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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <thread.h>
#include "apl9.h"
ErrorGuard *
newerrorguard(Array *codes, Statement *guard)
{
ThreadData *td = getthreaddata();
DfnFrame *fr = getcurrentdfn();
ErrorGuard *eg = emallocz(sizeof(ErrorGuard), 1);
eg->active = 1;
eg->guard = guard;
if(fr == nil)
td->globalerrorguard = eg;
else{
eg->next = fr->errorguards;
fr->errorguards = eg;
eg->frame = dupdfnframe(fr);
}
for(int i = 0; i < codes->size; i++)
eg->code |= (1<<codes->intdata[i]);
return eg;
}
void
throwerror(Rune *msg, int err)
{
ThreadData *td = getthreaddata();
ErrorGuard *matching = td->globalerrorguard;
DfnFrame *frame = getcurrentdfn();
td->lasterror = err;
if(td->lasterrormsg)
free(td->lasterrormsg);
td->lasterrormsg = msg ? runestrdup(msg) : nil;
while(frame != nil){
for(ErrorGuard *eg = frame->errorguards; eg != nil; eg = eg->next){
if(!eg->active)
continue;
if(((1<<err) & eg->code) || (eg->code == 1)){
matching = eg;
goto match;
}
}
frame = frame->prev;
popdfnframe();
}
match:
longjmp(matching->jmp, 1);
}
Rune *
errorstr(int code)
{
Rune *err;
switch(code){
case ESyntax: err = L"SYNTAX ERROR"; break;
case EIndex: err = L"INDEX ERROR"; break;
case ERank: err = L"RANK ERROR"; break;
case ELength: err = L"LENGTH ERROR"; break;
case EValue: err = L"VALUE ERROR"; break;
case EDomain: err = L"DOMAIN ERROR"; break;
case ETimeout: err = L"TIMEOUT ERROR"; break;
case EStack: err = L"STACK OVERFLOW"; break;
case ENotImplemented: err = L"NOT IMPLEMENTED"; break;
default: err = L""; break;
}
return err;
}
void
displayerror(void)
{
ThreadData *td = getthreaddata();
Array *error = allocarray(AtypeArray, 1, 3);
error->shape[0] = 3;
error->arraydata[0] = mkrunearray(errorstr(td->lasterror));
error->arraydata[1] = mkrunearray(td->lasterrormsg ? td->lasterrormsg : L"");
error->arraydata[2] = fnSame(td->name);
rundfn(L"0::⎕RAWIO←⍵ ⋄ ('!' ⍵) ⍈ ⎕SESSION", nil, nil, nil, error);
freearray(error);
}
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