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#include <stdio.h>
#include <string.h>
/*
* List command groups.
*/
#define GROUPS \
G(UNKNOWN, "unknown") \
G(SET, "set") \
G(LIST, "list") \
G(HASH, "hash") \
G(GENERIC, "generic") \
G(PUBSUB, "pubsub") \
G(STRING, "string") \
G(SERVER, "server") \
G(CONNECTION, "connection") \
G(TRANSACTIONS, "transactions") \
G(SORTED_SET, "sorted_set")
/*
* Command group types.
*/
typedef enum {
#define G(GROUP, _) COMMAND_GROUP_##GROUP,
GROUPS
#undef G
COMMAND_GROUP_LENGTH
} command_group_type_t;
/*
* Command group type names.
*/
static char *command_group_type_names[] = {
#define G(_, STR) STR,
GROUPS
#undef G
};
/*
* Command help struct.
*/
struct command_help {
char *name;
char *params;
char *summary;
command_group_type_t group;
char *since;
} command_help[] = {
__COMMANDS__
};
/*
* Output command help to stdout.
*/
static void
output_command_help(struct command_help *help) {
printf("\n \x1b[1m%s\x1b[0m \x1b[90m%s\x1b[0m\n", help->name, help->params);
printf(" \x1b[33msummary:\x1b[0m %s\n", help->summary);
printf(" \x1b[33msince:\x1b[0m %s\n", help->since);
printf(" \x1b[33mgroup:\x1b[0m %s\n", command_group_type_names[help->group]);
}
/*
* Return command group type by name string.
*/
static command_group_type_t
command_group_type_by_name(const char *name) {
for (int i = 0; i < COMMAND_GROUP_LENGTH; ++i) {
const char *group = command_group_type_names[i];
if (0 == strcasecmp(name, group)) return i;
}
return 0;
}
/*
* Output group names.
*/
static void
output_group_help() {
for (int i = 0; i < COMMAND_GROUP_LENGTH; ++i) {
if (COMMAND_GROUP_UNKNOWN == i) continue;
const char *group = command_group_type_names[i];
printf(" \x1b[90m-\x1b[0m %s\n", group);
}
}
/*
* Output all command help, filtering by group or command name.
*/
static void
output_help(int argc, const char **argv) {
int len = sizeof(command_help) / sizeof(struct command_help);
if (argc && 0 == strcasecmp("groups", argv[0])) {
output_group_help();
return;
}
command_group_type_t group = argc
? command_group_type_by_name(argv[0])
: COMMAND_GROUP_UNKNOWN;
for (int i = 0; i < len; ++i) {
struct command_help help = command_help[i];
if (argc && !group && 0 != strcasecmp(help.name, argv[0])) continue;
if (group && group != help.group) continue;
output_command_help(&help);
}
puts("");
}
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