Function for adding fragment onto nsurl.

svn path=/trunk/netsurf/; revision=13087

2 files changed, 79 insertions, 1 deletions

diff --git a/utils/nsurl.c b/utils/nsurl.c
index bb7b5068e..19ccc4374 100644
--- a/utils/nsurl.c
+++ b/utils/nsurl.c
@@ -1691,3 +1691,63 @@ nserror nsurl_defragment(const nsurl *url, nsurl **no_frag)
 	return NSERROR_OK;
 }
 
+
+/* exported interface, documented in nsurl.h */
+nserror nsurl_refragment(const nsurl *url, lwc_string *frag, nsurl **new_url)
+{
+	int frag_len;
+	int base_len;
+	char *pos;
+
+	assert(url != NULL);
+	assert(frag != NULL);
+
+	/* Create NetSurf URL object */
+	*new_url = malloc(sizeof(nsurl));
+	if (*new_url == NULL) {
+		return NSERROR_NOMEM;
+	}
+
+	/* Find the change in length from url to new_url */
+	base_len = url->length;
+	if (url->fragment != NULL) {
+		base_len -= 1 + lwc_string_length(url->fragment);
+	}
+	frag_len = lwc_string_length(frag);
+
+	/* Set new_url's length */
+	(*new_url)->length = base_len + 1 /* # */ + frag_len;
+
+	/* Create new_url's url string */
+	(*new_url)->string = malloc((*new_url)->length + 1 /* \0 */);
+	if ((*new_url)->string == NULL) {
+		free(*new_url);
+		*new_url = NULL;
+		return NSERROR_NOMEM;
+	}
+
+	/* Set string */
+	pos = (*new_url)->string;
+	memcpy(pos, url->string, base_len);
+	pos += base_len;
+	*pos = '#';
+	memcpy(++pos, lwc_string_data(frag), frag_len);
+	pos += frag_len;
+	*pos = '\0';
+
+	/* Copy components */
+	(*new_url)->scheme = nsurl__component_copy(url->scheme);
+	(*new_url)->username = nsurl__component_copy(url->username);
+	(*new_url)->password = nsurl__component_copy(url->password);
+	(*new_url)->host = nsurl__component_copy(url->host);
+	(*new_url)->port = nsurl__component_copy(url->port);
+	(*new_url)->path = nsurl__component_copy(url->path);
+	(*new_url)->query = nsurl__component_copy(url->query);
+	(*new_url)->fragment = lwc_string_ref(frag);
+
+	/* Give the URL a reference */
+	(*new_url)->count = 1;
+
+	return NSERROR_OK;
+}
+
diff --git a/utils/nsurl.h b/utils/nsurl.h
index c708e0483..46496f212 100644
--- a/utils/nsurl.h
+++ b/utils/nsurl.h
@@ -212,7 +212,7 @@ nserror nsurl_join(const nsurl *base, const char *rel, nsurl **joined);
 /**
  * Create a NetSurf URL object without a fragment from a NetSurf URL
  *
- * \param base	  NetSurf URL to create new NetSurf URL from
+ * \param url	  NetSurf URL to create new NetSurf URL from
  * \param no_frag Returns new NetSurf URL without fragment
  * \return NSERROR_OK on success, appropriate error otherwise
  *
@@ -223,4 +223,22 @@ nserror nsurl_join(const nsurl *base, const char *rel, nsurl **joined);
  */
 nserror nsurl_defragment(const nsurl *url, nsurl **no_frag);
 
+
+/**
+ * Create a NetSurf URL object, adding a fragment to an existing URL object
+ *
+ * \param url	  NetSurf URL to create new NetSurf URL from
+ * \param frag	  Fragment to add
+ * \param new_url Returns new NetSurf URL without fragment
+ * \return NSERROR_OK on success, appropriate error otherwise
+ *
+ * If return value != NSERROR_OK, nothing will be returned in new_url.
+ *
+ * It is up to the client to call nsurl_destroy when they are finished with
+ * the created object.
+ *
+ * Any fragment in url is replaced with frag in new_url.
+ */
+nserror nsurl_refragment(const nsurl *url, lwc_string *frag, nsurl **new_url);
+
 #endif