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-rw-r--r--readline-4.3/mbutil.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/readline-4.3/mbutil.c b/readline-4.3/mbutil.c
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index 50302f0..0000000
--- a/readline-4.3/mbutil.c
+++ /dev/null
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-/* mbutil.c -- readline multibyte character utility functions */
-
-/* Copyright (C) 2001 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library, a library for
- reading lines of text with interactive input and history editing.
-
- The GNU Readline Library 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.
-
- The GNU Readline Library 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.
-
- The GNU General Public License is often shipped with GNU software, and
- is generally kept in a file called COPYING or LICENSE. If you do not
- have a copy of the license, write to the Free Software Foundation,
- 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <fcntl.h>
-#include "posixjmp.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h> /* for _POSIX_VERSION */
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <stdio.h>
-#include <ctype.h>
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-#if defined (TIOCSTAT_IN_SYS_IOCTL)
-# include <sys/ioctl.h>
-#endif /* TIOCSTAT_IN_SYS_IOCTL */
-
-/* Some standard library routines. */
-#include "readline.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-
-/* Declared here so it can be shared between the readline and history
- libraries. */
-#if defined (HANDLE_MULTIBYTE)
-int rl_byte_oriented = 0;
-#else
-int rl_byte_oriented = 1;
-#endif
-
-/* **************************************************************** */
-/* */
-/* Multibyte Character Utility Functions */
-/* */
-/* **************************************************************** */
-
-#if defined(HANDLE_MULTIBYTE)
-
-static int
-_rl_find_next_mbchar_internal (string, seed, count, find_non_zero)
- char *string;
- int seed, count, find_non_zero;
-{
- size_t tmp = 0;
- mbstate_t ps;
- int point = 0;
- wchar_t wc;
-
- memset(&ps, 0, sizeof (mbstate_t));
- if (seed < 0)
- seed = 0;
- if (count <= 0)
- return seed;
-
- point = seed + _rl_adjust_point(string, seed, &ps);
- /* if this is true, means that seed was not pointed character
- started byte. So correct the point and consume count */
- if (seed < point)
- count --;
-
- while (count > 0)
- {
- tmp = mbrtowc (&wc, string+point, strlen(string + point), &ps);
- if ((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2)
- {
- /* invalid bytes. asume a byte represents a character */
- point++;
- count--;
- /* reset states. */
- memset(&ps, 0, sizeof(mbstate_t));
- }
- else if (tmp == (size_t)0)
- /* found '\0' char */
- break;
- else
- {
- /* valid bytes */
- point += tmp;
- if (find_non_zero)
- {
- if (wcwidth (wc) == 0)
- continue;
- else
- count--;
- }
- else
- count--;
- }
- }
-
- if (find_non_zero)
- {
- tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
- while (wcwidth (wc) == 0)
- {
- point += tmp;
- tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
- if (tmp == (size_t)(0) || tmp == (size_t)(-1) || tmp == (size_t)(-2))
- break;
- }
- }
- return point;
-}
-
-static int
-_rl_find_prev_mbchar_internal (string, seed, find_non_zero)
- char *string;
- int seed, find_non_zero;
-{
- mbstate_t ps;
- int prev, non_zero_prev, point, length;
- size_t tmp;
- wchar_t wc;
-
- memset(&ps, 0, sizeof(mbstate_t));
- length = strlen(string);
-
- if (seed < 0)
- return 0;
- else if (length < seed)
- return length;
-
- prev = non_zero_prev = point = 0;
- while (point < seed)
- {
- tmp = mbrtowc (&wc, string + point, length - point, &ps);
- if ((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2)
- {
- /* in this case, bytes are invalid or shorted to compose
- multibyte char, so assume that the first byte represents
- a single character anyway. */
- tmp = 1;
