From: robertl <robertl@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Date: Tue, 9 Nov 2004 16:54:53 +0000 (+0000)
Subject: Fix case when source string consists of nothing but spaces.  (Thanx, holux...)
X-Git-Tag: archive/raspbian/1.10.0+ds-2+rpi1~1^2~12^2~11^2~3869
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ba95c3c2feb45fdda0c33737038bf264ced7e280;p=gpsbabel.git

Fix case when source string consists of nothing but spaces.  (Thanx, holux...)
---

diff --git a/gpsbabel/mkshort.c b/gpsbabel/mkshort.c
index 1c447244d..19ec3a51e 100644
--- a/gpsbabel/mkshort.c
+++ b/gpsbabel/mkshort.c
@@ -290,8 +290,12 @@ mkshort(void *h, const char *istring)
 	ostring = nstring;
 
 	/* Eliminate leading whitespace in all cases */
-	while (isspace(ostring[0])) {
-		memmove(&ostring[0], &ostring[1], strlen(ostring)-1);
+	while (ostring[0] && isspace(ostring[0])) {
+		/* If orig string has N bytes, we want to copy N-1 bytes
+		 * of the string itself plus the string terminator (which 
+		 * matters if the string consists of nothing but spaces) 
+		 */
+		memmove(&ostring[0], &ostring[1], strlen(ostring));
 	}
 
 	if (!hdl->whitespaceok) {