1#ifndef lint 2#ifndef NOID
| 1#ifndef lint 2#ifndef NOID
|
3static char elsieid[] = "@(#)localtime.c 7.19";
| 3static char elsieid[] = "@(#)localtime.c 7.44";
|
4#endif /* !defined NOID */ 5#endif /* !defined lint */ 6 7/* 8** Leap second handling from Bradley White (bww@k.gp.cs.cmu.edu). 9** POSIX-style TZ environment variable handling from Guy Harris 10** (guy@auspex.com). 11*/ 12 13/*LINTLIBRARY*/ 14 15#include "private.h" 16#include "tzfile.h" 17#include "fcntl.h" 18
| 4#endif /* !defined NOID */ 5#endif /* !defined lint */ 6 7/* 8** Leap second handling from Bradley White (bww@k.gp.cs.cmu.edu). 9** POSIX-style TZ environment variable handling from Guy Harris 10** (guy@auspex.com). 11*/ 12 13/*LINTLIBRARY*/ 14 15#include "private.h" 16#include "tzfile.h" 17#include "fcntl.h" 18
|
19#define ACCESS_MODE O_RDONLY
| 19/* 20** SunOS 4.1.1 headers lack O_BINARY. 21*/
|
20 21#ifdef O_BINARY 22#define OPEN_MODE (O_RDONLY | O_BINARY) 23#endif /* defined O_BINARY */ 24#ifndef O_BINARY 25#define OPEN_MODE O_RDONLY 26#endif /* !defined O_BINARY */ 27 28#ifndef WILDABBR 29/* 30** Someone might make incorrect use of a time zone abbreviation: 31** 1. They might reference tzname[0] before calling tzset (explicitly
| 22 23#ifdef O_BINARY 24#define OPEN_MODE (O_RDONLY | O_BINARY) 25#endif /* defined O_BINARY */ 26#ifndef O_BINARY 27#define OPEN_MODE O_RDONLY 28#endif /* !defined O_BINARY */ 29 30#ifndef WILDABBR 31/* 32** Someone might make incorrect use of a time zone abbreviation: 33** 1. They might reference tzname[0] before calling tzset (explicitly
|
32** or implicitly).
| 34** or implicitly).
|
33** 2. They might reference tzname[1] before calling tzset (explicitly
| 35** 2. They might reference tzname[1] before calling tzset (explicitly
|
34** or implicitly).
| 36** or implicitly).
|
35** 3. They might reference tzname[1] after setting to a time zone 36** in which Daylight Saving Time is never observed. 37** 4. They might reference tzname[0] after setting to a time zone 38** in which Standard Time is never observed. 39** 5. They might reference tm.TM_ZONE after calling offtime. 40** What's best to do in the above cases is open to debate; 41** for now, we just set things up so that in any of the five cases 42** WILDABBR is used. Another possibility: initialize tzname[0] to the 43** string "tzname[0] used before set", and similarly for the other cases. 44** And another: initialize tzname[0] to "ERA", with an explanation in the 45** manual page of what this "time zone abbreviation" means (doing this so 46** that tzname[0] has the "normal" length of three characters). 47*/ 48#define WILDABBR " " 49#endif /* !defined WILDABBR */ 50
| 37** 3. They might reference tzname[1] after setting to a time zone 38** in which Daylight Saving Time is never observed. 39** 4. They might reference tzname[0] after setting to a time zone 40** in which Standard Time is never observed. 41** 5. They might reference tm.TM_ZONE after calling offtime. 42** What's best to do in the above cases is open to debate; 43** for now, we just set things up so that in any of the five cases 44** WILDABBR is used. Another possibility: initialize tzname[0] to the 45** string "tzname[0] used before set", and similarly for the other cases. 46** And another: initialize tzname[0] to "ERA", with an explanation in the 47** manual page of what this "time zone abbreviation" means (doing this so 48** that tzname[0] has the "normal" length of three characters). 49*/ 50#define WILDABBR " " 51#endif /* !defined WILDABBR */ 52
|
51static const char GMT[] = "GMT";
| 53static char wildabbr[] = "WILDABBR";
|
52
| 54
|
| 55static const char gmt[] = "GMT"; 56
|
53struct ttinfo { /* time type information */ 54 long tt_gmtoff; /* GMT offset in seconds */ 55 int tt_isdst; /* used to set tm_isdst */ 56 int tt_abbrind; /* abbreviation list index */ 57 int tt_ttisstd; /* TRUE if transition is std time */
| 57struct ttinfo { /* time type information */ 58 long tt_gmtoff; /* GMT offset in seconds */ 59 int tt_isdst; /* used to set tm_isdst */ 60 int tt_abbrind; /* abbreviation list index */ 61 int tt_ttisstd; /* TRUE if transition is std time */
|
| 62 int tt_ttisgmt; /* TRUE if transition is GMT */
|
58}; 59 60struct lsinfo { /* leap second information */ 61 time_t ls_trans; /* transition time */ 62 long ls_corr; /* correction to apply */ 63}; 64 65#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b)) 66 67#ifdef TZNAME_MAX 68#define MY_TZNAME_MAX TZNAME_MAX 69#endif /* defined TZNAME_MAX */ 70#ifndef TZNAME_MAX 71#define MY_TZNAME_MAX 255 72#endif /* !defined TZNAME_MAX */ 73 74struct state { 75 int leapcnt; 76 int timecnt; 77 int typecnt; 78 int charcnt; 79 time_t ats[TZ_MAX_TIMES]; 80 unsigned char types[TZ_MAX_TIMES]; 81 struct ttinfo ttis[TZ_MAX_TYPES];
| 63}; 64 65struct lsinfo { /* leap second information */ 66 time_t ls_trans; /* transition time */ 67 long ls_corr; /* correction to apply */ 68}; 69 70#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b)) 71 72#ifdef TZNAME_MAX 73#define MY_TZNAME_MAX TZNAME_MAX 74#endif /* defined TZNAME_MAX */ 75#ifndef TZNAME_MAX 76#define MY_TZNAME_MAX 255 77#endif /* !defined TZNAME_MAX */ 78 79struct state { 80 int leapcnt; 81 int timecnt; 82 int typecnt; 83 int charcnt; 84 time_t ats[TZ_MAX_TIMES]; 85 unsigned char types[TZ_MAX_TIMES]; 86 struct ttinfo ttis[TZ_MAX_TYPES];
|
82 char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof GMT),
| 87 char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof gmt),
|
83 (2 * (MY_TZNAME_MAX + 1)))]; 84 struct lsinfo lsis[TZ_MAX_LEAPS]; 85}; 86 87struct rule { 88 int r_type; /* type of rule--see below */ 89 int r_day; /* day number of rule */ 90 int r_week; /* week number of rule */ 91 int r_mon; /* month number of rule */ 92 long r_time; /* transition time of rule */ 93}; 94 95#define JULIAN_DAY 0 /* Jn - Julian day */ 96#define DAY_OF_YEAR 1 /* n - day of year */ 97#define MONTH_NTH_DAY_OF_WEEK 2 /* Mm.n.d - month, week, day of week */ 98 99/* 100** Prototypes for static functions. 101*/ 102 103static long detzcode P((const char * codep)); 104static const char * getzname P((const char * strp)); 105static const char * getnum P((const char * strp, int * nump, int min, 106 int max)); 107static const char * getsecs P((const char * strp, long * secsp)); 108static const char * getoffset P((const char * strp, long * offsetp)); 109static const char * getrule P((const char * strp, struct rule * rulep)); 110static void gmtload P((struct state * sp)); 111static void gmtsub P((const time_t * timep, long offset, 112 struct tm * tmp)); 113static void localsub P((const time_t * timep, long offset, 114 struct tm * tmp)); 115static int increment_overflow P((int * number, int delta)); 116static int normalize_overflow P((int * tensptr, int * unitsptr, 117 int base)); 118static void settzname P((void));
| 88 (2 * (MY_TZNAME_MAX + 1)))]; 89 struct lsinfo lsis[TZ_MAX_LEAPS]; 90}; 91 92struct rule { 93 int r_type; /* type of rule--see below */ 94 int r_day; /* day number of rule */ 95 int r_week; /* week number of rule */ 96 int r_mon; /* month number of rule */ 97 long r_time; /* transition time of rule */ 98}; 99 100#define JULIAN_DAY 0 /* Jn - Julian day */ 101#define DAY_OF_YEAR 1 /* n - day of year */ 102#define MONTH_NTH_DAY_OF_WEEK 2 /* Mm.n.d - month, week, day of week */ 103 104/* 105** Prototypes for static functions. 106*/ 107 108static long detzcode P((const char * codep)); 109static const char * getzname P((const char * strp)); 110static const char * getnum P((const char * strp, int * nump, int min, 111 int max)); 112static const char * getsecs P((const char * strp, long * secsp)); 113static const char * getoffset P((const char * strp, long * offsetp)); 114static const char * getrule P((const char * strp, struct rule * rulep)); 115static void gmtload P((struct state * sp)); 116static void gmtsub P((const time_t * timep, long offset, 117 struct tm * tmp)); 118static void localsub P((const time_t * timep, long offset, 119 struct tm * tmp)); 120static int increment_overflow P((int * number, int delta)); 121static int normalize_overflow P((int * tensptr, int * unitsptr, 122 int base)); 123static void settzname P((void));
|
119static time_t time1 P((struct tm * tmp, void (* funcp)(),
| 124static time_t time1 P((struct tm * tmp, 125 void(*funcp) P((const time_t *, 126 long, struct tm *)),
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120 long offset));
| 127 long offset));
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121static time_t time2 P((struct tm *tmp, void (* funcp)(),
| 128static time_t time2 P((struct tm *tmp, 129 void(*funcp) P((const time_t *, 130 long, struct tm*)),
|
122 long offset, int * okayp)); 123static void timesub P((const time_t * timep, long offset, 124 const struct state * sp, struct tm * tmp)); 125static int tmcomp P((const struct tm * atmp, 126 const struct tm * btmp)); 127static time_t transtime P((time_t janfirst, int year, 128 const struct rule * rulep, long offset)); 129static int tzload P((const char * name, struct state * sp)); 130static int tzparse P((const char * name, struct state * sp, 131 int lastditch)); 132 133#ifdef ALL_STATE 134static struct state * lclptr; 135static struct state * gmtptr; 136#endif /* defined ALL_STATE */ 137 138#ifndef ALL_STATE 139static struct state lclmem; 140static struct state gmtmem; 141#define lclptr (&lclmem) 142#define gmtptr (&gmtmem) 143#endif /* State Farm */ 144
| 131 long offset, int * okayp)); 132static void timesub P((const time_t * timep, long offset, 133 const struct state * sp, struct tm * tmp)); 134static int tmcomp P((const struct tm * atmp, 135 const struct tm * btmp)); 136static time_t transtime P((time_t janfirst, int year, 137 const struct rule * rulep, long offset)); 138static int tzload P((const char * name, struct state * sp)); 139static int tzparse P((const char * name, struct state * sp, 140 int lastditch)); 141 142#ifdef ALL_STATE 143static struct state * lclptr; 144static struct state * gmtptr; 145#endif /* defined ALL_STATE */ 146 147#ifndef ALL_STATE 148static struct state lclmem; 149static struct state gmtmem; 150#define lclptr (&lclmem) 151#define gmtptr (&gmtmem) 152#endif /* State Farm */ 153
|
| 154#ifndef TZ_STRLEN_MAX 155#define TZ_STRLEN_MAX 255 156#endif /* !defined TZ_STRLEN_MAX */ 157 158static char lcl_TZname[TZ_STRLEN_MAX + 1];
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145static int lcl_is_set; 146static int gmt_is_set; 147 148char * tzname[2] = {
| 159static int lcl_is_set; 160static int gmt_is_set; 161 162char * tzname[2] = {
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149 WILDABBR, 150 WILDABBR
| 163 wildabbr, 164 wildabbr
|
151}; 152
| 165}; 166
|
| 167/* 168** Section 4.12.3 of X3.159-1989 requires that 169** Except for the strftime function, these functions [asctime, 170** ctime, gmtime, localtime] return values in one of two static 171** objects: a broken-down time structure and an array of char. 172** Thanks to Paul Eggert (eggert@twinsun.com) for noting this. 173*/ 174 175static struct tm tm; 176
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153#ifdef USG_COMPAT 154time_t timezone = 0; 155int daylight = 0; 156#endif /* defined USG_COMPAT */ 157 158#ifdef ALTZONE 159time_t altzone = 0; 160#endif /* defined ALTZONE */ 161 162static long 163detzcode(codep) 164const char * const codep; 165{ 166 register long result; 167 register int i; 168
