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+/*
+ * Copyright 2014, 2015 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * Windows file operation table implementation.
+ */
+
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <windows.h>
+
+#include "utils/errors.h"
+#include "utils/nsurl.h"
+#include "utils/log.h"
+#include "utils/utils.h"
+#include "utils/corestrings.h"
+#include "utils/url.h"
+#include "utils/file.h"
+#include "desktop/browser.h"
+
+#include "windows/file.h"
+
+/**
+ * Generate a windows path from one or more component elemnts.
+ *
+ * If a string is allocated it must be freed by the caller.
+ *
+ * @param[in,out] str pointer to string pointer if this is NULL enough
+ * storage will be allocated for the complete path.
+ * @param[in,out] size The size of the space available if \a str not
+ * NULL on input and if not NULL set to the total
+ * output length on output.
+ * @param[in] nelm The number of elements.
+ * @param[in] ap The elements of the path as string pointers.
+ * @return NSERROR_OK and the complete path is written to str
+ * or error code on faliure.
+ */
+static nserror windows_mkpath(char **str, size_t *size, size_t nelm, va_list ap)
+{
+ return vsnstrjoin(str, size, '\\', nelm, ap);
+}
+
+
+/**
+ * Get the basename of a file using windows path handling.
+ *
+ * This gets the last element of a path and returns it.
+ *
+ * @param[in] path The path to extract the name from.
+ * @param[in,out] str Pointer to string pointer if this is NULL enough
+ * storage will be allocated for the path element.
+ * @param[in,out] size The size of the space available if \a
+ * str not NULL on input and set to the total
+ * output length on output.
+ * @return NSERROR_OK and the complete path is written to str
+ * or error code on faliure.
+ */
+static nserror windows_basename(const char *path, char **str, size_t *size)
+{
+ const char *leafname;
+ char *fname;
+
+ if (path == NULL) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ leafname = strrchr(path, '\\');
+ if (!leafname) {
+ leafname = path;
+ } else {
+ leafname += 1;
+ }
+
+ fname = strdup(leafname);
+ if (fname == NULL) {
+ return NSERROR_NOMEM;
+ }
+
+ *str = fname;
+ if (size != NULL) {
+ *size = strlen(fname);
+ }
+ return NSERROR_OK;
+}
+
+
+/**
+ * Create a path from a nsurl using windows file handling.
+ *
+ * @param[in] url The url to encode.
+ * @param[out] path_out A string containing the result path which should
+ * be freed by the caller.
+ * @return NSERROR_OK and the path is written to \a path or error code
+ * on faliure.
+ */
+static nserror windows_nsurl_to_path(struct nsurl *url, char **path_out)
+{
+ lwc_string *urlpath;
+ char *path;
+ bool match;
+ lwc_string *scheme;
+ nserror res;
+
+ if ((url == NULL) || (path_out == NULL)) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ scheme = nsurl_get_component(url, NSURL_SCHEME);
+
+ if (lwc_string_caseless_isequal(scheme, corestring_lwc_file,
+ &match) != lwc_error_ok)
+ {
+ return NSERROR_BAD_PARAMETER;
+ }
+ lwc_string_unref(scheme);
+ if (match == false) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ urlpath = nsurl_get_component(url, NSURL_PATH);
+ if (urlpath == NULL) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ res = url_unescape(lwc_string_data(urlpath), &path);
+ lwc_string_unref(urlpath);
+ if (res != NSERROR_OK) {
+ return res;
+ }
+
+ /* if there is a drive: prefix treat path as DOS filename */
+ if ((path[2] == ':') || (path[2] == '|')) {
+ char *sidx; /* slash index */
+
+ /* move the string down to remove leading / note the
+ * strlen is *not* copying too much data as we are
+ * moving the null too!
+ */
+ memmove(path, path + 1, strlen(path));
+
+ /* swap / for \ */
+ sidx = strrchr(path, '/');
+ while (sidx != NULL) {
+ *sidx = '\\';
+ sidx = strrchr(path, '/');
+ }
+ }
+ /* if the path does not have a drive letter we return the
+ * complete path.
