/* Replacements for routines missing on some systems.
- Copyright (C) 1995-2005 Free Software Foundation, Inc.
+ Copyright (C) 1996-2006 Free Software Foundation, Inc.
This file is part of GNU Wget.
GNU Wget is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
GNU Wget is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with Wget; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+along with Wget. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <time.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#include "wget.h"
/* Some systems lack certain functions normally taken for granted.
- For example, Windows doesn't have strptime, and some systems lack
- strcasecmp and strncasecmp. This file should contain fallback
- implementations of the missing functions. It should *not* define
- new Wget-specific functions -- those should placed in utils.c or
- elsewhere. */
+ For example, Windows doesn't have strptime, and some systems don't
+ have a usable fnmatch. This file should contain fallback
+ implementations of such missing functions. It should *not* define
+ new Wget-specific interfaces -- those should be placed in utils.c
+ or elsewhere. */
\f
/* strcasecmp and strncasecmp apparently originated with BSD 4.4.
SUSv3 seems to be the only standard out there (that I can find)
- that requires their existence, so there are systems that lack them
- still in use. Note that these don't get defined under Windows
- because mswindows.h defines them to the equivalent Windows
- functions stricmp and strnicmp. */
+ that requires their existence, so in theory there might be systems
+ still in use that lack them. Note that these don't get defined
+ under Windows because mswindows.h defines them to the equivalent
+ Windows functions stricmp and strnicmp. */
#ifndef HAVE_STRCASECMP
/* From GNU libc. */
return c1 - c2;
}
#endif /* not HAVE_STRNCASECMP */
-\f
-/* strpbrk is a BSD 4.3 function mandated by POSIX and C99 and present
- on Windows. It might be missing from older Unixes of non-BSD
- ancestry or possibly from non-Unix systems Wget gets ported to, so
- we add it here. */
-
-#ifndef HAVE_STRPBRK
-/* Find the first ocurrence in S of any character in ACCEPT. */
-char *
-strpbrk (const char *s, const char *accept)
-{
- while (*s != '\0')
- {
- const char *a = accept;
- while (*a != '\0')
- if (*a++ == *s)
- return (char *) s;
- ++s;
- }
-
- return 0;
-}
-#endif /* HAVE_STRPBRK */
-\f
-/* mktime is a BSD 4.3 function also required by POSIX and C99. I
- don't know if there is a widely used system that lacks it, so it
- might be a candidate for removal. */
-
-#ifndef HAVE_MKTIME
-/* From GNU libc 2.0. */
-
-/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Paul Eggert (eggert@twinsun.com). */
-
-#ifdef _LIBC
-# define HAVE_LIMITS_H 1
-# define HAVE_LOCALTIME_R 1
-# define STDC_HEADERS 1
-#endif
-
-/* Assume that leap seconds are possible, unless told otherwise.
- If the host has a `zic' command with a `-L leapsecondfilename' option,
- then it supports leap seconds; otherwise it probably doesn't. */
-#ifndef LEAP_SECONDS_POSSIBLE
-# define LEAP_SECONDS_POSSIBLE 1
-#endif
-
-#ifndef __P
-# define __P(args) args
-#endif /* Not __P. */
-
-#ifndef CHAR_BIT
-# define CHAR_BIT 8
-#endif
-
-#ifndef INT_MIN
-# define INT_MIN (~0 << (sizeof (int) * CHAR_BIT - 1))
-#endif
-#ifndef INT_MAX
-# define INT_MAX (~0 - INT_MIN)
-#endif
-
-#ifndef TIME_T_MIN
-/* The outer cast to time_t works around a bug in Cray C 5.0.3.0. */
-# define TIME_T_MIN ((time_t) \
- (0 < (time_t) -1 ? (time_t) 0 \
- : ~ (time_t) 0 << (sizeof (time_t) * CHAR_BIT - 1)))
-#endif
-#ifndef TIME_T_MAX
-# define TIME_T_MAX (~ (time_t) 0 - TIME_T_MIN)
-#endif
-
-#define TM_YEAR_BASE 1900
-#define EPOCH_YEAR 1970
-
-#ifndef __isleap
-/* Nonzero if YEAR is a leap year (every 4 years,
- except every 100th isn't, and every 400th is). */
-# define __isleap(year) \
- ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
-#endif
-
-/* How many days come before each month (0-12). */
-/* __mon_yday[][] is common to mktime and strptime implementations.
