X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=include%2Frset.h;h=cf368705cb734c6555b393752d51438eae799494;hb=33b386a95c0aac273527d596ce1aafa0dc567b7b;hp=789ae9dfc2310f2167637a2a49cdaa93688f360b;hpb=a57bdec6c84c3dcd2b657f2e2fd14b67be1b5881;p=idzebra-moved-to-github.git

diff --git a/include/rset.h b/include/rset.h
index 789ae9d..cf36870 100644
--- a/include/rset.h
+++ b/include/rset.h
@@ -1,10 +1,64 @@
 /*
- * Copyright (C) 1994, Index Data I/S 
+ * Copyright (C) 1994-1998, Index Data I/S 
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: rset.h,v $
- * Revision 1.1  1994-11-03 14:13:22  quinn
+ * Revision 1.15  1998-03-05 08:37:44  adam
+ * New result set model.
+ *
+ * Revision 1.14  1998/02/10 11:56:46  adam
+ * Implemented rset_dup.
+ *
+ * Revision 1.13  1997/12/18 10:54:24  adam
+ * New method result set method rs_hits that returns the number of
+ * hits in result-set (if known). The ranked result set returns real
+ * number of hits but only when not combined with other operands.
+ *
+ * Revision 1.12  1997/09/05 15:30:03  adam
+ * Changed prototype for chr_map_input - added const.
+ * Added support for C++, headers uses extern "C" for public definitions.
+ *
+ * Revision 1.11  1995/12/11 09:07:53  adam
+ * New rset member 'flag', that holds various flags about a result set -
+ * currently 'volatile' (set is register dependent) and 'ranked' (set is
+ * ranked).
+ * New set types sand/sor/snot. They handle and/or/not for ranked and
+ * semi-ranked result sets.
+ *
+ * Revision 1.10  1995/10/12  12:40:36  adam
+ * Private info (buf) moved from struct rset_control to struct rset.
+ * Member control in rset is statically set in rset_create.
+ *
+ * Revision 1.9  1995/10/10  14:00:01  adam
+ * Function rset_open changed its wflag parameter to general flags.
+ *
+ * Revision 1.8  1995/10/06  14:37:53  adam
+ * New result set method: r_score.
+ * Local no (sysno) and score is transferred to retrieveCtrl.
+ *
+ * Revision 1.7  1995/09/07  13:58:08  adam
+ * New parameter: result-set file descriptor (RSFD) to support multiple
+ * positions within the same result-set.
+ * Boolean operators: and, or, not implemented.
+ *
+ * Revision 1.6  1995/09/06  16:10:58  adam
+ * More work on boolean sets.
+ *
+ * Revision 1.5  1995/09/04  15:20:13  adam
+ * More work on temp sets. is_open member removed.
+ *
+ * Revision 1.4  1995/09/04  09:09:52  adam
+ * String arg in dict lookup is const.
+ * Minor changes.
+ *
+ * Revision 1.3  1994/11/22  13:15:27  quinn
+ * Simple
+ *
+ * Revision 1.2  1994/11/04  13:21:21  quinn
+ * Working.
+ *
+ * Revision 1.1  1994/11/03  14:13:22  quinn
  * Result set manipulation
  *
  */
@@ -12,30 +66,86 @@
 #ifndef RSET_H
 #define RSET_H
 
-typedef struct rset_control
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef void *RSFD;
+
+typedef struct rset *RSET;
+typedef struct rset_term *RSET_TERM;
+
+struct rset_control
 {
-    char *buf;  /* state data stored by subsystem */
-    int (*f_open)(rset_control *ct, int wflag);
-    void (*f_close)(rset_control *ct *data);
-    void (*f_delete)(rset_control *ct);
-    void (*f_rewind)(rset_control *ct);
-    int (*f_count)(rset_control *ct);
-    int (*f_read)(...);
-    int (*f_write)(...);
-} rset_control;
+    char *desc; /* text description of set type (for debugging) */
+    void *(*f_create)(RSET ct, const struct rset_control *sel, void *parms);
+    RSFD (*f_open)(RSET ct, int wflag);
+    void (*f_close)(RSFD rfd);
+    void (*f_delete)(RSET ct);
+    void (*f_rewind)(RSFD rfd);
+    int (*f_count)(RSET ct);
+    int (*f_read)(RSFD rfd, void *buf, int *term_index);
+    int (*f_write)(RSFD rfd, const void *buf);
+};
+
+struct rset_term {
+    char *name;
+    int  nn;
+    char *flags;
+};
 
 typedef struct rset
 {
-    rset_control *control;
-} rset *RSET;
+    const struct rset_control *control;
+    int  flags;
+    int  count;
+    void *buf;
+    RSET_TERM *rset_terms;
+    int no_rset_terms;
+} rset;
+
+RSET_TERM rset_term_create (const char *name, int length, const char *flags);
+void rset_term_destroy (RSET_TERM t);
+RSET_TERM rset_term_dup (RSET_TERM t);
+
+#define RSETF_READ       0
+#define RSETF_WRITE      1
+
+RSET rset_create(const struct rset_control *sel, void *parms); 
+/* parameters? */
+
+/* int rset_open(RSET rs, int wflag); */
+#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag))
+
+/* void rset_close(RSET rs); */
+#define rset_close(rs, rfd) (*(rs)->control->f_close)(rfd)
 
-RSET rset_create();       /* parameters? */
-int rset_open(RSET rs, int wflag);
-void rset_close(RSET rs);
 void rset_delete(RSET rs);
-void rset_rewind(RSET rs);
-int rset_count(RSET rs);   /* more parameters? */
-int rset_read(RSET rs, void *buf);   /* change parameters */
-int rset_write(RSET rs, void *buf);  /* change parameters */
+
+RSET rset_dup (RSET rs);
+
+/* void rset_rewind(RSET rs); */
+#define rset_rewind(rs, rfd) (*(rs)->control->f_rewind)((rfd))
+
+/* int rset_count(RSET rs); */
+#define rset_count(rs) (*(rs)->control->f_count)(rs)
+
+/* int rset_read(RSET rs, void *buf); */
+#define rset_read(rs, fd, buf, indx) (*(rs)->control->f_read)((fd), (buf), indx)
+
+/* int rset_write(RSET rs, const void *buf); */
+#define rset_write(rs, fd, buf) (*(rs)->control->f_write)((fd), (buf))
+
+/* int rset_type (RSET) */
+#define rset_type(rs) ((rs)->control->desc)
+
+#define RSET_FLAG_VOLATILE 1
+
+#define rset_is_volatile(rs) ((rs)->flags & RSET_FLAG_VOLATILE)
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif