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MXS-929: Add descriptions to module command arguments

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Each argument now has a description describing what it does and what it's
used for.
This commit is contained in:
Markus Makela
2016-11-21 12:54:56 +02:00
parent 4137d58dd5
commit 3b5b616edf
3 changed files with 168 additions and 40 deletions
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69
include/maxscale/modulecmd.h
View File

@ -35,26 +35,37 @@ MXS_BEGIN_DECLS
/**
* The argument type
*
* First 8 bits are reserved for argument type, bits 9 through 32 are reserved
* for argument options and bits 33 through 64 are reserved for future use.
* First 8 bits of @c value are reserved for argument type, bits 9 through
* 32 are reserved for argument options and bits 33 through 64 are reserved
* for future use.
*
* @c description should be a human-readable description of the argument.
*/
typedef uint64_t modulecmd_arg_type_t;
typedef struct
{
uint64_t type; /**< The argument type */
const char *description; /**< The argument description */
} modulecmd_arg_type_t;
/**
* Argument types for the registered functions, the first 8 bits of
* the modulecmd_arg_type_t type. An argument can be of only one type.
* the modulecmd_arg_type_t type's @c value member. An argument can be of
* only one type.
*/
#define MODULECMD_ARG_NONE 0
#define MODULECMD_ARG_STRING 1
#define MODULECMD_ARG_BOOLEAN 2
#define MODULECMD_ARG_SERVICE 3
#define MODULECMD_ARG_SERVER 4
#define MODULECMD_ARG_SESSION 5
#define MODULECMD_ARG_SESSION_PTR 6
#define MODULECMD_ARG_DCB 7
#define MODULECMD_ARG_DCB_PTR 8
#define MODULECMD_ARG_MONITOR 9
#define MODULECMD_ARG_FILTER 10
#define MODULECMD_ARG_NONE 0 /**< Empty argument */
#define MODULECMD_ARG_STRING 1 /**< String */
#define MODULECMD_ARG_BOOLEAN 2 /**< Boolean value */
#define MODULECMD_ARG_SERVICE 3 /**< Service name */
#define MODULECMD_ARG_SERVER 4 /**< Server name */
#define MODULECMD_ARG_SESSION 5 /**< SESSION pointer in string format */
#define MODULECMD_ARG_SESSION_PTR 6 /**< Raw SESSION pointer */
#define MODULECMD_ARG_DCB 7 /**< DCB pointer in string format*/
#define MODULECMD_ARG_DCB_PTR 8 /**< Raw DCB pointer*/
#define MODULECMD_ARG_MONITOR 9 /**< Monitor name */
#define MODULECMD_ARG_FILTER 10 /**< Filter name */
#define MODULECMD_ARG_OUTPUT 11 /**< DCB suitable for writing results to.
This should always be the first argument
if the function requires an output DCB. */
/**
* Options for arguments, bits 9 through 32
@ -64,8 +75,9 @@ typedef uint64_t modulecmd_arg_type_t;
/**
* Helper macros
*/
#define MODULECMD_GET_TYPE(type) ((type & 0xff))
#define MODULECMD_ARG_IS_REQUIRED(type) ((type & MODULECMD_ARG_OPTIONAL) == 0)
#define MODULECMD_GET_TYPE(t) ((t)->type & 0xff)
#define MODULECMD_ARG_IS_REQUIRED(t) (((t)->type & MODULECMD_ARG_OPTIONAL) == 0)
#define MODULECMD_ARG_PRESENT(t) (MODULECMD_GET_TYPE(t) != MODULECMD_ARG_NONE)
/** Argument list node */
struct arg_node
@ -158,6 +170,18 @@ MODULECMD_ARG* modulecmd_arg_parse(const MODULECMD *cmd, int argc, const void **
*/
void modulecmd_arg_free(MODULECMD_ARG *arg);
/**
* @brief Check if an optional argument was defined
*
* This function looks the argument list @c arg at an offset of @c idx and
* checks if the argument list contains a value for an optional argument.
*
* @param arg Argument list
* @param idx Index of the argument, starts at 0
* @return True if the optional argument is present
*/
bool modulecmd_arg_is_present(const MODULECMD_ARG *arg, int idx);
/**
* @brief Call a registered command
*
@ -216,4 +240,15 @@ const char* modulecmd_get_error();
bool modulecmd_foreach(const char *domain_re, const char *ident_re,
bool(*fn)(const MODULECMD *cmd, void *data), void *data);
/**
* @brief Return argument type as string
*
* This returns the string type of @c type. The returned string must be freed
* by the called.
*
* @param type Type to convert
* @return New string or NULL on memory allocation error
*/
char* modulecmd_argtype_to_str(modulecmd_arg_type_t *type);
MXS_END_DECLS

