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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
*
* 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 "private-lib-core.h"
void
lws_set_fops(struct lws_context *context, const struct lws_plat_file_ops *fops)
{
context->fops = fops;
}
lws_filepos_t
lws_vfs_tell(lws_fop_fd_t fop_fd)
{
return fop_fd->pos;
}
lws_filepos_t
lws_vfs_get_length(lws_fop_fd_t fop_fd)
{
return fop_fd->len;
}
uint32_t
lws_vfs_get_mod_time(lws_fop_fd_t fop_fd)
{
return fop_fd->mod_time;
}
lws_fileofs_t
lws_vfs_file_seek_set(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
{
lws_fileofs_t ofs;
ofs = fop_fd->fops->LWS_FOP_SEEK_CUR(fop_fd,
offset - (lws_fileofs_t)fop_fd->pos);
return ofs;
}
lws_fileofs_t
lws_vfs_file_seek_end(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
{
return fop_fd->fops->LWS_FOP_SEEK_CUR(fop_fd,
(lws_fileofs_t)fop_fd->len + (lws_fileofs_t)fop_fd->pos + offset);
}
const struct lws_plat_file_ops *
lws_vfs_select_fops(const struct lws_plat_file_ops *fops, const char *vfs_path,
const char **vpath)
{
const struct lws_plat_file_ops *pf;
const char *p = vfs_path;
int n;
*vpath = NULL;
/* no non-platform fops, just use that */
if (!fops->next)
return fops;
/*
* scan the vfs path looking for indications we are to be
* handled by a specific fops
*/
while (p && *p) {
if (*p != '/') {
p++;
continue;
}
/* the first one is always platform fops, so skip */
pf = fops->next;
while (pf) {
n = 0;
while (n < (int)LWS_ARRAY_SIZE(pf->fi) && pf->fi[n].sig) {
if (p >= vfs_path + pf->fi[n].len)
if (!strncmp(p - (pf->fi[n].len - 1),
pf->fi[n].sig,
(unsigned int)(pf->fi[n].len - 1))) {
*vpath = p + 1;
return pf;
}
n++;
}
pf = pf->next;
}
p++;
}
return fops;
}
lws_fop_fd_t LWS_WARN_UNUSED_RESULT
lws_vfs_file_open(const struct lws_plat_file_ops *fops, const char *vfs_path,
lws_fop_flags_t *flags)
{
const char *vpath = "";
const struct lws_plat_file_ops *selected;
selected = lws_vfs_select_fops(fops, vfs_path, &vpath);
return selected->LWS_FOP_OPEN(fops, vfs_path, vpath, flags);
}
struct lws_plat_file_ops *
lws_get_fops(struct lws_context *context)
{
return (struct lws_plat_file_ops *)context->fops;
}
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