/*
* Sherlock: Data structures used in indices
*
- * (c) 2001--2002 Martin Mares <mj@ucw.cz>
+ * (c) 2001--2003 Martin Mares <mj@ucw.cz>
*/
#ifndef _SHERLOCK_INDEX_H
#include SHERLOCK_CUSTOM
#include "charset/unistream.h"
-/* Words */
+/*
+ * Words and word complexes
+ *
+ * MAX_WORD_LEN is the maximum length (measured in UTF-8 characters, excluding
+ * the terminating zero byte if there's any) of any word which may appear in the
+ * indices or in the bucket file. Naturally, the same constant also bounds
+ * the number of UCS-2 characters in a word.
+ *
+ * Caveat: If you are upcasing/downcasing the word, the UTF-8 encoding can
+ * expand, although at most twice, so you need to reserve 2*MAX_WORD_LEN bytes.
+ *
+ * MAX_COMPLEX_LEN is the upper bound on number of words in any word complex.
+ */
-#define MAX_WORD_LEN 64
+#define MAX_WORD_LEN 64 /* a multiple of 4 */
#define MAX_COMPLEX_LEN 10
/* Word and string types are defined in lib/custom.h */
CUSTOM_CARD_ATTRS /* Include all custom attributes */
byte weight;
byte flags;
+#ifdef CONFIG_LASTMOD
byte age; /* Document age in pseudo-logarithmic units wrt. reference time */
- // byte rfu[1]; /* If no custom attributes are defined */
+#endif
+#ifdef CONFIG_FILETYPE
+ byte type_flags; /* File type flags (see below) */
+#endif
};
enum card_flag {
CARD_FLAG_DUP = 4, /* Removed as a duplicate [merger] */
CARD_FLAG_MERGED = 8, /* Destination of a merge [merger] */
CARD_FLAG_IMAGE = 16, /* Is an image object [scanner] */
+ CARD_FLAG_FRAMESET = 32, /* Contains a frameset [scanner] */
};
-#define CARD_POS_SHIFT 5 /* Card positions are shifted this # of bytes to the right */
+#define CARD_POS_SHIFT 5 /* Card positions are shifted this # of bits to the right */
+
+/*
+ * We store document type and several other properties in card_attr->type_flags.
+ * Here we define only the basic structure, the details and also how to match the
+ * types are defined in custom.h.
+ *
+ * bits 7--5 file type: (0-3: text types, 4-7: other types, defined by custom.h)
+ * bits 4--0 type-dependent information, for text types it's document language code
+ */
+
+#define CA_GET_FILE_TYPE(a) ((a)->type_flags >> 5)
+#define CA_GET_FILE_INFO(a) ((a)->type_flags & 0x1f)
+#define CA_GET_FILE_LANG(a) ((a)->type_flags & 0x80 ? 0 : CA_GET_FILE_INFO(a))
/* String fingerprints */