4.3BSD-Tahoe/usr/src/etc/tzone/zic.c
#ifndef lint
static char sccsid[] = "@(#)zic.c 1.3 (Berkeley) 10/22/87";
#endif
#include "stdio.h"
#include "ctype.h"
#include "sys/types.h"
#include "sys/stat.h"
#include "sys/file.h"
#include "strings.h"
#include "time.h"
#include "tzfile.h"
#ifndef BUFSIZ
#define BUFSIZ 1024
#endif
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
extern char * icpyalloc();
extern char * imalloc();
extern char * irealloc();
extern char * optarg;
extern int optind;
extern char * scheck();
static addtt();
static addtype();
static associate();
static int charcnt;
static ciequal();
static long eitol();
static int errors;
static char * filename;
static char ** getfields();
static long gethms();
static infile();
static inlink();
static inrule();
static inzcont();
static inzone();
static inzsub();
static int linenum;
static lowerit();
static time_t max_time;
static int max_year;
static time_t min_time;
static int min_year;
static mkdirs();
static newabbr();
static int noise;
static nondunlink();
static long oadd();
static outzone();
static char * progname;
static char * rfilename;
static int rlinenum;
static time_t rpytime();
static rulesub();
static setboundaries();
static time_t tadd();
static int timecnt;
static int tt_signed;
static int typecnt;
static yearistype();
/*
** Line codes.
*/
#define LC_RULE 0
#define LC_ZONE 1
#define LC_LINK 2
/*
** Which fields are which on a Zone line.
*/
#define ZF_NAME 1
#define ZF_GMTOFF 2
#define ZF_RULE 3
#define ZF_FORMAT 4
#define ZF_UNTILYEAR 5
#define ZF_UNTILMONTH 6
#define ZF_UNTILDAY 7
#define ZF_UNTILTIME 8
#define ZONE_MINFIELDS 5
#define ZONE_MAXFIELDS 9
/*
** Which fields are which on a Zone continuation line.
*/
#define ZFC_GMTOFF 0
#define ZFC_RULE 1
#define ZFC_FORMAT 2
#define ZFC_UNTILYEAR 3
#define ZFC_UNTILMONTH 4
#define ZFC_UNTILDAY 5
#define ZFC_UNTILTIME 6
#define ZONEC_MINFIELDS 3
#define ZONEC_MAXFIELDS 7
/*
** Which files are which on a Rule line.
*/
#define RF_NAME 1
#define RF_LOYEAR 2
#define RF_HIYEAR 3
#define RF_COMMAND 4
#define RF_MONTH 5
#define RF_DAY 6
#define RF_TOD 7
#define RF_STDOFF 8
#define RF_ABBRVAR 9
#define RULE_FIELDS 10
/*
** Which fields are which on a Link line.
*/
#define LF_FROM 1
#define LF_TO 2
#define LINK_FIELDS 3
struct rule {
char * r_filename;
int r_linenum;
char * r_name;
int r_loyear; /* for example, 1986 */
int r_hiyear; /* for example, 1986 */
char * r_yrtype;
int r_month; /* 0..11 */
int r_dycode; /* see below */
int r_dayofmonth;
int r_wday;
long r_tod; /* time from midnight */
int r_todisstd; /* above is standard time if TRUE */
/* above is wall clock time if FALSE */
long r_stdoff; /* offset from standard time */
char * r_abbrvar; /* variable part of time zone abbreviation */
int r_todo; /* a rule to do (used in outzone) */
time_t r_temp; /* used in outzone */
};
