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/* encoding.c -- Code for working with encoded strings.
Copyright (C) 2017 Jakob Kreuze, All Rights Reserved.
This file is part of Nekopack.
Nekopack is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
Nekopack is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Nekopack. If not, see <http://www.gnu.org/licenses/>. */
#include <iconv.h>
#include <string.h>
/* Wrapper for iconv, using the conversion specified by `conv`. */
static void convert(char *in_buf, char *out_buf, size_t in_len,
size_t out_len, iconv_t conv) {
size_t in_size = in_len, out_size = out_len;
char *in_start = in_buf, *out_start = out_buf;
iconv(conv, &in_start, &in_size, &out_start, &out_size);
}
/* Decodes the UTF-16LE string specified by `in_buf` into `out_buf`. */
void utf16le_decode(char *in_buf, char *out_buf, size_t len) {
iconv_t conv = iconv_open("UTF-8", "UTF-16LE");
convert(in_buf, out_buf, len, len, conv);
iconv_close(conv);
}
/* Encodes the UTF-8 string specified by `in_buf` into a UTF-16LE string
stored in `out_buf`. */
void utf16le_encode(char *in_buf, char *out_buf, size_t len) {
iconv_t conv = iconv_open("UTF-16LE", "UTF-8");
/* This is to ensure that the null-terminator is included in the
encoded string. */
if (strlen(in_buf) == len)
len++;
convert(in_buf, out_buf, len, len * 2 + 2, conv);
iconv_close(conv);
}
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