decs.c

#include <dcw.h>
#include "struct.h"
#include "decs.h"


/*
/^#ifdef HASPROTOS
!/endif$
stat %
*/


#ifdef HASPROTOS
static void line( char * , long , long , long , long );
static void declfields( paramlist );
static void data_decls( declnlist );
static void one_proto( char * , shapelist , BOOL );
static void protos( declnlist , BOOL );
static void cons_fn_hdr( char * , shapelist );
static void cons_fn_body( declnlist , char * , shapelist );
static void cons_fns( declnlist );
static void print_param( char * , paramlist , BOOL );
static void print_all_params( declnlist , shapelist );
static void print_fn_shape( declnlist , shapelist );
static void print_fns( declnlist );
static void h_declns( char * , char * , declnlist );
static void c_declns( char * , char * , declnlist );
#else
static void line();
static void declfields();
static void data_decls();
static void one_proto();
static void protos();
static void cons_fn_hdr();
static void cons_fn_body();
static void cons_fns();
static void print_param();
static void print_all_params();
static void print_fn_shape();
static void print_fns();
static void h_declns();
static void c_declns();
#endif


static int numtabs = 0;
static FILE *outfile;


#define indent() numtabs++
#define outdent() numtabs--

#define nl()		fputc( '\n', outfile )
#define outchar(c)	fputc( c, outfile )
#define usefile(f)	outfile = f, numtabs = 0



/*VARARGS*/
static void line( fmt, a, b, c, d ) char *fmt; long a, b, c, d;
{
	int i;

	for( i=numtabs; i; i-- ) fputc( '\t', outfile );
	fprintf( outfile, fmt, a, b, c, d );
	nl();
}


static void declfields( p ) paramlist p;
{
	for( ; p != NULL; p=p->next )
	{
		line( "%s\t%s;", p->type, p->name );
	}
}


static void data_decls( decs ) declnlist decs;
{
	declnlist	d;
	shapelist	s;
	int		n;

	for( d=decs; d != NULL; d=d->next )
	{
		if( d->Struct )
		{
			line("struct %s;", d->name);
			line("typedef struct %s *%s;", d->name, d->name );
		} else
		{
			line( "typedef int %s;", d->name );
		}
	}
	line( "\n" );
	for( d=decs; d != NULL; d=d->next )
	{
		line( "/* ---- Type %s ---- */\n", d->name );
		n = 0;
		if( d->Defines )
		{
			for( s = d->shapes; s != NULL; s=s->next )
			{
				if( d->Struct )
				{
					line( "#define %s_%s_tag %d",
						d->name, s->name, n++ );
				} else
				{
					line( "#define %s_%s() %d",
						d->name, s->name, n++ );
				}
			}
			line( "" );
		}

		if( d->Struct )
		{
			line( "struct %s {", d->name );
			indent();
			if( d->TagField )
			{
				line( "int\ttag;" );
			}
			if( d->Union )
			{
				line( "union {" );
				indent();
			}
			for( s = d->shapes; s != NULL; s=s->next )
			{
				if( d->Union && s->params )
				/* need internal structures */
				{
					line( "struct {" );
					indent();
					declfields( s->params );
					outdent();
					line( "} %s;", s->name );
				} else
				{
					declfields( s->params );
				}
			}
			if( d->Union )
			{
				outdent();
				line( "} u;" );
			}
			outdent();
			line( "};\n" );
		}
	}
}


static void one_proto( name, s, prot ) char *name; shapelist s; BOOL prot;
{
	paramlist p;
	BOOL first;

	fprintf( outfile, "extern %s %s_%s( ", name, name, s->name );
	if( prot )
	{
		if( s->params == NULL )
		{
			fputs( "void ", outfile );
		} else
		{
			first = TRUE;
			for( p = s->params; p != NULL ; p=p->next, first=FALSE )
			{
				if( !first ) fputs( ", ", outfile );
				fputs( p->type, outfile );
				fputc( ' ', outfile );
			}
		}
	}
	fputs( ");\n", outfile );
}


static void protos( d, prot ) declnlist d; BOOL prot;
{
	shapelist	s;
	shapelist	shapes;

	for( ; d != NULL; d = d->next )
	{
		if( d->Struct )
		{
			shapes = d->shapes;
			if( d->UseNull )
			{
				shapes = shapes->next;
			}
			for( s = shapes; s != NULL; s = s->next )
			{
				one_proto( d->name, s, prot );
			}
		}
		fprintf( outfile, "extern void print_%s(", d->name );
		if( prot )
		{
			fprintf( outfile, " %s ", d->name );
		}
		fputs( ");\n", outfile );
	}
}


