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z35.c
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z35.c
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/*@z35.c:Time Keeper: MomentSym(), TimeString()@******************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.39) */
/* COPYRIGHT (C) 1991, 2008 Jeffrey H. Kingston */
/* */
/* Jeffrey H. Kingston (jeff@it.usyd.edu.au) */
/* School of Information Technologies */
/* The University of Sydney 2006 */
/* AUSTRALIA */
/* */
/* This program is free software; you can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation; either Version 3, or (at your option) */
/* any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA */
/* */
/* FILE: z35.c */
/* MODULE: Time Keeper */
/* EXTERNS: MomentSym, InitTime(), StartMoment(), TimeString() */
/* */
/*****************************************************************************/
#include <time.h>
#include "externs.h"
#define load(str, typ, encl) \
sym = InsertSym(str, typ, no_fpos, DEFAULT_PREC, \
FALSE, FALSE, 0, encl, MakeWord(WORD, STR_EMPTY, no_fpos)); \
if( typ == NPAR ) visible(sym) = TRUE
#define add_par(format, val, sym) \
sprintf( (char *) buff, format, val); \
New(par, PAR); actual(par) = sym; \
Link(current_moment, par); \
tmp = MakeWord(WORD, buff, no_fpos); \
Link(par, tmp);
static OBJECT current_moment = nilobj;
static FULL_CHAR time_string[30] = { '\0' };
/*****************************************************************************/
/* */
/* OBJECT MomentSym; */
/* */
/* The symbol table entry for the @Moment symbol. */
/* */
/*****************************************************************************/
OBJECT MomentSym = nilobj;
/*****************************************************************************/
/* */
/* FULL_CHAR *TimeString() */
/* */
/* Returns a pointer to a string containing the current time. */
/* */
/*****************************************************************************/
FULL_CHAR *TimeString(void)
{ return time_string;
} /* end TimeString */
/*@::InitTime(), StartMoment()@***********************************************/
/* */
/* InitTime() */
/* */
/* Place a declaration of the @Moment symbol into the symbol table, and */
/* initialize the value of the object StartMoment. */
/* */
/*****************************************************************************/
void InitTime(void)
{ time_t raw_time; struct tm *now;
FULL_CHAR buff[20]; OBJECT par, tmp, sym, env;
OBJECT tag, second, minute, hour, weekday,
monthday, yearday, month, year, century, dst;
debug0(DTK, D, "InitTime()");
/* define @Moment symbol with its host of named parameters */
MomentSym = load(KW_MOMENT, LOCAL, StartSym);
tag = load(KW_TAG, NPAR, MomentSym);
second = load(KW_SECOND, NPAR, MomentSym);
minute = load(KW_MINUTE, NPAR, MomentSym);
hour = load(KW_HOUR, NPAR, MomentSym);
monthday = load(KW_DAY, NPAR, MomentSym);
month = load(KW_MONTH, NPAR, MomentSym);
year = load(KW_YEAR, NPAR, MomentSym);
century = load(KW_CENTURY, NPAR, MomentSym);
weekday = load(KW_WEEKDAY, NPAR, MomentSym);
yearday = load(KW_YEARDAY, NPAR, MomentSym);
dst = load(KW_DAYLIGHTSAVING, NPAR, MomentSym);
/* get current time and convert to ASCII */
if( time(&raw_time) == -1 )
Error(35, 1, "unable to obtain the current time", WARN, no_fpos);
now = localtime(&raw_time);
StringCopy(time_string, AsciiToFull(asctime(now)));
time_string[StringLength(time_string) - 1] = '\0';
/* start of current_moment */
New(current_moment, CLOSURE);
actual(current_moment) = MomentSym;
/* attach its many parameters */
add_par("%s", KW_NOW, tag);
add_par("%.2d", now->tm_sec, second);
add_par("%.2d", now->tm_min, minute);
add_par("%.2d", now->tm_hour, hour);
add_par("%d", now->tm_mday, monthday);
add_par("%d", now->tm_mon + 1, month);
add_par("%.2d", now->tm_year % 100, year);
add_par("%d", (now->tm_year+1900) / 100, century);
add_par("%d", now->tm_wday + 1, weekday);
add_par("%d", now->tm_yday, yearday);
add_par("%d", now->tm_isdst, dst);
/* add a null environment */
New(env, ENV);
AttachEnv(env, current_moment);
debug0(DTK, D, "InitTime() returning.");
debug0(DTK, DD, "current_moment =");
ifdebug(DTK, DD, DebugObject(current_moment));
} /* end InitTime */
/*****************************************************************************/
/* */
/* OBJECT StartMoment() */
/* */
/* Returns a copy of the initial time. */
/* */
/*****************************************************************************/
OBJECT StartMoment(void)
{ OBJECT res;
debug0(DTK, D, "StartMoment()");
assert(current_moment != nilobj, "StartMoment: current_moment == nilobj!");
res = CopyObject(current_moment, no_fpos);
debug0(DTK, D, "StartMoment returning");
ifdebug(DTK, D, DebugObject(res));
return res;
}