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|
/****************************************************************************
seqread.c -- Phase 1 of adagio compilation...
this module parses adagio programs and builds a linked list structure
consisting of notes and control changes in time order.
Copyright 1989 Carnegie Mellon University
*****************************************************************************/
/*****************************************************************************
* Change Log
* Date | Change
*-----------+-----------------------------------------------------------------
* 31-Dec-85 | Created changelog
* 31-Dec-85 | Add c:\ to include directives
* 31-Dec-85 | Added standard command scanner, metronome variable, need to add
* | cmdline_help procedure
* 31-Dec-85 | Call intr_init
* 31-Dec-85 | Set musictrace from command line via -trace
* 31-Dec-85 | Added -poll
* 1-Jan-86 | Put error messages out to stderr
* 1-Jan-86 | Set IsAT. Can be later overridden by -at and -xt switches,
* | currently only used for diagnostics (may be needed for
* | compatibles, who knows? In which case remove the tests which
* | confirm the type of processor)
* 1-Jan-86 | <rgd/jmn> Removed dur-adjusted message
* 1-Jan-86 | Added miditrace
* 18-Jan-86 | Shortened durations by 1/200 s to avoid roundoff problems --
* | see buildnote for details.
* 3-Mar-86 | Allow octave and accidentals in either order after pitch name.
* | Default octave is now one that gets nearest previous pitch,
* | the tritone (half an octave) interval is descending by default.
* | Special commands handled by table search, !Rate command added
* | to scale all times by a percentage (50 = half speed).
* 9-Mar-86 | Use space to limit amount of storage allocation. Otherwise
* | exhausting storage in phase1 caused phase2 to fail.
* 12-Mar-86 | Broke off command line parser into adagio.c, only parser remains
* 24-Mar-86 | Changed representation from note_struct to event_struct
* | Parse M, N, O, X, and Y as control change commands
* 23-May-86 | Added , and ; syntax: "," means "N0\n", ";" means "\n"
* 16-Jul-86 | modify to only call toupper/lower with upper/lower case as
* | parameter to be compatible with standard C functions
* 7-Aug-86 | fixed bug with default pitches and rests
* 5-Jul-87 | F.H: Introduced new memory handling from Mac version.
* | Changed: init()
* | ins_event()
* | ins_ctrl()
* | ins_note()
* | Deleted: reverse()
* | nalloc()
* | Introduced: event_alloc()
* | phase1_FreeMem()
* | system.h & system.c dependencies
* 10-Feb-88 | fixed parseend to accept blanks and tabs,
* | fixed rate scaling of durations
* 11-Jun-88 | commented out gprintf of \n to ERROR after parsing finished.
* 13-Oct-88 | JCD : exclusive AMIGA version.
* 13-Apr-89 | JCD : New portable version.
* 31-Jan-90 | GWL : Cleaned up for LATTICE
* 30-Jun-90 | RBD : further changes
* 2-Apr-91 | JDW : further changes
* 30-Jun-91 | RBD : parse '+' and '/' in durations, * after space is comment
* 28-Apr-03 | DM : changes for portability
*****************************************************************************/
#include "switches.h"
#include <stdio.h>
#include <string.h>
#include "cext.h"
#include "cmdline.h"
#include "midifns.h" /* to get time_type */
#include "timebase.h"
#include "moxc.h" /* to get debug declared */
#include "seq.h"
#include "seqread.h"
#include "userio.h"
/* ctype.h used to be included only by UNIX and AMIGA,
surely everyone wants this? */
#include "ctype.h"
#ifndef toupper
/* we're already taking precautions, so inline version of toupper is ok: */
#define toupper(c) ((c)-'a'+'A')
/* CAUTION: AZTEC V5.0 defines an inline version of toupper called _toupper,
but they got it wrong!
*/
#endif
/* cmtcmd.h references amiga message ports */
#ifdef AMIGA
#ifdef LATTICE
#include "amiga.h"
#endif
#include "exec/exec.h"
#endif
#include "cmtcmd.h"
/* public stuff */
extern long space; /* remaining free bytes */
extern int abort_flag;
/****************************************************************************
The following are used to simulate fixed point with the radix point
8 bits from the right:
****************************************************************************/
#define precise(x) (((time_type) x) << 8)
#define seqround(x) ((((time_type) x) + 128) >> 8)
#define trunc(x) (((time_type) x) >> 8)
#define nullstring(s) (s[0] == EOS)
/****************************************************************************
* Routines local to this module:
****************************************************************************/
private void do_a_rest();
private time_type doabsdur();
private int doabspitch();
private void doclock();
private void docomment();
private void doctrl();
private void dodef();
private time_type dodur();
private void doerror();
private int doloud();
void domacro();
private void donextdur();
private int dopitch();
private void doprogram();
private void dorate();
private void doset();
private void dospecial();
private time_type dosymdur();
private void dotempo();
private void dotime();
private void dovoice();
private void fferror();
private void init();
private int issymbol();
private void marker();
private void parseend();
private void parsefield();
private boolean parsenote();
private boolean parseparm();
private int scan();
private int scan1();
private long scanint();
private void scansymb();
private long scansgnint();
/****************************************************************************
* data structures for parser lookup tables
****************************************************************************/
struct durt { /* duration translation table */
char symbol;
time_type value;
};
#define durtable_len 7
struct durt durtable[durtable_len] = {
{'W', 4800L},
{'H', 2400L},
{'Q', 1200L},
{'I', 600L},
{'S', 300L},
{'%', 150L},
{'^', 75L}
};
struct loudt { /* loudness translation table */
char symbol[4];
int value;
};
struct loudt loudtable[] = {
{"PPP", 20},
{"PP\0", 26},
{"P\0\0", 34},
{"MP\0", 44},
{"MF\0", 58},
{"F\0\0", 75},
{"FF\0", 98},
{"FFF", 127}
};
char too_many_error[] = "Too many parameters";
private char *ssymbols[] = {"TEMPO", "RATE", "CSEC", "MSEC",
"SETI", "SETV", "CALL", "RAMP",
"CLOCK", "DEF", "END"};
#define sym_tempo 0
#define sym_rate 1
#define sym_csec 2
#define sym_msec 3
#define sym_seti 4
#define sym_setv 5
#define sym_call 6
#define sym_ramp 7
#define sym_clock 8
#define sym_def 9
#define sym_end 10
/* number of symbols */
#define sym_n 11
#define linesize 100
private char line[linesize]; /* the input line */
private char token[linesize]; /* a token scanned from the input line */
private boolean pitch_flag; /* set when a pitch is indicated */
/* (if controls changes are given, only allocate a note event if
* a pitch was specified -- i.e. when pitch_flag is set)
*/
private boolean rest_flag; /* set when a rest (R) is found */
/* this flag is NOT inherited by the next line */
private boolean symbolic_dur_flag;
/* TRUE if last dur was not absolute
* (if this is set, then the default duration is changed
* accordingly when the tempo is changed.)
