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-/* Multibyte character data type.
- Copyright (C) 2001, 2005-2006 Free Software Foundation, Inc.
-
- This program 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.
-
- 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* Written by Bruno Haible <bruno@clisp.org>. */
-
-/* A multibyte character is a short subsequence of a char* string,
- representing a single wide character.
-
- We use multibyte characters instead of wide characters because of
- the following goals:
- 1) correct multibyte handling, i.e. operate according to the LC_CTYPE
- locale,
- 2) ease of maintenance, i.e. the maintainer needs not know all details
- of the ISO C 99 standard,
- 3) don't fail grossly if the input is not in the encoding set by the
- locale, because often different encodings are in use in the same
- countries (ISO-8859-1/UTF-8, EUC-JP/Shift_JIS, ...),
- 4) fast in the case of ASCII characters,
- 5) portability, i.e. don't make unportable assumptions about wchar_t.
-
- Multibyte characters are only accessed through the mb* macros.
-
- mb_ptr (mbc)
- return a pointer to the beginning of the multibyte sequence.
-
- mb_len (mbc)
- returns the number of bytes occupied by the multibyte sequence.
- Always > 0.
-
- mb_iseq (mbc, sc)
- returns true if mbc is the standard ASCII character sc.
-
- mb_isnul (mbc)
- returns true if mbc is the nul character.
-
- mb_cmp (mbc1, mbc2)
- returns a positive, zero, or negative value depending on whether mbc1
- sorts after, same or before mbc2.
-
- mb_casecmp (mbc1, mbc2)
- returns a positive, zero, or negative value depending on whether mbc1
- sorts after, same or before mbc2, modulo upper/lowercase conversion.
-
- mb_equal (mbc1, mbc2)
- returns true if mbc1 and mbc2 are equal.
-
- mb_caseequal (mbc1, mbc2)
- returns true if mbc1 and mbc2 are equal modulo upper/lowercase conversion.
-
- mb_isalnum (mbc)
- returns true if mbc is alphanumeric.
-
- mb_isalpha (mbc)
- returns true if mbc is alphabetic.
-
- mb_isascii(mbc)
- returns true if mbc is plain ASCII.
-
- mb_isblank (mbc)
- returns true if mbc is a blank.
-
- mb_iscntrl (mbc)
- returns true if mbc is a control character.
-
- mb_isdigit (mbc)
- returns true if mbc is a decimal digit.
-
- mb_isgraph (mbc)
- returns true if mbc is a graphic character.
-
- mb_islower (mbc)
- returns true if mbc is lowercase.
-
- mb_isprint (mbc)
- returns true if mbc is a printable character.
-
- mb_ispunct (mbc)
- returns true if mbc is a punctuation character.
-
- mb_isspace (mbc)
- returns true if mbc is a space character.
-
- mb_isupper (mbc)
- returns true if mbc is uppercase.
-
- mb_isxdigit (mbc)
- returns true if mbc is a hexadecimal digit.
-
- mb_width (mbc)
- returns the number of columns on the output device occupied by mbc.
- Always >= 0.
-
- mb_putc (mbc, stream)
- outputs mbc on stream, a byte oriented FILE stream opened for output.
-
- mb_setascii (&mbc, sc)
- assigns the standard ASCII character sc to mbc.
-
- mb_copy (&destmbc, &srcmbc)
- copies srcmbc to destmbc.
-
- Here are the function prototypes of the macros.
-
- extern const char * mb_ptr (const mbchar_t mbc);
- extern size_t mb_len (const mbchar_t mbc);
- extern bool mb_iseq (const mbchar_t mbc, char sc);
- extern bool mb_isnul (const mbchar_t mbc);
- extern int mb_cmp (const mbchar_t mbc1, const mbchar_t mbc2);
- extern int mb_casecmp (const mbchar_t mbc1, const mbchar_t mbc2);
- extern bool mb_equal (const mbchar_t mbc1, const mbchar_t mbc2);
- extern bool mb_caseequal (const mbchar_t mbc1, const mbchar_t mbc2);
- extern bool mb_isalnum (const mbchar_t mbc);
- extern bool mb_isalpha (const mbchar_t mbc);
- extern bool mb_isascii (const mbchar_t mbc);
- extern bool mb_isblank (const mbchar_t mbc);
- extern bool mb_iscntrl (const mbchar_t mbc);
- extern bool mb_isdigit (const mbchar_t mbc);
- extern bool mb_isgraph (const mbchar_t mbc);
- extern bool mb_islower (const mbchar_t mbc);
- extern bool mb_isprint (const mbchar_t mbc);
- extern bool mb_ispunct (const mbchar_t mbc);
- extern bool mb_isspace (const mbchar_t mbc);
- extern bool mb_isupper (const mbchar_t mbc);
- extern bool mb_isxdigit (const mbchar_t mbc);
- extern int mb_width (const mbchar_t mbc);
- extern void mb_putc (const mbchar_t mbc, FILE *stream);
- extern void mb_setascii (mbchar_t *new, char sc);
- extern void mb_copy (mbchar_t *new, const mbchar_t *old);
- */
-
-#ifndef _MBCHAR_H
-#define _MBCHAR_H 1
-
-#include <stdbool.h>
-#include <string.h>
-
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
- <wchar.h>.
- BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
- <wchar.h>. */
-#include <stdio.h>
-#include <time.h>
-#include <wchar.h>
-
-#include <wctype.h>
-/* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
- Assume all 12 functions are implemented the same way, or not at all. */
-#if !defined iswalnum && !HAVE_ISWCNTRL
-static inline int
-iswalnum (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')
- : 0);
-}
-# define iswalnum iswalnum
-#endif
-#if !defined iswalpha && !HAVE_ISWCNTRL
-static inline int
-iswalpha (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'
- : 0);
-}
-# define iswalpha iswalpha
-#endif
-#if !defined iswblank && !HAVE_ISWCNTRL
-static inline int
-iswblank (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc == ' ' || wc == '\t'
- : 0);
-}
-# define iswblank iswblank
-#endif
-#if !defined iswcntrl && !HAVE_ISWCNTRL
-static inline int
-iswcntrl (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? (wc & ~0x1f) == 0 || wc == 0x7f
- : 0);
-}
-# define iswcntrl iswcntrl
-#endif
-#if !defined iswdigit && !HAVE_ISWCNTRL
-static inline int
-iswdigit (wint_t wc)
-{
- return (wc >= '0' && wc <= '9');
-}
-# define iswdigit iswdigit
-#endif
-#if !defined iswgraph && !HAVE_ISWCNTRL
-static inline int
-iswgraph (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc >= '!' && wc <= '~'
- : 1);
-}
-# define iswgraph iswgraph
-#endif
-#if !defined iswlower && !HAVE_ISWCNTRL
-static inline int
-iswlower (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc >= 'a' && wc <= 'z'
- : 0);
-}
-# define iswlower iswlower
-#endif
-#if !defined iswprint && !HAVE_ISWCNTRL
-static inline int
-iswprint (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc >= ' ' && wc <= '~'
- : 1);
-}
-# define iswprint iswprint
-#endif
-#if !defined iswpunct && !HAVE_ISWCNTRL
-static inline int
-iswpunct (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc >= '!' && wc <= '~'
- && !((wc >= '0' && wc <= '9')
- || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'))
- : 1);
-}
-# define iswpunct iswpunct
-#endif
-#if !defined iswspace && !HAVE_ISWCNTRL
-static inline int
-iswspace (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc == ' ' || wc == '\t'
- || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r'