| 177#ifdef USG_COMPAT 178time_t timezone = 0; 179int daylight = 0; 180#endif /* defined USG_COMPAT */ 181 182#ifdef ALTZONE 183time_t altzone = 0; 184#endif /* defined ALTZONE */ 185 186static long 187detzcode(codep) 188const char * const codep; 189{ 190 register long result; 191 register int i; 192
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169 result = 0;
| 193 result = (codep[0] & 0x80) ? ~0L : 0L;
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170 for (i = 0; i < 4; ++i) 171 result = (result << 8) | (codep[i] & 0xff); 172 return result; 173} 174 175static void
| 194 for (i = 0; i < 4; ++i) 195 result = (result << 8) | (codep[i] & 0xff); 196 return result; 197} 198 199static void
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176settzname()
| 200settzname P((void))
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177{
| 201{
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178 register const struct state * const sp = lclptr;
| 202 register struct state * const sp = lclptr;
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179 register int i; 180
| 203 register int i; 204
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181 tzname[0] = WILDABBR; 182 tzname[1] = WILDABBR;
| 205 tzname[0] = wildabbr; 206 tzname[1] = wildabbr;
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183#ifdef USG_COMPAT 184 daylight = 0; 185 timezone = 0; 186#endif /* defined USG_COMPAT */ 187#ifdef ALTZONE 188 altzone = 0; 189#endif /* defined ALTZONE */ 190#ifdef ALL_STATE 191 if (sp == NULL) {
| 207#ifdef USG_COMPAT 208 daylight = 0; 209 timezone = 0; 210#endif /* defined USG_COMPAT */ 211#ifdef ALTZONE 212 altzone = 0; 213#endif /* defined ALTZONE */ 214#ifdef ALL_STATE 215 if (sp == NULL) {
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192 tzname[0] = tzname[1] = GMT;
| 216 tzname[0] = tzname[1] = gmt;
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193 return; 194 } 195#endif /* defined ALL_STATE */ 196 for (i = 0; i < sp->typecnt; ++i) { 197 register const struct ttinfo * const ttisp = &sp->ttis[i]; 198 199 tzname[ttisp->tt_isdst] =
| 217 return; 218 } 219#endif /* defined ALL_STATE */ 220 for (i = 0; i < sp->typecnt; ++i) { 221 register const struct ttinfo * const ttisp = &sp->ttis[i]; 222 223 tzname[ttisp->tt_isdst] =
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200 (char *) &sp->chars[ttisp->tt_abbrind];
| 224 &sp->chars[ttisp->tt_abbrind];
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201#ifdef USG_COMPAT 202 if (ttisp->tt_isdst) 203 daylight = 1; 204 if (i == 0 || !ttisp->tt_isdst) 205 timezone = -(ttisp->tt_gmtoff); 206#endif /* defined USG_COMPAT */ 207#ifdef ALTZONE 208 if (i == 0 || ttisp->tt_isdst) 209 altzone = -(ttisp->tt_gmtoff); 210#endif /* defined ALTZONE */ 211 } 212 /* 213 ** And to get the latest zone names into tzname. . . 214 */ 215 for (i = 0; i < sp->timecnt; ++i) { 216 register const struct ttinfo * const ttisp = 217 &sp->ttis[ 218 sp->types[i]]; 219 220 tzname[ttisp->tt_isdst] =
| 225#ifdef USG_COMPAT 226 if (ttisp->tt_isdst) 227 daylight = 1; 228 if (i == 0 || !ttisp->tt_isdst) 229 timezone = -(ttisp->tt_gmtoff); 230#endif /* defined USG_COMPAT */ 231#ifdef ALTZONE 232 if (i == 0 || ttisp->tt_isdst) 233 altzone = -(ttisp->tt_gmtoff); 234#endif /* defined ALTZONE */ 235 } 236 /* 237 ** And to get the latest zone names into tzname. . . 238 */ 239 for (i = 0; i < sp->timecnt; ++i) { 240 register const struct ttinfo * const ttisp = 241 &sp->ttis[ 242 sp->types[i]]; 243 244 tzname[ttisp->tt_isdst] =
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221 (char *) &sp->chars[ttisp->tt_abbrind];
| 245 &sp->chars[ttisp->tt_abbrind];
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222 } 223} 224 225static int 226tzload(name, sp) 227register const char * name; 228register struct state * const sp; 229{ 230 register const char * p; 231 register int i; 232 register int fid; 233 234 if (name == NULL && (name = TZDEFAULT) == NULL) 235 return -1; 236 {
| 246 } 247} 248 249static int 250tzload(name, sp) 251register const char * name; 252register struct state * const sp; 253{ 254 register const char * p; 255 register int i; 256 register int fid; 257 258 if (name == NULL && (name = TZDEFAULT) == NULL) 259 return -1; 260 {
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237 register int doaccess;
| 261 register int doaccess; 262 /* 263 ** Section 4.9.1 of the C standard says that 264 ** "FILENAME_MAX expands to an integral constant expression 265 ** that is the sie needed for an array of char large enough 266 ** to hold the longest file name string that the implementation 267 ** guarantees can be opened." 268 */
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238 char fullname[FILENAME_MAX + 1]; 239 240 if (name[0] == ':') 241 ++name; 242 doaccess = name[0] == '/'; 243 if (!doaccess) { 244 if ((p = TZDIR) == NULL) 245 return -1; 246 if ((strlen(p) + strlen(name) + 1) >= sizeof fullname) 247 return -1; 248 (void) strcpy(fullname, p); 249 (void) strcat(fullname, "/"); 250 (void) strcat(fullname, name); 251 /* 252 ** Set doaccess if '.' (as in "../") shows up in name. 253 */ 254 if (strchr(name, '.') != NULL) 255 doaccess = TRUE; 256 name = fullname; 257 }
| 269 char fullname[FILENAME_MAX + 1]; 270 271 if (name[0] == ':') 272 ++name; 273 doaccess = name[0] == '/'; 274 if (!doaccess) { 275 if ((p = TZDIR) == NULL) 276 return -1; 277 if ((strlen(p) + strlen(name) + 1) >= sizeof fullname) 278 return -1; 279 (void) strcpy(fullname, p); 280 (void) strcat(fullname, "/"); 281 (void) strcat(fullname, name); 282 /* 283 ** Set doaccess if '.' (as in "../") shows up in name. 284 */ 285 if (strchr(name, '.') != NULL) 286 doaccess = TRUE; 287 name = fullname; 288 }
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258 if (doaccess && access(name, ACCESS_MODE) != 0)
| 289 if (doaccess && access(name, R_OK) != 0)
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259 return -1; 260 if ((fid = open(name, OPEN_MODE)) == -1) 261 return -1; 262 } 263 {
| 290 return -1; 291 if ((fid = open(name, OPEN_MODE)) == -1) 292 return -1; 293 } 294 {
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264 register const struct tzhead * tzhp; 265 char buf[sizeof *sp + sizeof *tzhp]; 266 int ttisstdcnt;
| 295 struct tzhead * tzhp; 296 char buf[sizeof *sp + sizeof *tzhp]; 297 int ttisstdcnt; 298 int ttisgmtcnt;
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267 268 i = read(fid, buf, sizeof buf);
| 299 300 i = read(fid, buf, sizeof buf);
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269 if (close(fid) != 0 || i < sizeof *tzhp)
| 301 if (close(fid) != 0)
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270 return -1;
| 302 return -1;
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271 tzhp = (struct tzhead *) buf; 272 ttisstdcnt = (int) detzcode(tzhp->tzh_ttisstdcnt); 273 sp->leapcnt = (int) detzcode(tzhp->tzh_leapcnt); 274 sp->timecnt = (int) detzcode(tzhp->tzh_timecnt); 275 sp->typecnt = (int) detzcode(tzhp->tzh_typecnt); 276 sp->charcnt = (int) detzcode(tzhp->tzh_charcnt);
| 303 p = buf; 304 p += sizeof tzhp->tzh_reserved; 305 ttisstdcnt = (int) detzcode(p); 306 p += 4; 307 ttisgmtcnt = (int) detzcode(p); 308 p += 4; 309 sp->leapcnt = (int) detzcode(p); 310 p += 4; 311 sp->timecnt = (int) detzcode(p); 312 p += 4; 313 sp->typecnt = (int) detzcode(p); 314 p += 4; 315 sp->charcnt = (int) detzcode(p); 316 p += 4;
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277 if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS || 278 sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES || 279 sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES || 280 sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
| 317 if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS || 318 sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES || 319 sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES || 320 sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
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281 (ttisstdcnt != sp->typecnt && ttisstdcnt != 0))
| 321 (ttisstdcnt != sp->typecnt && ttisstdcnt != 0) || 322 (ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
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282 return -1;
| 323 return -1;
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283 if (i < sizeof *tzhp + 284 sp->timecnt * (4 + sizeof (char)) + 285 sp->typecnt * (4 + 2 * sizeof (char)) + 286 sp->charcnt * sizeof (char) + 287 sp->leapcnt * 2 * 4 + 288 ttisstdcnt * sizeof (char))
| 324 if (i - (p - buf) < sp->timecnt * 4 + /* ats */ 325 sp->timecnt + /* types */ 326 sp->typecnt * (4 + 2) + /* ttinfos */ 327 sp->charcnt + /* chars */ 328 sp->leapcnt * (4 + 4) + /* lsinfos */ 329 ttisstdcnt + /* ttisstds */ 330 ttisgmtcnt) /* ttisgmts */
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289 return -1;
| 331 return -1;
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290 p = buf + sizeof *tzhp;
| |
291 for (i = 0; i < sp->timecnt; ++i) { 292 sp->ats[i] = detzcode(p); 293 p += 4; 294 } 295 for (i = 0; i < sp->timecnt; ++i) { 296 sp->types[i] = (unsigned char) *p++; 297 if (sp->types[i] >= sp->typecnt) 298 return -1; 299 } 300 for (i = 0; i < sp->typecnt; ++i) { 301 register struct ttinfo * ttisp; 302 303 ttisp = &sp->ttis[i]; 304 ttisp->tt_gmtoff = detzcode(p); 305 p += 4; 306 ttisp->tt_isdst = (unsigned char) *p++; 307 if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1) 308 return -1; 309 ttisp->tt_abbrind = (unsigned char) *p++; 310 if (ttisp->tt_abbrind < 0 || 311 ttisp->tt_abbrind > sp->charcnt) 312 return -1; 313 } 314 for (i = 0; i < sp->charcnt; ++i) 315 sp->chars[i] = *p++; 316 sp->chars[i] = '\0'; /* ensure '\0' at end */ 317 for (i = 0; i < sp->leapcnt; ++i) { 318 register struct lsinfo * lsisp; 319 320 lsisp = &sp->lsis[i]; 321 lsisp->ls_trans = detzcode(p); 322 p += 4; 323 lsisp->ls_corr = detzcode(p); 324 p += 4; 325 } 326 for (i = 0; i < sp->typecnt; ++i) { 327 register struct ttinfo * ttisp; 328 329 ttisp = &sp->ttis[i]; 330 if (ttisstdcnt == 0) 331 ttisp->tt_ttisstd = FALSE; 332 else { 333 ttisp->tt_ttisstd = *p++; 334 if (ttisp->tt_ttisstd != TRUE && 335 ttisp->tt_ttisstd != FALSE) 336 return -1; 337 } 338 }
| 332 for (i = 0; i < sp->timecnt; ++i) { 333 sp->ats[i] = detzcode(p); 334 p += 4; 335 } 336 for (i = 0; i < sp->timecnt; ++i) { 337 sp->types[i] = (unsigned char) *p++; 338 if (sp->types[i] >= sp->typecnt) 339 return -1; 340 } 341 for (i = 0; i < sp->typecnt; ++i) { 342 register struct ttinfo * ttisp; 343 344 ttisp = &sp->ttis[i]; 345 ttisp->tt_gmtoff = detzcode(p); 346 p += 4; 347 ttisp->tt_isdst = (unsigned char) *p++; 348 if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1) 349 return -1; 350 ttisp->tt_abbrind = (unsigned char) *p++; 351 if (ttisp->tt_abbrind < 0 || 352 ttisp->tt_abbrind > sp->charcnt) 353 return -1; 354 } 355 for (i = 0; i < sp->charcnt; ++i) 356 sp->chars[i] = *p++; 357 sp->chars[i] = '\0'; /* ensure '\0' at end */ 358 for (i = 0; i < sp->leapcnt; ++i) { 359 register struct lsinfo * lsisp; 360 361 lsisp = &sp->lsis[i]; 362 lsisp->ls_trans = detzcode(p); 363 p += 4; 364 lsisp->ls_corr = detzcode(p); 365 p += 4; 366 } 367 for (i = 0; i < sp->typecnt; ++i) { 368 register struct ttinfo * ttisp; 369 370 ttisp = &sp->ttis[i]; 371 if (ttisstdcnt == 0) 372 ttisp->tt_ttisstd = FALSE; 373 else { 374 ttisp->tt_ttisstd = *p++; 375 if (ttisp->tt_ttisstd != TRUE && 376 ttisp->tt_ttisstd != FALSE) 377 return -1; 378 } 379 }