*/
#define nctrl 8
private boolean ctrlflag[nctrl];
/* TRUE if control change was present
* ctrlflag[0] TRUE if ANY control change
* was present
*/
private int ctrlval[nctrl];
/* the new value of the control */
#define nmacroctrl 10
short macctrlx; /* index into the following: */
short macctrlnum[nmacroctrl]; /* macro ctrl number, e.g. for ~4(67), or
* number of parameters for a symbolic macro */
short macctrlparmx[nmacroctrl]; /* ctrl value for ctrl change, or index of
* parameters for symbolic macro */
short macctrlparms[nmacroctrl*nmacroparms]; /* parameters for symbolic macros */
short macctrlnextparm;
def_type macctrldef[nmacroctrl]; /* definition for symbolic macro */
private time_type time_scale; /* 1000 if centisec, 100 if millisec */
/* note: user_specified_time * (time_scale / rate) = millisec */
/****************************************************************************
*
* variables private to this module
*
****************************************************************************/
private boolean end_flag = FALSE; /* set "true" when "!END" is seen */
/****************************************************************************
* state variables
* Because each line of an Adagio score inherits properties from the previous
* line, it makes sense to implement the parser as a collection of routines
* that make small changes to some global state. For example, pitch is a
* global variable. When the field G4 is encountered, the dopitch routine
* assigns the pitch number for G4 to the variable pitch. After all fields
* are processed, these variables describe the current note and contain the
* default parameters for the next note as well.
*
* Global variables that are used in this way by the parsing rountines are:
****************************************************************************/
private int
linex, /* index of the next character to be scanned */
lineno, /* current line number */
fieldx, /* index of the current character within a field */
pitch, /* pitch of note */
loud, /* loudness of note */
voice, /* voice (midi channel) of note */
artic; /* articulation (a percentage of duration) */
private boolean ndurp; /* set when a next (N) is indicated */
/* (next time defaults to the current time plus duration unless
* overridden by a next (N) command whose presence is signalled
* by ndurp.)
*/
private time_type
thetime, /* the starting time of the note */
rate, /* time rate -- scales time and duration, default = 100 */
ntime, /* the starting time of the next note */
dur, /* the duration of the note */
tempo, /* the current tempo */
start, /* the reference time (time of last !tempo or !rate cmd) */
ticksize; /* set by !clock command, zero for no clock */
private int pitchtable[7] = {
69, 71, 60, 62, 64, 65, 67 };
extern char score_na[name_length];
private seq_type the_score; /* this is the score we are parsing */
/* def_append -- append a byte to the current definition */
/*
* The def data structure:
* [code][offset][code][offset]...[0][length][data][data][data]...
* where code is 1:nmacroparms for %n,
* nmacroparms+1 for %v,
* nmacroparms+2:nmacroparms*2+1 for ^n
* and offset is the byte offset (from the offset byte) to the data
* where the parameter should be substituted
* and length is the number of data bytes
*/
boolean def_append(def, nparms, data)
unsigned char def[];
int nparms;
int data;
{
int base = (nparms << 1) + 1; /* this byte is the length */
/* first parameter has to be able to reference last byte: */
if ((def[base])++ >= (254 - (nparms << 1))) {
fferror("Data too long");
return FALSE;
}
def[base + def[base]] = data;
return TRUE;
}
def_type def_lookup(symbol)
char *symbol;
{
def_type defn = seq_dictionary(the_score);
while (defn) {
if (strcmp(defn->symbol, symbol) == 0) {
return defn;
}
defn = defn->next;
}
return NULL;
}
void def_parm(def, nparms, code)
unsigned char def[];
int nparms;
int code;
{
int i, j;
/* in order to insert a 2-byte parameter descriptor, the offsets from
* previous descriptors (that precede the data) need to be increased by 2:
*/
for (i = 1; i < (nparms << 1); i += 2) {
def[i] += 2;
}
/* now i is index of length; work backwards from the last byte, moving
* everything up by 2 bytes to make room for the new descriptor:
*/
for (j = i + def[i] + 2; j > i; j--) {
def[j] = def[j - 2];
}
/* now i is index of offset; insert the descriptor code (first byte)
* and the offset to the parameter location in the message (second byte)
*/
def[i - 1] = code;
def[i] = def[i + 2] + 2;
}
/****************************************************************************
* do_a_rest
* Effect: parses a rest (R) command
****************************************************************************/
private void do_a_rest()
{
if (token[fieldx])
fferror("Nothing expected after rest");
rest_flag = TRUE;
}
/****************************************************************************
* doabsdur
* Effect: parses an absolute dur (U) command
****************************************************************************/
private time_type doabsdur()
{
time_type result=1000L;
register char c;
if (isdigit(token[fieldx])) {
result = precise(scanint());
/* allow comma or paren for use in parameter lists */
if ((c = token[fieldx]) && (c != ',') && (c != ')') && (c != '+')) {
fferror("U must be followed by digits only");
}
if (time_scale == 1000) result *= 10; /* convert to ms */
} else fferror("No digit after U");
return result;
}
/****************************************************************************
* doabspitch
* Effect: parses an absolute pitch (P) command
****************************************************************************/
private int doabspitch()
{
int result = 60;
int startx = fieldx;
register char c;
int savex;
if (isdigit (token[fieldx])) {
result = (int) scanint();
/* allow comma or paren for abspitch in parameter */
if ((c = token[fieldx]) && c != ',' && c != ')')
fferror("P must be followed by digits only");
else if (result < minpitch) {
savex = fieldx;
fieldx = startx;
fferror("Minimum pitch of 0 will be used");
result = minpitch;
fieldx = savex;
} else if (result > maxpitch) {
savex = fieldx;
fieldx = startx;
fferror("Maximum pitch of 127 will be used");
result = maxpitch;
fieldx = savex;
}
} else fferror("No digits after P");
return result;
}
/* doartic -- compute an articulation factor */
/*
NOTE: artic is a percentage that scales the duration
of notes but not the time to the next note onset. It
is applied to the final computed duration after all
other scaling is applied.
*/
private void doartic()
{
if (isdigit(token[fieldx])) {
artic = (int) scanint();
if (token[fieldx])
fferror("Only digits were expected here");
} else fferror("No digits after /");
}
/* docall -- parse a call in the form !CALL fn(p1,p2,p3) */
/**/
private void docall()
{
boolean error_flag = TRUE;
ndurp = FALSE;
linex += scan();
if (token[0] == 0) fferror("Function name expected");
else {
char symbol[100];
struct symb_descr *desc;
long value[SEQ_MAX_PARMS];
int i=0;
scansymb(symbol);
if (fieldx == 1) fferror("Routine name expected");
else if (token[fieldx] != '(') fferror("Open paren expected");
else {
desc = &HASHENTRY(lookup(symbol));
if (!desc->symb_type) {
fieldx = 0;
fferror("Function not defined");
} else if (desc->symb_type != fn_symb_type) {
fieldx = 0;
gprintf(TRANS, "desc->symb_type is %d\n", desc->symb_type);
fferror("This is not a function");
} else {
error_flag = FALSE;
fieldx++; /* skip over paren */
for (i = 0; i < SEQ_MAX_PARMS; i++) value[i] = 0;
i = 0;
/* note that no params "()" is legal */
while (i < SEQ_MAX_PARMS && token[fieldx] != ')' &&
parseparm(&value[i])) {
i++;
if (token[fieldx] == ',') {
fieldx++;
} else if (token[fieldx] != ')') {
fferror("Unexpected character");
error_flag = TRUE;
break;
}
}
fieldx++;
if (i > SEQ_MAX_PARMS) fferror("Too many parameters");
}
while (TRUE) {
linex += scan();
if (nullstring(token)) {
break;
}
switch (token[0]) {
case 'T':
fieldx = 1;
dotime();
break;
case 'V':
fieldx = 1;
dovoice();
break;
case 'N':
fieldx = 1;
donextdur();
break;
default:
fferror("Unexpected character");
}
}
if (!error_flag)
insert_call(the_score, seqround(thetime), lineno, voice,
desc->ptr.routine, value, i);
/* advance the time only if an N field was given */
if (ndurp) thetime += ntime;
}
}
}
/* doclock -- insert a clock command */
/*
* derivation: if there is no previous clock running, then start the
* clock on time. Otherwise, start the clock half a tick early.
* ticksize = (beattime / 24) = ((60sec/tempo)/24) =
* ((60000ms/tempo)/24) = (60000/24)/tempo = 2500/tempo
*/
private void doclock()
{
int oldticksize = ticksize;
ticksize = (2500L << 16) / tempo;
insert_clock(the_score, seqround(thetime) - (oldticksize >> 17),
lineno, ticksize);
}
/****************************************************************************
* docomment
* Effect: parses a comment (*) command
****************************************************************************/
private void docomment()
{
line[linex] = '\n'; /* force end of line to skip comment line */
line[linex+1] = EOS;
}
/****************************************************************************
* doctrl
* Inputs:
* n: control number
* Effect: parses a control (K, M, O, X, or Y) command
****************************************************************************/
private void doctrl(n)
int n;
{
ctrlval[n] = (int) scanint();
if (token[fieldx]) {
fferror("Only digits expected here");
} else {
ctrlflag[n] = TRUE;
ctrlflag[0] = TRUE; /* ctrlflag[0] set if any flag is set */
}
}
private void dodef()
{
/* maximum def size is 256 + 9 parms * 2 + 2 = 276 */
unsigned char def[280];
char symbol[100];
int nparms = 0;
int nibcount = 0;
int data = 0;
register char c;
linex += scan();
if (!token[0]) fferror("Symbol expected");
else {
strcpy(symbol, token);
def[0] = def[1] = 0;
while (TRUE) {
linex += scan1(&line[linex]);
c = token[0];
if (!c) {
linex--;
if (nibcount & 1) {
fferror("Expected pairs of hex digits: one missing");
return;
}
break;
} else if (c == ' ' || c == '\t' || c == '\n') continue;
else if (isdigit(c)) {
data = (data << 4) + (c - '0');
nibcount++;
if (!(nibcount & 1)) {
if (!def_append(def, nparms, data))
return;
data = 0;
}
} else if ('A' <= c && c <= 'F') {
data = (data << 4) + (c - 'A') + 10;
nibcount++;
if (!(nibcount & 1)) {
if (!def_append(def, nparms, data))
return;
data = 0;
}
} else if (c == 'V') {
data = data << 4;
nibcount++;
/* v without a leading nibble is equivalent to 0v: */
if (nibcount & 1) nibcount++;
if (!def_append(def, nparms, data))
return;
def_parm(def, nparms++, nmacroparms+1);
} else if (c == '%') {
linex += scan1(&line[linex]);
c = token[0];
if (c < '1' || c > ('0' + nmacroparms)) {
fferror(parm_expected_error);
break;
}
if (!def_append(def, nparms, 0))
return;
def_parm(def, nparms++, c - '0');
} else if (c == '^') {
linex += scan1(&line[linex]);
c = token[0];
if (c < '1' || c > ('0' + nmacroparms)) {
fferror(parm_expected_error);
break;
}
if (!def_append(def, nparms, 0))
return;
def_parm(def, nparms++, (c - '0') + nmacroparms + 1);
} else { /* something unexpected here -- just exit */
linex--;
fferror("Unexpected data");
return;
}
}
insert_def(the_score, symbol, def,
(nparms << 1) + def[(nparms << 1) + 1] + 2);
}
}
/****************************************************************************
* dodur
* Effect: parses a duration (sum of dosymdur and/or doabsdur)
* sets symbolic_dur_flag (according to the first addend in mixed arithmetic)
*
* Returns: duration in "precise" units
****************************************************************************/
private time_type dodur()
{
time_type result = 0L;
symbolic_dur_flag = TRUE;
if (token[fieldx-1] == 'U') {
result = doabsdur();
symbolic_dur_flag = FALSE;
} else result = dosymdur();
while (token[fieldx] == '+') {
fieldx += 2;
if (token[fieldx-1] == 'U') result += doabsdur();
else result += dosymdur();
}
return scale(result, 100L, rate);
}
/****************************************************************************
* doerror
* Effect: parse an unrecognized field by reporting an error
****************************************************************************/
private void doerror()
{
fieldx = 0;
fferror("Bad field");
}
/****************************************************************************
* doloud
* Effect: parse a loudness (L) command
****************************************************************************/
private int doloud()
{
int i, j;
int result;
int oldfieldx = fieldx;
int newfieldx;
char symbol[100];
if (!token[fieldx] || token[fieldx]==')' || token[fieldx]==',') {
fferror("L must be followed by loudness indication");
return 100;
}
if (isdigit(token[fieldx])) {
result = (int) scanint();
newfieldx = fieldx;
if (token[fieldx] && token[fieldx]!=')' && token[fieldx]!=',')
fferror("Digits expected after L");
else if (result > 127) {
fieldx = oldfieldx;
fferror("Maximum loudness of 127 will be used");
fieldx = newfieldx;
result = 127;
} else if (result == 0) {
fieldx = oldfieldx;
fferror("Minimum loudness of 1 will be used");
fieldx = newfieldx;
result = 1;
}
return result;
}
scansymb(symbol);
newfieldx = fieldx;
if ((i = strlen(symbol)) > 3 ) { /* maximum is 3, e.g. "ppp" */
fieldx = oldfieldx;
fferror("Loudness field too long");
fieldx = newfieldx;
return 100;
}
symbol[i + 1] = '\0'; /* pad short symbols with 0 */
/* e.g. "p\0" -> "p\0\0" */
for (i = 0; i <= 7; i++) { /* loop through possibilities */
for (j = 0; j <= 2; j++) { /* test 3 characters */
if (symbol[j] != loudtable[i].symbol[j])
break;
}
if (j == 3) {
return loudtable[i].value;
}
}
fieldx = oldfieldx;
fferror("Bad loudness indication");
fieldx = newfieldx;
return 100;
}
void domacro()
{
int control_num;
int value;
if (isdigit(token[1])) {
control_num = (int) scanint();
if (token[fieldx] == '(') {
fieldx++;
if (!isdigit(token[fieldx])) {
fferror("Control value expected");
} else {
value = (int) scanint();
if (token[fieldx] != ')') {
fferror("Missing close paren");
} else {
fieldx++;
if (token[fieldx])
fferror("Nothing expected after paren");
else if (macctrlx < nmacroctrl - 1) {
macctrlnum[macctrlx] = control_num;
macctrlparmx[macctrlx] = value;
macctrldef[macctrlx] = NULL;
macctrlx++;
} else fferror("Too many controls");
}
}
} else fferror("Missing paren");
} else {
def_type def;
char symbol[100];
scansymb(symbol);
if (fieldx == 1) fferror("Macro name expected");
else if (token[fieldx] != '(') fferror("Open paren expected");
else {
fieldx++;
def = def_lookup(symbol);
if (!def) {
fieldx = 1;
fferror("Undefined macro");
} else {
long val;
macctrlnum[macctrlx] = 0;
macctrlparmx[macctrlx] = macctrlnextparm;
macctrldef[macctrlx] = def;
while (token[fieldx] != ')' && parseparm(&val)) {
macctrlparms[macctrlnextparm++] = (short) val;
macctrlnum[macctrlx]++;
if (token[fieldx] == ',') {
fieldx++;
} else if (token[fieldx] != ')') {
fferror("Unexpected character");
break;
}
}
fieldx++;
macctrlx++;
}
}
}
}
/****************************************************************************
* donextdur
* Effect: parse a next (N) command
* Implementation:
* The syntax is N followed by a duration, so save dur and use dosymdur()
* to parse the duration field.
* The form N<digits> is parsed directly with scanint().
