kc3-lang/gnulib/lib/mbchar.h

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  Commit

• Hash : 6ca831b0
  Author :
  Date : 2025-09-16T18:57:41
  

  stringeq: prefer memeq to memcmp in other modules
  
  * lib/argmatch.c, lib/argmatch.h, lib/backupfile.c, lib/bcp47.c:
  * lib/boot-time.c, lib/csharpcomp.c, lib/csharpexec.c:
  * lib/file-has-acl.c, lib/gen-uni-tables.c, lib/get_ppid_of.c:
  * lib/get_progname_of.c, lib/getlogin_r.c, lib/getprogname.c:
  * lib/getumask.c, lib/isnan.c, lib/mbchar.h, lib/mem-hash-map.c:
  * lib/memcoll.c, lib/progname.c, lib/progreloc.c:
  * lib/pthread_sigmask.c, lib/quotearg.c, lib/readutmp.c:
  * lib/same.c, lib/signbitd.c, lib/signbitf.c, lib/signbitl.c:
  * lib/string-desc.c, lib/string.c, lib/string.in.h:
  * lib/unictype/3level.h, lib/unictype/3levelbit.h:
  * lib/uniname/uniname.c, lib/vc-mtime.c:
  Prefer memeq to memcmp when either will do.
  Do not make this change to files shared with glibc.
  Do not make the change to test files, at least not for now.
  * lib/gen-uni-tables.c (memeq): New static function, in same style.
  * modules/argmatch, modules/backupfile, modules/bcp47:
  * modules/boot-time, modules/csharpcomp, modules/csharpexec:
  * modules/file-has-acl:
  * modules/get_ppid_of, modules/get_progname_of:
  * modules/getlogin_r, modules/getprogname, modules/getumask:
  * modules/isnan, modules/mbchar, modules/mem-hash-map:
  * modules/memcoll, modules/progname, modules/pthread_sigmask:
  * modules/quotearg, modules/readutmp, modules/relocatable-prog:
  * modules/relocatable-prog-wrapper, modules/same, modules/signbit:
  * modules/string-desc, modules/stringeq, modules/uniname/uniname:
  * modules/vc-mtime:
  (Depends-on): Add stringeq.
  

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• lib/mbchar.h

• /* Multibyte character data type.
     Copyright (C) 2001, 2005-2007, 2009-2025 Free Software Foundation, Inc.
  
     This file 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.
  
     This file 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 <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>.  */
  
  /* A multibyte character is a short subsequence of a char* string,
     representing a single 32-bit wide character.
  
     We use multibyte characters instead of 32-bit 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.
  
     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.
       (Only available if the 'mbfile' module is in use.)
  
     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
  
  /* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE.  */
  #if !_GL_CONFIG_H_INCLUDED
   #error "Please include config.h first."
  #endif
  
  #include <string.h>
  #include <uchar.h>
  
  _GL_INLINE_HEADER_BEGIN
  #ifndef MBCHAR_INLINE
  # define MBCHAR_INLINE _GL_INLINE
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  /* The longest multibyte characters, nowadays, are 4 bytes long.
     Regardless of the values of MB_CUR_MAX and MB_LEN_MAX.  */
  #define MBCHAR_BUF_SIZE 4
  
  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 32-bit wide character */
    char32_t wc;          /* if wc_valid: the current character */
  #if defined GNULIB_MBFILE
    char buf[MBCHAR_BUF_SIZE]; /* room for the bytes, used for file input only */
  #endif
  };
  
  /* 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                                                   \
        ? _GL_CMP ((mbc1).wc, (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                                                   \
        ? _GL_CMP (c32tolower ((mbc1).wc), c32tolower ((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                                       \
       && memeq ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes))
  #define mb_caseequal(mbc1, mbc2) \
    ((mbc1).wc_valid && (mbc2).wc_valid                                   \
     ? c32tolower ((mbc1).wc) == c32tolower ((mbc2).wc)                   \
     : (mbc1).bytes == (mbc2).bytes                                       \
       && memeq ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes))
  
