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authorRich Felker <dalias@aerifal.cx>2011-09-26 18:56:56 -0400
committerRich Felker <dalias@aerifal.cx>2011-09-26 18:56:56 -0400
commit7e14ed1360c65b78c3ad1fc4fafea13e30067478 (patch)
treea8fc0c6d5245613962765857df15aa75acbafc64 /include/ctype.h
parent3bec53e0d3bb5e74d2e2dca34f50aadfaf832607 (diff)
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fix ctype macros to cast argument to (unsigned) first
issue reported by nsz, but it's actually not just pedantic. the functions can take input of any arithmetic type, including floating point, and the behavior needs to be as if the conversion implicit in the function call took place.
Diffstat (limited to 'include/ctype.h')
-rw-r--r--include/ctype.h12
1 files changed, 6 insertions, 6 deletions
diff --git a/include/ctype.h b/include/ctype.h
index 97b9737c..a605d089 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -16,12 +16,12 @@ int isxdigit(int);
int tolower(int);
int toupper(int);
-#define isalpha(a) ((unsigned)(((a)|32)-'a') < 26)
-#define isdigit(a) ((unsigned)((a)-'0') < 10)
-#define islower(a) ((unsigned)((a)-'a') < 26)
-#define isupper(a) ((unsigned)((a)-'A') < 26)
-#define isprint(a) ((unsigned)((a)-0x20) < 0x5f)
-#define isgraph(a) ((unsigned)((a)-0x21) < 0x5e)
+#define isalpha(a) ((((unsigned)(a)|32)-'a') < 26)
+#define isdigit(a) (((unsigned)(a)-'0') < 10)
+#define islower(a) (((unsigned)(a)-'a') < 26)
+#define isupper(a) (((unsigned)(a)-'A') < 26)
+#define isprint(a) (((unsigned)(a)-0x20) < 0x5f)
+#define isgraph(a) (((unsigned)(a)-0x21) < 0x5e)