****************************************************************************/
private void donextdur()
{
ndurp = TRUE; /* flag that N was given */
if (isdigit(token[fieldx])) {
ntime = precise(scanint());
ntime = scale(ntime, (ulong)time_scale, rate);
if (token[fieldx])
fferror("Only digits were expected here");
} else {
fieldx++;
ntime = dodur();
}
}
/****************************************************************************
* dopitch
* Effect: parses a pitch command
****************************************************************************/
private int dopitch()
{
int p, octave=0;
int octflag = FALSE; /* set if octave is specified */
int oldfieldx = fieldx;
p = pitchtable[token[fieldx-1]-'A'];
while (TRUE) {
if (token[fieldx] == 'S') { /* sharp */
p++;
fieldx++;
}
else if (token[fieldx] == 'N') { /* skip */
fieldx++;
}
else if (token[fieldx] == 'F') { /* flat */
p--;
fieldx++;
}
else if (isdigit(token[fieldx]) && !octflag) { /* octave */
octave = (int) scanint();
octflag = TRUE;
}
else break; /* none of the above */
}
if (octflag) p = (p-48) + 12 * octave; /* adjust p to given octave */
else { /* adjust p to note nearest the default pitch */
int octdiff = (p + 126 - pitch) / 12;
p = p + 120 - (octdiff * 12);
}
if (p > maxpitch) { /* pitch in range? */
int newfield = fieldx;
fieldx = oldfieldx;
fferror("Pitch too high");
fieldx = newfield;
p = maxpitch;
}
/* We really should test for end-of-field, but we don't know if we're
in a parameter list, so comma may or may not be legal */
return p;
}
/****************************************************************************
* doprogram
* Effect: parses a program change (Z) command
****************************************************************************/
private void doprogram()
{
register int program = (int) scanint();
ctrlflag[PROGRAM_CTRL] = ctrlflag[0] = TRUE;
if (token[fieldx]) {
fferror("Z must be followed by digits only");
} else if (program < minprogram) {
fieldx = 1;
fferror("Minimum program of 1 will be used");
program = minprogram;
} else if (program > maxprogram) {
fieldx = 1;
fferror("Maximum program of 128 will be used");
program = maxprogram;
}
ctrlval[PROGRAM_CTRL] = program - 1;
}
private void doramp()
{
int values[2];
time_type stepsize = 100L; /* default 10 per second */
int index = 0;
ndurp = FALSE;
values[0] = values[1] = 0;
while (TRUE) {
linex += scan();
fieldx = 1;
if (nullstring(token)) {
break;
} else if (index == 2) { /* must be stepsize in dur syntax */
stepsize = dodur();
} else {
int ctrlx = 0;
static int ctrl_map[] = { -BEND_CTRL, VOLUME, -TOUCH_CTRL, MODWHEEL };
switch (token[0]) {
case 'M': ctrlx++; /* modwheel */
case 'O': ctrlx++; /* aftertouch */
case 'X': ctrlx++; /* volume */
case 'Y': /* pitch bend */
if (index < 2) {
macctrlnum[index] = ctrl_map[ctrlx];
macctrlparmx[index] = (int) scanint();
if (token[fieldx])
fferror("Only digits expected here");
macctrldef[index] = NULL;
} else fferror("Unexpected control");
break;
case '~':
if (index < 2) {
domacro();
if (token[fieldx]) fferror("Unexpected character");
} else fferror("Unexpected control");
break;
case 'T':
if (index < 2) fferror("Control expected");
dotime();
break;
case 'V':
if (index < 2) fferror("Control expected");
dovoice();
break;
case 'N':
if (index < 2) fferror("Control expected");
donextdur();
break;
default:
if (index < 2) fferror("Control expected");
dur = dodur();
break;
}
if (index == 1 && (macctrlnum[0] != macctrlnum[1] ||
macctrldef[0] != macctrldef[1])) {
fferror("Controls do not match");
}
}
index++;
}
if (index < 3) fferror("Expected 2 controls and step size");
else {
if (macctrldef[0]) {
int i, j, n;
n = 0;
i = macctrlparmx[0];
j = macctrlparmx[1];
while (n < macctrlnum[0]) {
if (macctrlparms[i] != macctrlparms[j]) break;
n++; i++; j++;
}
if (n >= macctrlnum[0]) n = 0;
/* Note: duration shortened to prevent overlap with next ramp */
insert_deframp(the_score, seqround(thetime), lineno, voice,
seqround(stepsize), trunc(dur) - 1, macctrldef[0], macctrlnum[0],
macctrlparms + macctrlparmx[0], n, macctrlparms[j]);
} else {
/* Note: duration shortened to prevent overlap with next ramp */
insert_ctrlramp(the_score, seqround(thetime), lineno, voice,
seqround(stepsize), trunc(dur) - 1,
macctrlnum[0], macctrlparmx[0], macctrlparmx[1]);
}
}
/* advance the time only if an N field was given */
if (ndurp) thetime += ntime;
else thetime += dur;
}
/****************************************************************************
* dorate
* Effect: parses a !rate command
****************************************************************************/
private void dorate()
{
linex += scan();
if (!token[0])
fferror("rate number expected");
else {
long oldrate = rate;
rate = (int) scanint();
if (token[fieldx])
fferror("Only digits expected here");
if (rate == 0) {
fieldx = 0;
fferror("Rate 100 will be used here");
rate = 100L;
}
start = thetime;
/* adjust dur in case it is inherited by next note */
dur = (dur * oldrate);
dur = dur / rate;
}
}
private void doset(vec_flag)
boolean vec_flag;
{
ndurp = FALSE;
linex += scan();
if (!token[0]) fferror("Variable name expected");
else {
struct symb_descr *desc = &HASHENTRY(lookup(token));
if (!desc->symb_type) fferror("Called function not defined");
else if (vec_flag && (desc->symb_type != vec_symb_type)) {
fferror("This is not an array");
} else if (!vec_flag && (desc->symb_type != var_symb_type)) {
fferror("This is not a variable");
} else {
int numargs = 1 + vec_flag;
int value[2];
int i;
int *address = desc->ptr.intptr;
value[0] = value[1] = 0;
i = 0;
while (TRUE) {
linex += scan();
if (nullstring(token)) {
break;
} else if (isdigit(token[0]) || token[0] == '-' ||
token[0] == '+') {
if (i < numargs) {
value[i++] = (int) scansgnint();
if (token[fieldx])
fferror("Only digits expected here");
} else fferror(too_many_error);
} else {
switch (token[0]) {
case 'T':
fieldx = 1;
dotime();
break;
case 'V':
fieldx = 1;
dovoice();
break;
case 'N':
fieldx = 1;
donextdur();
break;
default:
fieldx++;
if (i < numargs) {
value[i++] = seqround(dodur());
} else fferror(too_many_error);
break;
}
}
}
if (vec_flag && i != 2) fferror("No index given");
if (vec_flag) {
if (value[0] >= desc->size) {
fferror("Subscript out of bounds");
return;
}
/* reduce to the seti case: */
address += value[0]; /* compute the vector address */
