Mercurial > hg > toybox
annotate toys/posix/comm.c @ 1577:ac84a209cb05 draft
sed: c needs to trigger range logic like d, D works like d when there isn't anything left in the line, and more tests.
author | Rob Landley <rob@landley.net> |
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date | Thu, 27 Nov 2014 20:38:21 -0600 |
parents | 4bfbd8b96f66 |
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1 /* comm.c - select or reject lines common to two files |
557 | 2 * |
3 * Copyright 2012 Ilya Kuzmich <ikv@safe-mail.net> | |
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/comm.html |
557 | 6 |
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Minor cleanups and refactoring. Make FLAG macros closer to what should eventually be generated for us by the build infrastructure.
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7 // <# and ># take single digit, so 321 define flags |
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8 USE_COMM(NEWTOY(comm, "<2>2321", TOYFLAG_USR|TOYFLAG_BIN)) |
557 | 9 |
10 config COMM | |
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11 bool "comm" |
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12 default y |
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13 help |
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14 usage: comm [-123] FILE1 FILE2 |
557 | 15 |
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16 Reads FILE1 and FILE2, which should be ordered, and produces three text |
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17 columns as output: lines only in FILE1; lines only in FILE2; and lines |
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18 in both files. Filename "-" is a synonym for stdin. |
557 | 19 |
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20 -1 suppress the output column of lines unique to FILE1 |
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21 -2 suppress the output column of lines unique to FILE2 |
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22 -3 suppress the output column of lines duplicated in FILE1 and FILE2 |
557 | 23 */ |
24 | |
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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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25 #define FOR_comm |
557 | 26 #include "toys.h" |
27 | |
28 static void writeline(const char *line, int col) | |
29 { | |
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30 if (col == 0 && toys.optflags & FLAG_1) return; |
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31 else if (col == 1) { |
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32 if (toys.optflags & FLAG_2) return; |
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33 if (!(toys.optflags & FLAG_1)) putchar('\t'); |
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34 } else if (col == 2) { |
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35 if (toys.optflags & FLAG_3) return; |
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36 if (!(toys.optflags & FLAG_1)) putchar('\t'); |
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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parents:
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37 if (!(toys.optflags & FLAG_2)) putchar('\t'); |
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38 } |
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39 puts(line); |
557 | 40 } |
41 | |
42 void comm_main(void) | |
43 { | |
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44 int file[2]; |
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45 char *line[2]; |
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46 int i; |
557 | 47 |
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48 if (toys.optflags == 7) return; |
557 | 49 |
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50 for (i = 0; i < 2; i++) { |
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51 file[i] = strcmp("-", toys.optargs[i]) |
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52 ? xopen(toys.optargs[i], O_RDONLY) : 0; |
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53 line[i] = get_line(file[i]); |
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54 } |
557 | 55 |
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56 while (line[0] && line[1]) { |
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57 int order = strcmp(line[0], line[1]); |
557 | 58 |
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59 if (order == 0) { |
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60 writeline(line[0], 2); |
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61 for (i = 0; i < 2; i++) { |
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62 free(line[i]); |
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63 line[i] = get_line(file[i]); |
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64 } |
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65 } else { |
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66 i = order < 0 ? 0 : 1; |
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67 writeline(line[i], i); |
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68 free(line[i]); |
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69 line[i] = get_line(file[i]); |
786841fdb1e0
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70 } |
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parents:
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71 } |
557 | 72 |
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73 /* print rest of the longer file */ |
786841fdb1e0
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74 for (i = line[0] ? 0 : 1; line[i];) { |
786841fdb1e0
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75 writeline(line[i], i); |
786841fdb1e0
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76 free(line[i]); |
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parents:
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77 line[i] = get_line(file[i]); |
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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78 } |
557 | 79 |
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Various bugfixes (mostly resource leaks) from Ashwini Sharma's static analysis, plus occasional tweak by me while reviewing them.
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80 if (CFG_TOYBOX_FREE) for (i = 0; i < 2; i++) xclose(file[i]); |
557 | 81 } |