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/*
* "$Id: string.c 4683 2005-09-21 22:17:44Z mike $"
*
* String functions for the Common UNIX Printing System (CUPS).
*
* Copyright 1997-2005 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
* property of Easy Software Products and are protected by Federal
* copyright law. Distribution and use rights are outlined in the file
* "LICENSE.txt" which should have been included with this file. If this
* file is missing or damaged please contact Easy Software Products
* at:
*
* Attn: CUPS Licensing Information
* Easy Software Products
* 44141 Airport View Drive, Suite 204
* Hollywood, Maryland 20636 USA
*
* Voice: (301) 373-9600
* EMail: cups-info@cups.org
* WWW: http://www.cups.org
*
* This file is subject to the Apple OS-Developed Software exception.
*
* Contents:
*
* _cups_strcpy() - Copy a string allowing for overlapping strings.
* _cups_strdup() - Duplicate a string.
* _cups_strcasecmp() - Do a case-insensitive comparison.
* _cups_strncasecmp() - Do a case-insensitive comparison on up to N chars.
* _cups_strlcat() - Safely concatenate two strings.
* _cups_strlcpy() - Safely copy two strings.
*/
/*
* Include necessary headers...
*/
#include "string.h"
/*
* '_cups_strcpy()' - Copy a string allowing for overlapping strings.
*/
void
_cups_strcpy(char *dst, /* I - Destination string */
const char *src) /* I - Source string */
{
while (*src)
*dst++ = *src++;
*dst = '\0';
}
/*
* '_cups_strdup()' - Duplicate a string.
*/
#ifndef HAVE_STRDUP
char * /* O - New string pointer */
_cups_strdup(const char *s) /* I - String to duplicate */
{
char *t; /* New string pointer */
if (s == NULL)
return (NULL);
if ((t = malloc(strlen(s) + 1)) == NULL)
return (NULL);
return (strcpy(t, s));
}
#endif /* !HAVE_STRDUP */
/*
* '_cups_strcasecmp()' - Do a case-insensitive comparison.
*/
#ifndef HAVE_STRCASECMP
int /* O - Result of comparison (-1, 0, or 1) */
_cups_strcasecmp(const char *s, /* I - First string */
const char *t) /* I - Second string */
{
while (*s != '\0' && *t != '\0')
{
if (tolower(*s & 255) < tolower(*t & 255))
return (-1);
else if (tolower(*s & 255) > tolower(*t & 255))
return (1);
s ++;
t ++;
}
if (*s == '\0' && *t == '\0')
return (0);
else if (*s != '\0')
return (1);
else
return (-1);
}
#endif /* !HAVE_STRCASECMP */
/*
* '_cups_strncasecmp()' - Do a case-insensitive comparison on up to N chars.
*/
#ifndef HAVE_STRNCASECMP
int /* O - Result of comparison (-1, 0, or 1) */
_cups_strncasecmp(const char *s, /* I - First string */
vconst char *t, /* I - Second string */
size_t n) /* I - Maximum number of characters to compare */
{
while (*s != '\0' && *t != '\0' && n > 0)
{
if (tolower(*s & 255) < tolower(*t & 255))
return (-1);
else if (tolower(*s & 255) > tolower(*t & 255))
return (1);
s ++;
t ++;
n --;
}
if (n == 0)
return (0);
else if (*s == '\0' && *t == '\0')
return (0);
else if (*s != '\0')
return (1);
else
return (-1);
}
#endif /* !HAVE_STRNCASECMP */
#ifndef HAVE_STRLCAT
/*
* '_cups_strlcat()' - Safely concatenate two strings.
*/
size_t /* O - Length of string */
_cups_strlcat(char *dst, /* O - Destination string */
const char *src, /* I - Source string */
size_t size) /* I - Size of destination string buffer */
{
size_t srclen; /* Length of source string */
size_t dstlen; /* Length of destination string */
/*
* Figure out how much room is left...
*/
dstlen = strlen(dst);
size -= dstlen + 1;
if (!size)
return (dstlen); /* No room, return immediately... */
/*
* Figure out how much room is needed...
*/
srclen = strlen(src);
/*
* Copy the appropriate amount...
*/
if (srclen > size)
srclen = size;
memcpy(dst + dstlen, src, srclen);
dst[dstlen + srclen] = '\0';
return (dstlen + srclen);
}
#endif /* !HAVE_STRLCAT */
#ifndef HAVE_STRLCPY
/*
* '_cups_strlcpy()' - Safely copy two strings.
*/
size_t /* O - Length of string */
_cups_strlcpy(char *dst, /* O - Destination string */
const char *src, /* I - Source string */
size_t size) /* I - Size of destination string buffer */
{
size_t srclen; /* Length of source string */
/*
* Figure out how much room is needed...
*/
size --;
srclen = strlen(src);
/*
* Copy the appropriate amount...
*/
if (srclen > size)
srclen = size;
memcpy(dst, src, srclen);
dst[srclen] = '\0';
return (srclen);
}
#endif /* !HAVE_STRLCPY */
/*
* End of "$Id: string.c 4683 2005-09-21 22:17:44Z mike $".
*/
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