Date: Wed, 8 Oct 2014 16:32:02 +0000 (UTC) From: "Pedro F. Giffuni" <pfg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r272759 - stable/9/lib/libc/stdtime Message-ID: <201410081632.s98GW2Jb081156@svn.freebsd.org>
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Author: pfg Date: Wed Oct 8 16:32:01 2014 New Revision: 272759 URL: https://svnweb.freebsd.org/changeset/base/272759 Log: MFC r272273, r272387, r272443, r272533 : Add strptime(3) support for %U and %W Add support for the missing POSIX-2001 %U and %W features: the existing FreeBSD strptime code recognizes both directives and validates that the week number lies in the permitted range, but then simply discards the value. Initial support for the feature was written by Paul Green. David Carlier added the initial handling of tm_wday/tm_yday. Major credit goes to Andrey Chernov for detecting much of the brokenness and rewriting/cleaning most of the code, making it much more robust. Tested independently with the strptime test from the GNU C library. PR: 137307 Relnotes: yes MFC r272441 : strptime: %s format fix. Almost never needed in real life because %s is tends to be only one format spec. 1) Return code of gmtime_r() is checked. 2) All flags are set. Submitted by: ache Modified: stable/9/lib/libc/stdtime/strptime.3 stable/9/lib/libc/stdtime/strptime.c Directory Properties: stable/9/lib/libc/ (props changed) stable/9/lib/libc/stdtime/ (props changed) Modified: stable/9/lib/libc/stdtime/strptime.3 ============================================================================== --- stable/9/lib/libc/stdtime/strptime.3 Wed Oct 8 16:29:46 2014 (r272758) +++ stable/9/lib/libc/stdtime/strptime.3 Wed Oct 8 16:32:01 2014 (r272759) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" " -.Dd June 25, 2012 +.Dd October 2, 2014 .Dt STRPTIME 3 .Os .Sh NAME @@ -80,6 +80,11 @@ and are now interpreted as beginning at 1969 per POSIX requirements. Years 69-00 are interpreted in the 20th century (1969-2000), years 01-68 in the 21st century (2001-2068). +The +.Fa \&%U +and +.Fa %W +format specifiers accept any value within the range 00 to 53. .Pp If the .Fa format @@ -161,14 +166,6 @@ and 12PM is taken as noon. .Pp The -.Fa \&%U -and -.Fa %W -format specifiers accept any value within the range 00 to 53 -without validating against other values supplied (like month -or day of the year, for example). -.Pp -The .Fa %Z format specifier only accepts time zone abbreviations of the local time zone, or the value "GMT". Modified: stable/9/lib/libc/stdtime/strptime.c ============================================================================== --- stable/9/lib/libc/stdtime/strptime.c Wed Oct 8 16:29:46 2014 (r272758) +++ stable/9/lib/libc/stdtime/strptime.c Wed Oct 8 16:32:01 2014 (r272759) @@ -55,10 +55,32 @@ __FBSDID("$FreeBSD$"); #include "un-namespace.h" #include "libc_private.h" #include "timelocal.h" +#include "tzfile.h" static char * _strptime(const char *, const char *, struct tm *, int *, locale_t); -#define asizeof(a) (sizeof (a) / sizeof ((a)[0])) +#define asizeof(a) (sizeof(a) / sizeof((a)[0])) + +#define FLAG_NONE (1 << 0) +#define FLAG_YEAR (1 << 1) +#define FLAG_MONTH (1 << 2) +#define FLAG_YDAY (1 << 3) +#define FLAG_MDAY (1 << 4) +#define FLAG_WDAY (1 << 5) + +/* + * Calculate the week day of the first day of a year. Valid for + * the Gregorian calendar, which began Sept 14, 1752 in the UK + * and its colonies. Ref: + * http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week + */ + +static int +first_wday_of(int year) +{ + return (((2 * (3 - (year / 100) % 4)) + (year % 100) + + ((year % 100) / 4) + (isleap(year) ? 