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 parse-bytecode

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realpath.c

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/*

* This file is part of the Micro Python project, http://micropython.org/

*

* The MIT License (MIT)

*

* Copyright (c) 2013, 2014 Damien P. George

*

* 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.

*/

#include <stdlib.h>

#include <errno.h>

#include <unistd.h>

// Make sure a path only has forward slashes.

char *to_unix_path(char *p) {

if (p != NULL) {

char *pp = p;

while (*pp != 0) {

if (*pp == '\\')

*pp = '/';

++pp;

}

}

return p;

}

// Implement realpath() using _fullpath and make it use the same error codes as realpath() on unix.

// Also have it return a path with forward slashes only as some code relies on this,

// but _fullpath() returns backward slashes no matter what.

char *realpath(const char *path, char *resolved_path) {

char *ret = NULL;

if (path == NULL) {

errno = EINVAL;

} else if (access(path, R_OK) == 0) {

ret = resolved_path;

if (ret == NULL)

ret = malloc(_MAX_PATH);

if (ret == NULL) {

errno = ENOMEM;

} else {

ret = _fullpath(ret, path, _MAX_PATH);

if (ret == NULL)

errno = EIO;

}

}

return to_unix_path(ret);

}