rte_argparse.h File Reference

#include <stdbool.h>
#include <stdint.h>
#include <rte_bitops.h>
#include <rte_compat.h>

Go to the source code of this file.

Data Structures
struct	rte_argparse_arg
struct	rte_argparse

Macros
#define	RTE_ARGPARSE_HAS_VAL_BITMASK   RTE_GENMASK64(1, 0)
#define	RTE_ARGPARSE_VAL_TYPE_BITMASK   RTE_GENMASK64(9, 2)
Flag definition (in bitmask form) for an argument
Note Bits[0~1] represent the argument whether has value, bits[2~9] represent the value type which used when autosave. See also struct rte_argparse_arg::flags
#define	RTE_ARGPARSE_ARG_NO_VALUE   RTE_SHIFT_VAL64(1, 0)
#define	RTE_ARGPARSE_ARG_REQUIRED_VALUE   RTE_SHIFT_VAL64(2, 0)
#define	RTE_ARGPARSE_ARG_OPTIONAL_VALUE   RTE_SHIFT_VAL64(3, 0)
#define	RTE_ARGPARSE_ARG_VALUE_INT   RTE_SHIFT_VAL64(1, 2)
#define	RTE_ARGPARSE_ARG_VALUE_U8   RTE_SHIFT_VAL64(2, 2)
#define	RTE_ARGPARSE_ARG_VALUE_U16   RTE_SHIFT_VAL64(3, 2)
#define	RTE_ARGPARSE_ARG_VALUE_U32   RTE_SHIFT_VAL64(4, 2)
#define	RTE_ARGPARSE_ARG_VALUE_U64   RTE_SHIFT_VAL64(5, 2)
#define	RTE_ARGPARSE_ARG_VALUE_MAX   RTE_SHIFT_VAL64(6, 2)
#define	RTE_ARGPARSE_ARG_SUPPORT_MULTI   RTE_BIT64(10)
#define	RTE_ARGPARSE_ARG_RESERVED_FIELD   RTE_GENMASK64(63, 48)

Typedefs
typedef int(*	rte_arg_parser_t) (uint32_t index, const char *value, void *opaque)

Functions
__rte_experimental int	rte_argparse_parse (struct rte_argparse *obj, int argc, char **argv)
__rte_experimental int	rte_argparse_parse_type (const char *str, uint64_t val_type, void *val)

Detailed Description

Argument parsing API.

The argument parsing API makes it easy to write user-friendly command-line program. The program defines what arguments it requires, and the API will parse those arguments from [argc, argv].

The API provides the following functions: 1) Support parsing optional argument (which could take with no-value, required-value and optional-value. 2) Support parsing positional argument (which must take with required-value). 3) Support automatic generate usage information. 4) Support issue errors when provided with invalid arguments.

There are two ways to parse arguments: 1) AutoSave: for which known value types, the way can be used. 2) Callback: will invoke user callback to parse.

Definition in file rte_argparse.h.

Macro Definition Documentation

RTE_ARGPARSE_ARG_NO_VALUE

#define RTE_ARGPARSE_ARG_NO_VALUE   RTE_SHIFT_VAL64(1, 0)

The argument has no value.

Examples:

examples/dma/dmafwd.c.

Definition at line 48 of file rte_argparse.h.

RTE_ARGPARSE_ARG_REQUIRED_VALUE

#define RTE_ARGPARSE_ARG_REQUIRED_VALUE   RTE_SHIFT_VAL64(2, 0)

The argument must have a value.

Examples:

examples/dma/dmafwd.c.

Definition at line 50 of file rte_argparse.h.

RTE_ARGPARSE_ARG_OPTIONAL_VALUE

#define RTE_ARGPARSE_ARG_OPTIONAL_VALUE   RTE_SHIFT_VAL64(3, 0)

The argument has optional value.

Definition at line 52 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_INT

#define RTE_ARGPARSE_ARG_VALUE_INT   RTE_SHIFT_VAL64(1, 2)

The argument's value is int type.

