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/*
* Copyright 2014 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
* Table operations for files with posix compliant path separator.
*/
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include "desktop/gui_factory.h"
#include "utils/utils.h"
#include "utils/corestrings.h"
#include "utils/url.h"
#include "utils/nsurl.h"
#include "utils/file.h"
/**
* Generate a posix 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] nemb The number of elements.
* @param[in] ... 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 posix_vmkpath(char **str, size_t *size, size_t nelm, va_list ap)
{
return vsnstrjoin(str, size, '/', nelm, ap);
}
/**
* Get the basename of a file using posix 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 posix_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 posix file handling.
*
* @parm[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 posix_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;
}
*path_out = path;
return NSERROR_OK;
}
/**
* Create a nsurl from a path using posix 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 posix_path_to_nsurl(const char *path, struct nsurl **url_out)
{
nserror ret;
int urllen;
char *urlstr;
char *escpath; /* escaped version of the path */
char *escpaths;
if ((path == NULL) || (url_out == NULL) || (*path == 0)) {
return NSERROR_BAD_PARAMETER;
}
/* escape the path so it can be placed in a url */
ret = url_escape(path, 0, false, "/", &escpath);
if (ret != NSERROR_OK) {
return ret;
}
/* remove unecessary / as file: paths are already absolute */
escpaths = escpath;
while (*escpaths == '/') {
escpaths++;
}
/* build url as a string for nsurl constructor */
urllen = strlen(escpaths) + FILE_SCHEME_PREFIX_LEN + 1;
urlstr = malloc(urllen);
if (urlstr == NULL) {
free(escpath);
return NSERROR_NOMEM;
}
snprintf(urlstr, urllen, "%s%s", FILE_SCHEME_PREFIX, escpaths);
free(escpath);
ret = nsurl_create(urlstr, url_out);
free(urlstr);
return ret;
}
/**
* default to using the posix file handling
*/
static struct gui_file_table file_table = {
.mkpath = posix_vmkpath,
.basename = posix_basename,
.nsurl_to_path = posix_nsurl_to_path,
.path_to_nsurl = posix_path_to_nsurl,
};
struct gui_file_table *default_file_table = &file_table;
/* exported interface documented in utils/file.h */
nserror netsurf_mkpath(char **str, size_t *size, size_t nelm, ...)
{
va_list ap;
nserror ret;
va_start(ap, nelm);
ret = guit->file->mkpath(str, size, nelm, ap);
va_end(ap);
return ret;
}
/* exported interface documented in utils/file.h */
nserror netsurf_nsurl_to_path(struct nsurl *url, char **path_out)
{
return guit->file->nsurl_to_path(url, path_out);
}
/* exported interface documented in utils/file.h */
nserror netsurf_path_to_nsurl(const char *path, struct nsurl **url)
{
return guit->file->path_to_nsurl(path, url);
}
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