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Diffstat (limited to 'include/shmbutil.h')
| -rw-r--r-- | include/shmbutil.h | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/include/shmbutil.h b/include/shmbutil.h new file mode 100644 index 00000000..7fe2f8ea --- /dev/null +++ b/include/shmbutil.h @@ -0,0 +1,347 @@ +/* shmbutil.h -- utility functions for multibyte characters. */ + +/* Copyright (C) 2002 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash 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 2, or (at your option) any later + version. + + Bash 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 Bash; see the file COPYING. If not, write to the Free Software + Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +#if !defined (_SH_MBUTIL_H_) +#define _SH_MBUTIL_H_ + +#include "stdc.h" + +/************************************************/ +/* check multibyte capability for I18N code */ +/************************************************/ + +/* For platforms which support the ISO C amendement 1 functionality we + support user defined character classes. */ + /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */ +#if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H) +# include <wchar.h> +# include <wctype.h> +# if defined (HAVE_MBSRTOWCS) /* system is supposed to support XPG5 */ +# define HANDLE_MULTIBYTE 1 +# endif +#endif /* HAVE_WCTYPE_H && HAVE_WCHAR_H */ + +/* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */ +#if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T) +# define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0) +# define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0) +# define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0) +# define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0) +# define mbrlen(s, n, ps) (mbrlen) (s, n, 0) +# define mbstate_t int +#endif /* HANDLE_MULTIBYTE && !HAVE_MBSTATE_T */ + +/* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to + handle multibyte chars (some systems define MB_LEN_MAX as 1) */ +#ifdef HANDLE_MULTIBYTE +# include <limits.h> +# if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) +# undef MB_LEN_MAX +# endif +# if !defined (MB_LEN_MAX) +# define MB_LEN_MAX 16 +# endif +#endif /* HANDLE_MULTIBYTE */ + +/************************************************/ +/* end of multibyte capability checks for I18N */ +/************************************************/ + +#if defined (HANDLE_MULTIBYTE) + +extern size_t xmbsrtowcs __P((wchar_t *, const char **, size_t, mbstate_t *)); + +extern char *xstrchr __P((const char *, int)); + +#else /* !HANDLE_MULTIBYTE */ + +#undef MB_LEN_MAX +#undef MB_CUR_MAX + +#define MB_LEN_MAX 1 +#define MB_CUR_MAX 1 + +#undef xstrchr +#define xstrchr(s, c) strchr(s, c) + +#endif /* !HANDLE_MULTIBYTE */ + +/* Declare and initialize a multibyte state. Call must be terminated + with `;'. */ +#if defined (HANDLE_MULTIBYTE) +# define DECLARE_MBSTATE \ + mbstate_t state; \ + memset (&state, '\0', sizeof (mbstate_t)) +#else +# define DECLARE_MBSTATE +#endif /* !HANDLE_MULTIBYTE */ + +/* Initialize or reinitialize a multibyte state named `state'. Call must be + terminated with `;'. */ +#if defined (HANDLE_MULTIBYTE) +# define INITIALIZE_MBSTATE memset (&state, '\0', sizeof (mbstate_t)) +#else +# define INITIALIZE_MBSTATE +#endif /* !HANDLE_MULTIBYTE */ + +/* Advance one (possibly multi-byte) character in string _STR of length + _STRSIZE, starting at index _I. STATE must have already been declared. */ +#if defined (HANDLE_MULTIBYTE) +# define ADVANCE_CHAR(_str, _strsize, _i) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ +\ + state_bak = state; \ + mblength = mbrlen ((_str) + (_i), (_strsize) - (_i), &state); \ +\ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + (_i)++; \ + } \ + else \ + (_i) += mblength; \ + } \ + else \ + (_i)++; \ + } \ + while (0) +#else +# define ADVANCE_CHAR(_str, _strsize, _i) (_i)++ +#endif /* !HANDLE_MULTIBYTE */ + +/* Advance one (possibly multibyte) character in the string _STR of length + _STRSIZE. + SPECIAL: assume that _STR will be incremented by 1 after this call. */ +#if defined (HANDLE_MULTIBYTE) +# define ADVANCE_CHAR_P(_str, _strsize) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ +\ + state_bak = state; \ + mblength = mbrlen ((_str), (_strsize), &state); \ +\ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + else \ + (_str) += (mblength < 1) ? 