Examples:

examples/dma/dmafwd.c.

Definition at line 54 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_U8

#define RTE_ARGPARSE_ARG_VALUE_U8   RTE_SHIFT_VAL64(2, 2)

The argument's value is uint8 type.

Definition at line 56 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_U16

#define RTE_ARGPARSE_ARG_VALUE_U16   RTE_SHIFT_VAL64(3, 2)

The argument's value is uint16 type.

Examples:

examples/dma/dmafwd.c.

Definition at line 58 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_U32

#define RTE_ARGPARSE_ARG_VALUE_U32   RTE_SHIFT_VAL64(4, 2)

The argument's value is uint32 type.

Examples:

examples/dma/dmafwd.c.

Definition at line 60 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_U64

#define RTE_ARGPARSE_ARG_VALUE_U64   RTE_SHIFT_VAL64(5, 2)

The argument's value is uint64 type.

Definition at line 62 of file rte_argparse.h.

RTE_ARGPARSE_ARG_VALUE_MAX

#define RTE_ARGPARSE_ARG_VALUE_MAX   RTE_SHIFT_VAL64(6, 2)

Max value type.

Definition at line 64 of file rte_argparse.h.

RTE_ARGPARSE_ARG_SUPPORT_MULTI

#define RTE_ARGPARSE_ARG_SUPPORT_MULTI   RTE_BIT64(10)

Flag for that argument support occur multiple times. This flag can be set only when the argument is optional. When this flag is set, the callback type must be used for parsing.

Definition at line 70 of file rte_argparse.h.

RTE_ARGPARSE_ARG_RESERVED_FIELD

#define RTE_ARGPARSE_ARG_RESERVED_FIELD   RTE_GENMASK64(63, 48)

Reserved for this library implementation usage.

Definition at line 72 of file rte_argparse.h.

RTE_ARGPARSE_HAS_VAL_BITMASK

#define RTE_ARGPARSE_HAS_VAL_BITMASK   RTE_GENMASK64(1, 0)

Bitmask used to get the argument whether has value.

Definition at line 76 of file rte_argparse.h.

RTE_ARGPARSE_VAL_TYPE_BITMASK

#define RTE_ARGPARSE_VAL_TYPE_BITMASK   RTE_GENMASK64(9, 2)

Bitmask used to get the argument's value type.

Definition at line 78 of file rte_argparse.h.

Typedef Documentation

rte_arg_parser_t

typedef int(* rte_arg_parser_t) (uint32_t index, const char *value, void *opaque)

Callback prototype used by parsing specified arguments.

Parameters

index	The argument's index, coming from argument's val_set field.
value	The value corresponding to the argument, it may be NULL (e.g. the argument has no value, or the argument has optional value but doesn't provided value).
opaque	An opaque pointer coming from the caller.

Returns

0 on success. Otherwise negative value is returned.

Definition at line 140 of file rte_argparse.h.

Function Documentation

rte_argparse_parse()

__rte_experimental int rte_argparse_parse	(	struct rte_argparse *	obj,
		int	argc,
		char **	argv
	)

Warning

EXPERIMENTAL: this API may change without prior notice.

Parse parameters.

Parameters

obj	Parser object.
argc	Parameters count.
argv	Array of parameters points.

Returns

0 on success. Otherwise negative value is returned.

Examples:

examples/dma/dmafwd.c.

rte_argparse_parse_type()

__rte_experimental int rte_argparse_parse_type	(	const char *	str,
		uint64_t	val_type,
		void *	val
	)

Warning

EXPERIMENTAL: this API may change without prior notice.

Parse the value from the input string based on the value type.

Parameters

str	Input string.
val_type	The value type,

See also

RTE_ARGPARSE_ARG_VALUE_INT or other type.

Parameters

val	Saver for the value.

Returns

0 on success. Otherwise negative value is returned.