?? compiler.cpp
字號:
return TRUE;
}
if (!r_ShiChanBiao()) return FALSE;
//yy
gen("call",1,leveltab[level].parnum,1,level,2,leveltab[level].lnp);
//yy end
return TRUE;
}
int CCompiler::r_ShiChanBiao()
{
//yy
int pp=yuyivalue.disp;
int parp=leveltab[pp].pointer;
int n=0;
int i,j,k,t;
//yy end
switch (GetCurSym()->type)
{
case 33://(
break;
default:
m_nErrorNum=16;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
NextSym();
if (!r_BiaoDaShi()) return FALSE;
//yy
if (n<=leveltab[pp].parnum)
{
i=yuyivalue.Etyp;
j=yuyivalue.Evalue;
switch (i)
{
case 1:
m_nErrorNum=36;
m_nErrorAddress=m_pCurSym;
return FALSE;
case 2:
k=temptab[j].taddr;
t=temptab[j].typ;
i++;
break;
default:
k=idtab[j].addr;
t=idtab[j].typ;
i++;
}
if ((i==3) && (idtab[parp].kind==4))
{
m_nErrorNum=37;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
if (t>idtab[parp].typ)
{
m_nErrorNum=35;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
gen("par",i,k,0,0,0,0);
if (i==3) temptab[j].used=FALSE;
n++;parp++;
}
//yy end
while (GetCurSym()->type==32)//,
{
NextSym();
if (!r_BiaoDaShi()) return FALSE;
//yy
if (n<=leveltab[pp].parnum)
{
i=yuyivalue.Etyp;
j=yuyivalue.Evalue;
switch (i)
{
case 1:
m_nErrorNum=36;
m_nErrorAddress=m_pCurSym;
return FALSE;
case 2:
k=temptab[j].taddr;
t=temptab[j].typ;
i++;
break;
default:
k=idtab[j].addr;
t=idtab[j].typ;
i++;
}
if ((i==3) && (idtab[parp].kind==4))
{
m_nErrorNum=37;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
if (t>idtab[parp].typ)
{
m_nErrorNum=35;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
gen("par",i,k,0,0,0,0);
if (i==3) temptab[j].used=FALSE;
n++;parp++;
}
//yy end
}
//yy
if (n<leveltab[pp].parnum)
{
m_nErrorNum=38;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
//yy end
switch (GetCurSym()->type)
{
case 34://)
break;
default:
m_nErrorNum=17;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
NextSym();
return TRUE;
}
int CCompiler::r_BiaoDaShi()
{
int i1,i2,j1,j2,t1,t2,k1,k2,i,j,t,k;
if (!r_Xiang()) return FALSE;
//yy
i=yuyivalue.Etyp;
j=yuyivalue.Evalue;
i1=i;j1=j;
switch (i1)
{
case 1:
t1=1;k1=j1;break;
case 2:
t1=temptab[j1].typ;
k1=temptab[j1].taddr;
break;
default :
t1=idtab[j1].typ;
k1=idtab[j1].addr;
}
//yy end
while (GetCurSym()->type==16)//+
{
NextSym();
if (!r_Xiang()) return FALSE;
//yy
i2=yuyivalue.Etyp;
j2=yuyivalue.Evalue;
switch (i2)
{
case 1:
t2=1;k2=j2;break;
case 2:
t2=temptab[j2].typ;
k2=temptab[j2].taddr;
break;
default :
t2=idtab[j2].typ;
k2=idtab[j2].addr;
}
t=(t1>t2)?t1:t2;
j=newtemp(t);
k=temptab[j].taddr;
if (i1==1)
if (i2==1)
gen("+I",1,j1,1,j2,3,k);
else
if (t2==1)
gen("+I",1,j1,i2+1,k2,3,k);
else
gen("+R",1,j1,i2+1,k2,3,k);
else
if (i2==1)
if (t1==1)
gen("+I",i1+1,k1,1,j2,3,k);
else
gen("+R",i1+1,k1,1,j2,3,k);
else
if ((t1==1) && (t2==1))
gen("+I",i1+1,k1,i2+1,k2,3,k);
else
gen("+R",i1+1,k1,i2+1,k2,3,k);
if (i1==2) temptab[j1].used=FALSE;
if (i2==2) temptab[j2].used=FALSE;
i=2;
i1=i;j1=j;t1=t;k1=k;
//yy end
}
//yy
yuyivalue.Etyp=i;
yuyivalue.Evalue=j;
//yy end
return TRUE;
}
int CCompiler::r_Xiang()
{
int i1,i2,j1,j2,t1,t2,k1,k2,i,j,t,k;
if (!r_YingZhi()) return FALSE;
//yy
i=yuyivalue.Etyp;
j=yuyivalue.Evalue;
i1=i;j1=j;
switch (i1)
{
case 1:
t1=1;k1=j1;break;
case 2:
t1=temptab[j1].typ;
k1=temptab[j1].taddr;
break;
default :
t1=idtab[j1].typ;
k1=idtab[j1].addr;
}
//yy end
while (GetCurSym()->type==18)//*
{
NextSym();
if (!r_YingZhi()) return FALSE;
//yy
i2=yuyivalue.Etyp;
j2=yuyivalue.Evalue;
switch (i2)
{
case 1:
t2=1;k2=j2;break;
case 2:
t2=temptab[j2].typ;
k2=temptab[j2].taddr;
break;
default :
t2=idtab[j2].typ;
k2=idtab[j2].addr;
}
t=(t1>t2)?t1:t2;
j=newtemp(t);
k=temptab[j].taddr;
if (i1==1)
if (i2==1)
gen("*I",1,j1,1,j2,3,k);
else
if (t2==1)
gen("*I",1,j1,i2+1,k2,3,k);
else
gen("*R",1,j1,i2+1,k2,3,k);
else
if (i2==1)
if (t1==1)
gen("*I",i1+1,k1,1,j2,3,k);
else
gen("*R",i1+1,k1,1,j2,3,k);
else
if ((t1==1) && (t2==1))
gen("*I",i1+1,k1,i2+1,k2,3,k);
else
gen("*R",i1+1,k1,i2+1,k2,3,k);
if (i1==2) temptab[j1].used=FALSE;
if (i2==2) temptab[j2].used=FALSE;
i=2;
i1=i;j1=j;t1=t;k1=k;
//yy end
}
//yy
yuyivalue.Etyp=i;
yuyivalue.Evalue=j;
//yy end
return TRUE;
}
int CCompiler::r_YingZhi()
{
int idlevel=yuyivar.currbl;//yy
int idpoint;//yy
switch (GetCurSym()->type)
{
case 1://id
//yy
idpoint=lookupv2(GetCurSym()->text,idlevel);
switch (idpoint)
{
case -1:
m_nErrorNum=34;
m_nErrorAddress=m_pCurSym;
return FALSE;
case 0:
m_nErrorNum=33;
m_nErrorAddress=m_pCurSym;
return FALSE;
default:
if (idlevel==yuyivar.currbl)
if (idtab[idpoint].kind==4) yuyivalue.Etyp=4;
else yuyivalue.Etyp=3;
else yuyivalue.Etyp=idlevel+5;
yuyivalue.Evalue=idpoint;
}
//yy end
NextSym();
break;
case 2://num
//yy
yuyivalue.Etyp=1;
yuyivalue.Evalue=GetCurSym()->value;
//yy end
NextSym();
break;
case 33://(
NextSym();
if (!r_BiaoDaShi()) return FALSE;
switch (GetCurSym()->type)
{
case 34://)
break;
default:
m_nErrorNum=17;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
NextSym();
break;
default:
m_nErrorNum=28;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
return TRUE;
}
int CCompiler::r_BuErBiaoDaShi()
{
int t;
int tc,fc;
switch (GetCurSym()->type)
{
case 20://~
NextSym();
if (!r_BuErBiaoDaShi()) return FALSE;
//yy
t=yuyivalue.TC;
yuyivalue.TC=yuyivalue.FC;
yuyivalue.FC=t;
//yy end
break;
case 33://(
case 1://id
case 2://num
if (!r_GuanXiBiaoDaShi()) return FALSE;
//yy
tc=yuyivalue.TC;
fc=yuyivalue.FC;
//yy end
while (GetCurSym()->type==21 || GetCurSym()->type==22)
{
if (GetCurSym()->type==21)//&
{
NextSym();
backpatch(tc,4,2,yuyivar.nxq);//yy
if (!r_BuErBiaoDaShi()) return FALSE;
tc=yuyivalue.TC;//yy
fc=merge(fc,yuyivalue.FC,4);//yy
}
else //|
{
NextSym();
backpatch(fc,4,2,yuyivar.nxq);//yy
if (!r_BuErBiaoDaShi()) return FALSE;
fc=yuyivalue.FC;//yy
tc=merge(tc,yuyivalue.TC,4);//yy
}
}
//yy
yuyivalue.TC=tc;
yuyivalue.FC=fc;
//yy end
break;
default:
m_nErrorNum=29;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
return TRUE;
}
int CCompiler::r_GuanXiBiaoDaShi()
{
int i1,i2,j1,j2,t1,t2,k1,k2,rop;
if (!r_BiaoDaShi()) return FALSE;
//yy
i1=yuyivalue.Etyp;
j1=yuyivalue.Evalue;
switch (i1)
{
case 1:
t1=1,k1=j1;break;
case 2:
t1=temptab[j1].typ;
k1=temptab[j1].taddr;
break;
default:
t1=idtab[j1].typ;
k1=idtab[j1].addr;
}
//yy end
if (!r_GuanXi()) return FALSE;
rop=yuyivalue.Code;//yy
if (!r_BiaoDaShi()) return FALSE;
//yy
i2=yuyivalue.Etyp;
j2=yuyivalue.Evalue;
switch (i2)
{
case 1:
t2=1,k2=j2;break;
case 2:
t2=temptab[j2].typ;
k2=temptab[j2].taddr;
break;
default:
t2=idtab[j2].typ;
k2=idtab[j2].addr;
}
if ((t1!=1) || (t2!=1))
{
m_nErrorNum=39;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
yuyivalue.TC=yuyivar.nxq;
