Third try on correct fallback headers - re-add the checks to only include prototypes for functions which are known to be missing, and also add any compiler directives which may help in adding additional prototypes in the system headers (separate patch)

darcs-hash:20060325162103-ac50b-18f5074838a1c304c3d013378b7fa4e66b544cd9.gz

fallback.h

@@ -31,13 +31,7 @@ int tputs(const char *str, int affcnt, int (*putc)(tputs_arg_t));
 
 #endif
 
-/*
-  Here follows the prototypes for fallback implementations of various
-  standarcs libc functions relating to wide character support. Some of
-  these prototypes are always defined, since some libc versions
-  include the code, but you have to use special magical #defines for
-  the prototype to appear.
-*/
+#ifndef HAVE_FWPRINTF
 
 /**
    Print formated string. Some operating systems (Like NetBSD) do not
@@ -94,6 +88,9 @@ int vfwprintf( FILE *f, const wchar_t *filter, va_list va );
 */
 int vswprintf( wchar_t *out, size_t n, const wchar_t *filter, va_list va );
 
+#endif
+
+#ifndef HAVE_FGETWC
 /**
    Fallback implementation of fgetwc
 */
@@ -104,6 +101,10 @@ wint_t fgetwc(FILE *stream);
 */
 wint_t getwc(FILE *stream);
 
+#endif
+
+#ifndef HAVE_FPUTWC
+
 /**
    Fallback implementation of fputwc
 */
@@ -113,11 +114,18 @@ wint_t fputwc(wchar_t wc, FILE *stream);
 */
 wint_t putwc(wchar_t wc, FILE *stream);
 
+#endif
+
+#ifndef HAVE_WCSTOK
+
 /**
    Fallback implementation of wcstok. Uses code borrowed from glibc.
 */
 wchar_t *wcstok(wchar_t *wcs, const wchar_t *delim, wchar_t **ptr);
 
+#endif
+
+#ifndef HAVE_WCWIDTH
 
 /**
    Return the number of columns used by a character. This is a libc
@@ -132,14 +140,28 @@ wchar_t *wcstok(wchar_t *wcs, const wchar_t *delim, wchar_t **ptr);
 */
 int wcwidth( wchar_t c );
 
+#endif
+
+#ifndef HAVE_WCSDUP
+
 /**
    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
+
+/**
+   Fallback for wcsen. Returns the length of the specified string.
+*/
 size_t wcslen(const wchar_t *in);
 
+#endif
+
+#ifndef HAVE_WCSCASECMP
 /**
    Case insensitive string compare function. Wide string version of
    strcasecmp.
@@ -153,6 +175,10 @@ size_t wcslen(const wchar_t *in);
 */
 int wcscasecmp( const wchar_t *a, const wchar_t *b );
 
+#endif
+
+#ifndef HAVE_WCSNCASECMP
+
 /**
    Case insensitive string compare function. Wide string version of
    strncasecmp.
@@ -172,14 +198,27 @@ int wcsncasecmp( const wchar_t *a, const wchar_t *b, int count );
    always null terminated, and the null is not included in the string
    length.
 */
+
+#endif
+
+#ifndef HAVE_WCSNDUP
+
+/**
+   Fallback for wcsndup function. Returns a copy of \c in, truncated
+   to a maximum length of \c c.
+*/
 wchar_t *wcsndup( const wchar_t *in, int c );
 
+#endif
+
 /**
    Converts from wide char to digit in the specified base. If d is not
    a valid digit in the specified base, return -1.
 */
 long convert_digit( wchar_t d, int base );
 
+#ifndef HAVE_WCSTOL
+
 /**
    Fallback implementation. Convert a wide character string to a
    number in the specified base. This functions is the wide character
@@ -192,6 +231,6 @@ long wcstol(const wchar_t *nptr,
 			wchar_t **endptr,
 			int base);
 
-
+#endif
 
 #endif