/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _SLIBC_HUMAN_H
#define _SLIBC_HUMAN_H
#include <slibc/version.h>
#include <slibc/features.h>
#ifndef __PORTABLE
#define __NEED_mode_t
#ifdef __C99__
# define __NEED_intmax_t
# define __NEED_uintmax_t
#endif
#include <bits/types.h>
/**
* Representation settings for file permissions.
*/
enum humanmode_mode
{
/**
* Return in the format where 0750
* resolves to 'rwxr-x---'.
*
* If used in combination with `HUMANMODE_MASK`,
* 0750 resolves to 'u=rwx,g=r-x,o=---'.
*/
HUMANMODE_STAT = 1,
/**
* Return in the format where 0750
* resolves to 'u=rwx,g=rx,o='.
*
* If used in combination with `HUMANMODE_STAT`,
* 0750 resolves to 'u=rwx,g=r-x,o=---'.
*/
HUMANMODE_MASK = 2,
};
/**
* Representation settings for converting
* sizes to human-readable format.
*/
enum humansize_mode
{
/**
* 'k' is 1000.
*
* Cannot be combined with `HUMANSIZE_IEC`
* or `HUMANSIZE_IEC_EXPLICIT`.
*/
HUMANSIZE_SI = 1,
/**
* 'K' is 1024.
*
* Cannot be combined with `HUMANSIZE_SI`
* or `HUMANSIZE_IEC_EXPLICIT`.
*/
HUMANSIZE_IEC = 2,
/**
* 'Ki' is 1024.
*
* Cannot be combined with `HUMANSIZE_SI`
* or `HUMANSIZE_IEC`.
*/
HUMANSIZE_IEC_EXPLICIT = 4,
/**
* 'B' is only included if there is no prefix.
*/
HUMANSIZE_PREFIX_ONLY = 8,
/**
* Print size exactly if `detail` is 0,
* otherwise use the highest `detail` prefixes.
*
* For example `detail == 0` may yeild '3TB 2MB 1KB',
* and `detail == 3` may yeild '3TB 2MB' for the same size.
*
* Cannot be combined with `HUMANSIZE_ROUND`.
*/
HUMANSIZE_EXACT = 16,
/**
* Similar to `HUMANSIZE_EXACT` with `detail == 1`,
* but the value will include `detail` digits.
* `detail` < 0 is allowed,
*
* Cannot be combined with `HUMANSIZE_EXACT`.
*/
HUMANSIZE_ROUND = 32,
};
/**
* Settings for treating ambiguous file size
* and file offset representations when parsing.
*/
enum machinesize_mode
{
/**
* 'k' and 'K' is 1000.
*
* If `MACHINESIZE_IEC` is also used,
* 1000-base is used if 'B' is explicitly
* included, otherwise 1024-base is used.
*/
MACHINESIZE_SI = 1,
/**
* 'k' and 'K' is 1024.
*
* If `MACHINESIZE_SI` is also used,
* 1000-base is used if 'B' is explicitly
* included, otherwise 1024-base is used.
*/
MACHINESIZE_IEC = 2,
};
/**
* Ways to handled unrecognised escapes,
* and other configurations.
*/
enum unescape_mode
{
/**
* For any unrecognised character '#',
* '\#' results in an EINVAL-error.
*
* Cannot be used together with
* `UNESCAPE_VERBATIM` or `UNESCAPE_IGNORE`.
*/
UNESCAPE_EINVAL = 1,
/**
* For any unrecognised character '#',
* '\#' results in '#'.
*
* Cannot be used together with
* `UNESCAPE_EINVAL` or `UNESCAPE_IGNORE`.
*/
UNESCAPE_VERBATIM = 2,
/**
* For any unrecognised character '#',
* '\#' results in '\#'.
*
* Cannot be used together with
* `UNESCAPE_EINVAL` or `UNESCAPE_VERBATIM`.
*/
UNESCAPE_IGNORE = 4,
/**
* '\&' resolves to the byte 255 (0xFF).
*
* If not used, '\&' is handled as an
* unsupported escape.
*/
UNESCAPE_AMPERSAND = 8,
/**
* '\0' resolves to the byte sequence
* 192 128 (0xC0 0x80).
*
* If not used, '\0' resolves to a
* 0 byte (termination).
*/
UNESCAPE_MOD_UTF8 = 16,
};
/**
* Convert file permission from machine representation to human representation.
*
* @etymology Convert to (human)-representation: `(mode)_t`.
*
* @param buffer Sufficiently large buffer for the output, or `NULL`.
* 18 characters is always sufficient, regardless of `mode`.
* @param perm Machine representation of the permissions, will be masked with 07777.
* @param mode Representation style, 0 for default.
* @return Human representation of the file permissions, `NULL` on error.
* On success, the caller is responsible for deallocating the
* returned pointer, if and only if `buffer` is `NULL`.
*
* @throws EINVAL If `mode` is invalid.
* @throws ENOMEM The process cannot allocate more memory.
*/
char* humanmode(char* restrict, mode_t, enum humanmode_mode);
/**
* Parses a human representation of file permissions, and updates to file permissions.
*
* Assuming the current file permissions is `value`, and neither
* `mode` nor `mask` is `NULL`, the new permissions should be
* `value & ~*mask | *mode`. The new mode (includes file type) should
* be `value & ~*mask | *mode & 07777`.
*
* @etymology Convert to (machine)-representation: `(mode)_t`.
*
* @param mode Output parameter for the bits to set, may be `NULL`.
