);
+        assert(entry->value == expected_values[idx]);
+        curr = c_List_Next(curr);
+        idx++;
+    }
+    assert(idx == 3);
+    printf("[PASS] Intrusive forward iterator matching sequential expectations.\n");
+
+    // ==========================================
+    // 3. Deletion and Mutation Verification
+    // ==========================================
+    // Target and drop middle node (200)
+    c_List_Remove(&d2.node);
+
+    // Structure must bridge gaps smoothly: [100] <-> [300]
+    assert(c_List_Next(&d1.node) == &d3.node);
+    assert(c_List_Prev(&d3.node) == &d1.node);
+
+    // Eliminated isolated node must be self-referencing via macro assignment
+    assert(c_List_IsEmpty(&d2.node) == 1);
+    printf("[PASS] Drop operation and isolated reference initialization verified.\n");
+
+    printf("\n==================================================\n");
+    printf(" Success! Intrusive macro mutations match layout specs!\n");
+    printf("==================================================\n");
+
+    test2();
+    return 0;
+}