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annotate toys/sed.c @ 234:163498bf547b

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Move NEWTOY() list from end of toylist.h to generated/newtoys.h.
author Rob Landley <rob@landley.net>
date Sat, 19 Jan 2008 17:43:27 -0600
parents d4176f3f3835
children 7cb15eae1664
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * sed.c - Stream editor.
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4 *
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5 * Copyright 2008 Rob Landley <rob@landley.net>
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6 *
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7 * See http://www.opengroup.org/onlinepubs/009695399/utilities/sed.c
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8
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163498bf547b Move NEWTOY() list from end of toylist.h to generated/newtoys.h.
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9 USE_SED(NEWTOY(sed, "irne*", TOYFLAG_BIN))
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10
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11 config SED
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12 bool "sed"
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13 default n
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14 help
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15 usage: sed [-irn] {command | [-e command]...} [FILE...]
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16
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17 Stream EDitor, transforms text by appling commands to each line
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18 of input.
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19 */
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20
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21 #include "toys.h"
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22 #include "lib/xregcomp.h"
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23
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24 struct sed_command {
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25 // Doubly linked list of commands.
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26 struct sed_command *next, *prev;
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27
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28 // Regexes for s/match/data/ and /match_begin/,/match_end/command
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29 regex_t *match, *match_begin, *match_end;
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30
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31 // For numeric ranges ala 10,20command
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32 int first_line, last_line;
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33
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34 // Which match to replace, 0 for all.
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35 int which;
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36
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37 // s and w commands can write to a file. Slight optimization: we use 0
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38 // instead of -1 to mean no file here, because even when there's no stdin
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39 // our input file would take fd 0.
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40 int outfd;
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41
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42 // Data string for (saicytb)
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43 char *data;
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44
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45 // Which command letter is this?
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46 char command;
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47 };
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48
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49 #define TT toy.sed
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50
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51 void sed_main(void)
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52 {
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53 struct arg_list *test;
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54
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55 for (test = TT.commands; test; test = test->next)
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56 dprintf(2,"command=%s\n",test->arg);
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57
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58 printf("Hello world\n");
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59 }