ref: 0977f294bab0345ba43fbf674449fd8e996c5719
dir: /appl/lib/tcl_calc.b/
implement TclLib;
include "sys.m";
sys: Sys;
include "draw.m";
include "tk.m";
include "string.m";
str : String;
include "tcl.m";
include "tcllib.m";
include "math.m";
math : Math;
include "regex.m";
regex : Regex;
include "utils.m";
htab: Int_Hashtab;
IHash: import htab;
leaf : adt {
which : int;
s_val : string;
i_val : int;
r_val : real;
};
where : int;
text:string;
EOS,MALFORMED,UNKNOWN,REAL,INT,STRING,FUNC,ADD,SUB,MUL,MOD,DIV,LAND,
LOR,BAND,BOR,BEOR,EXCL,TILDE,QUEST,COLON,F_ABS,F_ACOS,F_ASIN,F_ATAN,
F_ATAN2,F_CEIL,F_COS,F_COSH,F_EXP,F_FLOOR,F_FMOD,F_HYPOT,F_LOG,F_LOG10,
F_POW,F_SIN,F_SINH,F_SQRT,F_TAN,F_TANH,L_BRACE,R_BRACE,COMMA,LSHIF,RSHIF,
LT,GT,LEQ,GEQ,EQ,NEQ : con iota;
i_val : int;
r_val : real;
s_val : string;
numbers : con "-?(([0-9]+)|([0-9]*\\.[0-9]+)([eE][-+]?[0-9]+)?)";
re : Regex->Re;
f_table : ref IHash;
started : int;
# does an eval on a string. The string is assumed to be
# mathematically correct. No Tcl parsing is done.
commands := array[] of {"calc"};
about() : array of string {
return commands;
}
init() : string {
sys = load Sys Sys->PATH;
str = load String String->PATH;
math = load Math Math->PATH;
regex = load Regex Regex->PATH;
htab = load Int_Hashtab Int_Hashtab->PATH;
started=1;
if (regex==nil || math==nil || str==nil || htab==nil)
return "Cannot initialise calc module.";
f_table=htab->alloc(101);
f_table.insert("abs",F_ABS);
f_table.insert("acos",F_ACOS);
f_table.insert("asin",F_ASIN);
f_table.insert("atan",F_ATAN);
f_table.insert("atan2",F_ATAN2);
f_table.insert("ceil",F_CEIL);
f_table.insert("cos",F_COS);
f_table.insert("cosh",F_COSH);
f_table.insert("exp",F_EXP);
f_table.insert("floor",F_FLOOR);
f_table.insert("fmod",F_FMOD);
f_table.insert("hypot",F_HYPOT);
f_table.insert("log",F_LOG);
f_table.insert("log10",F_LOG10);
f_table.insert("pow",F_POW);
f_table.insert("sin",F_SIN);
f_table.insert("sinh",F_SINH);
f_table.insert("sqrt",F_SQRT);
f_table.insert("tan",F_TAN);
f_table.insert("tanh",F_TANH);
(re,nil)=regex->compile(numbers, 0);
return nil;
}
uarray:= array[] of { EXCL, 0, 0, 0, MOD, BAND, 0, L_BRACE, R_BRACE, MUL,
ADD, COMMA, SUB, 0, DIV, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, COLON,
0, LT, EQ, GT, QUEST};
getTok(eat : int) : int {
val, s : string;
dec:=0;
s=text;
i:=0;
if (s==nil)
return EOS;
while(i<len s && (s[i]==' '||s[i]=='\t')) i++;
if (i==len s)
return EOS;
case s[i]{
'+' or '-' or '*' or '?' or '%' or '/' or '('
or ')' or ',' or ':' =>
if (eat)
text=s[i+1:];
return uarray[s[i]-'!'];
'~' =>
if (eat)
text=s[i+1:];
return TILDE;
'^' =>
if (eat)
text=s[i+1:];
return BEOR;
'&' =>
if (s[i+1]=='&'){
if (eat)
text=s[i+2:];
return LAND;
}
if (eat)
text=s[i+1:];
return BAND;
'|' =>
if (s[i+1]=='|'){
if (eat)
