Added getmesh function

src/devil1geo.c

@@ -88,3 +88,28 @@ bool getmeshbatch(struct Batch *b,
     done = true;
     return done;
 }
+
+// assume client has allocated memory for mesh
+bool getmesh(struct Mesh *m,
+             unsigned int i,
+             const char * const filedata) {        
+    bool done = false;
+    if (m == NULL || filedata == NULL || m -> b == NULL) {
+        return done;
+    }
+    struct MeshHeader *mh = NULL;
+    bool ok = getmeshheader(&mh, i, filedata);
+    if (ok) {
+        unsigned int j;
+        struct Batch b;
+        for (j = 0; j < mh -> numBatch; j++) {
+            unsigned int offset = mh->offsetBatches + j * sizeof(struct BatchData);
+            getmeshbatch(&b, offset, filedata);
+            printmeshbatch(&b);
+            m -> b[j] = b;
+        }
+        done = true;
+    }
+    return done;
+}
+