From ef65cb38bdb135423561726a9e19be076292318a Mon Sep 17 00:00:00 2001
From: Richard Wilson <rjw@netsurf-browser.org>
Date: Fri, 1 Dec 2006 21:09:49 +0000
Subject: Fix 1535120, 1528673

svn path=/trunk/netsurf/; revision=3087
---
 utils/url.c | 36 ++++++++++++++++++++++++++++++++++++
 utils/url.h |  1 +
 2 files changed, 37 insertions(+)

(limited to 'utils')

diff --git a/utils/url.c b/utils/url.c
index 1c8005a5d..f6f7fdc9d 100644
--- a/utils/url.c
+++ b/utils/url.c
@@ -63,6 +63,42 @@ void url_init(void)
 }
 
 
+/**
+ * Check whether a host is an IP address
+ *
+ * \param  host    a hostname terminated by '\0' or '/'
+ * \return true if the hostname is an IP address, false otherwise
+ */
+bool url_host_is_ip_address(const char *host) {
+  	int b;
+  	bool n;
+
+	assert(host);
+	
+	/* an IP address is of the format XXX.XXX.XXX.XXX, ie totally
+	 * numeric with 3 full stops between the numbers */
+	b = 0; // number of breaks
+	n = false; // number present
+	do {
+		if (*host == '.') {
+		  	if (!n)
+		  		return false;
+			b++;
+			n = false;
+		} else if ((*host == '\0') || (*host == '/')) {
+		  	if (!n)
+		  		return false;
+		  	/* todo: check the values are in 0-255 range */
+		  	return (b == 3);
+		} else if (*host < '0' || *host > '9') {
+		  	return false;
+                } else {
+                	n = true;
+                }
+                *host++;
+        } while (1);
+}
+
 /**
  * Normalize a URL.
  *
diff --git a/utils/url.h b/utils/url.h
index e9ad7fcb4..1467811b7 100644
--- a/utils/url.h
+++ b/utils/url.h
@@ -29,6 +29,7 @@ struct url_components {
 };
 
 void url_init(void);
+bool url_host_is_ip_address(const char *host);
 url_func_result url_normalize(const char *url, char **result);
 url_func_result url_join(const char *rel, const char *base, char **result);
 url_func_result url_host(const char *url, char **result);
-- 
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