retrieval/d1_write.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_write.c,v 1.10 2002-04-15 09:06:30 adam Exp $
   7  */
   8
   9 #include <string.h>
  10
  11 #include <yaz/data1.h>
  12 #include <yaz/wrbuf.h>
  13
  14 #define IDSGML_MARGIN 75
  15
  16 static int wordlen(char *b, int max)
  17 {
  18     int l = 0;
  19
  20     while (l < max && !d1_isspace(*b))
  21         l++, b++;
  22     return l;
  23 }
  24
  25 static int nodetoidsgml(data1_node *n, int select, WRBUF b, int col)
  26 {
  27     data1_node *c;
  28     char line[1024];
  29
  30     for (c = n->child; c; c = c->next)
  31     {
  32         char *tag;
  33
  34         if (c->which == DATA1N_tag)
  35         {
  36             if (select && c->u.tag.node_selected)
  37                 continue;
  38             tag = c->u.tag.tag;
  39             if (!data1_matchstr(tag, "wellknown")) /* skip wellknown */
  40             {
  41                 if (nodetoidsgml(c, select, b, col) < 0)
  42                     return -1;
  43             }
  44             else
  45             {
  46 #if DATA1_USING_XATTR
  47                 data1_xattr *p;
  48 #endif
  49                 sprintf (line, "%*s<", col, "");
  50                 wrbuf_puts (b, line);
  51                 wrbuf_puts (b, tag);
  52 #if DATA1_USING_XATTR
  53                 for (p = c->u.tag.attributes; p; p = p->next)
  54                 {
  55                     wrbuf_putc (b, ' ');
  56                     wrbuf_puts (b, p->name);
  57                     wrbuf_putc (b, '=');
  58                     wrbuf_putc (b, '"');
  59                     wrbuf_puts (b, p->value);
  60                     wrbuf_putc (b, '"');
  61                 }
  62 #endif
  63                 wrbuf_puts(b, ">\n");
  64                 if (nodetoidsgml(c, select, b, (col > 40) ? 40 : col+2) < 0)
  65                     return -1;
  66                 sprintf (line, "%*s</%s>\n", col, "", tag);
  67                 wrbuf_write(b, line, strlen(line));
  68             }
  69         }
  70         else if (c->which == DATA1N_data)
  71         {
  72             char *p = c->u.data.data;
  73             int l = c->u.data.len;
  74             int first = 1;
  75             int lcol = col;
  76
  77             sprintf(line, "%*s", col, "");
  78             wrbuf_write(b, line, strlen(line));
  79             switch (c->u.data.what)
  80             {
  81             case DATA1I_text:
  82                 while (l)
  83                 {
  84                     int wlen;
  85
  86                     while (l && d1_isspace(*p))
  87                         p++, l--;
  88                     if (!l)
  89                         break;
  90                     /* break if we'll cross margin and word is not too long */
  91                     if (lcol + (wlen = wordlen(p, l)) > IDSGML_MARGIN && wlen <
  92                         IDSGML_MARGIN)
  93                     {
  94                         sprintf(line, "\n%*s", col, "");
  95                         lcol = col;
  96                         wrbuf_write(b, line, strlen(line));
  97                         first = 1;
  98                     }
  99                     if (!first)
 100                     {
 101                         wrbuf_putc(b, ' ');
 102                         lcol++;
 103                     }
 104                     while (l && !d1_isspace(*p))
 105                     {
 106                         wrbuf_putc(b, *p);
 107                         p++;
 108                         l--;
 109                         lcol++;
 110                     }
 111                     first = 0;
 112                 }
 113                 wrbuf_write(b, "\n", 1);
 114                 break;
 115             case DATA1I_num:
 116                 wrbuf_write(b, c->u.data.data, c->u.data.len);
 117                 break;
 118             case DATA1I_oid:
 119                 wrbuf_write(b, c->u.data.data, c->u.data.len);
 120             }
 121         }
 122     }
 123     return 0;
 124 }
 125
 126 char *data1_nodetoidsgml (data1_handle dh, data1_node *n, int select, int *len)
 127 {
 128     WRBUF b = data1_get_wrbuf (dh);
 129     char line[1024];
 130
 131     wrbuf_rewind(b);
 132
 133     sprintf(line, "<%s>\n", n->u.root.type);
 134     wrbuf_write(b, line, strlen(line));
 135     if (nodetoidsgml(n, select, b, 0))
 136         return 0;
 137     sprintf(line, "</%s>\n", n->u.root.type);
 138     wrbuf_write(b, line, strlen(line));
 139     *len = wrbuf_len(b);
 140     return wrbuf_buf(b);
 141 }