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Luiz Felipe Silva Silva97

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Silva97 / rfc1071.asm
Created June 23, 2020 01:28
Implementação do algoritmo de checksum RFC 1071 em Assembly x86-64
; Implementação do algoritmo de checksum RFC 1071 em Assembly x86-64.
; Exercício proposto pelo Frederico Pissarra.
bits 64
default rel
section .text
; unsigned short cksum( void *ptr, size_t size );
; Entrada: RDI = ptr
@Silva97
Silva97 / pipe_example.c
Created June 17, 2020 17:34
#include <stdio.h>
#include <unistd.h>
enum {
READ = 0,
WRITE,
};
int main(void)
{
@Silva97
Silva97 / index.html
Last active June 12, 2020 18:56
Observer in JS
<!DOCTYPE html>
<html>
<head>
<title>Observer</title>
<script src="./main.js"></script>
<style>
.list {
display: flex;
flex-direction: column;
@Silva97
Silva97 / unicode_example.c
Created April 3, 2020 18:57
// Exemplo de impressão de caracteres Unicode em C.
#include <stdio.h>
#include <locale.h>
#include <wchar.h>
int main(void)
{
wchar_t str[] = L"Oi ✌ cara! €€€";
setlocale(LC_CTYPE, "pt_BR.utf8");
@Silva97
Silva97 / qsort_example.c
Created March 21, 2020 23:49
#include <stdio.h>
#include <stdlib.h>
int cmpfloat(const void *n1, const void *n2)
{
return *( (const float *) n1 ) > *( (const float *) n2 );
}
#define SIZE 3
@Silva97
Silva97 / triangle.c
Created March 20, 2020 15:37
#include <stdio.h>
#include <stdlib.h>
void triangle(int, int);
int main(int argc, char **argv)
{
triangle(atoi(argv[1]), 0); // 17
return 0;
}
@Silva97
Silva97 / malloc2d-example.c
Last active November 15, 2019 16:21
#include <stdio.h>
#include <stdlib.h>
#define ASIZE 4
int main(void)
{
// char *a[ASIZE];
char **a = malloc(sizeof (char *) * ASIZE);
for (int i = 0; i < ASIZE; i++)
@Silva97
Silva97 / struct-example.c
Last active November 3, 2019 12:04
#include <stdio.h>
#include <stdlib.h>
struct example {
void (*add)(struct example *, int);
void (*show)(struct example *);
int number;
};
void example_add(struct example *this, int n)
@Silva97
Silva97 / crackme00.c
Created October 30, 2019 23:39
/* Just a simple crackme.
* For compile this crackme, download the CCS tool from:
* https://github.com/Silva97/cli-tools
*
* And run:
* $ gcc `./ccs crackme00.c` -o crackme00
*/
#include <stdio.h>
#include <string.h>
@Silva97
Silva97 / 128bit-division.c
Last active September 30, 2019 21:34
Exemplo de divisão de um número de 128 bits
#include <stdio.h>
#include <inttypes.h>
int asmdiv(uint64_t highq, uint64_t lowq, uint64_t divisor)
{
uint64_t quotient;
uint64_t modulous;
__asm__ __volatile__ (
"movq %[highq], %%rdx\n\t"