data1 part of zebra

[idzebra-moved-to-github.git] / data1 / d1_write.c

diff --git a/data1/d1_write.c b/data1/d1_write.c
new file mode 100644 (file)
index 0000000..587e75d
--- /dev/null
+++ b/data1/d1_write.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright (c) 1995-2002, Index Data.
+ * See the file LICENSE for details.
+ * Sebastian Hammer, Adam Dickmeiss
+ *
+ * $Id: d1_write.c,v 1.1 2002-10-22 12:53:33 adam Exp $
+ */
+
+#include <string.h>
+
+#include <data1.h>
+#include <yaz/wrbuf.h>
+
+#define IDSGML_MARGIN 75
+
+#define PRETTY_FORMAT 0
+
+static int wordlen(char *b, int max)
+{
+    int l = 0;
+
+    while (l < max && !d1_isspace(*b))
+       l++, b++;
+    return l;
+}
+
+static void indent (WRBUF b, int col)
+{
+    int i;
+    for (i = 0; i<col; i++)
+        wrbuf_putc (b, ' ');
+}
+
+static void wrbuf_write_cdata(WRBUF b, const char *msg, int len)
+{
+    int i;
+
+    for (i = 0; i < len; i++)
+    {
+        switch (msg[i])
+        {
+        case '"':
+            wrbuf_puts (b, "&quot;");
+            break;
+        case '\'':
+            wrbuf_puts (b, "&apos;");
+            break;
+        case '>':
+            wrbuf_puts (b, "&gt;");
+            break;
+        case '<':
+            wrbuf_puts (b, "&lt;");
+            break;
+        case '&':
+            wrbuf_puts (b, "&amp;");
+            break;
+        default:
+            wrbuf_putc(b, msg[i]);
+        }
+    }
+}
+
+static void wrbuf_put_cdata(WRBUF b, const char *msg)
+{
+    wrbuf_write_cdata (b, msg, strlen(msg));
+}
+
+static void wrbuf_put_xattr(WRBUF b, data1_xattr *p)
+{
+    for (; p; p = p->next)
+    {
+        wrbuf_putc (b, ' ');
+        if (p->what == DATA1I_xmltext)
+            wrbuf_puts (b, p->name);
+        else
+            wrbuf_put_cdata (b, p->name);
+        if (p->value)
+        {
+            wrbuf_putc (b, '=');
+            wrbuf_putc (b, '"');
+            if (p->what == DATA1I_text)
+                wrbuf_put_cdata (b, p->value);
+            else
+                wrbuf_puts (b, p->value);
+            wrbuf_putc (b, '"');
+        }
+    }
+}
+
+static int nodetoidsgml(data1_node *n, int select, WRBUF b, int col,
+                        int pretty_format)
+{
+    data1_node *c;
+
+    for (c = n->child; c; c = c->next)
+    {
+       char *tag;
+
+        if (c->which == DATA1N_preprocess)
+        {
+            data1_xattr *p;
+
+            if (pretty_format)
+                indent (b, col);
+           wrbuf_puts (b, "<?");
+            wrbuf_put_cdata (b, c->u.preprocess.target);
+            wrbuf_put_xattr (b, c->u.preprocess.attributes);
+            if (c->child)
+                wrbuf_puts(b, " ");
+            if (nodetoidsgml(c, select, b, (col > 40) ? 40 : col+2,
+                             pretty_format) < 0)
+                return -1;
+            wrbuf_puts (b, "?>\n");
+        }
+        else if (c->which == DATA1N_tag)
+       {
+           if (select && !c->u.tag.node_selected)
+               continue;
+            tag = c->u.tag.tag;
+           if (!data1_matchstr(tag, "wellknown")) /* skip wellknown */
+           {
+               if (nodetoidsgml(c, select, b, col, pretty_format) < 0)
+                   return -1;
+           }
+           else
+           {
+               data1_xattr *p;
+
+                if (pretty_format)
+                    indent (b, col);
+               wrbuf_puts (b, "<");    
+               wrbuf_put_cdata (b, tag);
+                wrbuf_put_xattr (b, c->u.tag.attributes);
+               wrbuf_puts(b, ">");
+                if (pretty_format)
+                    wrbuf_puts(b, "\n");
+               if (nodetoidsgml(c, select, b, (col > 40) ? 40 : col+2,
