mirror of
https://github.com/warmcat/libwebsockets.git
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134 lines
3 KiB
C
134 lines
3 KiB
C
/*
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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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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library 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. See the GNU
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* 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
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include "core/private.h"
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LWS_VISIBLE LWS_EXTERN 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_VISIBLE LWS_EXTERN 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_VISIBLE LWS_EXTERN 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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LWS_VISIBLE LWS_EXTERN 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_VISIBLE 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_VISIBLE 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_VISIBLE LWS_EXTERN 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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LWS_VISIBLE 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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