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rockbox/apps/tagcache.c
Miika Pekkarinen 6a86036e90 Don't add extra slash at beginning when creating db. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11498 a1c6a512-1295-4272-9138-f99709370657
2006-11-10 09:52:46 +00:00

3871 lines
99 KiB
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Miika Pekkarinen
*
* 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.
*
****************************************************************************/
/*
* TagCache API
*
* ----------x---------x------------------x-----
* | | | External
* +---------------x-------+ | TagCache | Libraries
* | Modification routines | | Core |
* +-x---------x-----------+ | |
* | (R/W) | | | |
* | +------x-------------x-+ +-------------x-----+ |
* | | x==x Filters & clauses | |
* | | Search routines | +-------------------+ |
* | | x============================x DirCache
* | +-x--------------------+ | (optional)
* | | (R) |
* | | +-------------------------------+ +---------+ |
* | | | DB Commit (sort,unique,index) | | | |
* | | +-x--------------------------x--+ | Control | |
* | | | (R/W) | (R) | Thread | |
* | | | +----------------------+ | | | |
* | | | | TagCache DB Builder | | +---------+ |
* | | | +-x-------------x------+ | |
* | | | | (R) | (W) | |
* | | | | +--x--------x---------+ |
* | | | | | Temporary Commit DB | |
* | | | | +---------------------+ |
* +-x----x-------x--+ |
* | TagCache RAM DB x==\(W) +-----------------+ |
* +-----------------+ \===x | |
* | | | | (R) | Ram DB Loader x============x DirCache
* +-x----x---x---x---+ /==x | | (optional)
* | Tagcache Disk DB x==/ +-----------------+ |
* +------------------+ |
*
*/
#include <stdio.h>
#include "config.h"
#include "thread.h"
#include "kernel.h"
#include "system.h"
#include "logf.h"
#include "string.h"
#include "usb.h"
#include "metadata.h"
#include "id3.h"
#include "tagcache.h"
#include "buffer.h"
#include "crc32.h"
#include "misc.h"
#include "settings.h"
#include "dircache.h"
#ifndef __PCTOOL__
#include "atoi.h"
#include "splash.h"
#include "lang.h"
#include "eeprom_settings.h"
#endif
#ifdef __PCTOOL__
#include <ctype.h>
#define yield() do { } while(0)
#define sim_sleep(timeout) do { } while(0)
#endif
#ifndef __PCTOOL__
/* Tag Cache thread. */
static struct event_queue tagcache_queue;
static long tagcache_stack[(DEFAULT_STACK_SIZE + 0x4000)/sizeof(long)];
static const char tagcache_thread_name[] = "tagcache";
#endif
/* Previous path when scanning directory tree recursively. */
static char curpath[TAG_MAXLEN+32];
static long curpath_size = sizeof(curpath);
/* Used when removing duplicates. */
static char *tempbuf; /* Allocated when needed. */
static long tempbufidx; /* Current location in buffer. */
static long tempbuf_size; /* Buffer size (TEMPBUF_SIZE). */
static long tempbuf_left; /* Buffer space left. */
static long tempbuf_pos;
/* Tags we want to get sorted (loaded to the tempbuf). */
static const int sorted_tags[] = { tag_artist, tag_album, tag_genre, tag_composer, tag_title };
/* Uniqued tags (we can use these tags with filters and conditional clauses). */
static const int unique_tags[] = { tag_artist, tag_album, tag_genre, tag_composer };
/* Numeric tags (we can use these tags with conditional clauses). */
static const int numeric_tags[] = { tag_year, tag_tracknumber, tag_length, tag_bitrate,
tag_playcount, tag_playtime, tag_lastplayed, tag_virt_autoscore };
static const char *tags_str[] = { "artist", "album", "genre", "title",
"filename", "composer", "year", "tracknumber", "bitrate", "length",
"playcount", "playtime", "lastplayed" };
/* Status information of the tagcache. */
static struct tagcache_stat tc_stat;
/* Queue commands. */
enum tagcache_queue {
Q_STOP_SCAN = 0,
Q_START_SCAN,
Q_IMPORT_CHANGELOG,
Q_UPDATE,
Q_REBUILD,
};
/* Tag database structures. */
/* Variable-length tag entry in tag files. */
struct tagfile_entry {
short tag_length; /* Length of the data in bytes including '\0' */
short idx_id; /* Corresponding entry location in index file of not unique tags */
char tag_data[0]; /* Begin of the tag data */
};
/* Fixed-size tag entry in master db index. */
struct index_entry {
long tag_seek[TAG_COUNT]; /* Location of tag data or numeric tag data */
long flag; /* Status flags */
};
/* Header is the same in every file. */
struct tagcache_header {
long magic; /* Header version number */
long datasize; /* Data size in bytes */
long entry_count; /* Number of entries in this file */
};
struct master_header {
struct tagcache_header tch;
long serial; /* Increasing counting number */
};
static long current_serial;
#ifdef HAVE_TC_RAMCACHE
/* Header is created when loading database to ram. */
struct ramcache_header {
struct master_header h; /* Header from the master index */
struct index_entry *indices; /* Master index file content */
char *tags[TAG_COUNT]; /* Tag file content (not including filename tag) */
int entry_count[TAG_COUNT]; /* Number of entries in the indices. */
};
# ifdef HAVE_EEPROM_SETTINGS
struct statefile_header {
struct ramcache_header *hdr;
struct tagcache_stat tc_stat;
};
# endif
/* Pointer to allocated ramcache_header */
static struct ramcache_header *hdr;
#endif
/**
* Full tag entries stored in a temporary file waiting
* for commit to the cache. */
struct temp_file_entry {
long tag_offset[TAG_COUNT];
short tag_length[TAG_COUNT];
long flag;
long data_length;
};
struct tempbuf_id_list {
long id;
struct tempbuf_id_list *next;
};
struct tempbuf_searchidx {
long idx_id;
char *str;
int seek;
struct tempbuf_id_list idlist;
};
/* Lookup buffer for fixing messed up index while after sorting. */
static long commit_entry_count;
static long lookup_buffer_depth;
struct tempbuf_searchidx **lookup;
/* Used when building the temporary file. */
static int cachefd = -1, filenametag_fd;
static int total_entry_count = 0;
static int data_size = 0;
static int processed_dir_count;
/* Thread safe locking */
static volatile int write_lock;
static volatile int read_lock;
int tagcache_str_to_tag(const char *str)
{
int i;
for (i = 0; i < (long)(sizeof(tags_str)/sizeof(tags_str[0])); i++)
{
if (!strcasecmp(tags_str[i], str))
return i;
}
return -1;
}
const char* tagcache_tag_to_str(int tag)
{
return tags_str[tag];
}
bool tagcache_is_numeric_tag(int type)
{
int i;
for (i = 0; i < (int)(sizeof(numeric_tags)/sizeof(numeric_tags[0])); i++)
{
if (type == numeric_tags[i])
return true;
}
return false;
}
bool tagcache_is_unique_tag(int type)
{
int i;
for (i = 0; i < (int)(sizeof(unique_tags)/sizeof(unique_tags[0])); i++)
{
if (type == unique_tags[i])
return true;
}
return false;
}
bool tagcache_is_sorted_tag(int type)
{
int i;
for (i = 0; i < (int)(sizeof(sorted_tags)/sizeof(sorted_tags[0])); i++)
{
if (type == sorted_tags[i])
return true;
}
return false;
}
static int open_tag_fd(struct tagcache_header *hdr, int tag, bool write)
{
int fd;
char buf[MAX_PATH];
int rc;
if (tagcache_is_numeric_tag(tag) || tag < 0 || tag >= TAG_COUNT)
return -1;
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, tag);
fd = open(buf, write ? O_RDWR : O_RDONLY);
if (fd < 0)
{
logf("tag file open failed: tag=%d write=%d file=%s", tag, write, buf);
tc_stat.ready = false;
return fd;
}
/* Check the header. */
rc = read(fd, hdr, sizeof(struct tagcache_header));
if (hdr->magic != TAGCACHE_MAGIC || rc != sizeof(struct tagcache_header))
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
return fd;
}
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
static long find_entry_ram(const char *filename,
const struct dircache_entry *dc)
{
static long last_pos = 0;
int counter = 0;
int i;
/* Check if we tagcache is loaded into ram. */
if (!tc_stat.ramcache)
return -1;
if (dc == NULL)
dc = dircache_get_entry_ptr(filename);
if (dc == NULL)
{
logf("tagcache: file not found.");
return -1;
}
try_again:
if (last_pos > 0)
i = last_pos;
else
i = 0;
for (; i < hdr->h.tch.entry_count; i++)
{
if (hdr->indices[i].tag_seek[tag_filename] == (long)dc)
{
last_pos = MAX(0, i - 3);
return i;
}
if (++counter == 100)
{
yield();
counter = 0;
}
}
if (last_pos > 0)
{
last_pos = 0;
goto try_again;
}
return -1;
}
#endif
static long find_entry_disk(const char *filename)
{
struct tagcache_header tch;
static long last_pos = -1;
long pos_history[POS_HISTORY_COUNT];
long pos_history_idx = 0;
bool found = false;
struct tagfile_entry tfe;
int fd;
char buf[TAG_MAXLEN+32];
int i;
int pos = -1;
if (!tc_stat.ready)
return -2;
fd = filenametag_fd;
if (fd < 0)
{
last_pos = -1;
if ( (fd = open_tag_fd(&tch, tag_filename, false)) < 0)
return -1;
}
check_again:
if (last_pos > 0)
lseek(fd, last_pos, SEEK_SET);
else
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
while (true)
{
pos = lseek(fd, 0, SEEK_CUR);
for (i = pos_history_idx-1; i >= 0; i--)
pos_history[i+1] = pos_history[i];
pos_history[0] = pos;
if (read(fd, &tfe, sizeof(struct tagfile_entry)) !=
sizeof(struct tagfile_entry))
{
break ;
}
if (tfe.tag_length >= (long)sizeof(buf))
{
logf("too long tag #1");
close(fd);
last_pos = -1;
return -2;
}
if (read(fd, buf, tfe.tag_length) != tfe.tag_length)
{
logf("read error #2");
close(fd);
last_pos = -1;
return -3;
}
if (!strcasecmp(filename, buf))
{
last_pos = pos_history[pos_history_idx];
found = true;
break ;
}
if (pos_history_idx < POS_HISTORY_COUNT - 1)
pos_history_idx++;
}
/* Not found? */
if (!found)
{
if (last_pos > 0)
{
last_pos = -1;
logf("seek again");
goto check_again;
}
if (fd != filenametag_fd)
close(fd);
return -4;
}
if (fd != filenametag_fd)
close(fd);
return tfe.idx_id;
}
static int find_index(const char *filename)
{
long idx_id = -1;
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
if (tc_stat.ramcache && dircache_is_enabled())
idx_id = find_entry_ram(filename, NULL);
#endif
if (idx_id < 0)
idx_id = find_entry_disk(filename);
return idx_id;
}
bool tagcache_find_index(struct tagcache_search *tcs, const char *filename)
{
int idx_id;
if (!tc_stat.ready)
return false;
idx_id = find_index(filename);
if (idx_id < 0)
return false;
if (!tagcache_search(tcs, tag_filename))
return false;
tcs->entry_count = 0;
tcs->idx_id = idx_id;
return true;
}
static bool get_index(int masterfd, int idxid,
struct index_entry *idx, bool use_ram)
{
if (idxid < 0)
{
logf("Incorrect idxid: %d", idxid);
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tc_stat.ramcache && use_ram)
{
if (hdr->indices[idxid].flag & FLAG_DELETED)
return false;
memcpy(idx, &hdr->indices[idxid], sizeof(struct index_entry));
return true;
}
#else
(void)use_ram;
#endif
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (read(masterfd, idx, sizeof(struct index_entry)) !=
sizeof(struct index_entry))
{
logf("read error #3");
return false;
}
if (idx->flag & FLAG_DELETED)
return false;
return true;
}
static bool write_index(int masterfd, int idxid, struct index_entry *idx)
{
/* We need to exclude all memory only flags & tags when writing to disk. */
if (idx->flag & FLAG_DIRCACHE)
{
logf("memory only flags!");
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tc_stat.ramcache)
{
memcpy(&hdr->indices[idxid], idx, sizeof(struct index_entry));
}
#endif
