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authorSergey Poznyakoff <gray@gnu.org.ua>2005-02-27 20:14:53 (GMT)
committer Sergey Poznyakoff <gray@gnu.org.ua>2005-02-27 20:14:53 (GMT)
commit396fcb009c755205fea0772dbc2ddeed84bc73a1 (patch) (side-by-side diff)
tree512f9443b3785223e7c4b917cf0e1fb72613cc1c /lib
parentb3c14bfb283c5fe105fb23dbab11b09b07c2e613 (diff)
downloadmailutils-396fcb009c755205fea0772dbc2ddeed84bc73a1.tar.gz
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Added to the repository
Diffstat (limited to 'lib') (more/less context) (ignore whitespace changes)
-rw-r--r--lib/mbswidth.c219
-rw-r--r--lib/mbswidth.h61
2 files changed, 280 insertions, 0 deletions
diff --git a/lib/mbswidth.c b/lib/mbswidth.c
new file mode 100644
index 0000000..a511760
--- a/dev/null
+++ b/lib/mbswidth.c
@@ -0,0 +1,219 @@
+/* Determine the number of screen columns needed for a string.
+ Copyright (C) 2000-2004 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* Written by Bruno Haible <haible@clisp.cons.org>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification. */
+#include "mbswidth.h"
+
+/* Get MB_CUR_MAX. */
+#include <stdlib.h>
+
+#include <string.h>
+
+/* Get isprint(). */
+#include <ctype.h>
+
+/* Get mbstate_t, mbrtowc(), mbsinit(), wcwidth(). */
+#if HAVE_WCHAR_H
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
+ <wchar.h>. */
+# include <stdio.h>
+# include <time.h>
+# include <wchar.h>
+#endif
+
+/* Get iswprint(), iswcntrl(). */
+#if HAVE_WCTYPE_H
+# include <wctype.h>
+#endif
+#if !defined iswprint && !HAVE_ISWPRINT
+# define iswprint(wc) 1
+#endif
+#if !defined iswcntrl && !HAVE_ISWCNTRL
+# define iswcntrl(wc) 0
+#endif
+
+#ifndef mbsinit
+# if !HAVE_MBSINIT
+# define mbsinit(ps) 1
+# endif
+#endif
+
+#ifndef HAVE_DECL_WCWIDTH
+"this configure-time declaration test was not run"
+#endif
+#if !HAVE_DECL_WCWIDTH
+int wcwidth ();
+#endif
+
+#ifndef wcwidth
+# if !HAVE_WCWIDTH
+/* wcwidth doesn't exist, so assume all printable characters have
+ width 1. */
+# define wcwidth(wc) ((wc) == 0 ? 0 : iswprint (wc) ? 1 : -1)
+# endif
+#endif
+
+/* Get ISPRINT. */
+#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
+# define IN_CTYPE_DOMAIN(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) isascii(c)
+#endif
+/* Undefine to protect against the definition in wctype.h of Solaris 2.6. */
+#undef ISPRINT
+#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
+#undef ISCNTRL
+#define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
+
+/* Returns the number of columns needed to represent the multibyte
+ character string pointed to by STRING. If a non-printable character
+ occurs, and MBSW_REJECT_UNPRINTABLE is specified, -1 is returned.
