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/*
* "$Id: string.c 611 2005-01-11 21:37:42Z mike $"
*
* String functions for the ESP Package Manager (EPM).
*
* Copyright 1999-2005 by Easy Software Products.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Contents:
*
* epm_strdup() - Duplicate a string.
* epm_strcasecmp() - Do a case-insensitive comparison.
* epm_strlcat() - Safely concatenate two strings.
* epm_strlcpy() - Safely copy two strings.
* epm_strncasecmp() - Do a case-insensitive comparison on up to N chars.
*/
/*
* Include necessary headers...
*/
#include "epmstring.h"
/*
* 'epm_strdup()' - Duplicate a string.
*/
# ifndef HAVE_STRDUP
char * /* O - New string pointer */
epm_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 */
/*
* 'epm_strcasecmp()' - Do a case-insensitive comparison.
*/
# ifndef HAVE_STRCASECMP
int /* O - Result of comparison (-1, 0, or 1) */
epm_strcasecmp(const char *s, /* I - First string */
const char *t) /* I - Second string */
{
while (*s != '\0' && *t != '\0')
{
if (tolower(*s) < tolower(*t))
return (-1);
else if (tolower(*s) > tolower(*t))
return (1);
s ++;
t ++;
}
if (*s == '\0' && *t == '\0')
return (0);
else if (*s != '\0')
return (1);
else
return (-1);
}
# endif /* !HAVE_STRCASECMP */
#ifndef HAVE_STRLCAT
/*
* 'epm_strlcat()' - Safely concatenate two strings.
*/
size_t /* O - Length of string */
epm_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
/*
* 'epm_strlcpy()' - Safely copy two strings.
*/
size_t /* O - Length of string */
epm_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 */
/*
* 'epm_strncasecmp()' - Do a case-insensitive comparison on up to N chars.
*/
# ifndef HAVE_STRNCASECMP
int /* O - Result of comparison (-1, 0, or 1) */
epm_strncasecmp(const char *s, /* I - First string */
const 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) < tolower(*t))
return (-1);
else if (tolower(*s) > tolower(*t))
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 */
/*
* End of "$Id: string.c 611 2005-01-11 21:37:42Z mike $".
*/
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