- --abbotti */
-const unsigned short int __mon_yday[2][13];
-#ifndef NEED_MON_YDAY
-# define NEED_MON_YDAY
-#endif
-static time_t ydhms_tm_diff __P ((int, int, int, int, int, const struct tm *));
-time_t __mktime_internal __P ((struct tm *,
- struct tm *(*) (const time_t *, struct tm *),
- time_t *));
+#ifndef HAVE_MEMRCHR
+/* memrchr is a GNU extension. It is like the memchr function, except
+ that it searches backwards from the end of the n bytes pointed to
+ by s instead of forwards from the front. */
-
-#ifdef _LIBC
-# define localtime_r __localtime_r
-#else
-# if ! HAVE_LOCALTIME_R && ! defined localtime_r
-/* Approximate localtime_r as best we can in its absence. */
-# define localtime_r my_mktime_localtime_r
-static struct tm *localtime_r __P ((const time_t *, struct tm *));
-static struct tm *
-localtime_r (t, tp)
- const time_t *t;
- struct tm *tp;
-{
- struct tm *l = localtime (t);
- if (! l)
- return 0;
- *tp = *l;
- return tp;
-}
-# endif /* ! HAVE_LOCALTIME_R && ! defined (localtime_r) */
-#endif /* ! _LIBC */
-
-
-/* Yield the difference between (YEAR-YDAY HOUR:MIN:SEC) and (*TP),
- measured in seconds, ignoring leap seconds.
- YEAR uses the same numbering as TM->tm_year.
- All values are in range, except possibly YEAR.
- If overflow occurs, yield the low order bits of the correct answer. */
-static time_t
-ydhms_tm_diff (year, yday, hour, min, sec, tp)
- int year, yday, hour, min, sec;
- const struct tm *tp;
-{
- /* Compute intervening leap days correctly even if year is negative.
- Take care to avoid int overflow. time_t overflow is OK, since
- only the low order bits of the correct time_t answer are needed.
- Don't convert to time_t until after all divisions are done, since
- time_t might be unsigned. */
- int a4 = (year >> 2) + (TM_YEAR_BASE >> 2) - ! (year & 3);
- int b4 = (tp->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (tp->tm_year & 3);
- int a100 = a4 / 25 - (a4 % 25 < 0);
- int b100 = b4 / 25 - (b4 % 25 < 0);
- int a400 = a100 >> 2;
- int b400 = b100 >> 2;
- int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
- time_t years = year - (time_t) tp->tm_year;
- time_t days = (365 * years + intervening_leap_days
- + (yday - tp->tm_yday));
- return (60 * (60 * (24 * days + (hour - tp->tm_hour))
- + (min - tp->tm_min))
- + (sec - tp->tm_sec));
-}
-
-
-static time_t localtime_offset;
-
-/* Convert *TP to a time_t value. */
-time_t
-mktime (tp)
- struct tm *tp;
+void *
+memrchr (const void *s, int c, size_t n)
{
-#ifdef _LIBC
- /* POSIX.1 8.1.1 requires that whenever mktime() is called, the
- time zone names contained in the external variable `tzname' shall
- be set as if the tzset() function had been called. */
- __tzset ();
-#endif
-
- return __mktime_internal (tp, localtime_r, &localtime_offset);
+ const char *b = s;
+ const char *e = b + n;
+ while (e > b)
+ if (*--e == c)
+ return (void *) e;
+ return NULL;
}
-
-/* Convert *TP to a time_t value, inverting
- the monotonic and mostly-unit-linear conversion function CONVERT.
- Use *OFFSET to keep track of a guess at the offset of the result,
- compared to what the result would be for UTC without leap seconds.
