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/*
Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
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 3 of the License, 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "port/string.h"
/**
* strdup is not always part of the C library or they need insane flags to
* be set which would enable too many non-standard things.
*/
#if !defined HAVE_STRDUP || defined TEST_STRDUP
#include <stdlib.h> /* for malloc, NULL */
char *wolf_port_strdup( const char *s ) {
char *d;
d = (char *)malloc( strlen( s ) + 1 );
if( d == NULL ) return NULL;
strcpy( d, s );
return d;
}
#endif /* !defined HAVE_STRDUP || defined TEST_STRDUP */
/**
* strerror_r exists in various fassions (XSI and GNU flavour in glibc). We stick to
* the API of POSIX.1 of course (XSI-compliant)..
*/
#if !defined HAVE_STRERROR_R || defined TEST_STRERROR_R
#include "port/stdio.h" /* for snprintf */
#include "port/stdbool.h" /* for bool */
#include <sys/types.h> /* for size_t */
#include <errno.h> /* for errno */
#include "threads/mutex.h" /* for mutexes */
static bool mutex_initialized = false;
static wolf_mutex_t mutex;
int wolf_port_strerror_r( int num, char *buf, size_t buflen ) {
int safe_errno = errno;
const char *msg;
/* critical section as strerror is not thread-safe */
if( !mutex_initialized ) {
wolf_mutex_init( &mutex );
mutex_initialized = true;
}
wolf_mutex_lock( &mutex );
msg = strerror( num );
/* TODO: can we detect illegal error numbers? For sure on Linux NULL
* is never returned and a strcmp with prefix "Unknown error" or similar
* is not really acceptable.
*/
if( msg == NULL /* Solaris 8 */ ||
strncmp( msg, "Unknown error:", strlen( "Unknown error:" ) ) == 0 /* FreeBSD */ ) {
/* Linux returns an empty string in this case, why? */
(void)snprintf( buf, buflen, "Unknown error %d", num );
errno = EINVAL;
wolf_mutex_unlock( &mutex );
return -1;
}
strncpy( buf, msg, buflen-1 );
errno = safe_errno;
wolf_mutex_unlock( &mutex );
return 0;
}
#endif /* !defined HAVE_STRERROR_R || defined TEST_STRERROR_R */
/**
* str(n)casecmp is always around but on very old or strance C libraries.
* We should only use it in 7-bit ASCII places like in the protocol. In
* the Windows API they are called stri(n)cmp, so we have to map them
* anyway.
*/
#if !defined HAVE_STRCASECMP || defined TEST_STRCASECMP
#include <ctype.h> /* for tolower */
int wolf_port_strcasecmp( const char *s1, const char *s2 ) {
int c1, c2;
do {
c1 = tolower( (unsigned char)*s1 );
c2 = tolower( (unsigned char)*s2 );
s1++;
s2++;
} while( c1 == c2 && c1 != '\0' && c2 != '\0' );
return( c2 > c1 ? -1 : c1 > c2 );
}
#endif /* !defined HAVE_STRCASECMP || defined TEST_STRCASECMP */
#if !defined HAVE_STRNCASECMP || defined TEST_STRNCASECMP
#include <ctype.h> /* for tolower */
int wolf_port_strncasecmp( const char *s1, const char *s2, size_t n ) {
int c1, c2;
if( n == 0 )
return 0;
do {
c1 = tolower( (unsigned char)*s1 );
c2 = tolower( (unsigned char)*s2 );
s1++;
s2++;
n--;
} while( n > 0 && c1 == c2 && c1 != '\0' && c2 != '\0' );
return( c2 > c1 ? -1 : c1 > c2 );
}
#endif /* !defined HAVE_STRNCASECMP || defined TEST_STRNCASECMP */
#if !defined HAVE_STRLCPY || defined TEST_STRLCPY
size_t wolf_port_strlcpy( char *d, const char *s, size_t bufsize ) {
size_t len;
size_t ret;
if( !d || !s || bufsize <= 0 ) return 0;
len = strlen( s );
ret = len;
if( len >= bufsize ) {
len = bufsize-1;
}
memcpy( d, s, len );
d[len] = 0;
return ret;
}
#endif /* !defined HAVE_STRLCPY || defined TEST_STRLCPY */
#if !defined HAVE_STRLCAT || defined TEST_STRLCAT
size_t wolf_port_strlcat( char *d, const char *s, size_t bufsize ) {
size_t len1;
size_t len2;
size_t ret;
if( !d || !s || bufsize <= 0 ) return 0;
len1 = strlen( d );
len2 = strlen( s );
ret = len1+len2;
if( len1+len2 >= bufsize ) {
len2 = bufsize - (len1+1);
}
if( (int)len2 >= 0 ) {
memcpy( d+len1, s, len2 );
d[len1+len2] = 0;
}
return ret;
}
#endif /* !defined HAVE_STRLCAT || defined TEST_STRLCAT */
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