text=s[i+2:];
return LOR;
}
if (eat)
text=s[i+1:];
return BOR;
'!' =>
if (s[i+1]=='='){
if (eat)
text=s[i+2:];
return NEQ;
}
if (eat)
text=s[i+1:];
return EXCL;
'=' =>
if (s[i+1]!='=')
return UNKNOWN;
if (eat)
text=s[i+2:];
return EQ;
'>' =>
case s[i+1]{
'>' =>
if (eat)
text=s[i+2:];
return RSHIF;
'=' =>
if (eat)
text=s[i+2:];
return GEQ;
* =>
if (eat)
text=s[i+1:];
return GT;
}
'<' =>
case s[i+1]{
'<' =>
if (eat)
text=s[i+2:];
return LSHIF;
'=' =>
if (eat)
text=s[i+2:];
return LEQ;
* =>
if (eat)
text=s[i+1:];
return LT;
}
'0' =>
return oct_hex(eat);
'1' to '9'
or '.'=>
match:=regex->execute(re,s[i:]);
if (match != nil)
(i1, i2) := match[0];
if (match==nil || i1!=0)
sys->print("ARRG! non-number where number should be!");
if (eat)
text=s[i+i2:];
val=s[i:i+i2];
if (str->in('.',val) || str->in('e',val)
|| str->in('E',val)) {
r_val=real val;
return REAL;
}
i_val=int val;
return INT;
* =>
return get_func(eat);
}
return UNKNOWN;
}
oct_hex(eat : int) : int {
s:=text;
rest : string;
if (len s == 1){
i_val=0;
if (eat)
text=nil;
return INT;
}
if(s[1]=='x' || s[1]=='X'){
(i_val,rest)=str->toint(s[2:],16);
if (eat)
text = rest;
return INT;
}
if (s[1]=='.'){
match:=regex->execute(re,s);
if (match != nil)
(i1, i2) := match[0];
if (match==nil || i1!=0)
sys->print("ARRG!");
if (eat)
text=s[i2:];
val:=s[0:i2];
r_val=real val;
return REAL;
}
(i_val,rest)=str->toint(s[1:],8);
if (eat)
text = rest;
return INT;
}
get_func(eat : int) : int{
s:=text;
i:=0;
tok:=STRING;
while(i<len s && ((s[i]>='a' && s[i]<='z') ||
(s[i]>='A' && s[i]<='Z') ||
(s[i]>='0' && s[i]<='9') || (s[i]=='_'))) i++;
(found,val):=f_table.find(s[0:i]);
if (found)
tok=val;
else
s_val = s[0:i];
if (eat)
text = s[i:];
return tok;
}
exec(tcl: ref Tcl_Core->TclData,argv : array of string) : (int,string){
if (tcl==nil);
if (!started)
if ((msg:=init())!=nil)
return (1,msg);
retval : leaf;
expr:="";
for (i:=0;i<len argv;i++){
expr+=argv[i];
expr[len expr]=' ';
}
if (expr=="")
return (1,"Error!");
text=expr[0:len expr-1];
#sys->print("Text is %s\n",text);
retval = expr_9();
if (retval.which == UNKNOWN)
return (1,"Error!");
if (retval.which == INT)
return (0,string retval.i_val);
if (retval.which == STRING)
return (0,retval.s_val);
return (0,string retval.r_val);
}
expr_9() : leaf {
retval : leaf;
r1:=expr_8();
tok := getTok(0);
if(tok==QUEST){
getTok(1);
r2:=expr_8();
if (getTok(1)!=COLON)
r1.which=UNKNOWN;
r3:=expr_8();
if (r1.which == INT && r1.i_val==0)
return r3;
if (r1.which == INT && r1.i_val!=0)
return r2;
if (r1.which == REAL && r1.r_val==0.0)
return r3;
if (r1.which == REAL && r1.r_val!=0.0)
return r2;
retval.which=UNKNOWN;
return retval;
}
return r1;
}
expr_8() : leaf {
retval : leaf;
r1:=expr_7();
retval=r1;
tok := getTok(0);
if (tok == LOR){
getTok(1);
r2:=expr_7(); # start again?
