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unit globals;
{ 1. All global variables.
2. Miscellaneous other procedures required by several Units.
}
interface
const PMXlinelength = 128;
{ !!! One or more of the following constants should be reduced if this
program is to be compiled by a 16-bit compiler (e.g. Turbo Pascal),
otherwise you get a "Data segment too large" error }
lines_in_paragraph = 100;
max_words = 128;
max_notes = 128;
{ Christian Mondrup's suggestion to reduce data segment size:
lines_in_paragraph = 50;
max_words = 64;
max_notes = 64;
}
max_bars = 16;
maxstaves = 15;
maxvoices = 15;
maxgroups = 3;
standardPMXvoices = 12;
max_lyrics_line_length = PMXlinelength-4;
inf = 32000;
unspec = 1000;
default_size = 20;
start_beam = '[';
stop_beam = ']';
rest = 'r';
pause = 'rp';
dotcode = 'd';
grace_group = 'G';
multi_group = 'x';
barsym = '|';
comment = '%';
double_comment: string[2] = '%%';
blank = ' ';
dot = '.';
comma = ',';
colon = ':';
tilde = '~';
atsign = '@';
dummy = #0;
ndurs = 8;
durations: string[ndurs] = '90248136';
unspecified = '5'; { Not a valid duration }
whole = 2; { position of '0' in durations }
terminators: string = '.x';
digits = '123456789';
digitsdot = '0123456789.';
has_duration: string[8] = 'abcdefgr';
solfa_names: string[7] = 'drmfslt';
choice: char = ' ';
outfile_open: boolean = false;
texdir: string = '';
old_meter_word: string = '';
outlen: integer = 0;
putspace = true;
nospace = false;
ignore_input: boolean = false;
print = true;
type
paragraph_index = 1..lines_in_paragraph;
voice_index = 1..maxvoices;
stave_index = 1..maxstaves;
bar_index0 = 0..max_bars;
word_index0 = 0..max_words;
paragraph_index0 = 0..lines_in_paragraph;
voice_index0 = 0..maxvoices;
stave_index0 = 0..maxstaves;
paragraph = array[paragraph_index] of string;
line_nos = array[paragraph_index] of integer;
var voice_label: array[voice_index] of string;
clef: array[stave_index] of char;
instr, stave, first_on_stave, number_on_stave:
array[stave_index] of voice_index0;
nspace, stave_size: array[stave_index] of integer;
nvoices, nstaves, ninstr, bottom, top: voice_index0;
one_beat, full_bar, line_no, short_note, musicsize,
meternum, meterdenom, pmnum, pmdenom, paragraph_no,
bar_no, pickup, nbars, nleft: integer;
para_len: paragraph_index0;
xmtrnum0: real;
P: paragraph;
orig_line_no: line_nos;
infile, outfile, stylefile: text;
default_duration: char;
fracindent, this_version, this_version_date: string;
pmx_preamble_done, first_paragraph, final_paragraph, must_respace,
must_restyle, multi_bar_rest, some_vocal: boolean;
procedure error(message: string; printLine: boolean);
procedure fatalerror(message: string);
procedure warning(message: string; printLine: boolean);
function PMXinstr (stave: integer): integer;
procedure setDefaultDuration(meterdenom: integer);
procedure getMeter(line: string;
var meternum, meterdenom, pmnum, pmdenom: integer);
procedure setSpace(line: string);
function meterChange(n1, n2: integer; blind: boolean): string;
function meterWord (num, denom, pnum, pdenom: integer): string;
procedure cancel(var num,denom: integer; lowest: integer);
function isNoteOrRest(w: string): boolean;
function isPause(note: string): boolean;
implementation uses strings, control, utility;
function isNoteOrRest(w: string): boolean;
begin isNoteOrRest := pos1(w[1],has_duration)>0; end;
function isPause(note: string): boolean;
begin isPause:=startsWith(note,pause); end;
procedure cancel(var num,denom: integer; lowest: integer);
