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From: Marcelo Araujo <araujo@FreeBSD.org>
Date: Fri, 26 May 2017 03:27:06 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r318915 - head/usr.sbin/ypldap
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Author: araujo
Date: Fri May 26 03:27:06 2017
New Revision: 318915
URL: https://svnweb.freebsd.org/changeset/base/318915

Log:
  Simplify parseval() by allocating a buffer the size of the input string,
  which will always be big enough to hold the output string.
  
  Obtained from:	OpenBSD (revision 1.36)

Modified:
  head/usr.sbin/ypldap/aldap.c

Modified: head/usr.sbin/ypldap/aldap.c
==============================================================================
--- head/usr.sbin/ypldap/aldap.c	Fri May 26 02:30:26 2017	(r318914)
+++ head/usr.sbin/ypldap/aldap.c	Fri May 26 03:27:06 2017	(r318915)
@@ -1212,30 +1212,19 @@ char *
 parseval(char *p, size_t len)
 {
 	char	 hex[3];
-	char	*cp = p, *buffer, *newbuffer;
-	size_t	 size, newsize, i, j;
+	char	*buffer;
+	size_t	 i, j;
 
-	size = 50;
-	if ((buffer = calloc(1, size)) == NULL)
+	if ((buffer = calloc(1, len + 1)) == NULL)
 		return NULL;
 
 	for (i = j = 0; j < len; i++) {
-		if (i >= size) {
-			newsize = size + 1024;
-			if ((newbuffer = realloc(buffer, newsize)) == NULL) {
-				free(buffer);
-				return (NULL);
-			}
-			buffer = newbuffer;
-			size = newsize;
-		}
-
-		if (cp[j] == '\\') {
-			strlcpy(hex, cp + j + 1, sizeof(hex));
+		if (p[j] == '\\') {
+			strlcpy(hex, p + j + 1, sizeof(hex));
 			buffer[i] = (char)strtoumax(hex, NULL, 16);
 			j += 3;
 		} else {
-			buffer[i] = cp[j];
+			buffer[i] = p[j];
 			j++;
 		}
 	}