/**
* Assign num and compute parents.
*/
void Graph::assignNum( Vertex v )
{
v.num = counter++;
v.visited = true;
for each Vertex w adjacent to v
if( !w.visited )
{
w.parent = v;
assignNum( w );
}
}
IOPair::IOPair(char fileName[]){
FILE *file;
file = std::fopen(fileName, "r");
char line[512], intbuf[100], ch;
int type, nc, nr, maxval, i, j, k, found;
if ((file = fopen(fileName, "r")) == NULL) {
printf("IMGOPEN: Couldn't open '%s'\n", fileName);
return;
}
//Set name, get traits of picture, assign number
this->entireFile = getNameFromFile(fileName);
getTraitsFromName();
assignNum();
//Scan pnm type information, expecting P5
std::fgets(line, 511, file);
sscanf(line, "P%d", &type);
if (type != 5 && type != 2) {
printf("ERROR: Only handles pgm files (type P5 or P2)\n");
fclose(file);
return;
}
//Get dimensions of pgm
fgets(line, 511, file);
sscanf(line, "%d %d", &nc, &nr);
this->rows = nr;
this->cols = nc;
sscanf(line, "%d", &maxval);
if (maxval > 255){
printf("ERROR: Only handles pgm files of 8 bits or less.\n");
fclose(file);
return;
}
//Get maxval
fgets(line, 511, file);
sscanf(line, "%d", &maxval);
if (maxval > 255) {
printf("IMGOPEN: Only handles pgm files of 8 bits or less\n");
fclose(file);
return;
}
//Initialize GrayMap according to dimensions (all 0)
initGrayMap(nr, nc);
//Read in pixels to grayMap
if (type==5){
for (int i=0; i<nr; i++){
for (int j=0; j<nc; j++){
int rawPixel = fgetc(file);
this->grayMap[i][j] = rawPixel/255.0;
}
}
}
else if (type == 2) {
for (i = 0; i < nr; i++) {
for (j = 0; j < nc; j++) {
k = 0; found = 0;
while (!found) {
ch = (char) fgetc(file);
if (ch >= '0' && ch <= '9') {
intbuf[k] = ch; k++;
} else {
if (k != 0) {
intbuf[k] = '\0';
found = 1;
}
}
}
int rawPixel = atoi(intbuf);
this->grayMap[i][j] = rawPixel/255.0;
}
}
}
fclose(file);
}
