diff --git a/libmineziper/include/libmineziper_zip.h b/libmineziper/include/libmineziper_zip.h
index 82da20e..1347ef4 100644
--- a/libmineziper/include/libmineziper_zip.h
+++ b/libmineziper/include/libmineziper_zip.h
@@ -66,8 +66,8 @@ typedef struct ISH
     int raw;
     struct
     {
-  unsigned last_block : 1;
-  unsigned block_type : 2;
+      unsigned last_block : 1;
+      unsigned block_type : 2;
     };
   };
 } ISH;
@@ -98,6 +98,9 @@ void get_cdh(zip* out);
 char* get_encoded_block(zip* in, int n);
 void deflate(zip* in);
 
+int get_number_bit_length_code(DHCH* dhch);
+int get_number_dist_code(DHCH* dhch);
+int get_number_litteral_code(DHCH* dhch);
 
 short decode_length_token(bitstream* bs, int token);
 int decode_distance_token(bitstream* bs, int token);
diff --git a/libmineziper/src/libmineziper_zip.c b/libmineziper/src/libmineziper_zip.c
index 2057c0a..ee73e87 100644
--- a/libmineziper/src/libmineziper_zip.c
+++ b/libmineziper/src/libmineziper_zip.c
@@ -143,6 +143,21 @@ char* decode_type1_block_v2(
   }
 }
 
+int get_number_bit_length_code(DHCH* dhch)
+{
+  return (dhch->bit_length_code & 0b1111) + 4;
+}
+
+int get_number_dist_code(DHCH* dhch)
+{
+  return (dhch->dist_codes & 0b11111) + 1;
+}
+
+int get_number_litteral_code(DHCH* dhch)
+{
+  return (dhch->literal_codes & 0b11111) + 257;
+}
+
 short decode_length_token(bitstream* bs, int token)
 {
   token -= END_OF_BLOCK + 1;