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Diffstat (limited to 'newlib/iconvdata/jis0208.h')
-rw-r--r-- | newlib/iconvdata/jis0208.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/newlib/iconvdata/jis0208.h b/newlib/iconvdata/jis0208.h new file mode 100644 index 000000000..ef6b891eb --- /dev/null +++ b/newlib/iconvdata/jis0208.h @@ -0,0 +1,108 @@ +/* Access functions for JISX0208 conversion. + Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library 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 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _JIS0208_H +#define _JIS0208_H 1 + +#include <gconv.h> +#include <stdint.h> + +/* Conversion table. */ +extern const uint16_t __jis0208_to_ucs[]; + +extern const char __jisx0208_from_ucs4_lat1[256][2]; +extern const char __jisx0208_from_ucs4_greek[0xc1][2]; +extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[]; +extern const char __jisx0208_from_ucs_tab[][2]; + + +/* Struct for table with indeces in UCS mapping table. */ +struct jisx0208_ucs_idx +{ + uint16_t start; + uint16_t end; + uint16_t idx; +}; + + +static inline uint32_t +jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) +{ + unsigned char ch = *(*s); + unsigned char ch2; + int idx; + + if (ch < offset || (ch - offset) <= 0x20) + return __UNKNOWN_10646_CHAR; + + if (avail < 2) + return 0; + + ch2 = (*s)[1]; + if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) + return __UNKNOWN_10646_CHAR; + + idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset); + if (idx >= 0x1e80) + return __UNKNOWN_10646_CHAR; + + (*s) += 2; + + return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); +} + + +static inline size_t +ucs4_to_jisx0208 (uint32_t wch, char *s, size_t avail) +{ + unsigned int ch = (unsigned int) wch; + const char *cp; + + if (avail < 2) + return 0; + + if (ch < 0x100) + cp = __jisx0208_from_ucs4_lat1[ch]; + else if (ch >= 0x391 && ch <= 0x451) + cp = __jisx0208_from_ucs4_greek[ch - 0x391]; + else + { + const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx; + + if (ch >= 0xffff) + return __UNKNOWN_10646_CHAR; + while (ch > rp->end) + ++rp; + if (ch >= rp->start) + cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start]; + else + return __UNKNOWN_10646_CHAR; + } + + if (cp[0] == '\0') + return __UNKNOWN_10646_CHAR; + + s[0] = cp[0]; + s[1] = cp[1]; + + return 2; +} + +#endif /* jis0208.h */ |