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/*
* Copyright (c) 1983 Eric P. Allman
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* Neither the name of the University nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char Version[] = "@(#)util.c e07@nikhef.nl (Eric Wassenaar) 971113";
#endif
#include "vrfy.h"
/*
** FIXCRLF -- Fix trailing <CR><LF> combination in line
** ----------------------------------------------------
**
** Unconditionally strip a trailing <LF> from an input line,
** and optionally strip a preceding <CR>.
** Both characters must be removed during SMTP input, since
** they are part of the protocol.
** But when reading local input, we must just remove the
** trailing <LF>, being the UNIX canonical <NL> character,
** and preserve a possible <CR>. This guarantees transparent
** transmission of files ending in <CR><LF>.
**
** Returns:
** None.
**
** Side effects:
** The line is changed in place.
*/
void
fixcrlf(line, stripcr)
char *line; /* the input line to fix */
bool stripcr; /* also strip CR, if set */
{
register char *p;
p = index(line, '\n');
if (p != NULL)
{
/* move back to preceding CR if necessary */
if (stripcr && ((p > line) && (p[-1] == '\r')))
p--;
/* properly terminate the line */
*p = '\0';
}
}
/*
** MAXSTR -- Ensure string does not exceed maximum size
** ----------------------------------------------------
**
** Returns:
** Pointer to the (possibly truncated) string.
**
** If necessary, a new string is allocated, and is then
** truncated, and the original string is left intact.
** Otherwise the original string is truncated in place.
**
*/
char *
maxstr(string, n, save)
char *string; /* the string to check */
int n; /* the maximum allowed size */
bool save; /* allocate new string, if set */
{
if (strlength(string) > n)
{
if (save)
string = newstr(string);
string[n] = '\0';
}
return(string);
}
/*
** PRINTABLE -- Expand quote bits/control chars in a string
** --------------------------------------------------------
**
** Returns:
** Pointer to static buffer containing the expansion.
**
** The expanded string is silently truncated if it gets too long.
*/
char *
printable(string)
char *string; /* the string to expand */
{
static char buf[BUFSIZ]; /* expanded string buffer */
register char *p = buf;
register char *s = string;
register char c;
while ((c = *s++) != '\0')
{
if (p >= buf + sizeof(buf) - 4)
break;
if (!isascii(c))
{
*p++ = '\\';
c &= 0177;
}
if (iscntrl(c) && !isspace(c))
{
*p++ = '^';
c ^= 0100;
}
*p++ = c;
}
*p = '\0';
return(buf);
}
/*
** XALLOC -- Allocate or reallocate additional memory
** --------------------------------------------------
**
** Returns:
** Pointer to (re)allocated buffer space.
** Aborts if the requested memory could not be obtained.
*/
ptr_t *
xalloc(buf, size)
register ptr_t *buf; /* current start of buffer space */
siz_t size; /* number of bytes to allocate */
{
if (buf == NULL)
buf = malloc(size);
else
buf = realloc(buf, size);
if (buf == NULL)
{
error("Out of memory");
exit(EX_OSERR);
}
return(buf);
}
/*
** ITOA -- Convert integer value to ascii string
** ---------------------------------------------
**
** Returns:
** Pointer to static storage containing string.
*/
char *
itoa(n)
int n; /* value to convert */
{
static char buf[30]; /* sufficient for 64-bit values */
(void) sprintf(buf, "%d", n);
return(buf);
}
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