felixfoertsch/remind
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7897067eda1fc5e0bf5aafcb79b3b3876b3fd7bd
remind/main.c
dfs f32e0027ad -- Increased some static buffer sizes. 
-- Made Remind ignore trailing commas at end of tokens.
1997-07-13 16:18:48 +00:00

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42 KiB
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/***************************************************************/
/* */
/* MAIN.C */
/* */
/* Main program loop, as well as miscellaneous conversion */
/* routines, etc. */
/* */
/* This file is part of REMIND. */
/* Copyright (C) 1992-1997 by David F. Skoll */
/* */
/***************************************************************/
#include "config.h"
static char const RCSID[] = "$Id: main.c,v 1.8 1997-07-13 16:18:49 dfs Exp $";
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_UNISTD
#include <unistd.h>
#endif
#include <stdio.h>
#include <signal.h>
#include <string.h>
#ifdef HAVE_STDARG
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <ctype.h>
#include <time.h>
#ifdef AMIGA
#include <sys/types.h>
#else
#if defined(__MSDOS__) || defined(__OS2__)
#include <dos.h>
#else
#include <sys/types.h>
#ifndef SYSV
#ifdef QDOS
#include <sys/times.h>
#else
#include <sys/time.h>
#endif /* QDOS */
#endif /* ndef SYSV */
#endif /* if defined(__MSDOS__)... */
#endif /* AMIGA */
#include "types.h"
#include "protos.h"
#include "expr.h"
#include "globals.h"
#include "err.h"
PRIVATE void DoReminders ARGS ((void));
#if defined(NEED_TIMEGM) && !defined(HAVE_MKTIME)
PRIVATE long time_cheat ARGS ((int year, int month));
long timegm ARGS((struct tm *tm));
long timelocal ARGS((struct tm *tm));
#endif
static char TPushBuffer[TOKSIZE+1]; /* Buffer for pushing back a token. */
static char *TokenPushed = NULL;
/* Whooo... the putchar/Putchar/PutChar macros are a mess...
my apologies... */
#ifdef OS2_POPUP
#define Putchar(c) {if (AsPopUp) PutcPopUp(c); else putchar(c);}
#else
#define Putchar(c) PutChar(c)
#endif
/***************************************************************/
/***************************************************************/
/** **/
/** Main Program Loop **/
/** **/
/***************************************************************/
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int main(int argc, char *argv[])
#else
int main(argc, argv)
int argc;
char *argv[];
#endif
{
#ifdef HAVE_QUEUED
int pid;
#endif
/* The very first thing to do is to set up ErrFp to be stderr */
ErrFp = stderr;
/* Set up global vars */
ArgC = argc;
ArgV = argv;
InitRemind(argc, argv);
if(DoCalendar || DoSimpleCalendar) {
ProduceCalendar();
return 0;
}
/* Not doing a calendar. Do the regular remind loop */
ShouldCache = (Iterations > 1);
while (Iterations--) {
DoReminders();
if (DebugFlag & DB_DUMP_VARS) {
DumpVarTable();
DumpSysVarByName(NULL);
}
if (!Hush) {
if (DestroyOmitContexts())
Eprint("%s", ErrMsg[E_PUSH_NOPOP]);
#ifdef HAVE_QUEUED
if (!Daemon && !NextMode && !NumTriggered && !NumQueued) {
printf("%s\n", ErrMsg[E_NOREMINDERS]);
} else if (!Daemon && !NextMode && !NumTriggered) {
printf(ErrMsg[M_QUEUED], NumQueued);
}
#else
if (!NextMode && !NumTriggered) {
printf("%s\n", ErrMsg[E_NOREMINDERS]);
}
#endif
}
/* If it's MS-DOS, reset the file access date. */
/* Note that OS/2 and DOS bound programs have __MSDOS__ */
/* defined, so this test should probably be modified. */
#if defined(__MSDOS__)
if (!UseStdin && (RealToday == JulianToday))
SetAccessDate(InitialFile, RealToday);
#endif
/* If there are sorted reminders, handle them */
if (SortByDate) IssueSortedReminders();
/* If there are any background reminders queued up, handle them */
#ifdef HAVE_QUEUED
if (NumQueued || Daemon) {
if (DontFork) {
HandleQueuedReminders();
return 0;
} else {
pid = fork();
if (pid == 0) {
HandleQueuedReminders();
return 0;
}
if (pid == -1) {
fprintf(ErrFp, "%s", ErrMsg[E_CANTFORK]);
return 1;
}
}
}
#endif
if (Iterations) {
ClearGlobalOmits();
DestroyOmitContexts();
DestroyVars(0);
NumTriggered = 0;
JulianToday++;
}
}
return 0;
}
/***************************************************************/
/* */
/* DoReminders */
/* */
