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ver 2.1

/*************************************************************************
* (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
*  by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: tools.c,v 1.6 2011/10/31 13:53:51 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:

All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
	by Michael Pounov <misho@elwix.org>.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
   must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET 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 BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#include "global.h"
#include "aitio.h"


/*
 * io_LTrimStr() Remove left whitespaces from text string
 * @psLine = Text string
 * return: 0 nothing to do; !=0 Removed bytes
*/
inline int
io_LTrimStr(u_char * __restrict psLine)
{
	int pos = 0;
	u_char *s;

	if (!psLine || !*psLine)
		return 0;

	for (s = psLine; isspace(*s); s++);
	pos = s - psLine;

	memmove(psLine, s, (strlen((char*) psLine) - pos) + 1);
	return pos;
}

/*
 * io_RTrimStr() Remove right whitespaces from text string
 * @psLine = Text string
 * return: 0 nothing to do; !=0 Removed bytes
*/
inline int
io_RTrimStr(u_char * __restrict psLine)
{
	u_char *t, *pos;

	if (!psLine || !*psLine)
		return 0;

	pos = psLine + strlen((char*) psLine);
	for (t = pos - 1; t > psLine && isspace(*t); t--);
	*++t = 0;

	return pos - t;
}

/*
 * io_TrimStr() Remove left and right whitespaces from text string
 * @psLine = Text string
 * return: 0 nothing to do; !=0 Removed bytes
*/
inline int
io_TrimStr(u_char * __restrict psLine)
{
	int ret = 0;

	ret = io_LTrimStr(psLine);
	ret += io_RTrimStr(psLine);

	return ret;
}

/*
 * io_UnquotStr() Remove quots from input text string 
 * @psLine = Text string
 * return: 0 nothing to do; 1 successful unquoted string
*/
inline int
io_UnquotStr(u_char * __restrict psLine)
{
	char *pos, *str = NULL;
	int flg;

	if (!psLine)
		return 0;

	switch (*psLine) {
		case '`':
		case '"':
		case '\'':
			str = strdup((char*) psLine + 1);
			for (pos = str, flg = 0; *pos; flg = ('\\' == *pos), pos++) {
				if (!flg && *pos == *psLine) {
					*pos = 0;
					strlcpy((char*) psLine, str, strlen((char*) psLine) + 1);
					break;
				}
			}
			free(str);
			return 1;
	}

	return 0;
}

/*
 * io_Ch2Hex() Convert from Char string to Hex string
 * @psLine = Text string
 * @lineLen = Length of Text string
 * return: NULL nothing to do or error; !=0 Allocated new converted data without term\0 (must be free)
*/
inline u_char *
io_Ch2Hex(u_char *psLine, int lineLen)
{
	register int i;
	char szWork[3];
	u_char *str;

	if (!psLine || !*psLine || !lineLen)
		return NULL;

	str = malloc(lineLen / 2);
	if (!str) {
		LOGERR;
		return NULL;
	} else
		memset(str, 0, lineLen / 2);

	for (i = 0; i < lineLen && psLine[i * 2]; i++) {
		strlcpy(szWork, (char*) &psLine[i * 2], 3);
		str[i] = (u_char) strtol(szWork, NULL, 16);
	}

	return str;
}


/*
 * io_Hex2Ch() Convert from Hex string to Char string
 * @psLine = Text string
 * @lineLen = Length of Text string
 * return: NULL nothing to do or error; !=0 Allocated new converted string(must be free)
*/
inline char *
io_Hex2Ch(u_char *psLine, int lineLen)
{
	register int i;
	char szWork[3], *str;

	if (!psLine || !*psLine || !lineLen)
		return NULL;

	str = malloc(lineLen * 2 + 1);
	if (!str) {
		LOGERR;
		return NULL;
	} else
		memset(str, 0, lineLen * 2 + 1);

	for (i = 0; i <= lineLen; i++) {
		memset(szWork, 0, 3);
		snprintf(szWork, 3, "%02X", (u_char) psLine[i]);
		strncat(str, szWork, 2);
	}

	return str;
}

/*
 * io_CopyEnv() Copy environment to new environment array;
 * @oldenv = Environment array
 * return: NULL error; !=NULL Allocated new environment array(must be free)
*/
char **
io_CopyEnv(const char **oldenv)
{
	char **newenv, **el;
	register int i, num;

	if (!oldenv)
		return NULL;
	else
		newenv = el = NULL;

