Use <stdarg.h> in util/misc/convert.c

I made a syntax error in some .e file, and em_encode dumped core
because a 64-bit pointer didn't fit in a 32-bit int.  Now use stdarg
to pass pointers to error() and fatal().

Stop using the number of errors as the exit status.  Many systems use
only the low 8 bits of the exit status, so 256 errors would become 0.

Also change modules/src/print to accept const char *buf

modules/src/print/doprnt.c

@@ -16,7 +16,7 @@
 	%d = int
 $ */
 void
-doprnt(File *fp, char *fmt, va_list argp)
+doprnt(File *fp, const char *fmt, va_list argp)
 {
 	char buf[SSIZE];
 

modules/src/print/format.c

@@ -35,7 +35,7 @@ integral(int c)
 	%d = int
 $ */
 int
-_format(char *buf, char *fmt, va_list argp)
+_format(char *buf, const char *fmt, va_list argp)
 {
 	register char *pf = fmt;
 	register char *pb = buf;

modules/src/print/fprint.c

@@ -17,7 +17,7 @@
 $ */
 /*VARARGS*/
 void
-fprint(File *fp, char *fmt, ...)
+fprint(File *fp, const char *fmt, ...)
 {
 	va_list args;
 	char buf[SSIZE];

modules/src/print/print.c

@@ -17,7 +17,7 @@
 $ */
 /*VARARGS*/
 void
-print(char *fmt, ...)
+print(const char *fmt, ...)
 {
 	va_list args;
 	char buf[SSIZE];

modules/src/print/print.h

@@ -9,10 +9,10 @@
 
 #include <stdarg.h>
 
-void print(char *fmt, ...);
-void fprint(File *f, char *fmt, ...);
-void doprnt(File *f, char *fmt, va_list ap);
-int _format(char *buf, char *fmt, va_list ap);
-char *sprint(char *buf, char *fmt, ...);
+void print(const char *fmt, ...);
+void fprint(File *f, const char *fmt, ...);
+void doprnt(File *f, const char *fmt, va_list ap);
+int _format(char *buf, const char *fmt, va_list ap);
+char *sprint(char *buf, const char *fmt, ...);
 
 #endif /* __PRINT_INCLUDED__ */

modules/src/print/sprint.c

@@ -17,7 +17,7 @@
 $ */
 /*VARARGS*/
 char *
-sprint(char *buf, char *fmt, ...)
+sprint(char *buf, const char *fmt, ...)
 {
 	va_list args;
 

util/misc/convert.c

@@ -16,8 +16,10 @@ static char rcsid[] = "$Id$";
 	linked.
 */
 
+#include <stdarg.h>
 #include <stdlib.h>
 #include "system.h"
+#include "print.h"
 #include "em_pseu.h"
 #include "em_mnem.h"
 #include "em_spec.h"
@@ -30,8 +32,11 @@ char *filename;			/* Name of input file */
 int errors;			/* Number of errors */
 extern char *C_error;
 
-main(argc,argv)
-	char **argv;
+void error(const char *, ...);
+void fatal(const char *, ...);
+
+int
+main(int argc, char **argv)
 {
 	struct e_instr buf;
 	register struct e_instr *p = &buf;
@@ -66,27 +71,32 @@ main(argc,argv)
 	}
 	C_close();
 	EM_close();
-	exit(errors);
+	exit(errors ? 1 : 0);
 }
 
 /* VARARGS */
-error(s,a1,a2,a3,a4)
-	char *s;
+void
+error(const char *s, ...)
 {
+	va_list ap;
+	va_start(ap, s);
 	fprint(STDERR,
 		"%s, line %d: ",
 		filename ? filename : "standard input",
 		EM_lineno);
-	fprint(STDERR,s,a1,a2,a3,a4);
+	doprnt(STDERR, s, ap);
 	fprint(STDERR, "\n");
 	errors++;
+	va_end(ap);
 }
 
 /* VARARGS */
-fatal(s,a1,a2,a3,a4)
-	char *s;
+void
+fatal(const char *s, ...)
 {
+	va_list ap;
+	va_start(ap, s);
 	if (C_busy()) C_close();
-	error(s,a1,a2,a3,a4);
+	error(s, ap);
 	exit(1);
 }