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Eliminating the getopt disgrace.

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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
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52
sort.c
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@@ -14,38 +14,49 @@ static bool uflag = false;
static struct linebuf linebuf = EMPTY_LINEBUF;
static void
usage(void)
{
eprintf("usage: %s [-ru] [file...]\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
char c;
long i;
FILE *fp;
while((c = getopt(argc, argv, "ru")) != -1)
switch(c) {
case 'r':
rflag = true;
break;
case 'u':
uflag = true;
break;
default:
exit(2);
}
if(optind == argc)
ARGBEGIN {
case 'r':
rflag = true;
break;
case 'u':
uflag = true;
break;
default:
usage();
} ARGEND;
if(argc == 0) {
getlines(stdin, &linebuf);
else for(; optind < argc; optind++) {
if(!(fp = fopen(argv[optind], "r")))
eprintf("fopen %s:", argv[optind]);
} else for(; argc > 0; argc--, argv++) {
if(!(fp = fopen(argv[0], "r")))
eprintf("fopen %s:", argv[0]);
getlines(fp, &linebuf);
fclose(fp);
}
qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines, (int (*)(const void *, const void *))linecmp);
qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines,
(int (*)(const void *, const void *))linecmp);
for(i = 0; i < linebuf.nlines; i++)
if(!uflag || i == 0 || strcmp(linebuf.lines[i], linebuf.lines[i-1]) != 0)
for(i = 0; i < linebuf.nlines; i++) {
if(!uflag || i == 0 || strcmp(linebuf.lines[i],
linebuf.lines[i-1]) != 0) {
fputs(linebuf.lines[i], stdout);
return EXIT_SUCCESS;
}
}
return 0;
}
int
@@ -53,3 +64,4 @@ linecmp(const char **a, const char **b)
{
return strcmp(*a, *b) * (rflag ? -1 : +1);
}