/*
** r_dycode r_dayofmonth r_wday
*/
#define DC_DOM 0 /* 1..31 */ /* unused */
#define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
#define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
/*
** Year synonyms.
*/
#define YR_MINIMUM 0
#define YR_MAXIMUM 1
#define YR_ONLY 2
static struct rule * rules;
static int nrules; /* number of rules */
struct zone {
char * z_filename;
int z_linenum;
char * z_name;
long z_gmtoff;
char * z_rule;
char * z_format;
long z_stdoff;
struct rule * z_rules;
int z_nrules;
struct rule z_untilrule;
time_t z_untiltime;
};
static struct zone * zones;
static int nzones; /* number of zones */
struct link {
char * l_filename;
int l_linenum;
char * l_from;
char * l_to;
};
static struct link * links;
static int nlinks;
struct lookup {
char * l_word;
int l_value;
};
static struct lookup * byword();
static struct lookup line_codes[] = {
"Rule", LC_RULE,
"Zone", LC_ZONE,
"Link", LC_LINK,
NULL, 0
};
static struct lookup mon_names[] = {
"January", TM_JANUARY,
"February", TM_FEBRUARY,
"March", TM_MARCH,
"April", TM_APRIL,
"May", TM_MAY,
"June", TM_JUNE,
"July", TM_JULY,
"August", TM_AUGUST,
"September", TM_SEPTEMBER,
"October", TM_OCTOBER,
"November", TM_NOVEMBER,
"December", TM_DECEMBER,
NULL, 0
};
static struct lookup wday_names[] = {
"Sunday", TM_SUNDAY,
"Monday", TM_MONDAY,
"Tuesday", TM_TUESDAY,
"Wednesday", TM_WEDNESDAY,
"Thursday", TM_THURSDAY,
"Friday", TM_FRIDAY,
"Saturday", TM_SATURDAY,
NULL, 0
};
static struct lookup lasts[] = {
"last-Sunday", TM_SUNDAY,
"last-Monday", TM_MONDAY,
"last-Tuesday", TM_TUESDAY,
"last-Wednesday", TM_WEDNESDAY,
"last-Thursday", TM_THURSDAY,
"last-Friday", TM_FRIDAY,
"last-Saturday", TM_SATURDAY,
NULL, 0
};
static struct lookup begin_years[] = {
"minimum", YR_MINIMUM,
"maximum", YR_MAXIMUM,
NULL, 0
};
static struct lookup end_years[] = {
"minimum", YR_MINIMUM,
"maximum", YR_MAXIMUM,
"only", YR_ONLY,
NULL, 0
};
static int len_months[2][MONS_PER_YEAR] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
static int len_years[2] = {
DAYS_PER_NYEAR, DAYS_PER_LYEAR
};
static time_t ats[TZ_MAX_TIMES];
static unsigned char types[TZ_MAX_TIMES];
static long gmtoffs[TZ_MAX_TYPES];
static char isdsts[TZ_MAX_TYPES];
static char abbrinds[TZ_MAX_TYPES];
static char chars[TZ_MAX_CHARS];
/*
** Memory allocation.
*/
static char *
memcheck(ptr)
char * ptr;
{
if (ptr == NULL) {
perror(progname);
exit(1);
}
return ptr;
}
#define emalloc(size) memcheck(imalloc(size))
#define erealloc(ptr, size) memcheck(irealloc(ptr, size))
#define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
/*
** Error handling.
*/
static
eats(name, num, rname, rnum)
char * name;
char * rname;
{
filename = name;
linenum = num;
rfilename = rname;
rlinenum = rnum;
}
static
eat(name, num)
char * name;
{
eats(name, num, (char *) NULL, -1);
}
static
error(string)
char * string;
{
/*
** Match the format of "cc" to allow sh users to
** zic ... 2>&1 | error -t "*" -v
** on BSD systems.
*/
(void) fprintf(stderr, "\"%s\", line %d: %s",
filename, linenum, string);
if (rfilename != NULL)
(void) fprintf(stderr, " (rule from \"%s\", line %d)",
rfilename, rlinenum);
(void) fprintf(stderr, "\n");
++errors;
}
static
usage()
{
(void) fprintf(stderr,
"%s: usage is %s [ -v ] [ -l localtime ] [ -d directory ] [ filename ... ]\n",
progname, progname);
exit(1);
}
static char * lcltime = NULL;
static char * directory = NULL;
main(argc, argv)
int argc;
char * argv[];
{
register int i, j;
register int c;
#ifdef unix
umask(umask(022) | 022);
#endif
progname = argv[0];
while ((c = getopt(argc, argv, "d:l:v")) != EOF)
switch (c) {
default:
usage();
case 'd':
if (directory == NULL)
directory = optarg;
else {
(void) fprintf(stderr,
"%s: More than one -d option specified\n",
progname);
exit(1);
}
break;
case 'l':
if (lcltime == NULL)
lcltime = optarg;
else {
(void) fprintf(stderr,
"%s: More than one -l option specified\n",
progname);
exit(1);
}
break;
case 'v':
noise = TRUE;
break;
}
if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
usage(); /* usage message by request */
if (directory == NULL)
directory = TZDIR;
setboundaries();
zones = (struct zone *) emalloc(0);
rules = (struct rule *) emalloc(0);
links = (struct link *) emalloc(0);
for (i = optind; i < argc; ++i)
infile(argv[i]);
if (errors)
exit(1);
associate();
for (i = 0; i < nzones; i = j) {
/*
* Find the next non-continuation zone entry.