* @param mask Output parameter for the bits to update, may be `NULL`.
* @param str The file permission to parse, must not include file type or be `NULL`.
* @return Zero on success, -1 on error.
*
* @throws EINVAL If `str` is not parseable.
*/
int machinemode(mode_t* restrict, mode_t* restrict, const char* restrict)
__GCC_ONLY(__attributes__((__nonnull__(3))));
/**
* Convert a file size of file offset from machine representation to human representation.
*
* @etymology Convert to (human)-representation: `(size)_t`.
*
* @param buffer A buffer than shall be used if it is sufficiently large.
* @param bufsize The allocation size of `buffer`.
* Must be 0 if and only if `buffer` is `NULL`.
* @param size The value to convert.
* @param mode Representation style, 0 for default.
* @param detail See documentation for the select value on `mode`.
* @param point The symbol to use for decimal points. `NULL` or empty for default.
* @param intraspacing Spacing between values and units. `NULL` or empty for none.
* This value should depend on language and context. For English
* this value should be "" or "-", but in for example Swedish it
* should always be " ". Hence this value is a string rather than
* a booleanic integer.
* @param interspacing Spacing between value–unit-pairs. `NULL` for default (" ").
* This value should depend on language and context.
* @return Human representation of the file size/offset, `NULL` on error.
* On success, the caller is responsible for deallocating the
* returned pointer, if and only if it is not `buffer`.
*
* @throws EINVAL If `mode` is invalid.
* @throws EINVAL If `mode & HUMANSIZE_EXACT` and `detail < 0`.
* @throws ENOMEM The process cannot allocate more memory.
*/
char* humansize(char*, size_t, size_t, enum humansize_mode, int, const char* restrict,
const char* restrict, const char* restrict)
__GCC_ONLY(__attribute__((__warn_unused_result__)));
/* TODO machinesize */
/* @etymology Convert to (machine)-representation: `(size)_t`. */
int machinesize(size_t* restrict size, const char* restrict str, enum machinesize_mode mode,
const char* restrict space, const char* restrict point);
#ifdef __C99__
/* TODO humandur */
/* @etymology Convert to (human)-representation: (dur)ation. */
int humandur(intmax_t sec, long int nsec, const char* restrict point, const char* restrict format,
const char* restrict intraspacing, const char* restrict interspacing);
/* TODO machinedur */
/* @etymology Convert to (machine)-representation: (dur)ation. */
int machinedur(intmax_t* restrict sec, long int* nsec, const char* restrict str,
const char* restrict space, const char* restrict point);
/* TODO machineint */
/* @etymology Convert to (machine)-representation: signed (int)eger. */
char* machineint(intmax_t* restrict r, const char* restrict str)
__GCC_ONLY(__attribute__((__warn_unused_result__)));
# ifdef __CONST_CORRECT
# define machineint(...) (__const_correct_2p(machineint, __VA_ARGS__))
# endif
/* TODO machineuint */
/* @etymology Convert to (machine)-representation: (u)nsigned (int)eger. */
char* machineuint(uintmax_t* restrict r, const char* restrict str)
__GCC_ONLY(__attribute__((__warn_unused_result__)));
# ifdef __CONST_CORRECT
# define machineuint(...) (__const_correct_2p(machineuint, __VA_ARGS__))
# endif
#endif
/* TODO machinefloat */
/* @etymology Convert to (machine)-representation: (float)ing-point number. */
int machinefloat(long double* restrict r, const char* restrict str,
const char* restrict space, const char* restrict comma);
#ifdef __CONST_CORRECT
# define machinefloat(...) (__const_correct_2(machinefloat, __VA_ARGS__))
#endif
/**
* Parse an escaped string.
*
* Supported escapes:
* \' \" \$ \& \? \\ \/ \### \a \b \e \f \n
* \r \t \s \u#### \u{#…} \U######## \v \x##
* \^@…\^_
* \NUL \SOH \STX \ETX \EOT \ENQ \ACK \BEL \BS \HT
* \LF \VT \FF \CR \SO \SI \DLE \DC1 \DC2 \DC3 \DC4
* \NAK \SYN \ETB \CAN \EM \SUB \ESC \FS \GS \RS
* \US \SP \DEL
*
* Unsupported escapes:
* \N{character name}
*
* @etymology (Unescape) escaped string.
*
* @param str The escaped string, may be edited, may be `NULL`.
* Must not be reused on error.
* @param mode How unrecognised escapes should be handled,
* and other configurations, 0 for default.
* @return The new end of `str` is returned. `NULL` is returned
* on error or if `str` is `NULL`.
*
* @throws 0 `str` is `NULL`.
* @throws EINVAL If `mode` is invalid.
* @throws EINVAL If `str` is invalid and `mode & UNESCAPE_EINVAL`.
*/
char* unescape(char*, enum unescape_mode);
/**
* Escapes a string.
*
* @etymology (Escape) string.
*
* @param str The unescaped string, may be `NULL`.
* @param quote The queue character, must be either ', "
* or a NUL-character (for no surrounding quotes).
* Note, these quotes are not added to output.
* @return Escaped variant of the string, `NULL`.
* You are responsible for deallocating the
* returned pointer.
*
* @throws 0 `str` is `NULL`.
* @throws EINVAL If `quote` is invalid.
* @throws ENOMEM The process cannot allocate more memory.
*/
char* escape(const char* restrict)
__GCC_ONLY(__attribute__((__malloc__, __warn_unused_result__)));
#endif
#endif
