source: git/Singular/blackbox.cc

#include "kernel/mod2.h"

#include "Singular/tok.h"
#include "Singular/subexpr.h"
#include "Singular/ipshell.h"
#include "Singular/ipid.h"

#include "Singular/blackbox.h"

#define MAX_BB_TYPES 256
// #define BLACKBOX_DEVEL 1

GLOBAL_VAR static blackbox* blackboxTable[MAX_BB_TYPES];
GLOBAL_VAR static char *    blackboxName[MAX_BB_TYPES];
GLOBAL_VAR static int blackboxTableCnt=0;
#define BLACKBOX_OFFSET (MAX_TOK+1)
blackbox* getBlackboxStuff(const int t)
{
  if (t>MAX_TOK)  /*MAX_TOK+1 is BLACKBOX_OFFSET*/
    return (blackboxTable[t-BLACKBOX_OFFSET]);
  else
    return NULL;
}


void blackbox_default_destroy(blackbox */*b*/, void */*d*/)
{
  WerrorS("missing blackbox_destroy");
}
char *blackbox_default_String(blackbox */*b*/,void */*d*/)
{
  WerrorS("missing blackbox_String");
  return omStrDup("");
}
void *blackbox_default_Copy(blackbox */*b*/,void */*d*/)
{
  WerrorS("missing blackbox_Copy");
  return NULL;
}
BOOLEAN blackbox_default_Assign(leftv l, leftv r)
{
  int lt=l->Typ();
  blackbox* b=getBlackboxStuff(lt);
  if ((lt==r->Typ())
  && (l->Data()!=r->Data()))
  {
    b->blackbox_destroy(b,(void*)l->Data());
    if (l->rtyp==IDHDL)
      IDDATA((idhdl)l->data)=(char*)b->blackbox_Copy(b,r->Data());
    else
      l->data=b->blackbox_Copy(b,r->Data());
  }
  return FALSE;
}
void blackbox_default_Print(blackbox *b,void *d)
{
  char *s=b->blackbox_String(b,d);
  PrintS(s);
  omFree(s);
}
void *blackbox_default_Init(blackbox */*b*/)
{
  return NULL;
}

BOOLEAN blackbox_default_serialize(blackbox */*b*/, void */*d*/, si_link /*f*/)
{
  WerrorS("blackbox_serialize is not implemented");
  return TRUE;
}

BOOLEAN blackbox_default_deserialize(blackbox **/*b*/, void **/*d*/, si_link /*f*/)
{
  WerrorS("blackbox_deserialize is not implemented");
  return TRUE;
}

BOOLEAN blackboxDefaultOp1(int op,leftv l, leftv r)
{
  if (op==TYPEOF_CMD)
  {
    l->data=omStrDup(getBlackboxName(r->Typ()));
    l->rtyp=STRING_CMD;
    return FALSE;
  }
  else if (op==NAMEOF_CMD)
  {
    if (r->name==NULL) l->data=omStrDup("");
    else               l->data=omStrDup(r->name);
    l->rtyp=STRING_CMD;
    return FALSE;
  }

  return TRUE;
}

BOOLEAN blackboxDefaultOp2(int /*op*/,leftv /*l*/, leftv /*r1*/, leftv /*r2*/)
{
  return TRUE;
}

BOOLEAN blackboxDefaultOp3(int /*op*/,leftv /*l*/, leftv /*r1*/,leftv /*r2*/, leftv /*r3*/)
{
  return TRUE;
}

BOOLEAN blackboxDefaultOpM(int op,leftv res, leftv args)
{
  if (op==LIST_CMD)
  {
    res->rtyp=LIST_CMD;
    BOOLEAN bo=jjLIST_PL(res,args);
    args->CleanUp();
    return bo;
  }
  else if(op==STRING_CMD)
  {
    blackbox *b=getBlackboxStuff(args->Typ());
    res->data=b->blackbox_String(b,args->Data());
    res->rtyp=STRING_CMD;
    args=args->next;
    if(args!=NULL)
    {
      sleftv res2;
      int ret=iiExprArithM(&res2,args,op);
      if (ret) return TRUE;
      size_t len=strlen((char*)res->data)+strlen((char*)res2.data)+1;
      char *s2=(char*)omAlloc(len);
      snprintf(s2,len,"%s%s",(char*)res->data,(char*)res2.data);
      omFree(res2.data);
      omFree(res->data);
      res->data=s2;
    }
    return FALSE;
  }
  return TRUE;
}