*/
for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
;
outzone(&zones[i], j - i);
}
/*
** We'll take the easy way out on this last part.
*/
if (chdir(directory) != 0) {
(void) fprintf(stderr, "%s: Can't chdir to ", progname);
perror(directory);
exit(1);
}
for (i = 0; i < nlinks; ++i) {
nondunlink(links[i].l_to);
if (link(links[i].l_from, links[i].l_to) != 0) {
(void) fprintf(stderr, "%s: Can't link %s to ",
progname, links[i].l_from);
perror(links[i].l_to);
exit(1);
}
}
if (lcltime != NULL) {
nondunlink(TZDEFAULT);
if (link(lcltime, TZDEFAULT) != 0) {
(void) fprintf(stderr, "%s: Can't link %s to ",
progname, lcltime);
perror(TZDEFAULT);
exit(1);
}
}
exit((errors == 0) ? 0 : 1);
}
static
setboundaries()
{
register time_t bit;
for (bit = 1; bit > 0; bit <<= 1)
;
if (bit == 0) { /* time_t is an unsigned type */
tt_signed = FALSE;
min_time = 0;
max_time = ~(time_t) 0;
} else {
tt_signed = TRUE;
min_time = bit;
max_time = bit;
++max_time;
max_time = -max_time;
}
min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
}
/*
** We get to be careful here since there's a fair chance of root running us.
*/
static
nondunlink(name)
char * name;
{
struct stat s;
if (stat(name, &s) != 0)
return;
if ((s.st_mode & S_IFMT) == S_IFDIR)
return;
(void) unlink(name);
}
/*
** Associate sets of rules with zones.
*/
/*
** Sort by rule name.
*/
static
rcomp(cp1, cp2)
char * cp1;
char * cp2;
{
return strcmp(((struct rule *) cp1)->r_name,
((struct rule *) cp2)->r_name);
}
static
associate()
{
register struct zone * zp;
register struct rule * rp;
register int base, out;
register int i;
if (nrules != 0)
(void) qsort((char *) rules, nrules, sizeof *rules, rcomp);
for (i = 0; i < nzones; ++i) {
zp = &zones[i];
zp->z_rules = NULL;
zp->z_nrules = 0;
}
for (base = 0; base < nrules; base = out) {
rp = &rules[base];
for (out = base + 1; out < nrules; ++out)
if (strcmp(rp->r_name, rules[out].r_name) != 0)
break;
for (i = 0; i < nzones; ++i) {
zp = &zones[i];
if (strcmp(zp->z_rule, rp->r_name) != 0)
continue;
zp->z_rules = rp;
zp->z_nrules = out - base;
}
}
for (i = 0; i < nzones; ++i) {
zp = &zones[i];
if (zp->z_nrules == 0) {
/*
** Maybe we have a local standard time offset.
*/
eat(zp->z_filename, zp->z_linenum);
zp->z_stdoff = gethms(zp->z_rule, "unruly zone", TRUE);
/*
** Note, though, that if there's no rule,
** a '%s' in the format is a bad thing.
*/
if (index(zp->z_format, '%') != 0)
error("%s in ruleless zone");
}
}
if (errors)
exit(1);
}
static
infile(name)
char * name;
{
register FILE * fp;
register char ** fields;
register char * cp;
register struct lookup * lp;
register int nfields;
register int wantcont;
register int num;
char buf[BUFSIZ];
if (strcmp(name, "-") == 0) {
name = "standard input";
fp = stdin;
} else if ((fp = fopen(name, "r")) == NULL) {
(void) fprintf(stderr, "%s: Can't open ", progname);
perror(name);
exit(1);
}
wantcont = FALSE;
for (num = 1; ; ++num) {
eat(name, num);
if (fgets(buf, sizeof buf, fp) != buf)
break;
cp = index(buf, '\n');
if (cp == NULL) {
error("line too long");
exit(1);
}
*cp = '\0';
fields = getfields(buf);
nfields = 0;
while (fields[nfields] != NULL) {
if (ciequal(fields[nfields], "-"))
fields[nfields] = "";
++nfields;
}
if (nfields == 0) {
/* nothing to do */
} else if (wantcont) {
wantcont = inzcont(fields, nfields);
} else {
lp = byword(fields[0], line_codes);
if (lp == NULL)
error("input line of unknown type");
else switch ((int) (lp->l_value)) {
case LC_RULE:
inrule(fields, nfields);
wantcont = FALSE;
break;
case LC_ZONE:
wantcont = inzone(fields, nfields);
break;
case LC_LINK:
inlink(fields, nfields);
wantcont = FALSE;
break;
default: /* "cannot happen" */
(void) fprintf(stderr,
"%s: panic: Invalid l_value %d\n",
progname, lp->l_value);
exit(1);
}
}
free((char *) fields);
}
if (ferror(fp)) {
(void) fprintf(stderr, "%s: Error reading ", progname);
perror(filename);
exit(1);
}
if (fp != stdin && fclose(fp)) {
(void) fprintf(stderr, "%s: Error closing ", progname);
perror(filename);
exit(1);
}
if (wantcont)
error("expected continuation line not found");