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
retval.i_val=r1.i_val || r2.i_val;
return retval;
}
return retval;
}
expr_7() : leaf {
retval : leaf;
r1:=expr_6();
retval=r1;
tok := getTok(0);
if (tok == LAND){
getTok(1);
r2:=expr_6();
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
retval.i_val=r1.i_val && r2.i_val;
return retval;
}
return retval;
}
expr_6() : leaf {
retval : leaf;
r1:=expr_5();
retval=r1;
tok := getTok(0);
if (tok == BOR){
getTok(1);
r2:=expr_5();
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
retval.i_val=r1.i_val | r2.i_val;
return retval;
}
return retval;
}
expr_5() : leaf {
retval : leaf;
r1:=expr_4();
retval=r1;
tok := getTok(0);
if (tok == BEOR){
getTok(1);
r2:=expr_4();
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
retval.i_val=r1.i_val ^ r2.i_val;
return retval;
}
return retval;
}
expr_4() : leaf {
retval : leaf;
r1:=expr_3();
retval=r1;
tok := getTok(0);
if (tok == BAND){
getTok(1);
r2:=expr_3();
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
retval.i_val=r1.i_val & r2.i_val;
return retval;
}
return retval;
}
expr_3() : leaf {
retval : leaf;
r1:=expr_2();
retval=r1;
tok:=getTok(0);
if (tok==EQ || tok==NEQ){
retval.which=INT;
getTok(1);
r2:=expr_2();
if (r1.which==UNKNOWN || r2.which==UNKNOWN){
r1.which=UNKNOWN;
return r1;
}
if (tok==EQ){
case r1.which {
STRING =>
if (r2.which == INT)
retval.i_val =
(r1.s_val == string r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(r1.s_val == string r2.r_val);
else retval.i_val =
(r1.s_val == r2.s_val);
INT =>
if (r2.which == INT)
retval.i_val =
(r1.i_val == r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(real r1.i_val == r2.r_val);
else retval.i_val =
(string r1.i_val == r2.s_val);
REAL =>
if (r2.which == INT)
retval.i_val =
(r1.r_val == real r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(r1.r_val == r2.r_val);
else retval.i_val =
(string r1.r_val == r2.s_val);
}
}
else {
case r1.which {
STRING =>
if (r2.which == INT)
retval.i_val =
(r1.s_val != string r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(r1.s_val != string r2.r_val);
else retval.i_val =
(r1.s_val != r2.s_val);
INT =>
if (r2.which == INT)
retval.i_val =
(r1.i_val != r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(real r1.i_val != r2.r_val);
else retval.i_val =
(string r1.i_val != r2.s_val);
REAL =>
if (r2.which == INT)
retval.i_val =
(r1.r_val != real r2.i_val);
else if (r2.which == REAL)
retval.i_val =
(r1.r_val != r2.r_val);
else retval.i_val =
(string r1.r_val != r2.s_val);
}
}
return retval;
}
return retval;
}
expr_2() : leaf {
retval : leaf;
ar1,ar2 : real;
s1,s2 : string;
r1:=expr_1();
retval=r1;
tok:=getTok(0);
if (tok==LT || tok==GT || tok ==LEQ || tok==GEQ){
retval.which=INT;
getTok(1);
r2:=expr_1();
if (r1.which == STRING || r2.which == STRING){
if (r1.which==STRING)
s1=r1.s_val;
else if (r1.which==INT)
s1=string r1.i_val;
else s1= string r1.r_val;
if (r2.which==STRING)
s2=r2.s_val;
else if (r2.which==INT)
s2=string r2.i_val;
else s2= string r2.r_val;
case tok{
LT =>
retval.i_val = (s1<s2);
GT =>
retval.i_val = (s1>s2);
LEQ =>
retval.i_val = (s1<=s2);
GEQ =>
retval.i_val = (s1>=s2);
}
return retval;
}
if (r1.which==UNKNOWN || r2.which==UNKNOWN){
r1.which=UNKNOWN;
return r1;
}
if (r1.which == INT)
ar1 = real r1.i_val;
else
ar1 = r1.r_val;
if (r2.which == INT)
ar2 = real r2.i_val;
else
ar2 = r2.r_val;
case tok{
LT =>
retval.i_val = (ar1<ar2);
GT =>
retval.i_val = (ar1>ar2);
LEQ =>
retval.i_val = (ar1<=ar2);
GEQ =>
retval.i_val = (ar1>=ar2);
}
return retval;
}
return retval;
}
expr_1() : leaf {
retval : leaf;
r1:=expr0();
retval=r1;
tok := getTok(0);
if (tok == LSHIF || tok==RSHIF){
getTok(1);
r2:=expr0();
if (r1.which!=INT || r2.which!=INT){
retval.which = UNKNOWN;
return retval;
}
if (tok == LSHIF)
retval.i_val=r1.i_val << r2.i_val;
if (tok == RSHIF)
retval.i_val=r1.i_val >> r2.i_val;
return retval;
}
return retval;
}
expr0() : leaf {
retval : leaf;
r1:=expr1();
retval=r1;
tok := getTok(0);
while(tok==ADD || tok==SUB){
getTok(1);
r2:=expr1();
if (r1.which==UNKNOWN || r2.which==UNKNOWN){
r1.which=UNKNOWN;
return r1;
}
if (r2.which==r1.which){
case tok{
ADD =>
if (r1.which==INT)
r1.i_val+=r2.i_val;
else if (r1.which==REAL)
r1.r_val+=r2.r_val;
SUB =>
if (r1.which==INT)
r1.i_val-=r2.i_val;
