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Carlo Alberto Ferraris CAFxX

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CAFxX / re2struct.go
Last active April 28, 2022 01:51
Parse regular expressions into structs (Golang)
package main
import (
"encoding"
"fmt"
"reflect"
"regexp"
"strconv"
"time"
)
@CAFxX
CAFxX / bigquery_prevent_concurrent_runs.sql
Last active April 23, 2022 07:30
Ensure at most a single BigQuery scheduled query is running at one time
DECLARE check_running_jobs DEFAULT (
SELECT IF(COUNT(*) > 1, ERROR('query already running'), NULL)
FROM `region-name`.INFORMATION_SCHEMA.JOBS_BY_PROJECT
WHERE state <> 'DONE'
);
@CAFxX
CAFxX / custom_key_map.go
Created April 22, 2022 09:40
Golang map with custom-compare/hash keys
package main
import (
"encoding/binary"
"fmt"
"hash/maphash"
"math/rand"
)
type Comparable[T any] interface {
@CAFxX
CAFxX / example_test.go
Created April 22, 2022 08:24
reflect.SliceHeader and reflect.StringHeader examples
package reflect_test
// Extracted from https://go-review.googlesource.com/c/go/+/401434
import (
"fmt"
"reflect"
"unsafe"
)
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CAFxX / shortstring.go
Created April 14, 2022 10:09
package shortstring
import (
"reflect"
"runtime"
"unsafe"
)
type shortstring struct {
ptr unsafe.Pointer
@CAFxX
CAFxX / LUT.c
Created January 18, 2022 01:17
#include <immintrin.h>
static int lut32x(int32_t *inout, __m512i lutk[], __m512i lutv[], int nlut) {
__m512i bin = _mm512_set1_epi32(*inout);
for (int i=0; i<nlut; i++) {
__mmask16 mask = _mm512_cmpeq_epi32_mask(bin, lutk[i]);
if (mask == 0) continue;
__m512i bout = _mm512_maskz_compress_epi32(mask, lutv[i]);
*inout = _mm_extract_epi32(_mm512_extracti32x4_epi32(bout, 0), 0);
@CAFxX
CAFxX / bijective_map.go
Created November 22, 2021 06:34
package container
type BijectiveMap[A, B comparable] struct {
m1 map[A]B
m2 map[B]A
}
func (m *BijectiveMap[A, B]) GetB(a A) (B, bool) {
if m.m1 == nil {
var zero B
@CAFxX
CAFxX / gedi-adblock-modal-remover.js
Last active August 30, 2021 22:49
// ==UserScript==
// @name La Stampa/Repubblica Adblock Modal Remover
// @name:it La Stampa/Repubblica Elimina Messaggio Adblock
// @namespace http://tampermonkey.net/
// @version 0.1
// @description Remove the adblock modal on lastampa.it and repubblica.it
// @description:it Elimina il messaggio modale che impedisce l'uso dei siti di La Stampa (lastampa.it) e Repubblica (repubblica.it) in caso di presenza di adblocker
// @author CAFxX
// @match https://*.lastampa.it/*
// @match https://*.repubblica.it/*
@CAFxX
CAFxX / workqueue.go
Created August 25, 2021 00:19
package main
import "sync"
import "fmt"
type Work interface {
Process()
}
type WorkFunc func()
@CAFxX
CAFxX / fls.c
Last active August 17, 2021 09:30
// fast file list (linux)
// adapted from https://man7.org/linux/man-pages/man2/getdents.2.html
// gcc -O3 -march=native -o fls fls.c
#define _GNU_SOURCE
#include <dirent.h> /* Defines DT_* constants */
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>