X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=index%2Fextract.c;h=3560d13d79eab8821c1f582f94064f9043b42dbe;hb=3003d747565b03bac252b43eca48bb691d1adbfc;hp=a763b7bd9bf57a66430abd5915703ab3b8d609ed;hpb=fb99bfcb44d29215f411d82646c59f2f74f5a25c;p=idzebra-moved-to-github.git

diff --git a/index/extract.c b/index/extract.c
index a763b7b..3560d13 100644
--- a/index/extract.c
+++ b/index/extract.c
@@ -1,10 +1,36 @@
 /*
- * Copyright (C) 1995, Index Data I/S 
+ * Copyright (C) 1994-1995, Index Data I/S 
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: extract.c,v $
- * Revision 1.4  1995-09-05 15:28:39  adam
+ * Revision 1.12  1995-09-28 14:22:56  adam
+ * Sort uses smaller temporary files.
+ *
+ * Revision 1.11  1995/09/28  12:10:31  adam
+ * Bug fixes. Field prefix used in queries.
+ *
+ * Revision 1.10  1995/09/28  09:19:41  adam
+ * xfree/xmalloc used everywhere.
+ * Extract/retrieve method seems to work for text records.
+ *
+ * Revision 1.9  1995/09/27  12:22:28  adam
+ * More work on extract in record control.
+ * Field name is not in isam keys but in prefix in dictionary words.
+ *
+ * Revision 1.8  1995/09/14  07:48:22  adam
+ * Record control management.
+ *
+ * Revision 1.7  1995/09/11  13:09:32  adam
+ * More work on relevance feedback.
+ *
+ * Revision 1.6  1995/09/08  14:52:27  adam
+ * Minor changes. Dictionary is lower case now.
+ *
+ * Revision 1.5  1995/09/06  16:11:16  adam
+ * Option: only one word key per file.
+ *
+ * Revision 1.4  1995/09/05  15:28:39  adam
  * More work on search engine.
  *
  * Revision 1.3  1995/09/04  12:33:41  adam
@@ -26,35 +52,50 @@
 #include <ctype.h>
 
 #include <alexutil.h>
+#include <recctrl.h>
 #include "index.h"
 
-#define KEY_BUF_SIZE 100000
-
 static Dict file_idx;
 static SYSNO sysno_next;
-static int key_fd = -1;
 static int sys_idx_fd = -1;
-static char *key_buf;
-static int key_offset;
 
-void key_open (const char *fname)
+static int key_cmd;
+static int key_sysno;
+static char **key_buf;
+static size_t ptr_top;
+static size_t ptr_i;
+static size_t kused;
+static int key_file_no;
+
+static int sort_compare (const void *p1, const void *p2)
+{
+    int r;
+    size_t l;
+    char *cp1 = *(char**) p1;
+    char *cp2 = *(char**) p2;
+
+    if ((r = strcmp (cp1, cp2)))
+        return r;
+    l = strlen(cp1); 
+    if ((r = key_compare (cp1+l, cp2+l)))
+        return r;
+    return cp1[l+sizeof(struct it_key)] -
+           cp2[l+sizeof(struct it_key)];
+}
+
+void key_open (int mem)
 {
     void *file_key;
-    if (key_fd != -1)
-        return;
-    if ((key_fd = open (fname, O_RDWR|O_CREAT, 0666)) == -1)
-    {
-        logf (LOG_FATAL|LOG_ERRNO, "open %s", fname);
-        exit (1);
-    }
-    logf (LOG_DEBUG, "key_open of %s", fname);
-    if (!(key_buf = malloc (KEY_BUF_SIZE)))
-    {
-        logf (LOG_FATAL|LOG_ERRNO, "malloc");
-        exit (1);
-    }
-    key_offset = 0;
-    if (!(file_idx = dict_open (FNAME_FILE_DICT, 10, 1)))
+
+    if (mem < 50000)
+        mem = 50000;
+    key_buf = xmalloc (mem);
+    ptr_top = mem/sizeof(char*);
+    ptr_i = 0;
+    kused = 0;
+    key_file_no = 0;
+
+    if (!(file_idx = dict_open (FNAME_FILE_DICT, 40, 1)))
     {
         logf (LOG_FATAL, "dict_open fail of %s", "fileidx");
         exit (1);
@@ -70,95 +111,112 @@ void key_open (const char *fname)
         exit (1);
     }
 }
-
-int key_close (void)
-{
-    if (key_fd == -1)
-    {
-        logf (LOG_DEBUG, "key_close - but no file");
-        return 0;
-    }
-    close (key_fd);
-    close (sys_idx_fd);
-    dict_insert (file_idx, ".", sizeof(sysno_next), &sysno_next);
-    dict_close (file_idx);
-    key_fd = -1;
-    logf (LOG_DEBUG, "key close - key file exist");
-    return 1;
-}
-
+    
 void key_flush (void)
 {
-    size_t i = 0;
-    int w;
+    FILE *outf;
+    char out_fname[200];
+    char *prevcp, *cp;
+    
+    if (ptr_i <= 0)
+        return;
 
