mirror of
https://git.telodendria.io/Telodendria/Cytoplasm.git
synced 2024-11-24 21:18:49 +03:00
3a683dbb70
These are installed to the system and some compilers may not find the headers in the current directory if we don't do this, even though according to the C standard, either should work.
117 lines
4 KiB
C
117 lines
4 KiB
C
/*
|
|
* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
|
|
*
|
|
* 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 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.
|
|
*/
|
|
|
|
#ifndef CYTOPLASM_UTIL_H
|
|
#define CYTOPLASM_UTIL_H
|
|
|
|
/***
|
|
* @Nm Util
|
|
* @Nd Some misc. helper functions that don't need their own headers.
|
|
* @Dd February 15 2023
|
|
*
|
|
* This header holds a number of random functions related to strings,
|
|
* time, the filesystem, and other simple tasks that don't require a
|
|
* full separate API. For the most part, the functions here are
|
|
* entirely standalone, depending only on POSIX functions, however
|
|
* there are a few that depend explicitly on a few other APIs. Those
|
|
* are noted.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "Stream.h"
|
|
#include "UInt64.h"
|
|
|
|
/**
|
|
* Get the current timestamp in milliseconds since the Unix epoch. This
|
|
* uses
|
|
* .Xr gettimeofday 2
|
|
* and time_t, and converts it to a single number, which is then
|
|
* returned to the caller.
|
|
* .Pp
|
|
* A note on the 2038 problem: as long as sizeof(time_t) >= 8, that is,
|
|
* as long as the time_t type is 64 bits or more, then everything
|
|
* should be fine. On most, if not, all, 64-bit systems, time_t is 64
|
|
* bits. time_t is promoted to a 64-bit integer before it is converted
|
|
* to milliseconds, so there is no risk of overflue due to the
|
|
* multiplication by 1000. However, if time_t is only 32 bits, it will
|
|
* overflow before it even gets to this function, which will cause this
|
|
* function to produce unexpected results.
|
|
*/
|
|
extern UInt64 UtilServerTs(void);
|
|
|
|
/**
|
|
* Use
|
|
* .Xr stat 2
|
|
* to get the last modified time of the given file, or zero if there
|
|
* was an error getting the last modified time of a file. This is
|
|
* primarily useful for caching file data.
|
|
*/
|
|
extern UInt64 UtilLastModified(char *);
|
|
|
|
/**
|
|
* This function behaves just like the system call
|
|
* .Xr mkdir 2 ,
|
|
* but it creates any intermediate directories as necessary, unlike
|
|
* .Xr mkdir 2 .
|
|
*/
|
|
extern int UtilMkdir(const char *, const mode_t);
|
|
|
|
/**
|
|
* Sleep the calling thread for the given number of milliseconds.
|
|
* POSIX does not have a very friendly way to sleep, so this wraps
|
|
* .Xr nanosleep 2
|
|
* to make its usage much, much simpler.
|
|
*/
|
|
extern int UtilSleepMillis(UInt64);
|
|
|
|
/**
|
|
* This function works identically to the POSIX
|
|
* .Xr getdelim 3 ,
|
|
* except that it assumes pointers were allocated with the Memory API
|
|
* and it reads from a Stream instead of a file pointer.
|
|
*/
|
|
extern ssize_t UtilGetDelim(char **, size_t *, int, Stream *);
|
|
|
|
/**
|
|
* This function is just a special case of
|
|
* .Fn UtilGetDelim
|
|
* that sets the delimiter to the newline character.
|
|
*/
|
|
extern ssize_t UtilGetLine(char **, size_t *, Stream *);
|
|
|
|
/**
|
|
* Get a unique number associated with the current thread.
|
|
* Numbers are assigned in the order that threads call this
|
|
* function, but are guaranteed to be unique in identifying
|
|
* the thread in a more human-readable way than just casting
|
|
* the return value of
|
|
* .Fn pthread_self
|
|
* to a number.
|
|
*/
|
|
extern UInt32 UtilThreadNo(void);
|
|
|
|
#endif /* CYTOPLASM_UTIL_H */
|