/* The normal case - we're not doing a calendar. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PRIVATE void DoReminders(void)
#else
static void DoReminders()
#endif
{
int r;
Token tok;
char *s;
Parser p;
if (!UseStdin) {
FileAccessDate = GetAccessDate(InitialFile);
} else {
FileAccessDate = JulianToday;
}
if (FileAccessDate < 0) {
fprintf(ErrFp, "%s: `%s'.\n", ErrMsg[E_CANTACCESS], InitialFile);
exit(1);
}
r=OpenFile(InitialFile);
if (r) {
fprintf(ErrFp, "%s %s: %s\n", ErrMsg[E_ERR_READING],
InitialFile, ErrMsg[r]);
exit(1);
}
while(1) {
r = ReadLine();
if (r == E_EOF) return;
if (r) {
Eprint("%s: %s", ErrMsg[E_ERR_READING], ErrMsg[r]);
exit(1);
}
s = FindInitialToken(&tok, CurLine);
/* Should we ignore it? */
if (NumIfs &&
tok.type != T_If &&
tok.type != T_Else &&
tok.type != T_EndIf &&
tok.type != T_IfTrig &&
ShouldIgnoreLine())
{
/*** IGNORE THE LINE ***/
}
else {
/* Create a parser to parse the line */
CreateParser(s, &p);
switch(tok.type) {
case T_Empty:
case T_Comment:
break;
case T_Rem: r=DoRem(&p); break;
case T_ErrMsg: r=DoErrMsg(&p); break;
case T_If: r=DoIf(&p); break;
case T_IfTrig: r=DoIfTrig(&p); break;
case T_Else: r=DoElse(&p); break;
case T_EndIf: r=DoEndif(&p); break;
case T_Include: r=DoInclude(&p); break;
case T_Exit: DoExit(&p); break;
case T_Flush: r=DoFlush(&p); break;
case T_Set: r=DoSet(&p); break;
case T_Fset: r=DoFset(&p); break;
case T_UnSet: r=DoUnset(&p); break;
case T_Clr: r=DoClear(&p); break;
case T_Debug: r=DoDebug(&p); break;
case T_Dumpvars: r=DoDump(&p); break;
case T_Banner: r=DoBanner(&p); break;
case T_Omit: r=DoOmit(&p);
if (r == E_PARSE_AS_REM) {
DestroyParser(&p);
CreateParser(s, &p);
r=DoRem(&p);
}
break;
case T_Pop: r=PopOmitContext(&p); break;
case T_Preserve: r=DoPreserve(&p); break;
case T_Push: r=PushOmitContext(&p); break;
case T_RemType: if (tok.val == RUN_TYPE) {
r=DoRun(&p);
break;
} else {
CreateParser(CurLine, &p);
r=DoRem(&p);
break;
}
/* If we don't recognize the command, do a REM by default */
/* Note: Since the parser hasn't been used yet, we don't */
/* need to destroy it here. */
default: CreateParser(CurLine, &p); r=DoRem(&p); break;
}
if (r && (!Hush || r != E_RUN_DISABLED)) {
Eprint("%s", ErrMsg[r]);
}
/* Destroy the parser - free up resources it may be tying up */
DestroyParser(&p);
}
}
}
/***************************************************************/
/* */
/* Julian */
/* */
/* Given day, month, year, return Julian date in days since */
/* 1 January 1990. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int Julian(int year, int month, int day)
#else
int Julian(year, month, day)
int day, month, year;
#endif
{
int y1 = BASE-1, y2 = year-1;
int y4 = (y2 / 4) - (y1 / 4); /* Correct for leap years */
int y100 = (y2 / 100) - (y1 / 100); /* Don't count multiples of 100... */
int y400 = (y2 / 400) - (y1 / 400); /* ... but do count multiples of 400 */
return 365 * (year-BASE) + y4 - y100 + y400 +
MonthIndex[IsLeapYear(year)][month] + day - 1;
}
/***************************************************************/
/* */
/* FromJulian */
/* */
/* Convert a Julian date to year, month, day. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void FromJulian(int jul, int *y, int *m, int *d)
#else
void FromJulian(jul, y, m, d)
int jul;
int *y, *m, *d;
#endif
{
int try_yr = (jul / 365) + BASE;
int try_mon = 0;
int t;
/* Inline code for speed... */
int y1 = BASE-1, y2 = try_yr-1;
int y4 = (y2 / 4) - (y1 / 4); /* Correct for leap years */
int y100 = (y2 / 100) - (y1 / 100); /* Don't count multiples of 100... */
int y400 = (y2 / 400) - (y1 / 400); /* ... but do count multiples of 400 */
int try_jul= 365 * (try_yr-BASE) + y4 - y100 + y400;
while (try_jul > jul) {
try_yr--;
try_jul -= DaysInYear(try_yr);
}
jul -= try_jul;
t = DaysInMonth(try_mon, try_yr);
while (jul >= t) {
jul -= t;
try_mon++;
t = DaysInMonth(try_mon, try_yr);
}
*y = try_yr;
*m = try_mon;
*d = jul + 1;
return;
}
/***************************************************************/
/* */
/* ParseChar */
/* */
/* Parse a character from a parse pointer. If peek is non- */
/* zero, then just peek ahead; don't advance pointer. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int ParseChar(ParsePtr p, int *err, int peek)
