scc

simple C compiler
git clone git://git.2f30.org/scc
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main.c (1525B)

      1 static char sccsid[] = "@(#) ./cc1/main.c";
      2 #include <setjmp.h>
      3 #include <stdlib.h>
      4 #include <string.h>
      5 #include <errno.h>
      6 
      7 #include "../inc/arg.h"
      8 #include "../inc/scc.h"
      9 #include "cc1.h"
     10 
     11 char *argv0, *infile;
     12 
     13 int warnings;
     14 jmp_buf recover;
     15 
     16 static struct items uflags;
     17 int onlycpp, onlyheader;
     18 
     19 
     20 extern int failure;
     21 
     22 static void
     23 defmacro(char *macro)
     24 {
     25 	char *p = strchr(macro, '=');
     26 
     27 	if (p)
     28 		*p++ = '\0';
     29 	else
     30 		p = "1";
     31 
     32 	defdefine(macro, p, "command-line");
     33 }
     34 
     35 static void
     36 usage(void)
     37 {
     38 	die("usage: cc1 [-Ewd] [-D def[=val]]... [-U def]... "
     39 	    "[-I dir]... [-o output] [input]");
     40 }
     41 
     42 int
     43 main(int argc, char *argv[])
     44 {
     45 	int i;
     46 
     47 	ilex();
     48 	icpp();
     49 	icode();
     50 	ibuilts();
     51 
     52 	ARGBEGIN {
     53 	case 'D':
     54 		defmacro(EARGF(usage()));
     55 		break;
     56 	case 'M':
     57 		onlyheader = 1;
     58 		break;
     59 	case 'E':
     60 		onlycpp = 1;
     61 		break;
     62 	case 'I':
     63 		incdir(EARGF(usage()));
     64 		break;
     65 	case 'U':
     66 		newitem(&uflags, EARGF(usage()));
     67 		break;
     68 	case 'd':
     69 		DBGON();
     70 		break;
     71 	case 'w':
     72 		warnings = 1;
     73 		break;
     74 	default:
     75 		usage();
     76 	} ARGEND
     77 
     78 	if (argc > 1)
     79 		usage();
     80 
     81 	for (i = 0; i < uflags.n; ++i)
     82 		undefmacro(uflags.s[i]);
     83 
     84 	infile = (*argv) ? *argv : "<stdin>";
     85 	if (!addinput(*argv, NULL, NULL)) {
     86 		die("error: failed to open input file '%s': %s",
     87 		    *argv, strerror(errno));
     88 	}
     89 
     90 	/*
     91 	 * we cannot initialize arch until we have an
     92 	 * output stream, because we maybe want to emit new types
     93 	 */
     94 	iarch();
     95 	if (onlycpp || onlyheader) {
     96 		outcpp();
     97 	} else {
     98 		for (next(); yytoken != EOFTOK; decl())
     99 			/* nothing */;
    100 	}
    101 
    102 	return failure;
    103 }