/claws-mail-3.8.1/src/common/utils.c

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/*
 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
 * Copyright (C) 1999-2012 Hiroyuki Yamamoto & The Claws Mail Team
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include "defs.h"

#include <glib.h>

#include <glib/gi18n.h>

#ifdef USE_PTHREAD
#include <pthread.h>
#endif

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/param.h>

#if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
#  include <wchar.h>
#  include <wctype.h>
#endif
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdarg.h>
#include <sys/types.h>
#if HAVE_SYS_WAIT_H
#  include <sys/wait.h>
#endif
#include <dirent.h>
#include <time.h>
#include <regex.h>

#ifdef G_OS_UNIX
#include <sys/utsname.h>
#endif

#include <fcntl.h>

#ifdef G_OS_WIN32
#  include <direct.h>
#  include <io.h>
#  include <w32lib.h>
#endif

#ifdef MAEMO
#include <libosso.h>
#ifdef CHINOOK
# include <tablet-browser-interface.h>
#else
# include <osso-browser-interface.h>
#endif
#endif

#include "utils.h"
#include "socket.h"
#include "../codeconv.h"

#define BUFFSIZE	8192

static gboolean debug_mode = FALSE;
#ifdef G_OS_WIN32
static GSList *tempfiles=NULL;
#endif

/* Return true if we are running as root.  This function should beused
   instead of getuid () == 0.  */
gboolean superuser_p (void)
{
#ifdef G_OS_WIN32
  return w32_is_administrator ();
#else
  return !getuid();
#endif  
}



#if !GLIB_CHECK_VERSION(2, 7, 0) && !defined(G_OS_UNIX)
gint g_chdir(const gchar *path)
{
#ifdef G_OS_WIN32
	if (G_WIN32_HAVE_WIDECHAR_API()) {
		wchar_t *wpath;
		gint retval;
		gint save_errno;

		wpath = g_utf8_to_utf16(path, -1, NULL, NULL, NULL);
		if (wpath == NULL) {
			errno = EINVAL;
			return -1;
		}

		retval = _wchdir(wpath);
		save_errno = errno;

		g_free(wpath);

		errno = save_errno;
		return retval;
	} else {
		gchar *cp_path;
		gint retval;
		gint save_errno;

		cp_path = g_locale_from_utf8(path, -1, NULL, NULL, NULL);
		if (cp_path == NULL) {
			errno = EINVAL;
			return -1;
		}

		retval = chdir(cp_path);
		save_errno = errno;

		g_free(cp_path);

		errno = save_errno;
		return retval;
	}
#else
	return chdir(path);
#endif
}

gint g_chmod(const gchar *path, gint mode)
{
#ifdef G_OS_WIN32
	if (G_WIN32_HAVE_WIDECHAR_API()) {
		wchar_t *wpath;
		gint retval;
		gint save_errno;

		wpath = g_utf8_to_utf16(path, -1, NULL, NULL, NULL);
		if (wpath == NULL) {
			errno = EINVAL;
			return -1;
		}

		retval = _wchmod(wpath, mode);
		save_errno = errno;

		g_free(wpath);

		errno = save_errno;
		return retval;
	} else {
		gchar *cp_path;
		gint retval;
		gint save_errno;

		cp_path = g_locale_from_utf8(path, -1, NULL, NULL, NULL);
		if (cp_path == NULL) {
			errno = EINVAL;
			return -1;
		}

		retval = chmod(cp_path, mode);
		save_errno = errno;

		g_free(cp_path);

		errno = save_errno;
		return retval;
	}
#else
	return chmod(path, mode);
#endif
}

FILE* g_fopen(const gchar *filename, const gchar *mode)
{
#ifdef G_OS_WIN32
	char *name = g_win32_locale_filename_from_utf8(filename);
	FILE* fp = fopen(name, mode);
	g_free(name);
	return fp;
#else
	return fopen(filename, mode);
#endif
}
int g_open(const gchar *filename, int flags, int mode)
{
#ifdef G_OS_WIN32
	char *name = g_win32_locale_filename_from_utf8(filename);
	int fd = open(name, flags, mode);
	g_free(name);
	return fp;
#else
	return open(filename, flags, mode);
#endif
}
#endif /* GLIB_CHECK_VERSION && G_OS_UNIX */


#ifdef G_OS_WIN32
gint mkstemp_name(gchar *template, gchar **name_used)
{
	static gulong count=0; /* W32-_mktemp only supports up to 27
				  tempfiles... */
	int tmpfd;

	*name_used = g_strdup_printf("%s.%ld",_mktemp(template),count++);
	tmpfd = g_open (*name_used, (O_CREAT | O_RDWR | O_BINARY),
				    (S_IRUSR | S_IWUSR));

	tempfiles=g_slist_append(tempfiles, g_strdup(*name_used));
	if (tmpfd<0) {
		perror(g_strdup_printf("cant create %s",*name_used));
		return -1;
	}
	else
		return tmpfd;
}
#endif /* G_OS_WIN32 */

#ifdef G_OS_WIN32
gint mkstemp(gchar *template)
{
	gchar *dummyname;
	gint res = mkstemp_name(template, &dummyname);
	g_free(dummyname);
	return res;
}
#endif /* G_OS_WIN32 */

void list_free_strings(GList *list)
{
	list = g_list_first(list);

	while (list != NULL) {
		g_free(list->data);
		list = list->next;
	}
}

void slist_free_strings(GSList *list)
{
	while (list != NULL) {
		g_free(list->data);
		list = list->next;
	}
}

static void hash_free_strings_func(gpointer key, gpointer value, gpointer data)
{
	g_free(key);
}

void hash_free_strings(GHashTable *table)
{
	g_hash_table_foreach(table, hash_free_strings_func, NULL);
}

gint str_case_equal(gconstpointer v, gconstpointer v2)
{
	return g_ascii_strcasecmp((const gchar *)v, (const gchar *)v2) == 0;
}

guint str_case_hash(gconstpointer key)
{
	const gchar *p = key;
	guint h = *p;

	if (h) {
		h = g_ascii_tolower(h);
		for (p += 1; *p != '\0'; p++)
			h = (h << 5) - h + g_ascii_tolower(*p);
	}

	return h;
}

void ptr_array_free_strings(GPtrArray *array)
{
	gint i;
	gchar *str;

	cm_return_if_fail(array != NULL);

	for (i = 0; i < array->len; i++) {
		str = g_ptr_array_index(array, i);
		g_free(str);
	}
}

gint to_number(const gchar *nstr)
{
	register const gchar *p;

	if (*nstr == '\0') return -1;

	for (p = nstr; *p != '\0'; p++)
		if (!g_ascii_isdigit(*p)) return -1;

	return atoi(nstr);
}

/* convert integer into string,
   nstr must be not lower than 11 characters length */
gchar *itos_buf(gchar *nstr, gint n)
{
	g_snprintf(nstr, 11, "%d", n);
	return nstr;
}

/* convert integer into string */
gchar *itos(gint n)
{
	static gchar nstr[11];

	return itos_buf(nstr, n);
}

#define divide(num,divisor,i,d)		\
{					\
	i = num >> divisor;		\
	d = num & ((1<<divisor)-1);	\
	d = (d*100) >> divisor;		\
}


