Alg_parameters_ptr Alg_reader::process_attributes(
Alg_parameters_ptr attributes, double time)
{
// print "process_attributes:", attributes
bool ts_flag = false;
if (attributes) {
Alg_parameters_ptr a;
bool in_seconds = seq->get_units_are_seconds();
if (a = Alg_parameters::remove_key(&attributes, "tempor")) {
double tempo = a->parm.r;
seq->insert_tempo(tempo, seq->get_time_map()->time_to_beat(time));
}
if (a = Alg_parameters::remove_key(&attributes, "beatr")) {
double beat = a->parm.r;
seq->insert_beat(time, beat);
}
if (a = Alg_parameters::remove_key(&attributes, "timesig_numr")) {
tsnum = a->parm.r;
ts_flag = true;
}
if (a = Alg_parameters::remove_key(&attributes, "timesig_denr")) {
tsden = a->parm.r;
ts_flag = true;
}
if (ts_flag) {
seq->set_time_sig(seq->get_time_map()->time_to_beat(time),
tsnum, tsden);
}
if (in_seconds) seq->convert_to_seconds();
}
return attributes; // in case it was modified
}
bool Alg_reader::parse()
{
int voice = 0;
int key = 60;
double loud = 100.0;
double pitch = 60.0;
double dur = 1.0;
double time = 0.0;
int track_num = 0;
seq->convert_to_seconds();
//seq->set_real_dur(0.0); // just in case it's not initialized already
readline();
bool valid = false; // ignore blank lines
while (line_parser_flag) {
bool time_flag = false;
bool next_flag = false;
double next;
bool voice_flag = false;
bool loud_flag = false;
bool dur_flag = false;
bool new_pitch_flag = false; // "P" syntax or "A"-"G" syntax
double new_pitch = 0.0;
bool new_key_flag = false; // "K" syntax
int new_key = 0;
Alg_parameters_ptr attributes = NULL;
if (line_parser.peek() == '#') {
// look for #track
line_parser.get_nonspace_quoted(field);
if (streql(field.c_str(), "#track")) {
line_parser.get_nonspace_quoted(field); // number
field.insert(0, " "); // need char at beginning because
// parse_int ignores the first character of the argument
track_num = parse_int(field);
seq->add_track(track_num);
// maybe we have a sequence or track name
line_parser.get_remainder(field);
// if there is a non-space character after #track n then
// use it as sequence or track name. Note that because we
// skip over spaces, a sequence or track name cannot begin
// with leading blanks. Another decision is that the name
// must be at time zero
if (field.length() > 0) {
// insert the field as sequence name or track name
Alg_update_ptr update = new Alg_update;
update->chan = -1;
update->time = 0;
update->set_identifier(-1);
// sequence name is whatever is on track 0
// other tracks have track names
const char *attr =
(track_num == 0 ? "seqnames" : "tracknames");
update->parameter.set_attr(
symbol_table.insert_string(attr));
update->parameter.s = heapify(field.c_str());
seq->add_event(update, track_num);
}
} else if (streql(field.c_str(), "#offset")) {
if (offset_found) {
parse_error(field, 0, "#offset specified twice");
}
offset_found = true;
line_parser.get_nonspace_quoted(field); // number
field.insert(0, " "); // need char at beginning because
// parse_real ignores first character in the argument
offset = parse_real(field);
}
} else {
// we must have a track to insert into
if (seq->tracks() == 0) seq->add_track(0);
line_parser.get_nonspace_quoted(field);
char pk = line_parser.peek();
// attributes are parsed as two adjacent nonspace_quoted tokens
// so we have to conditionally call get_nonspace_quoted() again
if (pk && !isspace(pk)) {
string field2;
line_parser.get_nonspace_quoted(field2);
field.append(field2);
}
while (field[0]) {
char first = toupper(field[0]);
if (strchr("ABCDEFGKLPUSIQHW-", first)) {
valid = true; // it's a note or event
}
if (first == 'V') {
if (voice_flag) {
