[PATCH V7 11/24] migration: enhance migrate_uri_parse

[Steve Sistare <steven.sistare@oracle.com>]

Export migrate_uri_parse for use outside migration internals, and define
a method migrate_is_uri that indicates when migrate_uri_parse should
be used.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
---
 include/migration/misc.h |  7 +++++++
 migration/migration.c    | 11 +++++++++++
 migration/migration.h    |  2 --
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/include/migration/misc.h b/include/migration/misc.h
index 67f7ef7..c660be8 100644
--- a/include/migration/misc.h
+++ b/include/migration/misc.h
@@ -108,4 +108,11 @@ bool migration_in_bg_snapshot(void);
 bool migration_block_activate(Error **errp);
 bool migration_block_inactivate(void);
 
+/* True if @uri starts with a syntactically valid URI prefix */
+bool migrate_is_uri(const char *uri);
+
+/* Parse @uri and return @channel, returning true on success */
+bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
+                       Error **errp);
+
 #endif
diff --git a/migration/migration.c b/migration/migration.c
index fce7b22..b5ee98e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -14,6 +14,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/ctype.h"
 #include "qemu/cutils.h"
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
@@ -587,6 +588,16 @@ void migrate_add_address(SocketAddress *address)
                       QAPI_CLONE(SocketAddress, address));
 }
 
+bool migrate_is_uri(const char *uri)
+{
+    while (*uri && *uri != ':') {
+        if (!qemu_isalpha(*uri++)) {
+            return false;
+        }
+    }
+    return *uri == ':';
+}
+
 bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
                        Error **errp)
 {
diff --git a/migration/migration.h b/migration/migration.h
index 0df2a18..1d4d4e9 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -519,8 +519,6 @@ bool check_dirty_bitmap_mig_alias_map(const BitmapMigrationNodeAliasList *bbm,
                                       Error **errp);
 
 void migrate_add_address(SocketAddress *address);
-bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
-                       Error **errp);
 int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque);
 
 #define qemu_ram_foreach_block \
-- 
1.8.3.1