}
/*
** Convert a string of one of the forms
** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
** into a number of seconds.
** A null string maps to zero.
** Call error with errstring and return zero on errors.
*/
static long
gethms(string, errstring, signable)
char * string;
char * errstring;
{
int hh, mm, ss, sign;
if (string == NULL || *string == '\0')
return 0;
if (!signable)
sign = 1;
else if (*string == '-') {
sign = -1;
++string;
} else sign = 1;
if (sscanf(string, scheck(string, "%d"), &hh) == 1)
mm = ss = 0;
else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
ss = 0;
else if (sscanf(string, scheck(string, "%d:%d:%d"),
&hh, &mm, &ss) != 3) {
error(errstring);
return 0;
}
if (hh < 0 || hh >= HOURS_PER_DAY ||
mm < 0 || mm >= MINS_PER_HOUR ||
ss < 0 || ss >= SECS_PER_MIN) {
error(errstring);
return 0;
}
return eitol(sign) *
(eitol(hh * MINS_PER_HOUR + mm) *
eitol(SECS_PER_MIN) + eitol(ss));
}
static
inrule(fields, nfields)
register char ** fields;
{
static struct rule r;
if (nfields != RULE_FIELDS) {
error("wrong number of fields on Rule line");
return;
}
if (*fields[RF_NAME] == '\0') {
error("nameless rule");
return;
}
r.r_filename = filename;
r.r_linenum = linenum;
r.r_stdoff = gethms(fields[RF_STDOFF], "invalid saved time", TRUE);
rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
r.r_name = ecpyalloc(fields[RF_NAME]);
r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
rules = (struct rule *) erealloc((char *) rules,
(nrules + 1) * sizeof *rules);
rules[nrules++] = r;
}
static
inzone(fields, nfields)
register char ** fields;
{
register int i;
char buf[132];
if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
error("wrong number of fields on Zone line");
return FALSE;
}
if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
(void) sprintf(buf,
"\"Zone %s\" line and -l option are mutually exclusive",
TZDEFAULT);
error(buf);
return FALSE;
}
for (i = 0; i < nzones; ++i)
if (zones[i].z_name != NULL &&
strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
(void) sprintf(buf,
"duplicate zone name %s (file \"%s\", line %d)",
fields[ZF_NAME],
zones[i].z_filename,
zones[i].z_linenum);
error(buf);
return FALSE;
}
return inzsub(fields, nfields, FALSE);
}
static
inzcont(fields, nfields)
register char ** fields;
{
if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
error("wrong number of fields on Zone continuation line");
return FALSE;
}
return inzsub(fields, nfields, TRUE);
}
static
inzsub(fields, nfields, iscont)
register char ** fields;
{
register char * cp;
static struct zone z;
register int i_gmtoff, i_rule, i_format;
register int i_untilyear, i_untilmonth;
register int i_untilday, i_untiltime;
register int hasuntil;
if (iscont) {
i_gmtoff = ZFC_GMTOFF;
i_rule = ZFC_RULE;
i_format = ZFC_FORMAT;
i_untilyear = ZFC_UNTILYEAR;
i_untilmonth = ZFC_UNTILMONTH;
i_untilday = ZFC_UNTILDAY;
i_untiltime = ZFC_UNTILTIME;
z.z_name = NULL;
} else {
i_gmtoff = ZF_GMTOFF;
i_rule = ZF_RULE;
i_format = ZF_FORMAT;
i_untilyear = ZF_UNTILYEAR;
i_untilmonth = ZF_UNTILMONTH;
i_untilday = ZF_UNTILDAY;
i_untiltime = ZF_UNTILTIME;
z.z_name = ecpyalloc(fields[ZF_NAME]);
}
z.z_filename = filename;
z.z_linenum = linenum;
z.z_gmtoff = gethms(fields[i_gmtoff], "invalid GMT offset", TRUE);
if ((cp = index(fields[i_format], '%')) != 0) {
if (*++cp != 's' || index(cp, '%') != 0) {
error("invalid abbreviation format");
return FALSE;
}
}
z.z_rule = ecpyalloc(fields[i_rule]);
z.z_format = ecpyalloc(fields[i_format]);
hasuntil = nfields > i_untilyear;
if (hasuntil) {
z.z_untilrule.r_filename = filename;
z.z_untilrule.r_linenum = linenum;
rulesub(&z.z_untilrule,
fields[i_untilyear],
"only",
"",
(nfields > i_untilmonth) ? fields[i_untilmonth] : "Jan",
(nfields > i_untilday) ? fields[i_untilday] : "1",
(nfields > i_untiltime) ? fields[i_untiltime] : "0");
z.z_untiltime = rpytime(&z.z_untilrule, z.z_untilrule.r_loyear);
if (iscont && nzones > 0 && z.z_untiltime < max_time &&
z.z_untiltime > min_time &&
zones[nzones - 1].z_untiltime >= z.z_untiltime) {
error("Zone continuation line end time is not after end time of previous line");
return FALSE;
}
}
zones = (struct zone *) erealloc((char *) zones,
(nzones + 1) * sizeof *zones);
zones[nzones++] = z;
