+++ /dev/null
-/* mbutil.c -- readline multibyte character utility functions */
-
-/* Copyright (C) 2001-2017 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline 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.
-
- Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#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
-
-/* Ditto */
-int _rl_utf8locale = 0;
-
-/* **************************************************************** */
-/* */
-/* Multibyte Character Utility Functions */
-/* */
-/* **************************************************************** */
-
-#if defined(HANDLE_MULTIBYTE)
-
-/* **************************************************************** */
-/* */
-/* UTF-8 specific Character Utility Functions */
-/* */
-/* **************************************************************** */
-
-/* Return the length in bytes of the possibly-multibyte character beginning
- at S. Encoding is UTF-8. */
-static int
-_rl_utf8_mblen (const char *s, size_t n)
-{
- unsigned char c, c1;
-
- if (s == 0)
- return (0); /* no shift states */
- if (n <= 0)
- return (-1);
-
- c = (unsigned char)*s;
- if (c < 0x80)
- return (c != 0);
- if (c >= 0xc2)
- {
- c1 = (unsigned char)s[1];
- if (c < 0xe0)
- {
- if (n >= 2 && (s[1] ^ 0x80) < 0x40)
- return 2;
- }
- else if (c < 0xf0)
- {
- if (n >= 3
- && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
- && (c >= 0xe1 || c1 >= 0xa0)
- && (c != 0xed || c1 < 0xa0))
- return 3;
- }
- else if (c < 0xf8)
- {
- if (n >= 4
- && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
- && (s[3] ^ 0x80) < 0x40
- && (c >= 0xf1 || c1 >= 0x90)
- && (c < 0xf4 || (c == 0xf4 && c1 < 0x90)))
- return 4;
- }
- }
- /* invalid or incomplete multibyte character */
- return -1;
-}
-
-static int
-_rl_find_next_mbchar_internal (char *string, int seed, int count, int find_non_zero)
-{
- size_t tmp, len;
- mbstate_t ps;
- int point;
- wchar_t wc;
-
- tmp = 0;
-
- 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 _rl_adjust_point returns -1, the character or string is invalid.
- treat as a byte. */
- if (point == seed - 1) /* invalid */
- return seed + 1;
-
- /* if this is true, means that seed was not pointing to a byte indicating
- the beginning of a multibyte character. Correct the point and consume
- one char. */
- if (seed < point)
- count--;
-
- while (count > 0)
- {
- len = strlen (string + point);
- if (len == 0)
- break;
- if (_rl_utf8locale && UTF8_SINGLEBYTE(string[point]))
- {
- tmp = 1;
- wc = (wchar_t) string[point];
- memset(&ps, 0, sizeof(mbstate_t));
- }
- else
- tmp = mbrtowc (&wc, string+point, len, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* invalid bytes. assume a byte represents a character */
- point++;
- count--;
- /* reset states. */
- memset(&ps, 0, sizeof(mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- break; /* found wide '\0' */
- 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 (MB_NULLWCH (tmp) == 0 && MB_INVALIDCH (tmp) == 0 && WCWIDTH (wc) == 0)
- {
- point += tmp;
- tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
- }
- }
-
- return point;
-}
-
-/*static*/ int
-_rl_find_prev_mbchar_internal (char *string, int seed, int 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)
- {
- if (_rl_utf8locale && UTF8_SINGLEBYTE(string[point]))
- {
- tmp = 1;
- wc = (wchar_t) string[point];
- memset(&ps, 0, sizeof(mbstate_t));
- }
- else
- tmp = mbrtowc (&wc, string + point, length - point, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* in this case, bytes are invalid or too short 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));
-
- /* Since we're assuming that this byte represents a single
- non-zero-width character, don't forget about it. */
- prev = point;
- }
- else if (MB_NULLWCH (tmp))
- 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 (char *src, mbstate_t *ps)
-{
- size_t tmp, l;
- int mb_cur_max;
-
- /* Look at no more than MB_CUR_MAX characters */
- l = (size_t)strlen (src);
- if (_rl_utf8locale && l > 0 && UTF8_SINGLEBYTE(*src))
- tmp = (*src != 0) ? 1 : 0;
- else
- {
- mb_cur_max = MB_CUR_MAX;
- tmp = mbrlen((const char *)src, (l < mb_cur_max) ? l : mb_cur_max, ps);
- }
- if (tmp == (size_t)(-2))
- {
- /* too short to compose multibyte char */
- if (ps)
- memset (ps, 0, sizeof(mbstate_t));
- return -2;
- }
- else if (tmp == (size_t)(-1))
- {
- /* invalid to compose multibyte char */
- /* initialize the conversion state */
- if (ps)
- 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 (char *buf1, int pos1, mbstate_t *ps1, char *buf2, int pos2, mbstate_t *ps2)
-{
- 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 invalid (point < 0 || more than string length),
- it returns -1 */
-int
-_rl_adjust_point (char *string, int point, mbstate_t *ps)
-{
- size_t tmp;
- int length, pos;
-
- tmp = 0;
- pos = 0;
- length = strlen(string);
- if (point < 0)
- return -1;
- if (length < point)
- return -1;
-
- while (pos < point)
- {
- if (_rl_utf8locale && UTF8_SINGLEBYTE(string[pos]))
- tmp = 1;
- else
- tmp = mbrlen (string + pos, length - pos, ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* in this case, bytes are invalid or too short 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 */
- if (ps)
- memset (ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- pos++;
- else
- pos += tmp;
- }
-
- return (pos - point);
-}
-
-int
-_rl_is_mbchar_matched (char *string, int seed, int 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;
-}
-
-wchar_t
-_rl_char_value (char *buf, int ind)
-{
- size_t tmp;
- wchar_t wc;
- mbstate_t ps;
- int l;
-
- if (MB_LEN_MAX == 1 || rl_byte_oriented)
- return ((wchar_t) buf[ind]);
- if (_rl_utf8locale && UTF8_SINGLEBYTE(buf[ind]))
- return ((wchar_t) buf[ind]);
- l = strlen (buf);
- if (ind >= l - 1)
- return ((wchar_t) buf[ind]);
- if (l < ind) /* Sanity check */
- l = strlen (buf+ind);
- memset (&ps, 0, sizeof (mbstate_t));
- tmp = mbrtowc (&wc, buf + ind, l - ind, &ps);
- if (MB_INVALIDCH (tmp) || MB_NULLWCH (tmp))
- return ((wchar_t) buf[ind]);
- return wc;
-}
-#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 (char *string, int seed, int count, int 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 (char *string, int seed, int flags)
-{
-#if defined (HANDLE_MULTIBYTE)
- return _rl_find_prev_mbchar_internal (string, seed, flags);
-#else
- return ((seed == 0) ? seed : seed - 1);
-#endif
-}
projects / deliverable / binutils-gdb.git / blobdiff