[src/trunk]: src/lib/libc/locale add a function to handle alias names.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5be3c4d4f7ee
branches:  trunk
changeset: 522227:5be3c4d4f7ee
user:      yamt <yamt%NetBSD.org@localhost>
date:      Wed Feb 13 07:45:52 2002 +0000

description:
add a function to handle alias names.
(primarily for nls, encoding and locale names)

diffstat:

 lib/libc/locale/Makefile.inc      |    4 +-
 lib/libc/locale/aliasname.c       |  128 ++++++++++++++++++++++++++++++++++++++
 lib/libc/locale/aliasname_local.h |   29 ++++++++
 3 files changed, 159 insertions(+), 2 deletions(-)

diffs (184 lines):

diff -r 93ee9f1a4bd5 -r 5be3c4d4f7ee lib/libc/locale/Makefile.inc
--- a/lib/libc/locale/Makefile.inc      Wed Feb 13 06:30:46 2002 +0000
+++ b/lib/libc/locale/Makefile.inc      Wed Feb 13 07:45:52 2002 +0000
@@ -1,5 +1,5 @@
 #      from: @(#)Makefile.inc  5.1 (Berkeley) 2/18/91
-#      $NetBSD: Makefile.inc,v 1.36 2001/09/27 16:30:36 yamt Exp $
+#      $NetBSD: Makefile.inc,v 1.37 2002/02/13 07:45:52 yamt Exp $
 
 # locale sources
 .PATH: ${ARCHDIR}/locale ${.CURDIR}/locale
@@ -7,7 +7,7 @@
 SRCS+= _def_messages.c _def_monetary.c _def_numeric.c _def_time.c \
        ctypeio.c localeconv.c nl_langinfo.c \
        setlocale.c setlocale1.c setlocale32.c __mb_cur_max.c \
-       wcstol.c wcstoul.c wcstod.c
+       wcstol.c wcstoul.c wcstod.c aliasname.c
 MAN+=  nl_langinfo.3 setlocale.3
 
 MLINKS+=setlocale.3 localeconv.3
diff -r 93ee9f1a4bd5 -r 5be3c4d4f7ee lib/libc/locale/aliasname.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/locale/aliasname.c       Wed Feb 13 07:45:52 2002 +0000
@@ -0,0 +1,128 @@
+/* $NetBSD: aliasname.c,v 1.1 2002/02/13 07:45:52 yamt Exp $ */
+
+/*-
+ * Copyright (c)2002 YAMAMOTO Takashi,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: aliasname.c,v 1.1 2002/02/13 07:45:52 yamt Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "aliasname_local.h"
+
+__inline int __is_ws(char);
+
+__inline int __is_ws(char ch)
+{
+
+       return (ch == ' ' || ch == '\t');
+}
+
+const char *
+__unaliasname(const char *dbname, const char *alias, void *buf, size_t bufsize)
+{
+       FILE *fp = NULL;
+       const char *result = alias;
+       size_t resultlen;
+       size_t aliaslen;
+       const char *p;
+       size_t len;
+
+       _DIAGASSERT(dbname != NULL);
+       _DIAGASSERT(alias != NULL);
+       _DIAGASSERT(buf != NULL);
+
+       fp = fopen(dbname, "r");
+       if (fp == NULL)
+               goto quit;
+
+       aliaslen = strlen(alias);
+
+       while (/*CONSTCOND*/ 1) {
+               p = fgetln(fp, &len);
+               if (p == NULL)
+                       goto quit; /* eof or error */
+
+               _DIAGASSERT(len != 0);
+
+               /* ignore terminating NL */
+               if (p[len - 1] == '\n')
+                       len--;
+
+               /* ignore null line and comment */
+               if (len == 0 || p[0] == '#')
+                       continue;
+
+               if (aliaslen > len)
+                       continue;
+
+               if (memcmp(alias, p, aliaslen))
+                       continue;
+
+               p += aliaslen;
+               len -= aliaslen;
+
+               if (len == 0 || !__is_ws(*p))
+                       continue;
+
+               /* entry was found here */
+               break;
+
+               /* NOTREACHED */
+       }
+
+       /* skip white spaces */
+       do {
+               p++;
+               len--;
+       } while (len != 0 && __is_ws(*p));
+
+       if (len == 0)
+               goto quit;
+
+       /* count length of result */
+       resultlen = 0;
+       while (resultlen < len && !__is_ws(*p))
+               resultlen++;
+
+       /* check if space is enough */
+       if (bufsize < resultlen + 1)
+               goto quit;
+
+       memcpy(buf, p, resultlen);
+       ((char *)buf)[resultlen] = 0;
+       result = buf;
+
+quit:
+       if (fp)
+               fclose(fp);
+
+       return result;
+}
diff -r 93ee9f1a4bd5 -r 5be3c4d4f7ee lib/libc/locale/aliasname_local.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/locale/aliasname_local.h Wed Feb 13 07:45:52 2002 +0000
@@ -0,0 +1,29 @@
+/* $NetBSD: aliasname_local.h,v 1.1 2002/02/13 07:45:52 yamt Exp $ */
+
+/*-
+ * Copyright (c)2002 YAMAMOTO Takashi,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+const char *__unaliasname(const char *, const char *, void *, size_t);