0 : (mblength - 1); \ + } \ + } \ + while (0) +#else +# define ADVANCE_CHAR_P(_str, _strsize) +#endif /* !HANDLE_MULTIBYTE */ + +/* Copy a single character from the string _SRC to the string _DST. + _SRCEND is a pointer to the end of _SRC. */ +#if defined (HANDLE_MULTIBYTE) +# define COPY_CHAR_P(_dst, _src, _srcend) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ + int _k; \ +\ + state_bak = state; \ + mblength = mbrlen ((_src), (_srcend) - (_src), &state); \ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + else \ + mblength = (mblength < 1) ? 1 : mblength; \ +\ + for (_k = 0; _k < mblength; _k++) \ + *(_dst)++ = *(_src)++; \ + } \ + else \ + *(_dst)++ = *(_src)++; \ + } \ + while (0) +#else +# define COPY_CHAR_P(_dst, _src, _srcend) *(_dst)++ = *(_src)++ +#endif /* !HANDLE_MULTIBYTE */ + +/* Copy a single character from the string _SRC at index _SI to the string + _DST at index _DI. _SRCEND is a pointer to the end of _SRC. */ +#if defined (HANDLE_MULTIBYTE) +# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ + int _k; \ +\ + state_bak = state; \ + mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src)+(_si)), &state); \ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + else \ + mblength = (mblength < 1) ? 1 : mblength; \ +\ + for (_k = 0; _k < mblength; _k++) \ + _dst[_di++] = _src[_si++]; \ + } \ + else \ + _dst[_di++] = _src[_si++]; \ + } \ + while (0) +#else +# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) _dst[_di++] = _src[_si++] +#endif /* !HANDLE_MULTIBYTE */ + +/**************************************************************** + * * + * The following are only guaranteed to work in subst.c * + * * + ****************************************************************/ + +#if defined (HANDLE_MULTIBYTE) +# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ + int _i; \ +\ + state_bak = state; \ + mblength = mbrlen ((_src) + (_si), (_slen) - (_si), &state); \ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + else \ + mblength = (mblength < 1) ? 1 : mblength; \ +\ + temp = xmalloc (mblength + 2); \ + temp[0] = _escchar; \ + for (_i = 0; _i < mblength; _i++) \ + temp[_i + 1] = _src[_si++]; \ + temp[mblength + 1] = '\0'; \ +\ + goto add_string; \ + } \ + else \ + { \ + _dst[0] = _escchar; \ + _dst[1] = _sc; \ + } \ + } \ + while (0) +#else +# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \ + _dst[0] = _escchar; \ + _dst[1] = _sc +#endif /* !HANDLE_MULTIBYTE */ + +#if defined (HANDLE_MULTIBYTE) +# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + mbstate_t state_bak; \ + size_t mblength; \ +\ + state_bak = state; \ + mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src) + (_si)), &state); \ + if (mblength == (size_t)-2 || mblength == (size_t)-1) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + else \ + mblength = (mblength < 1) ? 1 : mblength; \ +\ + FASTCOPY(((_src) + (_si)), (_dst), mblength); \ +\ + (_dst) += mblength; \ + (_si) += mblength; \ + } \ + else \ + { \ + *(_dst)++ = _src[(_si)]; \ + (_si)++; \ + } \ + } \ + while (0) +#else +# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \ + *(_dst)++ = _src[(_si)]; \ + (_si)++ +#endif /* !HANDLE_MULTIBYTE */ + +#if HANDLE_MULTIBYTE +# define SADD_MBCHAR(_dst, _src, _si, _srcsize) \ + do \ + { \ + if (MB_CUR_MAX > 1) \ + { \ + int i; \ + mbstate_t state_bak; \ + size_t mblength; \ +\ + state_bak = state; \ + mblength = mbrlen ((_src) + (_si), (_srcsize) - (_si), &state); \ + if (mblength == (size_t)-1 || mblength == (size_t)-2) \ + { \ + state = state_bak; \ + mblength = 1; \ + } \ + if (mblength < 1) \ + mblength = 1; \ +\ + _dst = (char *)xmalloc (mblength + 1); \ + for (i = 0; i < mblength; i++) \ + (_dst)[i] = (_src)[(_si)++]; \ + (_dst)[mblength] = '\0'; \ +\ + goto add_string; \ + } \ + } \ + while (0) + +#else +# define SADD_MBCHAR(_dst, _src, _si, _srcsize) +#endif + +#endif /* _SH_MBUTIL_H_ */ |