| /* Multibyte character data type. |
| Copyright (C) 2001, 2005-2007, 2009-2012 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 3 of the License, 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, see <http://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 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> |
| |
| _GL_INLINE_HEADER_BEGIN |
| #ifndef MBCHAR_INLINE |
| # define MBCHAR_INLINE _GL_INLINE |
| #endif |
| |
| #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 |
| |
| MBCHAR_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. */ |
| MBCHAR_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". |
| 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 const unsigned int is_basic_table[]; |
| |
| MBCHAR_INLINE bool |
| is_basic (char c) |
| { |
| return (is_basic_table [(unsigned char) c >> 5] >> ((unsigned char) c & 31)) |
| & 1; |
| } |
| |
| #else |
| |
| MBCHAR_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 |
| |
| _GL_INLINE_HEADER_END |
| |
| #endif /* _MBCHAR_H */ |
