-zint isc_alloc_block (ISAMC is, int cat);
-void isc_release_block (ISAMC is, int cat, zint pos);
-int isc_read_block (ISAMC is, int cat, zint pos, char *dst);
-int isc_write_block (ISAMC is, int cat, zint pos, char *src);
+zint isamc_alloc_block (ISAMC is, int cat);
+void isamc_release_block (ISAMC is, int cat, zint pos);
+int isamc_read_block (ISAMC is, int cat, zint pos, char *dst);
+int isamc_write_block (ISAMC is, int cat, zint pos, char *src);