From 5cc13c0f36d18dd428c7cceebd30ff8de6e2ff1e Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Thu, 22 Sep 2005 23:08:15 +0000 Subject: * m4/getdate.m4 (gl_C_COMPOUND_LITERALS): New macro. (gl_GETDATE): Use it. * lib/getdate.y (relative_time): New type. (RELATIVE_TIME_0): New constant. (parser_control): Use relative_time instead of doing it ourselves. (%union): Add new relative_time rel member. (tYEAR_UNIT, tMONTH_UNIT, tHOUR_UNIT, tMINUTE_UNIT, tSEC_UNIT): Now typeless. (relunit, relunit_snumber): Now of type rel. (zone, rel, relunit, get_date): Adjust to above changes. --- lib/getdate.y | 159 ++++++++++++++++++++++++++++++++++------------------------ m4/getdate.m4 | 16 +++++- 2 files changed, 109 insertions(+), 66 deletions(-) diff --git a/lib/getdate.y b/lib/getdate.y index 868f98303d..dafc0eae47 100644 --- a/lib/getdate.y +++ b/lib/getdate.y @@ -137,6 +137,25 @@ enum { MERam, MERpm, MER24 }; enum { BILLION = 1000000000, LOG10_BILLION = 9 }; +/* Relative times. */ +typedef struct +{ + /* Relative year, month, day, hour, minutes, seconds, and nanoseconds. */ + long int year; + long int month; + long int day; + long int hour; + long int minutes; + long int seconds; + long int ns; +} relative_time; + +#if HAVE_COMPOUND_LITERALS +# define RELATIVE_TIME_0 ((relative_time) { 0, 0, 0, 0, 0, 0, 0 }) +#else +static relative_time const RELATIVE_TIME_0; +#endif + /* Information passed to and from the parser. */ typedef struct { @@ -167,13 +186,7 @@ typedef struct struct timespec seconds; /* includes nanoseconds */ /* Relative year, month, day, hour, minutes, seconds, and nanoseconds. */ - long int rel_year; - long int rel_month; - long int rel_day; - long int rel_hour; - long int rel_minutes; - long int rel_seconds; - long int rel_ns; + relative_time rel; /* Presence or counts of nonterminals of various flavors parsed so far. */ bool timespec_seen; @@ -210,13 +223,16 @@ static long int time_zone_hhmm (textint, long int); long int intval; textint textintval; struct timespec timespec; + relative_time rel; } %token tAGO tDST -%token tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tLOCAL_ZONE tMERIDIAN -%token tMINUTE_UNIT tMONTH tMONTH_UNIT tORDINAL -%token tSEC_UNIT tYEAR_UNIT tZONE +%token tYEAR_UNIT tMONTH_UNIT tHOUR_UNIT tMINUTE_UNIT tSEC_UNIT +%token tDAY_UNIT + +%token tDAY tDAYZONE tLOCAL_ZONE tMERIDIAN +%token tMONTH tORDINAL tZONE %token tSNUMBER tUNUMBER %token tSDECIMAL_NUMBER tUDECIMAL_NUMBER @@ -224,6 +240,8 @@ static long int time_zone_hhmm (textint, long int); %type o_colon_minutes o_merid %type seconds signed_seconds unsigned_seconds +%type relunit relunit_snumber + %% spec: @@ -322,7 +340,15 @@ zone: tZONE { pc->time_zone = $1; } | tZONE relunit_snumber - { pc->time_zone = $1; pc->rels_seen = true; } + { pc->time_zone = $1; + pc->rel.ns += $2.ns; + pc->rel.seconds += $2.seconds; + pc->rel.minutes += $2.minutes; + pc->rel.hour += $2.hour; + pc->rel.day += $2.day; + pc->rel.month += $2.month; + pc->rel.year += $2.year; + pc->rels_seen = true; } | tZONE tSNUMBER o_colon_minutes { pc->time_zone = $1 + time_zone_hhmm ($2, $3); } | tDAYZONE @@ -430,74 +456,83 @@ date: rel: relunit tAGO { - pc->rel_ns = -pc->rel_ns; - pc->rel_seconds = -pc->rel_seconds; - pc->rel_minutes = -pc->rel_minutes; - pc->rel_hour = -pc->rel_hour; - pc->rel_day = -pc->rel_day; - pc->rel_month = -pc->rel_month; - pc->rel_year = -pc->rel_year; + pc->rel.ns -= $1.ns; + pc->rel.seconds -= $1.seconds; + pc->rel.minutes -= $1.minutes; + pc->rel.hour -= $1.hour; + pc->rel.day -= $1.day; + pc->rel.month -= $1.month; + pc->rel.year -= $1.year; } | relunit + { + pc->rel.ns += $1.ns; + pc->rel.seconds += $1.seconds; + pc->rel.minutes += $1.minutes; + pc->rel.hour += $1.hour; + pc->rel.day += $1.day; + pc->rel.month += $1.month; + pc->rel.year += $1.year; + } ; relunit: tORDINAL tYEAR_UNIT - { pc->rel_year += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.year = $1; } | tUNUMBER tYEAR_UNIT - { pc->rel_year += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.year = $1.value; } | tYEAR_UNIT - { pc->rel_year += $1; } + { $$ = RELATIVE_TIME_0; $$.year = 1; } | tORDINAL tMONTH_UNIT - { pc->rel_month += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.month = $1; } | tUNUMBER tMONTH_UNIT - { pc->rel_month += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.month = $1.value; } | tMONTH_UNIT - { pc->rel_month += $1; } + { $$ = RELATIVE_TIME_0; $$.month = 1; } | tORDINAL tDAY_UNIT - { pc->rel_day += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.day = $1 * $2; } | tUNUMBER tDAY_UNIT - { pc->rel_day += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.day = $1.value * $2; } | tDAY_UNIT - { pc->rel_day += $1; } + { $$ = RELATIVE_TIME_0; $$.day = $1; } | tORDINAL tHOUR_UNIT - { pc->rel_hour += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.hour = $1; } | tUNUMBER tHOUR_UNIT - { pc->rel_hour += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.hour = $1.value; } | tHOUR_UNIT - { pc->rel_hour += $1; } + { $$ = RELATIVE_TIME_0; $$.hour = 1; } | tORDINAL tMINUTE_UNIT - { pc->rel_minutes += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.minutes = $1; } | tUNUMBER tMINUTE_UNIT - { pc->rel_minutes += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.minutes = $1.value; } | tMINUTE_UNIT - { pc->rel_minutes += $1; } + { $$ = RELATIVE_TIME_0; $$.minutes = 1; } | tORDINAL tSEC_UNIT - { pc->rel_seconds += $1 * $2; } + { $$ = RELATIVE_TIME_0; $$.seconds = $1; } | tUNUMBER tSEC_UNIT - { pc->rel_seconds += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.seconds = $1.value; } | tSDECIMAL_NUMBER tSEC_UNIT - { pc->rel_seconds += $1.tv_sec * $2; pc->rel_ns += $1.tv_nsec * $2; } + { $$ = RELATIVE_TIME_0; $$.seconds = $1.tv_sec; $$.ns = $1.tv_nsec; } | tUDECIMAL_NUMBER tSEC_UNIT - { pc->rel_seconds += $1.tv_sec * $2; pc->rel_ns += $1.tv_nsec * $2; } + { $$ = RELATIVE_TIME_0; $$.seconds = $1.tv_sec; $$.ns = $1.tv_nsec; } | tSEC_UNIT - { pc->rel_seconds += $1; } + { $$ = RELATIVE_TIME_0; $$.seconds = 1; } | relunit_snumber ; relunit_snumber: tSNUMBER tYEAR_UNIT - { pc->rel_year += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.year = $1.value; } | tSNUMBER tMONTH_UNIT - { pc->rel_month += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.month = $1.value; } | tSNUMBER tDAY_UNIT - { pc->rel_day += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.day = $1.value * $2; } | tSNUMBER tHOUR_UNIT - { pc->rel_hour += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.hour = $1.value; } | tSNUMBER tMINUTE_UNIT - { pc->rel_minutes += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.minutes = $1.value; } | tSNUMBER tSEC_UNIT - { pc->rel_seconds += $1.value * $2; } + { $$ = RELATIVE_TIME_0; $$.seconds = $1.value; } ; seconds: signed_seconds | unsigned_seconds; @@ -1215,13 +1250,7 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) tm.tm_isdst = tmp->tm_isdst; pc.meridian = MER24; - pc.rel_ns = 0; - pc.rel_seconds = 0; - pc.rel_minutes = 0; - pc.rel_hour = 0; - pc.rel_day = 0; - pc.rel_month = 0; - pc.rel_year = 0; + pc.rel = RELATIVE_TIME_0; pc.timespec_seen = false; pc.rels_seen = false; pc.dates_seen = 0; @@ -1318,7 +1347,7 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) } /* Let mktime deduce tm_isdst if we have an absolute time stamp. */ - if (!pc.rels_seen) + if (pc.dates_seen | pc.days_seen | pc.times_seen) tm.tm_isdst = -1; /* But if the input explicitly specifies local time with or without @@ -1396,14 +1425,14 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) } /* Add relative date. */ - if (pc.rel_year | pc.rel_month | pc.rel_day) + if (pc.rel.year | pc.rel.month | pc.rel.day) { - int year = tm.tm_year + pc.rel_year; - int month = tm.tm_mon + pc.rel_month; - int day = tm.tm_mday + pc.rel_day; - if (((year < tm.tm_year) ^ (pc.rel_year < 0)) - | ((month < tm.tm_mon) ^ (pc.rel_month < 0)) - | ((day < tm.tm_mday) ^ (pc.rel_day < 0))) + int year = tm.tm_year + pc.rel.year; + int month = tm.tm_mon + pc.rel.month; + int day = tm.tm_mday + pc.rel.day; + if (((year < tm.tm_year) ^ (pc.rel.year < 0)) + | ((month < tm.tm_mon) ^ (pc.rel.month < 0)) + | ((day < tm.tm_mday) ^ (pc.rel.day < 0))) goto fail; tm.tm_year = year; tm.tm_mon = month; @@ -1421,20 +1450,20 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) must be applied before relative times, and if mktime is applied again the time zone will be lost. */ { - long int sum_ns = pc.seconds.tv_nsec + pc.rel_ns; + long int sum_ns = pc.seconds.tv_nsec + pc.rel.ns; long int normalized_ns = (sum_ns % BILLION + BILLION) % BILLION; time_t t0 = Start; - long int d1 = 60 * 60 * pc.rel_hour; + long int d1 = 60 * 60 * pc.rel.hour; time_t t1 = t0 + d1; - long int d2 = 60 * pc.rel_minutes; + long int d2 = 60 * pc.rel.minutes; time_t t2 = t1 + d2; - long int d3 = pc.rel_seconds; + long int d3 = pc.rel.seconds; time_t t3 = t2 + d3; long int d4 = (sum_ns - normalized_ns) / BILLION; time_t t4 = t3 + d4; - if ((d1 / (60 * 60) ^ pc.rel_hour) - | (d2 / 60 ^ pc.rel_minutes) + if ((d1 / (60 * 60) ^ pc.rel.hour) + | (d2 / 60 ^ pc.rel.minutes) | ((t1 < t0) ^ (d1 < 0)) | ((t2 < t1) ^ (d2 < 0)) | ((t3 < t2) ^ (d3 < 0)) diff --git a/m4/getdate.m4 b/m4/getdate.m4 index 5b2f77f239..2981f139d7 100644 --- a/m4/getdate.m4 +++ b/m4/getdate.m4 @@ -1,9 +1,22 @@ -# getdate.m4 serial 7 +# getdate.m4 serial 8 dnl Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. +AC_DEFUN([gl_C_COMPOUND_LITERALS], +[ + AC_CACHE_CHECK([for compound literals], gl_cv_compound_literals, + [AC_TRY_COMPILE([struct s { int i, j; }; struct s s = (struct s) { 1, 2 };], + [struct s t = (struct s) { 3, 4 };], + gl_cv_compound_literals=yes, + gl_cv_compound_literals=no)]) + if test $gl_cv_compound_literals = yes; then + AC_DEFINE(HAVE_COMPOUND_LITERALS, 1, + [Define if you have compound literals.]) + fi +]) + AC_DEFUN([gl_GETDATE], [ AC_LIBSOURCES([getdate.h, getdate.y]) @@ -15,6 +28,7 @@ AC_DEFUN([gl_GETDATE], dnl Prerequisites of lib/getdate.y. AC_REQUIRE([gl_BISON]) + AC_REQUIRE([gl_C_COMPOUND_LITERALS]) AC_REQUIRE([AC_HEADER_STDC]) AC_CHECK_FUNCS_ONCE(isascii) AC_STRUCT_TIMEZONE -- cgit v1.2.1