retrieval/d1_sutrs.c

   1 /*
   2  * Copyright (c) 1995-1997, Index Data.
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Log: d1_sutrs.c,v $
   7  * Revision 1.4  1997-09-17 12:10:38  adam
   8  * YAZ version 1.4.
   9  *
  10  * Revision 1.3  1995/12/15 16:57:11  quinn
  11  * Added formatted-text.
  12  *
  13  * Revision 1.2  1995/11/01  13:54:49  quinn
  14  * Minor adjustments
  15  *
  16  * Revision 1.1  1995/11/01  11:56:09  quinn
  17  * Added Retrieval (data management) functions en masse.
  18  *
  19  *
  20  */
  21
  22 #include <ctype.h>
  23
  24 #include <data1.h>
  25
  26 #define NTOBUF_INDENT   2
  27 #define NTOBUF_MARGIN 75
  28
  29 static int wordlen(char *b)
  30 {
  31     int l = 0;
  32
  33     while (*b && !isspace(*b))
  34         l++, b++;
  35     return l;
  36 }
  37
  38 static int nodetobuf(data1_node *n, int select, WRBUF b, int indent, int col)
  39 {
  40     data1_node *c;
  41     char line[1024];
  42
  43     for (c = n->child; c; c = c->next)
  44     {
  45         char *tag;
  46
  47         if (c->which == DATA1N_tag)
  48         {
  49             if (select && !c->u.tag.node_selected)
  50                 continue;
  51             if (c->u.tag.element && c->u.tag.element->tag)
  52                 tag = c->u.tag.element->tag->names->name; /* first name */
  53             else
  54                 tag = c->u.tag.tag; /* local string tag */
  55             if (data1_matchstr(tag, "wellknown")) /* skip wellknown */
  56             {
  57                 if (col)
  58                     wrbuf_putc(b, '\n');
  59                 sprintf(line, "%*s%s:", indent * NTOBUF_INDENT, "", tag);
  60                 wrbuf_write(b, line, strlen(line));
  61                 col = strlen(line);
  62             }
  63             if (nodetobuf(c, select, b, indent+1, col) < 0)
  64                 return 0;
  65         }
  66         else if (c->which == DATA1N_data)
  67         {
  68             char *p = c->u.data.data;
  69             int l = c->u.data.len;
  70             int first = 0;
  71
  72             if (c->u.data.what == DATA1I_text && c->u.data.formatted_text)
  73             {
  74                 wrbuf_putc(b, '\n');
  75                 wrbuf_write(b, c->u.data.data, c->u.data.len);
  76                 sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
  77                 wrbuf_write(b, line, strlen(line));
  78                 col = indent * NTOBUF_INDENT;
  79             }
  80             else if (c->u.data.what == DATA1I_text)
  81             {
  82                 while (l)
  83                 {
  84                     int wlen;
  85
  86                     while (l && 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 (col + (wlen = wordlen(p)) > NTOBUF_MARGIN && wlen <
  92                         NTOBUF_MARGIN - indent * NTOBUF_INDENT)
  93                     {
  94                         sprintf(line, "\n%*s", indent * NTOBUF_INDENT, "");
  95                         wrbuf_write(b, line, strlen(line));
  96                         col = indent * NTOBUF_INDENT;
  97                         first = 1;
  98                     }
  99                     if (!first)
 100                     {
 101                         wrbuf_putc(b, ' ');
 102                         col++;
 103                     }
 104                     while (l && !isspace(*p))
 105                     {
 106                         if (col > NTOBUF_MARGIN)
 107                         {
 108                             wrbuf_putc(b, '=');
 109                             wrbuf_putc(b, '\n');
 110                             sprintf(line, "%*s", indent * NTOBUF_INDENT, "");
 111                             wrbuf_write(b, line, strlen(line));
 112                             col = indent * NTOBUF_INDENT;
 113                         }
 114                         wrbuf_putc(b, *p);
 115                         p++;
 116                         l--;
 117                         col++;
 118                     }
 119                     first = 0;
 120                 }
 121             }
 122             else if (c->u.data.what == DATA1I_num)
 123             {
 124                 wrbuf_putc(b, ' ');
 125                 wrbuf_write(b, c->u.data.data, c->u.data.len);
 126             }
 127         }
 128     }
 129     return 0;
 130 }
 131
 132 /*
 133  * Return area containing SUTRS-formatted data. Ownership of this data
 134  * remains in this module, and the buffer is reused on next call. This may
 135  * need changing.
 136  */
 137
 138 char *data1_nodetobuf (data1_handle dh, data1_node *n, int select, int *len)
 139 {
 140     WRBUF b = data1_get_wrbuf (dh);
 141
 142     wrbuf_rewind(b);
 143     if (nodetobuf(n, select, b, 0, 0))
 144         return 0;
 145     wrbuf_putc(b, '\n');
 146     *len = wrbuf_len(b);
 147     return wrbuf_buf(b);
 148 }