X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=src%2Fber_tag.c;h=f7c06863b0a9b8d2a3bbe93f93448a54d677cda9;hp=19c412f703d53a89cc90fe4d92590fcb86a9758f;hb=471c6dccdbb5c5a9c08b24c9abd6a1dcda29e79e;hpb=c6e47cbbff56f39f6d81b079ebaeac41d793d4d9

diff --git a/src/ber_tag.c b/src/ber_tag.c
index 19c412f..f7c0686 100644
--- a/src/ber_tag.c
+++ b/src/ber_tag.c
@@ -1,9 +1,16 @@
 /*
- * Copyright (c) 1995-2003, Index Data
+ * Copyright (C) 1995-2005, Index Data ApS
  * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
  *
- * $Id: ber_tag.c,v 1.1 2003-10-27 12:21:30 adam Exp $
+ * $Id: ber_tag.c,v 1.6 2005-08-11 14:21:55 adam Exp $
+ */
+
+/** 
+ * \file ber_tag.c
+ * \brief Implements BER tags encoding and decoding
+ *
+ * This source file implements BER encoding and decoding of
+ * the tags.
  */
 #if HAVE_CONFIG_H
 #include <config.h>
@@ -12,15 +19,19 @@
 #include <stdio.h>
 #include "odr-priv.h"
 
-/* ber_tag
+/**
+ * \brief Encode/decode BER tags
+ *
  * On encoding:
- *	if  p: write tag. return 1 (success) or -1 (error).
- *	if !p: return 0.
+ * \verbatim
+ *      if  p: write tag. return 1 (success) or -1 (error).
+ *      if !p: return 0.
+ * \endverbatim
  * On decoding:
+ * \verbatim
  *      if tag && zclass match up, advance pointer and return 1. set cons.
  *      else leave pointer unchanged. Return 0.
- *
- * Should perhaps be odr_tag?
+ * \endverbatim
  */
 int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
             const char *name)
@@ -30,13 +41,13 @@ int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
     char **pp = (char **)p;
 
     if (o->direction == ODR_DECODE)
-    	*pp = 0;
+        *pp = 0;
     o->t_class = -1;
-    if (o->op->stackp < 0)
+    if (ODR_STACK_EMPTY(o))
     {
-    	odr_seek(o, ODR_S_SET, 0);
+        odr_seek(o, ODR_S_SET, 0);
         o->top = 0;
-    	o->bp = o->buf;
+        o->bp = o->buf;
         odr_ber_tag->lclass = -1;
     }
     switch (o->direction)
@@ -53,14 +64,9 @@ int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
         }
         if ((rd = ber_enctag(o, zclass, tag, *constructed)) < 0)
             return -1;
-#ifdef ODR_DEBUG
-        fprintf(stderr, "\n[class=%d,tag=%d,cons=%d,stackp=%d]", zclass, tag,
-                *constructed, o->stackp);
-#endif
         return 1;
-        
     case ODR_DECODE:
-        if (o->op->stackp > -1 && !odr_constructed_more(o))
+        if (ODR_STACK_NOT_EMPTY(o) && !odr_constructed_more(o))
         {
             if (!opt)
             {
@@ -80,12 +86,6 @@ int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
                 odr_setelement(o, name);
                 return 0;
             }
-#ifdef ODR_DEBUG
-            fprintf(stderr,
-                    "\n[class=%d,tag=%d,cons=%d,stackp=%d]",
-                    odr_ber_tag->lclass, odr_ber_tag->ltag,
-                    odr_ber_tag->lcons, o->stackp);
-#endif
         }
         if (zclass == odr_ber_tag->lclass && tag == odr_ber_tag->ltag)
         {
@@ -117,9 +117,10 @@ int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
     }
 }
 
-/* ber_enctag
- * BER-encode a zclass/tag/constructed package (identifier octets). Return
- * number of bytes encoded, or -1 if out of bounds.
+/**
+ * \brief BER-encode a zclass/tag/constructed package (identifier octets).
+ *
+ * Return number of bytes encoded, or -1 if out of bounds.
  */
 int ber_enctag(ODR o, int zclass, int tag, int constructed)
 {
@@ -130,36 +131,38 @@ int ber_enctag(ODR o, int zclass, int tag, int constructed)
     b |= (cons << 5) & 0X20;
     if (tag <= 30)
     {
-    	b |= tag & 0X1F;
-	if (odr_putc(o, b) < 0)
-	    return -1;
-    	return 1;
+        b |= tag & 0X1F;
+        if (odr_putc(o, b) < 0)
+            return -1;
+        return 1;
     }
     else
     {
-	b |= 0X1F;
-	if (odr_putc(o, b) < 0)
-	    return -1;
-	do
-    	{
-	    octs[n++] = tag & 0X7F;
-	    tag >>= 7;
-	}
-	while (tag);
-	while (n--)
-	{
-	    unsigned char oo;
+        b |= 0X1F;
+        if (odr_putc(o, b) < 0)
+            return -1;
+        do
+        {
+            octs[n++] = tag & 0X7F;
+            tag >>= 7;
+        }
+        while (tag);
+        while (n--)
+        {
+            unsigned char oo;
 
-	    oo = octs[n] | ((n > 0) << 7);
-	    if (odr_putc(o, oo) < 0)
-	    	return -1;
-	}
-	return 0;
+            oo = octs[n] | ((n > 0) << 7);
+            if (odr_putc(o, oo) < 0)
+                return -1;
+        }
+        return 0;
     }
 }
 
-/* ber_dectag
- * Decode BER identifier octets. Return number of bytes read or -1 for error.
+/** 
+ * \brief Decodes BER identifier octets.
+ *
+ * Returns number of bytes read or -1 for error.
  */
 int ber_dectag(const unsigned char *b, int *zclass, int *tag,
                int *constructed, int max)
@@ -172,15 +175,23 @@ int ber_dectag(const unsigned char *b, int *zclass, int *tag,
     *zclass = *b >> 6;
     *constructed = (*b >> 5) & 0X01;
     if ((*tag = *b & 0x1F) <= 30)
-    	return 1;
+        return 1;
     *tag = 0;
     do
     {
         if (l >= max)
             return -1;
-    	*tag <<= 7;
-    	*tag |= b[l] & 0X7F;
+        *tag <<= 7;
+        *tag |= b[l] & 0X7F;
     }
     while (b[l++] & 0X80);
     return l;
 }
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+