X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=odr%2Fber_tag.c;h=fb16296b82c9757d654eceb698b541579e2f28e2;hb=41f4b2c49b60cf5f9ae896b537211ae830c39a55;hp=f6c3576879df17011664847ae7a3a85c1d4e729f;hpb=1b06a5c10770ef964044f824a33d4cc8652d8e7a;p=yaz-moved-to-github.git

diff --git a/odr/ber_tag.c b/odr/ber_tag.c
index f6c3576..fb16296 100644
--- a/odr/ber_tag.c
+++ b/odr/ber_tag.c
@@ -4,7 +4,16 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: ber_tag.c,v $
- * Revision 1.4  1995-02-10 15:55:28  quinn
+ * Revision 1.7  1995-03-08 12:12:13  quinn
+ * Added better error checking.
+ *
+ * Revision 1.6  1995/02/14  11:54:33  quinn
+ * Adjustments.
+ *
+ * Revision 1.5  1995/02/10  18:57:24  quinn
+ * More in the way of error-checking.
+ *
+ * Revision 1.4  1995/02/10  15:55:28  quinn
  * Bug fixes, mostly.
  *
  * Revision 1.3  1995/02/09  15:51:46  quinn
@@ -28,24 +37,39 @@
  * On decoding:
  *      if tag && class match up, advance pointer and return 1. set cons.
  *      else leave pointer unchanged. Return 0.
+ *
+ * Should perhaps be odr_tag?
 */
-int ber_tag(ODR o, const void *p, int class, int tag, int *constructed)
+int ber_tag(ODR o, void *p, int class, int tag, int *constructed, int opt)
 {
     static int lclass = -1, ltag, br, lcons; /* save t&c rather than
 						decoding twice */
     int rd;
+    char **pp = p;
 
+    if (o->direction == ODR_DECODE)
+    	*pp = 0;
     o->t_class = -1;
-    if (o->buf == o->bp)   /* This is insurance. It shouldn't be necessary */
+    if (o->stackp < 0)
+    {
+    	o->bp = o->buf;
     	lclass = -1;
+    }
     switch (o->direction)
     {
     	case ODR_ENCODE:
-	    if (!p)
+	    if (!*pp)
+	    {
+	    	if (!opt)
+		    o->error = OREQUIRED;
 	    	return 0;
+	    }
 	    if ((rd = ber_enctag(o->bp, class, tag, *constructed, o->left))
 		<=0)
+	    {
+	    	o->error = OSPACE;
 		return -1;
+	    }
 	    o->bp += rd;
 	    o->left -= rd;
 #ifdef ODR_DEBUG
@@ -55,11 +79,18 @@ int ber_tag(ODR o, const void *p, int class, int tag, int *constructed)
 	    return 1;
     	case ODR_DECODE:
 	    if (o->stackp > -1 && !odr_constructed_more(o))
+	    {
+	    	if (!opt)
+		    o->error = OREQUIRED;
 	    	return 0;
+	    }
 	    if (lclass < 0)
 	    {
 	    	if ((br = ber_dectag(o->bp, &lclass, &ltag, &lcons)) <= 0)
-		    return -1;
+		{
+		    o->error = OPROTO;
+		    return 0;
+		}
 #ifdef ODR_DEBUG
 		fprintf(stderr, "\n[class=%d,tag=%d,cons=%d]", lclass, ltag,
 		    lcons);
@@ -74,9 +105,16 @@ int ber_tag(ODR o, const void *p, int class, int tag, int *constructed)
 	    	return 1;
 	    }
 	    else
+	    {
+	    	if (!opt)
+		    o->error = OREQUIRED;
 	    	return 0;
-    	case ODR_PRINT: return p != 0;
-    	default: return 0;
+	    }
+    	case ODR_PRINT:
+		if (!*pp && !opt)
+		    o->error = OREQUIRED;
+		return *pp != 0;
+    	default: o->error = OOTHER; return 0;
     }
 }