X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fstat-time.h;h=104f53766829c5aa3709d9b6bfa7657799813bae;hb=80de5593c97eff61f31584362041b5b2432fbe48;hp=649c848732bd8b184f39b08989ed7b11c7ca420c;hpb=013796abf4c6be0bd130f541c0ece156156239c3;p=debian%2Fgzip diff --git a/lib/stat-time.h b/lib/stat-time.h index 649c848..104f537 100644 --- a/lib/stat-time.h +++ b/lib/stat-time.h @@ -1,11 +1,11 @@ /* stat-related time functions. - Copyright (C) 2005, 2007 Free Software Foundation, Inc. + Copyright (C) 2005, 2007, 2009-2018 Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or modify + This program 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, or (at your option) - any later version. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -13,17 +13,32 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + along with this program. If not, see . */ /* Written by Paul Eggert. */ #ifndef STAT_TIME_H #define STAT_TIME_H 1 +#include "intprops.h" + +#include +#include #include #include +#ifndef _GL_INLINE_HEADER_BEGIN + #error "Please include config.h first." +#endif +_GL_INLINE_HEADER_BEGIN +#ifndef _GL_STAT_TIME_INLINE +# define _GL_STAT_TIME_INLINE _GL_INLINE +#endif + +#ifdef __cplusplus +extern "C" { +#endif + /* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type struct timespec, if available. If not, then STAT_TIMESPEC_NS (ST, ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST, @@ -32,8 +47,8 @@ time respectively. These macros are private to stat-time.h. */ -#if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC -# ifdef TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC +#if _GL_WINDOWS_STAT_TIMESPEC || defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC +# if _GL_WINDOWS_STAT_TIMESPEC || defined TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC # define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim) # else # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.tv_nsec) @@ -47,7 +62,7 @@ #endif /* Return the nanosecond component of *ST's access time. */ -static inline long int +_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE get_stat_atime_ns (struct stat const *st) { # if defined STAT_TIMESPEC @@ -60,7 +75,7 @@ get_stat_atime_ns (struct stat const *st) } /* Return the nanosecond component of *ST's status change time. */ -static inline long int +_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE get_stat_ctime_ns (struct stat const *st) { # if defined STAT_TIMESPEC @@ -73,7 +88,7 @@ get_stat_ctime_ns (struct stat const *st) } /* Return the nanosecond component of *ST's data modification time. */ -static inline long int +_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE get_stat_mtime_ns (struct stat const *st) { # if defined STAT_TIMESPEC @@ -86,8 +101,8 @@ get_stat_mtime_ns (struct stat const *st) } /* Return the nanosecond component of *ST's birth time. */ -static inline long int -get_stat_birthtime_ns (struct stat const *st) +_GL_STAT_TIME_INLINE long int _GL_ATTRIBUTE_PURE +get_stat_birthtime_ns (struct stat const *st _GL_UNUSED) { # if defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC return STAT_TIMESPEC (st, st_birthtim).tv_nsec; @@ -99,7 +114,7 @@ get_stat_birthtime_ns (struct stat const *st) } /* Return *ST's access time. */ -static inline struct timespec +_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE get_stat_atime (struct stat const *st) { #ifdef STAT_TIMESPEC @@ -113,7 +128,7 @@ get_stat_atime (struct stat const *st) } /* Return *ST's status change time. */ -static inline struct timespec +_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE get_stat_ctime (struct stat const *st) { #ifdef STAT_TIMESPEC @@ -127,7 +142,7 @@ get_stat_ctime (struct stat const *st) } /* Return *ST's data modification time. */ -static inline struct timespec +_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE get_stat_mtime (struct stat const *st) { #ifdef STAT_TIMESPEC @@ -141,9 +156,9 @@ get_stat_mtime (struct stat const *st) } /* Return *ST's birth time, if available; otherwise return a value - with negative tv_nsec. */ -static inline struct timespec -get_stat_birthtime (struct stat const *st) + with tv_sec and tv_nsec both equal to -1. */ +_GL_STAT_TIME_INLINE struct timespec _GL_ATTRIBUTE_PURE +get_stat_birthtime (struct stat const *st _GL_UNUSED) { struct timespec t; @@ -154,13 +169,17 @@ get_stat_birthtime (struct stat const *st) t.tv_sec = st->st_birthtime; t.tv_nsec = st->st_birthtimensec; #elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ - /* Woe32 native platforms (but not Cygwin) put the "file creation + /* Native Windows platforms (but not Cygwin) put the "file creation time" in st_ctime (!). See - . */ + . */ +# if _GL_WINDOWS_STAT_TIMESPEC + t = st->st_ctim; +# else t.tv_sec = st->st_ctime; t.tv_nsec = 0; +# endif #else - /* Birth time is not supported. Set tv_sec to avoid undefined behavior. */ + /* Birth time is not supported. */ t.tv_sec = -1; t.tv_nsec = -1; #endif @@ -170,15 +189,64 @@ get_stat_birthtime (struct stat const *st) || defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC) /* FreeBSD and NetBSD sometimes signal the absence of knowledge by using zero. Attempt to work around this problem. Alas, this can - report failure even for valid time stamps. Also, NetBSD + report failure even for valid timestamps. Also, NetBSD sometimes returns junk in the birth time fields; work around this - bug if it it is detected. There's no need to detect negative - tv_nsec junk as negative tv_nsec already indicates an error. */ - if (t.tv_sec == 0 || 1000000000 <= t.tv_nsec) - t.tv_nsec = -1; + bug if it is detected. */ + if (! (t.tv_sec && 0 <= t.tv_nsec && t.tv_nsec < 1000000000)) + { + t.tv_sec = -1; + t.tv_nsec = -1; + } #endif return t; } +/* If a stat-like function returned RESULT, normalize the timestamps + in *ST, in case this platform suffers from the Solaris 11 bug where + tv_nsec might be negative. Return the adjusted RESULT, setting + errno to EOVERFLOW if normalization overflowed. This function + is intended to be private to this .h file. */ +_GL_STAT_TIME_INLINE int +stat_time_normalize (int result, struct stat *st _GL_UNUSED) +{ +#if defined __sun && defined STAT_TIMESPEC + if (result == 0) + { + long int timespec_resolution = 1000000000; + short int const ts_off[] = { offsetof (struct stat, st_atim), + offsetof (struct stat, st_mtim), + offsetof (struct stat, st_ctim) }; + int i; + for (i = 0; i < sizeof ts_off / sizeof *ts_off; i++) + { + struct timespec *ts = (struct timespec *) ((char *) st + ts_off[i]); + long int q = ts->tv_nsec / timespec_resolution; + long int r = ts->tv_nsec % timespec_resolution; + if (r < 0) + { + r += timespec_resolution; + q--; + } + ts->tv_nsec = r; + /* Overflow is possible, as Solaris 11 stat can yield + tv_sec == TYPE_MINIMUM (time_t) && tv_nsec == -1000000000. + INT_ADD_WRAPV is OK, since time_t is signed on Solaris. */ + if (INT_ADD_WRAPV (q, ts->tv_sec, &ts->tv_sec)) + { + errno = EOVERFLOW; + return -1; + } + } + } +#endif + return result; +} + +#ifdef __cplusplus +} +#endif + +_GL_INLINE_HEADER_END + #endif