X-Git-Url: https://git.deb.at/w?a=blobdiff_plain;f=misc.c;h=f72475da74287ffee67c43666fc49e6a91dc7283;hb=3370ba68ac9cbbd583da6997c039b29b0fc43b7a;hp=01bdd545095073254211065d076f4930a9b11b3f;hpb=6f27db4afffc464b91c1ef23b0b5d85322e8d9b8;p=pkg%2Fabook.git

diff --git a/misc.c b/misc.c
index 01bdd54..f72475d 100644
--- a/misc.c
+++ b/misc.c
@@ -64,6 +64,19 @@ strtrim(char *s)
 	return s;
 }
 
+int
+is_number(char *p)
+{
+	if(!p || !*p || (*p == '-' && !*++p))
+		return 0;
+
+	for(; *p; p++)
+		if(!isdigit(*p))
+			return 0;
+
+	return 1;
+}
+
 
 #ifdef HAVE_CONFIG_H
 #	include "config.h"