parse_error(field, 0, "Voice specified twice");
} else {
voice = parse_chan(field);
}
voice_flag = true;
} else if (first == 'T') {
if (time_flag) {
parse_error(field, 0, "Time specified twice");
} else {
time = parse_dur(field, 0.0);
}
time_flag = true;
} else if (first == 'N') {
if (next_flag) {
parse_error(field, 0, "Next specified twice");
} else {
next = parse_dur(field, time);
}
next_flag = true;
} else if (first == 'K') {
if (new_key_flag) {
parse_error(field, 0, "Key specified twice");
} else {
new_key = parse_key(field);
new_key_flag = true;
}
} else if (first == 'L') {
if (loud_flag) {
parse_error(field, 0, "Loudness specified twice");
} else {
loud = parse_loud(field);
}
loud_flag = true;
} else if (first == 'P') {
if (new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
new_pitch = parse_pitch(field);
new_pitch_flag = true;
}
} else if (first == 'U') {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("SIQHW", first)) {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
// prepend 'U' to field, copy EOS too
field.insert((unsigned int) 0, 1, 'U');
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("ABCDEFG", first)) {
if (new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
// prepend 'P' to field
field.insert((unsigned int) 0, 1, 'P');
new_pitch = parse_pitch(field);
new_pitch_flag = true;
}
} else if (first == '-') {
Alg_parameter parm;
if (parse_attribute(field, &parm)) { // enter attribute-value pair
attributes = new Alg_parameters(attributes);
attributes->parm = parm;
parm.s = NULL; // protect string from deletion by destructor
}
} else {
parse_error(field, 0, "Unknown field");
}
if (error_flag) {
field[0] = 0; // exit the loop
} else {
line_parser.get_nonspace_quoted(field);
pk = line_parser.peek();
// attributes are parsed as two adjacent nonspace_quoted
// tokens so we have to conditionally call
// get_nonspace_quoted() again
if (pk && !isspace(pk)) {
string field2;
line_parser.get_nonspace_quoted(field2);
field.append(field2);
}
}
}
// a case analysis:
// Key < 128 implies pitch unless pitch is explicitly given
// Pitch implies Key unless key is explicitly given,
// Pitch is rounded to nearest integer to determine the Key
// if necessary, so MIDI files will lose the pitch fraction
// A-G is a Pitch specification (therefore it implies Key)
// K60 P60 -- both are specified, use 'em
// K60 P60 C4 -- overconstrained, an error
// K60 C4 -- OK, but K60 is already implied by C4
// K60 -- OK, pitch is 60
// C4 P60 -- over constrained
// P60 -- OK, key is 60
// P60.1 -- OK, key is 60
// C4 -- OK, key is 60, pitch is 60
// <nothing> -- OK, key and pitch from before
// K200 P60 -- ok, pitch is 60
// K200 with neither P60 nor C4 uses
// pitch from before
// figure out what the key/instance is:
if (new_key_flag) { // it was directly specified
key = new_key;
} else if (new_pitch_flag) {
// pitch was specified, but key was not; get key from pitch
key = (int) (new_pitch + 0.5); // round to integer key number
}
if (new_pitch_flag) {
pitch = new_pitch;
} else if (key < 128 && new_key_flag) {
// no explicit pitch, but key < 128, so it implies pitch
pitch = key;
new_pitch_flag = true;
}
// now we've acquired new parameters
// if (it is a note, then enter the note
if (valid) {
// change tempo or beat
attributes = process_attributes(attributes, time);
// if there's a duration or pitch, make a note:
if (new_pitch_flag || dur_flag) {
Alg_note_ptr note_ptr = new Alg_note;
note_ptr->chan = voice;
note_ptr->time = time;
note_ptr->dur = dur;
note_ptr->set_identifier(key);
note_ptr->pitch = (float) pitch;
note_ptr->loud = (float) loud;
