fbt/sbase
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Eliminating the getopt disgrace.

Browse Source
This commit is contained in:
Christoph Lohmann
2013-06-14 20:20:47 +02:00
parent 75c97de593
commit 4d38f60685
28 changed files with 724 additions and 476 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
cmp.c
View File

@@ -7,51 +7,60 @@
enum { Same = 0, Diff = 1, Error = 2 };
static void
usage(void)
{
enprintf(Error, "usage: %s [-ls] file1 file2\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
bool lflag = false;
bool sflag = false;
bool same = true;
char c;
int b[2], i;
long line = 1, n = 1;
FILE *fp[2];
if((c = getopt(argc, argv, "ls")) != -1)
switch(c) {
case 'l':
lflag = true;
break;
case 's':
sflag = true;
break;
default:
exit(Error);
}
if(optind != argc-2)
enprintf(Error, "usage: %s [-ls] file1 file2\n", argv[0]);
for(i = 0; i < 2; i++)
if(!(fp[i] = fopen(argv[optind+i], "r")))
enprintf(Error, "fopen %s:", argv[optind+i]);
for(n = 1; ((b[0] = getc(fp[0])) != EOF) | ((b[1] = getc(fp[1])) != EOF); n++) {
ARGBEGIN {
case 'l':
lflag = true;
break;
case 's':
sflag = true;
break;
default:
usage();
} ARGEND;
if(argc < 2)
usage();
for(i = 0; i < 2; i++) {
if(!(fp[i] = fopen(argv[i], "r")))
enprintf(Error, "fopen %s:", argv[i]);
}
for(n = 1; ((b[0] = getc(fp[0])) != EOF) \
| ((b[1] = getc(fp[1])) != EOF); n++) {
if(b[0] == '\n')
line++;
if(b[0] == b[1])
continue;
for(i = 0; i < 2; i++)
if(b[i] == EOF)
enprintf(Diff, "cmp: EOF on %s\n", argv[optind+i]);
enprintf(Diff, "cmp: EOF on %s\n", argv[i]);
if(!lflag) {
if(!sflag)
printf("%s %s differ: char %ld, line %ld\n",
argv[optind], argv[optind+1], n, line);
argv[0], argv[1], n, line);
exit(Diff);
}
else {
} else {
printf("%4ld %3o %3o\n", n, b[0], b[1]);
same = false;
}
}
return same ? Same : Diff;
}