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[Qemu-devel] [PATCH V4 5/7] monitor: support sub commands in auto comple
From: |
Wenchao Xia |
Subject: |
[Qemu-devel] [PATCH V4 5/7] monitor: support sub commands in auto completion |
Date: |
Fri, 28 Jun 2013 11:39:29 +0800 |
This patch allow auto completion work normal for sub command case,
"info block [DEVICE]" can auto complete now, by re-enter the completion
function. Also, original "info" is treated as a special case, now it is
treated as a sub command group, global variable info_cmds is not used
in any more.
"help" command is still treated as a special case, since it is not a sub
command group but want to auto complete command in root command table.
parse_cmdline() takes another parameter now to tell next valid
parameter's position in original cmdline.
Signed-off-by: Wenchao Xia <address@hidden>
---
monitor.c | 62 +++++++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 42 insertions(+), 20 deletions(-)
diff --git a/monitor.c b/monitor.c
index 7cfda75..5a66fb0 100644
--- a/monitor.c
+++ b/monitor.c
@@ -801,9 +801,24 @@ static int get_str(char *buf, int buf_size, const char
**pp)
#define MAX_ARGS 16
-/* NOTE: this parser is an approximate form of the real command parser */
+/*
+ * Parse the command line to get valid args.
+ * @cmdline: command line to be parsed.
+ * @pnb_args: location to store the number of args, must NOT be NULL.
+ * @args: location to store the args, which should be freed by caller, must
+ * NOT be NULL.
+ * @args_cmdline: location to store char position in @cmdline correspond to
+ * @args include '\0', can be NULL.
+ *
+ * For example, if @cmdline = " ab" and @args_cmdline != NULL, result will be:
+ * pnb_args = 1, args[0] = "ab", args_cmdline[0] = "ab",
+ * args_cmdline[1] = "\0".
+ *
+ * NOTE: this parser is an approximate form of the real command parser. Number
+ * of args have a limit of MAX_ARGS.
+ */
static void parse_cmdline(const char *cmdline,
- int *pnb_args, char **args)
+ int *pnb_args, char **args, const char **args_cmdline)
{
const char *p;
int nb_args, ret;
@@ -811,14 +826,14 @@ static void parse_cmdline(const char *cmdline,
p = cmdline;
nb_args = 0;
- for (;;) {
+ while (nb_args < MAX_ARGS) {
while (qemu_isspace(*p)) {
p++;
}
- if (*p == '\0') {
- break;
+ if (args_cmdline) {
+ args_cmdline[nb_args] = p;
}
- if (nb_args >= MAX_ARGS) {
+ if (*p == '\0') {
break;
}
ret = get_str(buf, sizeof(buf), &p);
@@ -888,7 +903,7 @@ static void help_cmd(Monitor *mon, const char *name)
return;
}
- parse_cmdline(name, &nb_args, args);
+ parse_cmdline(name, &nb_args, args, NULL);
if (nb_args >= MAX_ARGS) {
goto cleanup;
}
@@ -4180,17 +4195,18 @@ static const char *next_arg_type(const char *typestr)
return (p != NULL ? ++p : typestr);
}
-static void monitor_find_completion(Monitor *mon,
- const char *cmdline)
+static void monitor_find_completion_by_table(Monitor *mon,
+ const mon_cmd_t *cmd_table,
+ const char *cmdline)
{
- const char *cmdname;
+ const char *cmdname, *args_cmdline[MAX_ARGS];
char *args[MAX_ARGS];
int nb_args, i, len;
const char *ptype, *str;
const mon_cmd_t *cmd;
MonitorBlockComplete mbs;
- parse_cmdline(cmdline, &nb_args, args);
+ parse_cmdline(cmdline, &nb_args, args, args_cmdline);
#ifdef DEBUG_COMPLETION
for (i = 0; i < nb_args; i++) {
monitor_printf(mon, "arg%d = '%s'\n", i, args[i]);
@@ -4213,12 +4229,12 @@ static void monitor_find_completion(Monitor *mon,
else
cmdname = args[0];
readline_set_completion_index(mon->rs, strlen(cmdname));
- for (cmd = mon->cmd_table; cmd->name != NULL; cmd++) {
+ for (cmd = cmd_table; cmd->name != NULL; cmd++) {
cmd_completion(mon, cmdname, cmd->name);
}
} else {
/* find the command */
- for (cmd = mon->cmd_table; cmd->name != NULL; cmd++) {
+ for (cmd = cmd_table; cmd->name != NULL; cmd++) {
if (compare_cmd(args[0], cmd->name)) {
break;
}
@@ -4227,6 +4243,12 @@ static void monitor_find_completion(Monitor *mon,
goto cleanup;
}
+ if (cmd->sub_table) {
+ monitor_find_completion_by_table(mon, cmd->sub_table,
+ args_cmdline[1]);
+ goto cleanup;
+ }
+
ptype = next_arg_type(cmd->args_type);
for(i = 0; i < nb_args - 2; i++) {
if (*ptype != '\0') {
@@ -4253,13 +4275,7 @@ static void monitor_find_completion(Monitor *mon,
bdrv_iterate(block_completion_it, &mbs);
break;
case 's':
- /* XXX: more generic ? */
- if (!strcmp(cmd->name, "info")) {
- readline_set_completion_index(mon->rs, strlen(str));
- for(cmd = info_cmds; cmd->name != NULL; cmd++) {
- cmd_completion(mon, str, cmd->name);
- }
- } else if (!strcmp(cmd->name, "sendkey")) {
+ if (!strcmp(cmd->name, "sendkey")) {
char *sep = strrchr(str, '-');
if (sep)
str = sep + 1;
@@ -4285,6 +4301,12 @@ cleanup:
}
}
+static void monitor_find_completion(Monitor *mon,
+ const char *cmdline)
+{
+ return monitor_find_completion_by_table(mon, mon->cmd_table, cmdline);
+}
+
static int monitor_can_read(void *opaque)
{
Monitor *mon = opaque;
--
1.7.1
- [Qemu-devel] [PATCH V4 0/7] monitor: support sub command group in auto completion and help, Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 1/7] monitor: avoid direct use of global *cur_mon in completion functions, Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 2/7] monitor: avoid direct use of global variable *mon_cmds, Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 4/7] monitor: avoid direct use of global *info_cmds in help functions, Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 5/7] monitor: support sub commands in auto completion,
Wenchao Xia <=
- [Qemu-devel] [PATCH V4 3/7] monitor: code move for parse_cmdline(), Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 6/7] monitor: improve "help" in auto completion for sub command, Wenchao Xia, 2013/06/27
- [Qemu-devel] [PATCH V4 7/7] monitor: improve "help" to allow show details of single command in sub group, Wenchao Xia, 2013/06/27
- Re: [Qemu-devel] [PATCH V4 0/7] monitor: support sub command group in auto completion and help, Wenchao Xia, 2013/06/28