trunk/Src/wptUtil.cpp

/* wptUtil.cpp - Helper functions
 *      Copyright (C) 2005 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT 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 
 * of the License, or (at your option) any later version.
 *  
 * WinPT 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 WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <stdio.h>
#include <ctype.h>

/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
char*
strsep (char **stringp, const char *delim)
{
    char *begin, *end;
    begin = *stringp;

    if (begin == NULL)
        return NULL;

    /* A frequent case is when the delimiter string contains only one
       character.  Here we don't need to call the expensive `strpbrk'
       function and instead work using `strchr'.  */
    if (delim[0] == '\0' || delim[1] == '\0') {
        char ch = delim[0];
        if (ch == '\0')
            end = NULL;
        else {
            if (*begin == ch)
                end = begin;                         
            else if (*begin == '\0')
                end = NULL;
            else
                end = strchr (begin + 1, ch);
        }  
    }
    else /* Find the end of the token.  */
        end = strpbrk (begin, delim);
    if ( end ){
        /* Terminate the token and set *STRINGP past NUL character.  */
        *end++ = '\0';
        *stringp = end;
    }
    else
        /* No more delimiters; this is the last token.  */
        *stringp = NULL;

    return begin;
}


/* Like strstr but this version is case in-sentensive. */
const char *
stristr (const char *buf, const char *sub)
{
    const char *t, *s ;
    size_t n;
    size_t buflen = strlen (buf);

    for( t=buf, n=buflen, s=sub ; n ; t++, n-- ) {
        if( toupper(*t) == toupper(*s) ) {
            for( buf=t++, buflen = n--, s++;
                 n && toupper(*t) == toupper(*s); t++, s++, n-- )
                ;
            if( !*s )
                return buf;
            t = buf; n = buflen; s = sub ;
        }
    }
    return NULL ;
}


/* Check if the email address @email only contain valid characters.
   Return 0 on success. */
int
check_email_address (const char *email)
{
    const char *allowed = "@._-%+";
    size_t i;

    if (!strchr (email, '@'))
        return -1;
    for (i=0; i < strlen (email); i++) {
        if (isdigit (email[i]) || isalpha (email[i])
            || strchr (allowed, email[i]))
            continue;
        else
            return -1;
    }
    return 0;
}
1	werner	36	/* wptUtil.cpp - Helper functions
2			* Copyright (C) 2005 Timo Schulz
3			*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20	twoaday	190
21	werner	36	#ifdef HAVE_CONFIG_H
22			#include <config.h>
23			#endif
24
25			#include <string.h>
26			#include <stdio.h>
27			#include <ctype.h>
28
29			/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
30	twoaday	190	char*
31	werner	36	strsep (char *stringp, const char delim)
32			{
33			char begin, end;
34			begin = *stringp;
35
36			if (begin == NULL)
37			return NULL;
38
39			/* A frequent case is when the delimiter string contains only one
40			character. Here we don't need to call the expensive `strpbrk'
41			function and instead work using `strchr'. */
42			if (delim[0] == '\0' \|\| delim[1] == '\0') {
43			char ch = delim[0];
44			if (ch == '\0')
45			end = NULL;
46			else {
47			if (*begin == ch)
48			end = begin;
49			else if (*begin == '\0')
50			end = NULL;
51			else
52			end = strchr (begin + 1, ch);
53			}
54			}
55			else /* Find the end of the token. */
56			end = strpbrk (begin, delim);
57			if ( end ){
58			/* Terminate the token and set STRINGP past NUL character. /
59			*end++ = '\0';
60			*stringp = end;
61			}
62			else
63			/* No more delimiters; this is the last token. */
64			*stringp = NULL;
65
66			return begin;
67			}
68
69
70			/* Like strstr but this version is case in-sentensive. */
71	twoaday	190	const char *
72	werner	36	stristr (const char buf, const char sub)
73			{
74			const char t, s ;
75			size_t n;
76			size_t buflen = strlen (buf);
77
78			for( t=buf, n=buflen, s=sub ; n ; t++, n-- ) {
79			if( toupper(t) == toupper(s) ) {
80			for( buf=t++, buflen = n--, s++;
81			n && toupper(t) == toupper(s); t++, s++, n-- )
82			;
83			if( !*s )
84			return buf;
85			t = buf; n = buflen; s = sub ;
86			}
87			}
88			return NULL ;
89			}
90
91	twoaday	190
92			/* Check if the email address @email only contain valid characters.
93			Return 0 on success. */
94			int
95			check_email_address (const char *email)
96			{
97			const char *allowed = "@._-%+";
98			size_t i;
99
100			if (!strchr (email, '@'))
101			return -1;
102			for (i=0; i < strlen (email); i++) {
103			if (isdigit (email[i]) \|\| isalpha (email[i])
104			\|\| strchr (allowed, email[i]))
105			continue;
106			else
107			return -1;
108			}
109			return 0;
110			}