+                                 pretty_format) < 0)
+                   return -1;
+                if (pretty_format)
+                    indent (b, col);
+               wrbuf_puts(b, "</");
+               wrbuf_put_cdata(b, tag);
+               wrbuf_puts(b, ">");
+                if (pretty_format)
+                    wrbuf_puts (b, "\n");
+           }
+       }
+       else if (c->which == DATA1N_data || c->which == DATA1N_comment)
+       {
+           char *p = c->u.data.data;
+           int l = c->u.data.len;
+           int first = 1;
+           int lcol = col;
+
+            if (pretty_format && !c->u.data.formatted_text)
+                indent (b, col);
+            if (c->which == DATA1N_comment)
+                wrbuf_puts (b, "<!--");
+           switch (c->u.data.what)
+           {
+            case DATA1I_xmltext:
+               wrbuf_write(b, c->u.data.data, c->u.data.len);
+                break;
+           case DATA1I_text:
+                if (!pretty_format || c->u.data.formatted_text)
+                {
+                    wrbuf_write_cdata (b, p, l);
+                }
+                else
+                {
+                    while (l)
+                    {
+                        int wlen;
+                        
+                        while (l && d1_isspace(*p))
+                            p++, l--;
+                        if (!l)
+                            break;
+                        /* break if we cross margin and word is not too long */
+                        if (lcol + (wlen = wordlen(p, l)) > IDSGML_MARGIN &&
+                            wlen < IDSGML_MARGIN)
+                        {
+                            wrbuf_puts (b, "\n");
+                            indent (b, col);
+                            lcol = col;
+                            first = 1;
+                        }
+                        if (!first)
+                        {
+                            wrbuf_putc(b, ' ');
+                            lcol++;
+                        }
+                        while (l && !d1_isspace(*p))
+                        {
+                            wrbuf_putc(b, *p);
+                            p++;
+                            l--;
+                            lcol++;
+                        }
+                        first = 0;
+                    }
+                    wrbuf_puts(b, "\n");
+                }
+               break;
+           case DATA1I_num:
+               wrbuf_write_cdata(b, c->u.data.data, c->u.data.len);
+                if (pretty_format)
+                    wrbuf_puts(b, "\n");
+               break;
+           case DATA1I_oid:
+               wrbuf_write_cdata(b, c->u.data.data, c->u.data.len);
+                if (pretty_format)
+                    wrbuf_puts(b, "\n");
+           }
+            if (c->which == DATA1N_comment)
+            {
+                wrbuf_puts(b, "-->");
+                if (pretty_format)
+                    wrbuf_puts(b, "\n");
+            }
+       }
+    }
+    return 0;
+}
+
+char *data1_nodetoidsgml (data1_handle dh, data1_node *n, int select, int *len)
+{
+    WRBUF b = data1_get_wrbuf (dh);
+    
+    wrbuf_rewind(b);
+    
+    if (!data1_is_xmlmode (dh))
+    {
+        wrbuf_puts (b, "<");
+        wrbuf_puts (b, n->u.root.type);
+        wrbuf_puts (b, ">\n");
+    }
+    if (nodetoidsgml(n, select, b, 0, 0 /* no pretty format */))
+       return 0;
+    if (!data1_is_xmlmode (dh))
+    {
+        wrbuf_puts (b, "</");
+        wrbuf_puts (b, n->u.root.type);
+        wrbuf_puts (b, ">\n");
+    }
+    *len = wrbuf_len(b);
+    return wrbuf_buf(b);
+}