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annotate toys/other/dos2unix.c @ 674:7e846e281e38

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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.
author Rob Landley <rob@landley.net>
date Mon, 08 Oct 2012 00:02:30 -0500
parents 6df4ccc0acbe
children 786841fdb1e0
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * dos2unix.c - convert newline format
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4 *
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5 * Copyright 2012 Rob Landley <rob@landley.net>
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6
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7 USE_DOS2UNIX(NEWTOY(dos2unix, NULL, TOYFLAG_BIN))
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8 USE_DOS2UNIX(OLDTOY(unix2dos, dos2unix, NULL, TOYFLAG_BIN))
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9
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10 config DOS2UNIX
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11 bool "dos2unix/unix2dos"
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12 default y
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13 help
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14 usage: dos2unix/unix2dos [file...]
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15
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16 Convert newline format between dos (\r\n) and unix (just \n)
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17 If no files listed copy from stdin, "-" is a synonym for stdin.
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18 */
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19
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7e846e281e38 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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20 #define FOR_dos2unix
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21 #include "toys.h"
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22
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23 GLOBALS(
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24 char *tempfile;
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25 )
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26
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27 static void do_dos2unix(int fd, char *name)
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28 {
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29 char c = toys.which->name[0];
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30 int outfd = 1, catch = 0;
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31
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32 if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile);
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33
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34 for (;;) {
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35 int len, in, out;
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36
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37 len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2);
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38 if (len<0) {
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39 perror_msg("%s",name);
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40 toys.exitval = 1;
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41 }
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42 if (len<1) break;
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43
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44 for (in = out = 0; in < len; in++) {
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45 char x = toybuf[in+sizeof(toybuf)/2];
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46
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47 // Drop \r only if followed by \n in dos2unix mode
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48 if (catch) {
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49 if (c == 'u' || x != '\n') toybuf[out++] = '\r';
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50 catch = 0;
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51 // Add \r only if \n not after \r in unix2dos mode
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52 } else if (c == 'u' && x == '\n') toybuf[out++] = '\r';
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53
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54 if (x == '\r') catch++;
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55 else toybuf[out++] = x;
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56 }
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57 xwrite(outfd, toybuf, out);
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58 }
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59 if (catch) xwrite(outfd, "\r", 1);
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60
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61 if (fd) replace_tempfile(-1, outfd, &TT.tempfile);
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62 }
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63
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64 void dos2unix_main(void)
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65 {
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66 loopfiles(toys.optargs, do_dos2unix);
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67 }