C++ compilation.

[idzebra-moved-to-github.git] / recctrl / rectext.c

diff --git a/recctrl/rectext.c b/recctrl/rectext.c
index 321e414..bcc9d26 100644 (file)
--- a/recctrl/rectext.c
+++ b/recctrl/rectext.c
@@ -1,10 +1,47 @@
 /*
- * Copyright (C) 1994-1995, Index Data I/S 
+ * Copyright (C) 1994-1998, Index Data 
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: rectext.c,v $
- * Revision 1.1  1996-10-11 10:57:28  adam
+ * Revision 1.12  1999-05-26 07:49:14  adam
+ * C++ compilation.
+ *
+ * Revision 1.11  1999/05/21 12:00:17  adam
+ * Better diagnostics for extraction process.
+ *
+ * Revision 1.10  1999/05/20 12:57:18  adam
+ * Implemented TCL filter. Updated recctrl system.
+ *
+ * Revision 1.9  1998/10/16 08:14:38  adam
+ * Updated record control system.
+ *
+ * Revision 1.8  1998/05/20 10:12:27  adam
+ * Implemented automatic EXPLAIN database maintenance.
+ * Modified Zebra to work with ASN.1 compiled version of YAZ.
+ *
+ * Revision 1.7  1998/03/11 11:19:05  adam
+ * Changed the way sequence numbers are generated.
+ *
+ * Revision 1.6  1998/02/10 12:03:06  adam
+ * Implemented Sort.
+ *
+ * Revision 1.5  1997/10/27 14:33:06  adam
+ * Moved towards generic character mapping depending on "structure"
+ * field in abstract syntax file. Fixed a few memory leaks. Fixed
+ * bug with negative integers when doing searches with relational
+ * operators.
+ *
+ * Revision 1.4  1996/11/04 14:09:16  adam
+ * Minor changes.
+ *
+ * Revision 1.3  1996/11/01 09:00:33  adam
+ * This simple "text" format now supports element specs B and M.
+ *
+ * Revision 1.2  1996/10/29 14:02:45  adam
+ * Uses buffered read to speed up things.
+ *
+ * Revision 1.1  1996/10/11 10:57:28  adam
  * New module recctrl. Used to manage records (extract/retrieval).
  *
  * Revision 1.7  1996/01/17 14:57:55  adam
@@ -36,48 +73,99 @@
 #include <assert.h>
 #include <ctype.h>
 
-#include <alexutil.h>
+#include <zebrautl.h>
 #include "rectext.h"
 
-static void text_init (void)
+static void *text_init (RecType recType)
+{
+    return 0;
+}
+
+static void text_destroy (void *clientData)
+{
+}
+
+struct buf_info {
+    struct recExtractCtrl *p;
+    char *buf;
+    int offset;
+    int max;
+};
+
+struct buf_info *buf_open (struct recExtractCtrl *p)
 {
+    struct buf_info *fi = (struct buf_info *) xmalloc (sizeof(*fi));
+
+    fi->p = p;
+    fi->buf = (char *) xmalloc (4096);
+    fi->offset = 1;
+    fi->max = 1;
+    return fi;
+}
+
+int buf_read (struct buf_info *fi, char *dst)
+{
+    if (fi->offset >= fi->max)
+    {
+        if (fi->max <= 0)
+            return 0;
+        fi->max = (*fi->p->readf)(fi->p->fh, fi->buf, 4096);
+        fi->offset = 0;
+        if (fi->max <= 0)
+            return 0;
+    }
+    *dst = fi->buf[(fi->offset)++];
+    return 1;
 }
 
-static int text_extract (struct recExtractCtrl *p)
+void buf_close (struct buf_info *fi)
 {
-    char w[256];
+    xfree (fi->buf);
+    xfree (fi);
+}
+
+static int text_extract (void *clientData, struct recExtractCtrl *p)
+{
+    char w[512];
     RecWord recWord;
-    int r, seqno = 1;
+    int r;
+    struct buf_info *fi = buf_open (p);
 
-    (*p->init)(&recWord);
-    recWord.which = Word_String;
+    (*p->init)(p, &recWord);
+    recWord.reg_type = 'w';
     do
     {
         int i = 0;
-
-        r = (*p->readf)(p->fh, w, 1);
-        while (r > 0 && i < 255 && isalnum(w[i]))
+            
+        r = buf_read (fi, w);
+        while (r > 0 && i < 511 && w[i] != '\n' && w[i] != '\r')
         {
             i++;
-            r = (*p->readf) (p->fh, w + i, 1);
+            r = buf_read (fi, w + i);
         }
         if (i)
         {
-            w[i] = 0;
-            recWord.seqno = seqno++;
-            recWord.u.string = w;
-            (*p->add)(&recWord);
+            recWord.string = w;
+           recWord.length = i;
+            (*p->addWord)(&recWord);
         }
     } while (r > 0);
-    return 0;
+    buf_close (fi);
+    return RECCTRL_EXTRACT_OK;
 }
 
-static int text_retrieve (struct recRetrieveCtrl *p)
+static int text_retrieve (void *clientData, struct recRetrieveCtrl *p)
 {
     int r, text_ptr = 0;
     static char *text_buf = NULL;
     static int text_size = 0;
     int start_flag = 1;
+    const char *elementSetName = NULL;
+    int no_lines = 0;
+
+    if (p->comp && p->comp->which == Z_RecordComp_simple &&
+        p->comp->u.simple->which == Z_ElementSetNames_generic)
+        elementSetName = p->comp->u.simple->u.generic;
 
     while (1)
     {
@@ -86,7 +174,7 @@ static int text_retrieve (struct recRetrieveCtrl *p)
             char *nb;
 
             text_size = 2*text_size + 8192;
-            nb = xmalloc (text_size);
+            nb = (char *) xmalloc (text_size);
             if (text_buf)
             {
                 memcpy (nb, text_buf, text_ptr);
@@ -110,6 +198,27 @@ static int text_retrieve (struct recRetrieveCtrl *p)
             break;
         text_ptr += r;
     }
+    text_buf[text_ptr] = '\0';
+    if (elementSetName)
+    {
+        if (!strcmp (elementSetName, "B"))
+            no_lines = 4;
+        if (!strcmp (elementSetName, "M"))
+            no_lines = 20;
+    }
+    if (no_lines)
+    {
+        char *p = text_buf;
+        int i = 0;
+
+        while (++i <= no_lines && (p = strchr (p, '\n')))
+            p++;
+        if (p)
+        {
+            p[1] = '\0';
+            text_ptr = p-text_buf;
+        }
+    }
     p->output_format = VAL_SUTRS;
     p->rec_buf = text_buf;
     p->rec_len = text_ptr; 
@@ -119,6 +228,7 @@ static int text_retrieve (struct recRetrieveCtrl *p)
 static struct recType text_type = {
     "text",
     text_init,
+    text_destroy,
     text_extract,
     text_retrieve
 };