CREDITS update.

[paraslash.git] / para.h

diff --git a/para.h b/para.h
index 9ee318e54e4cb1dae4798f41d60c9187dde517b2..0cb1538d2725fd79c7de01871bcb617bcd73c706 100644 (file)
--- a/para.h
+++ b/para.h
@@ -217,3 +217,18 @@ static inline long int para_random(unsigned max)
 
 /** Get the size of an array */
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/**
+ * Wrapper for isspace.
+ * NetBSD needs this.
+ */
+/*
+ * The values should be cast to an unsigned char first, then to int.
+ * Why? Because the isdigit (as do all other is/to functions/macros)
+ * expect a number from 0 upto and including 255 as their (int) argument.
+ * Because char is signed on most systems, casting it to int immediately
+ * gives the functions an argument between -128 and 127 (inclusive),
+ * which they will use as an array index, and which will thus fail
+ * horribly for characters which have their most significant bit set.
+ */
+#define para_isspace(c) isspace((int)(unsigned char)(c))