1 /* 2 * Copyright (c) 1998-2001 Proofpoint, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1997 Eric P. Allman. All rights reserved. 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * By using this file, you agree to the terms and conditions set 9 * forth in the LICENSE file which can be found at the top level of 10 * the sendmail distribution. 11 * 12 */ 13 14 #include <sendmail.h> 15 16 SM_RCSID("@(#)$Id: snprintf.c,v 8.45 2013/11/22 20:51:50 ca Exp $") 17 18 /* 19 ** SHORTENSTRING -- return short version of a string 20 ** 21 ** If the string is already short, just return it. If it is too 22 ** long, return the head and tail of the string. 23 ** 24 ** Parameters: 25 ** s -- the string to shorten. 26 ** m -- the max length of the string (strlen()). 27 ** 28 ** Returns: 29 ** Either s or a short version of s. 30 */ 31 32 char * 33 shortenstring(s, m) 34 register const char *s; 35 size_t m; 36 { 37 size_t l; 38 static char buf[MAXSHORTSTR + 1]; 39 40 l = strlen(s); 41 if (l < m) 42 return (char *) s; 43 if (m > MAXSHORTSTR) 44 m = MAXSHORTSTR; 45 else if (m < 10) 46 { 47 if (m < 5) 48 { 49 (void) sm_strlcpy(buf, s, m + 1); 50 return buf; 51 } 52 (void) sm_strlcpy(buf, s, m - 2); 53 (void) sm_strlcat(buf, "...", sizeof buf); 54 return buf; 55 } 56 m = (m - 3) / 2; 57 (void) sm_strlcpy(buf, s, m + 1); 58 (void) sm_strlcat2(buf, "...", s + l - m, sizeof buf); 59 return buf; 60 } 61