+ With flags = MBSW_REJECT_INVALID | MBSW_REJECT_UNPRINTABLE, this is
+ the multibyte analogue of the wcswidth function. */
+int
+mbswidth (const char *string, int flags)
+{
+ return mbsnwidth (string, strlen (string), flags);
+}
+
+/* Returns the number of columns needed to represent the multibyte
+ character string pointed to by STRING of length NBYTES. If a
+ non-printable character occurs, and MBSW_REJECT_UNPRINTABLE is
+ specified, -1 is returned. */
+int
+mbsnwidth (const char *string, size_t nbytes, int flags)
+{
+ const char *p = string;
+ const char *plimit = p + nbytes;
+ int width;
+
+ width = 0;
+#if HAVE_MBRTOWC
+ if (MB_CUR_MAX > 1)
+ {
+ while (p < plimit)
+ switch (*p)
+ {
+ case ' ': case '!': case '"': case '#': case '%':
+ case '&': case '\'': case '(': case ')': case '*':
+ case '+': case ',': case '-': case '.': case '/':
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ case ':': case ';': case '<': case '=': case '>':
+ case '?':
+ case 'A': case 'B': case 'C': case 'D': case 'E':
+ case 'F': case 'G': case 'H': case 'I': case 'J':
+ case 'K': case 'L': case 'M': case 'N': case 'O':
+ case 'P': case 'Q': case 'R': case 'S': case 'T':
+ case 'U': case 'V': case 'W': case 'X': case 'Y':
+ case 'Z':
+ case '[': case '\\': case ']': case '^': case '_':
+ case 'a': case 'b': case 'c': case 'd': case 'e':
+ case 'f': case 'g': case 'h': case 'i': case 'j':
+ case 'k': case 'l': case 'm': case 'n': case 'o':
+ case 'p': case 'q': case 'r': case 's': case 't':
+ case 'u': case 'v': case 'w': case 'x': case 'y':
+ case 'z': case '{': case '|': case '}': case '~':
+ /* These characters are printable ASCII characters. */
+ p++;
+ width++;
+ break;
+ default:
+ /* If we have a multibyte sequence, scan it up to its end. */
+ {
+ mbstate_t mbstate;
+ memset (&mbstate, 0, sizeof mbstate);
+ do
+ {
+ wchar_t wc;
+ size_t bytes;
+ int w;
+
+ bytes = mbrtowc (&wc, p, plimit - p, &mbstate);
+
+ if (bytes == (size_t) -1)
+ /* An invalid multibyte sequence was encountered. */
+ {
+ if (!(flags & MBSW_REJECT_INVALID))
+ {
+ p++;
+ width++;
+ break;
+ }
+ else
+ return -1;
+ }
+
+ if (bytes == (size_t) -2)
+ /* An incomplete multibyte character at the end. */
+ {
+ if (!(flags & MBSW_REJECT_INVALID))
+ {
+ p = plimit;
+ width++;
+ break;
+ }
+ else
+ return -1;
+ }
+
+ if (bytes == 0)
+ /* A null wide character was encountered. */
+ bytes = 1;
+
+ w = wcwidth (wc);
+ if (w >= 0)
+ /* A printable multibyte character. */
+ width += w;
+ else
+ /* An unprintable multibyte character. */
+ if (!(flags & MBSW_REJECT_UNPRINTABLE))
+ width += (iswcntrl (wc) ? 0 : 1);
+ else
+ return -1;
+
+ p += bytes;
+ }
+ while (! mbsinit (&mbstate));
+ }
+ break;
+ }
+ return width;
+ }
+#endif
+
+ while (p < plimit)
+ {
+ unsigned char c = (unsigned char) *p++;
+
+ if (ISPRINT (c))
+ width++;
+ else if (!(flags & MBSW_REJECT_UNPRINTABLE))
+ width += (ISCNTRL (c) ? 0 : 1);
+ else
+ return -1;
+ }
+ return width;
+}
diff --git a/lib/mbswidth.h b/lib/mbswidth.h
new file mode 100644
index 0000000..4fcdb20
--- a/dev/null
+++ b/lib/mbswidth.h
@@ -0,0 +1,61 @@
+/* Determine the number of screen columns needed for a string.
+ Copyright (C) 2000-2004 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include <stddef.h>
+
+/* Avoid a clash of our mbswidth() with a function of the same name defined
+ in UnixWare 7.1.1 <wchar.h>. We need this #include before the #define
+ below.
+ However, we don't want to #include <wchar.h> on all platforms because
+ - Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ - BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
+ <wchar.h>. */
+#if HAVE_DECL_MBSWIDTH_IN_WCHAR_H
+# include <wchar.h>
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Optional flags to influence mbswidth/mbsnwidth behavior. */
+
+/* If this bit is set, return -1 upon finding an invalid or incomplete
+ character. Otherwise, assume invalid characters have width 1. */
+#define MBSW_REJECT_INVALID 1
+
+/* If this bit is set, return -1 upon finding a non-printable character.
+ Otherwise, assume unprintable characters have width 0 if they are
+ control characters and 1 otherwise. */
+#define MBSW_REJECT_UNPRINTABLE 2
+
+
+/* Returns the number of screen columns needed for STRING. */
+#define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */
+extern int mbswidth (const char *string, int flags);
+
+/* Returns the number of screen columns needed for the NBYTES bytes
+ starting at BUF. */
+extern int mbsnwidth (const char *buf, size_t nbytes, int flags);
+
+
+#ifdef __cplusplus
+}
+#endif

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