1File: MAIN.C                                                              Page       1
     1   /*
     2   	Copyright 1982
     3   	Alcyon Corporation
     4   	8716 Production Ave.
     5   	San Diego, Ca.  92121
     6   */
     7    
     8   char *version "@(#) c068 parser 4.0 - Feb 11, 1983";
     9   /*
    10   	ALCYON C Compiler for the Motorola 68000 - Parser
    11    
    12   	Called from c68:
    13    
    14   		c068 source icode strings
    15    
    16   	source:		input source code, preprocessed with comments stripped
    17    
    18   	icode:		contains the intermediate code for the code generator,
    19   				for a detailed explanaion see ../doc/icode.
    20    
    21   	strings:	contains all the string constants.
    22    
    23   	The basic structure of the parser is as follows:
    24    
    25   	main							main driver for parser
    26   		syminit						initializes symbol table
    27   		doextdef					external definition syntax
    28   			getatt					get type attributes
    29   				dlist				declaration list for structures/unions
    30   					getatt			recursive gettype call
    31   					dodecl			do one declaration
    32   						declarator	handle declarator syntax
    33   			dodecl					do one external declaraion
    34   			initlist				external initialization list
    35   				cexpr				constant expressions
    36   					expr			arithmetic expressions
    37   						maketree	build operator tree
    38   			funcbody				function body
    39   				dlist				declaration list
    40   				stmt				function statements
    41   					stmt			recursive stmt call
    42   					expr			arithmetic expressions
    43    
    44    */
    45    
    46   #include "parser.h"
    47    
    48   int nextlabel	1;
    49   int lineno;
    50   char *exprp		&exprarea[0];
    51    
    52   /*
    53    * main - main routine for parser
    54    *		Checks arguments, opens input and output files, does main loop
    55    *		for external declarations and blocks.
    56    */
    57   main(argc,argv)							/* returns - none*/
    58   int argc;								/* argument count*/
    59   char *argv[];							/* argument pointers*/
1File: MAIN.C                                                              Page       2
    60   {
    61   	register char *q;
    62   	register int i;
    63    
    64   	for( i = 4; i < argc; i++ ) {
    65   		q = argv[i];
    66   		if( *q++ != '-' )
    67   			usage();
    68   		while( 1 ) {
    69   			switch( *q++ ) {
    70    
    71   			case 'F':
    72   			case 'f':
    73   				fflag++;
    74   				continue;
    75    
    76   			case 'E':
    77   			case 'e':
    78   				eflag++;
    79   				continue;
    80    
    81   			case 'W':
    82   			case 'w':
    83   				wflag++;
    84   				continue;
    85    
    86   			case '\0':
    87   				break;
    88    
    89   			default:
    90   				usage();
    91   			}
    92   			break;
    93   		}
    94   	}
    95   	if( argc < 4 )
    96   		usage();
    97   	if( fopen(argv[1],&ibuf,0) < 0 )	/* 3rd arg for versados */
    98   		ferror("can't open %s",argv[i]);
    99   	if( fcreat(argv[2],&obuf,0) < 0 || fcreat(argv[3],&sbuf,0) < 0 )
   100   		ferror("temp creation error");
   101   	obp = &obuf;
   102   	lineno++;
   103   	frstp = -1;		/* [vlh] 3.4 - initialize only once */
   104   	syminit();
   105   	while( !peek(EOF) )
   106   		doextdef();
   107   	outeof();
   108   	outdata();
   109   	copysfile(argv[3]);
   110   	exit(errcnt!=0);
   111   }
   112    
   113   /* usage - output usage error message and die*/
   114   usage()
   115   {
   116   	ferror("usage: c068 source icode str [-e] [-f] [-w]");
   117   }
   118    
1File: MAIN.C                                                              Page       3
   119   /* error - report an error message*/
   120   /*		outputs current line number and error message*/
   121   error(s,x1,x2,x3,x4,x5,x6)			/* returns - none*/
   122   char *s;							/* error message*/
   123   int x1, x2, x3, x4, x5, x6;			/* args for printf*/
   124   {
   125   	register char *savep;
   126    
   127   	savep = obp;
   128   	obp = 0;
   129   	errcnt++;
   130   	if (!inclflag) {
   131   		if( lineno )
   132   			printf("* %d: ",lineno);
   133   	}
   134   	else	/*[vlh] generate filename and approp line #*/
   135   		printf("%s: * %d: ",inclfile,inclline);
   136   	printf(s,x1,x2,x3,x4,x5,x6);
   137   	printf("\n");
   138   	obp = savep;
   139   }
   140    
   141   /* ferror - fatal error*/
   142   /*		Outputs error message and exits*/
   143   ferror(s,x1,x2,x3,x4,x5,x6)			/* returns - none*/
   144   char *s;							/* error message*/
   145   int x1, x2, x3, x4, x5, x6;			/* args for printf*/
   146   {
   147   	error(s,x1,x2,x3,x4,x5,x6);
   148   	exit(1);
   149   }
   150    
   151   v6flush(v6buf)
   152   struct iobuf *v6buf;
   153   {
   154   	register i;
   155    
   156   	i = BLEN - v6buf->nunused;
   157   	v6buf->nunused = BLEN;
   158   	v6buf->xfree = &(v6buf->buff[0]);
   159   	if(write(v6buf->fildes,v6buf->xfree,i) != i)
   160   		return(-1);
   161   	return(0);
   162   }
   163   printf(string,a,b,c,d,e,f,g)
   164   char	*string;
   165   int	 a,b,c,d,e,f,g;
   166   {
   167   char	area[256];
   168   register char *p;
   169    
   170   	sprintf(area,string,a,b,c,d,e,f,g);
   171   	for(p = &area[0]; *p; p++)
   172   		putchar(*p);
   173   }