--- /dev/null
+/* 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;
+}
--- /dev/null
+/* 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;
+}
--- /dev/null
+/* 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;
+}
--- /dev/null
+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
+
--- /dev/null
+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
+
--- /dev/null
+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
+
projects / gnulib.git / commitdiff