|
| 380 for (i = 0; i < sp->typecnt; ++i) { 381 register struct ttinfo * ttisp; 382 383 ttisp = &sp->ttis[i]; 384 if (ttisgmtcnt == 0) 385 ttisp->tt_ttisgmt = FALSE; 386 else { 387 ttisp->tt_ttisgmt = *p++; 388 if (ttisp->tt_ttisgmt != TRUE && 389 ttisp->tt_ttisgmt != FALSE) 390 return -1; 391 } 392 }
|
339 } 340 return 0; 341} 342 343static const int mon_lengths[2][MONSPERYEAR] = { 344 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, 345 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } 346}; 347 348static const int year_lengths[2] = { 349 DAYSPERNYEAR, DAYSPERLYEAR 350}; 351 352/* 353** Given a pointer into a time zone string, scan until a character that is not 354** a valid character in a zone name is found. Return a pointer to that 355** character. 356*/ 357 358static const char * 359getzname(strp) 360register const char * strp; 361{ 362 register char c; 363 364 while ((c = *strp) != '\0' && !isdigit(c) && c != ',' && c != '-' && 365 c != '+') 366 ++strp; 367 return strp; 368} 369 370/* 371** Given a pointer into a time zone string, extract a number from that string. 372** Check that the number is within a specified range; if it is not, return 373** NULL. 374** Otherwise, return a pointer to the first character not part of the number. 375*/ 376 377static const char * 378getnum(strp, nump, min, max) 379register const char * strp; 380int * const nump; 381const int min; 382const int max; 383{ 384 register char c; 385 register int num; 386 387 if (strp == NULL || !isdigit(*strp)) 388 return NULL; 389 num = 0; 390 while ((c = *strp) != '\0' && isdigit(c)) { 391 num = num * 10 + (c - '0'); 392 if (num > max) 393 return NULL; /* illegal value */ 394 ++strp; 395 } 396 if (num < min) 397 return NULL; /* illegal value */ 398 *nump = num; 399 return strp; 400} 401 402/* 403** Given a pointer into a time zone string, extract a number of seconds, 404** in hh[:mm[:ss]] form, from the string. 405** If any error occurs, return NULL. 406** Otherwise, return a pointer to the first character not part of the number 407** of seconds. 408*/ 409 410static const char * 411getsecs(strp, secsp) 412register const char * strp; 413long * const secsp; 414{ 415 int num; 416
| 393 } 394 return 0; 395} 396 397static const int mon_lengths[2][MONSPERYEAR] = { 398 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, 399 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } 400}; 401 402static const int year_lengths[2] = { 403 DAYSPERNYEAR, DAYSPERLYEAR 404}; 405 406/* 407** Given a pointer into a time zone string, scan until a character that is not 408** a valid character in a zone name is found. Return a pointer to that 409** character. 410*/ 411 412static const char * 413getzname(strp) 414register const char * strp; 415{ 416 register char c; 417 418 while ((c = *strp) != '\0' && !isdigit(c) && c != ',' && c != '-' && 419 c != '+') 420 ++strp; 421 return strp; 422} 423 424/* 425** Given a pointer into a time zone string, extract a number from that string. 426** Check that the number is within a specified range; if it is not, return 427** NULL. 428** Otherwise, return a pointer to the first character not part of the number. 429*/ 430 431static const char * 432getnum(strp, nump, min, max) 433register const char * strp; 434int * const nump; 435const int min; 436const int max; 437{ 438 register char c; 439 register int num; 440 441 if (strp == NULL || !isdigit(*strp)) 442 return NULL; 443 num = 0; 444 while ((c = *strp) != '\0' && isdigit(c)) { 445 num = num * 10 + (c - '0'); 446 if (num > max) 447 return NULL; /* illegal value */ 448 ++strp; 449 } 450 if (num < min) 451 return NULL; /* illegal value */ 452 *nump = num; 453 return strp; 454} 455 456/* 457** Given a pointer into a time zone string, extract a number of seconds, 458** in hh[:mm[:ss]] form, from the string. 459** If any error occurs, return NULL. 460** Otherwise, return a pointer to the first character not part of the number 461** of seconds. 462*/ 463 464static const char * 465getsecs(strp, secsp) 466register const char * strp; 467long * const secsp; 468{ 469 int num; 470
|
417 strp = getnum(strp, &num, 0, HOURSPERDAY);
| 471 /* 472 ** `HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-Posix rules like 473 ** "M10.4.6/26", which does not conform to Posix, 474 ** but which specifies the equivalent of 475 ** ``02:00 on the first Sunday on or after 23 Oct''. 476 */ 477 strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
|
418 if (strp == NULL) 419 return NULL;
| 478 if (strp == NULL) 479 return NULL;
|
420 *secsp = num * SECSPERHOUR;
| 480 *secsp = num * (long) SECSPERHOUR;
|
421 if (*strp == ':') { 422 ++strp; 423 strp = getnum(strp, &num, 0, MINSPERHOUR - 1); 424 if (strp == NULL) 425 return NULL; 426 *secsp += num * SECSPERMIN; 427 if (*strp == ':') { 428 ++strp;
| 481 if (*strp == ':') { 482 ++strp; 483 strp = getnum(strp, &num, 0, MINSPERHOUR - 1); 484 if (strp == NULL) 485 return NULL; 486 *secsp += num * SECSPERMIN; 487 if (*strp == ':') { 488 ++strp;
|
429 strp = getnum(strp, &num, 0, SECSPERMIN - 1);
| 489 /* `SECSPERMIN' allows for leap seconds. */ 490 strp = getnum(strp, &num, 0, SECSPERMIN);
|
430 if (strp == NULL) 431 return NULL; 432 *secsp += num; 433 } 434 } 435 return strp; 436} 437 438/* 439** Given a pointer into a time zone string, extract an offset, in 440** [+-]hh[:mm[:ss]] form, from the string. 441** If any error occurs, return NULL. 442** Otherwise, return a pointer to the first character not part of the time. 443*/ 444 445static const char * 446getoffset(strp, offsetp) 447register const char * strp; 448long * const offsetp; 449{ 450 register int neg; 451 452 if (*strp == '-') { 453 neg = 1; 454 ++strp; 455 } else if (isdigit(*strp) || *strp++ == '+') 456 neg = 0; 457 else return NULL; /* illegal offset */ 458 strp = getsecs(strp, offsetp); 459 if (strp == NULL) 460 return NULL; /* illegal time */ 461 if (neg) 462 *offsetp = -*offsetp; 463 return strp; 464} 465 466/* 467** Given a pointer into a time zone string, extract a rule in the form 468** date[/time]. See POSIX section 8 for the format of "date" and "time". 469** If a valid rule is not found, return NULL. 470** Otherwise, return a pointer to the first character not part of the rule. 471*/ 472 473static const char * 474getrule(strp, rulep) 475const char * strp; 476register struct rule * const rulep; 477{ 478 if (*strp == 'J') { 479 /* 480 ** Julian day. 481 */ 482 rulep->r_type = JULIAN_DAY; 483 ++strp; 484 strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR); 485 } else if (*strp == 'M') { 486 /* 487 ** Month, week, day. 488 */ 489 rulep->r_type = MONTH_NTH_DAY_OF_WEEK; 490 ++strp; 491 strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR); 492 if (strp == NULL) 493 return NULL; 494 if (*strp++ != '.') 495 return NULL; 496 strp = getnum(strp, &rulep->r_week, 1, 5); 497 if (strp == NULL) 498 return NULL; 499 if (*strp++ != '.') 500 return NULL; 501 strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1); 502 } else if (isdigit(*strp)) { 503 /* 504 ** Day of year. 505 */ 506 rulep->r_type = DAY_OF_YEAR; 507 strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1); 508 } else return NULL; /* invalid format */ 509 if (strp == NULL) 510 return NULL; 511 if (*strp == '/') { 512 /* 513 ** Time specified. 514 */ 515 ++strp; 516 strp = getsecs(strp, &rulep->r_time); 517 } else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */ 518 return strp; 519} 520 521/* 522** Given the Epoch-relative time of January 1, 00:00:00 GMT, in a year, the 523** year, a rule, and the offset from GMT at the time that rule takes effect, 524** calculate the Epoch-relative time that rule takes effect. 525*/ 526 527static time_t 528transtime(janfirst, year, rulep, offset) 529const time_t janfirst; 530const int year; 531register const struct rule * const rulep; 532const long offset; 533{ 534 register int leapyear; 535 register time_t value; 536 register int i; 537 int d, m1, yy0, yy1, yy2, dow; 538
| 491 if (strp == NULL) 492 return NULL; 493 *secsp += num; 494 } 495 } 496 return strp; 497} 498 499/* 500** Given a pointer into a time zone string, extract an offset, in 501** [+-]hh[:mm[:ss]] form, from the string. 502** If any error occurs, return NULL. 503** Otherwise, return a pointer to the first character not part of the time. 504*/ 505 506static const char * 507getoffset(strp, offsetp) 508register const char * strp; 509long * const offsetp; 510{ 511 register int neg; 512 513 if (*strp == '-') { 514 neg = 1; 515 ++strp; 516 } else if (isdigit(*strp) || *strp++ == '+') 517 neg = 0; 518 else return NULL; /* illegal offset */ 519 strp = getsecs(strp, offsetp); 520 if (strp == NULL) 521 return NULL; /* illegal time */ 522 if (neg) 523 *offsetp = -*offsetp; 524 return strp; 525} 526 527/* 528** Given a pointer into a time zone string, extract a rule in the form 529** date[/time]. See POSIX section 8 for the format of "date" and "time". 530** If a valid rule is not found, return NULL. 531** Otherwise, return a pointer to the first character not part of the rule. 532*/ 533 534static const char * 535getrule(strp, rulep) 536const char * strp; 537register struct rule * const rulep; 538{ 539 if (*strp == 'J') { 540 /* 541 ** Julian day. 542 */ 543 rulep->r_type = JULIAN_DAY; 544 ++strp; 545 strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR); 546 } else if (*strp == 'M') { 547 /* 548 ** Month, week, day. 549 */ 550 rulep->r_type = MONTH_NTH_DAY_OF_WEEK; 551 ++strp; 552 strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR); 553 if (strp == NULL) 554 return NULL; 555 if (*strp++ != '.') 556 return NULL; 557 strp = getnum(strp, &rulep->r_week, 1, 5); 558 if (strp == NULL) 559 return NULL; 560 if (*strp++ != '.') 561 return NULL; 562 strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1); 563 } else if (isdigit(*strp)) { 564 /* 565 ** Day of year. 566 */ 567 rulep->r_type = DAY_OF_YEAR; 568 strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1); 569 } else return NULL; /* invalid format */ 570 if (strp == NULL) 571 return NULL; 572 if (*strp == '/') { 573 /* 574 ** Time specified. 575 */ 576 ++strp; 577 strp = getsecs(strp, &rulep->r_time); 578 } else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */ 579 return strp; 580} 581 582/* 583** Given the Epoch-relative time of January 1, 00:00:00 GMT, in a year, the 584** year, a rule, and the offset from GMT at the time that rule takes effect, 585** calculate the Epoch-relative time that rule takes effect. 586*/ 587 588static time_t 589transtime(janfirst, year, rulep, offset) 590const time_t janfirst; 591const int year; 592register const struct rule * const rulep; 593const long offset; 594{ 595 register int leapyear; 596 register time_t value; 597 register int i; 598 int d, m1, yy0, yy1, yy2, dow; 599
|
| 600 INITIALIZE(value);
|