-    if (key_fd == -1)
-	return; 
-    while (i < key_offset)
+    key_file_no++;
+    logf (LOG_LOG, "sorting section %d", key_file_no);
+    qsort (key_buf + ptr_top-ptr_i, ptr_i, sizeof(char*), sort_compare);
+    sprintf (out_fname, TEMP_FNAME, key_file_no);
+
+
+    if (!(outf = fopen (out_fname, "w")))
+    {
+        logf (LOG_FATAL|LOG_ERRNO, "fopen (4) %s", out_fname);
+        exit (1);
+    }
+    logf (LOG_LOG, "writing section %d", key_file_no);
+    prevcp = cp = key_buf[ptr_top-ptr_i];
+    
+    if (fwrite (cp, strlen (cp)+2+sizeof(struct it_key), 1, outf) != 1)
+    {
+        logf (LOG_FATAL|LOG_ERRNO, "fwrite %s", out_fname);
+        exit (1);
+    }
+    while (--ptr_i > 0)
     {
-        w = write (key_fd, key_buf + i, key_offset - i);
-        if (w == -1)
+        cp = key_buf[ptr_top-ptr_i];
+        if (strcmp (cp, prevcp))
+        {
+            if (fwrite (cp, strlen (cp)+2+sizeof(struct it_key), 1,
+                        outf) != 1)
+            {
+                logf (LOG_FATAL|LOG_ERRNO, "fwrite %s", out_fname);
+                exit (1);
+            }
+            prevcp = cp;
+        }
+        else
         {
-            logf (LOG_FATAL|LOG_ERRNO, "Write key fail");
-            exit (1);
+            cp = strlen (cp) + cp;
+            if (fwrite (cp, 2+sizeof(struct it_key), 1, outf) != 1)
+            {
+                logf (LOG_FATAL|LOG_ERRNO, "fwrite %s", out_fname);
+                exit (1);
+            }
         }
-        i += w;
     }
-    key_offset = 0;
+    if (fclose (outf))
+    {
+        logf (LOG_FATAL|LOG_ERRNO, "fclose %s", out_fname);
+        exit (1);
+    }
+    logf (LOG_LOG, "finished section %d", key_file_no);
+    ptr_i = 0;
+    kused = 0;
 }
 
-void key_write (int cmd, struct it_key *k, const char *str)
+int key_close (void)
 {
-    char x;
-    size_t slen = strlen(str);
+    key_flush ();
+    xfree (key_buf);
+    close (sys_idx_fd);
+    dict_insert (file_idx, ".", sizeof(sysno_next), &sysno_next);
+    dict_close (file_idx);
+    return key_file_no;
+}
 
-    if (key_offset + sizeof(*k) + slen >= KEY_BUF_SIZE - 2)
-        key_flush ();
-    x = (cmd == 'a') ? 1 : 0;
-    memcpy (key_buf + key_offset, str, slen+1);
-    key_offset += slen+1;
-    memcpy (key_buf + key_offset, &x, 1);
-    key_offset++;
-    memcpy (key_buf + key_offset, k, sizeof(*k));
-    key_offset += sizeof(*k);
+static void wordInit (RecWord *p)
+{
+    p->attrSet = 1;
+    p->attrUse = 1016;
+    p->which = Word_String;
 }
 
