diff --git a/fp.h b/fp.h
index fb27680..871e40b 100644
--- a/fp.h
+++ b/fp.h
@@ -21,7 +21,7 @@
     - twitter  : https://twitter.com/powturbo
     - email    : powturbo [_AT_] gmail [_DOT_] com
 **/
-//     "Floating Point Compressionw/ TurboPFor"
+//     "Floating Point/Integer Compressionw/ TurboPFor"
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -31,28 +31,34 @@ extern "C" {
 #include <stdint.h>
 #endif
 //---- Last value Predictor 
-unsigned char *fppenc64(   uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
-unsigned char *fppdec64(   unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
+unsigned char *fppenc64(   uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+unsigned char *fppdec64(   unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
 
-unsigned char *fpgenc64(   uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
-unsigned char *fpgdec64(   unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
+unsigned char *fpgenc64(   uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+unsigned char *fpgdec64(   unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
 
-unsigned char *fppdec64(unsigned char *in, unsigned n, uint64_t *out, uint64_t start);
-unsigned char *fpddenc64(uint64_t *in, unsigned n, unsigned char *out, uint64_t start);
+unsigned char *fppdec64(   unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
+unsigned char *fpddenc64(  uint64_t *in,      size_t n, unsigned char *out, uint64_t start);
 
-unsigned char *bitgenc32(uint32_t      *in, unsigned n, unsigned char *out, uint32_t start);
-unsigned char *bitgdec32(unsigned char *in, unsigned n, uint32_t      *out, uint32_t start);
+//---- Delta of delta
+unsigned char *bitgenc32(  uint32_t      *in, size_t n, unsigned char *out, uint32_t start);
+unsigned char *bitgdec32(  unsigned char *in, size_t n, uint32_t      *out, uint32_t start);
 
-unsigned char *bitgenc64(uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
-unsigned char *bitgdec64(unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
+unsigned char *bitgenc64( uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+unsigned char *bitgdec64( unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
+
+//unsigned char *bitg0enc32(  uint32_t      *in, size_t n, unsigned char *out, uint32_t start);
+//unsigned char *bitg0dec32(  unsigned char *in, size_t n, uint32_t      *out, uint32_t start);
+//unsigned char *bitg0enc64(  uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+//unsigned char *bitg0dec64(  unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
 
 //---- FCM: Finite Context Method Predictor 
-unsigned char *fpfcmenc64( uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
-unsigned char *fpfcmdec64( unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
+unsigned char *fpfcmenc64( uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+unsigned char *fpfcmdec64( unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
 
 // DFCM: Differential Finite Context Method Predictor 
-unsigned char *fpdfcmenc64(uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
-unsigned char *fpdfcmdec64(unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
+unsigned char *fpdfcmenc64(uint64_t      *in, size_t n, unsigned char *out, uint64_t start);
+unsigned char *fpdfcmdec64(unsigned char *in, size_t n, uint64_t      *out, uint64_t start);
 #ifdef __cplusplus
 }
 #endif