6 : 0) + 1) % 7); +} static char * _strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp, @@ -66,9 +88,18 @@ _strptime(const char *buf, const char *f { char c; const char *ptr; + int day_offset = -1, wday_offset; + int week_offset; int i, len; + int flags; int Ealternative, Oalternative; - struct lc_time_T *tptr = __get_current_time_locale(locale); + const struct lc_time_T *tptr = __get_current_time_locale(locale); + static int start_of_month[2][13] = { + {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}, + {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366} + }; + + flags = FLAG_NONE; ptr = fmt; while (*ptr != 0) { @@ -102,6 +133,7 @@ label: buf = _strptime(buf, tptr->date_fmt, tm, GMTp, locale); if (buf == NULL) return (NULL); + flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; break; case 'C': @@ -119,19 +151,23 @@ label: if (i < 19) return (NULL); - tm->tm_year = i * 100 - 1900; + tm->tm_year = i * 100 - TM_YEAR_BASE; + flags |= FLAG_YEAR; + break; case 'c': buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale); if (buf == NULL) return (NULL); + flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; break; case 'D': buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale); if (buf == NULL) return (NULL); + flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; break; case 'E': @@ -150,6 +186,7 @@ label: buf = _strptime(buf, "%Y-%m-%d", tm, GMTp, locale); if (buf == NULL) return (NULL); + flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; break; case 'R': @@ -180,6 +217,7 @@ label: buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale); if (buf == NULL) return (NULL); + flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR; break; case 'j': @@ -197,6 +235,8 @@ label: return (NULL); tm->tm_yday = i - 1; + flags |= FLAG_YDAY; + break; case 'M': @@ -302,8 +342,9 @@ label: if (i == asizeof(tptr->weekday)) return (NULL); - tm->tm_wday = i; buf += len; + tm->tm_wday = i; + flags |= FLAG_WDAY; break; case 'U': @@ -327,6 +368,14 @@ label: if (i > 53) return (NULL); + if (c == 'U') + day_offset = TM_SUNDAY; + else + day_offset = TM_MONDAY; + + + week_offset = i; + break; case 'w': @@ -338,6 +387,7 @@ label: return (NULL); tm->tm_wday = i; + flags |= FLAG_WDAY; break; @@ -374,6 +424,7 @@ label: return (NULL); tm->tm_mday = i; + flags |= FLAG_MDAY; break; @@ -413,6 +464,8 @@ label: tm->tm_mon = i; buf += len; + flags |= FLAG_MONTH; + break; case 'm': @@ -430,6 +483,7 @@ label: return (NULL); tm->tm_mon = i - 1; + flags |= FLAG_MONTH; break; @@ -449,8 +503,11 @@ label: } errno = sverrno; buf = cp; - gmtime_r(&t, tm); + if (gmtime_r(&t, tm) == NULL) + return (NULL); *GMTp = 1; + flags |= FLAG_YDAY | FLAG_WDAY | FLAG_MONTH | + FLAG_MDAY | FLAG_YEAR; } break; @@ -471,13 +528,14 @@ label: len--; } if (c == 'Y') - i -= 1900; + i -= TM_YEAR_BASE; if (c == 'y' && i < 69) i += 100; if (i < 0) return (NULL); tm->tm_year = i; + flags |= FLAG_YEAR; break; @@ -543,10 +601,67 @@ label: break; } } + + if (!(flags & FLAG_YDAY) && (flags & FLAG_YEAR)) { + if ((flags & (FLAG_MONTH | FLAG_MDAY)) == + (FLAG_MONTH | FLAG_MDAY)) { + tm->tm_yday = start_of_month[isleap(tm->tm_year + + TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1); + flags |= FLAG_YDAY; + } else if (day_offset != -1) { + /* Set the date to the first Sunday (or Monday) + * of the specified week of the year. + */ + if (!(flags & FLAG_WDAY)) { + tm->tm_wday = day_offset; + flags |= FLAG_WDAY; + } + tm->tm_yday = (7 - + first_wday_of(tm->tm_year + TM_YEAR_BASE) + + day_offset) % 7 + (week_offset - 1) * 7 + + tm->tm_wday - day_offset; + flags |= FLAG_YDAY; + } + } + + if ((flags & (FLAG_YEAR | FLAG_YDAY)) == (FLAG_YEAR | FLAG_YDAY)) { + if (!(flags & FLAG_MONTH)) { + i = 0; + while (tm->tm_yday >= + start_of_month[isleap(tm->tm_year + + TM_YEAR_BASE)][i]) + i++; + if (i > 12) { + i = 1; + tm->tm_yday -= + start_of_month[isleap(tm->tm_year + + TM_YEAR_BASE)][12]; + tm->tm_year++; + } + tm->tm_mon = i - 1; + flags |= FLAG_MONTH; + } + if (!(flags & FLAG_MDAY)) { + tm->tm_mday = tm->tm_yday - + start_of_month[isleap(tm->tm_year + TM_YEAR_BASE)] + [tm->tm_mon] + 1; + flags |= FLAG_MDAY; + } + if (!(flags & FLAG_WDAY)) { + i = 0; + wday_offset = first_wday_of(tm->tm_year); + while (i++ <= tm->tm_yday) { + if (wday_offset++ >= 6) + wday_offset = 0; + } + tm->tm_wday = wday_offset; + flags |= FLAG_WDAY; + } + } + return ((char *)buf); } - char * strptime_l(const char * __restrict buf, const char * __restrict fmt, struct tm * __restrict tm, locale_t loc) @@ -564,6 +679,7 @@ strptime_l(const char * __restrict buf, return (ret); } + char * strptime(const char * __restrict buf, const char * __restrict fmt, struct tm * __restrict tm)
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