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (write(masterfd, idx, sizeof(struct index_entry)) !=
sizeof(struct index_entry))
{
logf("write error #3");
logf("idxid: %d", idxid);
return false;
}
return true;
}
static bool open_files(struct tagcache_search *tcs, int tag)
{
if (tcs->idxfd[tag] < 0)
{
char fn[MAX_PATH];
snprintf(fn, sizeof fn, TAGCACHE_FILE_INDEX, tag);
tcs->idxfd[tag] = open(fn, O_RDONLY);
}
if (tcs->idxfd[tag] < 0)
{
logf("File not open!");
return false;
}
return true;
}
static bool retrieve(struct tagcache_search *tcs, struct index_entry *idx,
int tag, char *buf, long size)
{
struct tagfile_entry tfe;
long seek;
*buf = '\0';
if (tagcache_is_numeric_tag(tag))
return false;
seek = idx->tag_seek[tag];
if (seek < 0)
{
logf("Retrieve failed");
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
struct tagfile_entry *ep;
# ifdef HAVE_DIRCACHE
if (tag == tag_filename && idx->flag & FLAG_DIRCACHE)
{
dircache_copy_path((struct dircache_entry *)seek,
buf, size);
return true;
}
else
# endif
if (tag != tag_filename)
{
ep = (struct tagfile_entry *)&hdr->tags[tag][seek];
strncpy(buf, ep->tag_data, size-1);
return true;
}
}
#endif
if (!open_files(tcs, tag))
return false;
lseek(tcs->idxfd[tag], seek, SEEK_SET);
if (read(tcs->idxfd[tag], &tfe, sizeof(struct tagfile_entry)) !=
sizeof(struct tagfile_entry))
{
logf("read error #5");
return false;
}
if (tfe.tag_length >= size)
{
logf("too small buffer");
return false;
}
if (read(tcs->idxfd[tag], buf, tfe.tag_length) !=
tfe.tag_length)
{
logf("read error #6");
return false;
}
buf[tfe.tag_length] = '\0';
return true;
}
static long check_virtual_tags(int tag, const struct index_entry *idx)
{
long data = 0;
switch (tag)
{
case tag_virt_autoscore:
if (idx->tag_seek[tag_length] == 0
|| idx->tag_seek[tag_playcount] == 0)
{
data = 0;
}
else
{
data = 100 * idx->tag_seek[tag_playtime]
/ idx->tag_seek[tag_length]
/ idx->tag_seek[tag_playcount];
}
break;
default:
data = idx->tag_seek[tag];
}
return data;
}
long tagcache_get_numeric(const struct tagcache_search *tcs, int tag)
{
struct index_entry idx;
if (!tc_stat.ready)
return false;
if (!tagcache_is_numeric_tag(tag))
return -1;
if (!get_index(tcs->masterfd, tcs->idx_id, &idx, true))
return -2;
return check_virtual_tags(tag, &idx);
}
inline static bool str_ends_with(const char *str1, const char *str2)
{
int str_len = strlen(str1);
int clause_len = strlen(str2);
if (clause_len > str_len)
return false;
return !strcasecmp(&str1[str_len - clause_len], str2);
}
inline static bool str_oneof(const char *str, const char *list)
{
const char *sep;
int l, len = strlen(str);
while (*list)
{
sep = strchr(list, '|');
l = sep ? (long)sep - (long)list : (int)strlen(list);
if ((l==len) && !strncasecmp(str, list, len))
return true;
list += sep ? l + 1 : l;
}
return false;
}
static bool check_against_clause(long numeric, const char *str,
const struct tagcache_search_clause *clause)
{
if (clause->numeric)
{
switch (clause->type)
{
case clause_is:
return numeric == clause->numeric_data;
case clause_is_not:
return numeric != clause->numeric_data;
case clause_gt:
return numeric > clause->numeric_data;
case clause_gteq:
return numeric >= clause->numeric_data;
case clause_lt:
return numeric < clause->numeric_data;
case clause_lteq:
return numeric <= clause->numeric_data;
default:
logf("Incorrect numeric tag: %d", clause->type);
}
}
else
{
switch (clause->type)
{
case clause_is:
return !strcasecmp(clause->str, str);
case clause_is_not:
return strcasecmp(clause->str, str);
case clause_gt:
return 0>strcasecmp(clause->str, str);
case clause_gteq:
return 0>=strcasecmp(clause->str, str);
case clause_lt:
return 0<strcasecmp(clause->str, str);
case clause_lteq:
return 0<=strcasecmp(clause->str, str);
case clause_contains:
return (strcasestr(str, clause->str) != NULL);
case clause_not_contains:
return (strcasestr(str, clause->str) == NULL);
case clause_begins_with:
return (strcasestr(str, clause->str) == str);
case clause_not_begins_with:
return (strcasestr(str, clause->str) != str);
case clause_ends_with:
return str_ends_with(str, clause->str);
case clause_not_ends_with:
return !str_ends_with(str, clause->str);
case clause_oneof:
return str_oneof(str, clause->str);
default:
logf("Incorrect tag: %d", clause->type);
}
}
return false;
}
bool check_clauses(struct tagcache_search *tcs,
struct index_entry *idx,
struct tagcache_search_clause **clause, int count)
{
int i;
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
/* Go through all conditional clauses. */
for (i = 0; i < count; i++)
{
struct tagfile_entry *tfe;
int seek;
char buf[256];
char *str = NULL;
seek = check_virtual_tags(clause[i]->tag, idx);
if (!tagcache_is_numeric_tag(clause[i]->tag))
{
if (clause[i]->tag == tag_filename)
{
retrieve(tcs, idx, tag_filename, buf, sizeof buf);
str = buf;
}
else
{
tfe = (struct tagfile_entry *)&hdr->tags[clause[i]->tag][seek];
str = tfe->tag_data;
}
}
if (!check_against_clause(seek, str, clause[i]))
return false;
}
}
else
#endif
{
/* Check for conditions. */
for (i = 0; i < count; i++)
{
struct tagfile_entry tfe;
int seek;
char str[256];
seek = check_virtual_tags(clause[i]->tag, idx);
memset(str, 0, sizeof str);
if (!tagcache_is_numeric_tag(clause[i]->tag))
{
int fd = tcs->idxfd[clause[i]->tag];
lseek(fd, seek, SEEK_SET);
read(fd, &tfe, sizeof(struct tagfile_entry));
if (tfe.tag_length >= (int)sizeof(str))
{
logf("Too long tag read!");
break ;
}
read(fd, str, tfe.tag_length);
/* Check if entry has been deleted. */
if (str[0] == '\0')
break;
}
if (!check_against_clause(seek, str, clause[i]))
return false;
}
}
return true;
}
bool tagcache_check_clauses(struct tagcache_search *tcs,
struct tagcache_search_clause **clause, int count)
{
struct index_entry idx;
if (count == 0)
return true;
if (!get_index(tcs->masterfd, tcs->idx_id, &idx, true))
return false;
return check_clauses(tcs, &idx, clause, count);
}
static bool add_uniqbuf(struct tagcache_search *tcs, unsigned long id)
{
int i;
/* If uniq buffer is not defined we must return true for search to work. */
if (tcs->unique_list == NULL
|| (!tagcache_is_unique_tag(tcs->type)
&& !tagcache_is_numeric_tag(tcs->type)))
{
return true;
}
for (i = 0; i < tcs->unique_list_count; i++)
{
/* Return false if entry is found. */
if (tcs->unique_list[i] == id)
return false;
}
if (tcs->unique_list_count < tcs->unique_list_capacity)
{
tcs->unique_list[i] = id;
tcs->unique_list_count++;
}
return true;
}
static bool build_lookup_list(struct tagcache_search *tcs)
{
struct index_entry entry;
int i;
tcs->seek_list_count = 0;
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
int j;
for (i = tcs->seek_pos; i < hdr->h.tch.entry_count; i++)
{
struct index_entry *idx = &hdr->indices[i];
if (tcs->seek_list_count == SEEK_LIST_SIZE)
break ;
/* Skip deleted files. */
if (idx->flag & FLAG_DELETED)
continue;
/* Go through all filters.. */
for (j = 0; j < tcs->filter_count; j++)
{
if (idx->tag_seek[tcs->filter_tag[j]] != tcs->filter_seek[j])
{
break ;
}
}
if (j < tcs->filter_count)
continue ;
/* Check for conditions. */
if (!check_clauses(tcs, idx, tcs->clause, tcs->clause_count))
continue;
/* Add to the seek list if not already in uniq buffer. */
if (!add_uniqbuf(tcs, idx->tag_seek[tcs->type]))
continue;
/* Lets add it. */
tcs->seek_list[tcs->seek_list_count] = idx->tag_seek[tcs->type];
tcs->seek_flags[tcs->seek_list_count] = idx->flag;
tcs->seek_list_count++;
}
tcs->seek_pos = i;
return tcs->seek_list_count > 0;
}
#endif
lseek(tcs->masterfd, tcs->seek_pos * sizeof(struct index_entry) +
sizeof(struct master_header), SEEK_SET);
while (read(tcs->masterfd, &entry, sizeof(struct index_entry)) ==
sizeof(struct index_entry))
{
/* Check if entry has been deleted. */
if (entry.flag & FLAG_DELETED)
continue;
if (tcs->seek_list_count == SEEK_LIST_SIZE)
break ;
/* Go through all filters.. */
for (i = 0; i < tcs->filter_count; i++)
{
if (entry.tag_seek[tcs->filter_tag[i]] != tcs->filter_seek[i])
break ;
}
tcs->seek_pos++;
if (i < tcs->filter_count)
continue ;
/* Check for conditions. */
if (!check_clauses(tcs, &entry, tcs->clause, tcs->clause_count))
continue;
/* Add to the seek list if not already in uniq buffer. */
if (!add_uniqbuf(tcs, entry.tag_seek[tcs->type]))
continue;
/* Lets add it. */
tcs->seek_list[tcs->seek_list_count] = entry.tag_seek[tcs->type];
tcs->seek_flags[tcs->seek_list_count] = entry.flag;
tcs->seek_list_count++;
yield();
}
return tcs->seek_list_count > 0;
}
static void remove_files(void)
{
int i;
char buf[MAX_PATH];
tc_stat.ready = false;
tc_stat.ramcache = false;
remove(TAGCACHE_FILE_MASTER);
for (i = 0; i < TAG_COUNT; i++)
{
if (tagcache_is_numeric_tag(i))
continue;
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, i);
remove(buf);
}
}
static int open_master_fd(struct master_header *hdr, bool write)
{
int fd;
int rc;
fd = open(TAGCACHE_FILE_MASTER, write ? O_RDWR : O_RDONLY);
if (fd < 0)
{
logf("master file open failed for R/W");
tc_stat.ready = false;
return fd;
}
/* Check the header. */
rc = read(fd, hdr, sizeof(struct master_header));
if (hdr->tch.magic != TAGCACHE_MAGIC || rc != sizeof(struct master_header))
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
return fd;
}
bool tagcache_search(struct tagcache_search *tcs, int tag)
{
struct tagcache_header tag_hdr;
struct master_header master_hdr;
int i;
if (tcs->initialized)
tagcache_search_finish(tcs);
while (read_lock)
sleep(1);
memset(tcs, 0, sizeof(struct tagcache_search));
if (tc_stat.commit_step > 0 || !tc_stat.ready)
return false;
tcs->position = sizeof(struct tagcache_header);
tcs->type = tag;
tcs->seek_pos = 0;
tcs->seek_list_count = 0;
tcs->filter_count = 0;
tcs->masterfd = -1;
for (i = 0; i < TAG_COUNT; i++)
tcs->idxfd[i] = -1;
#ifndef HAVE_TC_RAMCACHE
tcs->ramsearch = false;
#else
tcs->ramsearch = tc_stat.ramcache;
if (tcs->ramsearch)
{
tcs->entry_count = hdr->entry_count[tcs->type];
}
else
#endif
{
if (!tagcache_is_numeric_tag(tcs->type))
{
tcs->idxfd[tcs->type] = open_tag_fd(&tag_hdr, tcs->type, false);
if (tcs->idxfd[tcs->type] < 0)
return false;
}
/* Always open as R/W so we can pass tcs to functions that modify data also
* without failing. */
tcs->masterfd = open_master_fd(&master_hdr, true);
if (tcs->masterfd < 0)
return false;
}
tcs->valid = true;
tcs->initialized = true;
write_lock++;
return true;
}
void tagcache_search_set_uniqbuf(struct tagcache_search *tcs,
void *buffer, long length)
{
tcs->unique_list = (unsigned long *)buffer;
tcs->unique_list_capacity = length / sizeof(*tcs->unique_list);
tcs->unique_list_count = 0;
}
bool tagcache_search_add_filter(struct tagcache_search *tcs,
int tag, int seek)
{
if (tcs->filter_count == TAGCACHE_MAX_FILTERS)
return false;
if (!tagcache_is_unique_tag(tag) || tagcache_is_numeric_tag(tag))
return false;
tcs->filter_tag[tcs->filter_count] = tag;
tcs->filter_seek[tcs->filter_count] = seek;
tcs->filter_count++;
return true;
}
bool tagcache_search_add_clause(struct tagcache_search *tcs,
struct tagcache_search_clause *clause)
{
int i;
if (tcs->clause_count >= TAGCACHE_MAX_CLAUSES)
{
logf("Too many clauses");
return false;
}
/* Check if there is already a similar filter in present (filters are
* much faster than clauses).