/*!
 * \brief Convert a given size in bytes in a human-readable string
 *
 * \param size  The size expressed in bytes to convert in string
 * \return      The string that respresents the size in an human-readable way
 */
gchar *to_human_readable(goffset size)
{
	static gchar str[14];
	static gchar *b_format = NULL, *kb_format = NULL, 
		     *mb_format = NULL, *gb_format = NULL;
	register int t = 0, r = 0;
	if (b_format == NULL) {
		b_format  = _("%dB");
		kb_format = _("%d.%02dKB");
		mb_format = _("%d.%02dMB");
		gb_format = _("%.2fGB");
	}
	
	if (size < (goffset)1024) {
		g_snprintf(str, sizeof(str), b_format, (gint)size);
		return str;
	} else if (size >> 10 < (goffset)1024) {
		divide(size, 10, t, r);
		g_snprintf(str, sizeof(str), kb_format, t, r);
		return str;
	} else if (size >> 20 < (goffset)1024) {
		divide(size, 20, t, r);
		g_snprintf(str, sizeof(str), mb_format, t, r);
		return str;
	} else {
		g_snprintf(str, sizeof(str), gb_format, (gfloat)(size >> 30));
		return str;
	}
}

/* strcmp with NULL-checking */
gint strcmp2(const gchar *s1, const gchar *s2)
{
	if (s1 == NULL || s2 == NULL)
		return -1;
	else
		return strcmp(s1, s2);
}
/* strstr with NULL-checking */
gchar *strstr2(const gchar *s1, const gchar *s2)
{
	if (s1 == NULL || s2 == NULL)
		return NULL;
	else
		return strstr(s1, s2);
}
/* compare paths */
gint path_cmp(const gchar *s1, const gchar *s2)
{
	gint len1, len2;
	int rc;
#ifdef G_OS_WIN32
	gchar *s1buf, *s2buf;
#endif

	if (s1 == NULL || s2 == NULL) return -1;
	if (*s1 == '\0' || *s2 == '\0') return -1;

#ifdef G_OS_WIN32
	s1buf = g_strdup (s1);
	s2buf = g_strdup (s2);
	subst_char (s1buf, '/', G_DIR_SEPARATOR);
	subst_char (s2buf, '/', G_DIR_SEPARATOR);
	s1 = s1buf;
	s2 = s2buf;
#endif /* !G_OS_WIN32 */

	len1 = strlen(s1);
	len2 = strlen(s2);

	if (s1[len1 - 1] == G_DIR_SEPARATOR) len1--;
	if (s2[len2 - 1] == G_DIR_SEPARATOR) len2--;

	rc = strncmp(s1, s2, MAX(len1, len2));
#ifdef G_OS_WIN32
	g_free (s1buf);
	g_free (s2buf);
#endif /* !G_OS_WIN32 */
	return rc;
}

/* remove trailing return code */
gchar *strretchomp(gchar *str)
{
	register gchar *s;

	if (!*str) return str;

	for (s = str + strlen(str) - 1;
	     s >= str && (*s == '\n' || *s == '\r');
	     s--)
		*s = '\0';

	return str;
}

/* remove trailing character */
gchar *strtailchomp(gchar *str, gchar tail_char)
{
	register gchar *s;

	if (!*str) return str;
	if (tail_char == '\0') return str;

	for (s = str + strlen(str) - 1; s >= str && *s == tail_char; s--)
		*s = '\0';

	return str;
}

/* remove CR (carriage return) */
gchar *strcrchomp(gchar *str)
{
	register gchar *s;

	if (!*str) return str;

	s = str + strlen(str) - 1;
	if (*s == '\n' && s > str && *(s - 1) == '\r') {
		*(s - 1) = '\n';
		*s = '\0';
	}

	return str;
}

gint file_strip_crs(const gchar *file)
{
	FILE *fp = NULL, *outfp = NULL;
	gchar buf[4096];
	gchar *out = get_tmp_file();
	if (file == NULL)
		goto freeout;

	fp = g_fopen(file, "rb");
	if (!fp)
		goto freeout;

	outfp = g_fopen(out, "wb");
	if (!outfp) {
		fclose(fp);
		goto freeout;
	}

	while (fgets(buf, sizeof (buf), fp) != NULL) {
		strcrchomp(buf);
		if (fputs(buf, outfp) == EOF) {
			fclose(fp);
			fclose(outfp);
			goto unlinkout;
		}
	}

	fclose(fp);
	if (fclose(outfp) == EOF) {
		goto unlinkout;
	}
	
	if (move_file(out, file, TRUE) < 0)
		goto unlinkout;
	
	g_free(out);
	return 0;
unlinkout:
	claws_unlink(out);
freeout:
	g_free(out);
	return -1;
}

/* Similar to `strstr' but this function ignores the case of both strings.  */
gchar *strcasestr(const gchar *haystack, const gchar *needle)
{
	register size_t haystack_len, needle_len;

	haystack_len = strlen(haystack);
	needle_len   = strlen(needle);

	if (haystack_len < needle_len || needle_len == 0)
		return NULL;

	while (haystack_len >= needle_len) {
		if (!g_ascii_strncasecmp(haystack, needle, needle_len))
			return (gchar *)haystack;
		else {
			haystack++;
			haystack_len--;
		}
	}

	return NULL;
}

gpointer my_memmem(gconstpointer haystack, size_t haystacklen,
		   gconstpointer needle, size_t needlelen)
{
	const gchar *haystack_ = (const gchar *)haystack;
	const gchar *needle_ = (const gchar *)needle;
	const gchar *haystack_cur = (const gchar *)haystack;
	size_t haystack_left = haystacklen;

	if (needlelen == 1)
		return memchr(haystack_, *needle_, haystacklen);

	while ((haystack_cur = memchr(haystack_cur, *needle_, haystack_left))
	       != NULL) {
		if (haystacklen - (haystack_cur - haystack_) < needlelen)
			break;
		if (memcmp(haystack_cur + 1, needle_ + 1, needlelen - 1) == 0)
			return (gpointer)haystack_cur;
		else{
			haystack_cur++;
			haystack_left = haystacklen - (haystack_cur - haystack_);
		}
	}

	return NULL;
}

/* Copy no more than N characters of SRC to DEST, with NULL terminating.  */
gchar *strncpy2(gchar *dest, const gchar *src, size_t n)
{
	register const gchar *s = src;
	register gchar *d = dest;

	while (--n && *s)
		*d++ = *s++;
	*d = '\0';

	return dest;
}


/* Examine if next block is non-ASCII string */
gboolean is_next_nonascii(const gchar *s)
{
	const gchar *p;

	/* skip head space */
	for (p = s; *p != '\0' && g_ascii_isspace(*p); p++)
		;
	for (; *p != '\0' && !g_ascii_isspace(*p); p++) {
		if (*(guchar *)p > 127 || *(guchar *)p < 32)
			return TRUE;
	}

	return FALSE;
}

gint get_next_word_len(const gchar *s)
{
	gint len = 0;

	for (; *s != '\0' && !g_ascii_isspace(*s); s++, len++)
		;

	return len;
}

static void trim_subject_for_compare(gchar *str)
{
	gchar *srcp;

	eliminate_parenthesis(str, '[', ']');
	eliminate_parenthesis(str, '(', ')');
	g_strstrip(str);

	srcp = str + subject_get_prefix_length(str);
	if (srcp != str)
		memmove(str, srcp, strlen(srcp) + 1);
}

static void trim_subject_for_sort(gchar *str)
{
	gchar *srcp;

	g_strstrip(str);

	srcp = str + subject_get_prefix_length(str);
	if (srcp != str)
		memmove(str, srcp, strlen(srcp) + 1);
}

/* compare subjects */
gint subject_compare(const gchar *s1, const gchar *s2)
{
	gchar *str1, *str2;

	if (!s1 || !s2) return -1;
	if (!*s1 || !*s2) return -1;

	Xstrdup_a(str1, s1, return -1);
	Xstrdup_a(str2, s2, return -1);

	trim_subject_for_compare(str1);
	trim_subject_for_compare(str2);

	if (!*str1 || !*str2) return -1;

	return strcmp(str1, str2);
}

gint subject_compare_for_sort(const gchar *s1, const gchar *s2)
{
	gchar *str1, *str2;

	if (!s1 || !s2) return -1;

