qemu: URI parsing library

Add a new URI parsing library to QEMU. The code has been borrowed from
libxml2 and libvirt.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NBharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Makefile.objs

@@ -42,7 +42,7 @@ coroutine-obj-$(CONFIG_WIN32) += coroutine-win32.o
 # block-obj-y is code used by both qemu system emulation and qemu-img
 
 block-obj-y = cutils.o iov.o cache-utils.o qemu-option.o module.o async.o
-block-obj-y += nbd.o block.o aio.o aes.o qemu-config.o qemu-progress.o qemu-sockets.o
+block-obj-y += nbd.o block.o aio.o aes.o qemu-config.o qemu-progress.o qemu-sockets.o uri.o
 block-obj-y += $(coroutine-obj-y) $(qobject-obj-y) $(version-obj-y)
 block-obj-$(CONFIG_POSIX) += posix-aio-compat.o
 block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o

uri.h

+/**
+ * Summary: library of generic URI related routines
+ * Description: library of generic URI related routines
+ *              Implements RFC 2396
+ *
+ * Copyright (C) 1998-2003 Daniel Veillard.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * DANIEL VEILLARD BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Daniel Veillard shall not
+ * be used in advertising or otherwise to promote the sale, use or other
+ * dealings in this Software without prior written authorization from him.
+ *
+ * Author: Daniel Veillard
+ **
+ * Copyright (C) 2007 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ *
+ * Authors:
+ *    Richard W.M. Jones <rjones@redhat.com>
+ *
+ * Utility functions to help parse and assemble query strings.
+ */
+
+#ifndef QEMU_URI_H
+#define QEMU_URI_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * URI:
+ *
+ * A parsed URI reference. This is a struct containing the various fields
+ * as described in RFC 2396 but separated for further processing.
+ */
+typedef struct URI {
+    char *scheme;	/* the URI scheme */
+    char *opaque;	/* opaque part */
+    char *authority;	/* the authority part */
+    char *server;	/* the server part */
+    char *user;		/* the user part */
+    int port;		/* the port number */
+    char *path;		/* the path string */
+    char *fragment;	/* the fragment identifier */
+    int  cleanup;	/* parsing potentially unclean URI */
+    char *query;	/* the query string (as it appears in the URI) */
+} URI;
+
+URI *uri_new(void);
+char *uri_resolve(const char *URI, const char *base);
+char *uri_resolve_relative(const char *URI, const char *base);
+URI *uri_parse(const char *str);
+URI *uri_parse_raw(const char *str, int raw);
+int uri_parse_into(URI *uri, const char *str);
+char *uri_to_string(URI *uri);
+char *uri_string_escape(const char *str, const char *list);
+char *uri_string_unescape(const char *str, int len, char *target);
+void uri_free(URI *uri);
+
+/* Single web service query parameter 'name=value'. */
+typedef struct QueryParam {
+  char *name;			/* Name (unescaped). */
+  char *value;			/* Value (unescaped). */
+  int ignore;			/* Ignore this field in qparam_get_query */
+} QueryParam;
+
+/* Set of parameters. */
+typedef struct QueryParams {
+  int n;			/* number of parameters used */
+  int alloc;			/* allocated space */
+  QueryParam *p;		/* array of parameters */
+} QueryParams;
+
+struct QueryParams *query_params_new (int init_alloc);
+int query_param_append (QueryParams *ps, const char *name, const char *value);
+extern char *query_param_to_string (const QueryParams *ps);
+extern QueryParams *query_params_parse (const char *query);
+extern void query_params_free (QueryParams *ps);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* QEMU_URI_H */