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 <stdlib.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 @fname is a valid file name on a Window file system.
   If is_path = 1, @fname is treated as a file name without any separators. */
int
check_file_name (const char *fname, int is_path)
{
    const char *not_allowed = "/*?\"<>|";
    size_t i;

    /* If we are not in path mode (@is_path = 1) we also consider
       path separators as illegal chars. */
    if (!is_path) {
        if (strchr (fname, ':') || strchr (fname, '\\'))
            return -1;
    }

    for (i=0; i < strlen (fname); i++) {
        if (strchr (not_allowed, fname[i]))
            return -1;
    }
    return 0;
}


/* 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 (isxdigit (email[i]) || isalpha (email[i])
            || strchr (allowed, email[i]))
            continue;
        else
            return -1;
    }
    return 0;
}


/* Return a substring of @str from the position @begin
   to position @end. */
char*
substr (const char *str, unsigned int begin, unsigned int end)
{    
    char *p;
    size_t i, pos;

    if (end > strlen (str) || begin > strlen (str) || (end-begin) < 0)
        return NULL;

    p = new char[end-begin+1];
    if (!p)
        abort ();

    for (i = begin, pos=0; i < end; i++)
        p[pos++] = str[i];
    p[pos] = '\0';
    return p;
}


/* Remove %AB sequences from the input buffer @in
   and store the raw data in @out. */
void
unhexify_buffer (const char *in, char **r_out)
{
    char temp[3], *out;
    size_t len, pos, i=0;

    len = strlen (in);
    out = new char[len+1];
    if (!out)
        abort ();
    memset (out, 0, len+1);
    for (pos = 0; pos < len; pos++) {
        if (in[pos] == '%' && in[pos+1] == '%')
            out[i++] = '%';
        else if (in[pos] == '%') {
            temp[0] = in[++pos];
            temp[1] = in[++pos];
            temp[2] = 0;
            out[i++] = (char)strtoul (temp, NULL, 16);
        }
        else
            out[i++] = in[pos];
    }
    out[i] = 0;
    *r_out = out;
}
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	twoaday	214	#include <stdlib.h>
27	werner	36	#include <stdio.h>
28			#include <ctype.h>
29
30			/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
31	twoaday	190	char*
32	werner	36	strsep (char *stringp, const char delim)
33			{
34			char begin, end;
35			begin = *stringp;
36
37			if (begin == NULL)
38			return NULL;
39
40			/* A frequent case is when the delimiter string contains only one
41			character. Here we don't need to call the expensive `strpbrk'
42			function and instead work using `strchr'. */
43			if (delim[0] == '\0' \|\| delim[1] == '\0') {
44			char ch = delim[0];
45			if (ch == '\0')
46			end = NULL;
47			else {
48			if (*begin == ch)
49			end = begin;
50			else if (*begin == '\0')
51			end = NULL;
52			else
53			end = strchr (begin + 1, ch);
54			}
55			}
56			else /* Find the end of the token. */
57			end = strpbrk (begin, delim);
58	twoaday	217	if (end) {
59	werner	36	/* Terminate the token and set STRINGP past NUL character. /
60			*end++ = '\0';
61			*stringp = end;
62			}
63			else
64			/* No more delimiters; this is the last token. */
65			*stringp = NULL;
66
67			return begin;
68			}
69
70
71			/* Like strstr but this version is case in-sentensive. */
72	twoaday	190	const char *
73	werner	36	stristr (const char buf, const char sub)
74			{
75			const char t, s ;
76			size_t n;
77			size_t buflen = strlen (buf);
78
79			for( t=buf, n=buflen, s=sub ; n ; t++, n-- ) {
80			if( toupper(t) == toupper(s) ) {
81			for( buf=t++, buflen = n--, s++;
82			n && toupper(t) == toupper(s); t++, s++, n-- )
83			;
84			if( !*s )
85			return buf;
86			t = buf; n = buflen; s = sub ;
87			}
88			}
89			return NULL ;
90			}
91
92	twoaday	190
93	twoaday	247	/* Check if @fname is a valid file name on a Window file system.
94			If is_path = 1, @fname is treated as a file name without any separators. */
95			int
96			check_file_name (const char *fname, int is_path)
97			{
98			const char not_allowed = "/?\"<>\|";
99			size_t i;
100
101			/* If we are not in path mode (@is_path = 1) we also consider
102			path separators as illegal chars. */
103			if (!is_path) {
104			if (strchr (fname, ':') \|\| strchr (fname, '\\'))
105			return -1;
106			}
107
108			for (i=0; i < strlen (fname); i++) {
109			if (strchr (not_allowed, fname[i]))
110			return -1;
111			}
112			return 0;
113			}
114
115
116	twoaday	190	/* Check if the email address @email only contain valid characters.
117			Return 0 on success. */
118			int
119			check_email_address (const char *email)
120			{
121	twoaday	214	const char *allowed = "@._-%+;";
122	twoaday	190	size_t i;
123
124			if (!strchr (email, '@'))
125			return -1;
126			for (i=0; i < strlen (email); i++) {
127	twoaday	225	if (isxdigit (email[i]) \|\| isalpha (email[i])
128	twoaday	190	\|\| strchr (allowed, email[i]))
129			continue;
130			else
131			return -1;
132			}
133			return 0;
134			}
135	twoaday	214
136
137			/* Return a substring of @str from the position @begin
138			to position @end. */
139			char*
140			substr (const char *str, unsigned int begin, unsigned int end)
141			{
142			char *p;
143			size_t i, pos;
144
145			if (end > strlen (str) \|\| begin > strlen (str) \|\| (end-begin) < 0)
146			return NULL;
147
148	twoaday	225	p = new char[end-begin+1];
149	twoaday	214	if (!p)
150			abort ();
151
152			for (i = begin, pos=0; i < end; i++)
153			p[pos++] = str[i];
154			p[pos] = '\0';
155			return p;
156			}
157	twoaday	217
158
159			/* Remove %AB sequences from the input buffer @in
160			and store the raw data in @out. */
161			void
162	twoaday	225	unhexify_buffer (const char in, char *r_out)
163	twoaday	217	{
164	twoaday	225	char temp[3], *out;
165			size_t len, pos, i=0;
166	twoaday	217
167	twoaday	225	len = strlen (in);
168			out = new char[len+1];
169			if (!out)
170	twoaday	217	abort ();
171	twoaday	225	memset (out, 0, len+1);
172			for (pos = 0; pos < len; pos++) {
173	twoaday	217	if (in[pos] == '%' && in[pos+1] == '%')
174	twoaday	225	out[i++] = '%';
175	twoaday	217	else if (in[pos] == '%') {
176			temp[0] = in[++pos];
177			temp[1] = in[++pos];
178			temp[2] = 0;
179	twoaday	225	out[i++] = (char)strtoul (temp, NULL, 16);
180	twoaday	217	}
181			else
182	twoaday	225	out[i++] = in[pos];
183	twoaday	217	}
184	twoaday	225	out[i] = 0;
185			*r_out = out;
186	twoaday	217	}