static void handle_equ(char *s)
{
char *labname;
symbol *label;
if(!(labname=parse_identifier(&s))){
syntax_error(10); /* identifier expected */
return;
}
s=skip(s);
if(*s!=',')
syntax_error(9);
else
s=skip(s+1);
label=new_abs(labname,parse_expr_tmplab(&s));
myfree(labname);
eol(s);
}
int main(int argc,char **argv)
{
int i;
for(i=1; i<argc; i++) {
if(argv[i][0]=='-'&&argv[i][1]=='F') {
output_format=argv[i]+2;
argv[i][0]=0;
}
if(!strcmp("-quiet",argv[i])) {
verbose=0;
argv[i][0]=0;
}
}
if(!init_output(output_format))
general_error(16,output_format);
if(!init_main())
general_error(10,"main");
if(verbose)
printf("%s\n%s\n%s\n%s\n",copyright,cpu_copyright,syntax_copyright,output_copyright);
for(i=1; i<argc; i++) {
if(argv[i][0]==0)
continue;
if(argv[i][0]!='-') {
if(inname)
general_error(11);
inname=argv[i];
continue;
}
if(!strcmp("-o",argv[i])&&i<argc-1) {
if(outname)
general_error(28,'o');
outname=argv[++i];
continue;
}
if(!strcmp("-L",argv[i])&&i<argc-1) {
if(listname)
general_error(28,'L');
listname=argv[++i];
produce_listing=1;
continue;
}
if(!strcmp("-Lnf",argv[i])) {
listformfeed=0;
continue;
}
if(!strcmp("-Lns",argv[i])) {
listnosyms=1;
continue;
}
if(!strncmp("-Ll",argv[i],3)) {
sscanf(argv[i]+3,"%i",&listlinesperpage);
continue;
}
if(!strncmp("-D",argv[i],2)) {
char *def=NULL;
expr *val;
if(argv[i][2])
def=&argv[i][2];
else if (i<argc-1)
def=argv[++i];
if(def) {
char *s=def;
if(ISIDSTART(*s)) {
s++;
while(ISIDCHAR(*s))
s++;
def=cnvstr(def,s-def);
if(*s=='=') {
s++;
val=parse_expr(&s);
}
else
val=number_expr(1);
if(*s)
general_error(23,'D'); /* trailing garbage after option */
new_abs(def,val);
myfree(def);
continue;
}
}
}
if(!strncmp("-I",argv[i],2)) {
char *path=NULL;
if(argv[i][2])
path=&argv[i][2];
else if (i<argc-1)
path=argv[++i];
if(path) {
new_include_path(path);
continue;
}
}
if(!strcmp("-unnamed-sections",argv[i])) {
unnamed_sections=1;
continue;
}
if(!strcmp("-ignore-mult-inc",argv[i])) {
ignore_multinc=1;
continue;
}
if(!strcmp("-nocase",argv[i])) {
nocase=1;
continue;
}
if(!strcmp("-noesc",argv[i])) {
esc_sequences=0;
continue;
}
if(!strcmp("-nosym",argv[i])) {
no_symbols=1;
continue;
}
if(!strncmp("-nowarn=",argv[i],8)) {
int wno;
sscanf(argv[i]+8,"%i",&wno);
disable_warning(wno);
continue;
}
else if(!strcmp("-w",argv[i])) {
no_warn=1;
continue;
}
if(!strncmp("-maxerrors=",argv[i],11)) {
sscanf(argv[i]+11,"%i",&max_errors);
continue;
}
else if(!strcmp("-pic",argv[i])) {
pic_check=1;
continue;
}
if(cpu_args(argv[i]))
continue;
if(syntax_args(argv[i]))
continue;
if(output_args(argv[i]))
continue;
if (!strncmp("-x",argv[i],2)) {
auto_import=0;
continue;
}
general_error(14,argv[i]);
}
if(inname) {
