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annotate toys/pending/iconv.c @ 1265:0ecfaa7022e8 draft

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usage: is lower case (the help generator looks for that, might as well be consistent).
author Rob Landley <rob@landley.net>
date Wed, 23 Apr 2014 08:37:07 -0500
parents 69b34a10f1e7
children a302299dbb98
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1 /* iconv.c - Convert character encoding
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2 *
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3 * Copyright 2014 Felix Janda <felix.janda@posteo.de>
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4 *
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5 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/iconv.html
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6
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7 USE_ICONV(NEWTOY(iconv, "t:f:", TOYFLAG_USR|TOYFLAG_BIN))
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8
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9 config ICONV
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10 bool "iconv"
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11 default y
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12 help
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13 usage: iconv [-f FROM] [-t TO] [FILE...]
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14
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15 Convert character encoding of files.
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16
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17 -f convert from (default utf8)
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18 -t convert to (default utf8)
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19 */
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20
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21 #define FOR_iconv
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22 #include "toys.h"
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23 #include <iconv.h>
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24
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25 GLOBALS(
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26 char *from;
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27 char *to;
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28
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29 void *ic;
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30 )
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31
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32 static void do_iconv(int fd, char *name)
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33 {
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34 char *outstart = toybuf+2048;
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35 size_t inleft = 0;
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36 int len = 1;
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37
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38 do {
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39 size_t outleft = 2048;
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40 char *in = toybuf, *out = outstart;
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41
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42 len = read(fd, toybuf+inleft, 2048-inleft);
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43
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44 if (len < 0) perror_msg("read '%s'");
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45 inleft += len;
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46
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47 do {
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48 if (iconv(TT.ic, &in, &inleft, &out, &outleft) == -1
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49 && (errno == EILSEQ || (in == toybuf && errno == EINVAL)))
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50 {
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51 if (outleft) {
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52 // Skip first byte of illegal sequence to avoid endless loops
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53 *(out++) = *(in++);
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54 inleft--;
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55 }
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56 }
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57 xwrite(1, outstart, out-outstart);
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58 // Top off input buffer
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59 memmove(in, toybuf, inleft);
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60 } while (len < 1 && inleft);
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61 } while (len > 0);
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62 }
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63
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64 void iconv_main(void)
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65 {
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66 TT.ic = iconv_open(TT.to ? TT.to : "utf8", TT.from ? TT.from : "utf8");
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67 if (TT.ic == (iconv_t)-1) error_exit("bad encoding");
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68 loopfiles(toys.optargs, do_iconv);
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69 if (CFG_TOYBOX_FREE) iconv_close(TT.ic);
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70 }