#else
int ParseChar(p, err, peek)
ParsePtr p;
int *err;
int peek;
#endif
{
Value val;
int r;
*err = 0;
if (TokenPushed && *TokenPushed)
if (peek) return *TokenPushed;
else return *TokenPushed++;
while(1) {
if (p->isnested) {
if (*(p->epos)) {
if (peek) {
return *(p->epos);
} else {
return *(p->epos++);
}
}
free(p->etext); /* End of substituted expression */
p->etext = NULL;
p->epos = NULL;
p->isnested = 0;
}
if (!*(p->pos)) {
return 0;
}
if (*p->pos != BEG_OF_EXPR || !p->allownested) {
if (peek) {
return *(p->pos);
} else {
return *(p->pos++);
}
}
p->pos++;
r = EvalExpr(&(p->pos), &val);
if (r) {
*err = r;
DestroyParser(p);
return 0;
}
if (*p->pos != END_OF_EXPR) {
*err = E_MISS_END;
DestroyParser(p);
DestroyValue(val);
return 0;
}
p->pos++;
r = DoCoerce(STR_TYPE, &val);
if (r) { *err = r; return 0; }
p->etext = val.v.str;
val.type = ERR_TYPE; /* So it's not accidentally destroyed! */
p->isnested = 1;
p->epos = p->etext;
}
}
/***************************************************************/
/* */
/* ParseNonSpaceChar */
/* */
/* Parse the next non-space character. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int ParseNonSpaceChar(ParsePtr p, int *err, int peek)
#else
int ParseNonSpaceChar(p, err, peek)
ParsePtr p;
int *err;
int peek;
#endif
{
int ch;
ch = ParseChar(p, err, 1);
if (*err) return 0;
while (isspace(ch)) {
ParseChar(p, err, 0); /* Guaranteed to work */
ch = ParseChar(p, err, 1);
if (*err) return 0;
}
if (!peek) ch = ParseChar(p, err, 0); /* Guaranteed to work */
return ch;
}
/***************************************************************/
/* */
/* ParseToken */
/* */
/* Parse a token delimited by whitespace. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int ParseToken(ParsePtr p, char *out)
#else
int ParseToken(p, out)
ParsePtr p;
char *out;
#endif
{
int c, err;
int len = 0;
*out = 0;
c = ParseChar(p, &err, 0);
if (err) return err;
while (c && isspace(c)) {
c = ParseChar(p, &err, 0);
if (err) return err;
}
if (!c) return OK;
*out++ = c;
len++;
while (c && !isspace(c)) {
c = ParseChar(p, &err, 0);
if (err) return err;
if (len < TOKSIZE && c && !isspace(c)) {
*out++ = c;
len++;
}
}
/* Ignore trailing commas */
if (len > 0 && *(out-1) == ',') {
out--;
}
*out = 0;
return OK;
}
/***************************************************************/
/* */
/* ParseIdentifier */
/* */
/* Parse a valid identifier - ie, alpha or underscore */
/* followed by alphanum. Return E_BAD_ID if identifier is */
/* invalid. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int ParseIdentifier(ParsePtr p, char *out)
#else
int ParseIdentifier(p, out)
ParsePtr p;
char *out;
#endif
{
int c, err;
int len = 0;
*out = 0;
c = ParseChar(p, &err, 0);
if (err) return err;
while (c && isspace(c)) {
c = ParseChar(p, &err, 0);
if (err) return err;
}
if (!c) return E_EOLN;
if (c != '$' && c != '_' && !isalpha(c)) return E_BAD_ID;
*out++ = c;
*out = 0;
len++;
while (1) {
c = ParseChar(p, &err, 1);
if (err) return err;
if (c != '_' && !isalnum(c)) return OK;
if (len < TOKSIZE) {
c = ParseChar(p, &err, 0); /* Guaranteed to work */
*out++ = c;
*out = 0;
len++;
}
}
}
/***************************************************************/
/* */
/* EvaluateExpr */
/* */
/* We are expecting an expression here. Evaluate it and */
/* return the value. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int EvaluateExpr(ParsePtr p, Value *v)
#else
int EvaluateExpr(p, v)
ParsePtr p;
Value *v;
#endif
{
int bracketed = 0;
int r;
if (p->isnested) return E_PARSE_ERR; /* Can't nest expressions */
while (isspace(*p->pos)) (p->pos)++;
if (!p->pos) return E_PARSE_ERR; /* Missing expression */
if (*p->pos == BEG_OF_EXPR) {
(p->pos)++;
bracketed = 1;
}
r = EvalExpr(&(p->pos), v);
if (r) return r;
if (bracketed) {
if (*p->pos != END_OF_EXPR) return E_MISS_END;
(p->pos)++;
}
return OK;
}
/***************************************************************/
/* */
/* Eprint - print an error message. */
/* */
/***************************************************************/
#ifdef HAVE_STDARG
#ifdef HAVE_PROTOS
PUBLIC void Eprint(const char *fmt, ...)
#else
void Eprint(fmt)
char *fmt;
#endif
#else
/*VARARGS0*/
void Eprint(va_alist)
va_dcl
#endif
{
va_list argptr;
#ifndef HAVE_STDARG
char *fmt;
#endif
/* Check if more than one error msg. from this line */
if (!FreshLine && !ShowAllErrors) return;
if (FreshLine) {
FreshLine = 0;
if (strcmp(FileName, "-"))
(void) fprintf(ErrFp, "%s(%d): ", FileName, LineNo);
else
(void) fprintf(ErrFp, "-stdin-(%d): ", LineNo);
if (DebugFlag & DB_PRTLINE) OutputLine(ErrFp);
} else fprintf(ErrFp, " ");
#ifdef HAVE_STDARG
va_start(argptr, fmt);
#else
va_start(argptr);
fmt = va_arg(argptr, char *);
#endif
(void) vfprintf(ErrFp, fmt, argptr);
(void) fputc('\n', ErrFp);
#ifndef HAVE_STDARG
va_end(argptr);
#endif
return;
}
/***************************************************************/
/* */
/* OutputLine */
/* */
/* Output a line from memory buffer to a file pointer. This */
/* simply involves escaping newlines. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void OutputLine(FILE *fp)
#else
void OutputLine(fp)
FILE *fp;
#endif
{
register char *s = CurLine;
register char c = 0;
while (*s) {
if (*s == '\n') Putc('\\', fp);
Putc(*s, fp);
c = *s++;
}
if (c != '\n') Putc('\n', fp);
}
/***************************************************************/
/* */
/* CreateParser */
/* */
/* Create a parser given a string buffer */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void CreateParser(char *s, ParsePtr p)
#else
void CreateParser(s, p)
char *s;
ParsePtr p;
#endif
{
p->text = s;
p->pos = s;
p->isnested = 0;
p->epos = NULL;
p->etext = NULL;
p->allownested = 1;
TokenPushed = NULL;
}
/***************************************************************/
/* */
/* DestroyParser */
/* */
/* Destroy a parser, freeing up resources used. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void DestroyParser(ParsePtr p)
#else
void DestroyParser(p)
ParsePtr p;
#endif
{
if (p->isnested && p->etext) {
free(p->etext);
p->etext = NULL;
p->isnested = 0;
}
}
/***************************************************************/
/* */
/* PushToken - one level of token pushback. This is */
/* GLOBAL, not on a per-parser basis. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void PushToken(const char *tok)
#else
void PushToken(tok)
char *tok;
#endif
{
TokenPushed = TPushBuffer;
strcpy(TPushBuffer, tok);
strcat(TPushBuffer, " "); /* Separate the pushed token from the next
token */
}
/***************************************************************/
/* */
/* SystemTime */
/* */
/* Return the system time in seconds past midnight */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC long SystemTime(int realtime)
#else
long SystemTime(realtime)
int realtime;
#endif
{
#if defined( __MSDOS__ ) && defined( __TURBOC__ )
/* Get time in Turbo C */
struct time t;
/* If time was supplied on command line, return it. */
if (!realtime && (SysTime != -1L)) return SysTime;
gettime(&t);
return (long) t.ti_hour * 3600L + (long) t.ti_min * 60L +
(long) t.ti_sec;
#else
/* Get time in Unix or with MSC */
time_t tloc;
struct tm *t;
if (!realtime && (SysTime != -1L)) return SysTime;
(void) time(&tloc);
t = localtime(&tloc);
return (long) t->tm_hour * 3600L + (long) t->tm_min * 60L +
(long) t->tm_sec;
#endif
}
/***************************************************************/
/* */
/* SystemDate */
/* */
/* Obtains today's date. Returns Julian date or -1 for */
/* failure. (Failure happens if sys date is before BASE */
/* year.) */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int SystemDate(int *y, int *m, int *d)
#else
int SystemDate(y, m, d)
int *d;
int *m;
int *y;
#endif
{
#if defined( __MSDOS__ ) && defined( __TURBOC__ )
/* Get today's date in Turbo C */
struct date da;
getdate(&da);
*y = da.da_year;
*m = da.da_mon - 1;
*d = da.da_day;