setfilename(inname);
setdebugname(inname);
include_source(inname);
} else
general_error(15);
if(!init_parse())
general_error(10,"parse");
if(!init_syntax())
general_error(10,"syntax");
if(!init_cpu())
general_error(10,"cpu");
parse();
if(errors==0||produce_listing)
resolve();
if(errors==0||produce_listing)
assemble();
if(errors==0&&!auto_import)
undef_syms();
if(!listname)
listname="a.lst";
if(produce_listing)
write_listing(listname);
if(!outname)
outname="a.out";
if(errors==0) {
if(verbose)
statistics();
outfile=fopen(outname,"wb");
if(!outfile)
general_error(13,outname);
write_object(outfile,first_section,first_symbol);
}
leave();
return 0; /* not reached */
}
/* Very simple, very incomplete. */
void parse(void)
{
char *s,*line,*inst,*ext[MAX_QUALIFIERS?MAX_QUALIFIERS:1],*op[MAX_OPERANDS];
int inst_len,ext_len[MAX_QUALIFIERS?MAX_QUALIFIERS:1],op_len[MAX_OPERANDS];
int i,ext_cnt,op_cnt,par_cnt;
instruction *ip;
while(line=read_next_line()){
s=line;
if(isalnum((unsigned char)*s)){
/* Handle labels at beginning of line */
char *labname,*equ;
symbol *label;
while(*s&&!isspace((unsigned char)*s)&&*s!=':')
s++;
labname=cnvstr(line,s-line);
s=skip(s+1);
if(!strncmp(s,"equ",3)&&isspace((unsigned char)s[3])){
s=skip(s+3);
label=new_abs(labname,parse_expr(&s));
}else{
label=new_labsym(0,labname);
add_atom(0,new_label_atom(label));
}
free(labname);
}
s=parse_cpu_special(s);
if(handle_directive(s))
continue;
/* skip spaces */
s=skip(s);
if(!*s)
continue;
/* read mnemonic name */
inst=s;
if(!ISIDSTART(*s)){
syntax_error(10);
continue;
}
#if MAX_QUALIFIERS==0
while(*s&&!isspace((unsigned char)*s))
s++;
#else
while(*s&&*s!='.'&&!isspace((unsigned char)*s))
s++;
#endif
inst_len=s-inst;
/* read qualifiers */
ext_cnt=0;
while(*s=='.'&&ext_cnt<MAX_QUALIFIERS){
s++;
ext[ext_cnt]=s;
while(*s&&*s!='.'&&!isspace((unsigned char)*s))
s++;
ext_len[ext_cnt]=s-ext[ext_cnt];
if(ext_len[ext_cnt]<=0)
syntax_error(1);
else
ext_cnt++;
}
if(!isspace((unsigned char)*s)) syntax_error(2);
/* read operands, terminated by comma (unless in parentheses) */
s=skip(s);
op_cnt=0;
while(*s&&op_cnt<MAX_OPERANDS){
op[op_cnt]=s;
s=skip_operand(s);
op_len[op_cnt]=s-op[op_cnt];
if(op_len[op_cnt]<=0)
syntax_error(5);
else
op_cnt++;
s=skip(s);
if(*s!=','){
break;
}else{
s=skip(s+1);
}
}
s=skip(s);
if(*s!=0) syntax_error(6);
ip=new_inst(inst,inst_len,op_cnt,op,op_len);
#if MAX_QUALIFIERS>0
if(ip){
for(i=0;i<ext_cnt;i++)
ip->qualifiers[i]=cnvstr(ext[i],ext_len[i]);
for(;i<MAX_QUALIFIERS;i++)
ip->qualifiers[i]=0;
}
#endif
if(ip){
add_atom(0,new_inst_atom(ip));
}else
;
}
}
static void handle_set(char *s)
{
new_abs(labname,parse_expr_tmplab(&s));
eol(s);
}