539 leapyear = isleap(year); 540 switch (rulep->r_type) { 541 542 case JULIAN_DAY: 543 /* 544 ** Jn - Julian day, 1 == January 1, 60 == March 1 even in leap 545 ** years. 546 ** In non-leap years, or if the day number is 59 or less, just 547 ** add SECSPERDAY times the day number-1 to the time of 548 ** January 1, midnight, to get the day. 549 */ 550 value = janfirst + (rulep->r_day - 1) * SECSPERDAY; 551 if (leapyear && rulep->r_day >= 60) 552 value += SECSPERDAY; 553 break; 554 555 case DAY_OF_YEAR: 556 /* 557 ** n - day of year. 558 ** Just add SECSPERDAY times the day number to the time of 559 ** January 1, midnight, to get the day. 560 */ 561 value = janfirst + rulep->r_day * SECSPERDAY; 562 break; 563 564 case MONTH_NTH_DAY_OF_WEEK: 565 /* 566 ** Mm.n.d - nth "dth day" of month m. 567 */ 568 value = janfirst; 569 for (i = 0; i < rulep->r_mon - 1; ++i) 570 value += mon_lengths[leapyear][i] * SECSPERDAY; 571 572 /* 573 ** Use Zeller's Congruence to get day-of-week of first day of 574 ** month. 575 */ 576 m1 = (rulep->r_mon + 9) % 12 + 1; 577 yy0 = (rulep->r_mon <= 2) ? (year - 1) : year; 578 yy1 = yy0 / 100; 579 yy2 = yy0 % 100; 580 dow = ((26 * m1 - 2) / 10 + 581 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7; 582 if (dow < 0) 583 dow += DAYSPERWEEK; 584 585 /* 586 ** "dow" is the day-of-week of the first day of the month. Get 587 ** the day-of-month (zero-origin) of the first "dow" day of the 588 ** month. 589 */ 590 d = rulep->r_day - dow; 591 if (d < 0) 592 d += DAYSPERWEEK; 593 for (i = 1; i < rulep->r_week; ++i) { 594 if (d + DAYSPERWEEK >= 595 mon_lengths[leapyear][rulep->r_mon - 1]) 596 break; 597 d += DAYSPERWEEK; 598 } 599 600 /* 601 ** "d" is the day-of-month (zero-origin) of the day we want. 602 */ 603 value += d * SECSPERDAY; 604 break; 605 } 606 607 /* 608 ** "value" is the Epoch-relative time of 00:00:00 GMT on the day in 609 ** question. To get the Epoch-relative time of the specified local 610 ** time on that day, add the transition time and the current offset 611 ** from GMT. 612 */ 613 return value + rulep->r_time + offset; 614} 615 616/* 617** Given a POSIX section 8-style TZ string, fill in the rule tables as 618** appropriate. 619*/ 620 621static int 622tzparse(name, sp, lastditch) 623const char * name; 624register struct state * const sp; 625const int lastditch; 626{ 627 const char * stdname; 628 const char * dstname;
| 601 leapyear = isleap(year); 602 switch (rulep->r_type) { 603 604 case JULIAN_DAY: 605 /* 606 ** Jn - Julian day, 1 == January 1, 60 == March 1 even in leap 607 ** years. 608 ** In non-leap years, or if the day number is 59 or less, just 609 ** add SECSPERDAY times the day number-1 to the time of 610 ** January 1, midnight, to get the day. 611 */ 612 value = janfirst + (rulep->r_day - 1) * SECSPERDAY; 613 if (leapyear && rulep->r_day >= 60) 614 value += SECSPERDAY; 615 break; 616 617 case DAY_OF_YEAR: 618 /* 619 ** n - day of year. 620 ** Just add SECSPERDAY times the day number to the time of 621 ** January 1, midnight, to get the day. 622 */ 623 value = janfirst + rulep->r_day * SECSPERDAY; 624 break; 625 626 case MONTH_NTH_DAY_OF_WEEK: 627 /* 628 ** Mm.n.d - nth "dth day" of month m. 629 */ 630 value = janfirst; 631 for (i = 0; i < rulep->r_mon - 1; ++i) 632 value += mon_lengths[leapyear][i] * SECSPERDAY; 633 634 /* 635 ** Use Zeller's Congruence to get day-of-week of first day of 636 ** month. 637 */ 638 m1 = (rulep->r_mon + 9) % 12 + 1; 639 yy0 = (rulep->r_mon <= 2) ? (year - 1) : year; 640 yy1 = yy0 / 100; 641 yy2 = yy0 % 100; 642 dow = ((26 * m1 - 2) / 10 + 643 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7; 644 if (dow < 0) 645 dow += DAYSPERWEEK; 646 647 /* 648 ** "dow" is the day-of-week of the first day of the month. Get 649 ** the day-of-month (zero-origin) of the first "dow" day of the 650 ** month. 651 */ 652 d = rulep->r_day - dow; 653 if (d < 0) 654 d += DAYSPERWEEK; 655 for (i = 1; i < rulep->r_week; ++i) { 656 if (d + DAYSPERWEEK >= 657 mon_lengths[leapyear][rulep->r_mon - 1]) 658 break; 659 d += DAYSPERWEEK; 660 } 661 662 /* 663 ** "d" is the day-of-month (zero-origin) of the day we want. 664 */ 665 value += d * SECSPERDAY; 666 break; 667 } 668 669 /* 670 ** "value" is the Epoch-relative time of 00:00:00 GMT on the day in 671 ** question. To get the Epoch-relative time of the specified local 672 ** time on that day, add the transition time and the current offset 673 ** from GMT. 674 */ 675 return value + rulep->r_time + offset; 676} 677 678/* 679** Given a POSIX section 8-style TZ string, fill in the rule tables as 680** appropriate. 681*/ 682 683static int 684tzparse(name, sp, lastditch) 685const char * name; 686register struct state * const sp; 687const int lastditch; 688{ 689 const char * stdname; 690 const char * dstname;
|
629 int stdlen; 630 int dstlen;
| 691 size_t stdlen; 692 size_t dstlen;
|
631 long stdoffset; 632 long dstoffset; 633 register time_t * atp; 634 register unsigned char * typep; 635 register char * cp; 636 register int load_result; 637
| 693 long stdoffset; 694 long dstoffset; 695 register time_t * atp; 696 register unsigned char * typep; 697 register char * cp; 698 register int load_result; 699
|
| 700 INITIALIZE(dstname);
|
638 stdname = name; 639 if (lastditch) { 640 stdlen = strlen(name); /* length of standard zone name */ 641 name += stdlen; 642 if (stdlen >= sizeof sp->chars) 643 stdlen = (sizeof sp->chars) - 1; 644 } else { 645 name = getzname(name); 646 stdlen = name - stdname; 647 if (stdlen < 3) 648 return -1; 649 } 650 if (*name == '\0') 651 return -1; /* was "stdoffset = 0;" */ 652 else { 653 name = getoffset(name, &stdoffset); 654 if (name == NULL) 655 return -1; 656 } 657 load_result = tzload(TZDEFRULES, sp); 658 if (load_result != 0) 659 sp->leapcnt = 0; /* so, we're off a little */ 660 if (*name != '\0') { 661 dstname = name; 662 name = getzname(name); 663 dstlen = name - dstname; /* length of DST zone name */ 664 if (dstlen < 3) 665 return -1; 666 if (*name != '\0' && *name != ',' && *name != ';') { 667 name = getoffset(name, &dstoffset); 668 if (name == NULL) 669 return -1; 670 } else dstoffset = stdoffset - SECSPERHOUR; 671 if (*name == ',' || *name == ';') { 672 struct rule start; 673 struct rule end; 674 register int year; 675 register time_t janfirst; 676 time_t starttime; 677 time_t endtime; 678 679 ++name; 680 if ((name = getrule(name, &start)) == NULL) 681 return -1; 682 if (*name++ != ',') 683 return -1; 684 if ((name = getrule(name, &end)) == NULL) 685 return -1; 686 if (*name != '\0') 687 return -1; 688 sp->typecnt = 2; /* standard time and DST */ 689 /* 690 ** Two transitions per year, from EPOCH_YEAR to 2037. 691 */ 692 sp->timecnt = 2 * (2037 - EPOCH_YEAR + 1); 693 if (sp->timecnt > TZ_MAX_TIMES) 694 return -1; 695 sp->ttis[0].tt_gmtoff = -dstoffset; 696 sp->ttis[0].tt_isdst = 1; 697 sp->ttis[0].tt_abbrind = stdlen + 1; 698 sp->ttis[1].tt_gmtoff = -stdoffset; 699 sp->ttis[1].tt_isdst = 0; 700 sp->ttis[1].tt_abbrind = 0; 701 atp = sp->ats; 702 typep = sp->types; 703 janfirst = 0; 704 for (year = EPOCH_YEAR; year <= 2037; ++year) { 705 starttime = transtime(janfirst, year, &start, 706 stdoffset); 707 endtime = transtime(janfirst, year, &end, 708 dstoffset); 709 if (starttime > endtime) { 710 *atp++ = endtime; 711 *typep++ = 1; /* DST ends */ 712 *atp++ = starttime; 713 *typep++ = 0; /* DST begins */ 714 } else { 715 *atp++ = starttime; 716 *typep++ = 0; /* DST begins */ 717 *atp++ = endtime; 718 *typep++ = 1; /* DST ends */ 719 } 720 janfirst += year_lengths[isleap(year)] * 721 SECSPERDAY; 722 } 723 } else {
| 701 stdname = name; 702 if (lastditch) { 703 stdlen = strlen(name); /* length of standard zone name */ 704 name += stdlen; 705 if (stdlen >= sizeof sp->chars) 706 stdlen = (sizeof sp->chars) - 1; 707 } else { 708 name = getzname(name); 709 stdlen = name - stdname; 710 if (stdlen < 3) 711 return -1; 712 } 713 if (*name == '\0') 714 return -1; /* was "stdoffset = 0;" */ 715 else { 716 name = getoffset(name, &stdoffset); 717 if (name == NULL) 718 return -1; 719 } 720 load_result = tzload(TZDEFRULES, sp); 721 if (load_result != 0) 722 sp->leapcnt = 0; /* so, we're off a little */ 723 if (*name != '\0') { 724 dstname = name; 725 name = getzname(name); 726 dstlen = name - dstname; /* length of DST zone name */ 727 if (dstlen < 3) 728 return -1; 729 if (*name != '\0' && *name != ',' && *name != ';') { 730 name = getoffset(name, &dstoffset); 731 if (name == NULL) 732 return -1; 733 } else dstoffset = stdoffset - SECSPERHOUR; 734 if (*name == ',' || *name == ';') { 735 struct rule start; 736 struct rule end; 737 register int year; 738 register time_t janfirst; 739 time_t starttime; 740 time_t endtime; 741 742 ++name; 743 if ((name = getrule(name, &start)) == NULL) 744 return -1; 745 if (*name++ != ',') 746 return -1; 747 if ((name = getrule(name, &end)) == NULL) 748 return -1; 749 if (*name != '\0') 750 return -1; 751 sp->typecnt = 2; /* standard time and DST */ 752 /* 753 ** Two transitions per year, from EPOCH_YEAR to 2037. 754 */ 755 sp->timecnt = 2 * (2037 - EPOCH_YEAR + 1); 756 if (sp->timecnt > TZ_MAX_TIMES) 757 return -1; 758 sp->ttis[0].tt_gmtoff = -dstoffset; 759 sp->ttis[0].tt_isdst = 1; 760 sp->ttis[0].tt_abbrind = stdlen + 1; 761 sp->ttis[1].tt_gmtoff = -stdoffset; 762 sp->ttis[1].tt_isdst = 0; 763 sp->ttis[1].tt_abbrind = 0; 764 atp = sp->ats; 765 typep = sp->types; 766 janfirst = 0; 767 for (year = EPOCH_YEAR; year <= 2037; ++year) { 768 starttime = transtime(janfirst, year, &start, 769 stdoffset); 770 endtime = transtime(janfirst, year, &end, 771 dstoffset); 772 if (starttime > endtime) { 773 *atp++ = endtime; 774 *typep++ = 1; /* DST ends */ 775 *atp++ = starttime; 776 *typep++ = 0; /* DST begins */ 777 } else { 778 *atp++ = starttime; 779 *typep++ = 0; /* DST begins */ 780 *atp++ = endtime; 781 *typep++ = 1; /* DST ends */ 782 } 783 janfirst += year_lengths[isleap(year)] * 784 SECSPERDAY; 785 } 786 } else {
|
724 int sawstd; 725 int sawdst; 726 long stdfix; 727 long dstfix; 728 long oldfix; 729 int isdst;
| 787 register long theirstdoffset; 788 register long theirdstoffset; 789 register long theiroffset; 790 register int isdst;
|
730 register int i;
| 791 register int i;
|
| 792 register int j;
|
731 732 if (*name != '\0') 733 return -1; 734 if (load_result != 0) 735 return -1; 736 /*
| 793 794 if (*name != '\0') 795 return -1; 796 if (load_result != 0) 797 return -1; 798 /*
|
737 ** Compute the difference between the real and 738 ** prototype standard and summer time offsets 739 ** from GMT, and put the real standard and summer 740 ** time offsets into the rules in place of the 741 ** prototype offsets.
| 799 ** Initial values of theirstdoffset and theirdstoffset.
|
742 */
| 800 */
|
743 sawstd = FALSE; 744 sawdst = FALSE; 745 stdfix = 0; 746 dstfix = 0; 747 for (i = 0; i < sp->typecnt; ++i) { 748 if (sp->ttis[i].tt_isdst) { 749 oldfix = dstfix; 750 dstfix = sp->ttis[i].tt_gmtoff + 751 dstoffset; 752 if (sawdst && (oldfix != dstfix)) 753 return -1; 754 sp->ttis[i].tt_gmtoff = -dstoffset; 755 sp->ttis[i].tt_abbrind = stdlen + 1; 756 sawdst = TRUE; 757 } else { 758 oldfix = stdfix; 759 stdfix = sp->ttis[i].tt_gmtoff + 760 stdoffset; 761 if (sawstd && (oldfix != stdfix)) 762 return -1; 763 sp->ttis[i].tt_gmtoff = -stdoffset; 764 sp->ttis[i].tt_abbrind = 0; 765 sawstd = TRUE;
| 801 theirstdoffset = 0; 802 for (i = 0; i < sp->timecnt; ++i) { 803 j = sp->types[i]; 804 if (!sp->ttis[j].tt_isdst) { 805 theirstdoffset = -sp->ttis[j].tt_gmtoff; 806 break;
|
766 } 767 }
| 807 } 808 }
|
| 809 theirdstoffset = 0; 810 for (i = 0; i < sp->timecnt; ++i) { 811 j = sp->types[i]; 812 if (sp->ttis[j].tt_isdst) { 813 theirdstoffset = -sp->ttis[j].tt_gmtoff; 814 break; 815 } 816 }
|
768 /*
| 817 /*
|
769 ** Make sure we have both standard and summer time.
