New module 'unistr/u8-mbtoucr'.

diff --git a/lib/unistr/u8-mbtoucr.c b/lib/unistr/u8-mbtoucr.c
new file mode 100644 (file)
index 0000000..c1f45b1
--- /dev/null
+++ b/lib/unistr/u8-mbtoucr.c
@@ -0,0 +1,287 @@
+/* Look at first character in UTF-8 string, returning an error code.
+   Copyright (C) 1999-2002, 2006-2007 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 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_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n)
+{
+  uint8_t c = *s;
+
+  if (c < 0x80)
+    {
+      *puc = c;
+      return 1;
+    }
+  else if (c >= 0xc2)
+    {
+      if (c < 0xe0)
+       {
+         if (n >= 2)
+           {
+             if ((s[1] ^ 0x80) < 0x40)
+               {
+                 *puc = ((unsigned int) (c & 0x1f) << 6)
+                        | (unsigned int) (s[1] ^ 0x80);
+                 return 2;
+               }
+             /* invalid multibyte character */
+           }
+         else
+           {
+             /* incomplete multibyte character */
+             *puc = 0xfffd;
+             return -2;
+           }
+       }
+      else if (c < 0xf0)
+       {
+         if (n >= 2)
+           {
+             if ((s[1] ^ 0x80) < 0x40
+                 && (c >= 0xe1 || s[1] >= 0xa0)
+                 && (c != 0xed || s[1] < 0xa0))
+               {
+                 if (n >= 3)
+                   {
+                     if ((s[2] ^ 0x80) < 0x40)
+                       {
+                         *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 -2;
+                   }
+               }
+             /* invalid multibyte character */
+           }
+         else
+           {
+             /* incomplete multibyte character */
+             *puc = 0xfffd;
+             return -2;
+           }
+       }
+      else if (c < 0xf8)
+       {
+         if (n >= 2)
+           {
+             if ((s[1] ^ 0x80) < 0x40
+                 && (c >= 0xf1 || s[1] >= 0x90)
+#if 1
+                 && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90))
+#endif
+                )
+               {
+                 if (n >= 3)
+                   {
+                     if ((s[2] ^ 0x80) < 0x40)
+                       {
+                         if (n >= 4)
+                           {
+                             if ((s[3] ^ 0x80) < 0x40)
+                               {
+                                 *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 -2;
+                           }
+                       }
+                     /* invalid multibyte character */
+                   }
+                 else
+                   {
+                     /* incomplete multibyte character */
+                     *puc = 0xfffd;
+                     return -2;
+                   }
+               }
+             /* invalid multibyte character */
+           }
+         else
+           {
+             /* incomplete multibyte character */
+             *puc = 0xfffd;
+             return -2;
+           }
+       }
+#if 0
+      else if (c < 0xfc)
+       {
+         if (n >= 2)
+           {
+             if ((s[1] ^ 0x80) < 0x40
+                 && (c >= 0xf9 || s[1] >= 0x88))
+               {
+                 if (n >= 3)
+                   {
+                     if ((s[2] ^ 0x80) < 0x40)
+                       {
+                         if (n >= 4)
+                           {
+                             if ((s[3] ^ 0x80) < 0x40)
+                               {
+                                 if (n >= 5)
+                                   {
+                                     if ((s[4] ^ 0x80) < 0x40)
+                                       {
+                                         *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 -2;
+                                   }
+                               }
+                             /* invalid multibyte character */
+                           }
+                         else
+                           {
+                             /* incomplete multibyte character */
+                             *puc = 0xfffd;
+                             return -2;
+                           }
+                       }
+                     /* invalid multibyte character */
+                   }
+                 else
+                   {
+                     /* incomplete multibyte character */
+                     *puc = 0xfffd;
+                     return -2;
+                   }
+               }
+             /* invalid multibyte character */
+           }
+         else
+           {
+             /* incomplete multibyte character */
+             *puc = 0xfffd;
+             return -2;
+           }
+       }
+      else if (c < 0xfe)
+       {
+         if (n >= 2)
+           {
+             if ((s[1] ^ 0x80) < 0x40
+                 && (c >= 0xfd || s[1] >= 0x84))
+               {
+                 if (n >= 3)
+                   {
+                     if ((s[2] ^ 0x80) < 0x40)
+                       {
+                         if (n >= 4)
+                           {
+                             if ((s[3] ^ 0x80) < 0x40)
+                               {
+                                 if (n >= 5)
+                                   {
+                                     if ((s[4] ^ 0x80) < 0x40)
+                                       {
+                                         if (n >= 6)
+                                           {
+                                             if ((s[5] ^ 0x80) < 0x40)
+                                               {
+                                                 *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 -2;
+                                           }
+                                       }
+                                     /* invalid multibyte character */
+                                   }
+                                 else
+                                   {
+                                     /* incomplete multibyte character */
+                                     *puc = 0xfffd;
+                                     return -2;
+                                   }
+                               }
+                             /* invalid multibyte character */
+                           }
+                         else
+                           {
+                             /* incomplete multibyte character */
+                             *puc = 0xfffd;
+                             return -2;
+                           }
+                       }
+                     /* invalid multibyte character */
+                   }
+                 else
+                   {
+                     /* incomplete multibyte character */
+                     *puc = 0xfffd;
+                     return -2;
+                   }
+               }
+             /* invalid multibyte character */
+           }
+         else
+           {
+             /* incomplete multibyte character */
+             *puc = 0xfffd;
+             return -2;
+           }
+       }
+#endif
+    }
+  /* invalid multibyte character */
+  *puc = 0xfffd;
+  return -1;
+}

diff --git a/modules/unistr/u8-mbtoucr b/modules/unistr/u8-mbtoucr
new file mode 100644 (file)
index 0000000..f5eadc4
--- /dev/null
+++ b/modules/unistr/u8-mbtoucr
@@ -0,0 +1,24 @@
+Description:
+Look at first character in UTF-8 string, returning an error code upon failure.
+
+Files:
+lib/unistr/u8-mbtoucr.c
+
+Depends-on:
+unistr/base
+
+configure.ac:
+gl_MODULE_INDICATOR([unistr/u8-mbtoucr])
+
+Makefile.am:
+lib_SOURCES += unistr/u8-mbtoucr.c
+
+Include:
+"unistr.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+