diff options
Diffstat (limited to 'apps/database.c')
| -rw-r--r-- | apps/database.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/apps/database.c b/apps/database.c new file mode 100644 index 0000000..1258b94 --- /dev/null +++ b/apps/database.c @@ -0,0 +1,195 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id + * + * Copyright (C) 2005 by Michiel van der Kolk + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#define _GNU_SOURCE +#include <stdio.h> +#include <string.h> +#include "file.h" +#include "screens.h" +#include "kernel.h" +#include "tree.h" +#include "lcd.h" +#include "font.h" +#include "settings.h" +#include "icons.h" +#include "status.h" +#include "debug.h" +#include "button.h" +#include "menu.h" +#include "main_menu.h" +#include "mpeg.h" +#include "misc.h" +#include "ata.h" +#include "wps.h" +#include "filetypes.h" +#include "applimits.h" +#include "icons.h" +#include "lang.h" +#include "keyboard.h" +#include "database.h" + +#undef NEW_DB_CODE + +#ifdef NEW_DB_CODE +static char sbuf[1024]; +static struct file_entry fe; +static int currentferecord; +#endif + +int tagdb_fd = -1; +int tagdb_initialized = 0; +struct tagdb_header tagdbheader; + +int tagdb_init(void) +{ + unsigned char* ptr = (char*)&tagdbheader.version; +#ifdef LITTLE_ENDIAN + int i, *p; +#endif + + tagdb_fd = open(ROCKBOX_DIR "/rockbox.id3db", O_RDONLY); + if (tagdb_fd < 0) { + DEBUGF("Failed opening database\n"); + return -1; + } + read(tagdb_fd, &tagdbheader, 68); + + if (ptr[0] != 'R' || + ptr[1] != 'D' || + ptr[2] != 'B') + { + splash(HZ,true,"Not a rockbox ID3 database!"); + return -1; + } +#ifdef LITTLE_ENDIAN + p=(int *)&tagdbheader; + for(i=0;i<17;i++) { + *p=BE32(p); + p++; + } +#endif + if ( (tagdbheader.version&0xFF) != TAGDB_VERSION) + { + splash(HZ,true,"Unsupported database version %d!", tagdbheader.version&0xFF); + return -1; + } + + if (tagdbheader.songstart > tagdbheader.filestart || + tagdbheader.albumstart > tagdbheader.songstart || + tagdbheader.artiststart > tagdbheader.albumstart) + { + splash(HZ,true,"Corrupt ID3 database!"); + return -1; + } + + tagdb_initialized = 1; + return 0; +} + +void tagdb_shutdown(void) +{ + if (tagdb_fd >= 0) + close(tagdb_fd); + tagdb_initialized = 0; +} + +/* NOTE: All these functions below are yet untested. */ + +#ifdef NEW_DB_CODE +void writetagdbheader() { + lseek(tagdb_fd,0,SEEK_SET); + write(tagdb_fd, &tagdbheader, 68); +} + +void getfentrybyoffset(int offset) { + lseek(tagdb_fd,offset,SEEK_SET); + fread(tagdb_fd,sbuf,tagdbheader.filelen); + fread(tagdb_fd,&fe+sizeof(char *),12); + fe.name=sbuf; + currentferecord=(offset-tagdbheader.filestart)/FILEENTRY_SIZE; +} + +void getfentrybyrecord(int record) { + getfentrybyoffset(FILERECORD2OFFSET(record)); +} + +int getfentrybyfilename(char *fname) { + int min=0; + int max=tagdbheader.filecount; + while(min<max) { + int mid=(min+max)/2; + int compare; + getfentrybyrecord(mid); + compare=strcasecmp(fname,fe.name)); + if(compare==0) + return 1; + else if(compare<0) + max=mid; + else + min=mid+1; + } + return 0; +} + +int shiftdown(int targetoffset, int startingoffset) { + int amount; + if(targetoffset>=startingoffset) { + splash(HZ*2,"Woah. no beeping way. (shiftdown)"); + return 0; + } + lseek(tagdb_fd,startingoffset,SEEK_SET); + while(amount=read(tagdb_fd,sbuf,1024)) { + int written; + startingoffset+=amount; + lseek(tagdb_fd,targetoffset,SEEK_SET); + written=write(tagdb_fd,sbuf,amount); + targetoffset+=written; + if(amount!=written) { + splash(HZ*2,"Something went very wrong. expect database corruption."); + return 0; + } + lseek(tagdb_fd,startingoffset,SEEK_SET); + } + ftruncate(tagdb_fd,lseek(tagdb_fd,0,SEEK_END) - (startingoffset-targetoffset)); + return 1; +} + +int deletefentry(char *fname) { + if(!getfentrybyfilename(fname)) + return 0; + int restrecord = currentferecord+1; + if(currentferecord==tagdbheader.filecount) /* file is last entry */ + ftruncate(tagdb_fd,lseek(tagdb_fd,0,SEEK_END)-FILEENTRY_SIZE); + else + shiftdown(FILERECORD2OFFSET(currentferecord),FILERECORD2OFFSET(restrecord)); + tagdbheader.filecount--; + writetagdbheader(); + return 1; +} + +int getfentrybyhash(int hash) { + int min=0; + for(min=0;min<tagdbheader.filecount;min++) { + getfentrybyrecord(min); + if(hash==fe.hash) + return 1; + } + return 0; +} + +#endif |