From b8ea709c1e8f0ad031bae9d5f7b340bd642a8620 Mon Sep 17 00:00:00 2001
From: axel <axel@liljencrantz.se>
Date: Sun, 18 Dec 2005 07:32:05 +1000
Subject: [PATCH] Add autoconf checks for wide character string functions

darcs-hash:20051217213205-ac50b-df9ea4cbc1a7e4235578bd4fc542ddb7788d41cc.gz
---
 common.c          | 24 ++++++++++++++++++------
 common.h          | 14 +++++++++++++-
 configure.ac      |  2 ++
 doc_src/block.txt |  2 +-
 4 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/common.c b/common.c
index 7819a31bd..7fc868a0f 100644
--- a/common.c
+++ b/common.c
@@ -574,6 +574,7 @@ wcslcpy(wchar_t *dst, const wchar_t *src, size_t siz)
 	/* count does not include NUL */
 }
 
+#ifndef HAVE_WCSDUP
 wchar_t *wcsdup( const wchar_t *in )
 {
 	size_t len=wcslen(in);
@@ -587,10 +588,20 @@ wchar_t *wcsdup( const wchar_t *in )
 	return out;
 	
 }
+#endif
 
-/**
-   Fallback implementation if missing from libc
-*/
+#ifndef HAVE_WCSLEN
+size_t wcslen(const wchar_t *in)
+{
+	const wchar_t *end=in;
+	while( *end )
+		end++;
+	return end-in;
+}
+#endif
+
+
+#ifndef HAVE_WCSCASECMP
 int wcscasecmp( const wchar_t *a, const wchar_t *b )
 {
 	if( *a == 0 )
@@ -607,10 +618,10 @@ int wcscasecmp( const wchar_t *a, const wchar_t *b )
 	else
 		return wcscasecmp( a+1,b+1);
 }
+#endif
 
-/**
-   Fallback implementation if missing from libc
-*/
+
+#ifndef HAVE_WCSNCASECMP
 int wcsncasecmp( const wchar_t *a, const wchar_t *b, int count )
 {
 	if( count == 0 )
@@ -630,6 +641,7 @@ int wcsncasecmp( const wchar_t *a, const wchar_t *b, int count )
 	else
 		return wcsncasecmp( a+1,b+1, count-1);
 }
+#endif
 
 int wcsvarname( wchar_t *str )
 {
diff --git a/common.h b/common.h
index 60b74c538..5176b4e40 100644
--- a/common.h
+++ b/common.h
@@ -134,6 +134,7 @@ wchar_t *wcsdupcat( const wchar_t *a, const wchar_t *b );
 */
 wchar_t *wcsdupcat2( const wchar_t *a, ... );
 
+#ifndef HAVE_WCSNDUP
 /**
    Returns a newly allocated wide character string wich is a copy of
    the string in, but of length c or shorter. The returned string is
@@ -141,6 +142,7 @@ wchar_t *wcsdupcat2( const wchar_t *a, ... );
    length.
 */
 wchar_t *wcsndup( const wchar_t *in, int c );
+#endif
 
 /**
    Converts from wide char to digit in the specified base. If d is not
@@ -183,12 +185,19 @@ size_t wcslcat( wchar_t *dst, const wchar_t *src, size_t siz );
 */
 size_t wcslcpy( wchar_t *dst, const wchar_t *src, size_t siz );
 
+#ifndef HAVE_WCSDUP
 /**
-   Create a dublicate string. Wide string version of strdup. Will
+   Create a duplicate string. Wide string version of strdup. Will
    automatically exit if out of memory.
 */
 wchar_t *wcsdup(const wchar_t *in);
+#endif
 
+#ifndef HAVE_WCSLEN
+size_t wcslen(const wchar_t *in);
+#endif
+
+#ifndef HAVE_WCSCASECMP
 /**
    Case insensitive string compare function. Wide string version of
    strcasecmp.
@@ -201,7 +210,9 @@ wchar_t *wcsdup(const wchar_t *in);
    a user-supplied string should be considered a bug.
 */
 int wcscasecmp( const wchar_t *a, const wchar_t *b );
+#endif
 
+#ifndef HAVE_WCSNCASECMP
 /**
    Case insensitive string compare function. Wide string version of
    strncasecmp.
@@ -214,6 +225,7 @@ int wcscasecmp( const wchar_t *a, const wchar_t *b );
    a user-supplied string should be considered a bug.
 */
 int wcsncasecmp( const wchar_t *a, const wchar_t *b, int count );
+#endif
 
 /**
    Test if the given string is a valid variable name
diff --git a/configure.ac b/configure.ac
index b98c61741..68ac8a1ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -120,6 +120,8 @@ fi
 AC_CHECK_LIB(socket, connect)
 AC_CHECK_LIB(rt, nanosleep)
 
+AC_CHECK_FUNCS(wcsdup wcsndup wcslen wcscasecmp wcsncasecmp)
+
 # Check if we have ncurses, and use it rather than curses if possible.
 AC_CHECK_HEADERS([ncurses.h],[AC_SUBST(CURSESLIB,[ncurses]) AC_DEFINE(HAVE_NCURSES_H)],[AC_SUBST(CURSESLIB,[curses])])
 
diff --git a/doc_src/block.txt b/doc_src/block.txt
index e5fe2ed24..8e38c04b9 100644
--- a/doc_src/block.txt
+++ b/doc_src/block.txt
@@ -13,7 +13,7 @@
 \subsection block-example Example
 
 <pre>block -g
-#Do something that should not be interrupted
+\#Do something that should not be interrupted
 block -e
 </pre>