erase() should really now set proper values to 0 after move

tests/quick_test.c

@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define CAPACITY 1024
+#define nullptr ((void*)0)
+
+typedef struct {
+    char* arr;
+    size_t size;
+    size_t capacity;
+} Vec8_t;
+
+Vec8_t create(const Vec8_t* input) {
+    Vec8_t vec = { .arr = nullptr, .size = 0, .capacity = CAPACITY };
+    if (input != nullptr && input->size > 0) vec.size = input->size + 1;
+    vec.arr = calloc(vec.capacity, sizeof(char));
+    return vec;
+}
+
+Vec8_t add_back(Vec8_t* vec, const char val) {
+    if (vec->size >= vec->capacity) {
+        vec->capacity *= 2;
+        char* nvec = reallocf(vec->arr, vec->capacity * sizeof(char));
+        if (nvec == NULL) return *vec;
+        vec->arr = nvec;
+    }
+    vec->arr[vec->size] = val;
+    vec->size++;
+    return *vec;
+}
+
+// Your current implementation
+__attribute__((overloadable)) Vec8_t*
+erase(Vec8_t* vec, const int iter_start, const int iter_end) {
+        if(vec == nullptr) return nullptr;
+        if(vec->arr == nullptr) return nullptr;
+        if(iter_start < 0 || iter_end >= vec->size) return nullptr;
+        if(iter_start >= iter_end) return nullptr;
+        size_t diff = iter_end - iter_start;
+        memmove(&vec->arr[iter_start], &vec->arr[iter_end], (vec->size - iter_end) * sizeof(char));
+        for(size_t i = vec->size - 1; i > iter_end; i--) {
+                vec->arr[i] = 0;
+        }
+        vec->size -= diff;
+        return vec;
+}
+
+int main() {
+    Vec8_t vec = create(nullptr);
+    for (int i = 0; i < 10; i++) add_back(&vec, 'a' + i);
+    
+    printf("Before erase: ");
+    for (int i = 0; i < 10; i++) printf("%c ", vec.arr[i]);
+    printf("(size=%zu)\n", vec.size);
+    
+    erase(&vec, 2, 4);
+    
+    printf("After erase(2,4): ");
+    for (int i = 0; i < 10; i++) printf("%c ", vec.arr[i] == 0 ? '0' : vec.arr[i]);
+    printf("(size=%zu)\n", vec.size);
+    
+    printf("\nExpected: a b e f g h i j (size=8)\n");
+    printf("Got:      ");
+    for (int i = 0; i < vec.size; i++) printf("%c ", vec.arr[i] == 0 ? '0' : vec.arr[i]);
+    printf("(size=%zu)\n", vec.size);
+    
+    return 0;
+}