Mercurial > hg > toybox
annotate toys/posix/uniq.c @ 694:786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
The actual code should be the same afterward, this is just cosmetic refactoring.
author | Rob Landley <rob@landley.net> |
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date | Tue, 13 Nov 2012 17:14:08 -0600 |
parents | 7e846e281e38 |
children | 00c20f410c46 |
rev | line source |
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786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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1 /* uniq.c - report or filter out repeated lines in a file |
546 | 2 * |
3 * Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org> | |
4 * | |
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Regularize command headers, update links to standards documents.
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5 * See http://opengroup.org/onlinepubs/9699919799/utilities/uniq.html |
546 | 6 |
7 USE_UNIQ(NEWTOY(uniq, "f#s#w#zicdu", TOYFLAG_BIN)) | |
8 | |
9 config UNIQ | |
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10 bool "uniq" |
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11 default y |
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12 help |
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13 usage: uniq [-cduiz] [-w maxchars] [-f fields] [-s char] [input_file [output_file]] |
546 | 14 |
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15 Report or filter out repeated lines in a file |
546 | 16 |
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17 -c show counts before each line |
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18 -d show only lines that are repeated |
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19 -u show only lines that are unique |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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20 -i ignore case when comparing lines |
786841fdb1e0
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21 -z lines end with \0 not \n |
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22 -w compare maximum X chars per line |
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23 -f ignore first X fields |
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24 -s ignore first X chars |
546 | 25 */ |
26 | |
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New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
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27 #define FOR_uniq |
546 | 28 #include "toys.h" |
29 | |
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New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
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30 GLOBALS( |
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31 long maxchars; |
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32 long nchars; |
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33 long nfields; |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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34 long repeats; |
546 | 35 ) |
36 | |
37 static char *skip(char *str) | |
38 { | |
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39 long nchars = TT.nchars, nfields; |
567 | 40 |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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41 // Skip fields first |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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42 for (nfields = TT.nfields; nfields; str++) { |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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43 while (*str && isspace(*str)) str++; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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44 while (*str && !isspace(*str)) str++; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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45 nfields--; |
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46 } |
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47 // Skip chars |
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48 while (*str && nchars--) str++; |
567 | 49 |
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50 return str; |
546 | 51 } |
52 | |
53 static void print_line(FILE *f, char *line) | |
54 { | |
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55 if (toys.optflags & (TT.repeats ? FLAG_u : FLAG_d)) return; |
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56 if (toys.optflags & FLAG_c) fprintf(f, "%7lu ", TT.repeats + 1); |
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57 fputs(line, f); |
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58 if (toys.optflags & FLAG_z) fputc(0, f); |
546 | 59 } |
60 | |
61 void uniq_main(void) | |
62 { | |
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63 FILE *infile = stdin, *outfile = stdout; |
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64 char *thisline = NULL, *prevline = NULL, *tmpline, eol = '\n'; |
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65 size_t thissize, prevsize = 0, tmpsize; |
546 | 66 |
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67 if (toys.optc >= 1) infile = xfopen(toys.optargs[0], "r"); |
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68 if (toys.optc >= 2) outfile = xfopen(toys.optargs[1], "w"); |
546 | 69 |
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70 if (toys.optflags & FLAG_z) eol = 0; |
546 | 71 |
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72 // If first line can't be read |
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73 if (getdelim(&prevline, &prevsize, eol, infile) < 0) |
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74 return; |
546 | 75 |
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76 while (getdelim(&thisline, &thissize, eol, infile) > 0) { |
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77 int diff; |
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78 char *t1, *t2; |
546 | 79 |
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80 // If requested get the chosen fields + character offsets. |
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81 if (TT.nfields || TT.nchars) { |
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82 t1 = skip(thisline); |
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83 t2 = skip(prevline); |
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84 } else { |
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85 t1 = thisline; |
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86 t2 = prevline; |
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87 } |
546 | 88 |
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89 if (TT.maxchars == 0) { |
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90 diff = !(toys.optflags & FLAG_i) ? strcmp(t1, t2) : strcasecmp(t1, t2); |
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91 } else { |
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92 diff = !(toys.optflags & FLAG_i) ? strncmp(t1, t2, TT.maxchars) |
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93 : strncasecmp(t1, t2, TT.maxchars); |
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94 } |
546 | 95 |
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96 if (diff == 0) { // same |
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97 TT.repeats++; |
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98 } else { |
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99 print_line(outfile, prevline); |
546 | 100 |
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101 TT.repeats = 0; |
546 | 102 |
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103 tmpline = prevline; |
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104 prevline = thisline; |
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105 thisline = tmpline; |
546 | 106 |
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107 tmpsize = prevsize; |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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parents:
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108 prevsize = thissize; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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109 thissize = tmpsize; |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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110 } |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
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111 } |
546 | 112 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
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113 print_line(outfile, prevline); |
546 | 114 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
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115 if (CFG_TOYBOX_FREE) { |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
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116 free(prevline); |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
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117 free(thisline); |
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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
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118 } |
546 | 119 } |