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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include "trame.h"
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#include <math.h>
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#define PI 3.14159
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// Declaration des variables
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typedef struct {
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float latitude;
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float longitude;
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} Position;
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typedef struct{
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Position rpos;
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float vitmax;
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} Zone;
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Position pos_prec;
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Zone zones[] = {
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{{44.7887762, -3.012}, 50},
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{{44.7891220, -3.013}, 70},
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};
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//Trames de tests ? modifier si n?cessaire.
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char * trames[]= {"$GPGSV,3,2,10,15,03,077,,18,04,041,42,19,85,271,,20,08,214,*7C",
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"$GPGSV,3,3,10,22,39,053,50,28,15,320,*7E",
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"$GPRMC,141914.00,A,4545.6424,N,00306.6036,E,0.4,99.4,010206,,*0C",
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"$GPGLL,4545.6424,N,00306.6036,E,141914.00,A*0E",
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"$GPGGA,141914.00,4545.0000,N,00306.6036,E,1,05,3.4,499.3,M,,M,,*7D",
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"$GPGSA,A,3,,03,,22,14,,01,,18,,,,3.9,3.4,1.9*39",
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"$GPVTG,99.4,T,,M,0.4,N,0.7,K*57",
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"$GPZDA,141914.00,01,02,2006,00,00*69",
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0};
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int trame_cmp(char*trame,char*type){
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int i = 1;
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int res = 1;
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while ((res == 1)&&(type[i-1] != '\0')){
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if (trame[i] != type[i-1]){
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res = 0;
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}
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i++;
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}
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return res;
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}
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int decode_int(char c){
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if (c<'0' || c>'9'){
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return -1;
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}
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return c - '0';
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}
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int decode_nombre(char * ch, int n){
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int i;
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int res = 0;
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for(i=0; i<n; i++){
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res *= 10;
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res += decode_int(ch[i]);
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}
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return res;
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}
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float conv_lat(char *ch){ //conersion de la latitude
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float res = 0; // declaration de la variable resultat
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int i;
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float val_sexa = decode_nombre(ch,4); //decodage des quatres premiers caract?res
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for (i=5; i<9; i++){
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val_sexa += (decode_int(ch[i]))*pow(10,-i+4); // on decode la partie decimale
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}
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res = (int)(val_sexa/100);// on re?oit les degres
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res = res + (val_sexa - res*100)/60; // on convertit les minutes en degres et on fait la somme
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return res;
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}
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float conv_long(char *ch){ // conversion de la longitude
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float res = 0; // variable contenant le resultat
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int i;
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float val_sexa = decode_nombre(ch,5); // decodage des 5 premiers caracteres
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for (i=6; i<10; i++){
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val_sexa += (decode_int(ch[i]))*pow(10,-i+5); // on decode la partie decimale
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}
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res = (int)(val_sexa/100); // on prend les degres
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res = res + (val_sexa - res*100)/60; // conversion des minutes en degres et ajout de la somme
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return res;
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}
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float conversion(char *ch){
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int i = 0;
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float res = 0;
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while (ch[i] != '\0'){
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i++;
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}
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if (i == 9){
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res = conv_lat(ch);
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}
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else if (i == 10){
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res = conv_long(ch);
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}
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else{res = 1000.0;}
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return res;
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}
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int decode_trame(char * trame, Position *p){
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char longi[10];
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char lati[9];
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int cpt = 0;
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int i = 0;
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int j = 0;
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int y = 0;
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if (trame_cmp(trame,"GPGGA")==1){
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while (trame[i] != '\0'){
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if (trame[i] == ','){ //On compte le nombre de virgule
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cpt += 1;
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i ++;
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}
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if (cpt == 2) { //latitude
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lati[j] = trame[i]; //conversion latitude
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j ++;
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}
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if (cpt == 4) { //longitude
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longi[y] = trame[i]; //conversion longitude
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y ++;
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}
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i ++;
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}
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p->latitude = conv_lat(lati);
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p->longitude = conv_long(longi); //conversion dans structure position
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return 1;
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}
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return 0;
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}
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float calcul_distance(Position p_1, Position p_2){
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float rayon = 6378.14; //Rayon de la Terre (km).
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float DistAng = 0;
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DistAng = (PI/180)*acos((sin(p_1.latitude)*sin(p_2.latitude)+cos(p_1.latitude)*cos(p_2.latitude)*cos(p_2.longitude-p_1.longitude))); //Calcul distance angulaire
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return DistAng*rayon; //On renvoi le calcul de la distance : D (km) = DistanceAngulaire*R.