	Xstrdup_a(str1, s1, return -1);
	Xstrdup_a(str2, s2, return -1);

	trim_subject_for_sort(str1);
	trim_subject_for_sort(str2);

	return g_utf8_collate(str1, str2);
}

void trim_subject(gchar *str)
{
	register gchar *srcp;
	gchar op, cl;
	gint in_brace;

	g_strstrip(str);

	srcp = str + subject_get_prefix_length(str);

	if (*srcp == '[') {
		op = '[';
		cl = ']';
	} else if (*srcp == '(') {
		op = '(';
		cl = ')';
	} else
		op = 0;

	if (op) {
		++srcp;
		in_brace = 1;
		while (*srcp) {
			if (*srcp == op)
				in_brace++;
			else if (*srcp == cl)
				in_brace--;
			srcp++;
			if (in_brace == 0)
				break;
		}
	}
	while (g_ascii_isspace(*srcp)) srcp++;
	memmove(str, srcp, strlen(srcp) + 1);
}

void eliminate_parenthesis(gchar *str, gchar op, gchar cl)
{
	register gchar *srcp, *destp;
	gint in_brace;

	srcp = destp = str;

	while ((destp = strchr(destp, op))) {
		in_brace = 1;
		srcp = destp + 1;
		while (*srcp) {
			if (*srcp == op)
				in_brace++;
			else if (*srcp == cl)
				in_brace--;
			srcp++;
			if (in_brace == 0)
				break;
		}
		while (g_ascii_isspace(*srcp)) srcp++;
		memmove(destp, srcp, strlen(srcp) + 1);
	}
}

void extract_parenthesis(gchar *str, gchar op, gchar cl)
{
	register gchar *srcp, *destp;
	gint in_brace;

	srcp = destp = str;

	while ((srcp = strchr(destp, op))) {
		if (destp > str)
			*destp++ = ' ';
		memmove(destp, srcp + 1, strlen(srcp));
		in_brace = 1;
		while(*destp) {
			if (*destp == op)
				in_brace++;
			else if (*destp == cl)
				in_brace--;

			if (in_brace == 0)
				break;

			destp++;
		}
	}
	*destp = '\0';
}

static void extract_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
					 gchar op, gchar cl)
{
	register gchar *srcp, *destp;
	gint in_brace;
	gboolean in_quote = FALSE;

	srcp = destp = str;

	while ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
		if (destp > str)
			*destp++ = ' ';
		memmove(destp, srcp + 1, strlen(srcp));
		in_brace = 1;
		while(*destp) {
			if (*destp == op && !in_quote)
				in_brace++;
			else if (*destp == cl && !in_quote)
				in_brace--;
			else if (*destp == quote_chr)
				in_quote ^= TRUE;

			if (in_brace == 0)
				break;

			destp++;
		}
	}
	*destp = '\0';
}

void extract_quote(gchar *str, gchar quote_chr)
{
	register gchar *p;

	if ((str = strchr(str, quote_chr))) {
		p = str;
		while ((p = strchr(p + 1, quote_chr)) && (p[-1] == '\\')) {
			memmove(p - 1, p, strlen(p) + 1);
			p--;
		}
		if(p) {
			*p = '\0';
			memmove(str, str + 1, p - str);
		}
	}
}

void eliminate_address_comment(gchar *str)
{
	register gchar *srcp, *destp;
	gint in_brace;

	srcp = destp = str;

	while ((destp = strchr(destp, '"'))) {
		if ((srcp = strchr(destp + 1, '"'))) {
			srcp++;
			if (*srcp == '@') {
				destp = srcp + 1;
			} else {
				while (g_ascii_isspace(*srcp)) srcp++;
				memmove(destp, srcp, strlen(srcp) + 1);
			}
		} else {
			*destp = '\0';
			break;
		}
	}

	srcp = destp = str;

	while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
		in_brace = 1;
		srcp = destp + 1;
		while (*srcp) {
			if (*srcp == '(')
				in_brace++;
			else if (*srcp == ')')
				in_brace--;
			srcp++;
			if (in_brace == 0)
				break;
		}
		while (g_ascii_isspace(*srcp)) srcp++;
		memmove(destp, srcp, strlen(srcp) + 1);
	}
}

gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
{
	gboolean in_quote = FALSE;

	while (*str) {
		if (*str == c && !in_quote)
			return (gchar *)str;
		if (*str == quote_chr)
			in_quote ^= TRUE;
		str++;
	}

	return NULL;
}

void extract_address(gchar *str)
{
	eliminate_address_comment(str);
	if (strchr_with_skip_quote(str, '"', '<'))
		extract_parenthesis_with_skip_quote(str, '"', '<', '>');
	g_strstrip(str);
}

void extract_list_id_str(gchar *str)
{
	if (strchr_with_skip_quote(str, '"', '<'))
		extract_parenthesis_with_skip_quote(str, '"', '<', '>');
	g_strstrip(str);
}

static GSList *address_list_append_real(GSList *addr_list, const gchar *str, gboolean removecomments)
{
	gchar *work;
	gchar *workp;

	if (!str) return addr_list;

	Xstrdup_a(work, str, return addr_list);

	if (removecomments)
		eliminate_address_comment(work);
	workp = work;

	while (workp && *workp) {
		gchar *p, *next;

		if ((p = strchr_with_skip_quote(workp, '"', ','))) {
			*p = '\0';
			next = p + 1;
		} else
			next = NULL;

		if (removecomments && strchr_with_skip_quote(workp, '"', '<'))
			extract_parenthesis_with_skip_quote
				(workp, '"', '<', '>');

		g_strstrip(workp);
		if (*workp)
			addr_list = g_slist_append(addr_list, g_strdup(workp));

		workp = next;
	}

	return addr_list;
}

GSList *address_list_append(GSList *addr_list, const gchar *str)
{
	return address_list_append_real(addr_list, str, TRUE);
}

GSList *address_list_append_with_comments(GSList *addr_list, const gchar *str)
{
	return address_list_append_real(addr_list, str, FALSE);
}

GSList *references_list_prepend(GSList *msgid_list, const gchar *str)
{
	const gchar *strp;

	if (!str) return msgid_list;
	strp = str;

	while (strp && *strp) {
		const gchar *start, *end;
		gchar *msgid;

		if ((start = strchr(strp, '<')) != NULL) {
			end = strchr(start + 1, '>');
			if (!end) break;
		} else
			break;

		msgid = g_strndup(start + 1, end - start - 1);
		g_strstrip(msgid);
		if (*msgid)
			msgid_list = g_slist_prepend(msgid_list, msgid);
		else
			g_free(msgid);

		strp = end + 1;
	}

	return msgid_list;
}

GSList *references_list_append(GSList *msgid_list, const gchar *str)
{
	GSList *list;

	list = references_list_prepend(NULL, str);
	list = g_slist_reverse(list);
	msgid_list = g_slist_concat(msgid_list, list);

	return msgid_list;
}

GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
{
	gchar *work;
	gchar *workp;

	if (!str) return group_list;