static void cons_fn_hdr( name, s ) char *name; shapelist s;
{
	paramlist p;
	BOOL first;

	fprintf( outfile, "%s %s_%s( ", name, name, s->name );
	first = TRUE;
	for( p=s->params; p != NULL; p=p->next, first=FALSE )
	{
		if( !first ) fputs( ", ", outfile );
		fputs( p->name, outfile );
	}
	fputs( " ) ", outfile );
	for( p=s->params; p != NULL; p=p->next )
	{
		fprintf( outfile, "%s %s; ", p->type, p->name );
	}
	nl();
}


static void cons_fn_body( d, name, s ) declnlist d; char *name; shapelist s;
{
	paramlist p;

	ASSERT( d->Struct,
		("error: cons_fn_body called but d->Struct is FALSE!\n") );
	line( "{" );
	indent();
	line( "%s\tnew;\n", name );
	line( "new = NEW(%s);", name );
	if( d->TagField )
	{
		line( "new->tag = %s_%s_tag;", name, s->name );
	}
	for( p=s->params; p != NULL; p=p->next )
	{
		if( d->Union )
		{
			line( "new->u.%s.%s = %s;",
				s->name, p->name, p->name );
		} else
		{
			line( "new->%s = %s;", p->name, p->name );
		}
	}
	line( "return new;" );
	outdent();
	line( "}" );
}


static void cons_fns( d ) declnlist d;
{
	shapelist	s;
	shapelist	shapes;

	for( ; d != NULL; d=d->next )
	{
		if( d->Struct )
		{
			/* We need constructor functions */
			shapes = d->shapes;
			if( d->UseNull )
			{
				/* Null cons func already made */
				shapes = shapes->next;
			}
			for( s = shapes; s != NULL; s=s->next )
			{
				cons_fn_hdr( d->name, s );
				cons_fn_body( d, d->name, s );
				fprintf( outfile, "\n\n" );
			}
		}
	}
}


static void print_param( shape, p, Union ) char *shape; paramlist p; BOOL Union;
{
	char pname[200];

	if( Union )
	{
		sprintf( pname, "p->u.%s.%s", shape, p->name );
	} else
	{
		sprintf( pname, "p->%s", p->name );
	}

	if( streq( p->type, "int" ) )
	{
		line( "fprintf( f, \"%%d\", %s );", pname );
	} else if( streq( p->type, "char" ) )
	{
		line( "fputc( %s, f );", pname );
	} else if( streq( p->type, "BOOL" ) )
	{
		line( "fputs( %s?\"true\":\"false\", f );", pname );
	} else if( streq( p->type, "string" ) )
	{
		line( "fputs( %s, f );", pname );
	} else
	{
		line( "print_%s( f, %s );", p->type, pname );
	}
}


static void print_all_params( d, s ) declnlist d; shapelist s;
{
	printlist	pl;
	paramlist	p;
	int		n;

	if( s->pl == NULL )
	{
		line( "fputs( \"%s\", f );", s->name );
		if( s->params )
		{
			line( "fputc( '(', f );" );
		}
		for( p = s->params; p != NULL; p = p->next )
		{
			print_param( s->name, p, d->Union );
		}
		if( s->params )
		{
			line( "fputc( ')', f );" );
		}
	} else
	{
		for( pl = s->pl; pl != NULL; pl = pl->next )
		{
			if( pl->item->tag == printitem_is_str )
			{
				line( "fputs( \"%s\", f );",
					pl->item->str );
			} else
			{
				n = pl->item->num;
				for( p = s->params; --n; p = p->next )
				{
					ASSERT( p != NULL,
("datadec: bad printitem in shape %s of type %s\n",s->name,d->name));
				}
				print_param( s->name, p, d->Union );
			}
		}
	}
}


static void print_fn_shape( d, s ) declnlist d; shapelist s;
{
	line( "case %s_%s_tag:", d->name, s->name );
	indent();
	print_all_params( d, s );
	line( "break;" );
	outdent();
}


static void print_fns( d ) declnlist d;
{
	shapelist s;
	shapelist shapes;

