added issafe() define for "safe" characters

diff --git a/source/include/charset.h b/source/include/charset.h
index 7091732223a4587333949e4534939f5fa39012ff..14b6ec2020f66604505b0b06fdce3c495963e78d 100644 (file)
--- a/source/include/charset.h
+++ b/source/include/charset.h
@@ -57,5 +57,9 @@ extern void charset_initialise(void);
 #define islower(c) (((char)(c)) != toupper(c))
 #define isdoschar(c) (dos_char_map[(char)(c)] != 0)
 #define isspace(c) ((c)==' ' || (c) == '\t')
 #define islower(c) (((char)(c)) != toupper(c))
 #define isdoschar(c) (dos_char_map[(char)(c)] != 0)
 #define isspace(c) ((c)==' ' || (c) == '\t')

+
+/* this is used to determine if a character is safe to use in
+   something that may be put on a command line */
+#define issafe(c) (isalnum(c) || strchr("-._",c))

 #endif
 
 #endif