119
server/core/modulecmd.c
View File

@ -147,7 +147,7 @@ static MODULECMD* command_create(const char *identifier, const char *domain,
for (int i = 0; i < argc; i++)
{
if (MODULECMD_ARG_IS_REQUIRED(argv[i]))
if (MODULECMD_ARG_IS_REQUIRED(&argv[i]))
{
argc_min++;
}
@ -197,14 +197,14 @@ static bool domain_has_command(MODULECMD_DOMAIN *dm, const char *id)
return false;
}
static bool process_argument(modulecmd_arg_type_t type, const void* value,
static bool process_argument(modulecmd_arg_type_t *type, const void* value,
struct arg_node *arg, const char **err)
{
bool rval = false;
if (!MODULECMD_ARG_IS_REQUIRED(type) && value == NULL)
{
arg->type = MODULECMD_ARG_NONE;
arg->type.type = MODULECMD_ARG_NONE;
rval = true;
}
else if (value)
@ -212,14 +212,14 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
switch (MODULECMD_GET_TYPE(type))
{
case MODULECMD_ARG_NONE:
arg->type = MODULECMD_ARG_NONE;
arg->type.type = MODULECMD_ARG_NONE;
rval = true;
break;
case MODULECMD_ARG_STRING:
if ((arg->value.string = MXS_STRDUP((char*)value)))
{
arg->type = MODULECMD_ARG_STRING;
arg->type.type = MODULECMD_ARG_STRING;
rval = true;
}
else
@ -234,7 +234,7 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
if (truthval != -1)
{
arg->value.boolean = truthval;
arg->type = MODULECMD_ARG_BOOLEAN;
arg->type.type = MODULECMD_ARG_BOOLEAN;
rval = true;
}
else
@ -247,7 +247,7 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
case MODULECMD_ARG_SERVICE:
if ((arg->value.service = service_find((char*)value)))
{
arg->type = MODULECMD_ARG_SERVICE;
arg->type.type = MODULECMD_ARG_SERVICE;
rval = true;
}
else
@ -259,7 +259,7 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
case MODULECMD_ARG_SERVER:
if ((arg->value.server = server_find_by_unique_name((char*)value)))
{
arg->type = MODULECMD_ARG_SERVER;
arg->type.type = MODULECMD_ARG_SERVER;
rval = true;
}
else
@ -269,25 +269,25 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
break;
case MODULECMD_ARG_SESSION:
arg->type = MODULECMD_ARG_SESSION;
arg->type.type = MODULECMD_ARG_SESSION;
arg->value.session = (SESSION*)strtol((char*)value, NULL, 0);
rval = true;
break;
case MODULECMD_ARG_SESSION_PTR:
arg->type = MODULECMD_ARG_SESSION_PTR;
arg->type.type = MODULECMD_ARG_SESSION_PTR;
arg->value.session = (SESSION*)value;
rval = true;
break;
case MODULECMD_ARG_DCB:
arg->type = MODULECMD_ARG_DCB;
arg->type.type = MODULECMD_ARG_DCB;
arg->value.dcb = (DCB*)strtol((char*)value, NULL, 0);
rval = true;
break;
case MODULECMD_ARG_DCB_PTR:
arg->type = MODULECMD_ARG_DCB_PTR;
arg->type.type = MODULECMD_ARG_DCB_PTR;
arg->value.dcb = (DCB*)value;
rval = true;
break;
@ -295,7 +295,7 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
case MODULECMD_ARG_MONITOR:
if ((arg->value.monitor = monitor_find((char*)value)))
{
arg->type = MODULECMD_ARG_MONITOR;
arg->type.type = MODULECMD_ARG_MONITOR;
rval = true;
}
else
@ -307,7 +307,7 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
case MODULECMD_ARG_FILTER:
if ((arg->value.filter = filter_find((char*)value)))
{
arg->type = MODULECMD_ARG_FILTER;
arg->type.type = MODULECMD_ARG_FILTER;
rval = true;
}
else
@ -316,9 +316,15 @@ static bool process_argument(modulecmd_arg_type_t type, const void* value,
}
break;
case MODULECMD_ARG_OUTPUT:
arg->type.type = MODULECMD_ARG_OUTPUT;
arg->value.dcb = (DCB*)value;
rval = true;
break;
default:
ss_dassert(false);
MXS_ERROR("Undefined argument type: %0lx", type);
MXS_ERROR("Undefined argument type: %0lx", type->type);
*err = "internal error";
break;
}
@ -353,7 +359,7 @@ static MODULECMD_ARG* modulecmd_arg_create(int argc)
static void free_argument(struct arg_node *arg)
{
switch (arg->type)
switch (arg->type.type)
{
case MODULECMD_ARG_STRING:
MXS_FREE(arg->value.string);
@ -451,7 +457,7 @@ MODULECMD_ARG* modulecmd_arg_parse(const MODULECMD *cmd, int argc, const void **
{
const char *err = "";
if (!process_argument(cmd->arg_types[i], argv[i], &arg->argv[i], &err))
if (!process_argument(&cmd->arg_types[i], argv[i], &arg->argv[i], &err))
{
error = true;
modulecmd_set_error("Argument %d, %s: %s", i + 1, err, argv[i] ? argv[i] : "No argument given");
@ -580,3 +586,82 @@ bool modulecmd_foreach(const char *domain_re, const char *ident_re,
spinlock_release(&modulecmd_lock);
return rval;
}
char* modulecmd_argtype_to_str(modulecmd_arg_type_t *type)
{
const char *strtype = "UNKNOWN";
switch (MODULECMD_GET_TYPE(type))
{
case MODULECMD_ARG_NONE:
strtype = "NONE";
break;
case MODULECMD_ARG_STRING:
strtype = "STRING";
break;
case MODULECMD_ARG_BOOLEAN:
strtype = "BOOLEAN";
break;
case MODULECMD_ARG_SERVICE:
strtype = "SERVICE";
break;
case MODULECMD_ARG_SERVER:
strtype = "SERVER";
break;
case MODULECMD_ARG_SESSION:
strtype = "SESSION";
break;
case MODULECMD_ARG_SESSION_PTR:
strtype = "SESSION_PTR";
break;
case MODULECMD_ARG_DCB:
strtype = "DCB";
break;
case MODULECMD_ARG_DCB_PTR:
strtype = "DCB_PTR";
break;
case MODULECMD_ARG_MONITOR:
strtype = "MONITOR";
break;
case MODULECMD_ARG_FILTER:
strtype = "FILTER";
break;
case MODULECMD_ARG_OUTPUT:
strtype = "OUTPUT";
break;
default:
ss_dassert(false);
MXS_ERROR("Unknown type");
break;
}
size_t slen = strlen(strtype);
size_t extra = MODULECMD_ARG_IS_REQUIRED(type) ? 0 : 2;
char *rval = MXS_MALLOC(slen + extra + 1);
if (rval)
{
const char *fmtstr = extra ? "[%s]" : "%s";
sprintf(rval, fmtstr, strtype);
}
return rval;
}
bool modulecmd_arg_is_present(const MODULECMD_ARG *arg, int idx)
{
return arg->argc > idx &&
MODULECMD_GET_TYPE(&arg->argv[idx].type) != MODULECMD_ARG_NONE;
}

