shell: Use struct shell_module instead of integer to refer to modules

It's much more intuitive to read "if (module)" instead of
"if (module != -1)" when checking for a valid module. Update the code
to use struct shell_module pointers instead of integers for tracking
modules.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2017-11-15 13:12:18 +02:00 committed by Johan Hedberg
commit 7318904ae1

View file

@ -41,7 +41,7 @@ extern struct shell_module __shell_cmd_end[];
static const char *prompt;
static char default_module_prompt[PROMPT_MAX_LEN];
static int default_module = -1;
static struct shell_module *default_module;
#define STACKSIZE CONFIG_CONSOLE_SHELL_STACKSIZE
static K_THREAD_STACK_DEFINE(stack, STACKSIZE);
@ -67,11 +67,11 @@ static const char *get_prompt(void)
}
}
if (default_module != -1) {
if (__shell_cmd_start[default_module].prompt) {
if (default_module) {
if (default_module->prompt) {
const char *ret;
ret = __shell_cmd_start[default_module].prompt();
ret = default_module->prompt();
if (ret) {
return ret;
}
@ -135,7 +135,7 @@ static size_t line2argv(char *str, char *argv[], size_t size)
return argc;
}
static int get_destination_module(const char *module_str)
static struct shell_module *get_destination_module(const char *module_str)
{
int i;
@ -143,11 +143,11 @@ static int get_destination_module(const char *module_str)
if (!strncmp(module_str,
__shell_cmd_start[i].module_name,
MODULE_NAME_MAX_LEN)) {
return i;
return &__shell_cmd_start[i];
}
}
return -1;
return NULL;
}
static int show_cmd_help(const struct shell_cmd *cmd, bool full)
@ -161,18 +161,17 @@ static int show_cmd_help(const struct shell_cmd *cmd, bool full)
return 0;
}
static void print_module_commands(const int module)
static void print_module_commands(struct shell_module *module)
{
const struct shell_module *shell_module = &__shell_cmd_start[module];
int i;
printk("help\n");
for (i = 0; shell_module->commands[i].cmd_name; i++) {
for (i = 0; module->commands[i].cmd_name; i++) {
printk("%-28s %s\n",
shell_module->commands[i].cmd_name,
shell_module->commands[i].help ?
shell_module->commands[i].help : "");
module->commands[i].cmd_name,
module->commands[i].help ?
module->commands[i].help : "");
}
}
@ -190,14 +189,15 @@ static const struct shell_cmd *get_cmd(const struct shell_cmd cmds[],
return NULL;
}
static const struct shell_cmd *get_mod_cmd(int module, const char *cmd_str)
static const struct shell_cmd *get_mod_cmd(struct shell_module *module,
const char *cmd_str)
{
return get_cmd(__shell_cmd_start[module].commands, cmd_str);
return get_cmd(module->commands, cmd_str);
}
static int cmd_help(int argc, char *argv[])
{
int module = default_module;
struct shell_module *module = default_module;
/* help per command */
if (argc > 1) {
@ -205,7 +205,7 @@ static int cmd_help(int argc, char *argv[])
const char *cmd_str;
module = get_destination_module(argv[1]);
if (module != -1) {
if (module) {
if (argc == 2) {
goto module_help;
}
@ -218,7 +218,7 @@ static int cmd_help(int argc, char *argv[])
return -EINVAL;
}
if (module == -1) {
if (!module) {
printk("No help found for '%s'\n", cmd_str);
return -EINVAL;
}
@ -234,14 +234,17 @@ static int cmd_help(int argc, char *argv[])
module_help:
/* help per module */
if (module != -1) {
if (module) {
print_module_commands(module);
printk("\nEnter 'exit' to leave current module.\n");
} else { /* help for all entities */
int i;
printk("Available modules:\n");
for (module = 0; module < NUM_OF_SHELL_ENTITIES; module++) {
printk("%s\n", __shell_cmd_start[module].module_name);
for (i = 0; i < NUM_OF_SHELL_ENTITIES; i++) {
printk("%s\n", __shell_cmd_start[i].module_name);
}
printk("\nTo select a module, enter 'select <module name>'.\n");
}
@ -250,7 +253,7 @@ module_help:
static int set_default_module(const char *name)
{
int module;
