logging functions as error printer

hawk/lib/hawk.c

@@ -172,11 +172,7 @@ int hawk_init (hawk_t* awk, hawk_mmgr_t* mmgr, hawk_cmgr_t* cmgr, const hawk_prm
 
 	if (init_token(awk, &awk->ptok) <= -1 ||
 	    init_token(awk, &awk->tok) <= -1 ||
-	    init_token(awk, &awk->ntok) <= -1) 
-	{
-		hawk_seterrnum (awk, HAWK_ENOMEM, HAWK_NULL);
-		goto oops;
-	}
+	    init_token(awk, &awk->ntok) <= -1) goto oops;
 
 	awk->opt.trait = HAWK_MODERN;
 #if defined(__OS2__) || defined(_WIN32) || defined(__DOS__)
@@ -186,6 +182,10 @@ int hawk_init (hawk_t* awk, hawk_mmgr_t* mmgr, hawk_cmgr_t* cmgr, const hawk_prm
 	awk->opt.log_mask = HAWK_LOG_ALL_LEVELS  | HAWK_LOG_ALL_TYPES;
 	awk->opt.log_maxcapa = HAWK_DFL_LOG_MAXCAPA;
 
+	awk->log.capa = HAWK_ALIGN_POW2(1, HAWK_LOG_CAPA_ALIGN);
+	awk->log.ptr = hawk_allocmem(awk, (awk->log.capa + 1) * HAWK_SIZEOF(*awk->log.ptr));
+	if (!awk->log.ptr) goto oops;
+
 	awk->tree.ngbls = 0;
 	awk->tree.ngbls_base = 0;
 	awk->tree.begin = HAWK_NULL;
@@ -263,6 +263,8 @@ oops:
 	fini_token (&awk->ntok);
 	fini_token (&awk->tok);
 	fini_token (&awk->ptok);
+	if (awk->log.ptr) hawk_freemem (awk, awk->log.ptr);
+	awk->log.capa = 0;
 
 	return -1;
 }
@@ -275,6 +277,14 @@ void hawk_fini (hawk_t* awk)
 	hawk_clear (awk);
 	/*hawk_clrfnc (awk);*/
 
+	if (awk->log.len >  0)
+        {
+		int shuterr = awk->shuterr;
+		awk->shuterr = 1;
+		awk->prm.logwrite (awk, awk->log.last_mask, awk->log.ptr, awk->log.len);
+		awk->shuterr = shuterr;
+	}
+
 	for (ecb = awk->ecb; ecb; ecb = ecb->next)
 		if (ecb->close) ecb->close (awk);
 
@@ -301,6 +311,25 @@ void hawk_fini (hawk_t* awk)
 	{
 		if (awk->opt.mod[i].ptr) hawk_freemem (awk, awk->opt.mod[i].ptr);
 	}
+
+	if (awk->log.len >  0)
+        {
+		/* flush pending log message that could be generated by the fini 
+		 * callbacks. however, the actual logging might not be produced at
+		 * this point because one of the callbacks could arrange to stop
+		 * logging */
+		int shuterr = awk->shuterr;
+		awk->shuterr = 1;
+		awk->prm.logwrite (awk, awk->log.last_mask, awk->log.ptr, awk->log.len);
+		awk->shuterr = shuterr;
+	}
+
+	if (awk->log.ptr) 
+	{
+		hawk_freemem (awk, awk->log.ptr);
+		awk->log.capa = 0;
+		awk->log.len = 0;
+	}
 }
 
 static hawk_rbt_walk_t unload_module (hawk_rbt_t* rbt, hawk_rbt_pair_t* pair, void* ctx)