xref: /titanic_52/usr/src/cmd/abi/spectrans/parser/errlog.c (revision 3f7d54a6b84904c8f4d8daa4c7b577bede7df8b9)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*
30  *  errlog -- error logging facility for application programs
31  */
32 
33 #include <stdio.h>
34 #include <stdarg.h>
35 #include <stdlib.h>
36 #include "errlog.h"
37 
38 /*  Statics (this object is not threadable). */
39 static int Severity;
40 static struct location {
41 	char *l_file;
42 	int l_lineno;
43 	char *l_tag;
44 	char *l_line;
45 } Location;
46 
47 /* Indentation */
48 static int  Trace_indent;
49 /* XXX YES, its 80 spaces !@#$%^ */
50 static char Trace_padding[] =
51 	"                                              "
52 	"                                  ";
53 
54 #define	INDENT &Trace_padding[80-(Trace_indent*4)]
55 #define	PRINTHDR	INPUT
56 
57 /*
58  * errlog -- simulate the syslog printf-like interface, but
59  *	with a first argument oriented toward reporting
60  *	application errors.
61  */
62 /*VARARGS2*/
63 void
64 errlog(const int descriptor, const char *format, ...)
65 {
66 	va_list ap;
67 
68 	va_start(ap, format);
69 	if ((Severity < (descriptor & FATAL)) &&
70 	    ((descriptor & FATAL) != FATAL)) {
71 		/* We don't need to say/do anything. */
72 		return;
73 	}
74 
75 	/* Produce the message. */
76 	(void) fflush(stdout); /* Synchronize streams. */
77 	if ((descriptor & PRINTHDR) != 0) {
78 		if (Location.l_file == NULL) {
79 			(void) fprintf(stderr, "programmer error, logerr "
80 			    "told to print file, line number, "
81 			    "but file was not set.\n");
82 		} else {
83 			(void) fprintf(stderr, "\"%s\", line %d: ",
84 			    Location.l_file, Location.l_lineno);
85 		}
86 	}
87 
88 	/* Indent/outdent. */
89 	if (descriptor & INDENTED) {
90 		(void) fprintf(stderr, "%s", INDENT);
91 		Trace_indent = (Trace_indent < 20)? Trace_indent + 1: 20;
92 	} else if (descriptor & OUTDENTED) {
93 		Trace_indent = (Trace_indent > 0)? Trace_indent - 1: 0;
94 		(void) fprintf(stderr, "%s", INDENT);
95 	} else {
96 		(void) fprintf(stderr, "%s", INDENT);
97 	}
98 
99 	/* Print the stuff we did all this for. */
100 	(void) vfprintf(stderr, format, ap);
101 
102 	if ((descriptor & INPUT) && Location.l_line != NULL) {
103 		/* Emit trailers. Formatting TBD. */
104 		(void) putc('\n', stderr);
105 		(void) fprintf(stderr, "\tLine was: %s %s",
106 		    Location.l_tag, Location.l_line);
107 	}
108 	(void) putc('\n', stderr);
109 	(void) fflush(stderr); /* No-op on Solaris. */
110 
111 	if ((descriptor & FATAL) == FATAL) {
112 		/* Say goodbye! */
113 		exit(1);
114 	}
115 	va_end(ap);
116 }
117 
118 /*
119  * seterrline -- tell errlog what the context of the error is.
120  */
121 void
122 seterrline(const int lineno, const char *file,
123     const char *tag, const char *line)
124 {
125 	Location.l_lineno = lineno;
126 	Location.l_file = (char *)file;
127 	Location.l_tag = (char *)tag;
128 	Location.l_line = (char *)line;
129 }
130 
131 /*
132  * seterrseverity -- set the severity/loudness variable.
133  *	This is traditionally the ``Verbosity'' level.
134  */
135 void
136 seterrseverity(const int loudness)
137 {
138 	Severity = (loudness & FATAL);
139 }
140