*/
for (i = 0; i < tcs->filter_count; i++)
{
if (tcs->filter_tag[i] == clause->tag)
return true;
}
if (!tagcache_is_numeric_tag(clause->tag) && tcs->idxfd[clause->tag] < 0)
{
char buf[MAX_PATH];
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, clause->tag);
tcs->idxfd[clause->tag] = open(buf, O_RDONLY);
}
tcs->clause[tcs->clause_count] = clause;
tcs->clause_count++;
return true;
}
#define TAG_FILENAME_RAM(tcs) ((tcs->type == tag_filename) \
? (flag & FLAG_DIRCACHE) : 1)
static bool get_next(struct tagcache_search *tcs)
{
static char buf[TAG_MAXLEN+32];
struct tagfile_entry entry;
long flag = 0;
if (!tcs->valid || !tc_stat.ready)
return false;
if (tcs->idxfd[tcs->type] < 0 && !tagcache_is_numeric_tag(tcs->type)
#ifdef HAVE_TC_RAMCACHE
&& !tcs->ramsearch
#endif
)
return false;
/* Relative fetch. */
if (tcs->filter_count > 0 || tcs->clause_count > 0
|| tagcache_is_numeric_tag(tcs->type))
{
/* Check for end of list. */
if (tcs->seek_list_count == 0)
{
/* Try to fetch more. */
if (!build_lookup_list(tcs))
{
tcs->valid = false;
return false;
}
}
tcs->seek_list_count--;
flag = tcs->seek_flags[tcs->seek_list_count];
/* Seek stream to the correct position and continue to direct fetch. */
if ((!tcs->ramsearch || !TAG_FILENAME_RAM(tcs))
&& !tagcache_is_numeric_tag(tcs->type))
{
if (!open_files(tcs, tcs->type))
return false;
lseek(tcs->idxfd[tcs->type], tcs->seek_list[tcs->seek_list_count], SEEK_SET);
}
else
tcs->position = tcs->seek_list[tcs->seek_list_count];
}
if (tagcache_is_numeric_tag(tcs->type))
{
snprintf(buf, sizeof(buf), "%d", tcs->position);
tcs->result_seek = tcs->position;
tcs->result = buf;
tcs->result_len = strlen(buf) + 1;
return true;
}
/* Direct fetch. */
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch && TAG_FILENAME_RAM(tcs))
{
struct tagfile_entry *ep;
if (tcs->entry_count == 0)
{
tcs->valid = false;
return false;
}
tcs->entry_count--;
tcs->result_seek = tcs->position;
# ifdef HAVE_DIRCACHE
if (tcs->type == tag_filename)
{
dircache_copy_path((struct dircache_entry *)tcs->position,
buf, sizeof buf);
tcs->result = buf;
tcs->result_len = strlen(buf) + 1;
tcs->idx_id = FLAG_GET_ATTR(flag);
tcs->ramresult = false;
return true;
}
# endif
ep = (struct tagfile_entry *)&hdr->tags[tcs->type][tcs->position];
tcs->position += sizeof(struct tagfile_entry) + ep->tag_length;
tcs->result = ep->tag_data;
tcs->result_len = strlen(tcs->result) + 1;
tcs->idx_id = ep->idx_id;
tcs->ramresult = true;
return true;
}
else
#endif
{
if (!open_files(tcs, tcs->type))
return false;
tcs->result_seek = lseek(tcs->idxfd[tcs->type], 0, SEEK_CUR);
if (read(tcs->idxfd[tcs->type], &entry, sizeof(struct tagfile_entry)) !=
sizeof(struct tagfile_entry))
{
/* End of data. */
tcs->valid = false;
return false;
}
}
if (entry.tag_length > (long)sizeof(buf))
{
tcs->valid = false;
logf("too long tag #2");
return false;
}
if (read(tcs->idxfd[tcs->type], buf, entry.tag_length) != entry.tag_length)
{
tcs->valid = false;
logf("read error #4");
return false;
}
tcs->result = buf;
tcs->result_len = strlen(tcs->result) + 1;
tcs->idx_id = entry.idx_id;
tcs->ramresult = false;
return true;
}
bool tagcache_get_next(struct tagcache_search *tcs)
{
while (get_next(tcs))
{
if (tcs->result_len > 1)
return true;
}
return false;
}
bool tagcache_retrieve(struct tagcache_search *tcs, int idxid,
int tag, char *buf, long size)
{
struct index_entry idx;
*buf = '\0';
if (!get_index(tcs->masterfd, idxid, &idx, true))
return false;
return retrieve(tcs, &idx, tag, buf, size);
}
#if 0
void tagcache_modify(struct tagcache_search *tcs, int type, const char *text)
{
struct tagentry *entry;
if (tcs->type != tag_title)
return ;
/* We will need reserve buffer for this. */
if (tcs->ramcache)
{
struct tagfile_entry *ep;
ep = (struct tagfile_entry *)&hdr->tags[tcs->type][tcs->result_seek];
tcs->seek_list[tcs->seek_list_count];
}
entry = find_entry_ram();
}
#endif
void tagcache_search_finish(struct tagcache_search *tcs)
{
int i;
if (!tcs->initialized)
return;
if (tcs->masterfd >= 0)
{
close(tcs->masterfd);
tcs->masterfd = -1;
}
for (i = 0; i < TAG_COUNT; i++)
{
if (tcs->idxfd[i] >= 0)
{
close(tcs->idxfd[i]);
tcs->idxfd[i] = -1;
}
}
tcs->ramsearch = false;
tcs->valid = false;
tcs->initialized = 0;
if (write_lock > 0)
write_lock--;
}
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
static struct tagfile_entry *get_tag(const struct index_entry *entry, int tag)
{
return (struct tagfile_entry *)&hdr->tags[tag][entry->tag_seek[tag]];
}
static long get_tag_numeric(const struct index_entry *entry, int tag)
{
return entry->tag_seek[tag];
}
bool tagcache_fill_tags(struct mp3entry *id3, const char *filename)
{
struct index_entry *entry;
int idx_id;
if (!tc_stat.ready)
return false;
/* Find the corresponding entry in tagcache. */
idx_id = find_entry_ram(filename, NULL);
if (idx_id < 0 || !tc_stat.ramcache)
return false;
entry = &hdr->indices[idx_id];
id3->title = get_tag(entry, tag_title)->tag_data;
id3->artist = get_tag(entry, tag_artist)->tag_data;
id3->album = get_tag(entry, tag_album)->tag_data;
id3->genre_string = get_tag(entry, tag_genre)->tag_data;
id3->composer = get_tag(entry, tag_composer)->tag_data;
id3->year = get_tag_numeric(entry, tag_year);
id3->tracknum = get_tag_numeric(entry, tag_tracknumber);
id3->bitrate = get_tag_numeric(entry, tag_bitrate);
if (id3->bitrate == 0)
id3->bitrate = 1;
return true;
}
#endif
static inline void write_item(const char *item)
{
int len = strlen(item) + 1;
data_size += len;
write(cachefd, item, len);
}
static int check_if_empty(char **tag)
{
int length;
if (*tag == NULL || *tag[0] == '\0')
{
*tag = "<Untagged>";
return 11; /* Tag length */
}
length = strlen(*tag);
if (length > TAG_MAXLEN)
{
logf("over length tag: %s", *tag);
length = TAG_MAXLEN;
*tag[length] = '\0';
}
return length + 1;
}
#define ADD_TAG(entry,tag,data) \
/* Adding tag */ \
entry.tag_offset[tag] = offset; \
entry.tag_length[tag] = check_if_empty(data); \
offset += entry.tag_length[tag]
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
static void add_tagcache(char *path, const struct dircache_entry *dc)
#else
static void add_tagcache(char *path)
#endif
{
struct track_info track;
struct temp_file_entry entry;
bool ret;
int fd;
char tracknumfix[3];
char *genrestr;
int offset = 0;
int path_length = strlen(path);
if (cachefd < 0)
return ;
/* Check for overlength file path. */
if (path_length > TAG_MAXLEN)
{
/* Path can't be shortened. */
logf("Too long path: %s");
return ;
}
/* Check if the file is supported. */
if (probe_file_format(path) == AFMT_UNKNOWN)
return ;
/* Check if the file is already cached. */
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
if (tc_stat.ramcache && dircache_is_enabled())
{
if (find_entry_ram(path, dc) >= 0)
return ;
}
else
#endif
{
if (filenametag_fd >= 0)
{
if (find_entry_disk(path) >= 0)
return ;
}
}
fd = open(path, O_RDONLY);
if (fd < 0)
{
logf("open fail: %s", path);
return ;
}
memset(&track, 0, sizeof(struct track_info));
memset(&entry, 0, sizeof(struct temp_file_entry));
memset(&tracknumfix, 0, sizeof(tracknumfix));
ret = get_metadata(&track, fd, path, false);
close(fd);
if (!ret)
return ;
logf("-> %s", path);
/* Generate track number if missing. */
if (track.id3.tracknum <= 0)
{
const char *p = strrchr(path, '.');
if (p == NULL)
p = &path[strlen(path)-1];
while (*p != '/')
{
if (isdigit(*p) && isdigit(*(p-1)))
{
tracknumfix[1] = *p--;
tracknumfix[0] = *p;
break;
}
p--;
}
if (tracknumfix[0] != '\0')
{
track.id3.tracknum = atoi(tracknumfix);
/* Set a flag to indicate track number has been generated. */
entry.flag |= FLAG_TRKNUMGEN;
}
else
{
/* Unable to generate track number. */
track.id3.tracknum = -1;
}
}
genrestr = id3_get_genre(&track.id3);
/* Numeric tags */
entry.tag_offset[tag_year] = track.id3.year;
entry.tag_offset[tag_tracknumber] = track.id3.tracknum;
entry.tag_offset[tag_length] = track.id3.length;
entry.tag_offset[tag_bitrate] = track.id3.bitrate;
/* String tags. */
ADD_TAG(entry, tag_filename, &path);
