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/** \file paths.c
* Path and file name handling functions.
*/
/* XTrkCad - Model Railroad CAD
* Copyright (C) 2017 Martin Fischer
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stdarg.h>
#ifdef WINDOWS
#include <windows.h>
#endif
#include <wlib.h>
#include <dynstring.h>
#include "track.h"
#include "common.h"
#include "utility.h"
#include "misc.h"
#include "i18n.h"
#include "uthash.h"
#include "paths.h"
struct pathTable {
char type[ PATH_TYPE_SIZE]; /**< type of path */
DynString path; /**< path */
UT_hash_handle hh; /**< makes this structure hashable */
};
static struct pathTable *paths;
static void AddPath(const char *type, char*path);
static struct pathTable *FindPath(const char *type);
#define PATHS_SECTION "paths"
/**
* Find the path for a given type in the hash table
*
* \param type IN the searched type
* \param entry OUT the table entry
* \return
*/
static struct pathTable *
FindPath(const char *type)
{
struct pathTable *entry;
HASH_FIND_STR(paths, type, entry);
return (entry);
}
/**
* Add a path to the table. If it already exists, the value ist updated.
*
* \param type IN type of path
* \param path IN path
*/
static void
AddPath(const char *type, char*path)
{
struct pathTable *tableEntry;
tableEntry = FindPath(type);
if (tableEntry) {
DynStringClear(&(tableEntry->path));
} else {
tableEntry = malloc(sizeof(struct pathTable));
DynStringMalloc(&tableEntry->path, 16);
strcpy(tableEntry->type, type);
HASH_ADD_STR(paths, type, tableEntry);
}
DynStringCatCStr(&(tableEntry->path), path);
}
/**
* Update the current directory for a specific filetype. Get the directory part from the current file.
* XTrackCAD keeps seprate directories for different filetypes.(for trackplans, bitmaps and DXF files).
* The paths are stored in a hash table using the file type as the hash.
*
* \param pathType IN file type
* \param fileName IN fully qualified filename
* \return
*
*/
void SetCurrentPath(
const char * pathType,
const char * fileName)
{
char *path;
char *copy;
assert(fileName != NULL);
assert(pathType != NULL);
copy = strdup(fileName);
path = strrchr(copy, FILE_SEP_CHAR[0]);
if (path) {
*path = '\0';
AddPath(pathType, copy);
wPrefSetString(PATHS_SECTION, pathType, copy);
}
free(copy);
}
/**
* Get the current path for a given file type. Following options are searched:
* 1. the hash array
* 2. the preferences file for this type
* 3. the older general setting (for backwards compatibility)
* 4. the user's home directory as default
* Search is finished when one of the options returns a valid path
*
* \param IN pathType the type
* \return pointer to path of NULL if not existing
*/
char *GetCurrentPath(
const char *pathType)
{
struct pathTable *currentPath;
const char *path;
assert(pathType != NULL);
currentPath = FindPath(pathType);
if (currentPath) {
return (DynStringToCStr(&(currentPath->path)));
}
path = wPrefGetString(PATHS_SECTION, pathType);
if (!path) {
path = wPrefGetString("file", "directory");
}
if (!path) {
path = wGetUserHomeDir();
}
AddPath(pathType, (char *)path);
return ((char *)path);
}
/**
* Find the filename/extension piece in a fully qualified path
*
* \param path IN the full path
* \return pointer to the filename part
*/
char *FindFilename(char *path)
{
char *name;
name = strrchr(path, FILE_SEP_CHAR[0]);
if (name) {
name++;
} else {
name = path;
}
return (name);
}
/**
* Make a full path definition from directorys and filenames. The individual pieces are
* concatinated. Where necessary a path delimiter is added. A pointer to the resulting
* string is returned. This memory should be free'd when no longer needed.
* Windows: to construct an absolute path, a leading backslash has to be included after
* the drive delimiter ':' or at the beginning of the first directory name.
*
* \param str OUT pointer to the complete path
* \param ... IN one or more parts of the path, terminate with NULL
*/
void
MakeFullpath(char **str, ...)
{
va_list valist;
const char *part;
char *separator = FILE_SEP_CHAR;
char lastchar = '\0';
DynString path;
DynStringMalloc(&path, 0);
va_start(valist, str);
while ((part = va_arg(valist, const char *))) {
if (part[0] !=separator[0] && lastchar && lastchar != separator[0] &&
lastchar != ':') {
DynStringNCatCStr(&path, 1, separator);
}
DynStringCatCStr(&path, part);
lastchar = part[strlen(part) - 1];
}
*str = strdup(DynStringToCStr(&path));
DynStringFree(&path);
va_end(valist);
}
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