+YAZ_EXPORT
+int isamc_pp_read(ISAMC_PP pp, void *buf);
+
+YAZ_EXPORT
+zint isamc_pp_num(ISAMC_PP pp);
+
+YAZ_EXPORT
+zint isamc_block_used(ISAMC is, int type);
+
+YAZ_EXPORT
+int isamc_block_size(ISAMC is, int type);
+
+#define isamc_type(x) ((x) & 7)
+#define isamc_block(x) ((x) >> 3)