diff --git a/include/devil1geo.h b/include/devil1geo.h
index 048b5e1..00375ad 100644
--- a/include/devil1geo.h
+++ b/include/devil1geo.h
@@ -72,20 +72,40 @@ struct Mesh {
 
 #pragma pack(pop)
 
-void printgheader(struct Header*);
+typedef struct { 
+    void (* const printheader)    (struct Header*);
+    void (* const printmeshheader)(struct MeshHeader*);
+    void (* const printbatch)     (struct Batch*);
+    void (* const printcoordinate)(struct Coordinate*, unsigned int);
 
-void printmeshheader(struct MeshHeader*);
+    bool (* const getmeshheader)  (struct MeshHeader**, 
+                                   unsigned int i, 
+                                   const char * const);
 
-void printmeshbatch(struct Batch*);
+    bool (* const getbatch)       (struct Batch*, 
+                                   unsigned int offset, 
+                                   const char * const);
 
-void printcoordinate(struct Coordinate*, unsigned int);
+    bool (* const getmesh)        (struct Mesh*, 
+                                   unsigned int i, 
+                                   const char* filename);
+} fn_devil1geo;
+extern fn_devil1geo const DEVIL1GEO;
+
+static void printgheader(struct Header*);
+
+static void printmeshheader(struct MeshHeader*);
+
+static void printmeshbatch(struct Batch*);
+
+static void printcoordinate(struct Coordinate*, unsigned int);
 
 // ** = 'pass by reference' of a pointer to struct
-bool getmeshheader(struct MeshHeader**, unsigned int i, const char * const);
+static bool getmeshheader(struct MeshHeader**, unsigned int i, const char * const);
 
-bool getmeshbatch(struct Batch*, unsigned int offset, const char * const);
+static bool getmeshbatch(struct Batch*, unsigned int offset, const char * const);
 
-bool getmesh(struct Mesh*, unsigned int i, const char* filename);
+static bool getmesh(struct Mesh*, unsigned int i, const char* filename);
 
 #endif
 
diff --git a/src/devil1geo.c b/src/devil1geo.c
index 401eafe..bf3cfb2 100644
--- a/src/devil1geo.c
+++ b/src/devil1geo.c
@@ -1,7 +1,15 @@
 #include "devil1geo.h"
 #include <stdio.h>
 
-void printgheader(struct Header *gh) {
+fn_devil1geo const DEVIL1GEO = {printgheader,
+                                printmeshheader,
+                                printmeshbatch,
+                                printcoordinate,
+                                getmeshheader,
+                                getmeshbatch,
+                                getmesh};
+
+static void printgheader(struct Header *gh) {
     if (gh != NULL) {
         printf("pointer %x\n", gh);
         printf("number of meshes %x\n", gh -> numMesh);
@@ -13,7 +21,7 @@ void printgheader(struct Header *gh) {
     }
 }
 
-void printmeshheader(struct MeshHeader *mh) {
+static void printmeshheader(struct MeshHeader *mh) {
     if (mh == NULL) {
         return;
     }
@@ -24,7 +32,7 @@ void printmeshheader(struct MeshHeader *mh) {
     printf("flags %x\n\n", mh -> flags);
 }
 
-void printmeshbatch(struct Batch *b) {
+static void printmeshbatch(struct Batch *b) {
     if (b == NULL) {
         return;
     }
@@ -41,7 +49,7 @@ void printmeshbatch(struct Batch *b) {
     printcoordinate(b -> vd.positions, 3);
 }
 
-void printcoordinate(struct Coordinate *p, unsigned int count) {
+static void printcoordinate(struct Coordinate *p, unsigned int count) {
     if (p == NULL) {
         return;
     }
@@ -51,7 +59,7 @@ void printcoordinate(struct Coordinate *p, unsigned int count) {
     }
 }
 
-bool getmeshheader(struct MeshHeader **hs,
+static bool getmeshheader(struct MeshHeader **hs,
                    unsigned int i,
                    const char * const filedata) {
     bool done = false;
@@ -68,7 +76,7 @@ bool getmeshheader(struct MeshHeader **hs,
     return done;
 }
 
-bool getmeshbatch(struct Batch *b, 
+static bool getmeshbatch(struct Batch *b, 
                   unsigned int offset, 
                   const char * const filedata) {
     bool done = false;
@@ -90,7 +98,7 @@ bool getmeshbatch(struct Batch *b,
 }
 
 // assume client has allocated memory for mesh
-bool getmesh(struct Mesh *m,
+static bool getmesh(struct Mesh *m,
              unsigned int i,
              const char * const filedata) {        
     bool done = false;
diff --git a/test/main.c b/test/main.c
index ddef757..ab0cb5d 100644
--- a/test/main.c
+++ b/test/main.c
@@ -129,10 +129,10 @@ void extractmeshes(const char *filedata,
     m.b = NULL;
     unsigned int i;
     for (i = 0; i < h -> numMesh; i++) {
-        getmeshheader(&mh, i, filedata);
+        DEVIL1GEO.getmeshheader(&mh, i, filedata);
         m.b = (struct Batch*)malloc(sizeof(struct Batch) * (mh -> numBatch));
         if (m.b != NULL) {
-            getmesh(&m, i, filedata);
+            DEVIL1GEO.getmesh(&m, i, filedata);
             // do something with mesh e.g write to file.
             free(m.b);
         }
@@ -144,8 +144,8 @@ int main(int argc, char ** argv) {
     unsigned int bufsize = 0;
     char *buffer         = loadfile(f, &bufsize);
 //    unpackpld(buffer, bufsize, f);
-    exporttextures(buffer, bufsize, f);
-//    extractmeshes(buffer, bufsize, f);
+//    exporttextures(buffer, bufsize, f);
+    extractmeshes(buffer, bufsize, f);
     free(buffer);
     return 0;
 }