| 818 ** Initially we're assumed to be in standard time.
|
770 */
| 819 */
|
771 if (!sawdst || !sawstd) 772 return -1;
| 820 isdst = FALSE; 821 theiroffset = theirstdoffset;
|
773 /*
| 822 /*
|
774 ** Now correct the transition times by shifting 775 ** them by the difference between the real and 776 ** prototype offsets. Note that this difference 777 ** can be different in standard and summer time; 778 ** the prototype probably has a 1-hour difference 779 ** between standard and summer time, but a different 780 ** difference can be specified in TZ.
| 823 ** Now juggle transition times and types 824 ** tracking offsets as you do.
|
781 */
| 825 */
|
782 isdst = FALSE; /* we start in standard time */
| |
783 for (i = 0; i < sp->timecnt; ++i) {
| 826 for (i = 0; i < sp->timecnt; ++i) {
|
784 register const struct ttinfo * ttisp; 785 786 /* 787 ** If summer time is in effect, and the 788 ** transition time was not specified as 789 ** standard time, add the summer time 790 ** offset to the transition time; 791 ** otherwise, add the standard time offset 792 ** to the transition time. 793 */ 794 ttisp = &sp->ttis[sp->types[i]]; 795 sp->ats[i] += 796 (isdst && !ttisp->tt_ttisstd) ? 797 dstfix : stdfix; 798 isdst = ttisp->tt_isdst;
| 827 j = sp->types[i]; 828 sp->types[i] = sp->ttis[j].tt_isdst; 829 if (sp->ttis[j].tt_ttisgmt) { 830 /* No adjustment to transition time */ 831 } else { 832 /* 833 ** If summer time is in effect, and the 834 ** transition time was not specified as 835 ** standard time, add the summer time 836 ** offset to the transition time; 837 ** otherwise, add the standard time 838 ** offset to the transition time. 839 */ 840 /* 841 ** Transitions from DST to DDST 842 ** will effectively disappear since 843 ** POSIX provides for only one DST 844 ** offset. 845 */ 846 if (isdst && !sp->ttis[j].tt_ttisstd) { 847 sp->ats[i] += dstoffset - 848 theirdstoffset; 849 } else { 850 sp->ats[i] += stdoffset - 851 theirstdoffset; 852 } 853 } 854 theiroffset = -sp->ttis[j].tt_gmtoff; 855 if (sp->ttis[j].tt_isdst) 856 theirdstoffset = theiroffset; 857 else theirstdoffset = theiroffset;
|
799 }
| 858 }
|
| 859 /* 860 ** Finally, fill in ttis. 861 ** ttisstd and ttisgmt need not be handled. 862 */ 863 sp->ttis[0].tt_gmtoff = -stdoffset; 864 sp->ttis[0].tt_isdst = FALSE; 865 sp->ttis[0].tt_abbrind = 0; 866 sp->ttis[1].tt_gmtoff = -dstoffset; 867 sp->ttis[1].tt_isdst = TRUE; 868 sp->ttis[1].tt_abbrind = stdlen + 1;
|
800 } 801 } else { 802 dstlen = 0; 803 sp->typecnt = 1; /* only standard time */ 804 sp->timecnt = 0; 805 sp->ttis[0].tt_gmtoff = -stdoffset; 806 sp->ttis[0].tt_isdst = 0; 807 sp->ttis[0].tt_abbrind = 0; 808 } 809 sp->charcnt = stdlen + 1; 810 if (dstlen != 0) 811 sp->charcnt += dstlen + 1; 812 if (sp->charcnt > sizeof sp->chars) 813 return -1; 814 cp = sp->chars; 815 (void) strncpy(cp, stdname, stdlen); 816 cp += stdlen; 817 *cp++ = '\0'; 818 if (dstlen != 0) { 819 (void) strncpy(cp, dstname, dstlen); 820 *(cp + dstlen) = '\0'; 821 } 822 return 0; 823} 824 825static void 826gmtload(sp) 827struct state * const sp; 828{
| 869 } 870 } else { 871 dstlen = 0; 872 sp->typecnt = 1; /* only standard time */ 873 sp->timecnt = 0; 874 sp->ttis[0].tt_gmtoff = -stdoffset; 875 sp->ttis[0].tt_isdst = 0; 876 sp->ttis[0].tt_abbrind = 0; 877 } 878 sp->charcnt = stdlen + 1; 879 if (dstlen != 0) 880 sp->charcnt += dstlen + 1; 881 if (sp->charcnt > sizeof sp->chars) 882 return -1; 883 cp = sp->chars; 884 (void) strncpy(cp, stdname, stdlen); 885 cp += stdlen; 886 *cp++ = '\0'; 887 if (dstlen != 0) { 888 (void) strncpy(cp, dstname, dstlen); 889 *(cp + dstlen) = '\0'; 890 } 891 return 0; 892} 893 894static void 895gmtload(sp) 896struct state * const sp; 897{
|
829 if (tzload(GMT, sp) != 0) 830 (void) tzparse(GMT, sp, TRUE);
| 898 if (tzload(gmt, sp) != 0) 899 (void) tzparse(gmt, sp, TRUE);
|
831} 832 833#ifndef STD_INSPIRED
| 900} 901 902#ifndef STD_INSPIRED
|
| 903/* 904** A non-static declaration of tzsetwall in a system header file 905** may cause a warning about this upcoming static declaration... 906*/
|
834static 835#endif /* !defined STD_INSPIRED */ 836void
| 907static 908#endif /* !defined STD_INSPIRED */ 909void
|
837tzsetwall()
| 910tzsetwall P((void))
|
838{
| 911{
|
839 lcl_is_set = TRUE;
| 912 if (lcl_is_set < 0) 913 return; 914 lcl_is_set = -1; 915
|
840#ifdef ALL_STATE 841 if (lclptr == NULL) { 842 lclptr = (struct state *) malloc(sizeof *lclptr); 843 if (lclptr == NULL) { 844 settzname(); /* all we can do */ 845 return; 846 } 847 } 848#endif /* defined ALL_STATE */ 849 if (tzload((char *) NULL, lclptr) != 0) 850 gmtload(lclptr); 851 settzname(); 852} 853 854void
| 916#ifdef ALL_STATE 917 if (lclptr == NULL) { 918 lclptr = (struct state *) malloc(sizeof *lclptr); 919 if (lclptr == NULL) { 920 settzname(); /* all we can do */ 921 return; 922 } 923 } 924#endif /* defined ALL_STATE */ 925 if (tzload((char *) NULL, lclptr) != 0) 926 gmtload(lclptr); 927 settzname(); 928} 929 930void
|
855tzset()
| 931tzset P((void))
|
856{ 857 register const char * name; 858 859 name = getenv("TZ"); 860 if (name == NULL) { 861 tzsetwall(); 862 return; 863 }
| 932{ 933 register const char * name; 934 935 name = getenv("TZ"); 936 if (name == NULL) { 937 tzsetwall(); 938 return; 939 }
|
864 lcl_is_set = TRUE;
| 940 941 if (lcl_is_set > 0 && strcmp(lcl_TZname, name) == 0) 942 return; 943 lcl_is_set = (strlen(name) < sizeof(lcl_TZname)); 944 if (lcl_is_set) 945 (void) strcpy(lcl_TZname, name); 946
|
865#ifdef ALL_STATE 866 if (lclptr == NULL) { 867 lclptr = (struct state *) malloc(sizeof *lclptr); 868 if (lclptr == NULL) { 869 settzname(); /* all we can do */ 870 return; 871 } 872 } 873#endif /* defined ALL_STATE */ 874 if (*name == '\0') { 875 /* 876 ** User wants it fast rather than right. 877 */ 878 lclptr->leapcnt = 0; /* so, we're off a little */ 879 lclptr->timecnt = 0; 880 lclptr->ttis[0].tt_gmtoff = 0; 881 lclptr->ttis[0].tt_abbrind = 0;
| 947#ifdef ALL_STATE 948 if (lclptr == NULL) { 949 lclptr = (struct state *) malloc(sizeof *lclptr); 950 if (lclptr == NULL) { 951 settzname(); /* all we can do */ 952 return; 953 } 954 } 955#endif /* defined ALL_STATE */ 956 if (*name == '\0') { 957 /* 958 ** User wants it fast rather than right. 959 */ 960 lclptr->leapcnt = 0; /* so, we're off a little */ 961 lclptr->timecnt = 0; 962 lclptr->ttis[0].tt_gmtoff = 0; 963 lclptr->ttis[0].tt_abbrind = 0;
|
882 (void) strcpy(lclptr->chars, GMT);
| 964 (void) strcpy(lclptr->chars, gmt);
|
883 } else if (tzload(name, lclptr) != 0) 884 if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0) 885 (void) gmtload(lclptr); 886 settzname(); 887} 888 889/* 890** The easy way to behave "as if no library function calls" localtime 891** is to not call it--so we drop its guts into "localsub", which can be 892** freely called. (And no, the PANS doesn't require the above behavior-- 893** but it *is* desirable.) 894** 895** The unused offset argument is for the benefit of mktime variants. 896*/ 897 898/*ARGSUSED*/ 899static void 900localsub(timep, offset, tmp) 901const time_t * const timep; 902const long offset; 903struct tm * const tmp; 904{
| 965 } else if (tzload(name, lclptr) != 0) 966 if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0) 967 (void) gmtload(lclptr); 968 settzname(); 969} 970 971/* 972** The easy way to behave "as if no library function calls" localtime 973** is to not call it--so we drop its guts into "localsub", which can be 974** freely called. (And no, the PANS doesn't require the above behavior-- 975** but it *is* desirable.) 976** 977** The unused offset argument is for the benefit of mktime variants. 978*/ 979 980/*ARGSUSED*/ 981static void 982localsub(timep, offset, tmp) 983const time_t * const timep; 984const long offset; 985struct tm * const tmp; 986{
|
905 register const struct state * sp;
| 987 register struct state * sp;
|
906 register const struct ttinfo * ttisp; 907 register int i; 908 const time_t t = *timep; 909
| 988 register const struct ttinfo * ttisp; 989 register int i; 990 const time_t t = *timep; 991
|
910 if (!lcl_is_set) 911 tzset();
| |
912 sp = lclptr; 913#ifdef ALL_STATE 914 if (sp == NULL) { 915 gmtsub(timep, offset, tmp); 916 return; 917 } 918#endif /* defined ALL_STATE */ 919 if (sp->timecnt == 0 || t < sp->ats[0]) { 920 i = 0; 921 while (sp->ttis[i].tt_isdst) 922 if (++i >= sp->typecnt) { 923 i = 0; 924 break; 925 } 926 } else { 927 for (i = 1; i < sp->timecnt; ++i) 928 if (t < sp->ats[i]) 929 break; 930 i = sp->types[i - 1]; 931 } 932 ttisp = &sp->ttis[i]; 933 /* 934 ** To get (wrong) behavior that's compatible with System V Release 2.0 935 ** you'd replace the statement below with 936 ** t += ttisp->tt_gmtoff; 937 ** timesub(&t, 0L, sp, tmp); 938 */ 939 timesub(&t, ttisp->tt_gmtoff, sp, tmp); 940 tmp->tm_isdst = ttisp->tt_isdst;
| 992 sp = lclptr; 993#ifdef ALL_STATE 994 if (sp == NULL) { 995 gmtsub(timep, offset, tmp); 996 return; 997 } 998#endif /* defined ALL_STATE */ 999 if (sp->timecnt == 0 || t < sp->ats[0]) { 1000 i = 0; 1001 while (sp->ttis[i].tt_isdst) 1002 if (++i >= sp->typecnt) { 1003 i = 0; 1004 break; 1005 } 1006 } else { 1007 for (i = 1; i < sp->timecnt; ++i) 1008 if (t < sp->ats[i]) 1009 break; 1010 i = sp->types[i - 1]; 1011 } 1012 ttisp = &sp->ttis[i]; 1013 /* 1014 ** To get (wrong) behavior that's compatible with System V Release 2.0 1015 ** you'd replace the statement below with 1016 ** t += ttisp->tt_gmtoff; 1017 ** timesub(&t, 0L, sp, tmp); 1018 */ 1019 timesub(&t, ttisp->tt_gmtoff, sp, tmp); 1020 tmp->tm_isdst = ttisp->tt_isdst;
|
941 tzname[tmp->tm_isdst] = (char *) &sp->chars[ttisp->tt_abbrind];
| 1021 tzname[tmp->tm_isdst] = &sp->chars[ttisp->tt_abbrind];
|
942#ifdef TM_ZONE
| 1022#ifdef TM_ZONE
|
943 tmp->TM_ZONE = (char *)&sp->chars[ttisp->tt_abbrind];
| 1023 tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
|
944#endif /* defined TM_ZONE */ 945} 946 947struct tm * 948localtime(timep) 949const time_t * const timep; 950{
| 1024#endif /* defined TM_ZONE */ 1025} 1026 1027struct tm * 1028localtime(timep) 1029const time_t * const timep; 1030{
|