note_ptr->parameters = attributes;
seq->add_event(note_ptr, track_num); // sort later
if (seq->get_real_dur() < (time + dur)) seq->set_real_dur(time + dur);
} else {
int update_key = -1;
// key must appear explicitly; otherwise
// update applies to channel
if (new_key_flag) {
update_key = key;
}
if (loud_flag) {
Alg_update_ptr new_upd = new Alg_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->set_identifier(update_key);
new_upd->parameter.set_attr(symbol_table.insert_string("loudr"));
new_upd->parameter.r = pitch;
seq->add_event(new_upd, track_num);
if (seq->get_real_dur() < time) seq->set_real_dur(time);
}
if (attributes) {
while (attributes) {
Alg_update_ptr new_upd = new Alg_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->set_identifier(update_key);
new_upd->parameter = attributes->parm;
seq->add_event(new_upd, track_num);
Alg_parameters_ptr p = attributes;
attributes = attributes->next;
p->parm.s = NULL; // so we don't delete the string
delete p;
}
}
}
if (next_flag) {
time = time + next;
} else if (dur_flag || new_pitch_flag) { // a note: incr by dur
time = time + dur;
}
}
}
readline();
}
if (!error_flag) { // why not convert even if there was an error? -RBD
seq->convert_to_seconds(); // make sure format is correct
}
// real_dur is valid, translate to beat_dur
seq->set_beat_dur((seq->get_time_map())->time_to_beat(seq->get_real_dur()));
return error_flag;
}
#include "assert.h"
#include "stdlib.h"
#include "stdio.h"
#include "allegro.h"
#include "string.h"
#include "ctype.h"
//#include "memory.h"
#include "trace.h"
#include "strparse.h"
#ifndef EXPERIMENTAL_NOTE_TRACK
#include "allegrord.h"
#endif /* EXPERIMENTAL_NOTE_TRACK */
#define streql(s1, s2) (strcmp(s1, s2) == 0)
#define field_max 80
//Note that this is an #ifdef, not an #ifndef
#ifdef EXPERIMENTAL_NOTE_TRACK
class Alg_reader {
public:
FILE *file;
int line_no;
String_parse line_parser;
bool line_parser_flag;
char field[field_max];
bool error_flag;
Alg_seq_ptr seq;
double tsnum;
double tsden;
Alg_reader(FILE *a_file, Alg_seq_ptr new_seq);
void readline();
Alg_parameters_ptr process_attributes(Alg_parameters_ptr attributes, double time);
bool parse();
long parse_chan(char *field);
long parse_int(char *field);
int find_real_in(char *field, int n);
double parse_real(char *field);
void parse_error(char *field, long offset, char *message);
double parse_dur(char *field, double base);
double parse_after_dur(double dur, char *field, int n, double base);
double parse_loud(char *field);
long parse_key(char *field);
double parse_pitch(char *field);
long parse_after_key(int key, char *field, int n);
long find_int_in(char *field, int n);
bool parse_attribute(char *field, Alg_parameter_ptr parm);
bool parse_val(Alg_parameter_ptr param, char *s, int i);
bool check_type(char type_char, Alg_parameter_ptr param);
};
#endif /* EXPERIMENTAL_NOTE_TRACK */
void subseq(char *result, char *source, int from, int to)
{
memcpy(result, source + from, to - from);
result[to - from] = 0;
}
#ifndef EXPERIMENTAL_NOTE_TRACK
double Allegro_reader::parse_pitch(char *field)
#else /* EXPERIMENTAL_NOTE_TRACK */
double Alg_reader::parse_pitch(char *field)
#endif /* EXPERIMENTAL_NOTE_TRACK */
{
if (isdigit(field[1])) {
char real_string[80];
int last = find_real_in(field, 1);
subseq(real_string, field, 1, last);
return atof(real_string);
} else {
return (double) parse_key(field);
}
}
#ifndef EXPERIMENTAL_NOTE_TRACK
Allegro_reader::Allegro_reader(FILE *a_file)
{
file = a_file; // save the file
line_parser_flag = false;
line_no = 0;
seq = Seq();
tsnum = 4; // default time signature
tsden = 4;
}
#else /* EXPERIMENTAL_NOTE_TRACK */
// it is the responsibility of the caller to delete
// the seq
Alg_reader::Alg_reader(FILE *a_file, Alg_seq_ptr new_seq)
{
file = a_file; // save the file
line_parser_flag = false;
line_no = 0;
tsnum = 4; // default time signature
tsden = 4;
seq = new_seq;
}
#endif /* EXPERIMENTAL_NOTE_TRACK */
//Note that this is an #ifdef, not an #ifndef
#ifdef EXPERIMENTAL_NOTE_TRACK
Alg_seq_ptr alg_read(FILE *file, Alg_seq_ptr new_seq)
// read a sequence from allegro file
{
if (!new_seq) new_seq = new Alg_seq();
Alg_reader alg_reader(file, new_seq);
alg_reader.parse();
return alg_reader.seq;
}
#endif /* EXPERIMENTAL_NOTE_TRACK */
#ifndef EXPERIMENTAL_NOTE_TRACK
void Allegro_reader::readline()
#else /* EXPERIMENTAL_NOTE_TRACK */
void Alg_reader::readline()
#endif /* EXPERIMENTAL_NOTE_TRACK */
{
char line[256];
char *line_flag = fgets(line, 256, file);
line_parser_flag = false;
if (line_flag) {
line_parser.init(line);
line_parser_flag = true;
error_flag = false;
}
}
#ifndef EXPERIMENTAL_NOTE_TRACK
void Allegro_reader::process_attributes(Parameters_ptr attributes, double time)
{
// print "process_attributes:", attributes
bool ts_flag;
if (attributes) {
Parameters_ptr a;
if (a = Parameters::remove_key(&attributes, "tempor")) {
double tempo = a->parm.r;
seq.insert_tempo(tempo, seq.map.time_to_beat(time));
}
if (a = Parameters::remove_key(&attributes, "beatr")) {
double beat = a->parm.r;
seq.insert_beat(time, beat);
}
if (a = Parameters::remove_key(&attributes, "tsnumr")) {
tsnum = a->parm.r;
ts_flag = true;
}
if (a = Parameters::remove_key(&attributes, "tsdenr")) {
tsden = a->parm.r;
ts_flag = true;
}
if (ts_flag) {
seq.set_time_sig(seq.map.time_to_beat(time), tsnum, tsden);
}
}
}
#else /* EXPERIMENTAL_NOTE_TRACK */
Alg_parameters_ptr Alg_reader::process_attributes(
Alg_parameters_ptr attributes, double time)
{
// print "process_attributes:", attributes
bool ts_flag = false;
if (attributes) {
Alg_parameters_ptr a;
bool in_seconds = seq->get_units_are_seconds();
if (a = Alg_parameters::remove_key(&attributes, "tempor")) {
double tempo = a->parm.r;
seq->insert_tempo(tempo, seq->get_time_map()->time_to_beat(time));
}
if (a = Alg_parameters::remove_key(&attributes, "beatr")) {
double beat = a->parm.r;
seq->insert_beat(time, beat);
}
if (a = Alg_parameters::remove_key(&attributes, "timesig_numr")) {
tsnum = a->parm.r;
ts_flag = true;
}
if (a = Alg_parameters::remove_key(&attributes, "timesig_denr")) {
tsden = a->parm.r;
ts_flag = true;
}
if (ts_flag) {
seq->set_time_sig(seq->get_time_map()->time_to_beat(time),
tsnum, tsden);
}
if (in_seconds) seq->convert_to_seconds();
}
return attributes; // in case it was modified
}
#endif /* EXPERIMENTAL_NOTE_TRACK */
#ifndef EXPERIMENTAL_NOTE_TRACK
bool Allegro_reader::parse()
{
int voice = 0;
int key = 60;
double loud = 100.0;
double pitch = 60.0;
double dur = 1.0;
double time = 0.0;
readline();
bool valid = false; // ignore blank lines
while (line_parser_flag) {
bool time_flag = false;
bool next_flag = false;
double next;
bool voice_flag = false;
bool loud_flag = false;
bool dur_flag = false;
bool new_pitch_flag = false; // "P" syntax
double new_pitch = 0.0;
bool new_key_flag = false; // "K" syntax
int new_key = 0;
bool new_note_flag = false; // "A"-"G" syntax
int new_note = 0;
Parameters_ptr attributes = NULL;
line_parser.get_nonspace_quoted(field);
char pk = line_parser.peek();
if (pk && !isspace(pk)) {
line_parser.get_nonspace_quoted(field + strlen(field));
}
while (field[0]) {
// print "field", "|";field;"|", "|";line_parser.string;"|", line_parser.pos
char first = toupper(field[0]);
if (strchr("ABCDEFGKLPUSIQHW-", first)) {
valid = true; // it's a note or event
}
if (first == 'V') {
if (voice_flag) {
parse_error(field, 0, "Voice specified twice");
} else {
voice = parse_int(field);
}
voice_flag = true;
} else if (first == 'T') {
if (time_flag) {
parse_error(field, 0, "Time specified twice");
} else {
time = parse_dur(field, 0.0);
}
time_flag = true;
} else if (first == 'N') {
if (next_flag) {
parse_error(field, 0, "Next specified twice");
} else {
next = parse_dur(field, time);
}
next_flag = true;
} else if (first == 'K') {
if (new_key_flag) {
parse_error(field, 0, "Key specified twice");
} else {
new_key = parse_key(field);
new_key_flag = true;
}
} else if (first == 'L') {
if (loud_flag) {
parse_error(field, 0, "Loudness specified twice");
} else {
loud = parse_loud(field);
}
loud_flag = true;
} else if (first == 'P') {
if (new_note_flag || new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
new_pitch = parse_pitch(field);
new_pitch_flag = true;
}
} else if (first == 'U') {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("SIQHW", first)) {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
// prepend 'U' to field, copy EOS too
memmove(field + 1, field, strlen(field) + 1);
field[0] = 'U';
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("ABCDEFG", first)) {
if (new_note_flag || new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
// prepend 'K' to field, copy EOS too
memmove(field + 1, field, strlen(field) + 1);
field[0] = 'K';
new_note = parse_key(field);
new_note_flag = true;
}
} else if (first == '-') {
Parameter parm;
if (parse_attribute(field, &parm)) { // enter attribute-value pair
attributes = new Parameters(attributes);
attributes->parm = parm;
parm.s = NULL; // protect string from deletion by destructor
}
} else {
parse_error(field, 0, "Unknown field");
}
if (error_flag) {
field[0] = 0; // exit the loop
} else {
line_parser.get_nonspace_quoted(field);
pk = line_parser.peek();
if (pk && !isspace(pk)) {
line_parser.get_nonspace_quoted(field + strlen(field));
}
}
}
// a case analysis:
// Key < 128 counts as both key and pitch
// A-G implies pitch AND key unless key given too
// K60 P60 -- both are specified, use 'em
// K60 P60 C4 -- overconstrained, an error
// K60 C4 -- overconstrained
// K60 -- OK, pitch is 60
// C4 P60 -- over constrained
// P60 -- OK, key is from before, pitch is 60
// C4 -- OK, key is 60, pitch is 60
// <nothing> -- OK, key and pitch from before
// K200 with P60 ok, pitch is 60
// K200 with neither P60 nor C4 uses
// pitch from before
// figure out what the key/instance is:
if (new_key_flag) { // it was directly specified
key = new_key;
if (key < 128 && new_note_flag) {
parse_error("", 0, "Pitch specified twice");
}
} else if (new_note_flag) { // "A"-"G" used
key = new_note;
}
if (new_pitch_flag) {
pitch = new_pitch;
} else if (key < 128) {
pitch = key;
}
// now we've acquired new parameters
// if (it is a note, then enter the note
if (valid) {
// change tempo or beat
process_attributes(attributes, time);
// if there's a duration or pitch, make a note:
if (new_pitch_flag || dur_flag || new_note_flag) {
new_key_flag = false;
new_pitch_flag = false;
Allegro_note_ptr note_ptr = new Allegro_note;
note_ptr->chan = voice;
note_ptr->time = time;
note_ptr->dur = dur;
note_ptr->key = key;
note_ptr->pitch = pitch;
note_ptr->loud = loud;
note_ptr->parameters = attributes;
seq.add_event(note_ptr); // sort later
} else {
int update_key = -1;
// key or pitch must appear explicitly; otherwise
// update applies to channel
if (new_key_flag || new_pitch_flag) {
update_key = key;
}
if (loud_flag) {
Allegro_update_ptr new_upd = new Allegro_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->key = update_key;
new_upd->parameter.set_attr(symbol_table.insert_string("loudr"));
new_upd->parameter.r = pitch;
seq.add_event(new_upd);
}
if (attributes) {
while (attributes) {
Allegro_update_ptr new_upd = new Allegro_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->key = update_key;
new_upd->parameter = attributes->parm;
seq.add_event(new_upd);
Parameters_ptr p = attributes;
attributes = attributes->next;
delete p;
}
}
}
if (next_flag) {
time = time + next;
} else if (dur_flag) {
time = time + dur;
}
}
readline();
}
//print "Finished reading score"
if (!error_flag) {
seq.convert_to_seconds(); // make sure format is correct
// seq.notes.sort('event_greater_than');
}
// print "parse returns error_flag", error_flag
return error_flag;
}
#else /* EXPERIMENTAL_NOTE_TRACK */
bool Alg_reader::parse()
{
int voice = 0;
int key = 60;
double loud = 100.0;
double pitch = 60.0;
double dur = 1.0;
double time = 0.0;
int track_num = 0;
seq->convert_to_seconds();
//seq->set_real_dur(0.0); // just in case it's not initialized already
readline();
bool valid = false; // ignore blank lines
while (line_parser_flag) {
bool time_flag = false;
bool next_flag = false;
double next;
bool voice_flag = false;
bool loud_flag = false;
bool dur_flag = false;
bool new_pitch_flag = false; // "P" syntax
double new_pitch = 0.0;
bool new_key_flag = false; // "K" syntax
int new_key = 0;
bool new_note_flag = false; // "A"-"G" syntax
int new_note = 0;
Alg_parameters_ptr attributes = NULL;
if (line_parser.peek() == '#') {
// look for #track
line_parser.get_nonspace_quoted(field);
if (streql(field, "#track")) {
line_parser.get_nonspace_quoted(field); // number
track_num = parse_int(field - 1);
seq->add_track(track_num);
}
// maybe we have a comment
} else {
// we must have a track to insert into
if (seq->tracks() == 0) seq->add_track(0);
line_parser.get_nonspace_quoted(field);
char pk = line_parser.peek();
// attributes are parsed as two adjacent nonspace_quoted tokens
// so we have to conditionally call get_nonspace_quoted() again
if (pk && !isspace(pk)) {
line_parser.get_nonspace_quoted(field + strlen(field));
}
while (field[0]) {
char first = toupper(field[0]);
if (strchr("ABCDEFGKLPUSIQHW-", first)) {
valid = true; // it's a note or event
}
if (first == 'V') {
if (voice_flag) {
parse_error(field, 0, "Voice specified twice");
} else {
voice = parse_chan(field);
}
voice_flag = true;
} else if (first == 'T') {
if (time_flag) {
parse_error(field, 0, "Time specified twice");
} else {
time = parse_dur(field, 0.0);
}
time_flag = true;
} else if (first == 'N') {
if (next_flag) {
parse_error(field, 0, "Next specified twice");
} else {
next = parse_dur(field, time);
}
next_flag = true;
} else if (first == 'K') {
if (new_key_flag) {
parse_error(field, 0, "Key specified twice");
} else {
new_key = parse_key(field);
new_key_flag = true;
}
} else if (first == 'L') {
if (loud_flag) {
parse_error(field, 0, "Loudness specified twice");
} else {
loud = parse_loud(field);
}
loud_flag = true;
} else if (first == 'P') {
if (new_note_flag || new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
new_pitch = parse_pitch(field);
new_pitch_flag = true;
}
} else if (first == 'U') {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("SIQHW", first)) {
if (dur_flag) {
parse_error(field, 0, "Dur specified twice");
} else {
// prepend 'U' to field, copy EOS too
memmove(field + 1, field, strlen(field) + 1);
field[0] = 'U';
dur = parse_dur(field, time);
dur_flag = true;
}
} else if (strchr("ABCDEFG", first)) {
if (new_note_flag || new_pitch_flag) {
parse_error(field, 0, "Pitch specified twice");
} else {
// prepend 'K' to field, copy EOS too
memmove(field + 1, field, strlen(field) + 1);
field[0] = 'K';
new_note = parse_key(field);
new_note_flag = true;
}
} else if (first == '-') {
Alg_parameter parm;
if (parse_attribute(field, &parm)) { // enter attribute-value pair
attributes = new Alg_parameters(attributes);
attributes->parm = parm;
parm.s = NULL; // protect string from deletion by destructor
}
} else {
parse_error(field, 0, "Unknown field");
}
if (error_flag) {
field[0] = 0; // exit the loop
} else {
line_parser.get_nonspace_quoted(field);
pk = line_parser.peek();
// attributes are parsed as two adjacent nonspace_quoted
// tokens so we have to conditionally call
// get_nonspace_quoted() again
if (pk && !isspace(pk)) {
line_parser.get_nonspace_quoted(field + strlen(field));
}
}
}
// a case analysis:
// Key < 128 counts as both key and pitch
// A-G implies pitch AND key unless key given too
// K60 P60 -- both are specified, use 'em
// K60 P60 C4 -- overconstrained, an error
// K60 C4 -- overconstrained
// K60 -- OK, pitch is 60
// C4 P60 -- over constrained
// P60 -- OK, key is from before, pitch is 60
// C4 -- OK, key is 60, pitch is 60
// <nothing> -- OK, key and pitch from before
// K200 with P60 ok, pitch is 60
// K200 with neither P60 nor C4 uses
// pitch from before
// figure out what the key/instance is:
if (new_key_flag) { // it was directly specified
key = new_key;
if (key < 128 && new_note_flag) {
parse_error("", 0, "Pitch specified twice");
}
} else if (new_note_flag) { // "A"-"G" used
key = new_note;
}
if (new_pitch_flag) {
pitch = new_pitch;
} else if (key < 128) {
pitch = key;
}
// now we've acquired new parameters
// if (it is a note, then enter the note
if (valid) {
// change tempo or beat
attributes = process_attributes(attributes, time);
// if there's a duration or pitch, make a note:
if (new_pitch_flag || dur_flag || new_note_flag) {
new_key_flag = false;
new_pitch_flag = false;
Alg_note_ptr note_ptr = new Alg_note;
note_ptr->chan = voice;
note_ptr->time = time;
note_ptr->dur = dur;
note_ptr->set_identifier(key);
note_ptr->pitch = pitch;
note_ptr->loud = loud;
note_ptr->parameters = attributes;
seq->add_event(note_ptr, track_num); // sort later
if (seq->get_real_dur() < (time + dur)) seq->set_real_dur(time + dur);
} else {
int update_key = -1;
// key or pitch must appear explicitly; otherwise
// update applies to channel
if (new_key_flag || new_pitch_flag) {
update_key = key;
}
if (loud_flag) {
Alg_update_ptr new_upd = new Alg_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->set_identifier(update_key);
new_upd->parameter.set_attr(symbol_table.insert_string("loudr"));
new_upd->parameter.r = pitch;
seq->add_event(new_upd, track_num);
if (seq->get_real_dur() < time) seq->set_real_dur(time);
}
if (attributes) {
while (attributes) {
Alg_update_ptr new_upd = new Alg_update;
new_upd->chan = voice;
new_upd->time = time;
new_upd->set_identifier(update_key);
new_upd->parameter = attributes->parm;
seq->add_event(new_upd, track_num);
Alg_parameters_ptr p = attributes;
attributes = attributes->next;
p->parm.s = NULL; // so we don't delete the string
delete p;
}
}
}
if (next_flag) {
time = time + next;
} else if (dur_flag) {
time = time + dur;
}
}
}
readline();
}
//print "Finished reading score"
if (!error_flag) {
seq->convert_to_seconds(); // make sure format is correct
// seq->notes.sort('event_greater_than');
}
// real_dur is valid, translate to beat_dur
seq->set_beat_dur((seq->get_time_map())->time_to_beat(seq->get_real_dur()));
// print "parse returns error_flag", error_flag
return error_flag;
}