/* 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.
-
- typedef int bool;
- 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 _SHMBCHAR_H
#define _SHMBCHAR_H 1
#include <wchar.h>
#include <wctype.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 */
- int 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_mbc, const mbchar_t *old_mbc)
-{
- if (old_mbc->ptr == &old_mbc->buf[0])
- {
- memcpy (&new_mbc->buf[0], &old_mbc->buf[0], old_mbc->bytes);
- new_mbc->ptr = &new_mbc->buf[0];
- }
- else
- new_mbc->ptr = old_mbc->ptr;
- new_mbc->bytes = old_mbc->bytes;
- if ((new_mbc->wc_valid = old_mbc->wc_valid))
- new_mbc->wc = old_mbc->wc;
-}
-
/* is_basic(c) tests whether the single-byte character c is in the
ISO C "basic character set".
projects / thirdparty / bash.git / blobdiff