diff options
Diffstat (limited to 'time/tzfile.c')
| -rw-r--r-- | time/tzfile.c | 113 |
1 files changed, 63 insertions, 50 deletions
diff --git a/time/tzfile.c b/time/tzfile.c index e334249e77..d80789d570 100644 --- a/time/tzfile.c +++ b/time/tzfile.c @@ -1,22 +1,21 @@ /* Copyright (C) 1991, 92, 93, 95, 96 Free Software Foundation, Inc. -This file is part of the GNU C Library. + This file is part of the GNU C Library. -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ -#include <ansidecl.h> #include <stdlib.h> #include <stdio.h> #include <time.h> @@ -43,7 +42,8 @@ struct leap long int change; /* Seconds of correction to apply. */ }; -static void compute_tzname_max __P ((size_t)); +static struct ttinfo *find_transition (time_t timer); +static void compute_tzname_max (size_t); static size_t num_transitions; static time_t *transitions = NULL; @@ -77,30 +77,31 @@ decode (const void *ptr) } void -DEFUN(__tzfile_read, (file), CONST char *file) +__tzfile_read (const char *file) { size_t num_isstd, num_isgmt; register FILE *f; struct tzhead tzhead; size_t chars; register size_t i; + struct ttinfo *info; __use_tzfile = 0; if (transitions != NULL) - free((PTR) transitions); + free ((void *) transitions); transitions = NULL; if (type_idxs != NULL) - free((PTR) type_idxs); + free ((void *) type_idxs); type_idxs = NULL; if (types != NULL) - free((PTR) types); + free ((void *) types); types = NULL; if (zone_names != NULL) - free((PTR) zone_names); + free ((void *) zone_names); zone_names = NULL; if (leaps != NULL) - free((PTR) leaps); + free ((void *) leaps); leaps = NULL; if (file == NULL) @@ -112,12 +113,12 @@ DEFUN(__tzfile_read, (file), CONST char *file) if (*file != '/') { - static CONST char tzdir[] = TZDIR; - register CONST unsigned int len = strlen(file) + 1; - char *new = (char *) __alloca(sizeof(tzdir) + len); - memcpy(new, tzdir, sizeof(tzdir) - 1); - new[sizeof(tzdir) - 1] = '/'; - memcpy(&new[sizeof(tzdir)], file, len); + static const char tzdir[] = TZDIR; + register const unsigned int len = strlen (file) + 1; + char *new = (char *) __alloca (sizeof (tzdir) + len); + memcpy (new, tzdir, sizeof(tzdir) - 1); + new[sizeof (tzdir) - 1] = '/'; + memcpy (&new[sizeof (tzdir)], file, len); file = new; } @@ -125,7 +126,7 @@ DEFUN(__tzfile_read, (file), CONST char *file) if (f == NULL) return; - if (fread((PTR) &tzhead, sizeof(tzhead), 1, f) != 1) + if (fread ((void *) &tzhead, sizeof (tzhead), 1, f) != 1) goto lose; num_transitions = (size_t) decode (tzhead.tzh_timecnt); @@ -166,8 +167,8 @@ DEFUN(__tzfile_read, (file), CONST char *file) if (sizeof (time_t) < 4) abort (); - if (fread((PTR) transitions, 4, num_transitions, f) != num_transitions || - fread((PTR) type_idxs, 1, num_transitions, f) != num_transitions) + if (fread(transitions, 4, num_transitions, f) != num_transitions || + fread(type_idxs, 1, num_transitions, f) != num_transitions) goto lose; if (BYTE_ORDER != BIG_ENDIAN || sizeof (time_t) != 4) @@ -184,30 +185,30 @@ DEFUN(__tzfile_read, (file), CONST char *file) for (i = 0; i < num_types; ++i) { unsigned char x[4]; - if (fread((PTR) x, 1, 4, f) != 4 || - fread((PTR) &types[i].isdst, 1, 1, f) != 1 || - fread((PTR) &types[i].idx, 1, 1, f) != 1) + if (fread (x, 1, 4, f) != 4 || + fread (&types[i].isdst, 1, 1, f) != 1 || + fread (&types[i].idx, 1, 1, f) != 1) goto lose; types[i].offset = (long int) decode (x); } - if (fread((PTR) zone_names, 1, chars, f) != chars) + if (fread (zone_names, 1, chars, f) != chars) goto lose; for (i = 0; i < num_leaps; ++i) { unsigned char x[4]; - if (fread((PTR) x, 1, sizeof(x), f) != sizeof(x)) + if (fread (x, 1, sizeof (x), f) != sizeof (x)) goto lose; leaps[i].transition = (time_t) decode (x); - if (fread((PTR) x, 1, sizeof(x), f) != sizeof(x)) + if (fread (x, 1, sizeof (x), f) != sizeof (x)) goto lose; leaps[i].change = (long int) decode (x); } for (i = 0; i < num_isstd; ++i) { - char c = getc(f); + char c = getc (f); if (c == EOF) goto lose; types[i].isstd = c != 0; @@ -217,7 +218,7 @@ DEFUN(__tzfile_read, (file), CONST char *file) for (i = 0; i < num_isgmt; ++i) { - char c = getc(f); + char c = getc (f); if (c == EOF) goto lose; types[i].isgmt = c != 0; @@ -225,7 +226,14 @@ DEFUN(__tzfile_read, (file), CONST char *file) while (i < num_types) types[i++].isgmt = 0; - (void) fclose(f); + fclose (f); + + info = find_transition (0); + for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); + ++i) + __tzname[types[i].isdst] = &zone_names[types[i].idx]; + if (info->isdst < sizeof (__tzname) / sizeof (__tzname[0])) + __tzname[info->isdst] = &zone_names[info->idx]; compute_tzname_max (chars); @@ -233,7 +241,7 @@ DEFUN(__tzfile_read, (file), CONST char *file) return; lose:; - (void) fclose(f); + fclose(f); } /* The user specified a hand-made timezone, but not its DST rules. @@ -241,9 +249,7 @@ DEFUN(__tzfile_read, (file), CONST char *file) from the TZDEFRULES file. */ void -DEFUN(__tzfile_default, (std, dst, stdoff, dstoff), - char *std AND char *dst AND - long int stdoff AND long int dstoff) +__tzfile_default (char *std, char *dst, long int stdoff, long int dstoff) { size_t stdlen, dstlen, i; long int rule_offset, rule_stdoff, rule_dstoff; @@ -332,12 +338,10 @@ DEFUN(__tzfile_default, (std, dst, stdoff, dstoff), compute_tzname_max (stdlen + dstlen); } -int -DEFUN(__tzfile_compute, (timer, leap_correct, leap_hit), - time_t timer AND long int *leap_correct AND int *leap_hit) +static struct ttinfo * +find_transition (time_t timer) { - struct ttinfo *info; - register size_t i; + size_t i; if (num_transitions == 0 || timer < transitions[0]) { @@ -360,7 +364,16 @@ DEFUN(__tzfile_compute, (timer, leap_correct, leap_hit), i = type_idxs[i - 1]; } - info = &types[i]; + return &types[i]; +} + +int +__tzfile_compute (time_t timer, long int *leap_correct, int *leap_hit) +{ + struct ttinfo *info; + register size_t i; + + info = find_transition (timer); __daylight = info->isdst; __timezone = info->offset; for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); @@ -400,7 +413,7 @@ DEFUN(__tzfile_compute, (timer, leap_correct, leap_hit), } void -DEFUN(compute_tzname_max, (chars), size_t chars) +compute_tzname_max (size_t chars) { extern size_t __tzname_cur_max; /* Defined in __tzset.c. */ |