if (i1!=1) i1++;
if (i2!=1) i2++;
gen(m_QuadOpCodeTable[rop],i1,k1,i2,k2,0,0);
yuyivalue.FC=yuyivar.nxq;
gen("j",0,0,0,0,0,0);
if (i1==3) temptab[j1].used=FALSE;
if (i2==3) temptab[j2].used=FALSE;
//yy end
return TRUE;
}
int CCompiler::r_GuanXi()
{
switch (GetCurSym()->type)
{
case 23://<
case 24://<=
case 25://>
case 26://>=
case 27://=
case 28://<>
break;
default:
m_nErrorNum=30;
m_nErrorAddress=m_pCurSym;
return FALSE;
}
//yy
yuyivalue.Code=GetCurSym()->type-11;
//yy end
NextSym();
return TRUE;
}
void CCompiler::gen(char * op,int a1,int a2,int a3,int a4,int a5,int a6)
{
if (yuyivar.nxq>=QUAD_TABLE_LEN-1) return;
int r=29;
for (int i=0;i<QUAD_OPCODE_TABLE_LEN;i++)
{
if (!::stricmp(m_QuadOpCodeTable[i],op))
{
r=i;break;
}
}
quad[yuyivar.nxq].op=r;
quad[yuyivar.nxq].arg1.fl=a1;
quad[yuyivar.nxq].arg1.flvalue=a2;
quad[yuyivar.nxq].arg2.fl=a3;
quad[yuyivar.nxq].arg2.flvalue=a4;
quad[yuyivar.nxq].result.fl=a5;
quad[yuyivar.nxq].result.flvalue=a6;
yuyivar.nxq++;
}
void CCompiler::addid(char * name, int typ, int kind, int addr)
{
if (yuyivar.lasent>=ID_TABLE_LEN-1) return;
::strcpy(idtab[yuyivar.lasent].name,name);
idtab[yuyivar.lasent].typ=typ;
idtab[yuyivar.lasent].kind=kind;
idtab[yuyivar.lasent].addr=addr;
yuyivar.lasent++;
}
void CCompiler::backpatch(int link, int point, int v1, int v2)
{
if (link==0) return;
switch (point)
{
case 2:
backpatch(quad[link].arg1.fl,point,v1,v2);
quad[link].arg1.fl=v1;
quad[link].arg1.flvalue=v2;
break;
case 3:
backpatch(quad[link].arg2.fl,point,v1,v2);
quad[link].arg2.fl=v1;
quad[link].arg2.flvalue=v2;
break;
case 4:
backpatch(quad[link].result.fl,point,v1,v2);
quad[link].result.fl=v1;
quad[link].result.flvalue=v2;
break;
default:
return;
}
}
int CCompiler::lookupv(char * idname, int idlevel)
{
if (!::stricmp(idname,leveltab[idlevel].name)) return -1;
int n=leveltab[idlevel].varnum+leveltab[idlevel].parnum;
int pointer=leveltab[idlevel].pointer;
for (int i=pointer;i<(pointer+n);i++)
if (!::stricmp(idname,idtab[i].name)) return i;
return 0;
}
int CCompiler::lookupp(char * id)
{
for (int i=0;i<yuyivar.lastbl;i++)
if (!::stricmp(id,leveltab[i].name)) return i;
return -1;
}
int CCompiler::newtemp(int t)
{
for (int i=leveltab[yuyivar.currbl].temp;i<yuyivar.tempp;i++)
if ((temptab[i].used==0) && (temptab[i].typ==t))
{
temptab[i].used=1;
return i;
}
temptab[yuyivar.tempp].used=1;
temptab[yuyivar.tempp].typ=t;
temptab[yuyivar.tempp].taddr=leveltab[yuyivar.currbl].recl;
leveltab[yuyivar.currbl].recl+=t;
leveltab[yuyivar.currbl].temp++;
return yuyivar.tempp++;
}
int CCompiler::merge(int link1, int link2, int p)
{
if (link1==0) return link2;
int a=link1;
int b;
while (1)
{
switch (p)
{
case 2:
b=quad[a].arg1.fl;
break;
case 3:
b=quad[a].arg2.fl;
break;
case 4:
b=quad[a].result.fl;
break;
default:
b=0;
}
if (b==0)
{
switch (p)
{
case 2:
quad[a].arg1.fl=link2;
break;
case 3:
quad[a].arg2.fl=link2;
break;
case 4:
quad[a].result.fl=link2;
break;
default :
;
}
return link1;
}
else
{
a=b;
}
}
}
int CCompiler::lookupv2(char * name, int & level)
{
int i=level;
int r;
while(1)
{
if (i<0) return 0;
r=lookupv(name,i);
switch (r)
{
case -1:
level=i;
return -1;
case 0:
i--;
break;
default:
level=i;
return r;
}
}
}
InterfaceType * CCompiler::GetTable()
{
return &m_Interface;
}
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