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implement Tcl_Stack;
include "sys.m";
sys : Sys;
include "draw.m";
include "tk.m";
include "tcl.m";
include "tcllib.m";
include "utils.m";
htab: Str_Hashtab;
shtab: Sym_Hashtab;
Hash: import htab;
SHash: import shtab;
sframe : adt {
simple : ref Hash;
assoc : array of (ref Hash,string);
symtab : ref SHash;
};
stack := array[100] of sframe;
curlevel : int;
nlev : int;
init() {
curlevel=-1;
nlev=-1;
htab = load Str_Hashtab Str_Hashtab->PATH;
shtab = load Sym_Hashtab Sym_Hashtab->PATH;
sys = load Sys Sys->PATH;
if (htab == nil){
sys->print("can't load Hashtab %r\n");
exit;
}
if (shtab == nil){
sys->print("can't load Sym_Hashtab %r\n");
exit;
}
}
newframe() : (ref Hash,array of (ref Hash,string),ref SHash) {
nv := htab->alloc(101);
av := array[100] of (ref Hash,string);
st := shtab->alloc(101);
#sys->print("New frame, curlevel is %d\n",curlevel);
push (nv,av,st);
return (nv,av,st);
}
level() : int {
return curlevel;
}
move(lev :int) : int {
if (lev <0 || lev>nlev)
return 0;
curlevel=lev;
return 1;
}
push(sv : ref Hash, av : array of (ref Hash,string), st :ref SHash){
curlevel++;
nlev++;
stack[curlevel].simple=sv;
stack[curlevel].assoc=av;
stack[curlevel].symtab=st;
}
pop() : (ref Hash,array of (ref Hash,string),ref SHash) {
s:=stack[curlevel].simple;
a:=stack[curlevel].assoc;
t:=stack[curlevel].symtab;
stack[curlevel].simple=nil;
stack[curlevel].assoc=nil;
stack[curlevel].symtab=nil;
curlevel--;
nlev--;
return (s,a,t);
}
examine(lev : int) : (ref Hash,array of (ref Hash,string),ref SHash) {
if (lev <0 || lev > nlev)
return (nil,nil,nil);
return (stack[lev].simple,stack[lev].assoc,stack[lev].symtab);
}
dump() {
for (i:=0;i<100;i++){
if (stack[i].simple!=nil){
sys->print("simple table at %d\n",i);
for (j:=0;j<101;j++)
if (stack[i].simple.tab[j]!=nil){
sys->print("\tH_link at %d\n",j);
l:=stack[i].simple.tab[j];
while(l!=nil){
sys->print("\tname [%s], value [%s]\n",
(hd l).name,(hd l).val);
l=tl l;
}
}
}
if (stack[i].assoc!=nil){
sys->print("assoc table at %d\n",i);
for(j:=0;j<100;j++){
(rh,s):=stack[i].assoc[j];
if (rh!=nil){
sys->print(
"\tassoc array at %d, name %s\n",
j,s);
for (k:=0;k<101;k++)
if (rh.tab[k]!=nil){
sys->print(
"\t\tH_link at %d\n",k);
l:=rh.tab[k];
while(l!=nil){
sys->print(
"\t\tname [%s], value [%s]\n",
(hd l).name,(hd l).val);
l=tl l;
}
}
}
}
}
if (stack[i].symtab!=nil){
sys->print("Symbol table at %d\n",i);
for (j:=0;j<101;j++)
if (stack[i].symtab.tab[j]!=nil){
sys->print("\tH_link at %d\n",j);
l:=stack[i].symtab.tab[j];
while(l!=nil){
sys->print("\tname [%s], alias [%s], "+
"value [%d]\n",(hd l).name,
(hd l).alias,(hd l).val);
l=tl l;
}
}
}
}
}
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