FILE *op_pool(char *name)
{
char buf[LN_buf+1];
name_pooldir(buf);
strcat(buf,name);
return !fchk(buf,"ab")?NULL:fopr(buf);
}
void flblcompile(FILE *finp,FILE *flbl,char inp[], char op[], int* z) {
int a,b;
while(!feof(finp)) {
fscanf(finp,"%s",inp);
if((strcasecmp(inp,"JMP")==0)||(strcasecmp(inp,"JC")==0)||(strcasecmp(inp,"JNC")==0)||(strcasecmp(inp,"JZ")==0)||(strcasecmp(inp,"JNZ")==0)||(strcasecmp(inp,"JP")==0)||(strcasecmp(inp,"JM")==0)||(strcasecmp(inp,"JPE")==0)||(strcasecmp(inp,"JPO")==0)) {
fchk(finp,flbl,inp,op,&b);
if(b==0) {
printf("\n%s Label not found!\n\nAvailable declared labels are:-\n",inp);
z=0;
fprt(flbl);
}
}
}
rewind(finp);
}
void regnerr(FILE *finp,FILE *freg,char inp[],int icnt, int* chk) {
int flag=0;
char c,stray[17],op[17],org[17];
strcpy(stray,inp);
if(((inp[0]=='r'||inp[0]=='R')&&(inp[1]>47&&inp[1]<58))||(strcasecmp(inp,",")==0)||(strcasecmp(inp,".")==0)) {
c=stray[strlen(stray)-1];
if (c<48 || c>57) {
stray[strlen(stray)-1]='\0';
rewind(freg);
while(!feof(freg)) {
fscanf(freg,"%s",op);
if(strcasecmp(stray,op)==0) {
fscanf(freg,"%s",op);
flag=1; break;
} else {
fscanf(freg,"%s",op);
flag=0;
}
}
}
if (flag==1) {
printf("\nLine %d: Invalid character found after %s.\n",icnt,stray);
}
else if((strcasecmp(inp,",")==0)||(strcasecmp(inp,".")==0)) {
fseek(finp,-(strlen(inp)+4),SEEK_CUR);
fscanf(finp,"%s",inp);
strcpy(org,inp);
fscanf(finp,"%s",inp);
printf("\nLine %d: Invalid character found after %s. '%s' not allowed between instructions.\n",icnt,org,inp);
fchk(finp,freg,inp,op,&flag);
if(flag==0) regnerr(finp,freg,inp,icnt,chk);
}
else {
printf("\nLine %d: %s Register not found!\n\nAvailable registers are:-\n",icnt,inp);
fprt(freg);
}
}
else *chk=0;
}
int fcompile(FILE *finp,FILE *fout,FILE *fopc,FILE *freg,FILE *fhex,FILE *flbl,FILE *fhlp,char inp[17],char op[17],int* z) {
int a,b,c,d,e,f,g,i=0,icnt=0;
*z=1;
char inpp[17];
rewind(finp);
while(!feof(finp)) {
rewind(fopc);
fscanf(finp,"%s",inp);
fseek(fhlp,0,SEEK_SET);
while(!feof(fopc)) {
fscanf(fopc,"%s",op);
if(strcasecmp(inp,op)==0) {
fscanf(fopc,"%s",op);
a=1; break;
} else {
i=0;
while(i<strlen(inp)) {
inp[i]=toupper(inp[i]);
i++;
}
if ((strstr(inp,op)!=0)||(strstr(op,inp)!=0)) {
fprintf(fhlp, "\n%s %s",op,inp);
}
fscanf(fopc,"%s",op);
a=0;
}
}
if(icnt==0 && (strcasecmp(inp,"start")!=0)) {
fprintf(fout, "%s", "\n1111111111101111");
printf("\nLINE 0: 'START' instruction not found at beginning of input\n");
icnt++;
}
if(icnt==1 && (strcasecmp(inp,"rst")!=0)) {
fprintf(fout, "%s", "\n1111111111101110");
printf("\nLINE 0: 'RST' instruction not found at beginning of input following START\n");
icnt++;
}
if(a==0) {
if(inp[strlen(inp)-1]==':') {
inp[strlen(inp)-1]='\0';
rewind(flbl);
while(!feof(flbl)) {
fscanf(flbl,"%s",op);
if(strcasecmp(inp,op)==0) {
fscanf(flbl,"%s",op);
d=1; break;
} else {
fscanf(flbl,"%s",op);
d=0;
}
}
if(d==1) {
printf("\nLine %d: Label '%s' already declared earlier!\n",icnt+1,inp);
*z=0;
}
else {
fprintf(flbl,"\n%s ",inp);
dec2bin(flbl, icnt+1);
}
continue;
}
strcpy(inpp,inp);
fscanf(finp,"%s",inp);
if(strcasecmp(inp,":")==0) {
printf("\nLine %d: Incorrect syntax for label declaration. Space between 'label_Name' and ':' not allowed.",icnt+1);
*z=0;
}
else {
fseek(finp,-strlen(inp)-1,SEEK_CUR);
strcpy(inp,inpp);
if(inp[1]>47&&inp[1]<58) printf("\nLine %d: INVALID Instruction\n",icnt);
else {
printf("\nLine %d: '%s' Instruction not found!\n\nAvailable options are:-\n",icnt+1,inp);
fprt(fhlp);
//-------------------------------------------------------
}
*z=0; return 0;
}
}
else {
icnt++;
if((strcasecmp(inp,"JMP")==0)||(strcasecmp(inp,"JC")==0)||(strcasecmp(inp,"JNC")==0)||(strcasecmp(inp,"JZ")==0)||(strcasecmp(inp,"JNZ")==0)||(strcasecmp(inp,"JP")==0)||(strcasecmp(inp,"JM")==0)||(strcasecmp(inp,"JPE")==0)||(strcasecmp(inp,"JPO")==0)) {
fscanf(finp,"%s",inp);
}
else if(strlen(op)==4){
fchk(finp,freg,inp,op,&b);
if(b==0) regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
fchk(finp,freg,inp,op,&e);
if(e==0) regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
fchk(finp,freg,inp,op,&f);
if(f==0) regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
if(b==0||e==0||f==0) *z=0;
}
else if(strlen(op)==8){
fchk(finp,freg,inp,op,&b);
if(b==0) regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
fchk(finp,freg,inp,op,&e);
if(e==0) regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
if(b==0||e==0) *z=0;
}
else if(strlen(op)==12){
char ins[17];
strcpy(ins,inp);
fchk(finp,freg,inp,op,&b);
if(b==0) {
regnerr(finp,freg,inp,icnt,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
*z=0;
}
if((ins[strlen(ins)-1]=='i')||(ins[strlen(ins)-1]=='I')){
fchk(finp,fhex,inp,op,&c);
strcpy(inpp,inp);
if(c==1) icnt++;
else {
fchk(finp,fhex,inp,op,&g);
if(g==0) {
printf("\nLINE %d: INVALID Instruction\n",icnt);
*z=0; return 0;
}
fseek(finp,-strlen(inp)-1,SEEK_CUR);
strcpy(inp,inpp);
printf("\nLine %d: '%s' Invalid Value!\n\nPlease input the value in hexadecimal in range (0,FFFF)\n",icnt,inp);
*z=0;
}
}
}
}
}
if(strcasecmp(inp,"HLT")!=0) {
printf("\nCheck whether you have included 'HLT' at the end of your program or your source code is not EMPTY.\n");
*z=0;
}
rewind(finp);
return icnt;
}