Forgot to commit this one during the "search by age" changes.

[libucw.git] / lib / index.h

diff --git a/lib/index.h b/lib/index.h
index 0fe46f6bb6a9f45e4a676e0198e58a9894d11722..0585141245e440dd4b03e0dc75068956ee00abea 100644 (file)
--- a/lib/index.h
+++ b/lib/index.h
@@ -1,83 +1,33 @@
 /*
- *     Sherlock Gatherer: Data structures used in indices
+ *     Sherlock: Data structures used in indices
  *
- *     (c) 2001 Martin Mares <mj@ucw.cz>
+ *     (c) 2001--2002 Martin Mares <mj@ucw.cz>
  */
 
 /* Words */
 
 #define MAX_WORD_LEN           64
 
-/* Word types */
-
-enum word_type {
-  WT_RESERVED,                         /* Reserved word type */
-  WT_TEXT,                             /* Ordinary text */
-  WT_EMPH,                             /* Emphasized text */
-  WT_SMALL,                            /* Small font */
-  WT_TITLE,                            /* Document title */
-  WT_SMALL_HEADING,                    /* Heading */
-  WT_BIG_HEADING,                      /* Larger heading */
-  WT_KEYWORD,                          /* Explicitly marked keyword */
-  WT_META,                             /* Various meta-information */
-  WT_ALT,                              /* Alternate texts for graphical elements */
-  WT_MAX
-};
-
-/* Descriptive names used for user output */
-#define WORD_TYPE_USER_NAMES                                                   \
-   "reserved", "text", "emph", "small", "title", "hdr1", "hdr2", "keywd",      \
-   "meta", "alt", "type10", "type11", "type12", "type13", "type14", "type15"
-
-/* Keywords for word type names */
-#define WORD_TYPE_NAMES                                \
-       T(WORD, ~0)                             \
-       T(TEXT, 1 << WT_TEXT)                   \
-       T(EMPH, 1 << WT_EMPH)                   \
-       T(SMALL, 1 << WT_SMALL)                 \
-       T(TITLE, 1 << WT_TITLE)                 \
-       T(HDR, (1 << WT_SMALL_HEADING) | (1 << WT_BIG_HEADING))  \
-       T(HDR1, 1 << WT_SMALL_HEADING)          \
-       T(HDR2, 1 << WT_BIG_HEADING)            \
-       T(KEYWD, 1 << WT_KEYWORD)               \
-       T(META, 1 << WT_META)                   \
-       T(ALT, 1 << WT_ALT)
-
-/* String types */
-
-enum string_type {
-  ST_RESERVED,                         /* Reserved string type */
-  ST_URL,                              /* URL of the document */
-  ST_HOST,                             /* Host name */
-  ST_DOMAIN,                           /* Domain name */
-  ST_REF,                              /* URL reference */
-  ST_BACKREF,                          /* Back-reference (frame or redirect source) */
-  ST_MAX
-};
+/* Word and string types are defined in lib/custom.h */
 
-#define STRING_TYPE_USER_NAMES                                                 \
-   "URL", "host", "domain", "ref", "backref", "type5", "type6", "type7",       \
-   "type8", "type9", "type10", "type11", "type12", "type13", "type14", "type15"
+/* Global index parameters */
 
-#define STRING_TYPE_NAMES                      \
-       T(URL, 1 << ST_URL)                     \
-       T(HOST, 1 << ST_HOST)                   \
-       T(DOMAIN, 1 << ST_DOMAIN)               \
-       T(REF, 1 << ST_REF)                     \
-       T(BACKREF, 1 << ST_BACKREF)
-
-#define STRING_TYPES_URL ((1 << ST_URL) | (1 << ST_REF) | (1 << ST_BACKREF))
-/* These must be indexed in lowercase form */
-#define STRING_TYPES_CASE_INSENSITIVE ((1 << ST_HOST) | (1 << ST_DOMAIN))
+struct index_params {
+  sh_time_t ref_time;                  /* Reference time (for document ages etc.) */
+};
 
 /* Index card attributes */
 
 struct card_attr {
   u32 card;                            /* Reference to card description (either oid or filepos) */
   u32 site_id;
+#define INT_ATTR(t,i,o,k,g,p) t i;
+  CUSTOM_ATTRS                         /* Include all custom attributes */
+#undef INT_ATTR
   byte weight;
   byte flags;
-  byte rfu[2];
+  byte age;                            /* Document age in pseudo-logarithmic units wrt. reference time */
+  // byte rfu[1];                      /* If no custom attributes are defined */
 };
 
 enum card_flag {
@@ -108,7 +58,7 @@ fp_hash(struct fingerprint *fp)
 #define GET_TAGGED_CHAR(p,u) do {                              \
   u = *p;                                                      \
   if (u >= 0xc0)                                               \
-    GET_UTF8(p,u);                                             \
+    GET_UTF8_CHAR(p,u);                                                \
   else if (u >= 0x80)                                          \
     {                                                          \
       p++;                                                     \
@@ -129,3 +79,26 @@ fp_hash(struct fingerprint *fp)
   else                                                         \
     p++;                                                       \
 } while (0)
+
+/* Conversion of document age from seconds to our internal units */
+
+static inline int
+convert_age(sh_time_t lastmod, sh_time_t reftime)
+{
+  sh_time_t age;
+  if (reftime < lastmod)               /* past times */
+    return -1;
+  age = (reftime - lastmod) / 3600;
+  if (age < 48)                                /* last 2 days: 1 hour resolution */
+    return age;
+  age = (age-48) / 24;
+  if (age < 64)                                /* next 64 days: 1 day resolution */
+    return 48 + age;
+  age = (age-64) / 7;
+  if (age < 135)                       /* next 135 weeks: 1 week resolution */
+    return 112 + age;
+  age = (age-135) / 52;
+  if (age < 8)                         /* next 8 years: 1 year resolution */
+    return 247 + age;
+  return 255;                          /* then just "infinite future" */
+}