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	werner	36	/* wptUtil.cpp - Helper functions
2	twoaday	328	* Copyright (C) 2005, 2006, 2008 Timo Schulz
3	werner	36	*
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	twoaday	271	#include <windows.h>
21	werner	36	#include <string.h>
22	twoaday	214	#include <stdlib.h>
23	werner	36	#include <stdio.h>
24			#include <ctype.h>
25
26	twoaday	271	#include "wptTypes.h"
27	twoaday	328	#include "StringBuffer.h"
28	twoaday	271
29	werner	36	/* 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	twoaday	217	if (end) {
58	werner	36	/* 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	twoaday	278	for (t=buf, n=buflen, s=sub ; n ; t++, n--) {
79			if (toupper (t) == toupper (s)) {
80	twoaday	328	for (buf=t++, buflen = n--, s++;
81			n && toupper(t) == toupper(s); t++, s++, n--)
82	werner	36	;
83	twoaday	278	if (!*s)
84	werner	36	return buf;
85	twoaday	328	t = buf;
86			n = buflen;
87			s = sub;
88	werner	36	}
89			}
90			return NULL ;
91			}
92
93	twoaday	190
94	twoaday	247	/* 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	twoaday	278	if (!is_path && (strchr (fname, ':') \|\| strchr (fname, '\\')))
104			return -1;
105	twoaday	247
106	twoaday	328	for (size_t i=0; i < strlen (fname); i++) {
107	twoaday	247	if (strchr (not_allowed, fname[i]))
108			return -1;
109			}
110			return 0;
111			}
112
113
114	twoaday	190	/* 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	twoaday	214	const char *allowed = "@._-%+;";
120	twoaday	260	size_t i, len = strlen (email);
121	twoaday	190
122	twoaday	260	if (len < 3 \|\| !strchr (email, '@'))
123	twoaday	190	return -1;
124	twoaday	260	for (i=0; i < len; i++) {
125	twoaday	225	if (isxdigit (email[i]) \|\| isalpha (email[i])
126	twoaday	190	\|\| strchr (allowed, email[i]))
127			continue;
128			else
129			return -1;
130			}
131			return 0;
132			}
133	twoaday	214
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	twoaday	225	p = new char[end-begin+1];
147	twoaday	214	if (!p)
148	twoaday	273	BUG (0);
149	twoaday	214	for (i = begin, pos=0; i < end; i++)
150			p[pos++] = str[i];
151			p[pos] = '\0';
152			return p;
153			}
154	twoaday	217
155
156
157	twoaday	271
158	twoaday	273	/* Safe strdup version (C++ version). */
159	twoaday	271	char*
160			m_strdup (const char *str)
161			{
162	twoaday	273	char *p = new char[strlen (str) + 1];
163	twoaday	271	if (!p)
164	twoaday	328	BUG (0);
165	twoaday	271	strcpy (p, str);
166			return p;
167			}