else if (r1.which==REAL)
r1.r_val-=r2.r_val;
}
retval = r1;
}else{
retval.which = REAL;
ar1,ar2 : real;
if (r1.which==INT)
ar1= real r1.i_val;
else
ar1 = r1.r_val;
if (r2.which==INT)
ar2= real r2.i_val;
else
ar2 = r2.r_val;
if (tok==ADD)
retval.r_val = ar1+ar2;
if (tok==SUB)
retval.r_val = ar1-ar2;
}
tok=getTok(0);
}
return retval;
}
expr1() : leaf {
retval : leaf;
r1:=expr2();
retval=r1;
tok := getTok(0);
while(tok==MUL || tok==DIV || tok==MOD){
getTok(1);
r2:=expr2();
if (tok==MOD){
if (r1.which!=INT && r2.which!=INT){
r1.which=UNKNOWN;
return r1;
}
r1.i_val %= r2.i_val;
return r1;
}
if (r1.which==UNKNOWN || r2.which==UNKNOWN){
r1.which=UNKNOWN;
return r1;
}
if (r2.which==r1.which){
case tok{
MUL =>
if (r1.which==INT)
r1.i_val*=r2.i_val;
else if (r1.which==REAL)
r1.r_val*=r2.r_val;
DIV =>
if (r1.which==INT)
r1.i_val/=r2.i_val;
else if (r1.which==REAL)
r1.r_val/=r2.r_val;
}
retval = r1;
}else{
retval.which = REAL;
ar1,ar2 : real;
if (r1.which==INT)
ar1= real r1.i_val;
else
ar1 = r1.r_val;
if (r2.which==INT)
ar2= real r2.i_val;
else
ar2 = r2.r_val;
if (tok==MUL)
retval.r_val = ar1*ar2;
if (tok==DIV)
retval.r_val = ar1/ar2;
}
tok=getTok(0);
}
return retval;
}
expr2() : leaf {
tok := getTok(0);
if(tok==ADD || tok==SUB || tok==EXCL || tok==TILDE){
getTok(1);
r1:=expr2();
if (r1.which!=UNKNOWN)
case tok{
ADD =>
;
SUB =>
if (r1.which==INT)
r1.i_val=-r1.i_val;
else if (r1.which==REAL)
r1.r_val=-r1.r_val;
EXCL =>
if (r1.which != INT)
r1.which=UNKNOWN;
else
r1.i_val = !r1.i_val;
TILDE =>
if (r1.which != INT)
r1.which=UNKNOWN;
else
r1.i_val = ~r1.i_val;
}
else
r1.which = UNKNOWN;
return r1;
}
return expr5();
}
do_func(tok : int) : leaf {
retval : leaf;
r1,r2 : real;
ok : int;
retval.which=REAL;
case tok{
F_ACOS =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->acos(r1);
F_ASIN =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->asin(r1);
F_ATAN =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->atan(r1);
F_ATAN2 =>
(ok,r1,r2)=pars_rfunc(2);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->atan2(r1,r2);
F_CEIL =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->ceil(r1);
F_COS =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->cos(r1);
F_COSH =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->cosh(r1);
F_EXP =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->exp(r1);
F_FLOOR =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->floor(r1);
F_FMOD =>
(ok,r1,r2)=pars_rfunc(2);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->fmod(r1,r2);
F_HYPOT =>
(ok,r1,r2)=pars_rfunc(2);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->hypot(r1,r2);
F_LOG =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->log(r1);
F_LOG10 =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->log10(r1);
F_POW =>
(ok,r1,r2)=pars_rfunc(2);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->pow(r1,r2);
F_SIN =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->sin(r1);
F_SINH =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->sinh(r1);
F_SQRT =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->sqrt(r1);
F_TAN =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->tan(r1);
F_TANH =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->tanh(r1);
F_ABS =>
(ok,r1,r2)=pars_rfunc(1);
if (!ok){
retval.which=UNKNOWN;
return retval;
}
retval.r_val=math->fabs(r1);
* =>
sys->print("unexpected op %d\n", tok);
retval.which=UNKNOWN;
}
return retval;
}
pars_rfunc(args : int) : (int,real,real){
a1,a2 : real;
ok := 1;
if (getTok(0)!=L_BRACE)
ok=0;
getTok(1);
r1:=expr_9();
if (r1.which == INT)
a1 = real r1.i_val;
else if (r1.which == REAL)
a1 = r1.r_val;
else ok=0;
if(args==2){
if (getTok(0)!=COMMA)
ok=0;
getTok(1);
r2:=expr_9();
if (r2.which == INT)
a2 = real r2.i_val;
else if (r2.which == REAL)
a2 = r2.r_val;
else ok=0;
}
if (getTok(0)!=R_BRACE)
ok=0;
getTok(1);
return (ok,a1,a2);
}
expr5() : leaf {
retval : leaf;
tok:=getTok(1);
if (tok>=F_ABS && tok<=F_TANH)
return do_func(tok);
case tok{
STRING =>
retval.which = STRING;
retval.s_val = s_val;
INT =>
retval.which = INT;
retval.i_val = i_val;
REAL =>
retval.which = REAL;
retval.r_val = r_val;
R_BRACE or COMMA =>
return retval;
L_BRACE =>
r1:=expr_9();
if (getTok(1)!=R_BRACE)
r1.which=UNKNOWN;
return r1;
* =>
retval.which = UNKNOWN;
}
return retval;
}