- If *OFFSET's guess is correct, only one CONVERT call is needed. */
-time_t
-__mktime_internal (tp, convert, offset)
- struct tm *tp;
- struct tm *(*convert) __P ((const time_t *, struct tm *));
- time_t *offset;
-{
- time_t t, dt, t0;
- struct tm tm;
-
- /* The maximum number of probes (calls to CONVERT) should be enough
- to handle any combinations of time zone rule changes, solar time,
- and leap seconds. Posix.1 prohibits leap seconds, but some hosts
- have them anyway. */
- int remaining_probes = 4;
-
- /* Time requested. Copy it in case CONVERT modifies *TP; this can
- occur if TP is localtime's returned value and CONVERT is localtime. */
- int sec = tp->tm_sec;
- int min = tp->tm_min;
- int hour = tp->tm_hour;
- int mday = tp->tm_mday;
- int mon = tp->tm_mon;
- int year_requested = tp->tm_year;
- int isdst = tp->tm_isdst;
-
- /* Ensure that mon is in range, and set year accordingly. */
- int mon_remainder = mon % 12;
- int negative_mon_remainder = mon_remainder < 0;
- int mon_years = mon / 12 - negative_mon_remainder;
- int year = year_requested + mon_years;
-
- /* The other values need not be in range:
- the remaining code handles minor overflows correctly,
- assuming int and time_t arithmetic wraps around.
- Major overflows are caught at the end. */
-
- /* Calculate day of year from year, month, and day of month.
- The result need not be in range. */
- int yday = ((__mon_yday[__isleap (year + TM_YEAR_BASE)]
- [mon_remainder + 12 * negative_mon_remainder])
- + mday - 1);
-
- int sec_requested = sec;
-#if LEAP_SECONDS_POSSIBLE
- /* Handle out-of-range seconds specially,
- since ydhms_tm_diff assumes every minute has 60 seconds. */
- if (sec < 0)
- sec = 0;
- if (59 < sec)
- sec = 59;
#endif
-
- /* Invert CONVERT by probing. First assume the same offset as last time.
- Then repeatedly use the error to improve the guess. */
-
- tm.tm_year = EPOCH_YEAR - TM_YEAR_BASE;
- tm.tm_yday = tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
- t0 = ydhms_tm_diff (year, yday, hour, min, sec, &tm);
-
- for (t = t0 + *offset;
- (dt = ydhms_tm_diff (year, yday, hour, min, sec, (*convert) (&t, &tm)));
- t += dt)
- if (--remaining_probes == 0)
- return -1;
-
- /* Check whether tm.tm_isdst has the requested value, if any. */
- if (0 <= isdst && 0 <= tm.tm_isdst)
- {
- int dst_diff = (isdst != 0) - (tm.tm_isdst != 0);
- if (dst_diff)
- {
- /* Move two hours in the direction indicated by the disagreement,
- probe some more, and switch to a new time if found.
- The largest known fallback due to daylight savings is two hours:
- once, in Newfoundland, 1988-10-30 02:00 -> 00:00. */
- time_t ot = t - 2 * 60 * 60 * dst_diff;
- while (--remaining_probes != 0)
- {
- struct tm otm;
- if (! (dt = ydhms_tm_diff (year, yday, hour, min, sec,
- (*convert) (&ot, &otm))))
- {
- t = ot;
- tm = otm;
- break;
- }
- if ((ot += dt) == t)
- break; /* Avoid a redundant probe. */
- }
- }
- }
-
- *offset = t - t0;
-
-#if LEAP_SECONDS_POSSIBLE
- if (sec_requested != tm.tm_sec)
- {
- /* Adjust time to reflect the tm_sec requested, not the normalized value.
- Also, repair any damage from a false match due to a leap second. */
- t += sec_requested - sec + (sec == 0 && tm.tm_sec == 60);
- (*convert) (&t, &tm);
- }
-#endif
-
- if (TIME_T_MAX / INT_MAX / 366 / 24 / 60 / 60 < 3)
- {
- /* time_t isn't large enough to rule out overflows in ydhms_tm_diff,
- so check for major overflows. A gross check suffices,
- since if t has overflowed, it is off by a multiple of
- TIME_T_MAX - TIME_T_MIN + 1. So ignore any component of
- the difference that is bounded by a small value. */
-
- double dyear = (double) year_requested + mon_years - tm.tm_year;
- double dday = 366 * dyear + mday;
- double dsec = 60 * (60 * (24 * dday + hour) + min) + sec_requested;
-
- if (TIME_T_MAX / 3 - TIME_T_MIN / 3 < (dsec < 0 ? - dsec : dsec))
- return -1;
- }
-
- *tp = tm;
- return t;
-}
-
-#ifdef weak_alias
-weak_alias (mktime, timelocal)
-#endif
-#endif /* not HAVE_MKTIME */
\f
/* strptime is required by POSIX, but it is missing from Windows,
which means we must keep a fallback implementation. It is
- reportedly missing or broken on many older systems as well. */
+ reportedly missing or broken on many older Unix systems as well, so
+ it's good to have around. */
#ifndef HAVE_STRPTIME
/* From GNU libc 2.1.3. */
# define HERE_T_FMT_AMPM "%I:%M:%S %p"
# define HERE_T_FMT "%H:%M:%S"
-/* __mon_yday[][] is common to mktime and strptime implementations.
