int pm_get_signed_int( FILE* file)
{
register int sign;
register char ch;
register int i;
sign = 1;
do
{
ch = pm_getc( file );
}
while ( ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' );
if ( (ch < '0' || ch > '9') && (ch != '-') )
pm_erreur( "junk in file where an integer should be" );
if (ch == '-') {
sign = -1;
ch = pm_getc( file );
if ( ch < '0' || ch > '9' )
pm_erreur( "junk in file where an integer should be" );
}
i = 0;
do
{
i = i * 10 + ch - '0';
ch = pm_getc( file );
}
while ( ch >= '0' && ch <= '9' );
i *= sign;
return i;
}
int main(int argc, char* argv[])
{
FILE* ifp;
bit* bitmap;
int ich1, ich2, rows, cols ;
int i,j ;
/* Test des arguments */
if ( argc != 2 ){
printf("\nUsage : %s fichier \n\n", argv[0]);
exit(0);
}
/* Ouverture */
ifp = fopen(argv[1],"r");
if (ifp == NULL) {
printf("erreur d'ouverture du fichier %s\n", argv[1]);
exit(1);
}
/* Lecture et vérification du Magic number */
ich1 = getc( ifp );
if ( ich1 == EOF )
pm_erreur( "EOF / erreur de lecture / nombre magique" );
ich2 = getc( ifp );
if ( ich2 == EOF )
pm_erreur( "EOF / erreur de lecture / nombre magique" );
if(ich2 != '1')
pm_erreur(" mauvais type de fichier ");
/* Lecture des dimensions */
cols = pm_getint( ifp );
rows = pm_getint( ifp );
/* Allocation memoire */
bitmap = (bit *) malloc(cols * rows * sizeof(bit));
/* Lecture */
for(i=0; i < rows; i++)
for(j=0; j < cols ; j++)
bitmap[i * cols + j] = pm_getbit(ifp);
/* Ecriture */
printf("P2\n");
printf("%d %d \n", cols, rows);
printf("1\n");
for(i=0; i < rows; i++)
for(j=0; j < cols ; j++)
printf("%u ",bitmap[i * cols + j] );
/* fermeture */
fclose(ifp);
return 0;
}
ppm_t* ppm_read(char* filename) {
FILE* ifp;
ppm_t* ppm = malloc(sizeof(ppm_t));
int ich1, ich2;
pixel_format_t pixel_format;
int i, j;
ifp = fopen(filename,"r");
if (ifp == NULL) {
printf("error in opening file %s\n", filename);
exit(1);
}
/* Magic number reading */
ich1 = getc( ifp );
if ( ich1 == EOF )
pm_erreur( "EOF / read error / magic number" );
ich2 = getc( ifp );
if ( ich2 == EOF )
pm_erreur( "EOF /read error / magic number" );
if(ich2 != '3' && ich2 != '6')
pm_erreur(" wrong file type ");
else
if(ich2 == '3')
pixel_format = ALPHA;
else
pixel_format = BINARY;
/* Reading image dimensions */
ppm->cols = pm_getint( ifp );
ppm->rows = pm_getint( ifp );
ppm->maxval = pm_getint( ifp );
/* Memory allocation */
ppm->pixmap = (color*) malloc(ppm->cols * ppm->rows * sizeof(color));
/* Reading */
for(i=0; i < ppm->rows; i++) {
for (j=0; j < ppm->cols ; j++) {
if (pixel_format == BINARY) {
PPM_AT(ppm, i, j).red = pm_getrawbyte(ifp) ;
PPM_AT(ppm, i, j).green = pm_getrawbyte(ifp) ;
PPM_AT(ppm, i, j).blue = pm_getrawbyte(ifp) ;
}
else {
PPM_AT(ppm, i, j).red = pm_getint(ifp);
PPM_AT(ppm, i, j).green = pm_getint(ifp);
PPM_AT(ppm, i, j).blue = pm_getint(ifp);
}
}
}
fclose(ifp);
return ppm;
}
double pm_get_signed_double( FILE* file)
{
register int sign;
register char ch;
register double i;
register double v;
register double nb;
sign = 1;
do
{
ch = pm_getc( file );
}
while ( ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' );