	Xstrdup_a(work, str, return group_list);

	workp = work;

	while (workp && *workp) {
		gchar *p, *next;

		if ((p = strchr_with_skip_quote(workp, '"', ','))) {
			*p = '\0';
			next = p + 1;
		} else
			next = NULL;

		g_strstrip(workp);
		if (*workp)
			group_list = g_slist_append(group_list,
						    g_strdup(workp));

		workp = next;
	}

	return group_list;
}

GList *add_history(GList *list, const gchar *str)
{
	GList *old;
	gchar *oldstr;

	cm_return_val_if_fail(str != NULL, list);

	old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)strcmp2);
	if (old) {
		oldstr = old->data;
		list = g_list_remove(list, old->data);
		g_free(oldstr);
	} else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
		GList *last;

		last = g_list_last(list);
		if (last) {
			oldstr = last->data;
			list = g_list_remove(list, last->data);
			g_free(oldstr);
		}
	}

	list = g_list_prepend(list, g_strdup(str));

	return list;
}

void remove_return(gchar *str)
{
	register gchar *p = str;

	while (*p) {
		if (*p == '\n' || *p == '\r')
			memmove(p, p + 1, strlen(p));
		else
			p++;
	}
}

void remove_space(gchar *str)
{
	register gchar *p = str;
	register gint spc;

	while (*p) {
		spc = 0;
		while (g_ascii_isspace(*(p + spc)))
			spc++;
		if (spc)
			memmove(p, p + spc, strlen(p + spc) + 1);
		else
			p++;
	}
}

void unfold_line(gchar *str)
{
	register gchar *p = str;
	register gint spc;

	while (*p) {
		if (*p == '\n' || *p == '\r') {
			*p++ = ' ';
			spc = 0;
			while (g_ascii_isspace(*(p + spc)))
				spc++;
			if (spc)
				memmove(p, p + spc, strlen(p + spc) + 1);
		} else
			p++;
	}
}

void subst_char(gchar *str, gchar orig, gchar subst)
{
	register gchar *p = str;

	while (*p) {
		if (*p == orig)
			*p = subst;
		p++;
	}
}

void subst_chars(gchar *str, gchar *orig, gchar subst)
{
	register gchar *p = str;

	while (*p) {
		if (strchr(orig, *p) != NULL)
			*p = subst;
		p++;
	}
}

void subst_for_filename(gchar *str)
{
	if (!str)
		return;
#ifdef G_OS_WIN32
	subst_chars(str, "\t\r\n\\/*:", '_');
#else
	subst_chars(str, "\t\r\n\\/*", '_');
#endif
}

void subst_for_shellsafe_filename(gchar *str)
{
	if (!str)
		return;
	subst_for_filename(str);
	subst_chars(str, " \"'|&;()<>'!{}[]",'_');
}

gboolean is_ascii_str(const gchar *str)
{
	const guchar *p = (const guchar *)str;

	while (*p != '\0') {
		if (*p != '\t' && *p != ' ' &&
		    *p != '\r' && *p != '\n' &&
		    (*p < 32 || *p >= 127))
			return FALSE;
		p++;
	}

	return TRUE;
}

static const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
{
	gchar * position = NULL;
	gchar * tmp_pos = NULL;
	int i;

	if (quote_chars == NULL)
		return NULL;

	for (i = 0; i < strlen(quote_chars); i++) {
		tmp_pos = strrchr (str,	quote_chars[i]);
		if(position == NULL
		   || (tmp_pos != NULL && position <= tmp_pos) )
			position = tmp_pos;
	}
	return position;
}

gint get_quote_level(const gchar *str, const gchar *quote_chars)
{
	const gchar *first_pos;
	const gchar *last_pos;
	const gchar *p = str;
	gint quote_level = -1;

	/* speed up line processing by only searching to the last '>' */
	if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
		/* skip a line if it contains a '<' before the initial '>' */
		if (memchr(str, '<', first_pos - str) != NULL)
			return -1;
		last_pos = line_has_quote_char_last(first_pos, quote_chars);
	} else
		return -1;

	while (p <= last_pos) {
		while (p < last_pos) {
			if (g_ascii_isspace(*p))
				p++;
			else
				break;
		}

		if (strchr(quote_chars, *p))
			quote_level++;
		else if (*p != '-' && !g_ascii_isspace(*p) && p <= last_pos) {
			/* any characters are allowed except '-','<' and space */
			while (*p != '-' && *p != '<'
			       && !strchr(quote_chars, *p)
			       && !g_ascii_isspace(*p)
			       && p < last_pos)
				p++;
			if (strchr(quote_chars, *p))
				quote_level++;
			else
				break;
		}

		p++;
	}

	return quote_level;
}

gint check_line_length(const gchar *str, gint max_chars, gint *line)
{
	const gchar *p = str, *q;
	gint cur_line = 0, len;

	while ((q = strchr(p, '\n')) != NULL) {
		len = q - p + 1;
		if (len > max_chars) {
			if (line)
				*line = cur_line;
			return -1;
		}
		p = q + 1;
		++cur_line;
	}

	len = strlen(p);
	if (len > max_chars) {
		if (line)
			*line = cur_line;
		return -1;
	}

	return 0;
}

const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
{
	gchar * position = NULL;
	gchar * tmp_pos = NULL;
	int i;

	if (quote_chars == NULL)
		return FALSE;

	for (i = 0; i < strlen(quote_chars); i++) {
		tmp_pos = strchr (str,	quote_chars[i]);
		if(position == NULL
		   || (tmp_pos != NULL && position >= tmp_pos) )
			position = tmp_pos;
	}
	return position;
}

static gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
{
	register guint haystack_len, needle_len;
	gboolean in_squote = FALSE, in_dquote = FALSE;

	haystack_len = strlen(haystack);
	needle_len   = strlen(needle);

	if (haystack_len < needle_len || needle_len == 0)
		return NULL;

	while (haystack_len >= needle_len) {
		if (!in_squote && !in_dquote &&
		    !strncmp(haystack, needle, needle_len))
			return (gchar *)haystack;

		/* 'foo"bar"' -> foo"bar"
		   "foo'bar'" -> foo'bar' */
		if (*haystack == '\'') {
			if (in_squote)
				in_squote = FALSE;
			else if (!in_dquote)
				in_squote = TRUE;
		} else if (*haystack == '\"') {
			if (in_dquote)
				in_dquote = FALSE;
			else if (!in_squote)
				in_dquote = TRUE;
		}

		haystack++;
		haystack_len--;
	}

	return NULL;
}

gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
			    gint max_tokens)
{
	GSList *string_list = NULL, *slist;
	gchar **str_array, *s, *new_str;
	guint i, n = 1, len;

	cm_return_val_if_fail(str != NULL, NULL);
	cm_return_val_if_fail(delim != NULL, NULL);

	if (max_tokens < 1)
		max_tokens = G_MAXINT;

	s = strstr_with_skip_quote(str, delim);
	if (s) {
		guint delimiter_len = strlen(delim);

		do {
			len = s - str;
			new_str = g_strndup(str, len);

			if (new_str[0] == '\'' || new_str[0] == '\"') {
				if (new_str[len - 1] == new_str[0]) {
					new_str[len - 1] = '\0';
					memmove(new_str, new_str + 1, len - 1);
				}
			}
			string_list = g_slist_prepend(string_list, new_str);
			n++;
			str = s + delimiter_len;
			s = strstr_with_skip_quote(str, delim);
		} while (--max_tokens && s);
	}

	if (*str) {
		new_str = g_strdup(str);
		if (new_str[0] == '\'' || new_str[0] == '\"') {
			len = strlen(str);
			if (new_str[len - 1] == new_str[0]) {
				new_str[len - 1] = '\0';
				memmove(new_str, new_str + 1, len - 1);
			}
		}
		string_list = g_slist_prepend(string_list, new_str);
		n++;
	}

	str_array = g_new(gchar*, n);

	i = n - 1;

	str_array[i--] = NULL;
	for (slist = string_list; slist; slist = slist->next)
		str_array[i--] = slist->data;

	g_slist_free(string_list);

	return str_array;
}

gchar *get_abbrev_newsgroup_name(const gchar *group, gint len)
{
	gchar *abbrev_group;
	gchar *ap;
	const gchar *p = group;
	const gchar *last;

	cm_return_val_if_fail(group != NULL, NULL);

	last = group + strlen(group);
	abbrev_group = ap = g_malloc(strlen(group) + 1);

	while (*p) {
		while (*p == '.')
			*ap++ = *p++;
		if ((ap - abbrev_group) + (last - p) > len && strchr(p, '.')) {
			*ap++ = *p++;
			while (*p != '.') p++;
		} else {
			strcpy(ap, p);
			return abbrev_group;
		}
	}