ADD_TAG(entry, tag_title, &track.id3.title);
ADD_TAG(entry, tag_artist, &track.id3.artist);
ADD_TAG(entry, tag_album, &track.id3.album);
ADD_TAG(entry, tag_genre, &genrestr);
ADD_TAG(entry, tag_composer, &track.id3.composer);
entry.data_length = offset;
/* Write the header */
write(cachefd, &entry, sizeof(struct temp_file_entry));
/* And tags also... Correct order is critical */
write_item(path);
write_item(track.id3.title);
write_item(track.id3.artist);
write_item(track.id3.album);
write_item(genrestr);
write_item(track.id3.composer);
total_entry_count++;
}
static bool tempbuf_insert(char *str, int id, int idx_id, bool unique)
{
struct tempbuf_searchidx *index = (struct tempbuf_searchidx *)tempbuf;
int len = strlen(str)+1;
int i;
unsigned crc32;
unsigned *crcbuf = (unsigned *)&tempbuf[tempbuf_size-4];
char buf[TAG_MAXLEN+32];
for (i = 0; str[i] != '\0' && i < (int)sizeof(buf)-1; i++)
buf[i] = tolower(str[i]);
buf[i] = '\0';
crc32 = crc_32(buf, i, 0xffffffff);
if (unique)
{
/* Check if the crc does not exist -> entry does not exist for sure. */
for (i = 0; i < tempbufidx; i++)
{
if (crcbuf[-i] != crc32)
continue;
if (!strcasecmp(str, index[i].str))
{
if (id < 0 || id >= lookup_buffer_depth)
{
logf("lookup buf overf.: %d", id);
return false;
}
lookup[id] = &index[i];
return true;
}
}
}
/* Insert to CRC buffer. */
crcbuf[-tempbufidx] = crc32;
tempbuf_left -= 4;
/* Insert it to the buffer. */
tempbuf_left -= len;
if (tempbuf_left - 4 < 0 || tempbufidx >= commit_entry_count-1)
return false;
if (id >= lookup_buffer_depth)
{
logf("lookup buf overf. #2: %d", id);
return false;
}
if (id >= 0)
{
lookup[id] = &index[tempbufidx];
index[tempbufidx].idlist.id = id;
}
else
index[tempbufidx].idlist.id = -1;
index[tempbufidx].idlist.next = NULL;
index[tempbufidx].idx_id = idx_id;
index[tempbufidx].seek = -1;
index[tempbufidx].str = &tempbuf[tempbuf_pos];
memcpy(index[tempbufidx].str, str, len);
tempbuf_pos += len;
tempbufidx++;
return true;
}
static int compare(const void *p1, const void *p2)
{
struct tempbuf_searchidx *e1 = (struct tempbuf_searchidx *)p1;
struct tempbuf_searchidx *e2 = (struct tempbuf_searchidx *)p2;
/*
if (!strncasecmp("the ", e1, 4))
e1 = &e1[4];
if (!strncasecmp("the ", e2, 4))
e2 = &e2[4];
*/
return strncasecmp(e1->str, e2->str, TAG_MAXLEN);
}
static int tempbuf_sort(int fd)
{
struct tempbuf_searchidx *index = (struct tempbuf_searchidx *)tempbuf;
struct tagfile_entry fe;
int i;
int length;
/* Generate reverse lookup entries. */
for (i = 0; i < lookup_buffer_depth; i++)
{
struct tempbuf_id_list *idlist;
if (!lookup[i])
continue;
if (lookup[i]->idlist.id == i)
continue;
idlist = &lookup[i]->idlist;
while (idlist->next != NULL)
idlist = idlist->next;
tempbuf_left -= sizeof(struct tempbuf_id_list);
if (tempbuf_left - 4 < 0)
return -1;
idlist->next = (struct tempbuf_id_list *)&tempbuf[tempbuf_pos];
if (tempbuf_pos & 0x03)
{
tempbuf_pos = (tempbuf_pos & ~0x03) + 0x04;
tempbuf_left -= 3;
idlist->next = (struct tempbuf_id_list *)&tempbuf[tempbuf_pos];
}
tempbuf_pos += sizeof(struct tempbuf_id_list);
idlist = idlist->next;
idlist->id = i;
idlist->next = NULL;
}
qsort(index, tempbufidx, sizeof(struct tempbuf_searchidx), compare);
memset(lookup, 0, lookup_buffer_depth * sizeof(struct tempbuf_searchidx **));
for (i = 0; i < tempbufidx; i++)
{
struct tempbuf_id_list *idlist = &index[i].idlist;
/* Fix the lookup list. */
while (idlist != NULL)
{
if (idlist->id >= 0)
lookup[idlist->id] = &index[i];
idlist = idlist->next;
}
index[i].seek = lseek(fd, 0, SEEK_CUR);
length = strlen(index[i].str) + 1;
fe.tag_length = length;
fe.idx_id = index[i].idx_id;
/* Check the chunk alignment. */
if ((fe.tag_length + sizeof(struct tagfile_entry))
% TAGFILE_ENTRY_CHUNK_LENGTH)
{
fe.tag_length += TAGFILE_ENTRY_CHUNK_LENGTH -
((fe.tag_length + sizeof(struct tagfile_entry))
% TAGFILE_ENTRY_CHUNK_LENGTH);
}
#ifdef TAGCACHE_STRICT_ALIGN
/* Make sure the entry is long aligned. */
if (index[i].seek & 0x03)
{
logf("tempbuf_sort: alignment error!");
return -3;
}
#endif
if (write(fd, &fe, sizeof(struct tagfile_entry)) !=
sizeof(struct tagfile_entry))
{
logf("tempbuf_sort: write error #1");
return -1;
}
if (write(fd, index[i].str, length) != length)
{
logf("tempbuf_sort: write error #2");
return -2;
}
/* Write some padding. */
if (fe.tag_length - length > 0)
write(fd, "XXXXXXXX", fe.tag_length - length);
}
return i;
}
inline static struct tempbuf_searchidx* tempbuf_locate(int id)
{
if (id < 0 || id >= lookup_buffer_depth)
return NULL;
return lookup[id];
}
inline static int tempbuf_find_location(int id)
{
struct tempbuf_searchidx *entry;
entry = tempbuf_locate(id);
if (entry == NULL)
return -1;
return entry->seek;
}
static bool build_numeric_indices(struct tagcache_header *h, int tmpfd)
{
struct master_header tcmh;
struct index_entry idx;
int masterfd;
int masterfd_pos;
struct temp_file_entry *entrybuf = (struct temp_file_entry *)tempbuf;
int max_entries;
int entries_processed = 0;
int i, j;
max_entries = tempbuf_size / sizeof(struct temp_file_entry) - 1;
logf("Building numeric indices...");
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
if ( (masterfd = open_master_fd(&tcmh, true)) < 0)
return false;
masterfd_pos = lseek(masterfd, tcmh.tch.entry_count * sizeof(struct index_entry),
SEEK_CUR);
if (masterfd_pos == filesize(masterfd))
{
logf("we can't append!");
close(masterfd);
return false;
}
while (entries_processed < h->entry_count)
{
int count = MIN(h->entry_count, max_entries);
/* Read in as many entries as possible. */
for (i = 0; i < count; i++)
{
/* Read in numeric data. */
if (read(tmpfd, &entrybuf[i], sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #1");
close(masterfd);
return false;
}
/* Skip string data. */
lseek(tmpfd, entrybuf[i].data_length, SEEK_CUR);
}
/* Commit the data to the index. */
for (i = 0; i < count; i++)
{
int loc = lseek(masterfd, 0, SEEK_CUR);
if (read(masterfd, &idx, sizeof(struct index_entry)) !=
sizeof(struct index_entry))
{
logf("read fail #2");
close(masterfd);
return false;
}
for (j = 0; j < TAG_COUNT; j++)
{
if (!tagcache_is_numeric_tag(j))
continue;
idx.tag_seek[j] = entrybuf[i].tag_offset[j];
}
idx.flag = entrybuf[i].flag;
/* Write back the updated index. */
lseek(masterfd, loc, SEEK_SET);
if (write(masterfd, &idx, sizeof(struct index_entry)) !=
sizeof(struct index_entry))
{
logf("write fail");
close(masterfd);
return false;
}
}
entries_processed += count;
logf("%d/%d entries processed", entries_processed, h->entry_count);
}
close(masterfd);
return true;
}
/**
* Return values:
* > 0 success
* == 0 temporary failure
* < 0 fatal error
*/
static int build_index(int index_type, struct tagcache_header *h, int tmpfd)
{
int i;
struct tagcache_header tch;
struct master_header tcmh;
struct index_entry idxbuf[IDX_BUF_DEPTH];
int idxbuf_pos;
char buf[TAG_MAXLEN+32];
int fd = -1, masterfd;
bool error = false;
int init;
int masterfd_pos;
logf("Building index: %d", index_type);
/* Check the number of entries we need to allocate ram for. */
commit_entry_count = h->entry_count + 1;
masterfd = open_master_fd(&tcmh, false);
if (masterfd >= 0)
{
commit_entry_count += tcmh.tch.entry_count;
close(masterfd);
}
/* Open the index file, which contains the tag names. */
fd = open_tag_fd(&tch, index_type, true);
if (fd >= 0)
{
logf("tch.datasize=%d", tch.datasize);
lookup_buffer_depth = 1 +
/* First part */ commit_entry_count +
/* Second part */ (tch.datasize / TAGFILE_ENTRY_CHUNK_LENGTH);
}
else
{
lookup_buffer_depth = 1 +
/* First part */ commit_entry_count +
/* Second part */ 0;
}
logf("lookup_buffer_depth=%d", lookup_buffer_depth);
logf("commit_entry_count=%d", commit_entry_count);
/* Allocate buffer for all index entries from both old and new
* tag files. */
tempbufidx = 0;
tempbuf_pos = commit_entry_count * sizeof(struct tempbuf_searchidx);
/* Allocate lookup buffer. The first portion of commit_entry_count
* contains the new tags in the temporary file and the second
* part for locating entries already in the db.
