cmd: add support for long commands

- Long commands are commands that is 2 or more characters,
  and MUST be completed by pressing enter.

- A given command can have a long-command, a short-command
  or both.

- All long commands are using '/' (slash) prefix

- a simple TAB-completion is supported, while punching in
  your long command you can press TAB to see a list of
  commands that matches the input string.

Feedback is welcome, specially on the long-command strings
itself. If you want to suggest changes, please make a small
and non-intrusive patch and send it as a Pull Request (PR).

1 files changed, 69 insertions, 1 deletions

diff --git a/test/cmd.c b/test/cmd.c
index 92325b7..f4c738c 100644
--- a/test/cmd.c
+++ b/test/cmd.c
@@ -32,7 +32,7 @@ static int cmd_test(struct re_printf *pf, void *arg)
 
 
 static const struct cmd cmdv[] = {
-	{'@',       0, "Test command",  cmd_test},
+	{NULL, '@', 0, "Test command",  cmd_test},
 };
 
 
@@ -77,3 +77,71 @@ int test_cmd(void)
  out:
 	return err;
 }
+
+
+static int long_handler(struct re_printf *pf, void *arg)
+{
+	struct cmd_arg *carg = arg;
+	struct test *test = carg->data;
+	int err = 0;
+	(void)pf;
+
+	ASSERT_STREQ("123", carg->prm);
+
+	++test->cmd_called;
+
+ out:
+	return err;
+}
+
+
+static const struct cmd longcmdv[] = {
+	{ "test", 0, 0, "Test Command", long_handler},
+};
+
+
+int test_cmd_long(void)
+{
+	struct test test;
+	const struct cmd *cmd;
+	static const char *input_str = "/test 123\n";
+	struct cmd_ctx *ctx = NULL;
+	size_t i;
+	int err;
+
+	memset(&test, 0, sizeof(test));
+
+	/* Verify that the command does not exist */
+	cmd = cmd_find_long("test");
+	ASSERT_TRUE(cmd == NULL);
+
+	/* Register and verify command */
+	err = cmd_register(longcmdv, ARRAY_SIZE(longcmdv));
+	ASSERT_EQ(0, err);
+
+	cmd = cmd_find_long("test");
+	ASSERT_TRUE(cmd != NULL);
+
+	/* Feed it some input data .. */
+
+	for (i=0; i<strlen(input_str); i++) {
+
+		err = cmd_process(&ctx, input_str[i], &pf_null, &test);
+		ASSERT_EQ(0, err);
+	}
+
+	err = cmd_process_long("test 123", 8, &pf_null, &test);
+	ASSERT_EQ(0, err);
+
+	ASSERT_EQ(2, test.cmd_called);
+
+	/* Cleanup .. */
+
+	cmd_unregister(longcmdv);
+
+	cmd = cmd_find_long("test");
+	ASSERT_TRUE(cmd == NULL);
+
+ out:
+	return err;
+}