forked from osmocom/wireshark
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/* value_string.c
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* Routines for value_strings
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*
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* $Id: value_string.c,v 1.5 2003/12/01 23:41:44 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include "to_str.h"
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#include "value_string.h"
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/* Tries to match val against each element in the value_string array vs.
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Returns the associated string ptr on a match.
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Formats val with fmt, and returns the resulting string, on failure. */
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gchar*
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val_to_str(guint32 val, const value_string *vs, const char *fmt) {
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gchar *ret;
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static gchar str[3][64];
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static gchar *cur;
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ret = match_strval(val, vs);
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if (ret != NULL)
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return ret;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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snprintf(cur, 64, fmt, val);
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return cur;
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}
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/* Tries to match val against each element in the value_string array vs.
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Returns the associated string ptr on a match, or NULL on failure. */
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gchar*
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match_strval(guint32 val, const value_string *vs) {
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gint i = 0;
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while (vs[i].strptr) {
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if (vs[i].value == val)
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return(vs[i].strptr);
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i++;
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}
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return(NULL);
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}
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/* Generate a string describing an enumerated bitfield (an N-bit field
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with various specific values having particular names). */
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const char *
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decode_enumerated_bitfield(guint32 val, guint32 mask, int width,
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const value_string *tab, const char *fmt)
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{
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static char buf[1025];
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char *p;
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p = decode_bitfield_value(buf, val, mask, width);
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sprintf(p, fmt, val_to_str(val & mask, tab, "Unknown"));
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return buf;
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}
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/* Generate a string describing an enumerated bitfield (an N-bit field
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with various specific values having particular names). */
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const char *
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decode_enumerated_bitfield_shifted(guint32 val, guint32 mask, int width,
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const value_string *tab, const char *fmt)
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{
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static char buf[1025];
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char *p;
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int shift = 0;
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/* Compute the number of bits we have to shift the bitfield right
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to extract its value. */
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while ((mask & (1<<shift)) == 0)
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shift++;
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p = decode_bitfield_value(buf, val, mask, width);
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sprintf(p, fmt, val_to_str((val & mask) >> shift, tab, "Unknown"));
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return buf;
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}
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