	*ap = '\0';
	return abbrev_group;
}

gchar *trim_string(const gchar *str, gint len)
{
	const gchar *p = str;
	gint mb_len;
	gchar *new_str;
	gint new_len = 0;

	if (!str) return NULL;
	if (strlen(str) <= len)
		return g_strdup(str);
	if (g_utf8_validate(str, -1, NULL) == FALSE)
		return g_strdup(str);

	while (*p != '\0') {
		mb_len = g_utf8_skip[*(guchar *)p];
		if (mb_len == 0)
			break;
		else if (new_len + mb_len > len)
			break;

		new_len += mb_len;
		p += mb_len;
	}

	Xstrndup_a(new_str, str, new_len, return g_strdup(str));
	return g_strconcat(new_str, "...", NULL);
}

GList *uri_list_extract_filenames(const gchar *uri_list)
{
	GList *result = NULL;
	const gchar *p, *q;
	gchar *escaped_utf8uri;

	p = uri_list;

	while (p) {
		if (*p != '#') {
			while (g_ascii_isspace(*p)) p++;
			if (!strncmp(p, "file:", 5)) {
				q = p;
				q += 5;
				while (*q && *q != '\n' && *q != '\r') q++;

				if (q > p) {
					gchar *file, *locale_file = NULL;
					q--;
					while (q > p && g_ascii_isspace(*q))
						q--;
					Xalloca(escaped_utf8uri, q - p + 2,
						return result);
					Xalloca(file, q - p + 2,
						return result);
					*file = '\0';
					strncpy(escaped_utf8uri, p, q - p + 1);
					escaped_utf8uri[q - p + 1] = '\0';
					decode_uri(file, escaped_utf8uri);
		    /*
		     * g_filename_from_uri() rejects escaped/locale encoded uri
		     * string which come from Nautilus.
		     */
#ifndef G_OS_WIN32
					if (g_utf8_validate(file, -1, NULL))
						locale_file
							= conv_codeset_strdup(
								file + 5,
								CS_UTF_8,
								conv_get_locale_charset_str());
					if (!locale_file)
						locale_file = g_strdup(file + 5);
#else
					locale_file = g_filename_from_uri(file, NULL, NULL);
#endif
					result = g_list_append(result, locale_file);
				}
			}
		}
		p = strchr(p, '\n');
		if (p) p++;
	}

	return result;
}

/* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
 * characters
 */
static gint axtoi(const gchar *hexstr)
{
	gint hi, lo, result;

	hi = hexstr[0];
	if ('0' <= hi && hi <= '9') {
		hi -= '0';
	} else
		if ('a' <= hi && hi <= 'f') {
			hi -= ('a' - 10);
		} else
			if ('A' <= hi && hi <= 'F') {
				hi -= ('A' - 10);
			}

	lo = hexstr[1];
	if ('0' <= lo && lo <= '9') {
		lo -= '0';
	} else
		if ('a' <= lo && lo <= 'f') {
			lo -= ('a'-10);
		} else
			if ('A' <= lo && lo <= 'F') {
				lo -= ('A' - 10);
			}
	result = lo + (16 * hi);
	return result;
}

gboolean is_uri_string(const gchar *str)
{
	while (str && *str && g_ascii_isspace(*str))
		str++;
	return (g_ascii_strncasecmp(str, "http://", 7) == 0 ||
		g_ascii_strncasecmp(str, "https://", 8) == 0 ||
		g_ascii_strncasecmp(str, "ftp://", 6) == 0 ||
		g_ascii_strncasecmp(str, "www.", 4) == 0);
}

gchar *get_uri_path(const gchar *uri)
{
	while (uri && *uri && g_ascii_isspace(*uri))
		uri++;
	if (g_ascii_strncasecmp(uri, "http://", 7) == 0)
		return (gchar *)(uri + 7);
	else if (g_ascii_strncasecmp(uri, "https://", 8) == 0)
		return (gchar *)(uri + 8);
	else if (g_ascii_strncasecmp(uri, "ftp://", 6) == 0)
		return (gchar *)(uri + 6);
	else
		return (gchar *)uri;
}

gint get_uri_len(const gchar *str)
{
	const gchar *p;

	if (is_uri_string(str)) {
		for (p = str; *p != '\0'; p++) {
			if (!g_ascii_isgraph(*p) || strchr("()<>\"", *p))
				break;
		}
		return p - str;
	}

	return 0;
}

/* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
 * plusses, and escape characters are used)
 */
void decode_uri_with_plus(gchar *decoded_uri, const gchar *encoded_uri, gboolean with_plus)
{
	gchar *dec = decoded_uri;
	const gchar *enc = encoded_uri;

	while (*enc) {
		if (*enc == '%') {
			enc++;
			if (isxdigit((guchar)enc[0]) &&
			    isxdigit((guchar)enc[1])) {
				*dec = axtoi(enc);
				dec++;
				enc += 2;
			}
		} else {
			if (with_plus && *enc == '+')
				*dec = ' ';
			else
				*dec = *enc;
			dec++;
			enc++;
		}
	}

	*dec = '\0';
}

void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
{
	decode_uri_with_plus(decoded_uri, encoded_uri, TRUE);
}

static gchar *decode_uri_gdup(const gchar *encoded_uri)
{
    gchar *buffer = g_malloc(strlen(encoded_uri)+1);
    decode_uri_with_plus(buffer, encoded_uri, FALSE);
    return buffer;
}

gint scan_mailto_url(const gchar *mailto, gchar **from, gchar **to, gchar **cc, gchar **bcc,
		     gchar **subject, gchar **body, gchar ***attach, gchar **inreplyto)
{
	gchar *tmp_mailto;
	gchar *p;
	const gchar *forbidden_uris[] = { ".gnupg/",
					  "/etc/passwd",
					  "/etc/shadow",
					  ".ssh/",
					  "../",
					  NULL };
	gint num_attach = 0;
	gchar **my_att = NULL;

	Xstrdup_a(tmp_mailto, mailto, return -1);

	if (!strncmp(tmp_mailto, "mailto:", 7))
		tmp_mailto += 7;

	p = strchr(tmp_mailto, '?');
	if (p) {
		*p = '\0';
		p++;
	}

	if (to && !*to)
		*to = decode_uri_gdup(tmp_mailto);

	my_att = g_malloc(sizeof(char *));
	my_att[0] = NULL;

	while (p) {
		gchar *field, *value;

		field = p;

		p = strchr(p, '=');
		if (!p) break;
		*p = '\0';
		p++;

		value = p;

		p = strchr(p, '&');
		if (p) {
			*p = '\0';
			p++;
		}

		if (*value == '\0') continue;