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}
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float calcul_vitesse(Position p_1, Position p_2){
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return calcul_distance(p_1,p_2)*3600; //On calcul la vitesse (en km) avec la formule v=d/t avec t=1s.
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}
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int distance_a_la_plus_poche_zone(Position p, Zone r[], int nb_zones, float *d){
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int index = 0;
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*d = calcul_distance(p, r[0].rpos); //On initialise une distance pour pouvoir ensuite la comparer et chercher le minimum.
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for (int i = 1; i<nb_zones; i++){ //On parcours la table de zone dangereuse.
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if (calcul_distance(p,r[i].rpos) < *d){
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index = i;
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*d = calcul_distance(p,r[i].rpos);
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}
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}
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return index;
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}
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//Fonction ? modifier !!!!!
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void traitement(char * trame)
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{
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static int cpt=0;
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cpt++;
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printf ("> %s\n",trame);
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Position pos;
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int alarme;
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float vitesse;
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float seuil = 0.5;
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int index;
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float distance;
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if (trame_cmp(trame,"GPGGA")==1){
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printf ("> %s\n",trame);
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if (decode_trame(trame,&pos)==1){
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vitesse = calcul_vitesse(pos,pos_prec);
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index = distance_a_la_plus_poche_zone(pos,zones,2,&distance);
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if ((distance <= seuil) && (vitesse > zones[index].vitmax)){
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alarme = 1;
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printf("Alarme on \n");
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}
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alarme = 0;
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printf("Alarme off \n");
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}
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pos_prec.latitude = pos.latitude;
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pos_prec.longitude = pos.longitude;
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}
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}
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//Ajouter vos tests unitaires dans cette fonction.
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void tests_unitaires(void){
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if (5!=5){
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printf ("Erreur Test unitaire basique.\n");
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exit(-1);
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}
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if (trame_cmp("$GPGGA suite chaine","GPGGA")!=1){
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printf ("Erreur Test unitaire trame_cmp.\n");
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exit(-1);
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}
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if (trame_cmp("$GPGGA suite chaine","GPGGA")!=1){
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printf ("Erreur Test unitaire trame_cmp.\n");
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exit(-1);
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}
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if (trame_cmp("$GPRMC suite chaine","GPGGA")!=0){
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printf ("Erreur Test unitaire trame_cmp.\n");
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exit(-1);
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}
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if (trame_cmp("$GPRMC... ", "GPRMC" )!=1){
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exit(-1);
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}
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if (trame_cmp("$APRMC...", "GPGGA")!=0){
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printf ("Erreur Test unitaire trame_cmp.\n");
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exit(-1);
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}
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if (decode_int('0')!=0){
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printf ("Erreur Test unitaire decode_int.\n");
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exit(-1);
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}
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if (decode_int('7')!=7){
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printf ("Erreur Test unitaire decode_int.\n");
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exit(-1);
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}
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if (decode_int('A')!=-1){
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printf ("Erreur Test unitaire decode_int.\n");
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exit(-1);
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}
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if (decode_nombre("123",3)!=123){
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printf ("Erreur Test unitaire decode_nombre.\n");
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exit(-1);
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}
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if (decode_nombre("7541",2)!=75){
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printf ("Erreur Test unitaire decode_nombre.\n");
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exit(-1);
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}
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if (fabs(conv_lat("3723.2475")-37.387458) >= pow(10,-6)){
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printf ("Erreur Test unitaire conv_lat.\n");
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exit(-1);
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}
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if (fabs(conv_long("00306.6036")-3.11006) >= pow(10,-6)){
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printf ("Erreur Test unitaire conv_long.\n");
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exit(-1);
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}
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if (fabs(conversion("3723.2475")-37.387458) >= pow(10,-6)){
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printf ("Erreur Test unitaire conversion.\n");
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exit(-1);
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}
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if (fabs(conversion("00306.6036")-3.11006) >= pow(10,-6)){
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printf ("Erreur Test unitaire conversion.\n");
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exit(-1);
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}
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}
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// Ne pas modifier cette fonction
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int main(int argc,char ** argv)
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{
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tests_unitaires();
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// Affichage des trames definies dans la table trames.
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printf ("Trames de tests tableau trames:\n");
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int i=0;
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while (trames[i])
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traitement(trames[i++]);
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if (!trame_init())
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exit(-1);
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// Affichage des trames du fichier gps.log
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char *trame;
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printf ("Trames de tests du fichier gps.log\n");
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while ((trame = trame_suivante()))
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traitement(trame);
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return 0;
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}
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