#else
/* Get today's date in UNIX or with MSC */
time_t tloc;
struct tm *t;
(void) time(&tloc);
t = localtime(&tloc);
*d = t->tm_mday;
*m = t->tm_mon;
*y = t->tm_year + 1900;
#endif
return Julian(*y, *m, *d);
}
/***************************************************************/
/* */
/* DoIf - handle the IF command. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoIf(ParsePtr p)
#else
int DoIf(p)
ParsePtr p;
#endif
{
Value v;
int r;
unsigned syndrome;
if (NumIfs >= IF_NEST) return E_NESTED_IF;
if (ShouldIgnoreLine()) syndrome = IF_TRUE | BEFORE_ELSE;
else {
if ( (r = EvaluateExpr(p, &v)) ) {
syndrome = IF_TRUE | BEFORE_ELSE;
Eprint("%s", ErrMsg[r]);
} else
if ( (v.type != STR_TYPE && v.v.val) ||
(v.type == STR_TYPE && strcmp(v.v.str, "")) )
syndrome = IF_TRUE | BEFORE_ELSE;
else
syndrome = IF_FALSE | BEFORE_ELSE;
}
NumIfs++;
IfFlags &= ~(IF_MASK << (2*NumIfs - 2));
IfFlags |= syndrome << (2 * NumIfs - 2);
if (ShouldIgnoreLine()) return OK;
return VerifyEoln(p);
}
/***************************************************************/
/* */
/* DoElse - handle the ELSE command. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoElse(ParsePtr p)
#else
int DoElse(p)
ParsePtr p;
#endif
{
unsigned syndrome;
if (!NumIfs) return E_ELSE_NO_IF;
syndrome = IfFlags >> (2 * NumIfs - 2);
if ((syndrome & IF_ELSE_MASK) == AFTER_ELSE) return E_ELSE_NO_IF;
IfFlags |= AFTER_ELSE << (2 * NumIfs - 2);
return VerifyEoln(p);
}
/***************************************************************/
/* */
/* DoEndif - handle the Endif command. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoEndif(ParsePtr p)
#else
int DoEndif(p)
ParsePtr p;
#endif
{
if (!NumIfs) return E_ENDIF_NO_IF;
NumIfs--;
return VerifyEoln(p);
}
/***************************************************************/
/* */
/* DoIfTrig */
/* */
/* Handle the IFTRIG command. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoIfTrig(ParsePtr p)
#else
int DoIfTrig(p)
ParsePtr p;
#endif
{
int r;
unsigned syndrome;
Trigger trig;
TimeTrig tim;
int jul;
if (NumIfs >= IF_NEST) return E_NESTED_IF;
if (ShouldIgnoreLine()) syndrome = IF_TRUE | BEFORE_ELSE;
else {
if ( (r=ParseRem(p, &trig, &tim)) ) return r;
if (trig.typ != NO_TYPE) return E_PARSE_ERR;
jul = ComputeTrigger(trig.scanfrom, &trig, &r);
if (r) syndrome = IF_TRUE | BEFORE_ELSE;
else {
if (ShouldTriggerReminder(&trig, &tim, jul))
syndrome = IF_TRUE | BEFORE_ELSE;
else
syndrome = IF_FALSE | BEFORE_ELSE;
}
}
NumIfs++;
IfFlags &= ~(IF_MASK << (2*NumIfs - 2));
IfFlags |= syndrome << (2 * NumIfs - 2);
return OK;
}
/***************************************************************/
/* */
/* ShouldIgnoreLine - given the current state of the IF */
/* stack, should we ignore the current line? */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int ShouldIgnoreLine(void)
#else
int ShouldIgnoreLine()
#endif
{
register int i, syndrome;
/* Algorithm - go from outer to inner, and if any should be ignored, then
ignore the whole. */
for (i=0; i<NumIfs; i++) {
syndrome = (IfFlags >> (i*2)) & IF_MASK;
if (syndrome == IF_TRUE+AFTER_ELSE ||
syndrome == IF_FALSE+BEFORE_ELSE) return 1;
}
return 0;
}
/***************************************************************/
/* */
/* VerifyEoln */
/* */
/* Verify that current line contains no more tokens. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int VerifyEoln(ParsePtr p)
#else
int VerifyEoln(p)
ParsePtr p;
#endif
{
int r;
if ( (r = ParseToken(p, TokBuffer)) ) return r;
if (*TokBuffer && (*TokBuffer != '#') && (*TokBuffer != ';')) {
Eprint("%s: `%s'", ErrMsg[E_EXPECTING_EOL], TokBuffer);
return E_EXTRANEOUS_TOKEN;
}
return OK;
}
/***************************************************************/
/* */
/* DoDebug */
/* */
