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- /*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- *
- * Author: Ceriel J.H. Jacobs
- */
- /* E R R O R A N D D I A G N O S T I C R O U T I N E S */
- /* stripped down version from the one in the Modula-2 compiler */
- /* $Id$ */
- /* This file contains the error-message and diagnostic
- giving functions. Be aware that they are called with a variable
- number of arguments!
- */
- #if __STDC__
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
- #include <system.h>
- #include "input.h"
- #include "f_info.h"
- #include "LLlex.h"
- /* error classes */
- #define ERROR 1
- #define LEXERROR 3
- #define CRASH 5
- #define FATAL 6
- int err_occurred;
- extern char *symbol2str();
- /* There are three general error-message functions:
- lexerror() lexical and pre-processor error messages
- error() syntactic and semantic error messages
- node_error() errors in nodes
- The difference lies in the place where the file name and line
- number come from.
- Lexical errors report from the global variables LineNumber and
- FileName, node errors get their information from the
- node, whereas other errors use the information in the token.
- */
- #if __STDC__
- /*VARARGS1*/
- error(char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- _error(ERROR, fmt, ap);
- va_end(ap);
- }
- /*VARARGS1*/
- Gerror(char *fmt, ...)
- {
- va_list ap;
- char *fn = FileName;
- FileName = 0;
- va_start(ap, fmt);
- _error(ERROR, fmt, ap);
- va_end(ap);
- FileName = fn;
- }
- /*VARARGS1*/
- lexerror(char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- _error(LEXERROR, fmt, ap);
- va_end(ap);
- }
- /*VARARGS1*/
- fatal(char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- _error(FATAL, fmt, ap);
- va_end(ap);
- sys_stop(S_EXIT);
- }
- /*VARARGS1*/
- crash(char *fmt, ...)
- {
- va_list ap;
- va_start(ap, fmt);
- _error(CRASH, fmt, ap);
- va_end(ap);
- #ifdef DEBUG
- sys_stop(S_ABORT);
- #else
- sys_stop(S_EXIT);
- #endif
- }
- #else
- /*VARARGS1*/
- error(va_alist)
- va_dcl
- {
- va_list ap;
- char *fmt;
- va_start(ap);
- fmt = va_arg(ap, char *);
- _error(ERROR, fmt, ap);
- va_end(ap);
- }
- /*VARARGS1*/
- Gerror(va_alist)
- va_dcl
- {
- va_list ap;
- char *fmt;
- char *fn = FileName;
- FileName = 0;
- va_start(ap);
- fmt = va_arg(ap, char *);
- _error(ERROR, fmt, ap);
- va_end(ap);
- FileName = fn;
- }
- /*VARARGS1*/
- lexerror(va_alist)
- va_dcl
- {
- va_list ap;
- char *fmt;
- va_start(ap);
- fmt = va_arg(ap, char *);
- _error(LEXERROR, fmt, ap);
- va_end(ap);
- }
- /*VARARGS1*/
- fatal(va_alist)
- va_dcl
- {
- va_list ap;
- char *fmt;
- va_start(ap);
- fmt = va_arg(ap, char *);
- _error(FATAL, fmt, ap);
- va_end(ap);
- sys_stop(S_EXIT);
- }
- /*VARARGS1*/
- crash(va_alist)
- va_dcl
- {
- va_list ap;
- char *fmt;
- va_start(ap);
- fmt = va_arg(ap, char *);
- _error(CRASH, fmt, ap);
- va_end(ap);
- #ifdef DEBUG
- sys_stop(S_ABORT);
- #else
- sys_stop(S_EXIT);
- #endif
- }
- #endif
- _error(class, fmt, argv)
- int class;
- char *fmt;
- va_list argv;
- {
- /* _error attempts to limit the number of error messages
- for a given line to MAXERR_LINE.
- */
- unsigned int ln = 0;
- register char *remark = 0;
-
- /* Since name and number are gathered from different places
- depending on the class, we first collect the relevant
- values and then decide what to print.
- */
- /* preliminaries */
- switch (class) {
- case ERROR:
- case LEXERROR:
- case CRASH:
- case FATAL:
- err_occurred = 1;
- break;
- }
- /* the remark */
- switch (class) {
- case CRASH:
- remark = "CRASH\007";
- break;
- case FATAL:
- remark = "fatal error --";
- break;
- }
-
- /* the place */
- switch (class) {
- case ERROR:
- ln = dot.tk_lineno;
- break;
- case LEXERROR:
- case CRASH:
- case FATAL:
- ln = LineNumber;
- break;
- }
-
- if (FileName) fprint(STDERR, "\"%s\", line %u: ", FileName, ln);
- if (remark) fprint(STDERR, "%s ", remark);
- doprnt(STDERR, fmt, argv); /* contents of error */
- fprint(STDERR, "\n");
- }
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