struct shell_module *module;
if (strlen(name) > MODULE_NAME_MAX_LEN) {
printk("Module name %s is too long, default is not changed\n",
@ -260,7 +263,7 @@ static int set_default_module(const char *name)
module = get_destination_module(name);
if (module == -1) {
if (!module) {
printk("Illegal module %s, default is not changed\n", name);
return -EINVAL;
}
@ -276,7 +279,7 @@ static int set_default_module(const char *name)
static int cmd_select(int argc, char *argv[])
{
if (argc == 1) {
default_module = -1;
default_module = NULL;
return 0;
}
@ -286,7 +289,7 @@ static int cmd_select(int argc, char *argv[])
static int cmd_exit(int argc, char *argv[])
{
if (argc == 1) {
default_module = -1;
default_module = NULL;
}
return 0;
@ -320,20 +323,20 @@ int shell_exec(char *line)
goto done;
}
if (argc == 1 && default_module == -1) {
if (argc == 1 && !default_module) {
printk("No module selected. Use 'select' or 'help'.\n");
return -EINVAL;
}
if (default_module != -1) {
if (default_module) {
cmd = get_mod_cmd(default_module, argv[0]);
}
if (!cmd && argc > 1) {
int module;
struct shell_module *module;
module = get_destination_module(argv[0]);
if (module != -1) {
if (module) {
cmd = get_mod_cmd(module, argv[1]);
if (cmd) {
argc--;
@ -380,10 +383,11 @@ static void shell(void *p1, void *p2, void *p3)
}
}
static int get_command_to_complete(char *str, char **command_prefix)
static struct shell_module *get_completion_module(char *str,
char **command_prefix)
{
char dest_str[MODULE_NAME_MAX_LEN];
int dest = -1;
struct shell_module *dest;
char *start;
/* remove ' ' at the beginning of the line */
@ -392,15 +396,17 @@ static int get_command_to_complete(char *str, char **command_prefix)
}
if (!*str) {
return -1;
return NULL;
}
start = str;
if (default_module != -1) {
if (default_module) {
dest = default_module;
/* caller function already checks str len and put '\0' */
*command_prefix = str;
} else {
dest = NULL;
}
/*
@ -408,23 +414,23 @@ static int get_command_to_complete(char *str, char **command_prefix)
* Otherwise, only two parameters are possibles.
*/
str = strchr(str, ' ');
if (default_module != -1) {
return (str == NULL) ? dest : -1;
if (default_module) {
return str ? dest : NULL;
}
if (str == NULL) {
return -1;
if (!str) {
return NULL;
}
if ((str - start + 1) >= MODULE_NAME_MAX_LEN) {
return -1;
return NULL;
}
strncpy(dest_str, start, (str - start + 1));
dest_str[str - start] = '\0';
dest = get_destination_module(dest_str);
if (dest == -1) {
return -1;
if (!dest) {
return NULL;
}
str++;
@ -434,14 +440,14 @@ static int get_command_to_complete(char *str, char **command_prefix)
str = strchr(str, ' ');
/* only two parameters are possibles in case of no default module */
return (str == NULL) ? dest : -1;
return str ? dest : NULL;
}
static u8_t completion(char *line, u8_t len)
{
const char *first_match = NULL;
int common_chars = -1, space = 0;
int i, dest, command_len;
int i, command_len;
const struct shell_module *module;
char *command_prefix;
@ -454,20 +460,18 @@ static u8_t completion(char *line, u8_t len)
* k_fifo_get function
*/
line[len] = '\0';
dest = get_command_to_complete(line, &command_prefix);
if (dest == -1) {
module = get_completion_module(line, &command_prefix);
if (!module) {
return 0;
}
command_len = strlen(command_prefix);
module = &__shell_cmd_start[dest];
for (i = 0; module->commands[i].cmd_name; i++) {
int j;
if (strncmp(command_prefix,
module->commands[i].cmd_name, command_len)) {
module->commands[i].cmd_name, command_len)) {
continue;
}
@ -562,9 +566,9 @@ void shell_register_prompt_handler(shell_prompt_function_t handler)
void shell_register_default_module(const char *name)
{
int result = set_default_module(name);
int err = set_default_module(name);
if (result != -1) {
if (!err) {
printk("\n%s", default_module_prompt);
}
}