97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/* ****************************************************************************
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* fs/builtin/posix/topath.c -- POSIX path conversions.
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* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libcasio.
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* libcasio is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libcasio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libcasio; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************* */
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#include "posix.h"
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#ifndef LIBCASIO_DISABLED_POSIX_FS
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/**
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* casio_make_posix_path:
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* Make a POSIX path from a platform-agnostic path.
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*
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* @arg cookie the filesystem cookie (unused).
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* @arg ppath the path to make.
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* @arg array the path array.
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* @return the error code (0 if ok).
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*/
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int CASIO_EXPORT casio_make_posix_path(void *cookie,
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void **ppath, casio_path_t *array)
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{
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size_t length; const casio_pathnode_t *node;
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char *path;
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(void)cookie;
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/* Make up the length and validate. */
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length = !(array->casio_path_flags & casio_pathflag_rel);
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node = array->casio_path_nodes;
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while (node) {
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size_t nodesize = node->casio_pathnode_size;
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/* Check that there is no forbidden characters. */
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if (nodesize > 255
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|| memchr(node->casio_pathnode_name, 0, nodesize)
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|| memchr(node->casio_pathnode_name, '/', nodesize))
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return (casio_error_invalid);
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/* Iterate on the node, add to the length. */
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length += nodesize;
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node = node->casio_pathnode_next;
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if (node) length++; /* '/' */
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}
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/* Allocate the path. */
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*ppath = casio_alloc(length + 1, 1);
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path = (char*)*ppath;
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if (!path) return (casio_error_alloc);
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/* Fill the path. */
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if (~array->casio_path_flags & casio_pathflag_rel)
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*path++ = '/';
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node = array->casio_path_nodes;
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while (node) {
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size_t nodesize = node->casio_pathnode_size;
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/* Copy the node data. */
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memcpy(path, node->casio_pathnode_name, nodesize);
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path += nodesize;
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/* Iterate on the node, copy a slash if needed. */
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node = node->casio_pathnode_next;
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if (node) *path++ = '/';
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}
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*path = 0;
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/* No error has occured! */
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return (0);
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}
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/**
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* casio_free_posix_path:
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* Free a POSIX path.
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*
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* @arg cookie the cookie.
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* @arg nat the native path.
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*/
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void CASIO_EXPORT casio_free_posix_path(void *cookie, void *nat)
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{
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casio_free(nat);
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}
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#endif
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