+ */
+ /** @todo Need to check returning the unaltered path in this
+ * case is correct
+ */
+
+ *path_out = path;
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * Create a nsurl from a path using windows file handling.
+ *
+ * Perform the necessary operations on a path to generate a nsurl.
+ *
+ * @param[in] path The path to convert.
+ * @param[out] url_out pointer to recive the nsurl, The returned url
+ * should be unreferenced by the caller.
+ * @return NSERROR_OK and the url is placed in \a url or error code on
+ * faliure.
+ */
+static nserror windows_path_to_nsurl(const char *path, struct nsurl **url_out)
+{
+ nserror ret;
+ int urllen;
+ char *urlstr;
+ char *sidx; /* slash index */
+
+ if ((path == NULL) || (url_out == NULL) || (*path == 0)) {
+ return NSERROR_BAD_PARAMETER;
+ }
+
+ /* build url as a string for nsurl constructor */
+ urllen = strlen(path) + FILE_SCHEME_PREFIX_LEN + 5;
+ urlstr = malloc(urllen);
+ if (urlstr == NULL) {
+ return NSERROR_NOMEM;
+ }
+
+ /** @todo check if this should be url escaping the path. */
+ if (*path == '/') {
+ /* unix style path start, so try wine Z: */
+ snprintf(urlstr, urllen, "%sZ%%3A%s", FILE_SCHEME_PREFIX, path);
+ } else {
+ snprintf(urlstr, urllen, "%s%s", FILE_SCHEME_PREFIX, path);
+ }
+
+ sidx = strrchr(urlstr, '\\');
+ while (sidx != NULL) {
+ *sidx = '/';
+ sidx = strrchr(urlstr, '\\');
+ }
+
+ ret = nsurl_create(urlstr, url_out);
+ free(urlstr);
+
+ return ret;
+}
+
+
+/**
+ * Ensure that all directory elements needed to store a filename exist.
+ *
+ * @param fname The filename to ensure the path to exists.
+ * @return NSERROR_OK on success or error code on failure.
+ */
+static nserror windows_mkdir_all(const char *fname)
+{
+ char *dname;
+ char *sep;
+ struct stat sb;
+
+ dname = strdup(fname);
+
+ sep = strrchr(dname, '\\');
+ if (sep == NULL) {
+ /* no directory separator path is just filename so its ok */
+ free(dname);
+ return NSERROR_OK;
+ }
+
+ *sep = 0; /* null terminate directory path */
+
+ if (stat(dname, &sb) == 0) {
+ free(dname);
+ if (S_ISDIR(sb.st_mode)) {
+ /* path to file exists and is a directory */
+ return NSERROR_OK;
+ }
+ return NSERROR_NOT_DIRECTORY;
+ }
+ *sep = '\\'; /* restore separator */
+
+ sep = dname;
+ while (*sep == '\\') {
+ sep++;
+ }
+ while ((sep = strchr(sep, '\\')) != NULL) {
+ *sep = 0;
+ if (stat(dname, &sb) != 0) {
+ if (nsmkdir(dname, S_IRWXU) != 0) {
+ /* could not create path element */
+ free(dname);
+ return NSERROR_NOT_FOUND;
+ }
+ } else {
+ if (! S_ISDIR(sb.st_mode)) {
+ /* path element not a directory */
+ free(dname);
+ return NSERROR_NOT_DIRECTORY;
+ }
+ }
+ *sep = '\\'; /* restore separator */
+ /* skip directory separators */
+ while (*sep == '\\') {
+ sep++;
+ }
+ }
+
+ free(dname);
+ return NSERROR_OK;
+}
+
+/* windows file handling */
+static struct gui_file_table file_table = {
+ .mkpath = windows_mkpath,
+ .basename = windows_basename,
+ .nsurl_to_path = windows_nsurl_to_path,
+ .path_to_nsurl = windows_path_to_nsurl,
+ .mkdir_all = windows_mkdir_all,
+};
+
+struct gui_file_table *win32_file_table = &file_table;