From a9a31b1de5776a3b08a82101a4fa711294f0dd1d Mon Sep 17 00:00:00 2001 From: "Manuel A. Fernandez Montecelo" Date: Fri, 27 May 2016 14:28:30 +0100 Subject: Imported Upstream version 0.9.6+really0.9.3 --- lib/unigbrk/ulc-grapheme-breaks.c | 130 -------------------------------------- 1 file changed, 130 deletions(-) delete mode 100644 lib/unigbrk/ulc-grapheme-breaks.c (limited to 'lib/unigbrk/ulc-grapheme-breaks.c') diff --git a/lib/unigbrk/ulc-grapheme-breaks.c b/lib/unigbrk/ulc-grapheme-breaks.c deleted file mode 100644 index d8bf924e..00000000 --- a/lib/unigbrk/ulc-grapheme-breaks.c +++ /dev/null @@ -1,130 +0,0 @@ -/* Grapheme cluster breaks function. - Copyright (C) 2001-2003, 2006-2015 Free Software Foundation, Inc. - Written by Ben Pfaff , 2010, - based on code written by Bruno Haible , 2009. - - This program 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 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 - 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 . */ - -#include - -/* Specification. */ -#include "unigbrk.h" - -#include -#include - -#include "c-ctype.h" -#include "c-strcaseeq.h" -#include "localcharset.h" -#include "uniconv.h" - -static int -is_utf8_encoding (const char *encoding) -{ - if (STRCASEEQ (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0)) - return 1; - return 0; -} - -#if C_CTYPE_ASCII -/* Assume that every ASCII character starts a new grapheme, which is often - true, except that CR-LF is a single grapheme. */ -static void -ascii_grapheme_breaks (const char *s, size_t n, char *p) -{ - size_t i; - - p[0] = 1; - for (i = 1; i < n; i++) - { - bool is_ascii = c_isprint (s[i]) || c_isspace (s[i]); - p[i] = is_ascii && (s[i] != '\n' || s[i - 1] != '\r'); - } -} -#endif - -/* Grapheme boundaries in a string in an arbitrary encoding. - - We convert the input string to Unicode. - - The standardized Unicode encodings are UTF-8, UCS-2, UCS-4, UTF-16, - UTF-16BE, UTF-16LE, UTF-7. UCS-2 supports only characters up to - \U0000FFFF. UTF-16 and variants support only characters up to - \U0010FFFF. UTF-7 is way too complex and not supported by glibc-2.1. - UCS-4 specification leaves doubts about endianness and byte order mark. - glibc currently interprets it as big endian without byte order mark, - but this is not backed by an RFC. So we use UTF-8. It supports - characters up to \U7FFFFFFF and is unambiguously defined. */ - -void -ulc_grapheme_breaks (const char *s, size_t n, char *p) -{ - if (n > 0) - { - const char *encoding = locale_charset (); - - if (is_utf8_encoding (encoding)) - u8_grapheme_breaks ((const uint8_t *) s, n, p); - else - { - /* Convert the string to UTF-8 and build a translation table - from offsets into s to offsets into the translated string. */ - size_t *offsets = (size_t *) malloc (n * sizeof (size_t)); - - if (offsets != NULL) - { - uint8_t *t; - size_t m; - - t = u8_conv_from_encoding (encoding, iconveh_question_mark, - s, n, offsets, NULL, &m); - if (t != NULL) - { - char *q = (char *) (m > 0 ? malloc (m) : NULL); - - if (m == 0 || q != NULL) - { - size_t i; - - /* Determine the grapheme breaks of the UTF-8 string. */ - u8_grapheme_breaks (t, m, q); - - /* Translate the result back to the original string. */ - memset (p, 0, n); - for (i = 0; i < n; i++) - if (offsets[i] != (size_t)(-1)) - p[i] = q[offsets[i]]; - - free (q); - free (t); - free (offsets); - return; - } - free (t); - } - free (offsets); - } - - /* Impossible to convert. */ -#if C_CTYPE_ASCII - /* Fall back to ASCII as best we can. */ - ascii_grapheme_breaks (s, n, p); -#else - /* We cannot make any assumptions. */ - p[0] = 1; - memset (p + 1, 0, n - 1); -#endif - } - } -} -- cgit v1.2.3