	for( ; d != NULL; d = d->next )
	{
		shapes = d->shapes;
		line( "void print_%s( f, p ) FILE *f; %s p;",d->name, d->name );
		line( "{" );
		indent();
		if( d->UseNull )
		{
			line( "if( p == NULL )" );
			line( "{" );
			indent();
			print_all_params( d, shapes );
			line( "return;" );
			outdent();
			line( "}" );
			shapes = shapes->next;
		}
		if( d->TagField )
		{
			line( "switch( p->tag )" );
			line( "{" );
			for( s = shapes; s != NULL; s = s->next )
			{
				print_fn_shape( d, s );
			}
			line( "default:" );
			indent();
			line( "fprintf( stderr," );
			line( " \"print_%s: impossible tag %%d\\n\", p->tag );",
				d->name );
			line( "exit(1);" );
			outdent();
			line( "}" );
		} else if( ! d->TagField && d->Struct )	/* one shape left */
		{
			print_all_params( d, shapes );
		} else if( ! d->Struct && d->Defines )	/* enumerated type */
		{
			line( "switch( p )" );
			line( "{" );
			for( s = shapes; s != NULL; s = s->next )
			{
				line( "case %s_%s():", d->name, s->name );
				indent();
				print_all_params( d, s );
				line( "break;" );
				outdent();
			}
			line( "}" );
		} else
		{
			fprintf( stderr,
				 "datadec: internal error in print_fns\n" );
			exit(1);
		}
		outdent();
		line( "}\n" );
	}
}


void make_declns( exports, globals, d, basename ) declnlist d; char *exports, *globals, *basename;
{
	printf( "datadec: Making data declarations in %s.[ch]\n", basename );
	h_declns( basename, exports, d );
	c_declns( basename, globals, d );

}


static void h_declns( basename, exports, d ) char *basename, *exports; declnlist d;
{
	char		tempname[256];
	char		*exportptr;
	FILE		*hfile;
	declnlist	dl;

	sprintf( tempname, "%s.h", basename );
	hfile = fopen( tempname, "w" );
	ASSERT( hfile != NULL, ("datadec: can't create '%s'\n",tempname) );

	usefile( hfile );

	line( "/*" );
	line( " * Automatically Generated by DataDec" );
	line( " */\n" );
	line( "typedef char *string;\n" );
	line( "typedef char BOOL;" );
	line( "#define TRUE 1" );
	line( "#define FALSE 0\n" );
	line( "#define NEW(t) ((t)malloc(sizeof(struct t)))\n\n" );

	if( *exports != '\0' )
	{
		int i;

		line( "/* Contents of EXPORT section */" );
		for( exportptr=exports; *exportptr; exportptr++ )
		{
			if( *exportptr == '@' && exportptr[1] == '@'
			&&   exportptr[2] == '\n' )
			{
				exportptr += 2;
				break;
			}
			outchar( *exportptr );
		}

		nl();
		nl();
	}

	data_decls( d );

	for( dl = d; dl != NULL; dl=dl->next )
	{
		if( dl->UseNull )
		{
			line( "#define %s_%s() ((%s)NULL)",
				dl->name, dl->shapes->name, dl->name );
		}
	}
	line( "#ifdef HASPROTOS" );
	protos( d, TRUE );
	line( "#else" );
	protos( d, FALSE );
	line( "#endif" );

	if( *exportptr != '\0' )
	{
		nl();
		line( "/* Remaining contents of EXPORT section */" );
		line( exportptr );
		nl();
	}

	fclose( hfile );
}


static void c_declns( basename, globals, d ) char *basename, *globals; declnlist d;
{
	char	tempname[256];
	FILE	*cfile;
	char	*globalptr;

	sprintf( tempname, "%s.c", basename );
	cfile = fopen( tempname, "w" );
	ASSERT( cfile != NULL, ("datadec: can't create '%s'\n",tempname) );

	usefile( cfile );

	line( "/*" );
	line( " * Automatically Generated by DataDec" );
	line( " */\n" );
	line( "#include <stdio.h>" );
	line( "#include <malloc.h>" );
	line( "#include \"%s.h\"\n\n", basename );

	if( *globals != '\0' )
	{
		line( "/* Contents of GLOBAL section */" );
		for( globalptr=globals; *globalptr; globalptr++ )
		{
			if( *globalptr == '@' && globalptr[1] == '@'
			&&   globalptr[2] == '\n' )
			{
				globalptr += 2;
				break;
			}
			outchar( *globalptr );
		}

		nl();
		nl();
	}

	cons_fns( d );

	print_fns( d );

	if( *globalptr != '\0' )
	{
		nl();
		nl();
		line( "/* Remaining contents of GLOBAL section */" );
		line( globalptr );
		nl();
	}

	fclose( cfile );
}