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, len = strlen (email);

    if (len < 3 || !strchr (email, '@'))
        return -1;
    for (i=0; i < len; 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	/* 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
21	#ifdef HAVE_CONFIG_H
22	#include <config.h>
23	#endif
24
25	#include <string.h>
26	#include <stdlib.h>
27	#include <stdio.h>
28	#include <ctype.h>
29
30	/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
31	char*
32	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	if (end) {
59	/* 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	const char *
73	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
93	/* 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	/* 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	const char *allowed = "@._-%+;";
122	size_t i, len = strlen (email);
123
124	if (len < 3 \|\| !strchr (email, '@'))
125	return -1;
126	for (i=0; i < len; i++) {
127	if (isxdigit (email[i]) \|\| isalpha (email[i])
128	\|\| strchr (allowed, email[i]))
129	continue;
130	else
131	return -1;
132	}
133	return 0;
134	}
135
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	p = new char[end-begin+1];
149	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
158
159	/* Remove %AB sequences from the input buffer @in
160	and store the raw data in @out. */
161	void
162	unhexify_buffer (const char in, char *r_out)
163	{
164	char temp[3], *out;
165	size_t len, pos, i=0;
166
167	len = strlen (in);
168	out = new char[len+1];
169	if (!out)
170	abort ();
171	memset (out, 0, len+1);
172	for (pos = 0; pos < len; pos++) {
173	if (in[pos] == '%' && in[pos+1] == '%')
174	out[i++] = '%';
175	else if (in[pos] == '%') {
176	temp[0] = in[++pos];
177	temp[1] = in[++pos];
178	temp[2] = 0;
179	out[i++] = (char)strtoul (temp, NULL, 16);
180	}
181	else
182	out[i++] = in[pos];
183	}
184	out[i] = 0;
185	*r_out = out;
186	}