*
* New tags Old tags
* +---------+---------------------------+
* | index | position/ENTRY_CHUNK_SIZE | lookup buffer
* +---------+---------------------------+
*
* Old tags are inserted to a temporary buffer with position:
* tempbuf_insert(position/ENTRY_CHUNK_SIZE, ...);
* And new tags with index:
* tempbuf_insert(idx, ...);
*
* The buffer is sorted and written into tag file:
* tempbuf_sort(...);
* leaving master index locations messed up.
*
* That is fixed using the lookup buffer for old tags:
* new_seek = tempbuf_find_location(old_seek, ...);
* and for new tags:
* new_seek = tempbuf_find_location(idx);
*/
lookup = (struct tempbuf_searchidx **)&tempbuf[tempbuf_pos];
tempbuf_pos += lookup_buffer_depth * sizeof(void **);
memset(lookup, 0, lookup_buffer_depth * sizeof(void **));
/* And calculate the remaining data space used mainly for storing
* tag data (strings). */
tempbuf_left = tempbuf_size - tempbuf_pos - 8;
if (tempbuf_left - TAGFILE_ENTRY_AVG_LENGTH * commit_entry_count < 0)
{
logf("Buffer way too small!");
return 0;
}
if (fd >= 0)
{
/**
* If tag file contains unique tags (sorted index), we will load
* it entirely into memory so we can resort it later for use with
* chunked browsing.
*/
if (tagcache_is_sorted_tag(index_type))
{
logf("loading tags...");
for (i = 0; i < tch.entry_count; i++)
{
struct tagfile_entry entry;
int loc = lseek(fd, 0, SEEK_CUR);
bool ret;
if (read(fd, &entry, sizeof(struct tagfile_entry))
!= sizeof(struct tagfile_entry))
{
logf("read error #7");
close(fd);
return -2;
}
if (entry.tag_length >= (int)sizeof(buf))
{
logf("too long tag #3");
close(fd);
return -2;
}
if (read(fd, buf, entry.tag_length) != entry.tag_length)
{
logf("read error #8");
close(fd);
return -2;
}
/* Skip deleted entries. */
if (buf[0] == '\0')
continue;
/**
* Save the tag and tag id in the memory buffer. Tag id
* is saved so we can later reindex the master lookup
* table when the index gets resorted.
*/
ret = tempbuf_insert(buf, loc/TAGFILE_ENTRY_CHUNK_LENGTH
+ commit_entry_count, entry.idx_id,
tagcache_is_unique_tag(index_type));
if (!ret)
{
close(fd);
return -3;
}
yield();
}
logf("done");
}
else
tempbufidx = tch.entry_count;
}
else
{
/**
* Creating new index file to store the tags. No need to preload
* anything whether the index type is sorted or not.
*/
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, index_type);
fd = open(buf, O_WRONLY | O_CREAT | O_TRUNC);
if (fd < 0)
{
logf("%s open fail", buf);
return -2;
}
tch.magic = TAGCACHE_MAGIC;
tch.entry_count = 0;
tch.datasize = 0;
if (write(fd, &tch, sizeof(struct tagcache_header)) !=
sizeof(struct tagcache_header))
{
logf("header write failed");
close(fd);
return -2;
}
}
/* Loading the tag lookup file as "master file". */
logf("Loading index file");
masterfd = open(TAGCACHE_FILE_MASTER, O_RDWR);
if (masterfd < 0)
{
logf("Creating new index");
masterfd = open(TAGCACHE_FILE_MASTER, O_WRONLY | O_CREAT | O_TRUNC);
if (masterfd < 0)
{
logf("Failure to create index file (%s)", TAGCACHE_FILE_MASTER);
close(fd);
return -2;
}
/* Write the header (write real values later). */
memset(&tcmh, 0, sizeof(struct master_header));
tcmh.tch = *h;
tcmh.tch.entry_count = 0;
tcmh.tch.datasize = 0;
write(masterfd, &tcmh, sizeof(struct master_header));
init = true;
masterfd_pos = lseek(masterfd, 0, SEEK_CUR);
current_serial = 0;
}
else
{
/**
* Master file already exists so we need to process the current
* file first.
*/
init = false;
if (read(masterfd, &tcmh, sizeof(struct master_header)) !=
sizeof(struct master_header) || tcmh.tch.magic != TAGCACHE_MAGIC)
{
logf("header error");
close(fd);
close(masterfd);
return -2;
}
/**
* If we reach end of the master file, we need to expand it to
* hold new tags. If the current index is not sorted, we can
* simply append new data to end of the file.
* However, if the index is sorted, we need to update all tag
* pointers in the master file for the current index.
*/
masterfd_pos = lseek(masterfd, tcmh.tch.entry_count * sizeof(struct index_entry),
SEEK_CUR);
if (masterfd_pos == filesize(masterfd))
{
logf("appending...");
init = true;
}
}
/**
* Load new unique tags in memory to be sorted later and added
* to the master lookup file.
*/
if (tagcache_is_sorted_tag(index_type))
{
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
/* h is the header of the temporary file containing new tags. */
logf("inserting new tags...");
for (i = 0; i < h->entry_count; i++)
{
struct temp_file_entry entry;
if (read(tmpfd, &entry, sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #1");
error = true;
goto error_exit;
}
/* Read data. */
if (entry.tag_length[index_type] >= (long)sizeof(buf))
{
logf("too long entry!");
error = true;
goto error_exit;
}
lseek(tmpfd, entry.tag_offset[index_type], SEEK_CUR);
if (read(tmpfd, buf, entry.tag_length[index_type]) !=
entry.tag_length[index_type])
{
logf("read fail #3");
error = true;
goto error_exit;
}
if (tagcache_is_unique_tag(index_type))
error = !tempbuf_insert(buf, i, -1, true);
else
error = !tempbuf_insert(buf, i, tcmh.tch.entry_count + i, false);
if (error)
{
logf("insert error");
goto error_exit;
}
/* Skip to next. */
lseek(tmpfd, entry.data_length - entry.tag_offset[index_type] -
entry.tag_length[index_type], SEEK_CUR);
yield();
}
logf("done");
/* Sort the buffer data and write it to the index file. */
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
i = tempbuf_sort(fd);
if (i < 0)
goto error_exit;
logf("sorted %d tags", i);
/**
* Now update all indexes in the master lookup file.
*/
logf("updating indices...");
lseek(masterfd, sizeof(struct master_header), SEEK_SET);
for (i = 0; i < tcmh.tch.entry_count; i += idxbuf_pos)
{
int j;
int loc = lseek(masterfd, 0, SEEK_CUR);
idxbuf_pos = MIN(tcmh.tch.entry_count - i, IDX_BUF_DEPTH);
if (read(masterfd, idxbuf, sizeof(struct index_entry)*idxbuf_pos) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("read fail #2");
error = true;
goto error_exit ;
}
lseek(masterfd, loc, SEEK_SET);
for (j = 0; j < idxbuf_pos; j++)
{
if (idxbuf[j].flag & FLAG_DELETED)
{
/* We can just ignore deleted entries. */
idxbuf[j].tag_seek[index_type] = 0;
continue;
}
idxbuf[j].tag_seek[index_type] = tempbuf_find_location(
idxbuf[j].tag_seek[index_type]/TAGFILE_ENTRY_CHUNK_LENGTH
+ commit_entry_count);
if (idxbuf[j].tag_seek[index_type] < 0)
{
logf("update error: %d/%d", i+j, tcmh.tch.entry_count);
error = true;
goto error_exit;
}
yield();
}
/* Write back the updated index. */
if (write(masterfd, idxbuf, sizeof(struct index_entry)*idxbuf_pos) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("write fail");
error = true;
goto error_exit;
}
}
logf("done");
}
/**
* Walk through the temporary file containing the new tags.
