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/* Copyright (C) 2010 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* helper functions for path strings.
*/
#include "precompiled.h"
#include "lib/path.h"
#include <cstring>
#include <cerrno>
static const StatusDefinition pathStatusDefinitions[] = {
{ ERR::PATH_CHARACTER_ILLEGAL, L"illegal path character" },
{ ERR::PATH_CHARACTER_UNSAFE, L"unsafe path character" },
{ ERR::PATH_NOT_FOUND, L"path not found" },
{ ERR::PATH_MIXED_SEPARATORS, L"path contains both slash and backslash separators" }
};
STATUS_ADD_DEFINITIONS(pathStatusDefinitions);
static bool path_is_dir_sep(wchar_t c)
{
if(c == '/' || c == '\\')
return true;
return false;
}
// is s2 a subpath of s1, or vice versa?
// (equal counts as subpath)
bool path_is_subpath(const wchar_t* s1, const wchar_t* s2)
{
// make sure s1 is the shorter string
if(wcslen(s1) > wcslen(s2))
std::swap(s1, s2);
wchar_t c1 = 0, last_c1, c2;
for(;;)
{
last_c1 = c1;
c1 = *s1++, c2 = *s2++;
// end of s1 reached:
if(c1 == '\0')
{
// s1 matched s2 up until:
if((c2 == '\0') || // its end (i.e. they're equal length) OR
path_is_dir_sep(c2) || // start of next component OR
path_is_dir_sep(last_c1)) // ", but both have a trailing slash
// => is subpath
return true;
}
// mismatch => is not subpath
if(c1 != c2)
return false;
}
}
//-----------------------------------------------------------------------------
// return pointer to the name component within path (i.e. skips over all
// characters up to the last dir separator, if any).
const wchar_t* path_name_only(const wchar_t* path)
{
const wchar_t* slash1 = wcsrchr(path, '/');
const wchar_t* slash2 = wcsrchr(path, '\\');
// neither present, it's a filename only
if(!slash1 && !slash2)
return path;
// return name, i.e. component after the last slash
const wchar_t* name = std::max(slash1, slash2)+1;
return name;
}
/*static*/ Status Path::Validate(String::value_type c)
{
if(c < 32)
return ERR::PATH_CHARACTER_UNSAFE;
#if !OS_WIN
if(c >= UCHAR_MAX)
return ERR::PATH_CHARACTER_UNSAFE;
#endif
switch(c)
{
case '\\':
case '/':
case ':':
case '"':
case '?':
case '*':
case '<':
case '>':
case '|':
case '^':
return ERR::PATH_CHARACTER_ILLEGAL;
default:
return INFO::OK;
}
}
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