/* Look at first character in UTF-8 string.
- Copyright (C) 1999-2002, 2006-2007 Free Software Foundation, Inc.
+ Copyright (C) 1999-2002, 2006-2007, 2009-2014 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2001.
- 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 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
- Library General Public License for more details.
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
+#if defined IN_LIBUNISTRING
+/* Tell unistr.h to declare u8_mbtouc_unsafe as 'extern', not
+ 'static inline'. */
+# include "unistring-notinline.h"
+#endif
+
/* Specification. */
#include "unistr.h"
else if (c >= 0xc2)
{
if (c < 0xe0)
- {
- if (n >= 2)
- {
+ {
+ if (n >= 2)
+ {
+#if CONFIG_UNICODE_SAFETY
+ if ((s[1] ^ 0x80) < 0x40)
+#endif
+ {
+ *puc = ((unsigned int) (c & 0x1f) << 6)
+ | (unsigned int) (s[1] ^ 0x80);
+ return 2;
+ }
#if CONFIG_UNICODE_SAFETY
- if ((s[1] ^ 0x80) < 0x40)
+ /* invalid multibyte character */
#endif
- {
- *puc = ((unsigned int) (c & 0x1f) << 6)
- | (unsigned int) (s[1] ^ 0x80);
- return 2;
- }
- /* invalid multibyte character */
- }
- else
- {
- /* incomplete multibyte character */
- *puc = 0xfffd;
- return n;
- }
- }
+ }
+ else
+ {
+ /* incomplete multibyte character */
+ *puc = 0xfffd;
+ return 1;
+ }
+ }
else if (c < 0xf0)
- {
- if (n >= 3)
- {
+ {
+ if (n >= 3)
+ {
+#if CONFIG_UNICODE_SAFETY
+ if ((s[1] ^ 0x80) < 0x40)
+ {
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ if ((c >= 0xe1 || s[1] >= 0xa0)
+ && (c != 0xed || s[1] < 0xa0))
+#endif
+ {
+ *puc = ((unsigned int) (c & 0x0f) << 12)
+ | ((unsigned int) (s[1] ^ 0x80) << 6)
+ | (unsigned int) (s[2] ^ 0x80);
+ return 3;
+ }
#if CONFIG_UNICODE_SAFETY
- if ((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
- && (c >= 0xe1 || s[1] >= 0xa0)
- && (c != 0xed || s[1] < 0xa0))
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 3;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 2;
+ }
+ /* invalid multibyte character */
#endif
- {
- *puc = ((unsigned int) (c & 0x0f) << 12)
- | ((unsigned int) (s[1] ^ 0x80) << 6)
- | (unsigned int) (s[2] ^ 0x80);
- return 3;
- }
- /* invalid multibyte character */
- }
- else
- {
- /* incomplete multibyte character */
- *puc = 0xfffd;
- return n;
- }
- }
+ }
+ else
+ {
+ /* incomplete multibyte character */
+ *puc = 0xfffd;
+ if (n == 1 || (s[1] ^ 0x80) >= 0x40)
+ return 1;
+ else
+ return 2;
+ }
+ }
else if (c < 0xf8)
- {
- if (n >= 4)
- {
+ {
+ if (n >= 4)
+ {
#if CONFIG_UNICODE_SAFETY
- if ((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
- && (s[3] ^ 0x80) < 0x40
- && (c >= 0xf1 || s[1] >= 0x90)
+ if ((s[1] ^ 0x80) < 0x40)
+ {
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ if ((s[3] ^ 0x80) < 0x40)
+ {
+ if ((c >= 0xf1 || s[1] >= 0x90)
#if 1
- && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90))
+ && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90))
#endif
- )
+ )
#endif
- {
- *puc = ((unsigned int) (c & 0x07) << 18)
- | ((unsigned int) (s[1] ^ 0x80) << 12)
- | ((unsigned int) (s[2] ^ 0x80) << 6)
- | (unsigned int) (s[3] ^ 0x80);
- return 4;
- }
- /* invalid multibyte character */
- }
- else
- {
- /* incomplete multibyte character */
- *puc = 0xfffd;
- return n;
- }
- }
+ {
+ *puc = ((unsigned int) (c & 0x07) << 18)
+ | ((unsigned int) (s[1] ^ 0x80) << 12)
+ | ((unsigned int) (s[2] ^ 0x80) << 6)
+ | (unsigned int) (s[3] ^ 0x80);