/*
** If there was an UNTIL field on this line,
** there's more information about the zone on the next line.
*/
return hasuntil;
}
static
inlink(fields, nfields)
register char ** fields;
{
struct link l;
if (nfields != LINK_FIELDS) {
error("wrong number of fields on Link line");
return;
}
if (*fields[LF_FROM] == '\0') {
error("blank FROM field on Link line");
return;
}
if (*fields[LF_TO] == '\0') {
error("blank TO field on Link line");
return;
}
l.l_filename = filename;
l.l_linenum = linenum;
l.l_from = ecpyalloc(fields[LF_FROM]);
l.l_to = ecpyalloc(fields[LF_TO]);
links = (struct link *) erealloc((char *) links,
(nlinks + 1) * sizeof *links);
links[nlinks++] = l;
}
static
rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
register struct rule * rp;
char * loyearp;
char * hiyearp;
char * typep;
char * monthp;
char * dayp;
char * timep;
{
register struct lookup * lp;
register char * cp;
if ((lp = byword(monthp, mon_names)) == NULL) {
error("invalid month name");
return;
}
rp->r_month = lp->l_value;
rp->r_todisstd = FALSE;
cp = timep;
if (*cp != '\0') {
cp += strlen(cp) - 1;
switch (lowerit(*cp)) {
case 's':
rp->r_todisstd = TRUE;
*cp = '\0';
break;
case 'w':
rp->r_todisstd = FALSE;
*cp = '\0';
break;
}
}
rp->r_tod = gethms(timep, "invalid time of day", FALSE);
/*
** Year work.
*/
cp = loyearp;
if ((lp = byword(cp, begin_years)) != NULL) switch ((int) lp->l_value) {
case YR_MINIMUM:
rp->r_loyear = min_year;
break;
case YR_MAXIMUM:
rp->r_loyear = max_year;
break;
default: /* "cannot happen" */
(void) fprintf(stderr,
"%s: panic: Invalid l_value %d\n",
progname, lp->l_value);
exit(1);
} else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1 ||
rp->r_loyear < min_year || rp->r_loyear > max_year) {
if (noise)
error("invalid starting year");
if (rp->r_loyear > max_year)
return;
}
cp = hiyearp;
if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
case YR_MINIMUM:
rp->r_hiyear = min_year;
break;
case YR_MAXIMUM:
rp->r_hiyear = max_year;
break;
case YR_ONLY:
rp->r_hiyear = rp->r_loyear;
break;
default: /* "cannot happen" */
(void) fprintf(stderr,
"%s: panic: Invalid l_value %d\n",
progname, lp->l_value);
exit(1);
} else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1 ||
rp->r_hiyear < min_year || rp->r_hiyear > max_year) {
if (noise)
error("invalid ending year");
if (rp->r_hiyear < min_year)
return;
}
if (rp->r_hiyear < min_year)
return;
if (rp->r_loyear < min_year)
rp->r_loyear = min_year;
if (rp->r_hiyear > max_year)
rp->r_hiyear = max_year;
if (rp->r_loyear > rp->r_hiyear) {
error("starting year greater than ending year");
return;
}
if (*typep == '\0')
rp->r_yrtype = NULL;
else {
if (rp->r_loyear == rp->r_hiyear) {
error("typed single year");
return;
}
rp->r_yrtype = ecpyalloc(typep);
