X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/0875b58fcccadd756e11487185c2ac1d3ed8ab4d..6f444bda1b7deb31cf7fb2395cb0993c3e3b8c42:/trace.h?ds=sidebyside

diff --git a/trace.h b/trace.h
index a6ffabe..c78ba8f 100644
--- a/trace.h
+++ b/trace.h
@@ -1,53 +1,79 @@
 /* -*-c-*-
  *
- * $Id: trace.h,v 1.1 1998/06/17 23:44:42 mdw Exp $
+ * $Id: trace.h,v 1.6 2001/02/03 16:23:55 mdw Exp $
  *
  * Tracing functions for debugging
  *
  * (c) 1998 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------* 
  *
  * This file is part of the mLib utilities library.
  *
  * mLib is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ * 
  * mLib is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with mLib; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * GNU Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with mLib; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
  */
 
 /*----- Revision history --------------------------------------------------*
  *
  * $Log: trace.h,v $
- * Revision 1.1  1998/06/17 23:44:42  mdw
- * Initial revision
+ * Revision 1.6  2001/02/03 16:23:55  mdw
+ * New custom trace output interface.
+ *
+ * Revision 1.5  1999/12/10 23:42:04  mdw
+ * Change header file guard names.
+ *
+ * Revision 1.4  1999/10/22 22:39:52  mdw
+ * New documented interface for tracing.
+ *
+ * Revision 1.3  1999/05/06 19:51:35  mdw
+ * Reformatted the LGPL notice a little bit.
+ *
+ * Revision 1.2  1999/05/05 18:50:31  mdw
+ * Change licensing conditions to LGPL.
+ *
+ * Revision 1.1.1.1  1998/06/17 23:44:42  mdw
+ * Initial version of mLib
  *
  */
 
-#ifndef TRACE_H
-#define TRACE_H
+#ifndef MLIB_TRACE_H
+#define MLIB_TRACE_H
 
 #ifdef __cplusplus
   extern "C" {
 #endif
 
+/*----- Header files ------------------------------------------------------*/
+
 #include <stdio.h>
 
+/*----- Data structures ---------------------------------------------------*/
+
+typedef struct trace_opt {
+  char ch;
+  unsigned f;
+  const char *help;
+} trace_opt;
+
 /*----- Functions provided ------------------------------------------------*/
 
 /* --- @trace@ --- *
  *
- * Arguments:	@unsigned int l@ = trace level for output
+ * Arguments:	@unsigned l@ = trace level for output
  *		@const char *f@ = a @printf@-style format string
  *		@...@ = other arguments
  *
@@ -56,11 +82,11 @@
  * Use:		Reports a message to the trace output.
  */
 
-extern void trace(unsigned int /*l*/, const char */*f*/, ...);
+extern void trace(unsigned /*l*/, const char */*f*/, ...);
 
 /* --- @trace_block@ --- *
  *
- * Arguments:	@unsigned int l@ = trace level for output
+ * Arguments:	@unsigned l@ = trace level for output
  *		@const char *s@ = some header string to write
  *		@const void *b@ = pointer to a block of memory to dump
  *		@size_t sz@ = size of the block of memory
@@ -70,31 +96,46 @@ extern void trace(unsigned int /*l*/, const char */*f*/, ...);
  * Use:		Dumps the contents of a block to the trace output.
  */
 
-extern void trace_block(unsigned int /*l*/, const char */*s*/,
+extern void trace_block(unsigned /*l*/, const char */*s*/,
 			const void */*b*/, size_t /*sz*/);
 
 /* --- @trace_on@ --- *
  *
  * Arguments:	@FILE *fp@ = a file to trace on
- *		@unsigned int l@ = trace level to set
+ *		@unsigned l@ = trace level to set
  *
  * Returns:	---
  *
  * Use:		Enables tracing to a file.
  */
 
-extern void trace_on(FILE */*fp*/, unsigned int /*l*/);
+extern void trace_on(FILE */*fp*/, unsigned /*l*/);
 
-/* --- @trace_setLevel@ --- *
+/* --- @trace_custom@ --- *
  *
- * Arguments:	@unsigned int l@ = trace level to set
+ * Arguments:	@void (*func)(const char *buf, size_t sz, void *v)@ =
+ *			output function
+ *		@void *v@ = magic handle to give to function
+ *
+ * Returns:	---
+ *
+ * Use:		Sets up a custom trace handler.
+ */
+
+extern void trace_custom(void (*/*func*/)(const char */*buf*/,
+					  size_t /*sz*/, void */*v*/),
+			 void */*v*/);
+
+/* --- @trace_level@ --- *
+ *
+ * Arguments:	@unsigned l@ = trace level to set
  *
  * Returns:	---
  *
  * Use:		Sets the tracing level.
  */
 
-extern void trace_setLevel(unsigned int /*l*/);
+extern void trace_level(unsigned /*l*/);
 
 /* --- @tracing@ --- *
  *
@@ -105,7 +146,24 @@ extern void trace_setLevel(unsigned int /*l*/);
  * Use:		Informs the caller whether tracing is enabled.
  */
 
-extern unsigned int tracing(void);
+extern unsigned tracing(void);
+
+/* --- @traceopt@ --- *
+ *
+ * Arguments:	@const trace_opt *t@ = pointer to trace options table
+ *		@const char *p@ = option string supplied by user
+ *		@unsigned f@ = initial tracing flags
+ *		@unsigned bad@ = forbidden tracing flags
+ *
+ * Returns:	Trace flags as set by user.
+ *
+ * Use:		Parses an option string from the user and sets the
+ *		appropriate trace flags.  If the argument is null or a single
+ *		`?' character, a help message is displayed.
+ */
+
+extern unsigned traceopt(const trace_opt */*t*/, const char */*p*/,
+			 unsigned /*f*/, unsigned /*bad*/);
 
 /*----- Tracing macros ----------------------------------------------------*/