Contents of /trunk/mkinitrd-magellan/busybox/coreutils/comm.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
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File size: 2007 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
File MIME type: text/plain
File size: 2007 byte(s)
-updated to busybox-1.13.4
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini comm implementation for busybox |
4 | * |
5 | * Copyright (C) 2005 by Robert Sullivan <cogito.ergo.cogito@gmail.com> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | #define COMM_OPT_1 (1 << 0) |
13 | #define COMM_OPT_2 (1 << 1) |
14 | #define COMM_OPT_3 (1 << 2) |
15 | |
16 | /* writeline outputs the input given, appropriately aligned according to class */ |
17 | static void writeline(char *line, int class) |
18 | { |
19 | int flags = option_mask32; |
20 | if (class == 0) { |
21 | if (flags & COMM_OPT_1) |
22 | return; |
23 | } else if (class == 1) { |
24 | if (flags & COMM_OPT_2) |
25 | return; |
26 | if (!(flags & COMM_OPT_1)) |
27 | putchar('\t'); |
28 | } else /*if (class == 2)*/ { |
29 | if (flags & COMM_OPT_3) |
30 | return; |
31 | if (!(flags & COMM_OPT_1)) |
32 | putchar('\t'); |
33 | if (!(flags & COMM_OPT_2)) |
34 | putchar('\t'); |
35 | } |
36 | puts(line); |
37 | } |
38 | |
39 | int comm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
40 | int comm_main(int argc UNUSED_PARAM, char **argv) |
41 | { |
42 | char *thisline[2]; |
43 | FILE *stream[2]; |
44 | int i; |
45 | int order; |
46 | |
47 | opt_complementary = "=2"; |
48 | getopt32(argv, "123"); |
49 | argv += optind; |
50 | |
51 | for (i = 0; i < 2; ++i) { |
52 | stream[i] = xfopen_stdin(argv[i]); |
53 | } |
54 | |
55 | order = 0; |
56 | thisline[1] = thisline[0] = NULL; |
57 | while (1) { |
58 | if (order <= 0) { |
59 | free(thisline[0]); |
60 | thisline[0] = xmalloc_fgetline(stream[0]); |
61 | } |
62 | if (order >= 0) { |
63 | free(thisline[1]); |
64 | thisline[1] = xmalloc_fgetline(stream[1]); |
65 | } |
66 | |
67 | i = !thisline[0] + (!thisline[1] << 1); |
68 | if (i) |
69 | break; |
70 | order = strcmp(thisline[0], thisline[1]); |
71 | |
72 | if (order >= 0) |
73 | writeline(thisline[1], order ? 1 : 2); |
74 | else |
75 | writeline(thisline[0], 0); |
76 | } |
77 | |
78 | /* EOF at least on one of the streams */ |
79 | i &= 1; |
80 | if (thisline[i]) { |
81 | /* stream[i] is not at EOF yet */ |
82 | /* we did not print thisline[i] yet */ |
83 | char *p = thisline[i]; |
84 | writeline(p, i); |
85 | while (1) { |
86 | free(p); |
87 | p = xmalloc_fgetline(stream[i]); |
88 | if (!p) |
89 | break; |
90 | writeline(p, i); |
91 | } |
92 | } |
93 | |
94 | if (ENABLE_FEATURE_CLEAN_UP) { |
95 | fclose(stream[0]); |
96 | fclose(stream[1]); |
97 | } |
98 | |
99 | return EXIT_SUCCESS; |
100 | } |