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/***************************************************************************************************
Zyan Core Library (Zycore-C)
Original Author : Joel Hoener
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
/**
* @file
* Implements command-line argument parsing.
*/
#ifndef ZYCORE_ARGPARSE_H
#define ZYCORE_ARGPARSE_H
#include "zydis/Zycore/Types.h"
#include "zydis/Zycore/Status.h"
#include "zydis/Zycore/Vector.h"
#include "zydis/Zycore/String.h"
#ifdef __cplusplus
extern "C" {
#endif
/* ============================================================================================== */
/* Structs and other types */
/* ============================================================================================== */
/**
* Definition of a single argument.
*/
typedef struct ZyanArgParseDefinition_
{
/**
* The argument name, e.g. `--help`.
*
* Must start with either one or two dashes. Single dash arguments must consist of a single
* character, (e.g. `-n`), double-dash arguments can be of arbitrary length.
*/
const char* name;
/**
* Whether the argument is boolean or expects a value.
*/
ZyanBool boolean;
/**
* Whether this argument is required (error if missing).
*/
ZyanBool required;
} ZyanArgParseDefinition;
/**
* Configuration for argument parsing.
*/
typedef struct ZyanArgParseConfig_
{
/**
* `argv` argument passed to `main` by LibC.
*/
const char** argv;
/**
* `argc` argument passed to `main` by LibC.
*/
ZyanUSize argc;
/**
* Minimum # of accepted unnamed / anonymous arguments.
*/
ZyanUSize min_unnamed_args;
/**
* Maximum # of accepted unnamed / anonymous arguments.
*/
ZyanUSize max_unnamed_args;
/**
* Argument definition array, or `ZYAN_NULL`.
*
* Expects a pointer to an array of `ZyanArgParseDefinition` instances. The array is
* terminated by setting the `.name` field of the last element to `ZYAN_NULL`. If no named
* arguments should be parsed, you can also set this to `ZYAN_NULL`.
*/
ZyanArgParseDefinition* args;
} ZyanArgParseConfig;
/**
* Information about a parsed argument.
*/
typedef struct ZyanArgParseArg_
{
/**
* Corresponding argument definition, or `ZYAN_NULL` for unnamed args.
*
* This pointer is borrowed from the `cfg` pointer passed to `ZyanArgParse`.
*/
const ZyanArgParseDefinition* def;
/**
* Whether the argument has a value (is non-boolean).
*/
ZyanBool has_value;
/**
* If `has_value == true`, then the argument value.
*
* This is a view into the `argv` string array passed to `ZyanArgParse` via the `cfg` argument.
*/
ZyanStringView value;
} ZyanArgParseArg;
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
#ifndef ZYAN_NO_LIBC
/**
* Parse arguments according to a `ZyanArgParseConfig` definition.
*
* @param cfg Argument parser config to use.
* @param parsed Receives the parsed output. Vector of `ZyanArgParseArg`. Ownership is
* transferred to the user. Input is expected to be uninitialized. On error,
* the vector remains uninitialized.
* @param error_token On error, if it makes sense, receives the argument fragment causing the
* error. Optional, may be `ZYAN_NULL`. The pointer borrows into the `cfg`
* struct and doesn't have to be freed by the user.
*
* @return A `ZyanStatus` status determining whether the parsing succeeded.
*/
ZYCORE_EXPORT ZyanStatus ZyanArgParse(const ZyanArgParseConfig *cfg, ZyanVector* parsed,
const char** error_token);
#endif
/**
* Parse arguments according to a `ZyanArgParseConfig` definition.
*
* This version allows specification of a custom memory allocator and thus supports no-libc.
*
* @param cfg Argument parser config to use.
* @param parsed Receives the parsed output. Vector of `ZyanArgParseArg`. Ownership is
* transferred to the user. Input is expected to be uninitialized. On error,
* the vector remains uninitialized.
* @param error_token On error, if it makes sense, receives the argument fragment causing the
* error. Optional, may be `ZYAN_NULL`. The pointer borrows into the `cfg`
* struct and doesn't have to be freed by the user.
* @param allocator The `ZyanAllocator` to be used for allocating the output vector's data.
*
* @return A `ZyanStatus` status determining whether the parsing succeeded.
*/
ZYCORE_EXPORT ZyanStatus ZyanArgParseEx(const ZyanArgParseConfig *cfg, ZyanVector* parsed,
const char** error_token, ZyanAllocator* allocator);
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif /* ZYCORE_ARGPARSE_H */
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