From 70ac2eb0bf1c5a24b981f4494eceda431a18a660 Mon Sep 17 00:00:00 2001
From: matze <matze@af93e077-1a23-4f1e-9cbe-9382a9d578f5>
Date: Sun, 29 Jul 2007 01:12:19 +0000
Subject: [PATCH] length check

git-svn-id: https://shell.noname-ev.de/svn/kasse/c128@36 af93e077-1a23-4f1e-9cbe-9382a9d578f5
---
 general.c | 8 +++++++-
 general.h | 2 +-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/general.c b/general.c
index 9f0c6c6..03bc576 100644
--- a/general.c
+++ b/general.c
@@ -29,7 +29,13 @@ char *get_input() {
 	return output;
 }
 
-char * format_euro(char * s, int cent){
+char * format_euro(char * s, int maxlen, int cent){
+	int tmp = cent;
+	int len = 5; // 1 char at least + 4 (== strlen(",EUR"))
+	while ((tmp/=10) > 0)
+		len++;
+	if (len>maxlen)
+		return NULL;
 	sprintf(s, "%d,%dEUR", cent/100, cent%100);
 	return s;
 }
diff --git a/general.h b/general.h
index 1a607f1..6d55870 100644
--- a/general.h
+++ b/general.h
@@ -2,7 +2,7 @@
 #define GENERAL_H_
 typedef unsigned char BYTE;
 char *get_input();
-char * format_euro(char * s, int cent);
+char * format_euro(char * s, int maxlen, int cent);
 void c128_perror(BYTE, char*);
 extern BYTE _oserror;
 #endif /*GENERAL_H_*/
-- 
2.39.5