}
/*
** Day work.
** Accept things such as:
** 1
** last-Sunday
** Sun<=20
** Sun>=7
*/
if ((lp = byword(dayp, lasts)) != NULL) {
rp->r_dycode = DC_DOWLEQ;
rp->r_wday = lp->l_value;
rp->r_dayofmonth = len_months[1][rp->r_month];
} else {
if ((cp = index(dayp, '<')) != 0)
rp->r_dycode = DC_DOWLEQ;
else if ((cp = index(dayp, '>')) != 0)
rp->r_dycode = DC_DOWGEQ;
else {
cp = dayp;
rp->r_dycode = DC_DOM;
}
if (rp->r_dycode != DC_DOM) {
*cp++ = 0;
if (*cp++ != '=') {
error("invalid day of month");
return;
}
if ((lp = byword(dayp, wday_names)) == NULL) {
error("invalid weekday name");
return;
}
rp->r_wday = lp->l_value;
}
if (sscanf(cp, scheck(cp, "%d"), &rp->r_dayofmonth) != 1 ||
rp->r_dayofmonth <= 0 ||
(rp->r_dayofmonth > len_months[1][rp->r_month])) {
error("invalid day of month");
return;
}
}
}
static
puttzcode(val, fp)
long val;
FILE * fp;
{
register int c;
register int shift;
for (shift = 24; shift >= 0; shift -= 8) {
c = val >> shift;
(void) putc(c, fp);
}
}
static
writezone(name)
char * name;
{
register FILE * fp;
register int i;
char fullname[BUFSIZ];
if (strlen(directory) + 1 + strlen(name) >= sizeof fullname) {
(void) fprintf(stderr,
"%s: File name %s/%s too long\n", progname,
directory, name);
exit(1);
}
(void) sprintf(fullname, "%s/%s", directory, name);
if ((fp = fopen(fullname, "w")) == NULL) {
if (mkdirs(fullname) != 0)
exit(1);
if ((fp = fopen(fullname, "w")) == NULL) {
(void) fprintf(stderr, "%s: Can't create ", progname);
perror(fullname);
exit(1);
}
}
(void) fseek(fp, (long) sizeof ((struct tzhead *) 0)->tzh_reserved, 0);
puttzcode(eitol(timecnt), fp);
puttzcode(eitol(typecnt), fp);
puttzcode(eitol(charcnt), fp);
for (i = 0; i < timecnt; ++i)
puttzcode((long) ats[i], fp);
if (timecnt > 0)
(void) fwrite((char *) types, sizeof types[0],
(int) timecnt, fp);
for (i = 0; i < typecnt; ++i) {
puttzcode((long) gmtoffs[i], fp);
(void) putc(isdsts[i], fp);
(void) putc(abbrinds[i], fp);
}
if (charcnt != 0)
(void) fwrite(chars, sizeof chars[0], (int) charcnt, fp);
if (ferror(fp) || fclose(fp)) {
(void) fprintf(stderr, "%s: Write error on ", progname);
perror(fullname);
exit(1);
}
}
static
outzone(zpfirst, zonecount)
struct zone * zpfirst;
{
register struct zone * zp;
register struct rule * rp;
register int i, j;
register int usestart, useuntil;
register time_t starttime, untiltime;
register long gmtoff;
register long stdoff;
register int year;
register long startoff;
register int startisdst;
register int type;
char startbuf[BUFSIZ];
/*
** Now. . .finally. . .generate some useful data!
*/
timecnt = 0;
typecnt = 0;
charcnt = 0;
/*
** Two guesses. . .the second may well be corrected later.
*/
gmtoff = zpfirst->z_gmtoff;
stdoff = 0;
for (i = 0; i < zonecount; ++i) {
usestart = i > 0;
useuntil = i < (zonecount - 1);
zp = &zpfirst[i];
eat(zp->z_filename, zp->z_linenum);
startisdst = -1;
if (zp->z_nrules == 0) {
type = addtype(oadd(zp->z_gmtoff, zp->z_stdoff),
zp->z_format, zp->z_stdoff != 0);
if (usestart)
addtt(starttime, type);
gmtoff = zp->z_gmtoff;
stdoff = zp->z_stdoff;
} else for (year = min_year; year <= max_year; ++year) {
if (useuntil && year > zp->z_untilrule.r_hiyear)
break;
/*
** Mark which rules to do in the current year.
** For those to do, calculate rpytime(rp, year);
*/
for (j = 0; j < zp->z_nrules; ++j) {
rp = &zp->z_rules[j];
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
rp->r_todo = year >= rp->r_loyear &&
year <= rp->r_hiyear &&
yearistype(year, rp->r_yrtype);
if (rp->r_todo)
rp->r_temp = rpytime(rp, year);
}
for ( ; ; ) {
register int k;
register time_t jtime, ktime;
register long offset;
char buf[BUFSIZ];
if (useuntil) {
/*
** Turn untiltime into GMT
** assuming the current gmtoff and
** stdoff values.
*/
offset = gmtoff;
if (!zp->z_untilrule.r_todisstd)
offset = oadd(offset, stdoff);
untiltime = tadd(zp->z_untiltime,
-offset);