- : 0);
-}
-# define iswspace iswspace
-#endif
-#if !defined iswupper && !HAVE_ISWCNTRL
-static inline int
-iswupper (wint_t wc)
-{
- return (wc >= 0 && wc < 128
- ? wc >= 'A' && wc <= 'Z'
- : 0);
-}
-# define iswupper iswupper
-#endif
-#if !defined iswxdigit && !HAVE_ISWCNTRL
-static inline int
-iswxdigit (wint_t wc)
-{
- return (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F');
-}
-# define iswxdigit iswxdigit
-#endif
-
-#include "wcwidth.h"
-
-#define MBCHAR_BUF_SIZE 24
-
-struct mbchar
-{
- const char *ptr; /* pointer to current character */
- size_t bytes; /* number of bytes of current character, > 0 */
- bool wc_valid; /* true if wc is a valid wide character */
- wchar_t wc; /* if wc_valid: the current character */
- char buf[MBCHAR_BUF_SIZE]; /* room for the bytes, used for file input only */
-};
-
-/* EOF (not a real character) is represented with bytes = 0 and
- wc_valid = false. */
-
-typedef struct mbchar mbchar_t;
-
-/* Access the current character. */
-#define mb_ptr(mbc) ((mbc).ptr)
-#define mb_len(mbc) ((mbc).bytes)
-
-/* Comparison of characters. */
-#define mb_iseq(mbc, sc) ((mbc).wc_valid && (mbc).wc == (sc))
-#define mb_isnul(mbc) ((mbc).wc_valid && (mbc).wc == 0)
-#define mb_cmp(mbc1, mbc2) \
- ((mbc1).wc_valid \
- ? ((mbc2).wc_valid \
- ? (int) (mbc1).wc - (int) (mbc2).wc \
- : -1) \
- : ((mbc2).wc_valid \
- ? 1 \
- : (mbc1).bytes == (mbc2).bytes \
- ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
- : (mbc1).bytes < (mbc2).bytes \
- ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
- : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
-#define mb_casecmp(mbc1, mbc2) \
- ((mbc1).wc_valid \
- ? ((mbc2).wc_valid \
- ? (int) towlower ((mbc1).wc) - (int) towlower ((mbc2).wc) \
- : -1) \
- : ((mbc2).wc_valid \
- ? 1 \
- : (mbc1).bytes == (mbc2).bytes \
- ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
- : (mbc1).bytes < (mbc2).bytes \
- ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
- : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
-#define mb_equal(mbc1, mbc2) \
- ((mbc1).wc_valid && (mbc2).wc_valid \
- ? (mbc1).wc == (mbc2).wc \
- : (mbc1).bytes == (mbc2).bytes \
- && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
-#define mb_caseequal(mbc1, mbc2) \
- ((mbc1).wc_valid && (mbc2).wc_valid \
- ? towlower ((mbc1).wc) == towlower ((mbc2).wc) \
- : (mbc1).bytes == (mbc2).bytes \
- && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
-
-/* <ctype.h>, <wctype.h> classification. */
-#define mb_isascii(mbc) \
- ((mbc).wc_valid && (mbc).wc >= 0 && (mbc).wc <= 127)
-#define mb_isalnum(mbc) ((mbc).wc_valid && iswalnum ((mbc).wc))
-#define mb_isalpha(mbc) ((mbc).wc_valid && iswalpha ((mbc).wc))
-#define mb_isblank(mbc) ((mbc).wc_valid && iswblank ((mbc).wc))
-#define mb_iscntrl(mbc) ((mbc).wc_valid && iswcntrl ((mbc).wc))
-#define mb_isdigit(mbc) ((mbc).wc_valid && iswdigit ((mbc).wc))
-#define mb_isgraph(mbc) ((mbc).wc_valid && iswgraph ((mbc).wc))
-#define mb_islower(mbc) ((mbc).wc_valid && iswlower ((mbc).wc))
-#define mb_isprint(mbc) ((mbc).wc_valid && iswprint ((mbc).wc))
-#define mb_ispunct(mbc) ((mbc).wc_valid && iswpunct ((mbc).wc))
-#define mb_isspace(mbc) ((mbc).wc_valid && iswspace ((mbc).wc))
-#define mb_isupper(mbc) ((mbc).wc_valid && iswupper ((mbc).wc))
-#define mb_isxdigit(mbc) ((mbc).wc_valid && iswxdigit ((mbc).wc))
-
-/* Extra <wchar.h> function. */
-
-/* Unprintable characters appear as a small box of width 1. */
-#define MB_UNPRINTABLE_WIDTH 1
-
-static inline int
-mb_width_aux (wint_t wc)
-{
- int w = wcwidth (wc);
- /* For unprintable characters, arbitrarily return 0 for control characters
- and MB_UNPRINTABLE_WIDTH otherwise. */
