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@louisswarren
louisswarren / Makefile
Last active March 10, 2023 23:17
Include files at compile time in C
.PHONY: test
test: main
./$<
main: main.o incl_hello.o incl_message.o
main.o: main.c include_file.h
incl_%.o: incl_%.txt
@# If you always want to use includes as strings, you can check that
@# they are null-terminated at compile-time:
@louisswarren
louisswarren / trim.sh
Created February 9, 2023 00:29
Trim audio files with fade
#!/bin/sh
# Usage:
# trim FILE START END FADE_IN FADE_OUT
# 1 2 3 4 5
# Trim the file between START and END, with fade in and out, and
# 2 seconds of silence after
dur=`expr "${3%:*}" \* 60 + "${3#*:}" - "${2%:*}" \* 60 - "${2#*:}"`
fo=`expr "$dur" - $5`
@louisswarren
louisswarren / vet.sh
Created February 6, 2023 02:00
Vet which media files to copy
#!/bin/sh
vet() {
echo "Playing $1"
mpv --no-audio-display "$1"
read x
if [ "$x" == "y" ]; then
cp -v "$1" "$2/"
else
echo "Skipping $1"
fi
@louisswarren
louisswarren / html.c
Created January 29, 2023 02:23
HTML generation in C
#include <stdio.h>
static const char *closebuff[1024];
static const char tabs[] = "\t\t\t\t\t\t\t\t";
void
put(int *t, const char *msg)
{
const char *indent = tabs + sizeof(tabs) - 1 - *t;
printf("%s%s\n", indent < tabs ? tabs : indent, msg);
@louisswarren
louisswarren / fullwidth.c
Last active January 13, 2023 21:57
Fullwidth text is even more upper case than upper case
#include <stdio.h>
#include <stdint.h>
int
main(void)
{
int c, d;
while ((c = getchar()) != EOF) {
d = c & 0x1f;
if ((c | 0x20) > 0x60 && d < 26) {
@louisswarren
louisswarren / Makefile
Last active December 30, 2022 08:10
Tiny library for PPM output
.PHONY: default
default: spectrum.png
.PHONY: waves-video
waves-video: waves
./$< | mpv --no-correct-pts --fps=30 --scale=oversample -
.PHONY: test test-video
test: nz.png
sxiv $^
@louisswarren
louisswarren / spectrum.c
Last active December 30, 2022 08:00
Generate all hues in the colour spectrum
/*
* Idea: We want to cycle through all hues, with maximum saturation and value,
* using RGB. This gives 1530 = 3! * (256 - 3!) colours:
000-0fe: ff 00-fe 00
0ff-1fd: ff-01 ff 00
1fe-2fc: 00 ff 00-fe
2fd-3fb: 00 ff-01 ff
3fc-4fa: 00-fe 00 ff
4fb-5f9: ff 00 ff-01
@louisswarren
louisswarren / testing.py
Last active December 28, 2022 05:40
Testing using decorators
import io
import sys
class wrap_stdio:
def __init__(self, io_in = ''):
self.io_in = io.StringIO(io_in)
self.io_out = io.StringIO()
self.stdin = sys.stdin
self.stdout = sys.stdout
@louisswarren
louisswarren / coding-style.sql
Created December 3, 2022 00:55
My coding style for SQL
/* Idea:
* Use 8 spaces for indenting the body of clauses
* Use 4 spaces for all other indentation
* Set your editor to expand tab to 4 spaces
This is highly readible while minimising effort while writing.
Indentation that requires manual character-level alignment would be
extremely painful (for me).
*/
with
@louisswarren
louisswarren / .gitignore
Last active August 21, 2022 00:02
CPython testing
*.o
*.o
primes.*.so