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