trunk/Src/wptUtil.cpp

/* wptUtil.cpp - Helper functions
 *      Copyright (C) 2005, 2006, 2008 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.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

#include "wptTypes.h"
#include "StringBuffer.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 = "/*?\"<>|";

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

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


/* Safe strdup version (C++ version). */
char*
m_strdup (const char *str)
{
    char *p = new char[strlen (str) + 1];
    if (!p)
        BUG (0);
    strcpy (p, str);
    return p;
}
1	/* wptUtil.cpp - Helper functions
2	* Copyright (C) 2005, 2006, 2008 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	#ifdef HAVE_CONFIG_H
17	#include <config.h>
18	#endif
19
20	#include <windows.h>
21	#include <string.h>
22	#include <stdlib.h>
23	#include <stdio.h>
24	#include <ctype.h>
25
26	#include "wptTypes.h"
27	#include "StringBuffer.h"
28
29	/* code taken from glibc-2.2.1/sysdeps/generic/strsep.c */
30	char*
31	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	const char *
72	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;
86	n = buflen;
87	s = sub;
88	}
89	}
90	return NULL ;
91	}
92
93
94	/* Check if @fname is a valid file name on a Window file system.
95	If is_path = 1, @fname is treated as a file name without any separators. */
96	int
97	check_file_name (const char *fname, int is_path)
98	{
99	const char not_allowed = "/?\"<>\|";
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 && (strchr (fname, ':') \|\| strchr (fname, '\\')))
104	return -1;
105
106	for (size_t i=0; i < strlen (fname); i++) {
107	if (strchr (not_allowed, fname[i]))
108	return -1;
109	}
110	return 0;
111	}
112
113
114	/* Check if the email address @email only contain valid characters.
115	Return 0 on success. */
116	int
117	check_email_address (const char *email)
118	{
119	const char *allowed = "@._-%+;";
120	size_t i, len = strlen (email);
121
122	if (len < 3 \|\| !strchr (email, '@'))
123	return -1;
124	for (i=0; i < len; i++) {
125	if (isxdigit (email[i]) \|\| isalpha (email[i])
126	\|\| strchr (allowed, email[i]))
127	continue;
128	else
129	return -1;
130	}
131	return 0;
132	}
133
134
135	/* Return a substring of @str from the position @begin
136	to position @end. */
137	char*
138	substr (const char *str, unsigned int begin, unsigned int end)
139	{
140	char *p;
141	size_t i, pos;
142
143	if (end > strlen (str) \|\| begin > strlen (str) \|\| (end-begin) < 0)
144	return NULL;
145
146	p = new char[end-begin+1];
147	if (!p)
148	BUG (0);
149	for (i = begin, pos=0; i < end; i++)
150	p[pos++] = str[i];
151	p[pos] = '\0';
152	return p;
153	}
154
155
156
157
158	/* Safe strdup version (C++ version). */
159	char*
160	m_strdup (const char *str)
161	{
162	char *p = new char[strlen (str) + 1];
163	if (!p)
164	BUG (0);
165	strcpy (p, str);
166	return p;
167	}