Ilan Smith ilansmith
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| #include <net/if.h> | |
| #include <stdio.h> | |
| int main(void) | |
| { | |
| struct if_nameindex *if_nidxs, *intf; | |
| if (!(if_nidxs = if_nameindex())) | |
| goto exit; |
ilansmith
/ upper_power_of_two.c
Last active
January 6, 2022 11:39
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| #include <stdio.h> | |
| #if defined(DEBUG) | |
| #define PRINT(_fmt_, ...) printf(_fmt_, __VA_ARGS__); | |
| #else | |
| #define PRINT(_fmt_, ...) | |
| #endif | |
| /* works in the range: [0x1, 0x7FFF FFFF FFFF FFFF] */ | |
| static size_t upper_power_of_two(size_t v) |
ilansmith
/ count_bits.c
Last active
January 6, 2019 13:49
Efficient count the number of bits in a 32bit bitmask
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| #include <stdlib.h> | |
| #include <stdio.h> | |
| #include <stdint.h> | |
| #define DO_PRINT 0 | |
| #define TEST_BITS(_n_, _do_print_) do { \ | |
| unsigned calculated = number_of_set_bits(_n_); \ | |
| unsigned actual = number_of_set_bits_naive(_n_); \ | |
| if (_do_print_) \ |
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| #include <unistd.h> | |
| #include <string.h> | |
| #include <stdio.h> | |
| #define ALIGN_OPTIONAL_ARGUMENT(_argc, _argv, _optstring, _optarg, _optind) \ | |
| do { \ | |
| if (!(_optarg) && (_optind) < (_argc) && \ | |
| (((_argv)[(_optind)][0] != '-') || \ | |
| !strchr(_optstring, (_argv)[(_optind)][1]))) { \ | |
| (_optarg) = (_argv)[(_optind)++]; \ |
ilansmith
/ time_limit.bat
Last active
June 15, 2019 04:35
Set Windows 10 local user time restrictions
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| @echo off | |
| set MORNING=6:00am-8:00am | |
| set SCHOOL=8:00am-1:00pm | |
| set AFTERNOON=1:00pm-6:00pm | |
| set EVENING=6:00pm-12:00am | |
| set NIGHT=12:00am-6:00am | |
| set LIMIT=SU-SA,%AFTERNOON%;F,%EVENING%;SA,%MORNING%,%SCHOOL% | |
| rem echo MORNING:%MORNING% |
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| #include <sys/stat.h> | |
| #include <sys/types.h> | |
| #include <dirent.h> | |
| #include <unistd.h> | |
| #include <stdio.h> | |
| static int path_scan(char *path) | |
| { | |
| DIR *d; | |
| struct dirent *ent; |
ilansmith
/ print_in_place.c
Created
August 19, 2017 22:13
Print "moving" objects (advancing timeline, rotating star, etc...)
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| #include <stdlib.h> | |
| #include <stdio.h> | |
| #include <unistd.h> | |
| #include <sys/select.h> | |
| #include <stdarg.h> | |
| #define CURSOR_DISSABLE "\E[?25l" | |
| #define CURSOR_ENABLE "\E[?25h" | |
| #define ARRAY_SZ(ARR) (sizeof(ARR) / sizeof(ARR[0])) |
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| #include <stdio.h> | |
| #define CLEAR "\033[00;00;00m" | |
| static void p_colour(int c1, int c2) | |
| { | |
| char col[10]; | |
| sprintf(col, "\033[%d;%dm", c1, c2); | |
| printf("\"\\033[%d;%dm\" = %scolour%s\n", c1, c2, col, CLEAR); |
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| #include <stdio.h> | |
| #include <gnu/libc-version.h> | |
| int main (void) | |
| { | |
| puts(gnu_get_libc_version()); | |
| return 0; | |
| } |
ilansmith
/ commit-msg
Created
October 9, 2016 21:45
A git hook that automatically adds a change-id to the commit message.
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| #!/bin/sh | |
| # From Gerrit Code Review 2.1.2-rc2-33-g7e30c72 | |
| # | |
| # Part of Gerrit Code Review (http://code.google.com/p/gerrit/) | |
| # | |
| # Copyright (C) 2009 The Android Open Source Project | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at |
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