74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/* iconv.c - Convert character encoding
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*
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* Copyright 2014 Felix Janda <felix.janda@posteo.de>
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*
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* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/iconv.html
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USE_ICONV(NEWTOY(iconv, "cst:f:", TOYFLAG_USR|TOYFLAG_BIN))
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config ICONV
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bool "iconv"
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default n
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depends on TOYBOX_ICONV
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help
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usage: iconv [-f FROM] [-t TO] [FILE...]
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Convert character encoding of files.
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-f convert from (default utf8)
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-t convert to (default utf8)
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*/
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#define FOR_iconv
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#include "toys.h"
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#include <iconv.h>
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GLOBALS(
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char *from;
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char *to;
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void *ic;
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)
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static void do_iconv(int fd, char *name)
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{
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char *outstart = toybuf+2048;
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size_t inleft = 0;
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int len = 1;
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do {
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size_t outleft = 2048;
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char *in = toybuf+inleft, *out = outstart;
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len = read(fd, in, 2048-inleft);
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if (len < 0) {
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perror_msg("read '%s'");
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return;
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}
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inleft += len;
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do {
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if (iconv(TT.ic, &in, &inleft, &out, &outleft) == -1
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&& (errno == EILSEQ || (in == toybuf+inleft-len && errno == EINVAL)))
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{
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if (outleft) {
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// Skip first byte of illegal sequence to avoid endless loops
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*(out++) = *(in++);
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inleft--;
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}
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}
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xwrite(1, outstart, out-outstart);
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// Top off input buffer
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memmove(in, toybuf, inleft);
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} while (len < 1 && inleft);
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} while (len > 0);
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}
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void iconv_main(void)
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{
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TT.ic = iconv_open(TT.to ? TT.to : "utf8", TT.from ? TT.from : "utf8");
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if (TT.ic == (iconv_t)-1) error_exit("bad encoding");
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loopfiles(toys.optargs, do_iconv);
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if (CFG_TOYBOX_FREE) iconv_close(TT.ic);
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}
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