if ( (ch < '0' || ch > '9') && (ch != '-') )
pm_erreur( "junk in file where an integer should be" );
if (ch == '-') {
sign = -1;
ch = pm_getc( file );
if ( ch < '0' || ch > '9' )
pm_erreur( "junk in file where an integer should be" );
}
i = 0.0;
do
{
i = i * 10.0 + (ch - '0');
ch = pm_getc( file );
}
while ( ch >= '0' && ch <= '9' );
if (ch == '.') {
ch = pm_getc( file );
v = 0.0;
nb = 1;
do
{
v = v * 10.0 + (ch - '0');
nb *= 0.1;
ch = pm_getc( file );
}
while ( ch >= '0' && ch <= '9' );
i += v*nb;
}
i *= sign;
return i;
}
unsigned char pm_getrawbyte(FILE* file)
{
register int iby;
iby = getc( file );
if ( iby == EOF )
pm_erreur("EOF / read error ici" );
return (unsigned char) iby;
}
bit pm_getbit(FILE* file)
{
register char ch;
do
{
ch = pm_getc( file );
}
while ( ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' );
if ( ch != '0' && ch != '1' )
pm_erreur("junk in file where bits should be" );
return ( ch == '1' ) ? 1 : 0;
}
char pm_getc(FILE* file)
{
register int ich;
register char ch;
ich = getc( file );
if ( ich == EOF )
pm_erreur("EOF / read error" );
ch = (char) ich;
if ( ch == '#' )
{
do
{
ich = getc( file );
if ( ich == EOF )
pm_erreur("EOF / read error" );
ch = (char) ich;
}
while ( ch != '\n' && ch != '\r' );
}
return ch;
}
int pm_getint( FILE* file)
{
register char ch;
register int i;
do
{
ch = pm_getc( file );
}
while ( ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' );
if ( ch < '0' || ch > '9' )
pm_erreur( "junk in file where an integer should be" );
i = 0;
do
{
i = i * 10 + ch - '0';
ch = pm_getc( file );
}
while ( ch >= '0' && ch <= '9' );
return i;
}
int main(int argc, char* argv[])
{
FILE* ifp;
gray* graymap;
int ich1, ich2, rows, cols, maxval, pgmraw ;
int i, j;
/* Test des arguments */
if ( argc != 2 ){
printf("\nUsage : %s fichier \n\n", argv[0]);
exit(0);
}
/* Ouverture */
ifp = fopen(argv[1],"r");
if (ifp == NULL) {
printf("erreur d'ouverture du fichier %s\n", argv[1]);
exit(1);
}
/* Lecture du Magic number */
ich1 = getc( ifp );
if ( ich1 == EOF )
pm_erreur( "EOF / erreur de lecture / nombre magique" );
ich2 = getc( ifp );
if ( ich2 == EOF )
pm_erreur( "EOF / erreur de lecture / nombre magique" );
if(ich2 != '2' && ich2 != '5')
pm_erreur(" mauvais type de fichier ");
else
if(ich2 == '2')
pgmraw = 0;
else pgmraw = 1;
/* Lecture des dimensions [DONE] */
cols = pm_getint( ifp );
rows = pm_getint( ifp );
/* Allocation memoire */
graymap = (gray *) malloc(cols * rows * sizeof(gray));
/* Lecture [DONE] */
maxval = pm_getint( ifp );
for(i=0; i < rows; i++)
for(j=0; j < cols ; j++)
if (pgmraw)
graymap[i * cols + j] = pm_getrawbyte(ifp);
else
graymap[i * cols + j] = pm_getint(ifp);
/* Ecriture */
if(pgmraw)
printf("P2\n");
else
printf("P5\n");
printf("%d %d \n", cols, rows);
printf("%d\n",maxval);
for(i=0; i < rows; i++)
for(j=0; j < cols ; j++)
if (pgmraw) /* on stocke l'information sous forme ASCII */
printf( "%u ", graymap[i * cols + j] );
else /* on stocke l'information sous forme binaire */
printf( "%c", graymap[i * cols + j] );
/* fermeture */
fclose(ifp);
return 0;
}
