404 lines
8.1 KiB
C
404 lines
8.1 KiB
C
/*
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* $Id: ftype-time.c,v 1.21 2003/08/27 15:23:07 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 2001 Gerald Combs
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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 <ctype.h>
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#include <string.h>
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/*
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* Just make sure we include the prototype for strptime as well
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* (needed for glibc 2.2)
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*/
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#define __USE_XOPEN
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#include <time.h>
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#include <ftypes-int.h>
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#ifdef NEED_STRPTIME_H
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#include "strptime.h"
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#endif
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static gboolean
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cmp_eq(fvalue_t *a, fvalue_t *b)
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{
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return ((a->value.time.secs) ==(b->value.time.secs))
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&&((a->value.time.nsecs)==(b->value.time.nsecs));
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}
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static gboolean
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cmp_ne(fvalue_t *a, fvalue_t *b)
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{
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return (a->value.time.secs !=b->value.time.secs)
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||(a->value.time.nsecs!=b->value.time.nsecs);
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}
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static gboolean
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cmp_gt(fvalue_t *a, fvalue_t *b)
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{
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if (a->value.time.secs > b->value.time.secs) {
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return TRUE;
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}
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if (a->value.time.secs < b->value.time.secs) {
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return FALSE;
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}
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return a->value.time.nsecs > b->value.time.nsecs;
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}
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static gboolean
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cmp_ge(fvalue_t *a, fvalue_t *b)
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{
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if (a->value.time.secs > b->value.time.secs) {
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return TRUE;
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}
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if (a->value.time.secs < b->value.time.secs) {
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return FALSE;
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}
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return a->value.time.nsecs >= b->value.time.nsecs;
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}
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static gboolean
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cmp_lt(fvalue_t *a, fvalue_t *b)
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{
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if (a->value.time.secs < b->value.time.secs) {
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return TRUE;
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}
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if (a->value.time.secs > b->value.time.secs) {
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return FALSE;
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}
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return a->value.time.nsecs < b->value.time.nsecs;
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}
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static gboolean
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cmp_le(fvalue_t *a, fvalue_t *b)
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{
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if (a->value.time.secs < b->value.time.secs) {
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return TRUE;
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}
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if (a->value.time.secs > b->value.time.secs) {
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return FALSE;
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}
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return a->value.time.nsecs <= b->value.time.nsecs;
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}
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/*
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* Get a nanoseconds value, starting at "p".
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*
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* Returns true on success, false on failure.
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*/
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static gboolean
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get_nsecs(char *startp, int *nsecs)
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{
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int ndigits;
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int scale;
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char *p;
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int val;
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int digit;
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int i;
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/*
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* How many characters are in the string?
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*/
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ndigits = strlen(startp);
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/*
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* If there are N characters in the string, the last of the
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* characters would be the digit corresponding to 10^(9-N)
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* nanoseconds.
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*/
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scale = 9 - ndigits;
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/*
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* Start at the last character, and work backwards.
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*/
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p = startp + ndigits;
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val = 0;
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while (p != startp) {
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p--;
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if (!isdigit((unsigned char)*p)) {
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/*
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* Not a digit - error.
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*/
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return FALSE;
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}
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digit = *p - '0';
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if (digit != 0) {
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/*
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* Non-zero digit corresponding to that number
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* of (10^scale) units.
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*
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* If scale is less than zero, this digit corresponds
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* to a value less than a nanosecond, so this number
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* isn't valid.
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*/
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if (scale < 0)
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return FALSE;
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for (i = 0; i < scale; i++)
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digit *= 10;
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val += digit;
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}
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scale++;
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}
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*nsecs = val;
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return TRUE;
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}
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static gboolean
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relative_val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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char *curptr, *endptr;
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curptr = s;
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/*
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* If it doesn't begin with ".", it should contain a seconds
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* value.
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*/
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if (*curptr != '.') {
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/*
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* Get the seconds value.
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*/
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fv->value.time.secs = strtoul(curptr, &endptr, 10);
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if (endptr == curptr || (*endptr != '\0' && *endptr != '.'))
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goto fail;
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curptr = endptr;
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if (*curptr == '.')
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curptr++; /* skip the decimal point */
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} else {
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/*
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* No seconds value - it's 0.
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*/
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fv->value.time.secs = 0;
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curptr++; /* skip the decimal point */
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}
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/*
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* If there's more stuff left in the string, it should be the
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* nanoseconds value.
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*/
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if (*curptr != '\0') {
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/*
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* Get the nanoseconds value.