value[0] = value[1]; /* set up value[] and i as if */
i--; /* this were seti, not setv */
}
if (i != 1) fferror("No value given");
insert_seti(the_score, seqround(thetime), lineno, voice,
address, value[0]);
/* advance the time only if an N field was given */
if (ndurp) thetime += ntime;
}
}
}
/****************************************************************************
* dospecial
* Effect: parses special (those starting with "!") commands
****************************************************************************/
private void dospecial()
{
switch (issymbol()) {
case sym_tempo:
dotempo();
break;
case sym_rate:
dorate();
break;
case sym_csec:
/* adjust dur for inheritance by next note */
dur = (dur * 1000L) / time_scale;
time_scale = 1000L;
break;
case sym_msec:
dur = (dur * 100L) / time_scale;
time_scale = 100L;
break;
case sym_seti:
doset(FALSE);
break;
case sym_setv:
doset(TRUE);
break;
case sym_call:
docall();
break;
case sym_ramp:
doramp();
break;
case sym_clock:
doclock();
break;
case sym_def:
dodef();
break;
case sym_end:
end_flag = TRUE;
break;
default:
fferror("Special command expected");
}
parseend(); /* flush the rest of the line */
}
/****************************************************************************
* dosymdur
* Effect: parses a duration (^, %, S, I, Q, H, or W) command
****************************************************************************/
private time_type dosymdur()
{
int i, dotcnt = 0;
long dotfactor;
time_type result = 0;
for (i = 0; i < durtable_len; i++) {
if (durtable[i].symbol == token[fieldx-1]) {
/* the shift right is because durs are stored doubled because
* otherwise a 64th note would have the value 75/2: */
result = precise(durtable[i].value) >> 1;
break;
}
}
if (i == durtable_len) {
fieldx--;
fferror("Duration expected: one of W, H, Q, I, S, %, or ^");
return 0L;
}
while (token[fieldx]) {
if (token[fieldx] == 'T') { /* triplet notation */
result = (result * 2) / 3; /* lose a bit but avoid scale() */
fieldx++;
}
else if (token[fieldx] == '.') { /* dotted notation */
dotcnt++;
fieldx++;
}
else if (token[fieldx] == '/') {
long divisor;
fieldx++;
divisor = scanint();
if (divisor > 0) result = result / divisor;
else fferror("non-zero integer expected");
}
else if (isdigit(token[fieldx])) { /* numbers are multipliers */
result = result * scanint();
}
else break;
}
dotfactor = 1L;
for (i=1; i<=dotcnt; i++)
dotfactor = dotfactor * 2;
result = (2 * result) - (result / dotfactor);
return scale(result, 100L, tempo); /* time in milliseconds */
}
/****************************************************************************
* dotempo
* Effect: parses a !tempo command
****************************************************************************/
private void dotempo()
{
linex += scan();
if (!token[0])
fferror("Tempo number expected");
else {
long oldtempo = tempo;
tempo = scanint();
if (token[fieldx])
fferror("Only digits expected here");
if (tempo == 0) {
fieldx = 0;
fferror("Tempo 100 will be used here");
tempo = 100L;
}
start = thetime;
/* adjust dur in case it is inherited by next note */
if (symbolic_dur_flag) {
dur = (dur * oldtempo);
dur = dur / tempo;
}
}
}
/****************************************************************************
* dotime
* Effect: parses a time (T) command
* Implementation: see implementation of donextdur()
****************************************************************************/
private void dotime()
{
if (isdigit(token[fieldx])) {
thetime = precise(scanint());
thetime = scale(thetime, (ulong)time_scale, rate);
if (token[fieldx] )
fferror("Only digits were expected here");
} else {
fieldx++;
thetime = dodur();
}
thetime += start; /* time is relative to start */
}
/****************************************************************************
* dovoice
* Effect: parse a voice (V) command (the voice is the MIDI channel)
****************************************************************************/
private void dovoice()
{
if (isdigit(token[fieldx])) {
voice = (int) scanint();
if (token[fieldx])
fferror("V must be followed by digits only");
if (voice > MAX_CHANNELS) {
char msg[40];
sprintf(msg, "number too high, using %d instead", MAX_CHANNELS);
fferror(msg);
voice = MAX_CHANNELS;
}
else if (voice < 1) {
fferror("number too low, using 1 instead");
voice = 1;
}
}
else fferror("No digit after V");
}
/****************************************************************************
* fferror
* Inputs:
* char *s: an error message string
* Effect:
* prints the line with the error
* puts a cursor (^) at the error location
* prints the error message (s)
* Implementation:
* this routine prints a carat under the character that
* was copied into token[fieldx]. E.g. if fieldx = 0, the
* carat will point to the first character in the field.
****************************************************************************/
private void fferror(s)
char *s;
{
gprintf(ERROR, "%3d | %s", lineno, line);
marker(linex-strlen(token)+fieldx+1+6);
gprintf(ERROR, "Error: %s.\n", s);
}
/****************************************************************************
* init
* Effect:
* initializes the state variables
****************************************************************************/
private void init()
{
int i;
end_flag = FALSE;
/* initial (default) values for all state variables */
symbolic_dur_flag = TRUE; /* default dur is symbolic */
for (i = 0; i < nctrl; i++) {
/* no initial control changes */
ctrlflag[i] = FALSE;
ctrlval[i] = 0;
}
lineno = 0;
pitch = seq_dflt_pitch;
loud = seq_dflt_loud;
voice = seq_dflt_voice;
time_scale = 1000L;
tempo = 100L;
rate = 100L;
dur = precise(600); /* default dur is quarter note */
thetime = precise(0);
start = thetime;
ntime = 0L;
ticksize = 0L;
artic = 100;
}
/****************************************************************************
* ins_a_note
* Returns:
* boolean: TRUE on success, FALSE if not enough memory
* Effect:
* note events (if any) corresponding to the current line are inserted
* Implementation:
* if a note on should occur after a note off and doesn't, and the
* two notes have the same pitch, then the note off can cancel the
* note on. to make it unlikely that roundoff will cause this situation,
* dur is decreased by one half of a clock tick before rounding.
