int eof_undo_load_state(const char * fn)
{
EOF_SONG * sp = NULL;
PACKFILE * fp = NULL, * rfp = NULL;
char rheader[16] = {0};
int old_eof_silence_loaded = eof_silence_loaded; //Retain this value, since it is destroyed by eof_destroy_song()
char eof_recover_path[50];
eof_log("eof_undo_load_state() entered", 1);
if(fn == NULL)
{
return 0;
}
fp = pack_fopen(fn, "r");
if(!fp)
{
return 0;
}
if(pack_fread(rheader, 16, fp) != 16)
{
return 0; //Return error if 16 bytes cannot be read
}
sp = eof_create_song(); //Initialize an empty chart
if(sp == NULL)
{
return 0;
}
sp->tags->accurate_ts = 0; //For existing projects, this setting must be manually enabled in order to prevent unwanted alteration to beat timings
(void) snprintf(eof_recover_path, sizeof(eof_recover_path) - 1, "%seof.recover", eof_temp_path);
rfp = pack_fopen(eof_recover_path, "r"); //Open the recovery file to prevent eof_destroy_song() from deleting it
if(!eof_load_song_pf(sp, fp))
{ //If loading the undo state fails
allegro_message("Failed to perform undo");
(void) pack_fclose(rfp); //Close this recovery file handle so that it will be deleted by the following call to eof_destroy_song()
eof_destroy_song(sp);
return 0; //Return failure
}
if(eof_song)
{
eof_destroy_song(eof_song); //Destroy the chart that is open
}
(void) pack_fclose(rfp);
eof_song = sp; //Replacing it with the loaded undo state
eof_silence_loaded = old_eof_silence_loaded; //Restore the status of whether chart audio is loaded
(void) pack_fclose(fp);
return 1;
}
int eof_undo_load_state(const char * fn)
{
EOF_SONG * sp = NULL;
PACKFILE * fp = NULL;
char rheader[16] = {0};
int old_eof_silence_loaded = eof_silence_loaded; //Retain this value, since it is destroyed by eof_destroy_song()
eof_log("eof_undo_load_state() entered", 1);
if(fn == NULL)
{
return 0;
}
fp = pack_fopen(fn, "r");
if(!fp)
{
return 0;
}
if(pack_fread(rheader, 16, fp) != 16)
{
return 0; //Return error if 16 bytes cannot be read
}
sp = eof_create_song(); //Initialize an empty chart
if(sp == NULL)
{
return 0;
}
if(!eof_load_song_pf(sp, fp))
{ //If loading the undo state fails
allegro_message("Failed to perform undo");
eof_destroy_song(sp);
return 0; //Return failure
}
if(eof_song)
{
eof_destroy_song(eof_song); //Destroy the chart that is open
}
eof_song = sp; //Replacing it with the loaded undo state
eof_silence_loaded = old_eof_silence_loaded; //Restore the status of whether chart audio is loaded
(void) pack_fclose(fp);
return 1;
}
int eof_undo_load_state(const char * fn)
{
EOF_SONG * sp = NULL;
PACKFILE * fp = NULL, * rfp = NULL;
char rheader[16] = {0};
int old_eof_silence_loaded = eof_silence_loaded; //Retain this value, since it is destroyed by eof_destroy_song()
char eof_recover_path[50];
eof_log("eof_undo_load_state() entered", 1);
if(fn == NULL)
{
return 0;
}
fp = pack_fopen(fn, "r");
if(!fp)
{
return 0;
}
if(pack_fread(rheader, 16, fp) != 16)
{
(void) pack_fclose(fp);
return 0; //Return error if 16 bytes cannot be read
}
sp = eof_create_song(); //Initialize an empty chart
if(sp == NULL)
{
(void) pack_fclose(fp);
return 0;
}
sp->tags->accurate_ts = 0; //For existing projects, this setting must be manually enabled in order to prevent unwanted alteration to beat timings
(void) snprintf(eof_recover_path, sizeof(eof_recover_path) - 1, "%seof.recover", eof_temp_path_s);
rfp = pack_fopen(eof_recover_path, "r"); //Open the recovery file to prevent eof_destroy_song() from deleting it
if(!eof_load_song_pf(sp, fp))
{ //If loading the undo state fails
allegro_message("Failed to perform undo");
(void) pack_fclose(rfp); //Close this recovery file handle so that it will be deleted by the following call to eof_destroy_song()
eof_destroy_song(sp);
(void) pack_fclose(fp);
return 0; //Return failure
}
(void) pack_fclose(fp);
if(EOF_TRACK_PRO_GUITAR_B >= sp->tracks)
{ //If the chart loaded does not contain a bonus pro guitar track (a pre 1.8RC12 chart or a post 1.8RC12 chart with an empty bonus track during save)
if(eof_song_add_track(sp, &eof_default_tracks[EOF_TRACK_PRO_GUITAR_B]) == 0) //Add a blank bonus pro guitar track
{ //If the track failed to be added
allegro_message("Failed to perform undo");
(void) pack_fclose(rfp); //Close this recovery file handle so that it will be deleted by the following call to eof_destroy_song()
eof_destroy_song(sp);
return 0; //Return failure
}
}
if(eof_song)
{
eof_undo_in_progress = 1; //Signal to eof_destroy_song() that the waveform and spectrogram are not to be destroyed along with the active project structure
eof_destroy_song(eof_song); //Destroy the chart that is open
eof_undo_in_progress = 0;
}
(void) pack_fclose(rfp); //Calls to eof_destroy_song() are finished, the recovery file handle can be released now
eof_song = sp; //Replacing it with the loaded undo state
eof_silence_loaded = old_eof_silence_loaded; //Restore the status of whether chart audio is loaded
return 1;
}
