usbloadergx/source/filebrowser.cpp

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/****************************************************************************
* libwiigui Template
* Tantric 2009
*
* modified by dimok
*
* filebrowser.cpp
*
* Generic file routines - reading, writing, browsing
***************************************************************************/
#include <gccore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wiiuse/wpad.h>
#include <sys/dir.h>
#include <malloc.h>
#include "filebrowser.h"
#include "menu.h"
BROWSERINFO browser;
BROWSERENTRY * browserList = NULL; // list of files/folders in browser
/****************************************************************************
* ResetBrowser()
* Clears the file browser memory, and allocates one initial entry
***************************************************************************/
void ResetBrowser()
{
browser.numEntries = 0;
browser.selIndex = 0;
browser.pageIndex = 0;
// Clear any existing values
if(browserList != NULL)
{
free(browserList);
browserList = NULL;
}
// set aside space for 1 entry
browserList = (BROWSERENTRY *)malloc(sizeof(BROWSERENTRY));
memset(browserList, 0, sizeof(BROWSERENTRY));
}
/****************************************************************************
* UpdateDirName()
* Update curent directory name for file browser
***************************************************************************/
int UpdateDirName()
{
int size=0;
char * test;
char temp[1024];
/* current directory doesn't change */
if (strcmp(browserList[browser.selIndex].filename,".") == 0)
{
return 0;
}
/* go up to parent directory */
else if (strcmp(browserList[browser.selIndex].filename,"..") == 0)
{
/* determine last subdirectory namelength */
sprintf(temp,"%s",browser.dir);
test = strtok(temp,"/");
while (test != NULL)
{
size = strlen(test);
test = strtok(NULL,"/");
}
/* remove last subdirectory name */
size = strlen(browser.dir) - size - 1;
browser.dir[size] = 0;
return 1;
}
/* Open a directory */
else
{
/* test new directory namelength */
if ((strlen(browser.dir)+1+strlen(browserList[browser.selIndex].filename)) < MAXPATHLEN)
{
/* update current directory name */
sprintf(browser.dir, "%s/%s",browser.dir, browserList[browser.selIndex].filename);
return 1;
}
else
{
return -1;
}
}
}
/****************************************************************************
* FileSortCallback
*
* Quick sort callback to sort file entries with the following order:
* .
* ..
* <dirs>
* <files>
***************************************************************************/
int FileSortCallback(const void *f1, const void *f2)
{
/* Special case for implicit directories */
if(((BROWSERENTRY *)f1)->filename[0] == '.' || ((BROWSERENTRY *)f2)->filename[0] == '.')
{
if(strcmp(((BROWSERENTRY *)f1)->filename, ".") == 0) { return -1; }
if(strcmp(((BROWSERENTRY *)f2)->filename, ".") == 0) { return 1; }
if(strcmp(((BROWSERENTRY *)f1)->filename, "..") == 0) { return -1; }
if(strcmp(((BROWSERENTRY *)f2)->filename, "..") == 0) { return 1; }
}
/* If one is a file and one is a directory the directory is first. */
if(((BROWSERENTRY *)f1)->isdir && !(((BROWSERENTRY *)f2)->isdir)) return -1;
if(!(((BROWSERENTRY *)f1)->isdir) && ((BROWSERENTRY *)f2)->isdir) return 1;
return stricmp(((BROWSERENTRY *)f1)->filename, ((BROWSERENTRY *)f2)->filename);
}
/***************************************************************************
* Browse subdirectories
**************************************************************************/
int
ParseDirectory()
{
DIR_ITER *dir = NULL;
char fulldir[MAXPATHLEN];
char filename[MAXPATHLEN];
struct stat filestat;
// reset browser
ResetBrowser();
// open the directory
sprintf(fulldir, "%s%s", browser.rootdir, browser.dir); // add currentDevice to path
dir = diropen(fulldir);
// if we can't open the dir, try opening the root dir
if (dir == NULL)
{
sprintf(browser.dir,"/");
dir = diropen(browser.rootdir);
if (dir == NULL)
{
return -1;
}
}
// index files/folders
int entryNum = 0;
while(dirnext(dir,filename,&filestat) == 0)
{
if(strcmp(filename,".") != 0)
{
BROWSERENTRY * newBrowserList = (BROWSERENTRY *)realloc(browserList, (entryNum+1) * sizeof(BROWSERENTRY));
if(!newBrowserList) // failed to allocate required memory
{
ResetBrowser();
entryNum = -1;
break;
}
else
{
browserList = newBrowserList;
}
memset(&(browserList[entryNum]), 0, sizeof(BROWSERENTRY)); // clear the new entry
strncpy(browserList[entryNum].filename, filename, MAXJOLIET);
if(strcmp(filename,"..") == 0)
{
sprintf(browserList[entryNum].displayname, "..");
}
else
{
strcpy(browserList[entryNum].displayname, filename); // crop name for display
}
browserList[entryNum].length = filestat.st_size;
browserList[entryNum].isdir = (filestat.st_mode & _IFDIR) == 0 ? 0 : 1; // flag this as a dir
entryNum++;
}
}
// close directory
dirclose(dir);
// Sort the file list
qsort(browserList, entryNum, sizeof(BROWSERENTRY), FileSortCallback);
browser.numEntries = entryNum;
return entryNum;
}
/****************************************************************************
* BrowserChangeFolder
*
* Update current directory and set new entry list if directory has changed
***************************************************************************/
int BrowserChangeFolder()
{
if(!UpdateDirName())
return -1;
ParseDirectory();
return browser.numEntries;
}
/****************************************************************************
* BrowseDevice
* Displays a list of files on the selected device
***************************************************************************/
int BrowseDevice(int device)
{
sprintf(browser.dir, "/");
switch(device)
{
case SD:
sprintf(browser.rootdir, "SD:");
break;
case USB:
sprintf(browser.rootdir, "USB:");
break;
}
ParseDirectory(); // Parse root directory
return browser.numEntries;
}