begin while (num mod 2 = 0) and (denom>lowest) do
begin num:=num div 2; denom:=denom div 2; end;
end;
function meterWord (num,denom,pnum,pdenom: integer): string;
begin meterWord := 'm' + toString(num) + '/' + toString(denom) +
'/' + toString(pnum) + '/' + toString(pdenom);
end;
function meterChange(n1, n2: integer; blind: boolean): string;
var f, l: integer;
begin
if blind then
begin f:=64; l:=n1 * (64 div n2);
cancel(l,f,meterdenom); meterChange := meterWord (l,f,0,0);
if meternum>0 then
writeln('Blind meter change to ', l, '/', f, ' on line ', line_no);
end
else meterChange := meterWord(n1,n2,0,0);
end;
procedure setSpace(line: string);
var i: integer;
word: string;
begin i:=0;
while i<ninstr do
begin word:=GetNextWord(line,blank,dummy);
if word='' then exit;
inc(i); getNum(word,nspace[i]);
end;
end;
procedure onumber (s: string; var j, n1: integer);
begin if s[j]='o' then n1:=1 else if s[j]='1' then
begin n1:=10+digit(s[j+1]); inc(j); end
else n1:=digit(s[j]);
inc(j);
end;
procedure extractNumber(var s: string; var k: integer);
var w: string;
begin w:=getNextWord(s,'/',dummy); getNum(w,k);
end;
procedure readMeter (meter: string;
var meternum, meterdenom, pmnum, pmdenom: integer);
var j: integer;
begin if meter[1]='m' then
if pos1('/',meter)=0 then
begin j:=2; onumber(meter,j,meternum); onumber(meter,j,meterdenom);
onumber(meter,j,pmnum); onumber(meter,j,pmdenom);
end
else begin predelete(meter,1);
extractNumber(meter,meternum); extractNumber(meter,meterdenom);
extractNumber(meter,pmnum); extractNumber(meter,pmdenom);
end
else begin getTwoNums(meter, meternum, meterdenom);
pmnum:=meternum; pmdenom:=meterdenom;
end;
end;
procedure getMeter(line: string;
var meternum, meterdenom, pmnum, pmdenom: integer);
var meter: string;
begin meter:=GetNextWord(line,blank,dummy);
if (meter='C/') or (meter='mC/') then
begin meternum:=2; meterdenom:=2; pmdenom:=5; pmnum:=0; end
else if (meter='C') or (meter='mC') then
begin meternum:=4; meterdenom:=4; pmdenom:=6; pmnum:=0; end
else readMeter(meter,meternum,meterdenom,pmnum,pmdenom);
if meterdenom=0 then Error
(meter+': Meter denominator must be nonzero',print);
end;
function whereInParagraph(l: integer): integer;
var j: integer;
begin whereInParagraph:=0;
for j:=1 to para_len do if orig_line_no[j]=l then
begin whereInParagraph:=j; exit end;
end;
procedure fatalerror(message: string);
begin setFeature('ignoreErrors',false); error(message,not print) end;
procedure error(message: string; printline: boolean);
var j: integer;
begin
writeln (message, ': ERROR on line ', line_no);
j:=whereInParagraph(line_no); if (j>0) and printline then writeln(P[j]);
if not ignoreErrors then
begin if outfile_open then
begin close(outfile); rewrite(outfile); close(outfile); end;
if line_no=0 then line_no:=10000;
halt(line_no);
end;
end;
procedure warning(message: string; printline: boolean);
var j: integer;
begin
if line_no>0 then
begin writeln (message, ': WARNING on line ', line_no);
if not printline then exit;
j:=whereInParagraph(line_no); if j>0 then writeln(P[j])
end
else writeln (message, ': WARNING in preamble');
end;
function PMXinstr (stave: integer): integer;
begin PMXinstr := ninstr + 1 - instr[stave]; end;
procedure setDefaultDuration(meterdenom: integer);
begin
case meterdenom of
1: default_duration:='0';
2: default_duration:='2';
4: default_duration:='4';
8: default_duration:='8';
16: default_duration:='1';
32: default_duration:='3';
64: default_duration:='6';
end;
end;
end.
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