BOOLEAN blackbox_default_Check(blackbox *,leftv,leftv)
{
  return FALSE;
}
int setBlackboxStuff(blackbox *bb, const char *n)
{
  int where = -1;
  for (int i=0;i<MAX_BB_TYPES;i++)
  {
    if (blackboxTable[i]!=NULL && strcmp(blackboxName[i],n)==0) {
      where = i;
      break;
    }
  }
  if (where < 0) {
    if (MAX_BB_TYPES<=blackboxTableCnt)
    {
      // second try, find empty slot from removed bb:
      for (int i=0;i<MAX_BB_TYPES;i++)
      {
        if (blackboxTable[i]==NULL) { where=i; break; }
      }
    }
    else
    {
      where=blackboxTableCnt;
      blackboxTableCnt++;
    }
  }
  if (where==-1)
  {
    WerrorS("too many bb types defined");
    return 0;
  }
  else
  {
    // check for alreday defined bb:
    for (int i=0;i<MAX_BB_TYPES;i++)
    {
      if ((blackboxName[i]!=NULL) && (strcmp(blackboxName[i],n)==0))
      {
        Warn("not redefining blackbox type %s (%d)",n,i+BLACKBOX_OFFSET);
        return 0;
      }
    }
    blackboxTable[where]=bb;
    blackboxName[where]=omStrDup(n);
#ifdef BLACKBOX_DEVEL
    Print("setBlackboxStuff: define bb:name=%s:rt=%d (table:cnt=%d)\n",blackboxName[where],where+BLACKBOX_OFFSET,where);
#endif
    if (bb->blackbox_destroy==NULL) bb->blackbox_destroy=blackbox_default_destroy;
    if (bb->blackbox_String==NULL)  bb->blackbox_String=blackbox_default_String;
    if (bb->blackbox_Print==NULL)   bb->blackbox_Print=blackbox_default_Print;
    if (bb->blackbox_Init==NULL)    bb->blackbox_Init=blackbox_default_Init;
    if (bb->blackbox_Copy==NULL)    bb->blackbox_Copy=blackbox_default_Copy;
    if (bb->blackbox_Assign==NULL)  bb->blackbox_Assign=blackbox_default_Assign;
    if (bb->blackbox_Op1==NULL)     bb->blackbox_Op1=blackboxDefaultOp1;
    if (bb->blackbox_Op2==NULL)     bb->blackbox_Op2=blackboxDefaultOp2;
    if (bb->blackbox_Op3==NULL)     bb->blackbox_Op3=blackboxDefaultOp3;
    if (bb->blackbox_OpM==NULL)     bb->blackbox_OpM=blackboxDefaultOpM;
    if (bb->blackbox_CheckAssign==NULL) bb->blackbox_CheckAssign=blackbox_default_Check;
    if (bb->blackbox_serialize==NULL) bb->blackbox_serialize=blackbox_default_serialize;
    if (bb->blackbox_deserialize==NULL) bb->blackbox_deserialize=blackbox_default_deserialize;
    return where+BLACKBOX_OFFSET;
  }
}

void removeBlackboxStuff(const int rt)
{
  omfree(blackboxTable[rt-BLACKBOX_OFFSET]);
  omfree(blackboxName[rt-BLACKBOX_OFFSET]);
  blackboxTable[rt-BLACKBOX_OFFSET]=NULL;
  blackboxName[rt-BLACKBOX_OFFSET]=NULL;
}
const char *getBlackboxName(const int t)
{
 char *b=blackboxName[t-BLACKBOX_OFFSET];
  if (b!=NULL) return b;
  else         return "";
}
int blackboxIsCmd(const char *n, int & tok)
{
  for(int i=blackboxTableCnt-1;i>=0;i--)
  {
    if(strcmp(n,blackboxName[i])==0)
    {
#ifdef BLACKBOX_DEVEL
      Print("blackboxIsCmd: found bb:%s:%d (table:%d)\n",n,i+BLACKBOX_OFFSET,i);
#endif
      tok=i+BLACKBOX_OFFSET;
      return ROOT_DECL;
    }
  }
  tok=0;
  return 0;
}

void printBlackboxTypes()
{
  for(int i=blackboxTableCnt-1;i>=0;i--)
  {
    if (blackboxName[i]!=NULL)
       Print("type %d: %s\n",i,blackboxName[i]);
  }
}

struct blackbox_list *getBlackboxTypes()
{
        int i = 0;
        void **l = (void **)omalloc0(blackboxTableCnt * sizeof(void *));
        struct blackbox_list *list_struct = (struct blackbox_list *) omAlloc0(sizeof(struct blackbox_list));
        list_struct->count = blackboxTableCnt;
        list_struct->list = l;

        for (i = blackboxTableCnt-1; i >= 0 ;i--)
        {
                if (blackboxName[i]!=NULL) {
                        l[i] = (void *)omStrDup(blackboxName[i]);
                        //Print("type %d: %s\n",i,blackboxName[i]);
                } else {
                        l[i] = NULL;
                }
        }
        return list_struct;
}