ZOOM: For redirect, reconnect always YAZ-722

[yaz-moved-to-github.git] / src / ber_tag.c

diff --git a/src/ber_tag.c b/src/ber_tag.c
index b6f7644..0443857 100644 (file)
--- a/src/ber_tag.c
+++ b/src/ber_tag.c
@@ -1,11 +1,9 @@
-/*
- * Copyright (C) 1995-2005, Index Data ApS
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) Index Data
  * See the file LICENSE for details.
- *
- * $Id: ber_tag.c,v 1.4 2005-01-15 19:47:11 adam Exp $
  */
 
-/** 
+/**
  * \file ber_tag.c
  * \brief Implements BER tags encoding and decoding
  *
@@ -19,15 +17,19 @@
 #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)
@@ -37,13 +39,13 @@ 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;
-    o->t_class = -1;
-    if (o->op->stackp < 0)
+        *pp = 0;
+    o->op->t_class = -1;
+    if (ODR_STACK_EMPTY(o))
     {
-       odr_seek(o, ODR_S_SET, 0);
-        o->top = 0;
-       o->bp = o->buf;
+        odr_seek(o, ODR_S_SET, 0);
+        o->op->top = 0;
+        o->op->bp = o->op->buf;
         odr_ber_tag->lclass = -1;
     }
     switch (o->direction)
@@ -60,14 +62,9 @@ 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->op->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)
             {
@@ -79,7 +76,7 @@ int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt,
         if (odr_ber_tag->lclass < 0)
         {
             if ((odr_ber_tag->br =
-                 ber_dectag(o->bp, &odr_ber_tag->lclass,
+                 ber_dectag(o->op->bp, &odr_ber_tag->lclass,
                             &odr_ber_tag->ltag, &odr_ber_tag->lcons,
                             odr_max(o))) <= 0)
             {
@@ -87,16 +84,10 @@ 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->op->stackp);
-#endif
         }
         if (zclass == odr_ber_tag->lclass && tag == odr_ber_tag->ltag)
         {
-            o->bp += odr_ber_tag->br;
+            o->op->bp += odr_ber_tag->br;
             *constructed = odr_ber_tag->lcons;
             odr_ber_tag->lclass = -1;
             return 1;
@@ -124,9 +115,10 @@ 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)
 {
@@ -137,40 +129,43 @@ 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 ber_dectag(const char *cp, int *zclass, int *tag,
                int *constructed, int max)
 {
+    const unsigned char *b = (const unsigned char *) cp;
     int l = 1;
 
     if (l > max)
@@ -179,15 +174,24 @@ 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
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+