- /* clear the state of the byte sequence, because
- in this case effect of mbstate is undefined */
- memset(&ps, 0, sizeof (mbstate_t));
- }
- else if (tmp == 0)
- break; /* Found '\0' char. Can this happen? */
- else
- {
- if (find_non_zero)
- {
- if (wcwidth (wc) != 0)
- prev = point;
- }
- else
- prev = point;
- }
-
- point += tmp;
- }
-
- return prev;
-}
-
-/* return the number of bytes parsed from the multibyte sequence starting
- at src, if a non-L'\0' wide character was recognized. It returns 0,
- if a L'\0' wide character was recognized. It returns (size_t)(-1),
- if an invalid multibyte sequence was encountered. It returns (size_t)(-2)
- if it couldn't parse a complete multibyte character. */
-int
-_rl_get_char_len (src, ps)
- char *src;
- mbstate_t *ps;
-{
- size_t tmp;
-
- tmp = mbrlen((const char *)src, (size_t)strlen (src), ps);
- if (tmp == (size_t)(-2))
- {
- /* shorted to compose multibyte char */
- memset (ps, 0, sizeof(mbstate_t));
- return -2;
- }
- else if (tmp == (size_t)(-1))
- {
- /* invalid to compose multibyte char */
- /* initialize the conversion state */
- memset (ps, 0, sizeof(mbstate_t));
- return -1;
- }
- else if (tmp == (size_t)0)
- return 0;
- else
- return (int)tmp;
-}
-
-/* compare the specified two characters. If the characters matched,
- return 1. Otherwise return 0. */
-int
-_rl_compare_chars (buf1, pos1, ps1, buf2, pos2, ps2)
- char *buf1, *buf2;
- mbstate_t *ps1, *ps2;
- int pos1, pos2;
-{
- int i, w1, w2;
-
- if ((w1 = _rl_get_char_len (&buf1[pos1], ps1)) <= 0 ||
- (w2 = _rl_get_char_len (&buf2[pos2], ps2)) <= 0 ||
- (w1 != w2) ||
- (buf1[pos1] != buf2[pos2]))
- return 0;
-
- for (i = 1; i < w1; i++)
- if (buf1[pos1+i] != buf2[pos2+i])
- return 0;
-
- return 1;
-}
-
-/* adjust pointed byte and find mbstate of the point of string.
- adjusted point will be point <= adjusted_point, and returns
- differences of the byte(adjusted_point - point).
- if point is invalied (point < 0 || more than string length),
- it returns -1 */
-int
-_rl_adjust_point(string, point, ps)
- char *string;
- int point;
- mbstate_t *ps;
-{
- size_t tmp = 0;
- int length;
- int pos = 0;
-
- length = strlen(string);
- if (point < 0)
- return -1;
- if (length < point)
- return -1;
-
- while (pos < point)
- {
- tmp = mbrlen (string + pos, length - pos, ps);
- if((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2)
- {
- /* in this case, bytes are invalid or shorted to compose
- multibyte char, so assume that the first byte represents
- a single character anyway. */
- pos++;
- /* clear the state of the byte sequence, because
- in this case effect of mbstate is undefined */
- memset (ps, 0, sizeof (mbstate_t));
- }
- else
- pos += tmp;
- }
-
- return (pos - point);
-}
-
-int
-_rl_is_mbchar_matched (string, seed, end, mbchar, length)
- char *string;
- int seed, end;
- char *mbchar;
- int length;
-{
- int i;
-
- if ((end - seed) < length)
- return 0;
-
- for (i = 0; i < length; i++)
- if (string[seed + i] != mbchar[i])
- return 0;
- return 1;
-}
-#endif /* HANDLE_MULTIBYTE */
-
-/* Find next `count' characters started byte point of the specified seed.
- If flags is MB_FIND_NONZERO, we look for non-zero-width multibyte
- characters. */
-#undef _rl_find_next_mbchar
-int
-_rl_find_next_mbchar (string, seed, count, flags)
- char *string;
- int seed, count, flags;
-{
-#if defined (HANDLE_MULTIBYTE)
- return _rl_find_next_mbchar_internal (string, seed, count, flags);
-#else
- return (seed + count);
-#endif
-}
-
-/* Find previous character started byte point of the specified seed.
- Returned point will be point <= seed. If flags is MB_FIND_NONZERO,
- we look for non-zero-width multibyte characters. */
-#undef _rl_find_prev_mbchar
-int
-_rl_find_prev_mbchar (string, seed, flags)
- char *string;
- int seed, flags;
-{
-#if defined (HANDLE_MULTIBYTE)
- return _rl_find_prev_mbchar_internal (string, seed, flags);
-#else
- return ((seed == 0) ? seed : seed - 1);
-#endif
-}
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