From e44f985bd4f796d4c4b11eb3555436dbaa2d163b Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Mon, 18 Oct 1999 18:03:37 +0000
Subject: Further development; mid-end index handling pretty much there!

[originally from svn r238]
---
 misc.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'misc.c')

diff --git a/misc.c b/misc.c
index c9ea115..3ead01c 100644
--- a/misc.c
+++ b/misc.c
@@ -40,3 +40,47 @@ void *stk_pop(stack s) {
     else
 	return NULL;
 }
+
+int compare_wordlists(word *a, word *b) {
+    int t;
+    while (a && b) {
+	if (a->type != b->type)
+	    return (a->type < b->type ? -1 : +1);   /* FIXME? */
+	t = a->type;
+	if ((t != word_Normal && t != word_Code &&
+	     t != word_WeakCode && t != word_Emph) ||
+	    a->alt || b->alt) {
+	    int c;
+	    if (a->text && b->text) {
+		c = ustricmp(a->text, b->text);
+		if (c)
+		    return c;
+	    }
+	    c = compare_wordlists(a->alt, b->alt);
+	    if (c)
+		return c;
+	    a = a->next;
+	    b = b->next;
+	} else {
+	    wchar_t *ap = a->text, *bp = b->text;
+	    while (*ap && *bp) {
+		wchar_t ac = utolower(*ap), bc = utolower(*bp);
+		if (ac != bc)
+		    return (ac < bc ? -1 : +1);
+		if (!*++ap && a->next && a->next->type == t && !a->next->alt)
+		    a = a->next, ap = a->text;
+		if (!*++bp && b->next && b->next->type == t && !b->next->alt)
+		    b = b->next, bp = b->text;
+	    }
+	    if (*ap || *bp)
+		return (*ap ? +1 : -1);
+	    a = a->next;
+	    b = b->next;
+	}
+    }
+
+    if (a || b)
+	return (a ? +1 : -1);
+    else
+	return 0;
+}
-- 
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