retrieval/d1_sutrs.c

   1 /*
   2  * Copyright (c) 1995-2002, Index Data.
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Id: d1_sutrs.c,v 1.8 2002-10-08 22:18:23 adam Exp $
   7  *
   8  */
   9
  10 #include <yaz/data1.h>
  11
  12 #define NTOBUF_INDENT   2
  13 #define NTOBUF_MARGIN 75
  14
  15 static int wordlen(char *b, int i)
  16 {
  17     int l = 0;
  18
  19     while (i && !d1_isspace(*b))
  20         l++, b++, i--;
  21     return l;
  22 }
  23
  24 static int nodetobuf(data1_node *n, int select, WRBUF b, int indent, int col)
  25 {
  26     data1_node *c;
  27     char line[1024];
  28
  29     for (c = n->child; c; c = c->next)
  30     {
  31         char *tag;
  32
  33         if (c->which == DATA1N_tag)
  34         {
  35             if (select && !c->u.tag.node_selected)
  36                 continue;
  37             if (c->u.tag.element && c->u.tag.element->tag)
  38                 tag = c->u.tag.element->tag->names->name; /* first name */
  39             else
  40                 tag = c->u.tag.tag; /* local string tag */
  41             if (data1_matchstr(tag, "wellknown")) /* skip wellknown */
  42             {
  43                 if (col)
  44                     wrbuf_putc(b, '\n');
  45                 sprintf(line, "%*s%s:", indent * NTOBUF_INDENT, "", tag);
  46                 wrbuf_write(b, line, strlen(line));
  47                 col = strlen(line);
  48             }
  49             if (nodetobuf(c, select, b, indent+1, col) < 0)
  50                 return 0;
  51         }
  52         else if (c->which == DATA1N_data)
  53         {
  54             char *p = c->u.data.data;
  55             int l = c->u.data.len;
  56             int first = 0;
  57
  58             if ((c->u.data.what == DATA1I_text ||
  59                 c->u.data.what == DATA1I_xmltext) && c->u.data.formatted_text)
  60             {
  61                 wrbuf_putc(b, '\n');
  62                 wrbuf_write(b, c->u.data.data, c->u.data.len);
  63                 sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
  64                 wrbuf_write(b, line, strlen(line));
  65                 col = indent * NTOBUF_INDENT;
  66             }
  67             else if (c->u.data.what == DATA1I_text ||
  68                      c->u.data.what == DATA1I_xmltext)
  69             {
  70                 while (l)
  71                 {
  72                     int wlen;
  73
  74                     while (l && d1_isspace(*p))
  75                         p++, l--;
  76                     if (!l)
  77                         break;
  78                     /* break if we'll cross margin and word is not too long */
  79                     if (col + (wlen = wordlen(p, l)) > NTOBUF_MARGIN && wlen <
  80                         NTOBUF_MARGIN - indent * NTOBUF_INDENT)
  81                     {
  82                         sprintf(line, "\n%*s", indent * NTOBUF_INDENT, "");
  83                         wrbuf_write(b, line, strlen(line));
  84                         col = indent * NTOBUF_INDENT;
  85                         first = 1;
  86                     }
  87                     if (!first)
  88                     {
  89                         wrbuf_putc(b, ' ');
  90                         col++;
  91                     }
  92                     while (l && !d1_isspace(*p))
  93                     {
  94                         if (col > NTOBUF_MARGIN)
  95                         {
  96                             wrbuf_putc(b, '=');
  97                             wrbuf_putc(b, '\n');
  98                             sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
  99                             wrbuf_write(b, line, strlen(line));
 100                             col = indent * NTOBUF_INDENT;
 101                         }
 102                         wrbuf_putc(b, *p);
 103                         p++;
 104                         l--;
 105                         col++;
 106                     }
 107                     first = 0;
 108                 }
 109             }
 110             else if (c->u.data.what == DATA1I_num)
 111             {
 112                 wrbuf_putc(b, ' ');
 113                 wrbuf_write(b, c->u.data.data, c->u.data.len);
 114             }
 115         }
 116     }
 117     return 0;
 118 }
 119
 120 /*
 121  * Return area containing SUTRS-formatted data. Ownership of this data
 122  * remains in this module, and the buffer is reused on next call. This may
 123  * need changing.
 124  */
 125
 126 char *data1_nodetobuf (data1_handle dh, data1_node *n, int select, int *len)
 127 {
 128     WRBUF b = data1_get_wrbuf (dh);
 129
 130     wrbuf_rewind(b);
 131     if (nodetobuf(n, select, b, 0, 0))
 132         return 0;
 133     wrbuf_putc(b, '\n');
 134     *len = wrbuf_len(b);
 135     return wrbuf_buf(b);
 136 }