		if (from && !g_ascii_strcasecmp(field, "from")) {
			if (!*from) {
				*from = decode_uri_gdup(value);
			} else {
				gchar *tmp = decode_uri_gdup(value);
				gchar *new_from = g_strdup_printf("%s, %s", *from, tmp);
				g_free(*from);
				*from = new_from;
			}
		} else if (cc && !g_ascii_strcasecmp(field, "cc")) {
			if (!*cc) {
				*cc = decode_uri_gdup(value);
			} else {
				gchar *tmp = decode_uri_gdup(value);
				gchar *new_cc = g_strdup_printf("%s, %s", *cc, tmp);
				g_free(*cc);
				*cc = new_cc;
			}
		} else if (bcc && !g_ascii_strcasecmp(field, "bcc")) {
			if (!*bcc) {
				*bcc = decode_uri_gdup(value);
			} else {
				gchar *tmp = decode_uri_gdup(value);
				gchar *new_bcc = g_strdup_printf("%s, %s", *bcc, tmp);
				g_free(*bcc);
				*bcc = new_bcc;
			}
		} else if (subject && !*subject &&
			   !g_ascii_strcasecmp(field, "subject")) {
			*subject = decode_uri_gdup(value);
		} else if (body && !*body && !g_ascii_strcasecmp(field, "body")) {
			*body = decode_uri_gdup(value);
		} else if (body && !*body && !g_ascii_strcasecmp(field, "insert")) {
			gchar *tmp = decode_uri_gdup(value);
			if (!g_file_get_contents(tmp, body, NULL, NULL)) {
				g_warning("Error: couldn't set insert file '%s' in body\n", value);
			}
			g_free(tmp);
			tmp = NULL;
		} else if (attach && !g_ascii_strcasecmp(field, "attach")) {
			int i = 0;
			gchar *tmp = decode_uri_gdup(value);
			for (; forbidden_uris[i]; i++) {
				if (strstr(tmp, forbidden_uris[i])) {
					g_print("Refusing to attach '%s', potential private data leak\n",
							tmp);
					g_free(tmp);
					tmp = NULL;
					break;
				}
			}
			if (tmp) {
				/* attach is correct */
				num_attach++;
				my_att = g_realloc(my_att, (sizeof(char *))*(num_attach+1));
				my_att[num_attach-1] = tmp;
				my_att[num_attach] = NULL;
			}
		} else if (inreplyto && !*inreplyto &&
			   !g_ascii_strcasecmp(field, "in-reply-to")) {
			*inreplyto = decode_uri_gdup(value);
		}
	}

	if (attach)
		*attach = my_att;
	return 0;
}


#ifdef G_OS_WIN32
#include <windows.h>
#ifndef CSIDL_APPDATA
#define CSIDL_APPDATA 0x001a
#endif
#ifndef CSIDL_LOCAL_APPDATA
#define CSIDL_LOCAL_APPDATA 0x001c
#endif
#ifndef CSIDL_FLAG_CREATE
#define CSIDL_FLAG_CREATE 0x8000
#endif
#define DIM(v)		     (sizeof(v)/sizeof((v)[0]))

#define RTLD_LAZY 0
const char *
w32_strerror (int w32_errno)
{
  static char strerr[256];
  int ec = (int)GetLastError ();

  if (w32_errno == 0)
    w32_errno = ec;
  FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, w32_errno,
		 MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
		 strerr, DIM (strerr)-1, NULL);
  return strerr;
}

static __inline__ void *
dlopen (const char * name, int flag)
{
  void * hd = LoadLibrary (name);
  return hd;
}

static __inline__ void *
dlsym (void * hd, const char * sym)
{
  if (hd && sym)
    {
      void * fnc = GetProcAddress (hd, sym);
      if (!fnc)
	return NULL;
      return fnc;
    }
  return NULL;
}


static __inline__ const char *
dlerror (void)
{
  return w32_strerror (0);
}


static __inline__ int
dlclose (void * hd)
{
  if (hd)
    {
      FreeLibrary (hd);
      return 0;
    }
  return -1;
}

static HRESULT
w32_shgetfolderpath (HWND a, int b, HANDLE c, DWORD d, LPSTR e)
{
  static int initialized;
  static HRESULT (WINAPI * func)(HWND,int,HANDLE,DWORD,LPSTR);

  if (!initialized)
    {
      static char *dllnames[] = { "shell32.dll", "shfolder.dll", NULL };
      void *handle;
      int i;

      initialized = 1;

      for (i=0, handle = NULL; !handle && dllnames[i]; i++)
	{
	  handle = dlopen (dllnames[i], RTLD_LAZY);
	  if (handle)
	    {
	      func = dlsym (handle, "SHGetFolderPathW");
	      if (!func)
		{
		  dlclose (handle);
		  handle = NULL;
		}
	    }
	}
    }

  if (func)
    return func (a,b,c,d,e);
  else
    return -1;
}

/* Returns a static string with the directroy from which the module
   has been loaded.  Returns an empty string on error. */
static char *w32_get_module_dir(void)
{
	static char *moddir;

	if (!moddir) {
		char name[MAX_PATH+10];
		char *p;

		if ( !GetModuleFileNameA (0, name, sizeof (name)-10) )
			*name = 0;
		else {
			p = strrchr (name, '\\');
			if (p)
				*p = 0;
			else
				*name = 0;
		}
		moddir = g_strdup (name);
	}
	return moddir;
}
#endif /* G_OS_WIN32 */

/* Return a static string with the locale dir. */
const gchar *get_locale_dir(void)
{
	static gchar *loc_dir;

#ifdef G_OS_WIN32
	if (!loc_dir)
		loc_dir = g_strconcat(w32_get_module_dir(), G_DIR_SEPARATOR_S,
				      "\\share\\locale", NULL);
#endif
	if (!loc_dir)
		loc_dir = LOCALEDIR;
	
	return loc_dir;
}


const gchar *get_home_dir(void)
{
#ifdef G_OS_WIN32
	static char home_dir_utf16[MAX_PATH] = "";
	static gchar *home_dir_utf8 = NULL;
	if (home_dir_utf16[0] == '\0') {
		if (w32_shgetfolderpath
			    (NULL, CSIDL_APPDATA|CSIDL_FLAG_CREATE,
			     NULL, 0, home_dir_utf16) < 0)
				strcpy (home_dir_utf16, "C:\\Sylpheed");
		home_dir_utf8 = g_utf16_to_utf8 ((const gunichar *)home_dir_utf16, -1, NULL, NULL, NULL);
	}
	return home_dir_utf8;
#else
	static const gchar *homeenv = NULL;

	if (homeenv)
		return homeenv;

	if (!homeenv && g_getenv("HOME") != NULL)
		homeenv = g_strdup(g_getenv("HOME"));
	if (!homeenv)
		homeenv = g_get_home_dir();

	return homeenv;
#endif
}

static gchar *claws_rc_dir = NULL;
static gboolean rc_dir_alt = FALSE;
const gchar *get_rc_dir(void)
{

	if (!claws_rc_dir)
		claws_rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
				     RC_DIR, NULL);

	return claws_rc_dir;
}

void set_rc_dir(const gchar *dir)
{
	if (claws_rc_dir != NULL) {
		g_print("Error: rc_dir already set\n");
	} else {
		rc_dir_alt = TRUE;
		if (g_path_is_absolute(dir))
			claws_rc_dir = g_strdup(dir);
		else {
			claws_rc_dir = g_strconcat(g_get_current_dir(),
				G_DIR_SEPARATOR_S, dir, NULL);
		}
		debug_print("set rc_dir to %s\n", claws_rc_dir);
		if (!is_dir_exist(claws_rc_dir)) {
			if (make_dir_hier(claws_rc_dir) != 0) {
				g_print("Error: can't create %s\n",
				claws_rc_dir);
			}
		}
	}
}

gboolean rc_dir_is_alt(void) {
	return rc_dir_alt;
}

const gchar *get_mail_base_dir(void)
{
	return get_home_dir();
}

#ifdef MAEMO
const gchar *prefs_common_get_data_root(void);
gchar *last_data_root = NULL;
#endif

const gchar *get_news_cache_dir(void)
{
	static gchar *news_cache_dir = NULL;
#ifdef MAEMO
	const gchar *data_root = prefs_common_get_data_root();
	if (strcmp2(data_root, last_data_root)) {
		g_free(news_cache_dir);
		news_cache_dir = NULL;
	}
#endif
	if (!news_cache_dir)
#ifndef MAEMO
		news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					     NEWS_CACHE_DIR, NULL);
#else
	{
		if (data_root) {
			news_cache_dir = g_strconcat(data_root, G_DIR_SEPARATOR_S,
					     "Claws", G_DIR_SEPARATOR_S, 
					     g_get_user_name(), G_DIR_SEPARATOR_S,
					     NEWS_CACHE_DIR, NULL);
			g_free(last_data_root);
			last_data_root = g_strdup(last_data_root);
		} else {
			news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					     NEWS_CACHE_DIR, NULL);
			g_free(last_data_root);
			last_data_root = NULL;
		}
	}
#endif
	return news_cache_dir;
}

