diff options
author | Manuel Novoa III <mjn3@codepoet.org> | 2005-09-08 10:02:49 +0400 |
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committer | Manuel Novoa III <mjn3@codepoet.org> | 2005-09-08 10:02:49 +0400 |
commit | 415f6c96287d1a43c916e23b601f0629f6bccbd7 (patch) | |
tree | ea1b72741e7cf85be78af1dea3d091992caf4572 /coreutils/uniq.c | |
parent | ae32016fc938b5074e0787654df39190364d40f3 (diff) |
Rob, I don't know why you feel some unexplainable compulsion to get rid of
a meaningless warning. But I do expect you preserve the coding style
and variable names when all you're doing is tweaking some of my code.
I repeat... do NOT change whitespace, variable names, or coding style in
any of my code simply to conform to your coding style.
Diffstat (limited to 'coreutils/uniq.c')
-rw-r--r-- | coreutils/uniq.c | 118 |
1 files changed, 70 insertions, 48 deletions
diff --git a/coreutils/uniq.c b/coreutils/uniq.c index aa26e0575..d5c6f719d 100644 --- a/coreutils/uniq.c +++ b/coreutils/uniq.c @@ -4,7 +4,19 @@ * * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> * - * Licensed under GPL v2, see file LICENSE in this tarball for details. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ @@ -19,83 +31,93 @@ #include "busybox.h" #include "libcoreutils/coreutils.h" -/* The extra data is flags to make -d and -u switch each other off */ -static const char uniq_opts[] = "cudf:s:\0\7\3\5\1\2\4"; +static const char uniq_opts[] = "f:s:cdu\0\7\3\5\1\2\4"; -#define SHOW_COUNT 1 -#define SHOW_UNIQUE 2 -#define SHOW_DUPLICATE 4 - -static FILE *open_arg(char **argv, char *mode) +static FILE *xgetoptfile_sort_uniq_s(char **argv, const char *mode) { - char *n=*argv; + const char *n; - return (n && *n != '-' && n[1]) ? bb_xfopen(n, mode) : - *mode=='r' ? stdin : stdout; + if ((n = *argv) != NULL) { + if ((*n != '-') || n[1]) { + return bb_xfopen(n, mode); + } + } + return (*mode == 'r') ? stdin : stdout; } - int uniq_main(int argc, char **argv) { FILE *in, *out; + /* Note: Ignore the warning about dups and e0 being used uninitialized. + * They will be initialized on the fist pass of the loop (since s0 is NULL). */ +#warning The dups and e0 warnings are OK, ignore them unsigned long dups, skip_fields, skip_chars, i; - const char *oldline, *oldskipped, *line, *skipped, *input_filename; + const char *s0, *e0, *s1, *e1, *input_filename; int opt; - int uniq_flags = SHOW_UNIQUE | SHOW_DUPLICATE; + int uniq_flags = 6; /* -u */ skip_fields = skip_chars = 0; while ((opt = getopt(argc, argv, uniq_opts)) > 0) { - if (opt == 'f') skip_fields = bb_xgetularg10(optarg); - else if (opt == 's') skip_chars = bb_xgetularg10(optarg); - - /* This bit uses the extra data at the end of uniq_opts to make - * -d and -u switch each other off in a very small amount of space */ - - else if ((line = strchr(uniq_opts, opt)) != NULL) { - uniq_flags &= line[8]; - uniq_flags |= line[11]; - } else bb_show_usage(); + if (opt == 'f') { + skip_fields = bb_xgetularg10(optarg); + } else if (opt == 's') { + skip_chars = bb_xgetularg10(optarg); + } else if ((s0 = strchr(uniq_opts, opt)) != NULL) { + uniq_flags &= s0[4]; + uniq_flags |= s0[7]; + } else { + bb_show_usage(); + } } input_filename = *(argv += optind); - in = open_arg(argv, "r"); - if (*argv) ++argv; - out = open_arg(argv, "w"); - if (*argv && argv[1]) bb_show_usage(); + in = xgetoptfile_sort_uniq_s(argv, "r"); + if (*argv) { + ++argv; + } + out = xgetoptfile_sort_uniq_s(argv, "w"); + if (*argv && argv[1]) { + bb_show_usage(); + } - line = skipped = NULL; + s0 = NULL; -NOT_DUPLICATE: - oldline = line; - oldskipped = skipped; - dups = 0; - /* gnu uniq ignores newlines */ - while ((line = bb_get_chomped_line_from_file(in)) != NULL) { - skipped = line; + while ((s1 = bb_get_chomped_line_from_file(in)) != NULL) { + e1 = s1; for (i=skip_fields ; i ; i--) { - skipped = bb_skip_whitespace(skipped); - while (*skipped && !isspace(*skipped)) ++skipped; + e1 = bb_skip_whitespace(e1); + while (*e1 && !isspace(*e1)) { + ++e1; + } } - for (i = skip_chars ; *skipped && i ; i--) ++skipped; - if (oldline) { - if (!strcmp(oldskipped, skipped)) { + for (i = skip_chars ; *e1 && i ; i--) { + ++e1; + } + if (s0) { + if (strcmp(e0, e1) == 0) { ++dups; /* Note: Testing for overflow seems excessive. */ continue; } -DO_LAST: - if (uniq_flags & (dups ? SHOW_DUPLICATE : SHOW_UNIQUE)) { - bb_fprintf(out, "\0%7d " + (uniq_flags & SHOW_COUNT), dups + 1); - bb_fprintf(out, "%s\n", oldline); + DO_LAST: + if ((dups && (uniq_flags & 2)) || (!dups && (uniq_flags & 4))) { + bb_fprintf(out, "\0%7d\t" + (uniq_flags & 1), dups + 1); + bb_fprintf(out, "%s\n", s0); } - free((void *)oldline); + free((void *)s0); } - goto NOT_DUPLICATE; + + s0 = s1; + e0 = e1; + dups = 0; } - if (oldline) goto DO_LAST; + if (s0) { + e1 = NULL; + goto DO_LAST; + } bb_xferror(in, input_filename); |