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 1.7 2002-05-03 13:48:27 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 && c->u.data.formatted_text)
  59             {
  60                 wrbuf_putc(b, '\n');
  61                 wrbuf_write(b, c->u.data.data, c->u.data.len);
  62                 sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
  63                 wrbuf_write(b, line, strlen(line));
  64                 col = indent * NTOBUF_INDENT;
  65             }
  66             else if (c->u.data.what == DATA1I_text)
  67             {
  68                 while (l)
  69                 {
  70                     int wlen;
  71
  72                     while (l && d1_isspace(*p))
  73                         p++, l--;
  74                     if (!l)
  75                         break;
  76                     /* break if we'll cross margin and word is not too long */
  77                     if (col + (wlen = wordlen(p, l)) > NTOBUF_MARGIN && wlen <
  78                         NTOBUF_MARGIN - indent * NTOBUF_INDENT)
  79                     {
  80                         sprintf(line, "\n%*s", indent * NTOBUF_INDENT, "");
  81                         wrbuf_write(b, line, strlen(line));
  82                         col = indent * NTOBUF_INDENT;
  83                         first = 1;
  84                     }
  85                     if (!first)
  86                     {
  87                         wrbuf_putc(b, ' ');
  88                         col++;
  89                     }
  90                     while (l && !d1_isspace(*p))
  91                     {
  92                         if (col > NTOBUF_MARGIN)
  93                         {
  94                             wrbuf_putc(b, '=');
  95                             wrbuf_putc(b, '\n');
  96                             sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
  97                             wrbuf_write(b, line, strlen(line));
  98                             col = indent * NTOBUF_INDENT;
  99                         }
 100                         wrbuf_putc(b, *p);
 101                         p++;
 102                         l--;
 103                         col++;
 104                     }
 105                     first = 0;
 106                 }
 107             }
 108             else if (c->u.data.what == DATA1I_num)
 109             {
 110                 wrbuf_putc(b, ' ');
 111                 wrbuf_write(b, c->u.data.data, c->u.data.len);
 112             }
 113         }
 114     }
 115     return 0;
 116 }
 117
 118 /*
 119  * Return area containing SUTRS-formatted data. Ownership of this data
 120  * remains in this module, and the buffer is reused on next call. This may
 121  * need changing.
 122  */
 123
 124 char *data1_nodetobuf (data1_handle dh, data1_node *n, int select, int *len)
 125 {
 126     WRBUF b = data1_get_wrbuf (dh);
 127
 128     wrbuf_rewind(b);
 129     if (nodetobuf(n, select, b, 0, 0))
 130         return 0;
 131     wrbuf_putc(b, '\n');
 132     *len = wrbuf_len(b);
 133     return wrbuf_buf(b);
 134 }