From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 3 May 2015 01:17:19 +0000 (-0400)
Subject: improve iswdigit macro to diagnose errors
X-Git-Tag: v1.1.9~4
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d0040e239e8d3048a7fb38f0bacaad4838fac605;p=oweals%2Fmusl.git

improve iswdigit macro to diagnose errors

this is analogous to commit 2ca55a93f2a11185d72dcb69006fd2c30b5c3144
for the macros in ctype.h.
---

diff --git a/include/wchar.h b/include/wchar.h
index ad727a86..0167dce6 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -175,7 +175,7 @@ wctype_t  wctype(const char *);
 
 #ifndef __cplusplus
 #undef iswdigit
-#define iswdigit(a) ((unsigned)(a)-'0' < 10)
+#define iswdigit(a) (0 ? iswdigit(a) : ((unsigned)(a)-'0') < 10)
 #endif
 #endif
 
diff --git a/include/wctype.h b/include/wctype.h
index 3da12195..bc2420d3 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -45,7 +45,7 @@ wctype_t  wctype(const char *);
 
 #ifndef __cplusplus
 #undef iswdigit
-#define iswdigit(a) (((unsigned)(a)-L'0') < 10)
+#define iswdigit(a) (0 ? iswdigit(a) : ((unsigned)(a)-'0') < 10)
 #endif
 
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \