Mercurial > hg > octave-nkf > gnulib-hg
changeset 7819:cfb404074993
New modules 'unistr/u8-mblen', 'unistr/u16-mblen', 'unistr/u32-mblen'.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 09 Jan 2007 14:08:57 +0000 |
parents | f0a55d4b260b |
children | fde3215f68e3 |
files | lib/unistr/u16-mblen.c lib/unistr/u32-mblen.c lib/unistr/u8-mblen.c modules/unistr/u16-mblen modules/unistr/u32-mblen modules/unistr/u8-mblen |
diffstat | 6 files changed, 259 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/lib/unistr/u16-mblen.c @@ -0,0 +1,51 @@ +/* Look at first character in UTF-16 string. + Copyright (C) 1999-2000, 2002, 2006-2007 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2002. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU Library General Public License as published + by the Free Software Foundation; either version 2, 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + USA. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +int +u16_mblen (const uint16_t *s, size_t n) +{ + if (n > 0) + { + /* Keep in sync with utf16-ucs4.h and utf16-ucs4.c. */ + uint16_t c = *s; + + if (c < 0xd800 || c >= 0xe000) + return (c != 0 ? 1 : 0); +#if CONFIG_UNICODE_SAFETY + if (c < 0xdc00) + { + if (n >= 2 + && s[1] >= 0xdc00 && s[1] < 0xe000) + return 2; + } +#else + { + if (n >= 2) + return 2; + } +#endif + } + /* invalid or incomplete multibyte character */ + return -1; +}
new file mode 100644 --- /dev/null +++ b/lib/unistr/u32-mblen.c @@ -0,0 +1,39 @@ +/* Look at first character in UTF-32 string. + Copyright (C) 2002, 2006-2007 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2002. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU Library General Public License as published + by the Free Software Foundation; either version 2, 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + USA. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +int +u32_mblen (const uint32_t *s, size_t n) +{ + if (n > 0) + { + uint32_t c = *s; + +#if CONFIG_UNICODE_SAFETY + if (c < 0xd800 || (c >= 0xe000 && c < 0x110000)) +#endif + return (c != 0 ? 1 : 0); + } + /* invalid or incomplete multibyte character */ + return -1; +}
new file mode 100644 --- /dev/null +++ b/lib/unistr/u8-mblen.c @@ -0,0 +1,100 @@ +/* Look at first character in UTF-8 string. + Copyright (C) 1999-2000, 2002, 2006-2007 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2002. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU Library General Public License as published + by the Free Software Foundation; either version 2, 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + USA. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +int +u8_mblen (const uint8_t *s, size_t n) +{ + if (n > 0) + { + /* Keep in sync with utf8-ucs4.h and utf8-ucs4.c. */ + uint8_t c = *s; + + if (c < 0x80) + return (c != 0 ? 1 : 0); + if (c >= 0xc2) + { + if (c < 0xe0) + { + if (n >= 2 +#if CONFIG_UNICODE_SAFETY + && (s[1] ^ 0x80) < 0x40 +#endif + ) + return 2; + } + else if (c < 0xf0) + { + if (n >= 3 +#if CONFIG_UNICODE_SAFETY + && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (c >= 0xe1 || s[1] >= 0xa0) + && (c != 0xed || s[1] < 0xa0) +#endif + ) + return 3; + } + else if (c < 0xf8) + { + if (n >= 4 +#if CONFIG_UNICODE_SAFETY + && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 + && (c >= 0xf1 || s[1] >= 0x90) +#if 1 + && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90)) +#endif +#endif + ) + return 4; + } +#if 0 + else if (c < 0xfc) + { + if (n >= 5 +#if CONFIG_UNICODE_SAFETY + && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40 + && (c >= 0xf9 || s[1] >= 0x88) +#endif + ) + return 5; + } + else if (c < 0xfe) + { + if (n >= 6 +#if CONFIG_UNICODE_SAFETY + && (s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40 + && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40 + && (s[5] ^ 0x80) < 0x40 + && (c >= 0xfd || s[1] >= 0x84) +#endif + ) + return 6; + } +#endif + } + } + /* invalid or incomplete multibyte character */ + return -1; +}
new file mode 100644 --- /dev/null +++ b/modules/unistr/u16-mblen @@ -0,0 +1,23 @@ +Description: +Look at first character in UTF-16 string. + +Files: +lib/unistr/u16-mblen.c + +Depends-on: +unistr/base + +configure.ac: + +Makefile.am: +lib_SOURCES += unistr/u16-mblen.c + +Include: +"unistr.h" + +License: +LGPL + +Maintainer: +Bruno Haible +
new file mode 100644 --- /dev/null +++ b/modules/unistr/u32-mblen @@ -0,0 +1,23 @@ +Description: +Look at first character in UTF-32 string. + +Files: +lib/unistr/u32-mblen.c + +Depends-on: +unistr/base + +configure.ac: + +Makefile.am: +lib_SOURCES += unistr/u32-mblen.c + +Include: +"unistr.h" + +License: +LGPL + +Maintainer: +Bruno Haible +
new file mode 100644 --- /dev/null +++ b/modules/unistr/u8-mblen @@ -0,0 +1,23 @@ +Description: +Look at first character in UTF-8 string. + +Files: +lib/unistr/u8-mblen.c + +Depends-on: +unistr/base + +configure.ac: + +Makefile.am: +lib_SOURCES += unistr/u8-mblen.c + +Include: +"unistr.h" + +License: +LGPL + +Maintainer: +Bruno Haible +