- --abbotti */
const unsigned short int __mon_yday[2][13];
# ifndef NEED_MON_YDAY
# define NEED_MON_YDAY
}
#endif
if (!match_string (HERE_AM_STR, rp))
- if (match_string (HERE_PM_STR, rp))
- is_pm = 1;
- else
- return NULL;
+ {
+ if (match_string (HERE_PM_STR, rp))
+ is_pm = 1;
+ else
+ return NULL;
+ }
break;
case 'r':
#ifdef _NL_CURRENT
#endif /* not HAVE_STRPTIME */
#ifdef NEED_MON_YDAY
-/* __mon_yday[][] is common to mktime and strptime implementations.
- --abbotti */
const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
and given a prefix, but many systems out there are still (as of
this writing in 2005) broken and we must cater to them.
- Additionally, according to anecdotal evidence and conventional
- wisdom I lack courage to challenge, many implementations of fnmatch
- are notoriously buggy and unreliable. So we use our version by
- default, except when compiling under systems where fnmatch is known
- to work (currently on GNU libc-based systems and Solaris.) */
+ Additionally, according to some conventional wisdom, many
+ historical implementations of fnmatch are buggy and unreliable. If
+ yours is such, undefine SYSTEM_FNMATCH in sysdep.h and tell us
+ about it. */
#ifndef SYSTEM_FNMATCH
{
register const char *np;
- for (np = p; np && *np && *np != ']'; np++);
+ for (np = p; np && *np && *np != ']'; np++)
+ ;
if (np && !*np)
{
}
#endif /* not SYSTEM_FNMATCH */
+\f
+#ifndef HAVE_TIMEGM
+/* timegm is a GNU extension, but lately also available on *BSD
+ systems and possibly elsewhere. */
+
+/* True if YEAR is a leap year. */
+#define ISLEAP(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+
+/* Number of leap years in the range [y1, y2). */
+#define LEAPYEARS(y1, y2) \
+ ((y2-1)/4 - (y1-1)/4) - ((y2-1)/100 - (y1-1)/100) + ((y2-1)/400 - (y1-1)/400)
+
+/* Inverse of gmtime: converts struct tm to time_t, assuming the data
+ in tm is UTC rather than local timezone. This implementation
+ returns the number of seconds elapsed since midnight 1970-01-01,
+ converted to time_t. */
+
+time_t
+timegm (struct tm *t)
+{
+ static const unsigned short int month_to_days[][13] = {
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }, /* normal */
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 } /* leap */
+ };
+ const int year = 1900 + t->tm_year;
+ unsigned long secs; /* until 2106-02-07 for 32-bit unsigned long */
+ int days;
+
+ if (year < 1970)
+ return (time_t) -1;
+
+ days = 365 * (year - 1970);
+ /* Take into account leap years between 1970 and YEAR, not counting
+ YEAR itself. */
+ days += LEAPYEARS (1970, year);
+ if (t->tm_mon < 0 || t->tm_mon >= 12)
+ return (time_t) -1;
+ days += month_to_days[ISLEAP (year)][t->tm_mon];
+ days += t->tm_mday - 1;
+
+ secs = days * 86400 + t->tm_hour * 3600 + t->tm_min * 60 + t->tm_sec;
+ return (time_t) secs;
+}
+#endif /* HAVE_TIMEGM */
+
+#ifdef NEED_STRTOLL
+/* strtoll is required by C99 and used by Wget only on systems with
+ LFS. Unfortunately, some systems have LFS, but no strtoll or
+ equivalent. These include HPUX 11.0 and Windows.