const gchar *get_imap_cache_dir(void)
{
	static gchar *imap_cache_dir = NULL;
#ifdef MAEMO
	const gchar *data_root = prefs_common_get_data_root();
	if (strcmp2(data_root, last_data_root)) {
		g_free(imap_cache_dir);
		imap_cache_dir = NULL;
	}
#endif

	if (!imap_cache_dir)
#ifndef MAEMO
		imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					     IMAP_CACHE_DIR, NULL);
#else
	{
		if (data_root) {
			imap_cache_dir = g_strconcat(data_root, G_DIR_SEPARATOR_S,
					     "Claws", G_DIR_SEPARATOR_S, 
					     g_get_user_name(), G_DIR_SEPARATOR_S,
					     IMAP_CACHE_DIR, NULL);
			g_free(last_data_root);
			last_data_root = g_strdup(last_data_root);
		} else {
			imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					     IMAP_CACHE_DIR, NULL);
			g_free(last_data_root);
			last_data_root = NULL;
		}
	}
#endif

	return imap_cache_dir;
}

const gchar *get_mime_tmp_dir(void)
{
	static gchar *mime_tmp_dir = NULL;

	if (!mime_tmp_dir)
		mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					   MIME_TMP_DIR, NULL);

	return mime_tmp_dir;
}

const gchar *get_template_dir(void)
{
	static gchar *template_dir = NULL;

	if (!template_dir)
		template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
					   TEMPLATE_DIR, NULL);

	return template_dir;
}

#ifdef G_OS_WIN32
const gchar *get_cert_file(void)
{
	const gchar *cert_file = NULL;
	if (!cert_file)
		cert_file = g_strconcat(w32_get_module_dir(),
				 "\\share\\claws-mail\\",
				"ca-certificates.crt",
				NULL);	
	return cert_file;
}
#endif

/* Return the filepath of the claws-mail.desktop file */
const gchar *get_desktop_file(void)
{
#ifdef DESKTOPFILEPATH
  return DESKTOPFILEPATH;
#else
  return NULL;
#endif
}

/* Return the default directory for Plugins. */
const gchar *get_plugin_dir(void)
{
#ifdef G_OS_WIN32
	static gchar *plugin_dir = NULL;

	if (!plugin_dir)
		plugin_dir = g_strconcat(w32_get_module_dir(),
					 "\\lib\\claws-mail\\plugins\\",
					 NULL);
	return plugin_dir;
#else
	if (is_dir_exist(PLUGINDIR))
		return PLUGINDIR;
	else {
		static gchar *plugin_dir = NULL;
		if (!plugin_dir)
			plugin_dir = g_strconcat(get_rc_dir(), 
				G_DIR_SEPARATOR_S, "plugins", 
				G_DIR_SEPARATOR_S, NULL);
		return plugin_dir;			
	}
#endif
}


#ifdef G_OS_WIN32
/* Return the default directory for Themes. */
const gchar *get_themes_dir(void)
{
	static gchar *themes_dir = NULL;

	if (!themes_dir)
		themes_dir = g_strconcat(w32_get_module_dir(),
					 "\\share\\claws-mail\\themes",
					 NULL);
	return themes_dir;
}
#endif

const gchar *get_tmp_dir(void)
{
	static gchar *tmp_dir = NULL;

	if (!tmp_dir)
		tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
				      TMP_DIR, NULL);

	return tmp_dir;
}

gchar *get_tmp_file(void)
{
	gchar *tmp_file;
	static guint32 id = 0;

	tmp_file = g_strdup_printf("%s%ctmpfile.%08x",
				   get_tmp_dir(), G_DIR_SEPARATOR, id++);

	return tmp_file;
}

const gchar *get_domain_name(void)
{
#ifdef G_OS_UNIX
	static gchar *domain_name = NULL;

	if (!domain_name) {
		struct hostent *hp;
		char hostname[256];

		if (gethostname(hostname, sizeof(hostname)) != 0) {
			perror("gethostname");
			domain_name = "unknown";
		} else {
			hostname[sizeof(hostname) - 1] = '\0';
			if ((hp = my_gethostbyname(hostname)) == NULL) {
				perror("gethostbyname");
				domain_name = g_strdup(hostname);
			} else {
				domain_name = g_strdup(hp->h_name);
			}
		}
		debug_print("domain name = %s\n", domain_name);
	}

	return domain_name;
#else
	return "unknown";
#endif
}

off_t get_file_size(const gchar *file)
{
	struct stat s;

	if (g_stat(file, &s) < 0) {
		FILE_OP_ERROR(file, "stat");
		return -1;
	}

	return s.st_size;
}

time_t get_file_mtime(const gchar *file)
{
	struct stat s;

	if (g_stat(file, &s) < 0) {
		FILE_OP_ERROR(file, "stat");
		return -1;
	}

	return s.st_mtime;
}

off_t get_file_size_as_crlf(const gchar *file)
{
	FILE *fp;
	off_t size = 0;
	gchar buf[BUFFSIZE];

	if ((fp = g_fopen(file, "rb")) == NULL) {
		FILE_OP_ERROR(file, "g_fopen");
		return -1;
	}

	while (fgets(buf, sizeof(buf), fp) != NULL) {
		strretchomp(buf);
		size += strlen(buf) + 2;
	}

	if (ferror(fp)) {
		FILE_OP_ERROR(file, "fgets");
		size = -1;
	}

	fclose(fp);

	return size;
}

gboolean file_exist(const gchar *file, gboolean allow_fifo)
{
	struct stat s;

	if (file == NULL)
		return FALSE;

	if (g_stat(file, &s) < 0) {
		if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
		return FALSE;
	}

	if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
		return TRUE;

	return FALSE;
}


/* Test on whether FILE is a relative file name. This is
 * straightforward for Unix but more complex for Windows. */
gboolean is_relative_filename(const gchar *file)
{
	if (!file)
		return TRUE;
#ifdef G_OS_WIN32
	if ( *file == '\\' && file[1] == '\\' && strchr (file+2, '\\') )
		return FALSE; /* Prefixed with a hostname - this can't
			       * be a relative name. */

	if ( ((*file >= 'a' && *file <= 'z')
	      || (*file >= 'A' && *file <= 'Z'))
	     && file[1] == ':')
		file += 2;  /* Skip drive letter. */

	return !(*file == '\\' || *file == '/');
#else
	return !(*file == G_DIR_SEPARATOR);
#endif
}


gboolean is_dir_exist(const gchar *dir)
{
	if (dir == NULL)
		return FALSE;

	return g_file_test(dir, G_FILE_TEST_IS_DIR);
}

gboolean is_file_entry_exist(const gchar *file)
{
	if (file == NULL)
		return FALSE;

	return g_file_test(file, G_FILE_TEST_EXISTS);
}

gboolean dirent_is_regular_file(struct dirent *d)
{
#if !defined(G_OS_WIN32) && !defined(MAEMO) && defined(HAVE_DIRENT_D_TYPE)
	if (d->d_type == DT_REG)
		return TRUE;
	else if (d->d_type != DT_UNKNOWN)
		return FALSE;
#endif

	return g_file_test(d->d_name, G_FILE_TEST_IS_REGULAR);
}

gint change_dir(const gchar *dir)
{
	gchar *prevdir = NULL;

	if (debug_mode)
		prevdir = g_get_current_dir();

	if (g_chdir(dir) < 0) {
		FILE_OP_ERROR(dir, "chdir");
		if (debug_mode) g_free(prevdir);
		return -1;
	} else if (debug_mode) {
		gchar *cwd;