-void text_extract (SYSNO sysno, int cmd, const char *fname)
+static void wordAdd (const RecWord *p)
 {
-    FILE *inf;
-    struct it_key k;
-    int seqno = 1;
-    int c;
-    char w[256];
-
-    logf (LOG_DEBUG, "Text extract of %d", sysno);
-    k.sysno = sysno;
-    inf = fopen (fname, "r");
-    if (!inf)
-    {
-        logf (LOG_WARN|LOG_ERRNO, "open %s", fname);
-        return;
-    }
-    while ((c=getc (inf)) != EOF)
+    struct it_key key;
+    size_t i;
+
+    if (kused + 1024 > (ptr_top-ptr_i)*sizeof(char*))
+        key_flush ();
+    ++ptr_i;
+    key_buf[ptr_top-ptr_i] = (char*)key_buf + kused;
+    kused += index_word_prefix ((char*)key_buf + kused,
+                                p->attrSet, p->attrUse);
+    switch (p->which)
     {
-        int i = 0;
-        while (i < 254 && c != EOF && isalnum(c))
-        {
-            w[i++] = c;
-            c = getc (inf);
-        }
-        if (i)
-        {
-            w[i] = 0;
-            
-            k.seqno = seqno++;
-            k.field = 0;
-            key_write (cmd, &k, w);
-        }
-        if (c == EOF)
-            break;
+    case Word_String:
+        for (i = 0; p->u.string[i]; i++)
+            ((char*)key_buf) [kused++] = index_char_cvt (p->u.string[i]);
+        ((char*)key_buf) [kused++] = '\0';
+        break;
+    default:
+        return ;
     }
-    fclose (inf);
+    key.sysno = key_sysno;
+    key.seqno = p->seqno;
+    memcpy ((char*)key_buf + kused, &key, sizeof(key));
+    kused += sizeof(key);
+
+    ((char*) key_buf)[kused++] = ((key_cmd == 'a') ? 1 : 0);
 }
 
 void file_extract (int cmd, const char *fname, const char *kname)
@@ -169,6 +227,9 @@ void file_extract (int cmd, const char *fname, const char *kname)
     char ext_res[128];
     const char *file_type;
     void *file_info;
+    FILE *inf;
+    struct recExtractCtrl extractCtrl;
+    RecType rt;
 
     logf (LOG_DEBUG, "%c %s k=%s", cmd, fname, kname);
     for (i = strlen(fname); --i >= 0; )
@@ -185,19 +246,31 @@ void file_extract (int cmd, const char *fname, const char *kname)
     sprintf (ext_res, "fileExtension.%s", ext);
     if (!(file_type = res_get (common_resource, ext_res)))
         return;
-    
+    if (!(rt = recType_byName (file_type)))
+        return;
     file_info = dict_lookup (file_idx, kname);
     if (!file_info)
     {
         sysno = sysno_next++;
         dict_insert (file_idx, kname, sizeof(sysno), &sysno);
         lseek (sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN, SEEK_SET);
+        write (sys_idx_fd, file_type, strlen (file_type)+1);
         write (sys_idx_fd, kname, strlen(kname)+1);
     }
     else
         memcpy (&sysno, (char*) file_info+1, sizeof(sysno));
-    if (!strcmp (file_type, "text"))
-        text_extract (sysno, cmd, fname);
-}
-
 
+    if (!(inf = fopen (fname, "r")))
+    {
+        logf (LOG_WARN|LOG_ERRNO, "open %s", fname);
+        return;
+    }
+    extractCtrl.inf = inf;
+    extractCtrl.subType = "";
+    extractCtrl.init = wordInit;
+    extractCtrl.add = wordAdd;
+    key_sysno = sysno;
+    key_cmd = cmd;
+    (*rt->extract)(&extractCtrl);
+    fclose (inf);
+}