/* Set the debug options under program control. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoDebug(ParsePtr p)
#else
int DoDebug(p)
ParsePtr p;
#endif
{
int err;
int ch;
int val=1;
while(1) {
ch = ParseChar(p, &err, 0);
if (err) return err;
switch(ch) {
case '#':
case ';':
case 0:
return OK;
case ' ':
case '\t':
break;
case '+':
val = 1;
break;
case '-':
val = 0;
break;
case 'e':
case 'E':
if (val) DebugFlag |= DB_ECHO_LINE;
else DebugFlag &= ~DB_ECHO_LINE;
break;
case 'x':
case 'X':
if (val) DebugFlag |= DB_PRTEXPR;
else DebugFlag &= ~DB_PRTEXPR;
break;
case 't':
case 'T':
if (val) DebugFlag |= DB_PRTTRIG;
else DebugFlag &= ~DB_PRTTRIG;
break;
case 'v':
case 'V':
if (val) DebugFlag |= DB_DUMP_VARS;
else DebugFlag &= ~DB_DUMP_VARS;
break;
case 'l':
case 'L':
if (val) DebugFlag |= DB_PRTLINE;
else DebugFlag &= ~DB_PRTLINE;
break;
}
}
}
/***************************************************************/
/* */
/* DoBanner */
/* */
/* Set the banner to be printed just before the first */
/* reminder is issued. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoBanner(ParsePtr p)
#else
int DoBanner(p)
ParsePtr p;
#endif
{
int err;
int c;
char buf[LINELEN]; /* So we don't mess up the banner if an error occurs */
char *s;
c = ParseChar(p, &err, 0);
if (err) return err;
while (isspace(c)) {
c = ParseChar(p, &err, 0);
if (err) return err;
}
if (!c) return E_EOLN;
s = buf;
while(c) {
*s++ = c;
c = ParseChar(p, &err, 0);
if (err) return err;
}
*s++ = 0;
strcpy(Banner, buf);
return OK;
}
/***************************************************************/
/* */
/* DoRun */
/* */
/* Enable or disable the RUN command under program control */
/* */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoRun(ParsePtr p)
#else
int DoRun(p)
ParsePtr p;
#endif
{
int r;
if ( (r=ParseToken(p, TokBuffer)) ) return r;
/* Only allow RUN ON in top-level script */
if (! StrCmpi(TokBuffer, "ON")) {
if (TopLevel()) RunDisabled &= ~RUN_SCRIPT;
}
/* But allow RUN OFF anywhere */
else if (! StrCmpi(TokBuffer, "OFF"))
RunDisabled |= RUN_SCRIPT;
else return E_PARSE_ERR;
return VerifyEoln(p);
}
/***************************************************************/
/* */
/* DoFlush */
/* */
/* Flush stdout and stderr */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoFlush(ParsePtr p)
#else
int DoFlush(p)
ParsePtr p;
#endif
{
fflush(stdout);
fflush(stderr);
return VerifyEoln(p);
}
/***************************************************************/
/* */
/* DoExit */
/* */
/* Handle the EXIT command. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void DoExit(ParsePtr p)
#else
void DoExit(p)
ParsePtr p;
#endif
{
int r;
Value v;
r = EvaluateExpr(p, &v);
if (r || v.type != INT_TYPE) exit(99);
exit(v.v.val);
}
/***************************************************************/
/* */
/* DoErrMsg */
/* */
/* Issue an error message under program control. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC int DoErrMsg(ParsePtr p)
#else
int DoErrMsg(p)
ParsePtr p;
#endif
{
TimeTrig tt;
Trigger t;
int r;
char *s;
t.typ = MSG_TYPE;
tt.ttime = SystemTime(0) / 60;
if ( (r=DoSubst(p, SubstBuffer, &t, &tt, JulianToday, NORMAL_MODE)) )
return r;
s = SubstBuffer;
while (isspace(*s)) s++;
fprintf(ErrFp, "%s\n", s);
return OK;
}
/***************************************************************/
/* */
/* CalcMinsFromUTC */
/* */
/* Attempt to calculate the minutes from UTC for a specific */
/* date. */
/* */
/***************************************************************/
/* The array FoldArray[2][7] contains sample years which begin
on the specified weekday. For example, FoldArray[0][2] is a
non-leapyear beginning on Wednesday, and FoldArray[1][5] is a
leapyear beginning on Saturday. Used to fold back dates which
are too high for the standard Unix representation.