951 static struct tm tm; 952
| 1031 tzset();
|
953 localsub(timep, 0L, &tm); 954 return &tm; 955} 956 957/* 958** gmtsub is to gmtime as localsub is to localtime. 959*/ 960 961static void 962gmtsub(timep, offset, tmp) 963const time_t * const timep; 964const long offset; 965struct tm * const tmp; 966{ 967 if (!gmt_is_set) { 968 gmt_is_set = TRUE; 969#ifdef ALL_STATE 970 gmtptr = (struct state *) malloc(sizeof *gmtptr); 971 if (gmtptr != NULL) 972#endif /* defined ALL_STATE */ 973 gmtload(gmtptr); 974 } 975 timesub(timep, offset, gmtptr, tmp); 976#ifdef TM_ZONE 977 /* 978 ** Could get fancy here and deliver something such as 979 ** "GMT+xxxx" or "GMT-xxxx" if offset is non-zero, 980 ** but this is no time for a treasure hunt. 981 */ 982 if (offset != 0)
| 1032 localsub(timep, 0L, &tm); 1033 return &tm; 1034} 1035 1036/* 1037** gmtsub is to gmtime as localsub is to localtime. 1038*/ 1039 1040static void 1041gmtsub(timep, offset, tmp) 1042const time_t * const timep; 1043const long offset; 1044struct tm * const tmp; 1045{ 1046 if (!gmt_is_set) { 1047 gmt_is_set = TRUE; 1048#ifdef ALL_STATE 1049 gmtptr = (struct state *) malloc(sizeof *gmtptr); 1050 if (gmtptr != NULL) 1051#endif /* defined ALL_STATE */ 1052 gmtload(gmtptr); 1053 } 1054 timesub(timep, offset, gmtptr, tmp); 1055#ifdef TM_ZONE 1056 /* 1057 ** Could get fancy here and deliver something such as 1058 ** "GMT+xxxx" or "GMT-xxxx" if offset is non-zero, 1059 ** but this is no time for a treasure hunt. 1060 */ 1061 if (offset != 0)
|
983 tmp->TM_ZONE = WILDABBR;
| 1062 tmp->TM_ZONE = wildabbr;
|
984 else { 985#ifdef ALL_STATE 986 if (gmtptr == NULL)
| 1063 else { 1064#ifdef ALL_STATE 1065 if (gmtptr == NULL)
|
987 tmp->TM_ZONE = GMT;
| 1066 tmp->TM_ZONE = gmt;
|
988 else tmp->TM_ZONE = gmtptr->chars; 989#endif /* defined ALL_STATE */ 990#ifndef ALL_STATE 991 tmp->TM_ZONE = gmtptr->chars; 992#endif /* State Farm */ 993 } 994#endif /* defined TM_ZONE */ 995} 996 997struct tm * 998gmtime(timep) 999const time_t * const timep; 1000{
| 1067 else tmp->TM_ZONE = gmtptr->chars; 1068#endif /* defined ALL_STATE */ 1069#ifndef ALL_STATE 1070 tmp->TM_ZONE = gmtptr->chars; 1071#endif /* State Farm */ 1072 } 1073#endif /* defined TM_ZONE */ 1074} 1075 1076struct tm * 1077gmtime(timep) 1078const time_t * const timep; 1079{
|
1001 static struct tm tm; 1002
| |
1003 gmtsub(timep, 0L, &tm); 1004 return &tm; 1005} 1006 1007#ifdef STD_INSPIRED 1008 1009struct tm * 1010offtime(timep, offset) 1011const time_t * const timep; 1012const long offset; 1013{
| 1080 gmtsub(timep, 0L, &tm); 1081 return &tm; 1082} 1083 1084#ifdef STD_INSPIRED 1085 1086struct tm * 1087offtime(timep, offset) 1088const time_t * const timep; 1089const long offset; 1090{
|
1014 static struct tm tm; 1015
| |
1016 gmtsub(timep, offset, &tm); 1017 return &tm; 1018} 1019 1020#endif /* defined STD_INSPIRED */ 1021 1022static void 1023timesub(timep, offset, sp, tmp) 1024const time_t * const timep; 1025const long offset; 1026register const struct state * const sp; 1027register struct tm * const tmp; 1028{ 1029 register const struct lsinfo * lp; 1030 register long days; 1031 register long rem; 1032 register int y; 1033 register int yleap; 1034 register const int * ip; 1035 register long corr; 1036 register int hit; 1037 register int i; 1038 1039 corr = 0; 1040 hit = 0; 1041#ifdef ALL_STATE 1042 i = (sp == NULL) ? 0 : sp->leapcnt; 1043#endif /* defined ALL_STATE */ 1044#ifndef ALL_STATE 1045 i = sp->leapcnt; 1046#endif /* State Farm */ 1047 while (--i >= 0) { 1048 lp = &sp->lsis[i]; 1049 if (*timep >= lp->ls_trans) { 1050 if (*timep == lp->ls_trans) { 1051 hit = ((i == 0 && lp->ls_corr > 0) || 1052 lp->ls_corr > sp->lsis[i - 1].ls_corr); 1053 if (hit) 1054 while (i > 0 && 1055 sp->lsis[i].ls_trans == 1056 sp->lsis[i - 1].ls_trans + 1 && 1057 sp->lsis[i].ls_corr == 1058 sp->lsis[i - 1].ls_corr + 1) { 1059 ++hit; 1060 --i; 1061 } 1062 } 1063 corr = lp->ls_corr; 1064 break; 1065 } 1066 } 1067 days = *timep / SECSPERDAY; 1068 rem = *timep % SECSPERDAY; 1069#ifdef mc68k 1070 if (*timep == 0x80000000) { 1071 /* 1072 ** A 3B1 muffs the division on the most negative number. 1073 */ 1074 days = -24855; 1075 rem = -11648; 1076 }
| 1091 gmtsub(timep, offset, &tm); 1092 return &tm; 1093} 1094 1095#endif /* defined STD_INSPIRED */ 1096 1097static void 1098timesub(timep, offset, sp, tmp) 1099const time_t * const timep; 1100const long offset; 1101register const struct state * const sp; 1102register struct tm * const tmp; 1103{ 1104 register const struct lsinfo * lp; 1105 register long days; 1106 register long rem; 1107 register int y; 1108 register int yleap; 1109 register const int * ip; 1110 register long corr; 1111 register int hit; 1112 register int i; 1113 1114 corr = 0; 1115 hit = 0; 1116#ifdef ALL_STATE 1117 i = (sp == NULL) ? 0 : sp->leapcnt; 1118#endif /* defined ALL_STATE */ 1119#ifndef ALL_STATE 1120 i = sp->leapcnt; 1121#endif /* State Farm */ 1122 while (--i >= 0) { 1123 lp = &sp->lsis[i]; 1124 if (*timep >= lp->ls_trans) { 1125 if (*timep == lp->ls_trans) { 1126 hit = ((i == 0 && lp->ls_corr > 0) || 1127 lp->ls_corr > sp->lsis[i - 1].ls_corr); 1128 if (hit) 1129 while (i > 0 && 1130 sp->lsis[i].ls_trans == 1131 sp->lsis[i - 1].ls_trans + 1 && 1132 sp->lsis[i].ls_corr == 1133 sp->lsis[i - 1].ls_corr + 1) { 1134 ++hit; 1135 --i; 1136 } 1137 } 1138 corr = lp->ls_corr; 1139 break; 1140 } 1141 } 1142 days = *timep / SECSPERDAY; 1143 rem = *timep % SECSPERDAY; 1144#ifdef mc68k 1145 if (*timep == 0x80000000) { 1146 /* 1147 ** A 3B1 muffs the division on the most negative number. 1148 */ 1149 days = -24855; 1150 rem = -11648; 1151 }
|
1077#endif /* mc68k */
| 1152#endif /* defined mc68k */
|
1078 rem += (offset - corr); 1079 while (rem < 0) { 1080 rem += SECSPERDAY; 1081 --days; 1082 } 1083 while (rem >= SECSPERDAY) { 1084 rem -= SECSPERDAY; 1085 ++days; 1086 } 1087 tmp->tm_hour = (int) (rem / SECSPERHOUR); 1088 rem = rem % SECSPERHOUR; 1089 tmp->tm_min = (int) (rem / SECSPERMIN); 1090 tmp->tm_sec = (int) (rem % SECSPERMIN); 1091 if (hit) 1092 /* 1093 ** A positive leap second requires a special 1094 ** representation. This uses "... ??:59:60" et seq. 1095 */ 1096 tmp->tm_sec += hit; 1097 tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK); 1098 if (tmp->tm_wday < 0) 1099 tmp->tm_wday += DAYSPERWEEK; 1100 y = EPOCH_YEAR; 1101 if (days >= 0) 1102 for ( ; ; ) { 1103 yleap = isleap(y); 1104 if (days < (long) year_lengths[yleap]) 1105 break; 1106 ++y; 1107 days = days - (long) year_lengths[yleap]; 1108 } 1109 else do { 1110 --y; 1111 yleap = isleap(y); 1112 days = days + (long) year_lengths[yleap]; 1113 } while (days < 0); 1114 tmp->tm_year = y - TM_YEAR_BASE; 1115 tmp->tm_yday = (int) days; 1116 ip = mon_lengths[yleap]; 1117 for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon)) 1118 days = days - (long) ip[tmp->tm_mon]; 1119 tmp->tm_mday = (int) (days + 1); 1120 tmp->tm_isdst = 0; 1121#ifdef TM_GMTOFF 1122 tmp->TM_GMTOFF = offset; 1123#endif /* defined TM_GMTOFF */ 1124} 1125 1126char * 1127ctime(timep) 1128const time_t * const timep; 1129{
| 1153 rem += (offset - corr); 1154 while (rem < 0) { 1155 rem += SECSPERDAY; 1156 --days; 1157 } 1158 while (rem >= SECSPERDAY) { 1159 rem -= SECSPERDAY; 1160 ++days; 1161 } 1162 tmp->tm_hour = (int) (rem / SECSPERHOUR); 1163 rem = rem % SECSPERHOUR; 1164 tmp->tm_min = (int) (rem / SECSPERMIN); 1165 tmp->tm_sec = (int) (rem % SECSPERMIN); 1166 if (hit) 1167 /* 1168 ** A positive leap second requires a special 1169 ** representation. This uses "... ??:59:60" et seq. 1170 */ 1171 tmp->tm_sec += hit; 1172 tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK); 1173 if (tmp->tm_wday < 0) 1174 tmp->tm_wday += DAYSPERWEEK; 1175 y = EPOCH_YEAR; 1176 if (days >= 0) 1177 for ( ; ; ) { 1178 yleap = isleap(y); 1179 if (days < (long) year_lengths[yleap]) 1180 break; 1181 ++y; 1182 days = days - (long) year_lengths[yleap]; 1183 } 1184 else do { 1185 --y; 1186 yleap = isleap(y); 1187 days = days + (long) year_lengths[yleap]; 1188 } while (days < 0); 1189 tmp->tm_year = y - TM_YEAR_BASE; 1190 tmp->tm_yday = (int) days; 1191 ip = mon_lengths[yleap]; 1192 for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon)) 1193 days = days - (long) ip[tmp->tm_mon]; 1194 tmp->tm_mday = (int) (days + 1); 1195 tmp->tm_isdst = 0; 1196#ifdef TM_GMTOFF 1197 tmp->TM_GMTOFF = offset; 1198#endif /* defined TM_GMTOFF */ 1199} 1200 1201char * 1202ctime(timep) 1203const time_t * const timep; 1204{
|
| 1205/* 1206** Section 4.12.3.2 of X3.159-1989 requires that 1207** The ctime funciton converts the calendar time pointed to by timer 1208** to local time in the form of a string. It is equivalent to 1209** asctime(localtime(timer)) 1210*/
|
1130 return asctime(localtime(timep)); 1131} 1132 1133/* 1134** Adapted from code provided by Robert Elz, who writes: 1135** The "best" way to do mktime I think is based on an idea of Bob 1136** Kridle's (so its said...) from a long time ago. (mtxinu!kridle now). 1137** It does a binary search of the time_t space. Since time_t's are 1138** just 32 bits, its a max of 32 iterations (even at 64 bits it 1139** would still be very reasonable). 1140*/ 1141 1142#ifndef WRONG 1143#define WRONG (-1) 1144#endif /* !defined WRONG */ 1145 1146/* 1147** Simplified normalize logic courtesy Paul Eggert (eggert@twinsun.com). 1148*/ 1149 1150static int 1151increment_overflow(number, delta) 1152int * number; 1153int delta; 1154{
| 1211 return asctime(localtime(timep)); 1212} 1213 1214/* 1215** Adapted from code provided by Robert Elz, who writes: 1216** The "best" way to do mktime I think is based on an idea of Bob 1217** Kridle's (so its said...) from a long time ago. (mtxinu!kridle now). 1218** It does a binary search of the time_t space. Since time_t's are 1219** just 32 bits, its a max of 32 iterations (even at 64 bits it 1220** would still be very reasonable). 1221*/ 1222 1223#ifndef WRONG 1224#define WRONG (-1) 1225#endif /* !defined WRONG */ 1226 1227/* 1228** Simplified normalize logic courtesy Paul Eggert (eggert@twinsun.com). 1229*/ 1230 1231static int 1232increment_overflow(number, delta) 1233int * number; 1234int delta; 1235{