- return (w >= 0 ? w : iswcntrl (wc) ? 0 : MB_UNPRINTABLE_WIDTH);
-}
-
-#define mb_width(mbc) \
- ((mbc).wc_valid ? mb_width_aux ((mbc).wc) : MB_UNPRINTABLE_WIDTH)
-
-/* Output. */
-#define mb_putc(mbc, stream) fwrite ((mbc).ptr, 1, (mbc).bytes, (stream))
-
-/* Assignment. */
-#define mb_setascii(mbc, sc) \
- ((mbc)->ptr = (mbc)->buf, (mbc)->bytes = 1, (mbc)->wc_valid = 1, \
- (mbc)->wc = (mbc)->buf[0] = (sc))
-
-/* Copying a character. */
-static inline void
-mb_copy (mbchar_t *new, const mbchar_t *old)
-{
- if (old->ptr == &old->buf[0])
- {
- memcpy (&new->buf[0], &old->buf[0], old->bytes);
- new->ptr = &new->buf[0];
- }
- else
- new->ptr = old->ptr;
- new->bytes = old->bytes;
- if ((new->wc_valid = old->wc_valid))
- new->wc = old->wc;
-}
-
-
-/* is_basic(c) tests whether the single-byte character c is in the
- ISO C "basic character set".
- This is a convenience function, and is in this file only to share code
- between mbiter_multi.h and mbfile_multi.h. */
-#if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
- && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
- && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
- && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
- && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
- && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
- && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
- && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
- && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
- && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
- && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
- && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
- && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
- && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
- && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
- && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
- && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
- && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
- && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
- && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
- && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
- && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
- && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
-/* The character set is ISO-646, not EBCDIC. */
-# define IS_BASIC_ASCII 1
-
-extern unsigned int is_basic_table[];
-
-static inline bool
-is_basic (char c)
-{
- return (is_basic_table [(unsigned char) c >> 5] >> ((unsigned char) c & 31))
- & 1;
-}
-
-#else
-
-static inline bool
-is_basic (char c)
-{
- switch (c)
- {
- case '\t': case '\v': case '\f':
- case ' ': case '!': case '"': case '#': case '%':
- case '&': case '\'': case '(': case ')': case '*':
- case '+': case ',': case '-': case '.': case '/':
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- case ':': case ';': case '<': case '=': case '>':
- case '?':
- case 'A': case 'B': case 'C': case 'D': case 'E':
- case 'F': case 'G': case 'H': case 'I': case 'J':
- case 'K': case 'L': case 'M': case 'N': case 'O':
- case 'P': case 'Q': case 'R': case 'S': case 'T':
- case 'U': case 'V': case 'W': case 'X': case 'Y':
- case 'Z':
- case '[': case '\\': case ']': case '^': case '_':
- case 'a': case 'b': case 'c': case 'd': case 'e':
- case 'f': case 'g': case 'h': case 'i': case 'j':
- case 'k': case 'l': case 'm': case 'n': case 'o':
- case 'p': case 'q': case 'r': case 's': case 't':
- case 'u': case 'v': case 'w': case 'x': case 'y':
- case 'z': case '{': case '|': case '}': case '~':
- return 1;
- default:
- return 0;
- }
-}
-
-#endif
-
-#endif /* _MBCHAR_H */
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