copied from isamc.h, simplifying

diff --git a/include/isamh.h b/include/isamh.h
new file mode 100644 (file)
index 0000000..aca5503
--- /dev/null
+++ b/include/isamh.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 1995-1997, Index Data.
+ * See the file LICENSE for details.
+ *
+ * IsamH is a simple ISAM that can only append to the end of the list.
+ * It will need a clean-up process occasionally...  Code stolen from
+ * isamc...
+ * 
+ * Heikki Levanto
+ *
+ * Detailed log at the end of the file
+ *
+ */
+
+#ifndef ISAMH_H
+#define ISAMH_H
+
+#include <bfile.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ISAMH_s *ISAMH;
+typedef int ISAMH_P;
+typedef struct ISAMH_PP_s *ISAMH_PP;
+
+typedef struct ISAMH_filecat_s {  /* filecategories, mostly block sizes */
+    int bsize;         /* block size */
+    int mblocks;       /* maximum blocks */
+} *ISAMH_filecat;
+
+typedef struct ISAMH_M_s {
+    ISAMH_filecat filecat;
+
+    int (*compare_item)(const void *a, const void *b);
+
+#define ISAMH_DECODE 0
+#define ISAMH_ENCODE 1
+    void *(*code_start)(int mode);
+    void (*code_stop)(int mode, void *p);
+    void (*code_item)(int mode, void *p, char **dst, char **src);
+    void (*code_reset)(void *p);
+
+    int max_blocks_mem;
+    int debug;
+} *ISAMH_M;
+
+typedef struct ISAMH_I_s {  /* encapsulation of input data */
+    int (*read_item)(void *clientData, char **dst, int *insertMode);
+    void *clientData;
+} *ISAMH_I;
+
+ISAMH_M isamh_getmethod (void);
+
+ISAMH isamh_open (BFiles bfs, const char *name, int writeflag, ISAMH_M method);
+int isamh_close (ISAMH is);
+ISAMH_P isamh_append (ISAMH is, ISAMH_P pos, ISAMH_I data);
+  /* corresponds to isc_merge */
+  
+  
+ISAMH_PP isamh_pp_open (ISAMH is, ISAMH_P pos);
+void isamh_pp_close (ISAMH_PP pp);
+int isamh_read_item (ISAMH_PP pp, char **dst);
+int isamh_pp_read (ISAMH_PP pp, void *buf);
+int isamh_pp_num (ISAMH_PP pp);
+
+int isamh_block_used (ISAMH is, int type);
+int isamh_block_size (ISAMH is, int type);
+
+#define isamh_type(x) ((x) & 7)
+#define isamh_block(x) ((x) >> 3)
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* ISAMH_H */
+
+
+/*
+ * $Log: isamh.h,v $
+ * Revision 1.1  1999-06-30 15:06:28  heikki
+ * copied from isamc.h, simplifying
+ *
+ */