This patch will create 4 functions, count_opts_list, append_opts_list,
free_opts_list and print_opts_list, they will used in following commits.
v6->v7):
1) Fix typo: enouth->enough.
v5->v6):
1) allocate enough space in append_opts_list function.
Signed-off-by: Dong Xu Wang <wdon...@linux.vnet.ibm.com>
---
qemu-option.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
qemu-option.h | 4 ++
2 files changed, 94 insertions(+), 0 deletions(-)
diff --git a/qemu-option.c b/qemu-option.c
index e0628da..fb912c1 100644
--- a/qemu-option.c
+++ b/qemu-option.c
@@ -1145,3 +1145,93 @@ int qemu_opts_foreach(QemuOptsList *list,
qemu_opts_loopfunc func, void *opaque,
loc_pop(&loc);
return rc;
}
+
+static size_t count_opts_list(QemuOptsList *list)
+{
+ size_t i = 0;
+
+ while (list && list->desc[i].name) {
+ i++;
+ }
+
+ return i;
+}
+
+/* Create a new QemuOptsList and make its desc to the merge of first and
second.
+ * It will allocate space for one new QemuOptsList plus enough space for
+ * QemuOptDesc in first and second QemuOptsList. First argument's QemuOptDesc
+ * members take precedence over second's.
+ */
+QemuOptsList *append_opts_list(QemuOptsList *first,
+ QemuOptsList *second)
+{
+ size_t num_first_options, num_second_options;
+ QemuOptsList *dest = NULL;
+ int i = 0;
+ int index = 0;
+
+ num_first_options = count_opts_list(first);
+ num_second_options = count_opts_list(second);
+ if (num_first_options + num_second_options == 0) {
+ return NULL;
+ }
+
+ dest = g_malloc0(sizeof(QemuOptsList)
+ + (num_first_options + num_second_options + 1) * sizeof(QemuOptDesc));
+
+ dest->name = "append_opts_list";
+ dest->implied_opt_name = NULL;
+ dest->merge_lists = false;
+ QTAILQ_INIT(&dest->head);
+ while (first && (first->desc[i].name)) {
+ if (!find_desc_by_name(dest->desc, first->desc[i].name)) {
+ dest->desc[index].name = g_strdup(first->desc[i].name);
+ dest->desc[index].help = g_strdup(first->desc[i].help);
+ dest->desc[index].type = first->desc[i].type;
+ dest->desc[index].def_print_str =
+ g_strdup(first->desc[i].def_print_str);
+ ++index;
+ }
+ i++;
+ }
+ i = 0;
+ while (second && (second->desc[i].name)) {
+ if (!find_desc_by_name(dest->desc, second->desc[i].name)) {
+ dest->desc[index].name = g_strdup(first->desc[i].name);
+ dest->desc[index].help = g_strdup(first->desc[i].help);
+ dest->desc[index].type = second->desc[i].type;
+ dest->desc[index].def_print_str =
+ g_strdup(second->desc[i].def_print_str);
+ ++index;
+ }
+ i++;
+ }
+ dest->desc[index].name = NULL;
+ return dest;
+}
+
+void free_opts_list(QemuOptsList *list)
+{
+ int i = 0;
+
+ while (list && list->desc[i].name) {
+ g_free((char *)list->desc[i].name);
+ g_free((char *)list->desc[i].help);
+ g_free((char *)list->desc[i].def_print_str);
+ i++;
+ }
+
+ g_free(list);
+}
+
+void print_opts_list(QemuOptsList *list)
+{
+ int i = 0;
+ printf("Supported options:\n");
+ while (list && list->desc[i].name) {
+ printf("%-16s %s\n", list->desc[i].name,
+ list->desc[i].help ?
+ list->desc[i].help : "No description available");
+ i++;
+ }
+}
diff --git a/qemu-option.h b/qemu-option.h
index ab02023..091a2f2 100644
--- a/qemu-option.h
+++ b/qemu-option.h
@@ -156,4 +156,8 @@ int qemu_opts_print(QemuOpts *opts, void *dummy);
int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void
*opaque,
int abort_on_failure);
+QemuOptsList *append_opts_list(QemuOptsList *dest,
+ QemuOptsList *list);
+void free_opts_list(QemuOptsList *list);
+void print_opts_list(QemuOptsList *list);
#endif
--
1.7.1
