Add vectors

vector.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+
+#include "error.h"
+#include "vector.h"
+
+#define DEFAULT_CAP 16
+
+VECTOR_GEN_SOURCE(Char, char)
+
+Vector *vector_new(size_t size, size_t cap)
+{
+    Vector *v;
+
+    if (cap == 0)
+        cap = DEFAULT_CAP;
+
+    if (!(v = malloc(sizeof(*v)))) {
+        PRINTINTERR(FUNCFAILED("malloc"), ERRNOS);
+        abort();
+    }
+
+    if (!(v->buf = malloc(size * cap))) {
+        PRINTINTERR(FUNCFAILED("malloc"), ERRNOS);
+        abort();
+    }
+
+    v->size = size;
+    v->cap = cap;
+    v->len = 0;
+
+    return v;
+}
+
+void vector_free(Vector *vec)
+{
+    free(vec->buf);
+    free(vec);
+}
+
+void vector_append_arr(Vector *vec, void *arr, size_t len)
+{
+    void *p;
+    size_t cap = vec->cap;
+
+    while (cap < vec->len + len)
+        cap *= 2;
+
+    if (cap != vec->cap) {
+        if (!(p = realloc(vec->buf, vec->size * cap))) {
+            vector_free(vec);
+            PRINTINTERR(FUNCFAILED("realloc"), ERRNOS);
+            abort();
+        }
+
+        vec->buf = p;
+        vec->cap = cap;
+    }
+
+    memcpy(vec->buf + vec->len * vec->size, arr, len * vec->size);
+    vec->len += len;
+}
+
+void vector_append(Vector *vec, void *val)
+{
+    vector_append_arr(vec, val, 1);
+}
+
+void *vector_get(Vector *vec, size_t i)
+{
+    return vec->buf + i * vec->size;
+}