From 8d5b381b540fe1d780311e4f4059dce014a6cb91 Mon Sep 17 00:00:00 2001
From: Tucker Evans <tucker@tuckerevans.com>
Date: Fri, 3 Jul 2020 00:13:04 -0400
Subject: Add copy function for vector

---
 collections/vector/vector.adoc | 26 +++++++++++++++++++++++++-
 collections/vector/vector.c    | 20 ++++++++++++++++++++
 collections/vector/vector.h    |  1 +
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/collections/vector/vector.adoc b/collections/vector/vector.adoc
index fbb0b32..4920893 100644
--- a/collections/vector/vector.adoc
+++ b/collections/vector/vector.adoc
@@ -1,7 +1,7 @@
 Vector
 ======
 Tucker Evans
-v0.6, 2020-07-02
+v0.7, 2020-07-03
 
 A basic vector, that hold pointers to your data structures.
 
@@ -212,3 +212,27 @@ Output:
 VEC_CONTENTS:
 	[ONE,TWO,THREE]
 ----
+
+[[vec_cp]]
++vec* vec_cp(vec *self)+
+~~~~~~~~~~~~~~~~~~~~~~~~
+Returns a copy of the vector +self+. All elements are kept in the same order.
+
+Examples
+^^^^^^^^
+[source,c]
+----
+#include "vector.h"
+#include <string.h>
+
+char *str1 = "ONE";
+char *str2 = "TWO";
+
+vec *vector = vec_with_capacity(16);
+vec_push_back(vector, str_dup(str1));
+vec_push_back(vector, str_dup(str2));
+
+vec *new = vec_cp(vector);
+assert(strcmp(vec_pop_back, str2) == 0);
+assert(strcmp(vec_pop_back, str1) == 0);
+----
diff --git a/collections/vector/vector.c b/collections/vector/vector.c
index b3751dd..8aaffb6 100644
--- a/collections/vector/vector.c
+++ b/collections/vector/vector.c
@@ -144,3 +144,23 @@ vec *root;
 	}
 	fprintf(stderr, "\n");
 }
+
+vec* vec_cp(root)
+vec *root;
+{
+	vec *copy;
+
+	if (!root)
+		return NULL;
+
+	copy = vec_with_capacity(root->limit);
+
+	copy->base = memcpy(copy->base, root->base,
+			vec_size(root) * sizeof(void*));
+	assert(copy->base);
+
+	copy->end = root->end;
+	copy->limit = root->limit;
+
+	return copy;
+}
diff --git a/collections/vector/vector.h b/collections/vector/vector.h
index 54e40a7..229b4b0 100644
--- a/collections/vector/vector.h
+++ b/collections/vector/vector.h
@@ -12,4 +12,5 @@ void* vec_pop(vec*);
 void vec_free(vec*);
 void vec_clear(vec*);
 void vec_print(vec*, char* (void*));
+vec* vec_cp(vec*);
 #endif
-- 
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