* also, phase2 gives precedence to note-offs that are simultaneous
* with note-ons.
****************************************************************************/
private boolean ins_a_note()
{
long the_dur = (trunc(dur) * artic + 50) / 100;
int the_pitch = pitch;
event_type note;
if (rest_flag) the_pitch = NO_PITCH;
note = insert_note(the_score, seqround(thetime), lineno, voice,
the_pitch, the_dur, loud);
if (!note) return FALSE;
return TRUE; /* success! */
}
/****************************************************************************
* ins_ctrls
* Returns:
* boolean: TRUE on success, FALSE if not enough memory
* Effect:
* control events corresponding to current line are inserted in score
* Implementation:
* ctrlflag[i] is TRUE if control i was specified in this line, so
* insert one control change for each ctrlflag[i] that is TRUE
****************************************************************************/
private boolean ins_ctrls()
{
int i;
event_type ctrl;
for (i = 1; i < nctrl; i++) {
if (ctrlflag[i]) {
ctrl = insert_ctrl(the_score, seqround(thetime), lineno, i, voice,
ctrlval[i]);
if (!ctrl) return FALSE;
ctrlflag[i] = FALSE;
ctrlval[i] = 0;
}
}
return TRUE; /* success! */
}
/****************************************************************************
* issymbol
* Outputs: returns symbol number, or -1 if no match
* Assumes: token[1] has the symbol to look up (token[0] == '!')
****************************************************************************/
private int issymbol()
{
int i, symb_num;
char *sym;
for (symb_num = 0; symb_num < sym_n; symb_num++) {
sym = ssymbols[symb_num];
i = 1;
while (TRUE) {
if (token[i] != *sym) break;
if (*sym == 0) return symb_num;
sym++;
i++;
}
}
return -1;
}
/****************************************************************************
* marker
* Inputs:
* int count: the number of characters to indent
* Effect:
* prints a carat (^) at the position specified on file stderr
****************************************************************************/
private void marker(count)
int count;
{
int i;
char s[128];
for (i=0; i<(count-1); s[i++]=' ') /* */ ;
s[count-1] = '^';
s[count] = '\0';
gprintf(ERROR,"%s\n",s);
}
/*****************************************************************
* parseend
* Effect:
* parse the note terminator, either ",", ";", EOS or "\n"
*
****************************************************************/
private void parseend()
{
boolean done = FALSE;
while (!done) {
linex += scan1(&line[linex]);
switch (token[0]) {
case ',':
ndurp = TRUE; /* switch that next time was specified */
ntime = 0L;
done = TRUE;
break;
case ';':
case '\n':
case EOS:
done = TRUE;
break;
case ' ':
case '\t':
break; /* skip over blanks and scan1 again */
default:
fferror("Unexpected token");
linex += scan(); /* flush the token */
break;
}
}
}
/****************************************************************************
* parsefield
* Effect: looks at first character of token and calls a parsing routine
*
****************************************************************************/
private void parsefield()
{
fieldx = 1;
switch (token[0]) {
case 'T' :
dotime();
break;
case 'U':
case 'W':
case 'H':
case 'Q':
case 'S':
case 'I':
case '%':
case '^':
dur = dodur();
break;
case 'R':
do_a_rest();
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
pitch = dopitch();
pitch_flag = TRUE;
break;
case 'P':
pitch = doabspitch();
pitch_flag = TRUE;
break;
case 'L':
loud = doloud();
break;
case 'N':
donextdur();
break;
/* case 'J':
* doctrl(1);
* break;
*/
case 'K':
doctrl(PSWITCH_CTRL);
break;
case 'M':
doctrl(MODWHEEL_CTRL);
break;
case 'O':
doctrl(TOUCH_CTRL);
break;
case 'X':
doctrl(VOLUME_CTRL);
break;
case 'Y':
doctrl(BEND_CTRL);
break;
case 'Z':
doprogram();
break;
case 'V':
dovoice();
break;
case '~':
domacro();
break;
case '*':
docomment();
break;
case '#':
doartic();
break;
default :
doerror();
break;
}
}
/****************************************************************************
* parsenote
* Effect:
* parses a note line -- control events (if any) and note event (if
* present) are inserted into score
* Assumes:
* line contains a string to be parsed
****************************************************************************/
private boolean parsenote()
{
boolean out_of_memory = FALSE;
int i;
ndurp = FALSE;
rest_flag = FALSE;
/* this loop reads tokens for a note */
while (token[0]) {
parsefield();
linex += scan();
}
parseend(); /* take care of note terminator */
/*
* insert ctrl's first so that will come before the note.
*/
if (ctrlflag[0]) {
out_of_memory |= !ins_ctrls();
/* don't reset ctrlflag[0], it's used below */
}
/*
* insert macro's
*/
for (i = 0; i < macctrlx; i++) {
event_type ctrl;
if (macctrldef[i] == NULL) {
ctrl = insert_macctrl(the_score, seqround(thetime), lineno,
macctrlnum[i], voice, macctrlparmx[i]);
} else {
ctrl = insert_macro(the_score, seqround(thetime), lineno,
macctrldef[i], voice, macctrlnum[i],
&(macctrlparms[macctrlparmx[i]]));
}
out_of_memory |= (ctrl == NULL);
}
/* insert a note if
* (1) a pitch was specified OR
* (2) no control was specified and this is not a rest
* (it's a pitch by default)
*
* NOTE: program changes during rests are advised since
* synthesizers may not be able to process a program
* change followed immediately by a note-on. In fact, this
* is why we insert notes whose pitch is NO_PITCH -- so that
* the program change can be processed during the rest.