|
1155 int number0;
| 1236 int number0;
|
1156 1157 number0 = *number; 1158 *number += delta; 1159 return (*number < number0) != (delta < 0); 1160} 1161 1162static int 1163normalize_overflow(tensptr, unitsptr, base) 1164int * const tensptr; 1165int * const unitsptr; 1166const int base; 1167{ 1168 register int tensdelta; 1169 1170 tensdelta = (*unitsptr >= 0) ? 1171 (*unitsptr / base) : 1172 (-1 - (-1 - *unitsptr) / base); 1173 *unitsptr -= tensdelta * base; 1174 return increment_overflow(tensptr, tensdelta); 1175} 1176 1177static int 1178tmcomp(atmp, btmp) 1179register const struct tm * const atmp; 1180register const struct tm * const btmp; 1181{ 1182 register int result; 1183 1184 if ((result = (atmp->tm_year - btmp->tm_year)) == 0 && 1185 (result = (atmp->tm_mon - btmp->tm_mon)) == 0 && 1186 (result = (atmp->tm_mday - btmp->tm_mday)) == 0 && 1187 (result = (atmp->tm_hour - btmp->tm_hour)) == 0 && 1188 (result = (atmp->tm_min - btmp->tm_min)) == 0) 1189 result = atmp->tm_sec - btmp->tm_sec; 1190 return result; 1191} 1192 1193static time_t 1194time2(tmp, funcp, offset, okayp) 1195struct tm * const tmp;
| 1237 1238 number0 = *number; 1239 *number += delta; 1240 return (*number < number0) != (delta < 0); 1241} 1242 1243static int 1244normalize_overflow(tensptr, unitsptr, base) 1245int * const tensptr; 1246int * const unitsptr; 1247const int base; 1248{ 1249 register int tensdelta; 1250 1251 tensdelta = (*unitsptr >= 0) ? 1252 (*unitsptr / base) : 1253 (-1 - (-1 - *unitsptr) / base); 1254 *unitsptr -= tensdelta * base; 1255 return increment_overflow(tensptr, tensdelta); 1256} 1257 1258static int 1259tmcomp(atmp, btmp) 1260register const struct tm * const atmp; 1261register const struct tm * const btmp; 1262{ 1263 register int result; 1264 1265 if ((result = (atmp->tm_year - btmp->tm_year)) == 0 && 1266 (result = (atmp->tm_mon - btmp->tm_mon)) == 0 && 1267 (result = (atmp->tm_mday - btmp->tm_mday)) == 0 && 1268 (result = (atmp->tm_hour - btmp->tm_hour)) == 0 && 1269 (result = (atmp->tm_min - btmp->tm_min)) == 0) 1270 result = atmp->tm_sec - btmp->tm_sec; 1271 return result; 1272} 1273 1274static time_t 1275time2(tmp, funcp, offset, okayp) 1276struct tm * const tmp;
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1196void (* const funcp)();
| 1277void (* const funcp) P((const time_t*, long, struct tm*));
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1197const long offset; 1198int * const okayp; 1199{ 1200 register const struct state * sp; 1201 register int dir; 1202 register int bits; 1203 register int i, j ; 1204 register int saved_seconds; 1205 time_t newt; 1206 time_t t; 1207 struct tm yourtm, mytm; 1208 1209 *okayp = FALSE; 1210 yourtm = *tmp; 1211 if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR)) 1212 return WRONG; 1213 if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY)) 1214 return WRONG; 1215 if (normalize_overflow(&yourtm.tm_year, &yourtm.tm_mon, MONSPERYEAR)) 1216 return WRONG; 1217 /* 1218 ** Turn yourtm.tm_year into an actual year number for now. 1219 ** It is converted back to an offset from TM_YEAR_BASE later. 1220 */ 1221 if (increment_overflow(&yourtm.tm_year, TM_YEAR_BASE)) 1222 return WRONG; 1223 while (yourtm.tm_mday <= 0) { 1224 if (increment_overflow(&yourtm.tm_year, -1)) 1225 return WRONG; 1226 yourtm.tm_mday += year_lengths[isleap(yourtm.tm_year)]; 1227 } 1228 while (yourtm.tm_mday > DAYSPERLYEAR) { 1229 yourtm.tm_mday -= year_lengths[isleap(yourtm.tm_year)]; 1230 if (increment_overflow(&yourtm.tm_year, 1)) 1231 return WRONG; 1232 } 1233 for ( ; ; ) { 1234 i = mon_lengths[isleap(yourtm.tm_year)][yourtm.tm_mon]; 1235 if (yourtm.tm_mday <= i) 1236 break; 1237 yourtm.tm_mday -= i; 1238 if (++yourtm.tm_mon >= MONSPERYEAR) { 1239 yourtm.tm_mon = 0; 1240 if (increment_overflow(&yourtm.tm_year, 1)) 1241 return WRONG; 1242 } 1243 } 1244 if (increment_overflow(&yourtm.tm_year, -TM_YEAR_BASE)) 1245 return WRONG; 1246 if (yourtm.tm_year + TM_YEAR_BASE < EPOCH_YEAR) { 1247 /* 1248 ** We can't set tm_sec to 0, because that might push the 1249 ** time below the minimum representable time. 1250 ** Set tm_sec to 59 instead. 1251 ** This assumes that the minimum representable time is 1252 ** not in the same minute that a leap second was deleted from, 1253 ** which is a safer assumption than using 58 would be. 1254 */ 1255 if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN)) 1256 return WRONG; 1257 saved_seconds = yourtm.tm_sec; 1258 yourtm.tm_sec = SECSPERMIN - 1; 1259 } else { 1260 saved_seconds = yourtm.tm_sec; 1261 yourtm.tm_sec = 0; 1262 } 1263 /* 1264 ** Calculate the number of magnitude bits in a time_t 1265 ** (this works regardless of whether time_t is 1266 ** signed or unsigned, though lint complains if unsigned). 1267 */ 1268 for (bits = 0, t = 1; t > 0; ++bits, t <<= 1) 1269 continue; 1270 /* 1271 ** If time_t is signed, then 0 is the median value, 1272 ** if time_t is unsigned, then 1 << bits is median. 1273 */ 1274 t = (t < 0) ? 0 : ((time_t) 1 << bits); 1275 for ( ; ; ) { 1276 (*funcp)(&t, offset, &mytm); 1277 dir = tmcomp(&mytm, &yourtm); 1278 if (dir != 0) { 1279 if (bits-- < 0) 1280 return WRONG; 1281 if (bits < 0) 1282 --t; 1283 else if (dir > 0) 1284 t -= (time_t) 1 << bits; 1285 else t += (time_t) 1 << bits; 1286 continue; 1287 } 1288 if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst) 1289 break; 1290 /* 1291 ** Right time, wrong type. 1292 ** Hunt for right time, right type. 1293 ** It's okay to guess wrong since the guess 1294 ** gets checked. 1295 */ 1296 /* 1297 ** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's. 1298 */ 1299 sp = (const struct state *) 1300 (((void *) funcp == (void *) localsub) ? 1301 lclptr : gmtptr); 1302#ifdef ALL_STATE 1303 if (sp == NULL) 1304 return WRONG; 1305#endif /* defined ALL_STATE */ 1306 for (i = 0; i < sp->typecnt; ++i) { 1307 if (sp->ttis[i].tt_isdst != yourtm.tm_isdst) 1308 continue; 1309 for (j = 0; j < sp->typecnt; ++j) { 1310 if (sp->ttis[j].tt_isdst == yourtm.tm_isdst) 1311 continue; 1312 newt = t + sp->ttis[j].tt_gmtoff - 1313 sp->ttis[i].tt_gmtoff; 1314 (*funcp)(&newt, offset, &mytm); 1315 if (tmcomp(&mytm, &yourtm) != 0) 1316 continue; 1317 if (mytm.tm_isdst != yourtm.tm_isdst) 1318 continue; 1319 /* 1320 ** We have a match. 1321 */ 1322 t = newt; 1323 goto label; 1324 } 1325 } 1326 return WRONG; 1327 } 1328label: 1329 newt = t + saved_seconds; 1330 if ((newt < t) != (saved_seconds < 0)) 1331 return WRONG; 1332 t = newt; 1333 (*funcp)(&t, offset, tmp); 1334 *okayp = TRUE; 1335 return t; 1336} 1337 1338static time_t 1339time1(tmp, funcp, offset) 1340struct tm * const tmp;
| 1278const long offset; 1279int * const okayp; 1280{ 1281 register const struct state * sp; 1282 register int dir; 1283 register int bits; 1284 register int i, j ; 1285 register int saved_seconds; 1286 time_t newt; 1287 time_t t; 1288 struct tm yourtm, mytm; 1289 1290 *okayp = FALSE; 1291 yourtm = *tmp; 1292 if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR)) 1293 return WRONG; 1294 if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY)) 1295 return WRONG; 1296 if (normalize_overflow(&yourtm.tm_year, &yourtm.tm_mon, MONSPERYEAR)) 1297 return WRONG; 1298 /* 1299 ** Turn yourtm.tm_year into an actual year number for now. 1300 ** It is converted back to an offset from TM_YEAR_BASE later. 1301 */ 1302 if (increment_overflow(&yourtm.tm_year, TM_YEAR_BASE)) 1303 return WRONG; 1304 while (yourtm.tm_mday <= 0) { 1305 if (increment_overflow(&yourtm.tm_year, -1)) 1306 return WRONG; 1307 yourtm.tm_mday += year_lengths[isleap(yourtm.tm_year)]; 1308 } 1309 while (yourtm.tm_mday > DAYSPERLYEAR) { 1310 yourtm.tm_mday -= year_lengths[isleap(yourtm.tm_year)]; 1311 if (increment_overflow(&yourtm.tm_year, 1)) 1312 return WRONG; 1313 } 1314 for ( ; ; ) { 1315 i = mon_lengths[isleap(yourtm.tm_year)][yourtm.tm_mon]; 1316 if (yourtm.tm_mday <= i) 1317 break; 1318 yourtm.tm_mday -= i; 1319 if (++yourtm.tm_mon >= MONSPERYEAR) { 1320 yourtm.tm_mon = 0; 1321 if (increment_overflow(&yourtm.tm_year, 1)) 1322 return WRONG; 1323 } 1324 } 1325 if (increment_overflow(&yourtm.tm_year, -TM_YEAR_BASE)) 1326 return WRONG; 1327 if (yourtm.tm_year + TM_YEAR_BASE < EPOCH_YEAR) { 1328 /* 1329 ** We can't set tm_sec to 0, because that might push the 1330 ** time below the minimum representable time. 1331 ** Set tm_sec to 59 instead. 1332 ** This assumes that the minimum representable time is 1333 ** not in the same minute that a leap second was deleted from, 1334 ** which is a safer assumption than using 58 would be. 1335 */ 1336 if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN)) 1337 return WRONG; 1338 saved_seconds = yourtm.tm_sec; 1339 yourtm.tm_sec = SECSPERMIN - 1; 1340 } else { 1341 saved_seconds = yourtm.tm_sec; 1342 yourtm.tm_sec = 0; 1343 } 1344 /* 1345 ** Calculate the number of magnitude bits in a time_t 1346 ** (this works regardless of whether time_t is 1347 ** signed or unsigned, though lint complains if unsigned). 1348 */ 1349 for (bits = 0, t = 1; t > 0; ++bits, t <<= 1) 1350 continue; 1351 /* 1352 ** If time_t is signed, then 0 is the median value, 1353 ** if time_t is unsigned, then 1 << bits is median. 1354 */ 1355 t = (t < 0) ? 0 : ((time_t) 1 << bits); 1356 for ( ; ; ) { 1357 (*funcp)(&t, offset, &mytm); 1358 dir = tmcomp(&mytm, &yourtm); 1359 if (dir != 0) { 1360 if (bits-- < 0) 1361 return WRONG; 1362 if (bits < 0) 1363 --t; 1364 else if (dir > 0) 1365 t -= (time_t) 1 << bits; 1366 else t += (time_t) 1 << bits; 1367 continue; 1368 } 1369 if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst) 1370 break; 1371 /* 1372 ** Right time, wrong type. 1373 ** Hunt for right time, right type. 1374 ** It's okay to guess wrong since the guess 1375 ** gets checked. 1376 */ 1377 /* 1378 ** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's. 1379 */ 1380 sp = (const struct state *) 1381 (((void *) funcp == (void *) localsub) ? 1382 lclptr : gmtptr); 1383#ifdef ALL_STATE 1384 if (sp == NULL) 1385 return WRONG; 1386#endif /* defined ALL_STATE */ 1387 for (i = 0; i < sp->typecnt; ++i) { 1388 if (sp->ttis[i].tt_isdst != yourtm.tm_isdst) 1389 continue; 1390 for (j = 0; j < sp->typecnt; ++j) { 1391 if (sp->ttis[j].tt_isdst == yourtm.tm_isdst) 1392 continue; 1393 newt = t + sp->ttis[j].tt_gmtoff - 1394 sp->ttis[i].tt_gmtoff; 1395 (*funcp)(&newt, offset, &mytm); 1396 if (tmcomp(&mytm, &yourtm) != 0) 1397 continue; 1398 if (mytm.tm_isdst != yourtm.tm_isdst) 1399 continue; 1400 /* 1401 ** We have a match. 1402 */ 1403 t = newt; 1404 goto label; 1405 } 1406 } 1407 return WRONG; 1408 } 1409label: 1410 newt = t + saved_seconds; 1411 if ((newt < t) != (saved_seconds < 0)) 1412 return WRONG; 1413 t = newt; 1414 (*funcp)(&t, offset, tmp); 1415 *okayp = TRUE; 1416 return t; 1417} 1418 1419static time_t 1420time1(tmp, funcp, offset) 1421struct tm * const tmp;
