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getline.h
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getline.h
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/** getline.h
*
* Implementations for POSIX `getdelim` and `getline` functions for non-POSIX
* systems.
*
* Copyright (C) 2020 James D. Lin <[email protected]>
*
* The latest version of this file can be downloaded from:
* <https://github.com/jamesderlin/getline-compatible>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef GETLINE_COMPATIBLE_H
#define GETLINE_COMPATIBLE_H
#include <stdio.h>
#include <limits.h>
#if defined __unix__ \
|| defined __linux__ \
|| (defined __APPLE__ && defined __MACH__) \
|| defined __MINGW32__
/* For `ssize_t`. */
#include <sys/types.h>
#endif
#ifndef SSIZE_MAX
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t) -1)
#endif
#if defined ULLONG_MAX && SIZE_MAX == ULLONG_MAX
typedef long long ssize_t;
#define SSIZE_MAX LLONG_MAX
#elif SIZE_MAX == ULONG_MAX
typedef long ssize_t;
#define SSIZE_MAX LONG_MAX
#elif SIZE_MAX == UINT_MAX
typedef int ssize_t;
#define SSIZE_MAX INT_MAX
#elif SIZE_MAX == USHORT_MAX
typedef short ssize_t;
#define SSIZE_MAX SHORT_MAX
#else
#error `ssize_t` and `SSIZE_MAX` must be defined first.
#endif
#endif
/* If `_WITH_GETLINE` is defined, assume that `getdelim` and `getline` are
* available from `stdio.h` and should be used instead.
*/
#ifndef _WITH_GETLINE
/** getdelim
*
* See: <https://pubs.opengroup.org/onlinepubs/9699919799/functions/getline.html>
*
* Compatibility:
* If `EINVAL` is not available, sets `errno` to `EDOM` instead.
*
* If `EOVERFLOW` is not available, sets `errno` to `ERANGE` instead.
*
* If `ENOMEM` is not available, sets `errno` to `ERANGE` instead.
*/
ssize_t getdelim(char** lineptr, size_t* n, int delimiter, FILE* stream);
/** getline
*
* Equivalent to `getdelim(lineptr, n, '\n', stream)`.
*/
ssize_t getline(char** lineptr, size_t* n, FILE* stream);
#endif /* _WITH_GETLINE */
/** getline_univ
*
* A version of `getline` that recognizes CR, LF, or CR-LF as line
* endings, regardless of the platform and of `stream`'s mode.
*/
ssize_t getline_univ(char** lineptr, size_t* n, FILE* stream);
#endif /* GETLINE_COMPATIBLE_H */