18
server/core/test/testmodulecmd.c
View File

@ -47,7 +47,11 @@ int test_arguments()
const char *ns = "test_arguments";
const char *id = "test_arguments";
modulecmd_arg_type_t args1[] = {MODULECMD_ARG_STRING, MODULECMD_ARG_BOOLEAN};
modulecmd_arg_type_t args1[] =
{
{MODULECMD_ARG_STRING, ""},
{MODULECMD_ARG_BOOLEAN, ""}
};
TEST(strlen(modulecmd_get_error()) == 0, "Error message should be empty");
@ -150,8 +154,8 @@ int test_optional_arguments()
const void *id = "test_optional_arguments";
modulecmd_arg_type_t args1[] =
{
MODULECMD_ARG_STRING | MODULECMD_ARG_OPTIONAL,
MODULECMD_ARG_BOOLEAN | MODULECMD_ARG_OPTIONAL
{MODULECMD_ARG_STRING | MODULECMD_ARG_OPTIONAL, ""},
{MODULECMD_ARG_BOOLEAN | MODULECMD_ARG_OPTIONAL, ""}
};
TEST(modulecmd_register_command(ns, id, test_fn2, 2, args1),
@ -323,8 +327,12 @@ int test_pointers()
const char *ns = "test_pointers";
const char *id = "test_pointers";
modulecmd_arg_type_t args[] = {MODULECMD_ARG_DCB, MODULECMD_ARG_DCB_PTR,
MODULECMD_ARG_SESSION, MODULECMD_ARG_SESSION_PTR
modulecmd_arg_type_t args[] =
{
{MODULECMD_ARG_DCB, ""},
{MODULECMD_ARG_DCB_PTR, ""},
{MODULECMD_ARG_SESSION, ""},
{MODULECMD_ARG_SESSION_PTR, ""}
};
TEST(modulecmd_register_command(ns, id, ptrfn, 4, args), "Registering a command should succeed");