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1341void (* const funcp)();
| 1422void (* const funcp) P((const time_t*, long, struct tm*));
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1342const long offset; 1343{ 1344 register time_t t; 1345 register const struct state * sp; 1346 register int samei, otheri; 1347 int okay; 1348 1349 if (tmp->tm_isdst > 1) 1350 tmp->tm_isdst = 1; 1351 t = time2(tmp, funcp, offset, &okay); 1352#ifdef PCTS 1353 /* 1354 ** PCTS code courtesy Grant Sullivan (grant@osf.org). 1355 */ 1356 if (okay) 1357 return t; 1358 if (tmp->tm_isdst < 0) 1359 tmp->tm_isdst = 0; /* reset to std and try again */ 1360#endif /* defined PCTS */ 1361#ifndef PCTS 1362 if (okay || tmp->tm_isdst < 0) 1363 return t; 1364#endif /* !defined PCTS */ 1365 /* 1366 ** We're supposed to assume that somebody took a time of one type 1367 ** and did some math on it that yielded a "struct tm" that's bad. 1368 ** We try to divine the type they started from and adjust to the 1369 ** type they need. 1370 */ 1371 /* 1372 ** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's. 1373 */ 1374 sp = (const struct state *) (((void *) funcp == (void *) localsub) ? 1375 lclptr : gmtptr); 1376#ifdef ALL_STATE 1377 if (sp == NULL) 1378 return WRONG; 1379#endif /* defined ALL_STATE */ 1380 for (samei = 0; samei < sp->typecnt; ++samei) { 1381 if (sp->ttis[samei].tt_isdst != tmp->tm_isdst) 1382 continue; 1383 for (otheri = 0; otheri < sp->typecnt; ++otheri) { 1384 if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst) 1385 continue; 1386 tmp->tm_sec += sp->ttis[otheri].tt_gmtoff - 1387 sp->ttis[samei].tt_gmtoff; 1388 tmp->tm_isdst = !tmp->tm_isdst; 1389 t = time2(tmp, funcp, offset, &okay); 1390 if (okay) 1391 return t; 1392 tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff - 1393 sp->ttis[samei].tt_gmtoff; 1394 tmp->tm_isdst = !tmp->tm_isdst; 1395 } 1396 } 1397 return WRONG; 1398} 1399 1400time_t 1401mktime(tmp) 1402struct tm * const tmp; 1403{
| 1423const long offset; 1424{ 1425 register time_t t; 1426 register const struct state * sp; 1427 register int samei, otheri; 1428 int okay; 1429 1430 if (tmp->tm_isdst > 1) 1431 tmp->tm_isdst = 1; 1432 t = time2(tmp, funcp, offset, &okay); 1433#ifdef PCTS 1434 /* 1435 ** PCTS code courtesy Grant Sullivan (grant@osf.org). 1436 */ 1437 if (okay) 1438 return t; 1439 if (tmp->tm_isdst < 0) 1440 tmp->tm_isdst = 0; /* reset to std and try again */ 1441#endif /* defined PCTS */ 1442#ifndef PCTS 1443 if (okay || tmp->tm_isdst < 0) 1444 return t; 1445#endif /* !defined PCTS */ 1446 /* 1447 ** We're supposed to assume that somebody took a time of one type 1448 ** and did some math on it that yielded a "struct tm" that's bad. 1449 ** We try to divine the type they started from and adjust to the 1450 ** type they need. 1451 */ 1452 /* 1453 ** The (void *) casts are the benefit of SunOS 3.3 on Sun 2's. 1454 */ 1455 sp = (const struct state *) (((void *) funcp == (void *) localsub) ? 1456 lclptr : gmtptr); 1457#ifdef ALL_STATE 1458 if (sp == NULL) 1459 return WRONG; 1460#endif /* defined ALL_STATE */ 1461 for (samei = 0; samei < sp->typecnt; ++samei) { 1462 if (sp->ttis[samei].tt_isdst != tmp->tm_isdst) 1463 continue; 1464 for (otheri = 0; otheri < sp->typecnt; ++otheri) { 1465 if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst) 1466 continue; 1467 tmp->tm_sec += sp->ttis[otheri].tt_gmtoff - 1468 sp->ttis[samei].tt_gmtoff; 1469 tmp->tm_isdst = !tmp->tm_isdst; 1470 t = time2(tmp, funcp, offset, &okay); 1471 if (okay) 1472 return t; 1473 tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff - 1474 sp->ttis[samei].tt_gmtoff; 1475 tmp->tm_isdst = !tmp->tm_isdst; 1476 } 1477 } 1478 return WRONG; 1479} 1480 1481time_t 1482mktime(tmp) 1483struct tm * const tmp; 1484{
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| 1485 tzset();
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1404 return time1(tmp, localsub, 0L); 1405} 1406 1407#ifdef STD_INSPIRED 1408 1409time_t 1410timelocal(tmp) 1411struct tm * const tmp; 1412{ 1413 tmp->tm_isdst = -1; /* in case it wasn't initialized */ 1414 return mktime(tmp); 1415} 1416 1417time_t 1418timegm(tmp) 1419struct tm * const tmp; 1420{ 1421 tmp->tm_isdst = 0; 1422 return time1(tmp, gmtsub, 0L); 1423} 1424 1425time_t 1426timeoff(tmp, offset) 1427struct tm * const tmp; 1428const long offset; 1429{ 1430 tmp->tm_isdst = 0; 1431 return time1(tmp, gmtsub, offset); 1432} 1433 1434#endif /* defined STD_INSPIRED */ 1435 1436#ifdef CMUCS 1437 1438/* 1439** The following is supplied for compatibility with 1440** previous versions of the CMUCS runtime library. 1441*/ 1442 1443long 1444gtime(tmp) 1445struct tm * const tmp; 1446{ 1447 const time_t t = mktime(tmp); 1448 1449 if (t == WRONG) 1450 return -1; 1451 return t; 1452} 1453 1454#endif /* defined CMUCS */ 1455 1456/* 1457** XXX--is the below the right way to conditionalize?? 1458*/ 1459 1460#ifdef STD_INSPIRED 1461 1462/* 1463** IEEE Std 1003.1-1988 (POSIX) legislates that 536457599 1464** shall correspond to "Wed Dec 31 23:59:59 GMT 1986", which 1465** is not the case if we are accounting for leap seconds. 1466** So, we provide the following conversion routines for use 1467** when exchanging timestamps with POSIX conforming systems. 1468*/ 1469 1470static long 1471leapcorr(timep) 1472time_t * timep; 1473{ 1474 register struct state * sp; 1475 register struct lsinfo * lp; 1476 register int i; 1477
| 1486 return time1(tmp, localsub, 0L); 1487} 1488 1489#ifdef STD_INSPIRED 1490 1491time_t 1492timelocal(tmp) 1493struct tm * const tmp; 1494{ 1495 tmp->tm_isdst = -1; /* in case it wasn't initialized */ 1496 return mktime(tmp); 1497} 1498 1499time_t 1500timegm(tmp) 1501struct tm * const tmp; 1502{ 1503 tmp->tm_isdst = 0; 1504 return time1(tmp, gmtsub, 0L); 1505} 1506 1507time_t 1508timeoff(tmp, offset) 1509struct tm * const tmp; 1510const long offset; 1511{ 1512 tmp->tm_isdst = 0; 1513 return time1(tmp, gmtsub, offset); 1514} 1515 1516#endif /* defined STD_INSPIRED */ 1517 1518#ifdef CMUCS 1519 1520/* 1521** The following is supplied for compatibility with 1522** previous versions of the CMUCS runtime library. 1523*/ 1524 1525long 1526gtime(tmp) 1527struct tm * const tmp; 1528{ 1529 const time_t t = mktime(tmp); 1530 1531 if (t == WRONG) 1532 return -1; 1533 return t; 1534} 1535 1536#endif /* defined CMUCS */ 1537 1538/* 1539** XXX--is the below the right way to conditionalize?? 1540*/ 1541 1542#ifdef STD_INSPIRED 1543 1544/* 1545** IEEE Std 1003.1-1988 (POSIX) legislates that 536457599 1546** shall correspond to "Wed Dec 31 23:59:59 GMT 1986", which 1547** is not the case if we are accounting for leap seconds. 1548** So, we provide the following conversion routines for use 1549** when exchanging timestamps with POSIX conforming systems. 1550*/ 1551 1552static long 1553leapcorr(timep) 1554time_t * timep; 1555{ 1556 register struct state * sp; 1557 register struct lsinfo * lp; 1558 register int i; 1559
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1478 if (!lcl_is_set) 1479 (void) tzset();
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1480 sp = lclptr; 1481 i = sp->leapcnt; 1482 while (--i >= 0) { 1483 lp = &sp->lsis[i]; 1484 if (*timep >= lp->ls_trans) 1485 return lp->ls_corr; 1486 } 1487 return 0; 1488} 1489 1490time_t 1491time2posix(t) 1492time_t t; 1493{
| 1560 sp = lclptr; 1561 i = sp->leapcnt; 1562 while (--i >= 0) { 1563 lp = &sp->lsis[i]; 1564 if (*timep >= lp->ls_trans) 1565 return lp->ls_corr; 1566 } 1567 return 0; 1568} 1569 1570time_t 1571time2posix(t) 1572time_t t; 1573{
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| 1574 tzset();
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1494 return t - leapcorr(&t); 1495} 1496 1497time_t 1498posix2time(t) 1499time_t t; 1500{ 1501 time_t x; 1502 time_t y; 1503
| 1575 return t - leapcorr(&t); 1576} 1577 1578time_t 1579posix2time(t) 1580time_t t; 1581{ 1582 time_t x; 1583 time_t y; 1584
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| 1585 tzset();
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1504 /* 1505 ** For a positive leap second hit, the result 1506 ** is not unique. For a negative leap second 1507 ** hit, the corresponding time doesn't exist, 1508 ** so we return an adjacent second. 1509 */ 1510 x = t + leapcorr(&t); 1511 y = x - leapcorr(&x); 1512 if (y < t) { 1513 do { 1514 x++; 1515 y = x - leapcorr(&x); 1516 } while (y < t); 1517 if (t != y) 1518 return x - 1; 1519 } else if (y > t) { 1520 do { 1521 --x; 1522 y = x - leapcorr(&x); 1523 } while (y > t); 1524 if (t != y) 1525 return x + 1; 1526 } 1527 return x; 1528} 1529 1530#endif /* defined STD_INSPIRED */
| 1586 /* 1587 ** For a positive leap second hit, the result 1588 ** is not unique. For a negative leap second 1589 ** hit, the corresponding time doesn't exist, 1590 ** so we return an adjacent second. 1591 */ 1592 x = t + leapcorr(&t); 1593 y = x - leapcorr(&x); 1594 if (y < t) { 1595 do { 1596 x++; 1597 y = x - leapcorr(&x); 1598 } while (y < t); 1599 if (t != y) 1600 return x - 1; 1601 } else if (y > t) { 1602 do { 1603 --x; 1604 y = x - leapcorr(&x); 1605 } while (y > t); 1606 if (t != y) 1607 return x + 1; 1608 } 1609 return x; 1610} 1611 1612#endif /* defined STD_INSPIRED */
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