		cwd = g_get_current_dir();
		if (strcmp(prevdir, cwd) != 0)
			g_print("current dir: %s\n", cwd);
		g_free(cwd);
		g_free(prevdir);
	}

	return 0;
}

gint make_dir(const gchar *dir)
{
	if (g_mkdir(dir, S_IRWXU) < 0) {
		FILE_OP_ERROR(dir, "mkdir");
		return -1;
	}
	if (g_chmod(dir, S_IRWXU) < 0)
		FILE_OP_ERROR(dir, "chmod");

	return 0;
}

gint make_dir_hier(const gchar *dir)
{
	gchar *parent_dir;
	const gchar *p;

	for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
		parent_dir = g_strndup(dir, p - dir);
		if (*parent_dir != '\0') {
			if (!is_dir_exist(parent_dir)) {
				if (make_dir(parent_dir) < 0) {
					g_free(parent_dir);
					return -1;
				}
			}
		}
		g_free(parent_dir);
	}

	if (!is_dir_exist(dir)) {
		if (make_dir(dir) < 0)
			return -1;
	}

	return 0;
}

gint remove_all_files(const gchar *dir)
{
	GDir *dp;
	const gchar *dir_name;
	gchar *prev_dir;

	prev_dir = g_get_current_dir();

	if (g_chdir(dir) < 0) {
		FILE_OP_ERROR(dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
		g_warning("failed to open directory: %s\n", dir);
		g_free(prev_dir);
		return -1;
	}

	while ((dir_name = g_dir_read_name(dp)) != NULL) {
		if (claws_unlink(dir_name) < 0)
			FILE_OP_ERROR(dir_name, "unlink");
	}

	g_dir_close(dp);

	if (g_chdir(prev_dir) < 0) {
		FILE_OP_ERROR(prev_dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	g_free(prev_dir);

	return 0;
}

gint remove_numbered_files(const gchar *dir, guint first, guint last)
{
	GDir *dp;
	const gchar *dir_name;
	gchar *prev_dir;
	gint file_no;

	if (first == last) {
		/* Skip all the dir reading part. */
		gchar *filename = g_strdup_printf("%s%s%u", dir, G_DIR_SEPARATOR_S, first);
		if (claws_unlink(filename) < 0) {
			FILE_OP_ERROR(filename, "unlink");
			g_free(filename);
			return -1;
		}
		g_free(filename);
		return 0;
	}

	prev_dir = g_get_current_dir();

	if (g_chdir(dir) < 0) {
		FILE_OP_ERROR(dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
		g_warning("failed to open directory: %s\n", dir);
		g_free(prev_dir);
		return -1;
	}

	while ((dir_name = g_dir_read_name(dp)) != NULL) {
		file_no = to_number(dir_name);
		if (file_no > 0 && first <= file_no && file_no <= last) {
			if (is_dir_exist(dir_name))
				continue;
			if (claws_unlink(dir_name) < 0)
				FILE_OP_ERROR(dir_name, "unlink");
		}
	}

	g_dir_close(dp);

	if (g_chdir(prev_dir) < 0) {
		FILE_OP_ERROR(prev_dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	g_free(prev_dir);

	return 0;
}

gint remove_numbered_files_not_in_list(const gchar *dir, GSList *numberlist)
{
	GDir *dp;
	const gchar *dir_name;
	gchar *prev_dir;
	gint file_no;

	prev_dir = g_get_current_dir();

	if (g_chdir(dir) < 0) {
		FILE_OP_ERROR(dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
		FILE_OP_ERROR(dir, "opendir");
		g_free(prev_dir);
		return -1;
	}

	while ((dir_name = g_dir_read_name(dp)) != NULL) {
		file_no = to_number(dir_name);
		if (file_no > 0 && (g_slist_find(numberlist, GINT_TO_POINTER(file_no)) == NULL)) {
			debug_print("removing unwanted file %d from %s\n", file_no, dir);
			if (is_dir_exist(dir_name))
				continue;
			if (claws_unlink(dir_name) < 0)
				FILE_OP_ERROR(dir_name, "unlink");
		}
	}

	g_dir_close(dp);

	if (g_chdir(prev_dir) < 0) {
		FILE_OP_ERROR(prev_dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	g_free(prev_dir);

	return 0;
}

gint remove_all_numbered_files(const gchar *dir)
{
	return remove_numbered_files(dir, 0, UINT_MAX);
}

gint remove_dir_recursive(const gchar *dir)
{
	struct stat s;
	GDir *dp;
	const gchar *dir_name;
	gchar *prev_dir;

	if (g_stat(dir, &s) < 0) {
		FILE_OP_ERROR(dir, "stat");
		if (ENOENT == errno) return 0;
		return -1;
	}

	if (!S_ISDIR(s.st_mode)) {
		if (claws_unlink(dir) < 0) {
			FILE_OP_ERROR(dir, "unlink");
			return -1;
		}

		return 0;
	}

	prev_dir = g_get_current_dir();
	/* g_print("prev_dir = %s\n", prev_dir); */

	if (!path_cmp(prev_dir, dir)) {
		g_free(prev_dir);
		if (g_chdir("..") < 0) {
			FILE_OP_ERROR(dir, "chdir");
			return -1;
		}
		prev_dir = g_get_current_dir();
	}

	if (g_chdir(dir) < 0) {
		FILE_OP_ERROR(dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
		g_warning("failed to open directory: %s\n", dir);
		g_chdir(prev_dir);
		g_free(prev_dir);
		return -1;
	}

	/* remove all files in the directory */
	while ((dir_name = g_dir_read_name(dp)) != NULL) {
		/* g_print("removing %s\n", dir_name); */

		if (is_dir_exist(dir_name)) {
			if (remove_dir_recursive(dir_name) < 0) {
				g_warning("can't remove directory\n");
				return -1;
			}
		} else {
			if (claws_unlink(dir_name) < 0)
				FILE_OP_ERROR(dir_name, "unlink");
		}
	}

	g_dir_close(dp);

	if (g_chdir(prev_dir) < 0) {
		FILE_OP_ERROR(prev_dir, "chdir");
		g_free(prev_dir);
		return -1;
	}

	g_free(prev_dir);

	if (g_rmdir(dir) < 0) {
		FILE_OP_ERROR(dir, "rmdir");
		return -1;
	}

	return 0;
}

gint rename_force(const gchar *oldpath, const gchar *newpath)
{
#ifndef G_OS_UNIX
	if (!is_file_entry_exist(oldpath)) {
		errno = ENOENT;
		return -1;
	}
	if (is_file_exist(newpath)) {
		if (claws_unlink(newpath) < 0)
			FILE_OP_ERROR(newpath, "unlink");
	}
#endif
	return g_rename(oldpath, newpath);
}

/*
 * Append src file body to the tail of dest file.
 * Now keep_backup has no effects.
 */
gint append_file(const gchar *src, const gchar *dest, gboolean keep_backup)
{
	FILE *src_fp, *dest_fp;
	gint n_read;
	gchar buf[BUFSIZ];

	gboolean err = FALSE;

	if ((src_fp = g_fopen(src, "rb")) == NULL) {
		FILE_OP_ERROR(src, "g_fopen");
		return -1;
	}

	if ((dest_fp = g_fopen(dest, "ab")) == NULL) {
		FILE_OP_ERROR(dest, "g_fopen");
		fclose(src_fp);
		return -1;
	}

	if (change_file_mode_rw(dest_fp, dest) < 0) {
		FILE_OP_ERROR(dest, "chmod");
		g_warning("can't change file mode\n");
	}

	while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), src_fp)) > 0) {
		if (n_read < sizeof(buf) && ferror(src_fp))
			break;
		if (fwrite(b…