#if __STDC__ || defined(__cplusplus)
#define __P_(s) s
#else
#define __P_(s) ()
#endif

/* pnmscan.c */
int main __P_((int argc, char **argv));
static void print_settings __P_((struct scanmode *m));
int checkrange __P_((struct scanmode *m));
static parse_options __P_((int argc, char **argv));
static void usage __P_((char *name));
static void errexit __P_((char *format, ...));
static int gettmpfd __P_((void));
static void buildgamma __P_((unsigned char table[], double gamma));
void scan __P_((int fd, struct scanmode *m));
int initscan __P_((int fd, struct scanmode *m));
void readpage __P_((int fd, int outfd, int rowbytes, int scanlines, int invert));
void inquiry __P_((int fd));
void test_unit_ready __P_((int fd));
static int waitready __P_((int fd, int maxsec));
int setareas __P_((int fd, int halftone, u_short *coor, int patterntype));
int setvalues __P_((int fd, int paperlen, int dpi, int brightness, int contrast, int grain, int speed));
int uselut __P_((int fd, u_int nr));
int loadlut __P_((int fd, u_char *red, u_char *green, u_char *blue));
int setbacktrack __P_((int fd, int on));
int stopscan __P_((int fd));
int startscan __P_((int fd, u_int filter, u_int multibit, u_int dpi));
struct image_status *getistatus __P_((int fd));
int readlines __P_((int fd, u_char *buffer, int len, int lines));
int getdata __P_((int fd, u_char *buffer, int len, u_char *cdb));
int putdata __P_((int fd, u_char *buffer, int len, u_char *cdb));

#undef __P_