	/* count items environment */
	for (i = num = 0; oldenv[i]; i++)
		if (*strchr(oldenv[i], '='))
			num++;

	/* create and copy new environment */
	newenv = calloc(num + 1, sizeof(char*));
	if (!newenv) {
		LOGERR;
		return NULL;
	} else
		el = newenv;

	for (i = 0; oldenv[i]; i++)
		if (*strchr(oldenv[i], '=')) {
			*el = strdup(oldenv[i]);
			el++;
		}
	*el = NULL;

	return newenv;
}

/*
 * io_ExecArgs() Build exec arguments from other array
 * @psProg = Program name for execute
 * @oldarg = Arguments array
 * return: NULL error; !=NULL Allocated execution array(must be free)
*/
char **
io_ExecArgs(const char *psProg, const char **oldarg)
{
	char **newarg, **el;
	register int i, num;

	if (!psProg || !oldarg)
		return NULL;
	else
		newarg = el = NULL;

	/* count items arguments */
	for (num = 0; oldarg[num]; num++);

	/* create and copy new arguments */
	newarg = calloc(num + 2, sizeof(char*));
	if (!newarg) {
		LOGERR;
		return NULL;
	} else
		el = newarg;

	*el = strdup(psProg);
	el++;

	for (i = 0; oldarg[i]; i++, el++)
		*el = strdup(oldarg[i]);
	*el = NULL;

	return newarg;
}

/*
 * io_FreeNullTerm() Free dynamic allocated null terminated array with strings
 * @arr = Pointer to array for free
 * return: none
*/
inline void
io_FreeNullTerm(char *** __restrict arr)
{
	char **a;

	if (arr && *arr) {
		a = *arr;
		while (a && *a)
			free(*a++);
		free(*arr);
		*arr = NULL;
	}
}

/*
 * io_ether_ntoa() Convert ethernet address to string
 * @n = ethernet address structure, like struct ether_addr
 * @a = string
 * @len = string length
 * return: NULL error or !=NULL string a
 */
inline char *
io_ether_ntoa(const struct io_ether_addr *n, char * __restrict a, int len)
{
	if (!n || !a)
		return NULL;

	memset(a, 0, len);
	if (snprintf(a, len, "%02x:%02x:%02x:%02x:%02x:%02x", 
			n->ether_addr_octet[0], n->ether_addr_octet[1], 
			n->ether_addr_octet[2], n->ether_addr_octet[3], 
			n->ether_addr_octet[4], n->ether_addr_octet[5]) < 17)
		return NULL;

	return a;
}

/*
 * io_ether_aton() Convert string to ethernet address
 * @a = string
 * @e = ethernet address structure, like struct ether_addr
 * return: NULL error or !=NULL ethernet address structure
 */
inline struct io_ether_addr *
io_ether_aton(const char *a, struct io_ether_addr *e)
{                       
	int i;
	u_int o0, o1, o2, o3, o4, o5;

	if (!a || !e)
		return NULL;

	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o3, &o4, &o5);
	if (i != 6)
		return NULL;

	e->ether_addr_octet[0] = o0;
	e->ether_addr_octet[1] = o1;
	e->ether_addr_octet[2] = o2;
	e->ether_addr_octet[3] = o3;
	e->ether_addr_octet[4] = o4;
	e->ether_addr_octet[5] = o5;

	return e;
}