*/
// build_normal_index(h, tmpfd, masterfd, idx);
logf("updating new indices...");
lseek(masterfd, masterfd_pos, SEEK_SET);
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
lseek(fd, 0, SEEK_END);
for (i = 0; i < h->entry_count; i += idxbuf_pos)
{
int j;
idxbuf_pos = MIN(h->entry_count - i, IDX_BUF_DEPTH);
if (init)
{
memset(idxbuf, 0, sizeof(struct index_entry)*IDX_BUF_DEPTH);
}
else
{
int loc = lseek(masterfd, 0, SEEK_CUR);
if (read(masterfd, idxbuf, sizeof(struct index_entry)*idxbuf_pos) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("read fail #2");
error = true;
break ;
}
lseek(masterfd, loc, SEEK_SET);
}
/* Read entry headers. */
for (j = 0; j < idxbuf_pos; j++)
{
if (!tagcache_is_sorted_tag(index_type))
{
struct temp_file_entry entry;
struct tagfile_entry fe;
if (read(tmpfd, &entry, sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #1");
error = true;
break ;
}
/* Read data. */
if (entry.tag_length[index_type] >= (int)sizeof(buf))
{
logf("too long entry!");
logf("length=%d", entry.tag_length[index_type]);
logf("pos=0x%02x", lseek(tmpfd, 0, SEEK_CUR));
error = true;
break ;
}
lseek(tmpfd, entry.tag_offset[index_type], SEEK_CUR);
if (read(tmpfd, buf, entry.tag_length[index_type]) !=
entry.tag_length[index_type])
{
logf("read fail #3");
logf("offset=0x%02x", entry.tag_offset[index_type]);
logf("length=0x%02x", entry.tag_length[index_type]);
error = true;
break ;
}
/* Write to index file. */
idxbuf[j].tag_seek[index_type] = lseek(fd, 0, SEEK_CUR);
fe.tag_length = entry.tag_length[index_type];
fe.idx_id = tcmh.tch.entry_count + i + j;
write(fd, &fe, sizeof(struct tagfile_entry));
write(fd, buf, fe.tag_length);
tempbufidx++;
/* Skip to next. */
lseek(tmpfd, entry.data_length - entry.tag_offset[index_type] -
entry.tag_length[index_type], SEEK_CUR);
}
else
{
/* Locate the correct entry from the sorted array. */
idxbuf[j].tag_seek[index_type] = tempbuf_find_location(i + j);
if (idxbuf[j].tag_seek[index_type] < 0)
{
logf("entry not found (%d)");
error = true;
break ;
}
}
}
/* Write index. */
if (write(masterfd, idxbuf, sizeof(struct index_entry)*idxbuf_pos) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("tagcache: write fail #4");
error = true;
break ;
}
yield();
}
logf("done");
/* Finally write the header. */
tch.magic = TAGCACHE_MAGIC;
tch.entry_count = tempbufidx;
tch.datasize = lseek(fd, 0, SEEK_END) - sizeof(struct tagcache_header);
lseek(fd, 0, SEEK_SET);
write(fd, &tch, sizeof(struct tagcache_header));
if (index_type != tag_filename)
h->datasize += tch.datasize;
logf("s:%d/%d/%d", index_type, tch.datasize, h->datasize);
error_exit:
close(fd);
close(masterfd);
if (error)
return -2;
return 1;
}
static bool commit(void)
{
struct tagcache_header tch;
struct master_header tcmh;
int i, len, rc;
int tmpfd;
int masterfd;
#ifdef HAVE_DIRCACHE
bool dircache_buffer_stolen = false;
#endif
bool local_allocation = false;
logf("committing tagcache");
while (write_lock)
sleep(1);
tmpfd = open(TAGCACHE_FILE_TEMP, O_RDONLY);
if (tmpfd < 0)
{
logf("nothing to commit");
return true;
}
/* Load the header. */
len = sizeof(struct tagcache_header);
rc = read(tmpfd, &tch, len);
if (tch.magic != TAGCACHE_MAGIC || rc != len)
{
logf("incorrect header");
close(tmpfd);
remove(TAGCACHE_FILE_TEMP);
return false;
}
if (tch.entry_count == 0)
{
logf("nothing to commit");
close(tmpfd);
remove(TAGCACHE_FILE_TEMP);
return true;
}
#ifdef HAVE_EEPROM_SETTINGS
remove(TAGCACHE_STATEFILE);
#endif
/* At first be sure to unload the ramcache! */
#ifdef HAVE_TC_RAMCACHE
tc_stat.ramcache = false;
#endif
read_lock++;
/* Try to steal every buffer we can :) */
if (tempbuf_size == 0)
local_allocation = true;
#ifdef HAVE_DIRCACHE
if (tempbuf_size == 0)
{
/* Try to steal the dircache buffer. */
tempbuf = dircache_steal_buffer(&tempbuf_size);
tempbuf_size &= ~0x03;
if (tempbuf_size > 0)
{
dircache_buffer_stolen = true;
}
}
#endif
#ifdef HAVE_TC_RAMCACHE
if (tempbuf_size == 0 && tc_stat.ramcache_allocated > 0)
{
tempbuf = (char *)(hdr + 1);
tempbuf_size = tc_stat.ramcache_allocated - sizeof(struct ramcache_header) - 128;
tempbuf_size &= ~0x03;
}
#endif
/* And finally fail if there are no buffers available. */
if (tempbuf_size == 0)
{
logf("delaying commit until next boot");
tc_stat.commit_delayed = true;
close(tmpfd);
read_lock--;
return false;
}
logf("commit %d entries...", tch.entry_count);
/* Now create the index files. */
tc_stat.commit_step = 0;
tch.datasize = 0;
tc_stat.commit_delayed = false;
for (i = 0; i < TAG_COUNT; i++)
{
int ret;
if (tagcache_is_numeric_tag(i))
continue;
tc_stat.commit_step++;
ret = build_index(i, &tch, tmpfd);
if (ret <= 0)
{
close(tmpfd);
logf("tagcache failed init");
if (ret < 0)
remove_files();
else
tc_stat.commit_delayed = true;
tc_stat.commit_step = 0;
read_lock--;
return false;
}
}
build_numeric_indices(&tch, tmpfd);
close(tmpfd);
tc_stat.commit_step = 0;
/* Update the master index headers. */
if ( (masterfd = open_master_fd(&tcmh, true)) < 0)
{
read_lock--;
return false;
}
tcmh.tch.entry_count += tch.entry_count;
tcmh.tch.datasize = sizeof(struct master_header)
+ sizeof(struct index_entry) * tcmh.tch.entry_count
+ tch.datasize;
lseek(masterfd, 0, SEEK_SET);
write(masterfd, &tcmh, sizeof(struct master_header));
close(masterfd);
logf("tagcache committed");
remove(TAGCACHE_FILE_TEMP);
tc_stat.ready = true;
if (local_allocation)
{
tempbuf = NULL;
tempbuf_size = 0;
}
#ifdef HAVE_DIRCACHE
/* Rebuild the dircache, if we stole the buffer. */
if (dircache_buffer_stolen)
dircache_build(0);
#endif
#ifdef HAVE_TC_RAMCACHE
/* Reload tagcache. */
if (tc_stat.ramcache_allocated > 0)
tagcache_start_scan();
#endif
read_lock--;
return true;
}
static void allocate_tempbuf(void)
{
/* Yeah, malloc would be really nice now :) */
#ifdef __PCTOOL__
tempbuf_size = 32*1024*1024;
tempbuf = malloc(tempbuf_size);
#else
tempbuf = (char *)(((long)audiobuf & ~0x03) + 0x04);
tempbuf_size = (long)audiobufend - (long)audiobuf - 4;
audiobuf += tempbuf_size;
#endif
}
static void free_tempbuf(void)
{
if (tempbuf_size == 0)
return ;
#ifdef __PCTOOL__
free(tempbuf);
#else
audiobuf -= tempbuf_size;
#endif
tempbuf = NULL;
tempbuf_size = 0;
}
static bool update_current_serial(long serial)
{
struct master_header myhdr;
int fd;
if ( (fd = open_master_fd(&myhdr, true)) < 0)
return false;
myhdr.serial = serial;
current_serial = serial;
#ifdef HAVE_TC_RAMCACHE
if (hdr)
hdr->h.serial = serial;
#endif
/* Write it back */
lseek(fd, 0, SEEK_SET);
write(fd, &myhdr, sizeof(struct master_header));
close(fd);
return true;
}
long tagcache_increase_serial(void)
{
if (!tc_stat.ready)
return -2;
while (read_lock)
sleep(1);
if (!update_current_serial(current_serial + 1))
return -1;
return current_serial;
}
long tagcache_get_serial(void)
{
return current_serial;
}
static bool modify_numeric_entry(int masterfd, int idx_id, int tag, long data)
{
struct index_entry idx;
if (!tc_stat.ready)
return false;
if (!tagcache_is_numeric_tag(tag))
return false;
if (!get_index(masterfd, idx_id, &idx, false))
return false;
idx.tag_seek[tag] = data;
idx.flag |= FLAG_DIRTYNUM;
return write_index(masterfd, idx_id, &idx);
}
bool tagcache_modify_numeric_entry(struct tagcache_search *tcs,
int tag, long data)
{
struct master_header myhdr;
if (tcs->masterfd < 0)
{
if ( (tcs->masterfd = open_master_fd(&myhdr, true)) < 0)
return false;
}
return modify_numeric_entry(tcs->masterfd, tcs->idx_id, tag, data);
}
static bool write_tag(int fd, const char *tagstr, const char *datastr)
{
char buf[256];
int i;
snprintf(buf, sizeof buf, "%s=\"", tagstr);
for (i = strlen(buf); i < (long)sizeof(buf)-2; i++)
{
if (*datastr == '\0')
break;
if (*datastr == '"')
{
buf[i] = '\\';
datastr++;
continue;
}
buf[i] = *(datastr++);
}
strcpy(&buf[i], "\" ");
write(fd, buf, i + 2);
return true;
}
static bool read_tag(char *dest, long size,
const char *src, const char *tagstr)
{
int pos;
char current_tag[32];
while (*src != '\0')
{
/* Skip all whitespace */
while (*src == ' ')
src++;
if (*src == '\0')
break;
pos = 0;
/* Read in tag name */
while (*src != '=' && *src != ' ')
{
current_tag[pos] = *src;
src++;
pos++;
if (*src == '\0' || pos >= (long)sizeof(current_tag))
return false;
}
current_tag[pos] = '\0';
/* Read in tag data */
/* Find the start. */
while (*src != '"' && *src != '\0')
src++;
if (*src == '\0' || *(++src) == '\0')
return false;
/* Read the data. */
for (pos = 0; pos < size; pos++)
{
if (*src == '\0')
break;
if (*src == '\\' && *(src+1) == '"')
{
dest[pos] = '"';
src += 2;
continue;
}
dest[pos] = *src;
if (*src == '"')
{
src++;
break;
}
if (*src == '\0')
break;
src++;
}
dest[pos] = '\0';
if (!strcasecmp(tagstr, current_tag))
return true;
}
return false;
}
static int parse_changelog_line(int line_n, const char *buf, void *parameters)
{
struct index_entry idx;
char tag_data[TAG_MAXLEN+32];
int idx_id;
long masterfd = (long)parameters;
const int import_tags[] = { tag_playcount, tag_playtime, tag_lastplayed };
int i;
(void)line_n;
if (*buf == '#')
return 0;
logf("%d/%s", line_n, buf);
if (!read_tag(tag_data, sizeof tag_data, buf, "filename"))
{
logf("filename missing");
logf("-> %s", buf);
return 0;
}
idx_id = find_index(tag_data);
if (idx_id < 0)
{
logf("entry not found");
return 0;
}
if (!get_index(masterfd, idx_id, &idx, false))
{
logf("failed to retrieve index entry");
return 0;
}
/* Stop if tag has already been modified. */
if (idx.flag & FLAG_DIRTYNUM)
return 0;
logf("import: %s", tag_data);
idx.flag |= FLAG_DIRTYNUM;