+
+ We use #ifdef NEED_STRTOLL instead of #ifndef HAVE_STRTOLL because
+ of the systems which have a suitable replacement (e.g. _strtoi64 on
+ Windows), on which Wget's str_to_wgint is instructed to use that
+ instead. */
+
+static inline int
+char_value (char c, int base)
+{
+ int value;
+ if (c < '0')
+ return -1;
+ if ('0' <= c && c <= '9')
+ value = c - '0';
+ else if ('a' <= c && c <= 'z')
+ value = c - 'a' + 10;
+ else if ('A' <= c && c <= 'Z')
+ value = c - 'A' + 10;
+ else
+ return -1;
+ if (value >= base)
+ return -1;
+ return value;
+}
+
+#define STRTOLL_MAX TYPE_MAXIMUM (strtoll_type)
+/* This definition assumes two's complement arithmetic */
+#define STRTOLL_MIN (-STRTOLL_MAX - 1)
+
+/* Like a%b, but always returns a positive number when A is negative.
+ (C doesn't guarantee the sign of the result.) */
+#define MOD(a, b) ((strtoll_type) -1 % 2 == 1 ? (a) % (b) : - ((a) % (b)))
+
+/* A strtoll-like replacement for systems that have an integral type
+ larger than long but don't supply strtoll. This implementation
+ makes no assumptions about the size of strtoll_type. */
+
+strtoll_type
+strtoll (const char *nptr, char **endptr, int base)
+{
+ strtoll_type result = 0;
+ bool negative;
+
+ if (base != 0 && (base < 2 || base > 36))
+ {
+ errno = EINVAL;
+ return 0;
+ }
+
+ while (*nptr == ' ' || *nptr == '\t')
+ ++nptr;
+ if (*nptr == '-')
+ {
+ negative = true;
+ ++nptr;
+ }
+ else if (*nptr == '+')
+ {
+ negative = false;
+ ++nptr;
+ }
+ else
+ negative = false;
+
+ /* If BASE is 0, determine the real base based on the beginning on
+ the number; octal numbers begin with "0", hexadecimal with "0x",
+ and the others are considered octal. */
+ if (*nptr == '0')
+ {
+ if ((base == 0 || base == 16)
+ &&
+ (*(nptr + 1) == 'x' || *(nptr + 1) == 'X'))
+ {
+ base = 16;
+ nptr += 2;
+ /* "0x" must be followed by at least one hex char. If not,
+ return 0 and place ENDPTR on 'x'. */
+ if (!ISXDIGIT (*nptr))
+ {
+ --nptr;
+ goto out;
+ }
+ }
+ else if (base == 0)
+ base = 8;
+ }
+ else if (base == 0)
+ base = 10;
+
+ if (!negative)
+ {
+ /* Parse positive number, checking for overflow. */
+ int digit;
+ /* Overflow watermark. If RESULT exceeds it, overflow occurs on
+ this digit. If result==WATERMARK, current digit may not
+ exceed the last digit of maximum value. */
+ const strtoll_type WATERMARK = STRTOLL_MAX / base;
+ for (; (digit = char_value (*nptr, base)) != -1; ++nptr)
+ {
+ if (result > WATERMARK
+ || (result == WATERMARK && digit > STRTOLL_MAX % base))
+ {
+ result = STRTOLL_MAX;
+ errno = ERANGE;
+ break;
+ }
+ result = base * result + digit;
+ }
+ }
+ else
+ {
+ /* Parse negative number, checking for underflow. */
+ int digit;
+ const strtoll_type WATERMARK = STRTOLL_MIN / base;
+ for (; (digit = char_value (*nptr, base)) != -1; ++nptr)
+ {
+ if (result < WATERMARK
+ || (result == WATERMARK && digit > MOD (STRTOLL_MIN, base)))
+ {
+ result = STRTOLL_MIN;
+ errno = ERANGE;
+ break;
+ }
+ result = base * result - digit;
+ }
+ }
+ out:
+ if (endptr)
+ *endptr = (char *) nptr;
+ return result;
+}
+
+#undef STRTOLL_MAX
+#undef STRTOLL_MIN
+#undef ABS
+
+#endif /* NEED_STRTOLL */
projects / wget / blobdiff