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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <ctype.h>
#include <bio.h>
#include "imagefile.h"
void
usage(void)
{
fprint(2, "usage: toppm [-c 'comment'] [file]\n");
exits("usage");
}
void
main(int argc, char *argv[])
{
Biobuf bout;
Memimage *i, *ni;
int fd;
char buf[256];
char *err, *comment;
comment = nil;
ARGBEGIN{
case 'c':
comment = ARGF();
if(comment == nil)
usage();
if(strchr(comment, '\n') != nil){
fprint(2, "ppm: comment cannot contain newlines\n");
usage();
}
break;
default:
usage();
}ARGEND
if(argc > 1)
usage();
if(Binit(&bout, 1, OWRITE) < 0)
sysfatal("Binit failed: %r");
memimageinit();
err = nil;
if(argc == 0){
i = readmemimage(0);
if(i == nil)
sysfatal("reading input: %r");
ni = memmultichan(i);
if(ni == nil)
sysfatal("converting image to RGBV: %r");
if(i != ni){
freememimage(i);
i = ni;
}
if(err == nil)
err = memwriteppm(&bout, i, comment);
}else{
fd = open(argv[0], OREAD);
if(fd < 0)
sysfatal("can't open %s: %r", argv[0]);
i = readmemimage(fd);
if(i == nil)
sysfatal("can't readimage %s: %r", argv[0]);
close(fd);
ni = memmultichan(i);
if(ni == nil)
sysfatal("converting image to RGBV: %r");
if(i != ni){
freememimage(i);
i = ni;
}
if(comment)
err = memwriteppm(&bout, i, comment);
else{
snprint(buf, sizeof buf, "Converted by Plan 9 from %s", argv[0]);
err = memwriteppm(&bout, i, buf);
}
freememimage(i);
}
if(err != nil)
fprint(2, "toppm: %s\n", err);
exits(err);
}
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