for (i = 0; i < (long)(sizeof(import_tags)/sizeof(import_tags[0])); i++)
{
int data;
if (!read_tag(tag_data, sizeof tag_data, buf,
tagcache_tag_to_str(import_tags[i])))
{
continue;
}
data = atoi(tag_data);
if (data < 0)
continue;
idx.tag_seek[import_tags[i]] = data;
if (import_tags[i] == tag_lastplayed && data > current_serial)
current_serial = data;
}
return write_index(masterfd, idx_id, &idx) ? 0 : -5;
}
#ifndef __PCTOOL__
bool tagcache_import_changelog(void)
{
struct master_header myhdr;
struct tagcache_header tch;
int clfd;
long masterfd;
char buf[2048];
if (!tc_stat.ready)
return false;
while (read_lock)
sleep(1);
clfd = open(TAGCACHE_FILE_CHANGELOG, O_RDONLY);
if (clfd < 0)
{
logf("failure to open changelog");
return false;
}
if ( (masterfd = open_master_fd(&myhdr, true)) < 0)
{
close(clfd);
return false;
}
write_lock++;
filenametag_fd = open_tag_fd(&tch, tag_filename, false);
fast_readline(clfd, buf, sizeof buf, (long *)masterfd,
parse_changelog_line);
close(clfd);
close(masterfd);
if (filenametag_fd >= 0)
close(filenametag_fd);
write_lock--;
update_current_serial(current_serial);
return true;
}
#endif
bool tagcache_create_changelog(struct tagcache_search *tcs)
{
struct master_header myhdr;
struct index_entry idx;
char buf[TAG_MAXLEN+32];
char temp[32];
int clfd;
int i, j;
if (!tc_stat.ready)
return false;
if (!tagcache_search(tcs, tag_filename))
return false;
/* Initialize the changelog */
clfd = open(TAGCACHE_FILE_CHANGELOG, O_WRONLY | O_CREAT | O_TRUNC);
if (clfd < 0)
{
logf("failure to open changelog");
return false;
}
if (tcs->masterfd < 0)
{
if ( (tcs->masterfd = open_master_fd(&myhdr, false)) < 0)
return false;
}
else
{
lseek(tcs->masterfd, 0, SEEK_SET);
read(tcs->masterfd, &myhdr, sizeof(struct master_header));
}
write(clfd, "## Changelog version 1\n", 23);
for (i = 0; i < myhdr.tch.entry_count; i++)
{
if (read(tcs->masterfd, &idx, sizeof(struct index_entry))
!= sizeof(struct index_entry))
{
logf("read error #9");
tagcache_search_finish(tcs);
close(clfd);
return false;
}
/* Skip until the entry found has been modified. */
if (! (idx.flag & FLAG_DIRTYNUM) )
continue;
/* Now retrieve all tags. */
for (j = 0; j < TAG_COUNT; j++)
{
if (tagcache_is_numeric_tag(j))
{
snprintf(temp, sizeof temp, "%d", idx.tag_seek[j]);
write_tag(clfd, tagcache_tag_to_str(j), temp);
continue;
}
tcs->type = j;
tagcache_retrieve(tcs, i, tcs->type, buf, sizeof buf);
write_tag(clfd, tagcache_tag_to_str(j), buf);
}
write(clfd, "\n", 1);
yield();
}
close(clfd);
tagcache_search_finish(tcs);
return true;
}
static bool delete_entry(long idx_id)
{
int fd;
int tag, i;
struct index_entry idx, myidx;
struct master_header myhdr;
char buf[TAG_MAXLEN+32];
int in_use[TAG_COUNT];
logf("delete_entry(): %d", idx_id);
#ifdef HAVE_TC_RAMCACHE
/* At first mark the entry removed from ram cache. */
if (hdr)
hdr->indices[idx_id].flag |= FLAG_DELETED;
#endif
if ( (fd = open_master_fd(&myhdr, true) ) < 0)
return false;
lseek(fd, idx_id * sizeof(struct index_entry), SEEK_CUR);
if (read(fd, &myidx, sizeof(struct index_entry))
!= sizeof(struct index_entry))
{
logf("delete_entry(): read error");
close(fd);
return false;
}
myidx.flag |= FLAG_DELETED;
lseek(fd, -sizeof(struct index_entry), SEEK_CUR);
if (write(fd, &myidx, sizeof(struct index_entry))
!= sizeof(struct index_entry))
{
logf("delete_entry(): write_error");
close(fd);
return false;
}
/* Now check which tags are no longer in use (if any) */
for (tag = 0; tag < TAG_COUNT; tag++)
in_use[tag] = 0;
lseek(fd, sizeof(struct master_header), SEEK_SET);
for (i = 0; i < myhdr.tch.entry_count; i++)
{
if (read(fd, &idx, sizeof(struct index_entry))
!= sizeof(struct index_entry))
{
logf("delete_entry(): read error #2");
close(fd);
return false;
}
if (idx.flag & FLAG_DELETED)
continue;
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (tagcache_is_numeric_tag(tag))
continue;
if (idx.tag_seek[tag] == myidx.tag_seek[tag])
in_use[tag]++;
}
}
close(fd);
/* Now delete all tags no longer in use. */
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (tagcache_is_numeric_tag(tag))
continue;
if (in_use[tag])
{
logf("in use: %d/%d", tag, in_use[tag]);
continue;
}
/* Open the index file, which contains the tag names. */
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, tag);
fd = open(buf, O_RDWR);
if (fd < 0)
{
logf("open failed");
return false;
}
/* Skip the header block */
lseek(fd, myidx.tag_seek[tag] + sizeof(struct tagfile_entry), SEEK_SET);
/* Debug, print 10 first characters of the tag
read(fd, buf, 10);
buf[10]='\0';
logf("TAG:%s", buf);
lseek(fd, -10, SEEK_CUR);
*/
/* Write first data byte in tag as \0 */
write(fd, "", 1);
/* Now tag data has been removed */
close(fd);
}
return true;
}
#ifndef __PCTOOL__
/**
* Returns true if there is an event waiting in the queue
* that requires the current operation to be aborted.
*/
static bool check_event_queue(void)
{
struct event ev;
queue_wait_w_tmo(&tagcache_queue, &ev, 0);
switch (ev.id)
{
case Q_STOP_SCAN:
case SYS_POWEROFF:
case SYS_USB_CONNECTED:
/* Put the event back into the queue. */
queue_post(&tagcache_queue, ev.id, ev.data);
return true;
}
return false;
}
#endif
#ifdef HAVE_TC_RAMCACHE
static bool allocate_tagcache(void)
{
struct master_header tcmh;
int fd;
/* Load the header. */
if ( (fd = open_master_fd(&tcmh, false)) < 0)
{
hdr = NULL;
return false;
}
close(fd);
/**
* Now calculate the required cache size plus
* some extra space for alignment fixes.
*/
tc_stat.ramcache_allocated = tcmh.tch.datasize + 128 + TAGCACHE_RESERVE +
sizeof(struct ramcache_header) + TAG_COUNT*sizeof(void *);
hdr = buffer_alloc(tc_stat.ramcache_allocated + 128);
memset(hdr, 0, sizeof(struct ramcache_header));
memcpy(&hdr->h, &tcmh, sizeof(struct master_header));
hdr->indices = (struct index_entry *)(hdr + 1);
logf("tagcache: %d bytes allocated.", tc_stat.ramcache_allocated);
return true;
}
# ifdef HAVE_EEPROM_SETTINGS
static bool tagcache_dumpload(void)
{
struct statefile_header shdr;
int fd, rc;
long offpos;
int i;
fd = open(TAGCACHE_STATEFILE, O_RDONLY);
if (fd < 0)
{
logf("no tagcache statedump");
return false;
}
/* Check the statefile memory placement */
hdr = buffer_alloc(0);
rc = read(fd, &shdr, sizeof(struct statefile_header));
if (rc != sizeof(struct statefile_header)
/* || (long)hdr != (long)shdr.hdr */)
{
logf("incorrect statefile");
hdr = NULL;
close(fd);
return false;
}
offpos = (long)hdr - (long)shdr.hdr;
/* Lets allocate real memory and load it */
hdr = buffer_alloc(shdr.tc_stat.ramcache_allocated);
rc = read(fd, hdr, shdr.tc_stat.ramcache_allocated);
close(fd);
if (rc != shdr.tc_stat.ramcache_allocated)
{
logf("read failure!");
hdr = NULL;
return false;
}
memcpy(&tc_stat, &shdr.tc_stat, sizeof(struct tagcache_stat));
/* Now fix the pointers */
hdr->indices = (struct index_entry *)((long)hdr->indices + offpos);
for (i = 0; i < TAG_COUNT; i++)
hdr->tags[i] += offpos;
return true;
}
static bool tagcache_dumpsave(void)
{
struct statefile_header shdr;
int fd;
if (!tc_stat.ramcache)
return false;
fd = open(TAGCACHE_STATEFILE, O_WRONLY | O_CREAT | O_TRUNC);
if (fd < 0)
{
logf("failed to create a statedump");
return false;
}
/* Create the header */
shdr.hdr = hdr;
memcpy(&shdr.tc_stat, &tc_stat, sizeof(struct tagcache_stat));
write(fd, &shdr, sizeof(struct statefile_header));
/* And dump the data too */
write(fd, hdr, tc_stat.ramcache_allocated);
close(fd);
return true;
}
# endif
static bool load_tagcache(void)
{
struct tagcache_header *tch;
long bytesleft = tc_stat.ramcache_allocated;
struct index_entry *idx;
int rc, fd;
char *p;
int i, tag;
int yield_count = 0;
# ifdef HAVE_DIRCACHE
while (dircache_is_initializing())
sleep(1);
# endif
logf("loading tagcache to ram...");
fd = open(TAGCACHE_FILE_MASTER, O_RDONLY);
if (fd < 0)
{
logf("tagcache open failed");
return false;
}
if (read(fd, &hdr->h, sizeof(struct master_header))
!= sizeof(struct master_header)
|| hdr->h.tch.magic != TAGCACHE_MAGIC)
{
logf("incorrect header");
return false;
}
idx = hdr->indices;
/* Load the master index table. */
for (i = 0; i < hdr->h.tch.entry_count; i++)
{
rc = read(fd, idx, sizeof(struct index_entry));
if (rc != sizeof(struct index_entry))
{
logf("read error #10");
close(fd);
return false;
}
bytesleft -= sizeof(struct index_entry);
if (bytesleft < 0 || ((long)idx - (long)hdr->indices) >= tc_stat.ramcache_allocated)
{
logf("too big tagcache.");
close(fd);
return false;
}
idx++;
}
close(fd);
/* Load the tags. */
p = (char *)idx;
for (tag = 0; tag < TAG_COUNT; tag++)
{
struct tagfile_entry *fe;
char buf[TAG_MAXLEN+32];
if (tagcache_is_numeric_tag(tag))
continue ;
//p = ((void *)p+1);
p = (char *)((long)p & ~0x03) + 0x04;
hdr->tags[tag] = p;
/* Check the header. */
tch = (struct tagcache_header *)p;
p += sizeof(struct tagcache_header);
if ( (fd = open_tag_fd(tch, tag, false)) < 0)
return false;
for (hdr->entry_count[tag] = 0;
hdr->entry_count[tag] < tch->entry_count;
hdr->entry_count[tag]++)
{
long pos;
if (yield_count++ == 100)
{
yield();
/* Abort if we got a critical event in queue */
if (check_event_queue())
return false;
yield_count = 0;
}
fe = (struct tagfile_entry *)p;
pos = lseek(fd, 0, SEEK_CUR);
rc = read(fd, fe, sizeof(struct tagfile_entry));
if (rc != sizeof(struct tagfile_entry))
{
/* End of lookup table. */
logf("read error #11");
close(fd);
return false;
}
/* We have a special handling for the filename tags. */
if (tag == tag_filename)
{
# ifdef HAVE_DIRCACHE
const struct dircache_entry *dc;
# endif
// FIXME: This is wrong!