}
/*
** Find the rule (of those to do, if any)
** that takes effect earliest in the year.
*/
k = -1;
for (j = 0; j < zp->z_nrules; ++j) {
rp = &zp->z_rules[j];
if (!rp->r_todo)
continue;
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
offset = gmtoff;
if (!rp->r_todisstd)
offset = oadd(offset, stdoff);
jtime = rp->r_temp;
if (jtime == min_time ||
jtime == max_time)
continue;
jtime = tadd(jtime, -offset);
if (k < 0 || jtime < ktime) {
k = j;
ktime = jtime;
}
}
if (k < 0)
break; /* go on to next year */
rp = &zp->z_rules[k];
rp->r_todo = FALSE;
if (useuntil && ktime >= untiltime)
break;
if (usestart) {
if (ktime < starttime) {
stdoff = rp->r_stdoff;
startoff = oadd(zp->z_gmtoff,
rp->r_stdoff);
(void) sprintf(startbuf,
zp->z_format,
rp->r_abbrvar);
startisdst =
rp->r_stdoff != 0;
continue;
}
if (ktime != starttime &&
startisdst >= 0)
addtt(starttime, addtype(startoff, startbuf, startisdst));
usestart = FALSE;
}
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
(void) sprintf(buf, zp->z_format,
rp->r_abbrvar);
offset = oadd(zp->z_gmtoff, rp->r_stdoff);
type = addtype(offset, buf, rp->r_stdoff != 0);
if (timecnt != 0 || rp->r_stdoff != 0)
addtt(ktime, type);
gmtoff = zp->z_gmtoff;
stdoff = rp->r_stdoff;
}
}
/*
** Now we may get to set starttime for the next zone line.
*/
if (useuntil)
starttime = tadd(zp->z_untiltime,
-gmtoffs[types[timecnt - 1]]);
}
writezone(zpfirst->z_name);
}
static
addtt(starttime, type)
time_t starttime;
{
if (timecnt != 0 && type == types[timecnt - 1])
return; /* easy enough! */
if (timecnt >= TZ_MAX_TIMES) {
error("too many transitions?!");
exit(1);
}
ats[timecnt] = starttime;
types[timecnt] = type;
++timecnt;
}
static
addtype(gmtoff, abbr, isdst)
long gmtoff;
char * abbr;
{
register int i, j;
/*
** See if there's already an entry for this zone type.
** If so, just return its index.
*/
for (i = 0; i < typecnt; ++i) {
if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
strcmp(abbr, &chars[abbrinds[i]]) == 0)
return i;
}
/*
** There isn't one; add a new one, unless there are already too
** many.
*/
if (typecnt >= TZ_MAX_TYPES) {
error("too many local time types");
exit(1);
}
gmtoffs[i] = gmtoff;
isdsts[i] = isdst;
for (j = 0; j < charcnt; ++j)
if (strcmp(&chars[j], abbr) == 0)
break;
if (j == charcnt)
newabbr(abbr);
abbrinds[i] = j;
++typecnt;
return i;
}
static
yearistype(year, type)
char * type;
{
char buf[BUFSIZ];
int result;
if (type == NULL || *type == '\0')
return TRUE;
if (strcmp(type, "uspres") == 0)
return (year % 4) == 0;
if (strcmp(type, "nonpres") == 0)
return (year % 4) != 0;
(void) sprintf(buf, "yearistype %d %s", year, type);
result = system(buf);
if (result == 0)
return TRUE;
if (result == 1 << 8)
return FALSE;
error("Wild result from command execution");
(void) fprintf(stderr, "%s: command was '%s', result was %d\n",
progname, buf, result);
for ( ; ; )
exit(1);
}
static
lowerit(a)
{
return (isascii(a) && isupper(a)) ? tolower(a) : a;
}
static
ciequal(ap, bp) /* case-insensitive equality */
register char * ap;
register char * bp;
{
while (lowerit(*ap) == lowerit(*bp++))
if (*ap++ == '\0')
return TRUE;
return FALSE;
}
static
isabbr(abbr, word)
register char * abbr;
register char * word;
{
if (lowerit(*abbr) != lowerit(*word))
return FALSE;
++word;
while (*++abbr != '\0')
do if (*word == '\0')
return FALSE;
while (lowerit(*word++) != lowerit(*abbr));
return TRUE;
}
static struct lookup *
byword(word, table)
register char * word;
register struct lookup * table;
{
register struct lookup * foundlp;
register struct lookup * lp;
if (word == NULL || table == NULL)
return NULL;
/*
** Look for exact match.
*/
for (lp = table; lp->l_word != NULL; ++lp)
if (ciequal(word, lp->l_word))
return lp;