NOTE: This implies that you cannot set BASE > 2001!!!!! */
static int FoldArray[2][7] = {
{2001, 2002, 2003, 2009, 2010, 2005, 2006},
{2024, 2008, 2020, 2004, 2016, 2000, 2012}
};
#ifdef HAVE_PROTOS
PUBLIC int CalcMinsFromUTC(int jul, int tim, int *mins, int *isdst)
#else
int CalcMinsFromUTC(jul, tim, mins, isdst)
int jul, tim, *mins, *isdst;
#endif
{
/* Convert jul and tim to an Unix tm struct */
int yr, mon, day;
int tdiff;
struct tm local, utc, *temp;
time_t loc_t, utc_t;
FromJulian(jul, &yr, &mon, &day);
/* If the year is greater than 2037, some Unix machines have problems.
Fold it back to a "similar" year and trust that the UTC calculations
are still valid... */
if (FoldYear && yr>2037) {
jul = Julian(yr, 0, 1);
yr = FoldArray[IsLeapYear(yr)][jul%7];
}
local.tm_sec = 0;
local.tm_min = tim % 60;
local.tm_hour = tim / 60;
local.tm_mday = day;
local.tm_mon = mon;
local.tm_year = yr-1900;
local.tm_isdst = -1; /* We don't know whether or not dst is in effect */
#if !defined(HAVE_MKTIME)
loc_t = timelocal(&local);
local.tm_isdst = 0;
utc_t = timegm(&local);
#else
loc_t = mktime(&local);
if (loc_t == -1) return 1;
temp = gmtime(&loc_t);
utc = *temp;
utc.tm_isdst = 0;
utc_t = mktime(&utc);
if (utc_t == -1) return 1;
#endif
temp = localtime(&loc_t);
/* Compute difference between local time and UTC in seconds.
Be careful, since time_t might be unsigned. */
#ifdef HAVE_MKTIME
/* If we have mktime(), then we have difftime(), so use it! */
tdiff = (int) difftime(loc_t, utc_t);
if (mins) *mins = (int)(((temp->tm_isdst) ? 60 : 0) + tdiff / 60 );
#else
/* If we don't have mktime(), we probably don't have difftime(),
so use this rather non-portable code. */
if (loc_t < utc_t) {
tdiff = - (int) (utc_t - loc_t);
} else {
tdiff = (int) (loc_t - utc_t);
}
if (mins) *mins = (int)(tdiff / 60);
#endif
if (isdst) *isdst = temp->tm_isdst;
return 0;
}
/***************************************************************/
/* */
/* FillParagraph */
/* */
/* Write a string to standard output, formatting it as a */
/* paragraph according to the FirstIndent, FormWidth and */
/* SubsIndent variables. Spaces are gobbled. Double-spaces */
/* are inserted after '.', '?' and '!'. Newlines in the */
/* source are treated as paragraph breaks. */
/* */
/***************************************************************/
/* A macro safe ONLY if used with arg with no side effects! */
#define ISBLANK(c) (isspace(c) && (c) != '\n')
#ifdef HAVE_PROTOS
#ifdef OS2_POPUP
PUBLIC void FillParagraph(char *s, int AsPopUp)
#else
PUBLIC void FillParagraph(char *s)
#endif
#else
#ifdef OS2_POPUP
void FillParagraph(s, AsPopUp)
char *s;
int AsPopUp;
#else
void FillParagraph(s)
char *s;
#endif
#endif
{
int line = 0;
int i, j;
int doublespace = 1;
int pendspace;
int len;
char *t;
int roomleft;
if (!s || !*s) return;
/* Skip leading spaces */
while(ISBLANK(*s)) s++;
/* Start formatting */
while(1) {
/* If it's a carriage return, output it and start new paragraph */
if (*s == '\n') {
Putchar('\n');
s++;
line = 0;
while(ISBLANK(*s)) s++;
continue;
}
if (!*s) {
return;
}
/* Over here, we're at the beginning of a line. Emit the correct
number of spaces */
j = line ? SubsIndent : FirstIndent;
for (i=0; i<j; i++) {
Putchar(' ');
}
/* Calculate the amount of room left on this line */
roomleft = FormWidth - j;
pendspace = 0;
/* Emit words until the next one won't fit */
while(1) {
while(ISBLANK(*s)) s++;
if (*s == '\n') break;
t = s;
while(*s && !isspace(*s)) s++;
len = s - t;
if (!len) {
return;
}
if (!pendspace || len+pendspace <= roomleft) {
for (i=0; i<pendspace; i++) {
Putchar(' ');
}
while(t < s) {
Putchar(*t);
if (strchr(EndSent, *t)) doublespace = 2;
else if (!strchr(EndSentIg, *t)) doublespace = 1;
t++;
}
} else {
s = t;
Putchar('\n');
