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137 lines
3.2 KiB
137 lines
3.2 KiB
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "private-lib-core.h"
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void
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lws_set_fops(struct lws_context *context, const struct lws_plat_file_ops *fops)
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{
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context->fops = fops;
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}
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lws_filepos_t
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lws_vfs_tell(lws_fop_fd_t fop_fd)
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{
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return fop_fd->pos;
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}
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lws_filepos_t
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lws_vfs_get_length(lws_fop_fd_t fop_fd)
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{
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return fop_fd->len;
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}
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uint32_t
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lws_vfs_get_mod_time(lws_fop_fd_t fop_fd)
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{
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return fop_fd->mod_time;
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}
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lws_fileofs_t
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lws_vfs_file_seek_set(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
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{
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lws_fileofs_t ofs;
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ofs = fop_fd->fops->LWS_FOP_SEEK_CUR(fop_fd, offset - fop_fd->pos);
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return ofs;
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}
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lws_fileofs_t
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lws_vfs_file_seek_end(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
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{
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return fop_fd->fops->LWS_FOP_SEEK_CUR(fop_fd, fop_fd->len +
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fop_fd->pos + offset);
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}
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const struct lws_plat_file_ops *
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lws_vfs_select_fops(const struct lws_plat_file_ops *fops, const char *vfs_path,
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const char **vpath)
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{
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const struct lws_plat_file_ops *pf;
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const char *p = vfs_path;
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int n;
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*vpath = NULL;
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/* no non-platform fops, just use that */
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if (!fops->next)
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return fops;
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/*
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* scan the vfs path looking for indications we are to be
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* handled by a specific fops
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*/
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while (p && *p) {
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if (*p != '/') {
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p++;
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continue;
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}
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/* the first one is always platform fops, so skip */
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pf = fops->next;
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while (pf) {
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n = 0;
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while (n < (int)LWS_ARRAY_SIZE(pf->fi) && pf->fi[n].sig) {
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if (p >= vfs_path + pf->fi[n].len)
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if (!strncmp(p - (pf->fi[n].len - 1),
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pf->fi[n].sig,
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pf->fi[n].len - 1)) {
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*vpath = p + 1;
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return pf;
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}
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n++;
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}
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pf = pf->next;
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}
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p++;
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}
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return fops;
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}
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lws_fop_fd_t LWS_WARN_UNUSED_RESULT
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lws_vfs_file_open(const struct lws_plat_file_ops *fops, const char *vfs_path,
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lws_fop_flags_t *flags)
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{
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const char *vpath = "";
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const struct lws_plat_file_ops *selected;
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selected = lws_vfs_select_fops(fops, vfs_path, &vpath);
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return selected->LWS_FOP_OPEN(fops, vfs_path, vpath, flags);
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}
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struct lws_plat_file_ops *
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lws_get_fops(struct lws_context *context)
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{
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return (struct lws_plat_file_ops *)context->fops;
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}
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