  /* <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 && c32isalnum ((mbc).wc))
  #define mb_isalpha(mbc) ((mbc).wc_valid && c32isalpha ((mbc).wc))
  #define mb_isblank(mbc) ((mbc).wc_valid && c32isblank ((mbc).wc))
  #define mb_iscntrl(mbc) ((mbc).wc_valid && c32iscntrl ((mbc).wc))
  #define mb_isdigit(mbc) ((mbc).wc_valid && c32isdigit ((mbc).wc))
  #define mb_isgraph(mbc) ((mbc).wc_valid && c32isgraph ((mbc).wc))
  #define mb_islower(mbc) ((mbc).wc_valid && c32islower ((mbc).wc))
  #define mb_isprint(mbc) ((mbc).wc_valid && c32isprint ((mbc).wc))
  #define mb_ispunct(mbc) ((mbc).wc_valid && c32ispunct ((mbc).wc))
  #define mb_isspace(mbc) ((mbc).wc_valid && c32isspace ((mbc).wc))
  #define mb_isupper(mbc) ((mbc).wc_valid && c32isupper ((mbc).wc))
  #define mb_isxdigit(mbc) ((mbc).wc_valid && c32isxdigit ((mbc).wc))
  
  /* Extra <wchar.h> function.  */
  
  /* Unprintable characters appear as a small box of width 1.  */
  #define MB_UNPRINTABLE_WIDTH 1
  
  MBCHAR_INLINE int
  mb_width_aux (char32_t wc)
  {
    int w = c32width (wc);
    /* For unprintable characters, arbitrarily return 0 for control characters
       and MB_UNPRINTABLE_WIDTH otherwise.  */
    return (w >= 0 ? w : c32iscntrl (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))
  
  #if defined GNULIB_MBFILE
  /* Assignment.  */
  MBCHAR_INLINE void
  mb_setascii (mbchar_t *mbc, char sc)
  {
    mbc->ptr = mbc->buf;
    mbc->bytes = 1;
    mbc->wc_valid = true;
    mbc->wc = mbc->buf[0] = sc;
  }
  #endif
  
  /* Copying a character.  */
  MBCHAR_INLINE void
  mb_copy (mbchar_t *new_mbc, const mbchar_t *old_mbc)
  {
  #if defined GNULIB_MBFILE
    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
  #endif
      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" or is one of '@', '$', and '`'
       which ISO C 23 § 5.2.1.1.(1) guarantees to be single-byte and in
       practice are safe to treat as basic in the execution character set,
       or
     - in the POSIX "portable character set", which
       <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap06.html>
       equally guarantees to be single-byte.
     This is a convenience function, and is in this file only to share code
     between mbiter.h, mbuiter.h, and mbfile.h.  */
  #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
      && ('$' == 36) && ('%' == 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) \
      && ('@' == 64) && ('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) \
      && ('`' == 96) && ('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
  
  /* All locale encodings (see localcharset.h) map the characters 0x00..0x7F
     to U+0000..U+007F, like ASCII, except for
       CP864      different mapping of '%'
       SHIFT_JIS  different mappings of 0x5C, 0x7E
       JOHAB      different mapping of 0x5C
     However, these characters in the range 0x20..0x7E are in the ISO C
     "basic character set" and in the POSIX "portable character set", which
     ISO C and POSIX guarantee to be single-byte.  Thus, locales with these
     encodings are not POSIX compliant.  And they are most likely not in use
     any more (as of 2023).  */
  # define is_basic(c) ((unsigned char) (c) < 0x80)
  
  #else
  
  MBCHAR_INLINE bool
  is_basic (char c)
  {
    switch (c)
      {
      case '\0':
      case '\007': case '\010':
      case '\t': case '\n': case '\v': case '\f': case '\r':
      case ' ': 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 '@':
      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 '`':
      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
  
  
  #ifdef __cplusplus
  }
  #endif
  
  _GL_INLINE_HEADER_END
  
  #endif /* _MBCHAR_H */
  

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