diff options
Diffstat (limited to 'lib/uniconv/u-conv-from-enc.h')
-rw-r--r-- | lib/uniconv/u-conv-from-enc.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/uniconv/u-conv-from-enc.h b/lib/uniconv/u-conv-from-enc.h new file mode 100644 index 0000000..fa0f0d3 --- /dev/null +++ b/lib/uniconv/u-conv-from-enc.h @@ -0,0 +1,91 @@ +/* Conversion to UTF-16/UTF-32 from legacy encodings. + Copyright (C) 2002, 2006-2007, 2009 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +UNIT * +FUNC (const char *fromcode, + enum iconv_ilseq_handler handler, + const char *src, size_t srclen, + size_t *offsets, + UNIT *resultbuf, size_t *lengthp) +{ +#if HAVE_UTF_NAME + char *result = (char *) resultbuf; + size_t length = *lengthp * sizeof (UNIT); + + if (mem_iconveha (src, srclen, fromcode, UTF_NAME, true, handler, + offsets, &result, &length) < 0) + return NULL; + if (offsets != NULL) + { + /* Convert 'char *' offsets to 'UNIT *' offsets. */ + size_t *offsets_end = offsets + srclen; + size_t *o; + + for (o = offsets; o < offsets_end; o++) + if (*o != (size_t)(-1)) + *o = *o / sizeof (UNIT); + } + if ((length % sizeof (UNIT)) != 0) + abort (); + *lengthp = length / sizeof (UNIT); + return (UNIT *) result; +#else + uint8_t *utf8_string; + size_t utf8_length; + UNIT *result; + + utf8_string = + u8_conv_from_encoding (fromcode, handler, src, srclen, offsets, + NULL, &utf8_length); + if (utf8_string == NULL) + return NULL; + result = U8_TO_U (utf8_string, utf8_length, resultbuf, lengthp); + if (result == NULL) + { + int saved_errno = errno; + free (utf8_string); + errno = saved_errno; + return NULL; + } + if (offsets != NULL) + { + size_t length = *lengthp; + size_t *offsets_end = offsets + srclen; + size_t *o; + size_t off8 = 0; /* offset into utf8_string */ + size_t offunit = 0; /* offset into result */ + + for (o = offsets; o < offsets_end; o++) + if (*o != (size_t)(-1)) + { + while (off8 < *o) + { + int count8 = u8_mblen (utf8_string + off8, utf8_length - off8); + int countunit = U_MBLEN (result + offunit, length - offunit); + if (count8 < 0 || countunit < 0) + abort (); + off8 += count8; + offunit += countunit; + } + if (*o != off8) + abort (); + *o = offunit; + } + } + free (utf8_string); + return result; +#endif +} |