| /* iconv.c - Convert character encoding |
| * |
| * Copyright 2014 Felix Janda <felix.janda@posteo.de> |
| * |
| * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/iconv.html |
| * |
| * Deviations from posix: no idea how to implement -l |
| |
| USE_ICONV(NEWTOY(iconv, "cst:f:", TOYFLAG_USR|TOYFLAG_BIN)) |
| |
| config ICONV |
| bool "iconv" |
| default y |
| depends on TOYBOX_ICONV |
| help |
| usage: iconv [-f FROM] [-t TO] [FILE...] |
| |
| Convert character encoding of files. |
| |
| -c Omit invalid chars |
| -f Convert from (default UTF-8) |
| -t Convert to (default UTF-8) |
| */ |
| |
| #define FOR_iconv |
| #include "toys.h" |
| #include <iconv.h> |
| |
| GLOBALS( |
| char *f, *t; |
| |
| void *ic; |
| ) |
| |
| static void do_iconv(int fd, char *name) |
| { |
| char *outstart = toybuf+2048; |
| size_t outlen, inlen = 0; |
| int readlen = 1; |
| |
| for (;;) { |
| char *in = toybuf, *out = outstart; |
| |
| if (readlen && 0>(readlen = read(fd, in+inlen, 2048-inlen))) { |
| perror_msg("read '%s'", name); |
| return; |
| } |
| inlen += readlen; |
| if (!inlen) break; |
| |
| outlen = 2048; |
| iconv(TT.ic, &in, &inlen, &out, &outlen); |
| if (in == toybuf) { |
| // Skip first byte of illegal sequence to avoid endless loops |
| if (toys.optflags & FLAG_c) in++; |
| else *(out++) = *(in++); |
| inlen--; |
| } |
| if (out != outstart) xwrite(1, outstart, out-outstart); |
| memmove(toybuf, in, inlen); |
| } |
| } |
| |
| void iconv_main(void) |
| { |
| if (!TT.t) TT.t = "UTF-8"; |
| if (!TT.f) TT.f = "UTF-8"; |
| |
| if ((iconv_t)-1 == (TT.ic = iconv_open(TT.t, TT.f))) |
| perror_exit("%s/%s", TT.t, TT.f); |
| loopfiles(toys.optargs, do_iconv); |
| if (CFG_TOYBOX_FREE) iconv_close(TT.ic); |
| } |