// idx = &hdr->indices[hdr->entry_count[i]];
idx = &hdr->indices[fe->idx_id];
if (fe->tag_length >= (long)sizeof(buf)-1)
{
read(fd, buf, 10);
buf[10] = '\0';
logf("TAG:%s", buf);
logf("too long filename");
close(fd);
return false;
}
rc = read(fd, buf, fe->tag_length);
if (rc != fe->tag_length)
{
logf("read error #12");
close(fd);
return false;
}
/* Check if the entry has already been removed */
if (idx->flag & FLAG_DELETED)
continue;
/* This flag must not be used yet. */
if (idx->flag & FLAG_DIRCACHE)
{
logf("internal error!");
close(fd);
return false;
}
if (idx->tag_seek[tag] != pos)
{
logf("corrupt data structures!");
close(fd);
return false;
}
# ifdef HAVE_DIRCACHE
if (dircache_is_enabled())
{
dc = dircache_get_entry_ptr(buf);
if (dc == NULL)
{
logf("Entry no longer valid.");
logf("-> %s", buf);
delete_entry(fe->idx_id);
continue ;
}
idx->flag |= FLAG_DIRCACHE;
FLAG_SET_ATTR(idx->flag, fe->idx_id);
idx->tag_seek[tag_filename] = (long)dc;
}
else
# endif
{
# if 0 /* Maybe we could enable this for flash players. Too slow otherwise. */
/* Check if entry has been removed. */
if (global_settings.tagcache_autoupdate)
{
int testfd;
testfd = open(buf, O_RDONLY);
if (testfd < 0)
{
logf("Entry no longer valid.");
logf("-> %s", buf);
delete_entry(fe->idx_id);
continue;
}
close(testfd);
}
# endif
}
continue ;
}
bytesleft -= sizeof(struct tagfile_entry) + fe->tag_length;
if (bytesleft < 0)
{
logf("too big tagcache #2");
logf("tl: %d", fe->tag_length);
logf("bl: %d", bytesleft);
close(fd);
return false;
}
p = fe->tag_data;
rc = read(fd, fe->tag_data, fe->tag_length);
p += rc;
if (rc != fe->tag_length)
{
logf("read error #13");
logf("rc=0x%04x", rc); // 0x431
logf("len=0x%04x", fe->tag_length); // 0x4000
logf("pos=0x%04x", lseek(fd, 0, SEEK_CUR)); // 0x433
logf("tag=0x%02x", tag); // 0x00
close(fd);
return false;
}
}
close(fd);
}
tc_stat.ramcache_used = tc_stat.ramcache_allocated - bytesleft;
logf("tagcache loaded into ram!");
return true;
}
#endif /* HAVE_TC_RAMCACHE */
static bool check_deleted_files(void)
{
int fd, testfd;
char buf[TAG_MAXLEN+32];
struct tagfile_entry tfe;
logf("reverse scan...");
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, tag_filename);
fd = open(buf, O_RDONLY);
if (fd < 0)
{
logf("%s open fail", buf);
return false;
}
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
while (read(fd, &tfe, sizeof(struct tagfile_entry))
== sizeof(struct tagfile_entry)
#ifndef __PCTOOL__
&& !check_event_queue()
#endif
)
{
if (tfe.tag_length >= (long)sizeof(buf)-1)
{
logf("too long tag");
close(fd);
return false;
}
if (read(fd, buf, tfe.tag_length) != tfe.tag_length)
{
logf("read error #14");
close(fd);
return false;
}
/* Now check if the file exists. */
testfd = open(buf, O_RDONLY);
if (testfd < 0)
{
logf("Entry no longer valid.");
logf("-> %s", buf);
delete_entry(tfe.idx_id);
}
close(testfd);
}
close(fd);
logf("done");
return true;
}
static bool check_dir(const char *dirname)
{
DIRCACHED *dir;
int len;
int success = false;
dir = opendir_cached(dirname);
if (!dir)
{
logf("tagcache: opendir_cached() failed");
return false;
}
/* Recursively scan the dir. */
#ifdef __PCTOOL__
while (1)
#else
while (!check_event_queue())
#endif
{
struct dircache_entry *entry;
entry = readdir_cached(dir);
if (entry == NULL)
{
success = true;
break ;
}
if (!strcmp((char *)entry->d_name, ".") ||
!strcmp((char *)entry->d_name, ".."))
continue;
yield();
len = strlen(curpath);
snprintf(&curpath[len], curpath_size - len, "/%s",
entry->d_name);
processed_dir_count++;
if (entry->attribute & ATTR_DIRECTORY)
check_dir(curpath);
else
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
add_tagcache(curpath, dir->internal_entry);
#else
add_tagcache(curpath);
#endif
curpath[len] = '\0';
}
closedir_cached(dir);
return success;
}
void build_tagcache(const char *path)
{
struct tagcache_header header;
bool ret;
curpath[0] = '\0';
data_size = 0;
total_entry_count = 0;
processed_dir_count = 0;
#ifdef HAVE_DIRCACHE
while (dircache_is_initializing())
sleep(1);
#endif
logf("updating tagcache");
cachefd = open(TAGCACHE_FILE_TEMP, O_RDONLY);
if (cachefd >= 0)
{
logf("skipping, cache already waiting for commit");
close(cachefd);
return ;
}
cachefd = open(TAGCACHE_FILE_TEMP, O_RDWR | O_CREAT | O_TRUNC);
if (cachefd < 0)
{
logf("master file open failed: %s", TAGCACHE_FILE_TEMP);
return ;
}
filenametag_fd = open_tag_fd(&header, tag_filename, false);
cpu_boost_id(true, CPUBOOSTID_TAGCACHE);
logf("Scanning files...");
/* Scan for new files. */
memset(&header, 0, sizeof(struct tagcache_header));
write(cachefd, &header, sizeof(struct tagcache_header));
if (strcmp("/", path) != 0)
strcpy(curpath, path);
ret = check_dir(path);
/* Write the header. */
header.magic = TAGCACHE_MAGIC;
header.datasize = data_size;
header.entry_count = total_entry_count;
lseek(cachefd, 0, SEEK_SET);
write(cachefd, &header, sizeof(struct tagcache_header));
close(cachefd);
if (filenametag_fd >= 0)
{
close(filenametag_fd);
filenametag_fd = -1;
}
if (!ret)
{
logf("Aborted.");
cpu_boost_id(false, CPUBOOSTID_TAGCACHE);
return ;
}
/* Commit changes to the database. */
#ifdef __PCTOOL__
allocate_tempbuf();
#endif
if (commit())
{
remove(TAGCACHE_FILE_TEMP);
logf("tagcache built!");
}
#ifdef __PCTOOL__
free_tempbuf();
#endif
#ifdef HAVE_TC_RAMCACHE
if (hdr)
{
/* Import runtime statistics if we just initialized the db. */
if (hdr->h.serial == 0)
queue_post(&tagcache_queue, Q_IMPORT_CHANGELOG, 0);
}
#endif
cpu_boost_id(false, CPUBOOSTID_TAGCACHE);
}
#ifdef HAVE_TC_RAMCACHE
static void load_ramcache(void)
{
if (!hdr)
return ;
cpu_boost_id(true, CPUBOOSTID_TAGCACHE);
/* At first we should load the cache (if exists). */
tc_stat.ramcache = load_tagcache();
if (!tc_stat.ramcache)
{
/* If loading failed, it must indicate some problem with the db
* so disable it entirely to prevent further issues. */
tc_stat.ready = false;
hdr = NULL;
}
cpu_boost_id(false, CPUBOOSTID_TAGCACHE);
}
void tagcache_unload_ramcache(void)
{
tc_stat.ramcache = false;
/* Just to make sure there is no statefile present. */
// remove(TAGCACHE_STATEFILE);
}
#endif
static bool check_all_headers(void)
{
struct master_header myhdr;
struct tagcache_header tch;
int tag;
int fd;
if ( (fd = open_master_fd(&myhdr, false)) < 0)
return false;
close(fd);
current_serial = myhdr.serial;
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (tagcache_is_numeric_tag(tag))
continue;
if ( (fd = open_tag_fd(&tch, tag, false)) < 0)
return false;
close(fd);
}
return true;
}
#ifndef __PCTOOL__
static void tagcache_thread(void)
{
struct event ev;
bool check_done = false;
/* If the previous cache build/update was interrupted, commit
* the changes first in foreground. */
cpu_boost_id(true, CPUBOOSTID_TAGCACHE);
allocate_tempbuf();
commit();
free_tempbuf();
#ifdef HAVE_TC_RAMCACHE
# ifdef HAVE_EEPROM_SETTINGS
if (firmware_settings.initialized && firmware_settings.disk_clean)
check_done = tagcache_dumpload();
remove(TAGCACHE_STATEFILE);
# endif
/* Allocate space for the tagcache if found on disk. */
if (global_settings.tagcache_ram && !tc_stat.ramcache)
allocate_tagcache();
#endif
cpu_boost_id(false, CPUBOOSTID_TAGCACHE);
tc_stat.initialized = true;
/* Don't delay bootup with the header check but do it on background. */
sleep(HZ);
tc_stat.ready = check_all_headers();
while (1)
{
queue_wait_w_tmo(&tagcache_queue, &ev, HZ);
switch (ev.id)
{
case Q_IMPORT_CHANGELOG:
tagcache_import_changelog();
break;
case Q_REBUILD:
remove_files();
build_tagcache("/");
break;
case Q_UPDATE:
build_tagcache("/");
#ifdef HAVE_TC_RAMCACHE
load_ramcache();
#endif
check_deleted_files();
break ;
case Q_START_SCAN:
check_done = false;
case SYS_TIMEOUT:
if (check_done || !tc_stat.ready)
break ;
#ifdef HAVE_TC_RAMCACHE
if (!tc_stat.ramcache && global_settings.tagcache_ram)
{
load_ramcache();
if (tc_stat.ramcache && global_settings.tagcache_autoupdate)
build_tagcache("/");
}
else
#endif
if (global_settings.tagcache_autoupdate)
{
build_tagcache("/");
/* Don't do auto removal without dircache (very slow). */
#ifdef HAVE_DIRCACHE
if (dircache_is_enabled())
check_deleted_files();
#endif
}
logf("tagcache check done");
check_done = true;
break ;
case Q_STOP_SCAN:
break ;
case SYS_POWEROFF:
break ;
#ifndef SIMULATOR
case SYS_USB_CONNECTED:
logf("USB: TagCache");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
usb_wait_for_disconnect(&tagcache_queue);
break ;
#endif
}
}
}
bool tagcache_prepare_shutdown(void)
{
if (tagcache_get_commit_step() > 0)
return false;
tagcache_stop_scan();
while (read_lock || write_lock)
sleep(1);
return true;
}
void tagcache_shutdown(void)
{
#ifdef HAVE_EEPROM_SETTINGS
if (tc_stat.ramcache)
tagcache_dumpsave();
#endif
}
static int get_progress(void)
{
int total_count = -1;
#ifdef HAVE_DIRCACHE
if (dircache_is_enabled())
{
total_count = dircache_get_entry_count();
}
else
#endif
#ifdef HAVE_TC_RAMCACHE
{
if (hdr && tc_stat.ramcache)
total_count = hdr->h.tch.entry_count;
}
#endif
if (total_count < 0)
return -1;
return processed_dir_count * 100 / total_count;
}
struct tagcache_stat* tagcache_get_stat(void)
{
tc_stat.progress = get_progress();
tc_stat.processed_entries = processed_dir_count;
return &tc_stat;
}
void tagcache_start_scan(void)
{
queue_post(&tagcache_queue, Q_START_SCAN, 0);
}
bool tagcache_update(void)
{
if (!tc_stat.ready)
return false;
queue_post(&tagcache_queue, Q_UPDATE, 0);
gui_syncsplash(HZ*2, true, str(LANG_TAGCACHE_FORCE_UPDATE_SPLASH));
return false;
}
bool tagcache_rebuild(void)
{
queue_post(&tagcache_queue, Q_REBUILD, 0);
gui_syncsplash(HZ*2, true, str(LANG_TAGCACHE_FORCE_UPDATE_SPLASH));
return false;
}
void tagcache_stop_scan(void)
{
queue_post(&tagcache_queue, Q_STOP_SCAN, 0);
}
#ifdef HAVE_TC_RAMCACHE
bool tagcache_is_ramcache(void)
{
return tc_stat.ramcache;
}
#endif
#endif /* !__PCTOOL__ */
void tagcache_init(void)
{
memset(&tc_stat, 0, sizeof(struct tagcache_stat));
filenametag_fd = -1;
current_serial = 0;
write_lock = read_lock = 0;
#ifndef __PCTOOL__
queue_init(&tagcache_queue, true);
create_thread(tagcache_thread, tagcache_stack,
sizeof(tagcache_stack), tagcache_thread_name
IF_PRIO(, PRIORITY_BACKGROUND));
#else
tc_stat.initialized = true;
allocate_tempbuf();
commit();
free_tempbuf();
tc_stat.ready = check_all_headers();
#endif
}
bool tagcache_is_initialized(void)
{
return tc_stat.initialized;
}
int tagcache_get_commit_step(void)
{
return tc_stat.commit_step;
}
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