1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# UNIQUE -- Pass only unique lines from the (presumably sorted) standard
# input to the standard output. In other words, if a sequence of identical
# lines are found in the input, only one copy is passed to the output.
procedure t_unique()
int list, fd
pointer sp, fname, old_line, new_line, temp
bool streq()
int getline(), clpopni(), clgfil(), clplen(), open()
begin
call smark (sp)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (old_line, SZ_LINE, TY_CHAR)
call salloc (new_line, SZ_LINE, TY_CHAR)
list = clpopni ("files")
while (clgfil (list, Memc[fname], SZ_FNAME) != EOF) {
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
if (clplen (list) > 1) {
call printf ("\n\n==> %s <==\n")
call pargstr (Memc[fname])
}
Memc[old_line] = EOS
while (getline (fd, Memc[new_line]) != EOF) {
if (streq (Memc[old_line], Memc[new_line]))
next
call putline (STDOUT, Memc[new_line])
# Swap buffers.
temp = old_line
old_line = new_line
new_line = temp
}
call close (fd)
}
call sfree (sp)
end
|
