[Qemu-devel] [PATCH V4 07/10] add def_value and use it in qemu_opts_print.

[Dong Xu Wang <wdongxu@linux.vnet.ibm.com>]

qemu_opts_print has no user now, so I re-write it and use it in
qemu-img.c.

qemu_opts_print will be used while using "qemu-img create", it will
produce the same output as previous code.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
---
 qemu-option.c |   41 ++++++++++++++++++++++++++++++++---------
 qemu-option.h |    1 +
 2 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/qemu-option.c b/qemu-option.c
index eeb2c9c..54dbdd0 100644
--- a/qemu-option.c
+++ b/qemu-option.c
@@ -860,15 +860,38 @@ void qemu_opts_del(QemuOpts *opts)
 
 int qemu_opts_print(QemuOpts *opts, void *dummy)
 {
-    QemuOpt *opt;
-
-    fprintf(stderr, "%s: %s:", opts->list->name,
-            opts->id ? opts->id : "<noid>");
-    QTAILQ_FOREACH(opt, &opts->head, next) {
-        fprintf(stderr, " %s=\"%s\"", opt->name, opt->str);
-    }
-    fprintf(stderr, "\n");
-    return 0;
+    QemuOpt *opt = NULL;
+    QemuOptDesc *desc = opts->list->desc;
+
+    while (desc && desc->name) {
+        opt = qemu_opt_find(opts, desc->name);
+        switch (desc->type) {
+        case QEMU_OPT_STRING:
+            if (opt != NULL) {
+                printf("%s='%s' ", opt->name, opt->str);
+            }
+            break;
+        case QEMU_OPT_BOOL:
+            printf("%s=%s ", desc->name, (opt && opt->str) ? "on" : "off");
+            break;
+        case QEMU_OPT_NUMBER:
+        case QEMU_OPT_SIZE:
+            if (strcmp(desc->name, "cluster_size")) {
+                printf("%s=%" PRId64 " ", desc->name,
+                    (opt && opt->value.uint) ? opt->value.uint : 0);
+            } else {
+                printf("%s=%" PRId64 " ", desc->name,
+                    (opt && opt->value.uint) ?
+                        opt->value.uint : desc->def_value);
+            }
+            break;
+        default:
+            printf("%s=(unknown type) ", desc->name);
+            break;
+        }
+        desc++;
+     }
+     return 0;
 }
 
 static int opts_do_parse(QemuOpts *opts, const char *params,
diff --git a/qemu-option.h b/qemu-option.h
index 002dd07..9ea59cf 100644
--- a/qemu-option.h
+++ b/qemu-option.h
@@ -96,6 +96,7 @@ typedef struct QemuOptDesc {
     const char *name;
     enum QemuOptType type;
     const char *help;
+    uint64_t def_value;
 } QemuOptDesc;
 
 struct QemuOptsList {
-- 
1.7.1