/*
** Look for inexact match.
*/
foundlp = NULL;
for (lp = table; lp->l_word != NULL; ++lp)
if (isabbr(word, lp->l_word))
if (foundlp == NULL)
foundlp = lp;
else return NULL; /* multiple inexact matches */
return foundlp;
}
static char **
getfields(cp)
register char * cp;
{
register char * dp;
register char ** array;
register int nsubs;
if (cp == NULL)
return NULL;
array = (char **) emalloc((strlen(cp) + 1) * sizeof *array);
nsubs = 0;
for ( ; ; ) {
while (isascii(*cp) && isspace(*cp))
++cp;
if (*cp == '\0' || *cp == '#')
break;
array[nsubs++] = dp = cp;
do {
if ((*dp = *cp++) != '"')
++dp;
else while ((*dp = *cp++) != '"')
if (*dp != '\0')
++dp;
else error("Odd number of quotation marks");
} while (*cp != '\0' && *cp != '#' &&
(!isascii(*cp) || !isspace(*cp)));
if (isascii(*cp) && isspace(*cp))
++cp;
*dp = '\0';
}
array[nsubs] = NULL;
return array;
}
static long
oadd(t1, t2)
long t1;
long t2;
{
register long t;
t = t1 + t2;
if (t2 > 0 && t <= t1 || t2 < 0 && t >= t1) {
error("time overflow");
exit(1);
}
return t;
}
static time_t
tadd(t1, t2)
time_t t1;
long t2;
{
register time_t t;
if (t1 == max_time && t2 > 0)
return max_time;
if (t1 == min_time && t2 < 0)
return min_time;
t = t1 + t2;
if (t2 > 0 && t <= t1 || t2 < 0 && t >= t1) {
error("time overflow");
exit(1);
}
return t;
}
/*
** Given a rule, and a year, compute the date - in seconds since January 1,
** 1970, 00:00 LOCAL time - in that year that the rule refers to.
*/
static time_t
rpytime(rp, wantedy)
register struct rule * rp;
register int wantedy;
{
register int y, m, i;
register long dayoff; /* with a nod to Margaret O. */
register time_t t;
dayoff = 0;
m = TM_JANUARY;
y = EPOCH_YEAR;
while (wantedy != y) {
if (wantedy > y) {
i = len_years[isleap(y)];
++y;
} else {
--y;
i = -len_years[isleap(y)];
}
dayoff = oadd(dayoff, eitol(i));
}
while (m != rp->r_month) {
i = len_months[isleap(y)][m];
dayoff = oadd(dayoff, eitol(i));
++m;
}
i = rp->r_dayofmonth;
if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
if (rp->r_dycode == DC_DOWLEQ)
--i;
else {
error("use of 2/29 in non leap-year");
exit(1);
}
}
--i;
dayoff = oadd(dayoff, eitol(i));
if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
register long wday;
#define LDAYS_PER_WEEK ((long) DAYS_PER_WEEK)
wday = eitol(EPOCH_WDAY);
/*
** Don't trust mod of negative numbers.
*/
if (dayoff >= 0)
wday = (wday + dayoff) % LDAYS_PER_WEEK;
else {
wday -= ((-dayoff) % LDAYS_PER_WEEK);
if (wday < 0)
wday += LDAYS_PER_WEEK;
}
while (wday != eitol(rp->r_wday))
if (rp->r_dycode == DC_DOWGEQ) {
dayoff = oadd(dayoff, (long) 1);
if (++wday >= LDAYS_PER_WEEK)
wday = 0;
++i;
} else {
dayoff = oadd(dayoff, (long) -1);
if (--wday < 0)
wday = LDAYS_PER_WEEK;
--i;
}
if (i < 0 || i >= len_months[isleap(y)][m]) {
error("no day in month matches rule");
exit(1);
}
}
if (dayoff < 0 && !tt_signed) {
if (wantedy == rp->r_loyear)
return min_time;
error("time before zero");
exit(1);
}
t = (time_t) dayoff * SECS_PER_DAY;
/*
** Cheap overflow check.
*/
if (t / SECS_PER_DAY != dayoff) {
if (wantedy == rp->r_hiyear)
return max_time;
if (wantedy == rp->r_loyear)
return min_time;
error("time overflow");
exit(1);
}
return tadd(t, rp->r_tod);
}
static
newabbr(string)
char * string;
{
register int i;
i = strlen(string) + 1;
if (charcnt + i >= TZ_MAX_CHARS) {
error("too many, or too long, time zone abbreviations");
exit(1);
}
(void) strcpy(&chars[charcnt], string);
charcnt += eitol(i);
}
static
mkdirs(name)
char * name;
{
register char * cp;
if ((cp = name) == NULL || *cp == '\0')
return 0;
while ((cp = index(cp + 1,'/')) != 0) {
*cp = '\0';
if (access(name,F_OK) && mkdir(name,0755)) {
perror(name);
return -1;
}
*cp = '/';
}
return 0;
}
static long
eitol(i)
{
long l;
l = i;
if (i < 0 && l >= 0 || i == 0 && l != 0 || i > 0 && l <= 0) {
(void) fprintf(stderr, "%s: %d did not sign extend correctly\n",
progname, i);
exit(1);
}
return l;
}
/*
** UNIX is a registered trademark of AT&T.
*/