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/* Tux Commandern VFS: String utilities
* Copyright (C) 2007 Tomas Bzatek <tbzatek@users.sourceforge.net>
* Check for updates on tuxcmd.sourceforge.net
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "strutils.h"
char* include_trailing_path_sep(const char *APath)
{
if (APath == NULL) return NULL;
char *ANewPath;
// log("xxx = %s\n", (APath + strlen(APath) - 1));
if (strcmp(APath + strlen(APath) - 1, "/") != 0) {
ANewPath = (char*)malloc(strlen(APath) + 2);
snprintf(ANewPath, strlen(APath) + 2, "%s/", APath);
} else ANewPath = strdup(APath);
return ANewPath;
}
char* exclude_trailing_path_sep(const char *APath)
{
if (APath == NULL) return NULL;
char *ANewPath;
// log("orig = %s, len = %d, xxx = %s\n", APath, (int)strlen(APath), (APath + strlen(APath) - 1));
if ((strcmp(APath + strlen(APath) - 1, "/") == 0) && (strlen(APath) > 1)) {
ANewPath = (char*)malloc(strlen(APath));
snprintf(ANewPath, strlen(APath), "%s", APath); // The number of bytes copied includes the trailing \0
} else ANewPath = strdup(APath);
return ANewPath;
}
char* include_leading_path_sep(const char *APath)
{
if (APath == NULL) return NULL;
char *ANewPath;
// log("xxx = %s, %lu, strlen(APath) = %d, index() = %ld\n", APath, (unsigned long int)APath, (int)strlen(APath), (unsigned long int)index(APath, 0x2f));
if (index(APath, 0x2f) != APath) {
ANewPath = (char*)malloc(strlen(APath) + 2);
snprintf(ANewPath, strlen(APath) + 2, "/%s", APath); // The number of bytes copied includes the trailing \0
} else ANewPath = strdup(APath);
return ANewPath;
}
char* exclude_leading_path_sep(const char* APath)
{
if (APath == NULL) return NULL;
char *s = strdup(APath);
char *ss;
if (IS_DIR_SEP(*s)) ss = strdup(s + 1); else ss = strdup(s);
free(s);
return ss;
}
char* extract_file_name(const char *APath)
{
if (APath == NULL) return NULL;
// log("xxx = %s\n", (APath + strlen(APath) - 1));
char *file_part = rindex(APath, 0x2f); // returns NULL if not found or if the file is in the root ( / )
if (file_part == NULL) return NULL;
return strdup(file_part + 1);
}
// Extracts file path starting with "/" and ending with "/"
char* extract_file_path(const char *APath)
{
if (APath == NULL) return NULL;
// log("xxx = %s\n", (APath + strlen(APath) - 1));
char *file_part = rindex(APath, 0x2f); // returns NULL if not found or if the file is in the root ( / )
if (file_part == NULL) return NULL;
char *ANewPath = (char*)malloc(file_part - APath + 2);
snprintf(ANewPath, file_part - APath + 2, "%s", APath);
return ANewPath;
}
// canonicalize_filename() is stolen from glib-2.16
// Copyright (C) 2006-2007 Alexander Larsson <alexl@redhat.com>
char *
canonicalize_filename (const char *filename)
{
char *canon, *start, *p, *q;
int i;
canon = g_strdup (filename);
start = (char *)g_path_skip_root (canon);
if (start == NULL) start = canon;
/* POSIX allows double slashes at the start to
* mean something special (as does windows too).
* So, "//" != "/", but more than two slashes
* is treated as "/".
*/
i = 0;
for (p = start - 1;
(p >= canon) &&
G_IS_DIR_SEPARATOR (*p);
p--)
i++;
if (i > 2)
{
i -= 1;
start -= i;
memmove (start, start+i, strlen (start+i)+1);
}
p = start;
while (*p != 0)
{
if (p[0] == '.' && (p[1] == 0 || G_IS_DIR_SEPARATOR (p[1])))
{
memmove (p, p+1, strlen (p+1)+1);
}
else if (p[0] == '.' && p[1] == '.' && (p[2] == 0 || G_IS_DIR_SEPARATOR (p[2])))
{
q = p + 2;
/* Skip previous separator */
p = p - 2;
if (p < start)
p = start;
while (p > start && !G_IS_DIR_SEPARATOR (*p))
p--;
if (G_IS_DIR_SEPARATOR (*p))
*p++ = G_DIR_SEPARATOR;
memmove (p, q, strlen (q)+1);
}
else
{
/* Skip until next separator */
while (*p != 0 && !G_IS_DIR_SEPARATOR (*p))
p++;
if (*p != 0)
{
/* Canonicalize one separator */
*p++ = G_DIR_SEPARATOR;
}
}
/* Remove additional separators */
q = p;
while (*q && G_IS_DIR_SEPARATOR (*q))
q++;
if (p != q)
memmove (p, q, strlen (q)+1);
}
/* Remove trailing slashes */
if (p > start && G_IS_DIR_SEPARATOR (*(p-1)))
*(p-1) = 0;
return canon;
}
char* resolve_relative(const char *source, const char *point_to)
{
if (source == NULL) return NULL;
if (point_to == NULL) return strdup(source);
if (g_path_is_absolute(point_to)) return strdup(point_to);
char *rel = g_build_filename(source, point_to, NULL);
log("resolve_relative: rel = '%s'\n", rel);
char *canon = canonicalize_filename(rel);
log("resolve_relative: canon = '%s'\n", canon);
free(rel);
return canon;
}
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