-/*
- * Copyright (C) 1995-2005, Index Data ApS
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2011 Index Data
* See the file LICENSE for details.
- *
- * $Id: ber_tag.c,v 1.4 2005-01-15 19:47:11 adam Exp $
*/
/**
#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)
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);
+ 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)
}
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)
{
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)
{
}
}
-/* 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)
{
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)
*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
+ */
+