line++;
break;
}
roomleft -= len+doublespace;
pendspace = doublespace;
}
}
}
#if defined(NEED_TIMEGM) && !defined(HAVE_MKTIME)
#define TGM_SEC (1)
#define TGM_MIN (60 * TGM_SEC)
#define TGM_HR (60 * TGM_MIN)
#define TGM_DAY (24 * TGM_HR)
#ifdef HAVE_PROTOS
PRIVATE long time_cheat(int year, int month)
#else
static long time_cheat (year, month)
int year;
int month;
#endif
{
long guess = time((long *) NULL);
struct tm g;
int diff;
g = *gmtime (&guess);
while ((diff = year - g.tm_year) > 0)
{
guess += diff * (363 - TGM_DAY);
g = *gmtime (&guess);
}
g.tm_mday--;
guess -= g.tm_sec * TGM_SEC + g.tm_min * TGM_MIN +
g.tm_hour * TGM_HR + g.tm_mday * TGM_DAY;
return (guess);
}
#ifdef HAVE_PROTOS
PUBLIC long timegm (struct tm *tm)
#else
long timegm(tm)
struct tm *tm;
#endif
{
long clock = time_cheat (tm->tm_year, tm->tm_mon);
return (clock + tm->tm_sec * TGM_SEC +
tm->tm_min * TGM_MIN +
tm->tm_hour * TGM_HR +
(tm->tm_mday - 1) * TGM_DAY);
}
#ifdef HAVE_PROTOS
PUBLIC long timelocal (struct tm *tm)
#else
long timelocal (tm)
struct tm *tm;
#endif
{
long zero = 0;
struct tm epoch;
int tzmin;
long clock;
struct tm test;
epoch = *localtime (&zero);
tzmin = epoch.tm_hour * 60 + epoch.tm_min;
if (tzmin > 0)
{
tzmin = 24 * 60 - tzmin;
if (epoch.tm_year == 70)
tzmin -= 24 * 60;
}
clock = timegm (tm) + tzmin * TGM_MIN;
test = *localtime (&clock);
if (test.tm_hour != tm->tm_hour)
clock -= TGM_HR;
return (clock);
}
#endif /* NEED_TIMEGM */
/***************************************************************/
/* */
/* LocalToUTC */
/* */
/* Convert a local date/time to a UTC date/time. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void LocalToUTC(int locdate, int loctime, int *utcdate, int *utctime)
#else
void LocalToUTC(locdate, loctime, utcdate, utctime)
int locdate, loctime, *utcdate, *utctime;
#endif
{
int diff;
int dummy;
if (!CalculateUTC || CalcMinsFromUTC(locdate, loctime, &diff, &dummy))
diff=MinsFromUTC;
loctime -= diff;
if (loctime < 0) {
loctime += 1440;
locdate--;
} else if (loctime >= 1440) {
loctime -= 1440;
locdate++;
}
*utcdate = locdate;
*utctime = loctime;
}
/***************************************************************/
/* */
/* UTCToLocal */
/* */
/* Convert a UTC date/time to a local date/time. */
/* */
/***************************************************************/
#ifdef HAVE_PROTOS
PUBLIC void UTCToLocal(int utcdate, int utctime, int *locdate, int *loctime)
#else
void UTCToLocal(utcdate, utctime, locdate, loctime)
int utcdate, utctime, *locdate, *loctime;
#endif
{
int diff;
int dummy;
/* Hack -- not quite right when DST changes. */
if (!CalculateUTC || CalcMinsFromUTC(utcdate, utctime, &diff, &dummy))
diff=MinsFromUTC;
utctime += diff;
if (utctime < 0) {
utctime += 1440;
utcdate--;
} else if (utctime >= 1440) {
utctime -= 1440;
utcdate++;
}
*locdate = utcdate;
*loctime = utctime;
}
/***************************************************************/
/* */
/* SigIntHandler */
/* */
/* For debugging purposes, when sent a SIGINT, we print the */
/* contents of the queue. This does NOT work when the -f */
/* command-line flag is supplied. */
/* */
/* For OS/2, this has to be in the main thread. */
/* */
/***************************************************************/
#ifdef HAVE_QUEUED
#ifdef __BORLANDC__
void __cdecl SigIntHandler(int d)
#else
#ifdef HAVE_PROTOS
#ifdef SIGHANDLER_INT_ARG
void SigIntHandler(int d)
#else
void SigIntHandler(void)
#endif
#else
void SigIntHandler()
#endif
#endif
{
#ifdef SYSV
signal(SIGINT, SigIntHandler);
#else
#ifdef __BORLANDC__
signal(SIGINT, SIG_DFL);
#else
#ifdef __OS2__
signal(SIGINT, SIG_ACK);
#endif
#endif
#endif
GotSigInt();
#ifndef UNIX
exit(0);
#endif
}
#endif /* HAVE_QUEUED */
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