Projet

Général

Profil

Programme informatique lecture du signal » gbgb2.c

Oscar Guillet, 28/01/2020 18:01

 
#include <stdio.h>
#include <string.h>
#include <stdint.h>

typedef struct {
uint8_t octet1;
uint8_t octet2;
uint8_t octet3;
uint8_t octet4;
} quartet;

int main ( int argc, char **argv)
{
int i;
char buff[26];
char buff2[18];
int32_t values[8];
uint32_t valbin[8];
quartet value;

while (fread(&buff, 26, 1, stdin)) {
/*buff[25] = '\0';*/
if (strncmp(buff, "#################\n", (size_t)18) == 0) {
if (!(fread(&buff2, 18, 1, stdin))) {
fprintf(stderr, "Erreur lesture après ###...#");
return(1);
} else {
/*buff2[17] = '\0';*/
strncpy(buff, &buff[18], 8);
strncpy(&buff[8], buff2, 18);
}
}


i = 3;

value.octet1 = buff[3*i+1];
value.octet2 = buff[3*i+2];
value.octet3 = buff[3*i+3];
value.octet4 = 0;
/*memcpy(&values[i], &value, sizeof(quartet));*/

valbin[i] = buff[3*i+1]*256*256*256 + buff[3*i+2]*256*256 + buff[3*i+3]*256;
memcpy(&values[i], &valbin[i], sizeof(int32_t));

if (value.octet1 & 0b10000000) {
printf("Valeur négative trouvée: %02x %02x %02x %d\n", value.octet1, value.octet2, value.octet3, values[i]);
}
fprintf(stdout, "%02x %02x %02x %d", value.octet1, value.octet2, value.octet3, values[i]/256);

/*
for (i=1; i<25; i++) {
fprintf(stdout, "%02x ", buff[i]);
}
*/
printf("\n");
}
}
(1-1/2)