Added the utility library itself (linked with target astaroth_utils)

src/utils/memory.c

@@ -0,0 +1,64 @@
+/*
+    Copyright (C) 2014-2019, Johannes Pekkilae, Miikka Vaeisalae.
+
+    This file is part of Astaroth.
+
+    Astaroth is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Astaroth is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Astaroth.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "memory.h"
+
+#include <math.h>
+#include <string.h>
+
+#include "src/core/errchk.h"
+
+AcResult
+acMeshCreate(const AcMeshInfo info, AcMesh* mesh)
+{
+    mesh->info = info;
+
+    const size_t bytes = acVertexBufferSizeBytes(mesh->info);
+    for (int w = 0; w < NUM_VTXBUF_HANDLES; ++w) {
+        mesh->vertex_buffer[w] = malloc(bytes);
+        ERRCHK_ALWAYS(mesh->vertex_buffer[w]);
+    }
+
+    return AC_SUCCESS;
+}
+
+AcResult
+acMeshDestroy(AcMesh* mesh)
+{
+    for (int w = 0; w < NUM_VTXBUF_HANDLES; ++w)
+        free(mesh->vertex_buffer[w]);
+
+    return AC_SUCCESS;
+}
+
+AcResult
+acMeshSet(const AcReal value, AcMesh* mesh)
+{
+    const int n = acVertexBufferSize(mesh->info);
+    for (int w = 0; w < NUM_VTXBUF_HANDLES; ++w)
+        for (int i = 0; i < n; ++i)
+            mesh->vertex_buffer[w][i] = value;
+
+    return AC_SUCCESS;
+}
+
+AcResult
+acMeshClear(AcMesh* mesh)
+{
+    return acMeshSet(0, mesh);
+}