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*/
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if (!get_nsecs(curptr, &fv->value.time.nsecs))
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goto fail;
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} else {
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/*
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* No nanoseconds value - it's 0.
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*/
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fv->value.time.nsecs = 0;
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}
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/*
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* XXX - what about negative values?
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*/
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return TRUE;
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fail:
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if (logfunc != NULL)
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logfunc("\"%s\" is not a valid time.", s);
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return FALSE;
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}
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static gboolean
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absolute_val_from_string(fvalue_t *fv, char *s, LogFunc logfunc)
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{
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struct tm tm;
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char *curptr;
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curptr = strptime(s,"%b %d, %Y %H:%M:%S", &tm);
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if (curptr == NULL)
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goto fail;
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tm.tm_isdst = -1; /* let the computer figure out if it's DST */
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fv->value.time.secs = mktime(&tm);
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if (*curptr != '\0') {
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/*
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* Something came after the seconds field; it must be
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* a nanoseconds field.
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*/
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if (*curptr != '.')
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goto fail; /* it's not */
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curptr++; /* skip the "." */
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if (!isdigit((unsigned char)*curptr))
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goto fail; /* not a digit, so not valid */
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if (!get_nsecs(curptr, &fv->value.time.nsecs))
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goto fail;
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} else {
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/*
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* No nanoseconds value - it's 0.
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*/
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fv->value.time.nsecs = 0;
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}
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if (fv->value.time.secs == -1) {
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/*
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* XXX - should we supply an error message that mentions
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* that the time specified might be syntactically valid
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* but might not actually have occurred, e.g. a time in
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* the non-existent time range after the clocks are
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* set forward during daylight savings time (or possibly
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* that it's in the time range after the clocks are set
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* backward, so that there are two different times that
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* it could be)?
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*/
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goto fail;
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}
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return TRUE;
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fail:
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if (logfunc != NULL)
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logfunc("\"%s\" is not a valid absolute time. Example: \"Nov 12, 1999 08:55:44.123\"",
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s);
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return FALSE;
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}
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static gboolean
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absolute_val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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return absolute_val_from_string(fv, s, logfunc);
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}
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static void
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time_fvalue_new(fvalue_t *fv)
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{
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fv->value.time.secs = 0;
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fv->value.time.nsecs = 0;
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}
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static void
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time_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
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{
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g_assert(!already_copied);
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memcpy(&(fv->value.time), value, sizeof(nstime_t));
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}
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static gpointer
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value_get(fvalue_t *fv)
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{
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return &(fv->value.time);
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}
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static int
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absolute_val_repr_len(fvalue_t *fv, ftrepr_t rtype _U_)
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{
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gchar *rep;
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rep = abs_time_to_str(&fv->value.time);
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return strlen(rep) + 2; /* 2 for opening and closing quotes */
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}
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static void
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absolute_val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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sprintf(buf, "\"%s\"", abs_time_to_str(&fv->value.time));
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}
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static int
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relative_val_repr_len(fvalue_t *fv, ftrepr_t rtype _U_)
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{
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gchar *rep;
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rep = rel_time_to_secs_str(&fv->value.time);
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return strlen(rep);
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}
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static void
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relative_val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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strcpy(buf, rel_time_to_secs_str(&fv->value.time));
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}
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void
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ftype_register_time(void)
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{
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static ftype_t abstime_type = {
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"FT_ABSOLUTE_TIME",
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"date/time",
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0,
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time_fvalue_new,
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NULL,
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absolute_val_from_unparsed, /* val_from_unparsed */
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absolute_val_from_string, /* val_from_string */
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absolute_val_to_repr, /* val_to_string_repr */
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absolute_val_repr_len, /* len_string_repr */
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time_fvalue_set,
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NULL,
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NULL,
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value_get,
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NULL,
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NULL,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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NULL, /* cmp_contains */
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NULL,
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NULL
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};
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static ftype_t reltime_type = {
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"FT_RELATIVE_TIME",
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"time offset",
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0,
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time_fvalue_new,
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NULL,
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relative_val_from_unparsed, /* val_from_unparsed */
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NULL, /* val_from_string */
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relative_val_to_repr, /* val_to_string_repr */
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relative_val_repr_len, /* len_string_repr */
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time_fvalue_set,
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NULL,
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NULL,
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value_get,
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NULL,
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NULL,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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NULL, /* cmp_contains */
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NULL,
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NULL
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};
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ftype_register(FT_ABSOLUTE_TIME, &abstime_type);
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ftype_register(FT_RELATIVE_TIME, &reltime_type);
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}
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