[Qemu-devel] [PATCH v24 07/31] QemuOpts: add qemu_opts_print_help to replace print_option_help

[Chunyan Liu <cyliu@suse.com>]

print_option_help takes QEMUOptionParameter as parameter, add
qemu_opts_print_help to take QemuOptsList as parameter for later
replace work.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Chunyan Liu <cyliu@suse.com>
---
Changes:
  * check non-empty list

 include/qemu/option.h |  1 +
 util/qemu-option.c    | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/qemu/option.h b/include/qemu/option.h
index 6653e43..fbf5dc2 100644
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -166,5 +166,6 @@ typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
 void qemu_opts_print(QemuOpts *opts);
 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
                       int abort_on_failure);
+void qemu_opts_print_help(QemuOptsList *list);
 
 #endif
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 786c687..26710d6 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -553,6 +553,19 @@ void print_option_help(QEMUOptionParameter *list)
     }
 }
 
+void qemu_opts_print_help(QemuOptsList *list)
+{
+    QemuOptDesc *desc;
+
+    assert(list);
+    desc = list->desc;
+    printf("Supported options:\n");
+    while (desc && desc->name) {
+        printf("%-16s %s\n", desc->name,
+               desc->help ? desc->help : "No description available");
+        desc++;
+    }
+}
 /* ------------------------------------------------------------------ */
 
 static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
-- 
1.7.12.4