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[Bug Fix] bookmark.c failure to compare existing tracks and playlist

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the underlying global buffer fo bookmark is overwritten by the read function so
instead make a hash of the playlist and track names

might needa better hash but hopefully CRC32 is sufficient

Change-Id: Ie25dbb62e664b804e4f858d9e0cc248fdc8c9895
This commit is contained in:
William Wilgus 2022-12-08 17:49:52 -05:00 committed by William Wilgus
parent 3555e84a7a
commit 7a00ad72e4
1 changed files with 43 additions and 28 deletions
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71
apps/bookmark.c
View file

@ -86,6 +86,11 @@ struct resume_info{
#define TEMP_BUF_SIZE (MAX(MAX_BOOKMARK_SIZE, MAX_PATH + 1))
static char global_temp_buffer[TEMP_BUF_SIZE];
static inline void get_hash(const char *key, uint32_t *hash, int len)
{
*hash = crc_32(key, len, *hash); /* this is probably sufficient */
}
static const char* skip_tokens(const char* s, int ntokens)
{
for (int i = 0; i < ntokens; i++)
@ -120,17 +125,33 @@ static long long_token(const char **s)
/* Get the name of the playlist and the name of the track from a bookmark. */
/* Returns true iff both were extracted. */
/*-------------------------------------------------------------------------*/
static bool bookmark_get_playlist_and_track(const char *bookmark,
const char **pl_start,
const char **pl_end,
const char **track)
static bool bookmark_get_playlist_and_track_hash(const char *bookmark,
uint32_t *pl_hash,
uint32_t *track_hash)
{
*pl_hash = 0;
*track_hash = 0;
int pl_len;
const char *pl_start, *pl_end, *track;
logf("%s", __func__);
*pl_start = strchr(bookmark,'/');
if (!(*pl_start))
pl_start = strchr(bookmark,'/');
if (!(pl_start))
return false;
*pl_end = skip_tokens(*pl_start, 1) - 1;
*track = *pl_end + 1;
pl_end = skip_tokens(pl_start, 1) - 1;
pl_len = pl_end - pl_start;
track = pl_end + 1;
get_hash(pl_start, pl_hash, pl_len);
if (global_settings.usemrb == BOOKMARK_ONE_PER_TRACK)
{
get_hash(track, track_hash, strlen(track));
}
return true;
}
@ -262,13 +283,11 @@ static bool add_bookmark(const char* bookmark_file_name,
int temp_bookmark_file = 0;
int bookmark_file = 0;
int bookmark_count = 0;
int pl_len = 0, bm_pl_len;
const char *pl_start = NULL, *bm_pl_start;
const char *pl_end = NULL, *bm_pl_end;
const char *track = NULL, *bm_track;
bool comp_playlist = false;
bool comp_track = false;
bool equal;
uint32_t pl_hash, pl_track_hash;
uint32_t bm_pl_hash, bm_pl_track_hash;
/* Opening up a temp bookmark file */
temp_bookmark_file = open_temp_bookmark(fnamebuf,
@ -282,20 +301,22 @@ static bool add_bookmark(const char* bookmark_file_name,
if (most_recent && ((global_settings.usemrb == BOOKMARK_ONE_PER_PLAYLIST)
|| (global_settings.usemrb == BOOKMARK_ONE_PER_TRACK)))
{
if (bookmark_get_playlist_and_track(bookmark, &pl_start, &pl_end, &track))
if (bookmark_get_playlist_and_track_hash(bookmark, &pl_hash, &pl_track_hash))
{
comp_playlist = true;
pl_len = pl_end - pl_start;
if (global_settings.usemrb == BOOKMARK_ONE_PER_TRACK)
comp_track = true;
comp_track = (global_settings.usemrb == BOOKMARK_ONE_PER_TRACK);
}
}
logf("adding bookmark to %s [%s]", fnamebuf, bookmark);
/* Writing the new bookmark to the begining of the temp file */
write(temp_bookmark_file, bookmark, strlen(bookmark));
write(temp_bookmark_file, "\n", 1);
bookmark_count++;
/* WARNING underlying buffer to *bookmrk gets overwritten after this point! */
/* Reading in the previous bookmarks and writing them to the temp file */
logf("opening old bookmark %s", bookmark_file_name);
bookmark_file = open(bookmark_file_name, O_RDONLY);
@ -315,15 +336,14 @@ static bool add_bookmark(const char* bookmark_file_name,
equal = false;
if (comp_playlist)
{
if (bookmark_get_playlist_and_track(global_temp_buffer,
&bm_pl_start, &bm_pl_end, &bm_track))
if (bookmark_get_playlist_and_track_hash(global_temp_buffer,
&bm_pl_hash, &bm_pl_track_hash))
{
bm_pl_len = bm_pl_end - bm_pl_start;
equal = (pl_len == bm_pl_len) &&
!strncmp(pl_start, bm_pl_start, pl_len);
equal = (pl_hash == bm_pl_hash);
if (equal && comp_track)
equal = !strcmp(track, bm_track);
{
equal = (pl_track_hash == bm_pl_track_hash);
}
}
}
if (!equal)
@ -339,11 +359,6 @@ static bool add_bookmark(const char* bookmark_file_name,
}
close(temp_bookmark_file);
/* only retrieve the path*/
open_temp_bookmark(fnamebuf,
sizeof(fnamebuf),
O_PATH,
bookmark_file_name);
remove(bookmark_file_name);
rename(fnamebuf, bookmark_file_name);