File: z35.c

package info (click to toggle)
lout 3.25-1
  • links: PTS
  • area: main
  • in suites: woody
  • size: 9,252 kB
  • ctags: 3,152
  • sloc: ansic: 31,182; makefile: 254; awk: 83
file content (152 lines) | stat: -rw-r--r-- 7,842 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*@z35.c:Time Keeper: MomentSym(), TimeString()@******************************/
/*                                                                           */
/*  THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.25)                       */
/*  COPYRIGHT (C) 1991, 2001 Jeffrey H. Kingston                             */
/*                                                                           */
/*  Jeffrey H. Kingston (jeff@cs.usyd.edu.au)                                */
/*  Basser Department of Computer Science                                    */
/*  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 2, 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;
}