+ return 4;
+ }
+#if CONFIG_UNICODE_SAFETY
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 4;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 3;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 2;
+ }
+ /* invalid multibyte character */
+#endif
+ }
+ else
+ {
+ /* incomplete multibyte character */
+ *puc = 0xfffd;
+ if (n == 1 || (s[1] ^ 0x80) >= 0x40)
+ return 1;
+ else if (n == 2 || (s[2] ^ 0x80) >= 0x40)
+ return 2;
+ else
+ return 3;
+ }
+ }
#if 0
else if (c < 0xfc)
- {
- if (n >= 5)
- {
+ {
+ if (n >= 5)
+ {
+#if CONFIG_UNICODE_SAFETY
+ if ((s[1] ^ 0x80) < 0x40)
+ {
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ if ((s[3] ^ 0x80) < 0x40)
+ {
+ if ((s[4] ^ 0x80) < 0x40)
+ {
+ if (c >= 0xf9 || s[1] >= 0x88)
+#endif
+ {
+ *puc = ((unsigned int) (c & 0x03) << 24)
+ | ((unsigned int) (s[1] ^ 0x80) << 18)
+ | ((unsigned int) (s[2] ^ 0x80) << 12)
+ | ((unsigned int) (s[3] ^ 0x80) << 6)
+ | (unsigned int) (s[4] ^ 0x80);
+ return 5;
+ }
#if CONFIG_UNICODE_SAFETY
- if ((s[1] ^ 0x80) < 0x40 && (s[2] ^ 0x80) < 0x40
- && (s[3] ^ 0x80) < 0x40 && (s[4] ^ 0x80) < 0x40
- && (c >= 0xf9 || s[1] >= 0x88))
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 5;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 4;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 3;
+ }
+ /* invalid multibyte character */
+ return 2;
+ }
+ /* invalid multibyte character */
#endif
- {
- *puc = ((unsigned int) (c & 0x03) << 24)
- | ((unsigned int) (s[1] ^ 0x80) << 18)
- | ((unsigned int) (s[2] ^ 0x80) << 12)
- | ((unsigned int) (s[3] ^ 0x80) << 6)
- | (unsigned int) (s[4] ^ 0x80);
- return 5;
- }
- /* invalid multibyte character */
- }
- else
- {
- /* incomplete multibyte character */
- *puc = 0xfffd;
- return n;
- }
- }
+ }
+ else
+ {
+ /* incomplete multibyte character */
+ *puc = 0xfffd;
+ return n;
+ }
+ }
else if (c < 0xfe)
- {
- if (n >= 6)
- {
+ {
+ if (n >= 6)
+ {
+#if CONFIG_UNICODE_SAFETY
+ if ((s[1] ^ 0x80) < 0x40)
+ {
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ if ((s[3] ^ 0x80) < 0x40)
+ {
+ if ((s[4] ^ 0x80) < 0x40)
+ {
+ if ((s[5] ^ 0x80) < 0x40)
+ {
+ if (c >= 0xfd || s[1] >= 0x84)
+#endif
+ {
+ *puc = ((unsigned int) (c & 0x01) << 30)
+ | ((unsigned int) (s[1] ^ 0x80) << 24)
+ | ((unsigned int) (s[2] ^ 0x80) << 18)
+ | ((unsigned int) (s[3] ^ 0x80) << 12)
+ | ((unsigned int) (s[4] ^ 0x80) << 6)
+ | (unsigned int) (s[5] ^ 0x80);
+ return 6;
+ }
#if CONFIG_UNICODE_SAFETY
- if ((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))
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 6;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 5;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 4;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 3;
+ }
+ /* invalid multibyte character */
+ return 2;
+ }
+ /* invalid multibyte character */
#endif
- {
- *puc = ((unsigned int) (c & 0x01) << 30)
- | ((unsigned int) (s[1] ^ 0x80) << 24)
- | ((unsigned int) (s[2] ^ 0x80) << 18)
- | ((unsigned int) (s[3] ^ 0x80) << 12)
- | ((unsigned int) (s[4] ^ 0x80) << 6)
- | (unsigned int) (s[5] ^ 0x80);
- return 6;
- }
- /* invalid multibyte character */
- }
- else
- {
- /* incomplete multibyte character */
- *puc = 0xfffd;
- return n;
- }
- }
+ }
+ else
+ {
+ /* incomplete multibyte character */
+ *puc = 0xfffd;
+ return n;
+ }
+ }
#endif
}
/* invalid multibyte character */
projects / gnulib.git / blobdiff