*/
if (pitch_flag ||
(!ctrlflag[0] && !rest_flag && (macctrlx == 0))) {
out_of_memory |= !ins_a_note();
}
if (ndurp) thetime += ntime;
else thetime += dur;
return out_of_memory;
}
private boolean parseparm(valptr)
long *valptr;
{
register char c = token[fieldx];
if (isdigit(c) || c == '-') {
*valptr = scansgnint();
return TRUE;
} else {
switch (c) {
case 'P':
fieldx++;
*valptr = doabspitch();
return TRUE;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
fieldx++;
*valptr = dopitch();
return TRUE;
case 'U':
case 'W':
case 'H':
case 'Q':
case 'I':
case 'S':
case '%':
case '^':
fieldx++;
*valptr = seqround(dodur());
return TRUE;
case 'L':
fieldx++;
*valptr = doloud();
return TRUE;
case '\'':
fieldx++;
*valptr = token[fieldx];
fieldx++;
if (token[fieldx] != '\'') {
fferror("single quote expected");
}
fieldx++;
return TRUE;
default:
fferror("Parameter expected");
return FALSE;
}
}
}
/****************************************************************************
* scale
* Inputs:
* time_type x
* int (ulong?) n, d
* Outputs:
* returns time_type: result of scaling x by n/d
****************************************************************************/
public time_type scale(x, n, d)
ulong x;
ulong n, d;
{
ulong lo = (x & 0xFFFFL) * n;
ulong hi = (x >> 16) * n;
ulong res = hi / d;
lo = (((hi - (res * d)) << 16) + lo + (d >> 1)) / d;
return (time_type)( (res << 16) + lo );
}
/****************************************************************************
* scan
* Inputs:
* char *start: the string to scan
* Outputs:
* returns int: the index of the next char in start to scan
* Effect:
* skips over leading blanks
* copies characters from start into token, converting to upper case
* scanning stops on delimiter: one of space, tab, newline, semicolon
****************************************************************************/
private int scan()
{
char *start = line + linex;
register char c;
register int i = 0;
register int j = 0;
register int parens = 0;
while (((c = start[i]) == ' ') || (c == '\t')) i++;
while ((c = start[i]) != ' ' && c != '\n' && c != '\t' && c != EOS &&
(c != ',' || token[0] == '~' || parens > 0) && c != ';') {
if (islower(start[i])) token[j] = toupper(start[i]);
else token[j] = start[i];
if (c == '(') parens++;
else if (c == ')') parens--;
j++;
i++;
}
token[j] = '\0';
fieldx = 0;
if (parens) fferror("Unbalanced parens");
return i;
}
/****************************************************************************
* scan1
* Inputs:
* char *start: the string to scan
* Outputs:
* returns int: the index of the next char in start to scan
* Effect:
* copies one char from start into token, converting to upper case
****************************************************************************/
private int scan1(start)
char *start;
{
int i = 0;
token[0] = *start;
if (islower(token[0])) token[0] = toupper(token[0]);
if (!nullstring(token)) {
token[1] = '\0';
i = 1;
}
fieldx = 0;
return i;
}
/****************************************************************************
* scanint
* Outputs:
* returns long: the scanned integer
* Effect:
* scans an unsigned long from token, starting at fieldx
* fieldx is incremented to end of the integer
****************************************************************************/
private long scanint()
{
long i = 0;
char c;
while ((c = token[fieldx])) {
if (isdigit(c)) {
i = (i*10) + (c - '0');
fieldx++;
} else return i;
}
return i;
}
private long scansgnint()
{
if (token[fieldx] == '-') {
fieldx++;
return -scanint();
} else {
if (token[fieldx] == '+') {
fieldx++;
}
return scanint();
}
}
/* scansymb -- scan a symbol from the token */
/**/
private void scansymb(str)
char *str;
{
char c;
while ((c = token[fieldx])) {
if (isdigit(c) || isalpha(c) || c == '_') {
*str++ = c;
fieldx++;
} else break;
}
*str = EOS;
}
/****************************************************************************
* seq_read
* Inputs:
* seq_type seq: the sequence to receive the score
* FILE *fp: input file
* Outputs:
* none
* Effect:
* parses score from input file and builds score data structure
****************************************************************************/
void seq_read(seq, fp)
seq_type seq;
FILE *fp;
{
boolean out_of_memory = FALSE; /* set when no more memory */
/* printf("seq_read: chunklist is 0x%x\n", seq->chunklist); */
the_score = seq; /* current sequence is a global within this module */
if (!seq) return;
init();
lineno = 0;
/* make sure line is well terminated or scan might run off the end */
line[linesize - 1] = EOS;
line[linesize - 2] = '\n';
/* this loop reads lines */
while ((fgets(line, linesize - 2, fp) != NULL) && !out_of_memory &&
!check_aborted() && !end_flag) {
lineno++;
linex = 0;
/* this loop reads notes from a line */
while ((line[linex] != EOS) && !out_of_memory) {
/* loop invariant: line[linex] is first char of next note */
ctrlflag[0] = FALSE; /* other ctrlflags are reset by ins_ctrls() */
macctrlx = 0;
macctrlnextparm = 0;
pitch_flag = FALSE;
linex += scan();
if (!nullstring(token)) {
if (token[0] == '*') docomment();
else if (token[0] == '!') dospecial();
else out_of_memory = parsenote();
}
else parseend();
}
}
if (out_of_memory) {
gprintf(ERROR, "Out of note memory at line %d,\n", lineno-1);
gprintf(ERROR, " the rest of your file will be ignored.\n");
}
if (check_aborted()) {
gprintf(ERROR, "User aborted score input,\n");
gprintf(ERROR, " the rest of your file will be ignored.\n");
if (abort_flag == BREAK_LEVEL) abort_flag = 0;
}
/* fclose(fp); -- don't close the file; if you do, Nyquist's garbage
collector will close Nyquist's copy, and closing the file twice
in Linux will crash Nyquist */
gprintf(TRANS, "\nLoaded Adagio file with %ld note(s), %ld ctrl(s).\n\n",
seq_notecount(the_score), seq_ctrlcount(the_score));
}
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