X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fgetdate.y;h=877b264250ac6c15d6f0e73faf8c2f4528f1c29e;hb=5de13253a6452a29eedec21a53980febd6d3b2b9;hp=1deec5160de23f166e0e569778e8824cc4e56d4a;hpb=138fc7e67e3d9845cd7d81aad0e9c7724784f9b9;p=debian%2Ftar diff --git a/lib/getdate.y b/lib/getdate.y index 1deec516..877b2642 100644 --- a/lib/getdate.y +++ b/lib/getdate.y @@ -1,8 +1,8 @@ %{ /* Parse a string into an internal time stamp. - Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007 Free Software - Foundation, Inc. + Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008 + Free Software Foundation, Inc. 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 @@ -60,7 +60,7 @@ # undef static #endif -#include +#include #include #include #include @@ -205,7 +205,7 @@ typedef struct union YYSTYPE; static int yylex (union YYSTYPE *, parser_control *); static int yyerror (parser_control const *, char const *); -static long int time_zone_hhmm (textint, long int); +static long int time_zone_hhmm (parser_control *, textint, long int); /* Extract into *PC any date and time info from a string of digits of the form e.g., YYYYMMDD, YYMMDD, HHMM, HH (and sometimes YYY, @@ -246,6 +246,31 @@ digits_to_date_time (parser_control *pc, textint text_int) } } +/* Increment PC->rel by FACTOR * REL (FACTOR is 1 or -1). */ +static void +apply_relative_time (parser_control *pc, relative_time rel, int factor) +{ + pc->rel.ns += factor * rel.ns; + pc->rel.seconds += factor * rel.seconds; + pc->rel.minutes += factor * rel.minutes; + pc->rel.hour += factor * rel.hour; + pc->rel.day += factor * rel.day; + pc->rel.month += factor * rel.month; + pc->rel.year += factor * rel.year; + pc->rels_seen = true; +} + +/* Set PC-> hour, minutes, seconds and nanoseconds members from arguments. */ +static void +set_hhmmss (parser_control *pc, long int hour, long int minutes, + time_t sec, long int nsec) +{ + pc->hour = hour; + pc->minutes = minutes; + pc->seconds.tv_sec = sec; + pc->seconds.tv_nsec = nsec; +} + %} /* We want a reentrant parser, even if the TZ manipulation and the calls to @@ -268,7 +293,7 @@ digits_to_date_time (parser_control *pc, textint text_int) %token tAGO tDST %token tYEAR_UNIT tMONTH_UNIT tHOUR_UNIT tMINUTE_UNIT tSEC_UNIT -%token tDAY_UNIT +%token tDAY_UNIT tDAY_SHIFT %token tDAY tDAYZONE tLOCAL_ZONE tMERIDIAN %token tMONTH tORDINAL tZONE @@ -279,7 +304,7 @@ digits_to_date_time (parser_control *pc, textint text_int) %type o_colon_minutes o_merid %type seconds signed_seconds unsigned_seconds -%type relunit relunit_snumber +%type relunit relunit_snumber dayshift %% @@ -313,7 +338,6 @@ item: | day { pc->days_seen++; } | rel - { pc->rels_seen = true; } | number | hybrid ; @@ -321,45 +345,32 @@ item: time: tUNUMBER tMERIDIAN { - pc->hour = $1.value; - pc->minutes = 0; - pc->seconds.tv_sec = 0; - pc->seconds.tv_nsec = 0; + set_hhmmss (pc, $1.value, 0, 0, 0); pc->meridian = $2; } | tUNUMBER ':' tUNUMBER o_merid { - pc->hour = $1.value; - pc->minutes = $3.value; - pc->seconds.tv_sec = 0; - pc->seconds.tv_nsec = 0; + set_hhmmss (pc, $1.value, $3.value, 0, 0); pc->meridian = $4; } | tUNUMBER ':' tUNUMBER tSNUMBER o_colon_minutes { - pc->hour = $1.value; - pc->minutes = $3.value; - pc->seconds.tv_sec = 0; - pc->seconds.tv_nsec = 0; + set_hhmmss (pc, $1.value, $3.value, 0, 0); pc->meridian = MER24; pc->zones_seen++; - pc->time_zone = time_zone_hhmm ($4, $5); + pc->time_zone = time_zone_hhmm (pc, $4, $5); } | tUNUMBER ':' tUNUMBER ':' unsigned_seconds o_merid { - pc->hour = $1.value; - pc->minutes = $3.value; - pc->seconds = $5; + set_hhmmss (pc, $1.value, $3.value, $5.tv_sec, $5.tv_nsec); pc->meridian = $6; } | tUNUMBER ':' tUNUMBER ':' unsigned_seconds tSNUMBER o_colon_minutes { - pc->hour = $1.value; - pc->minutes = $3.value; - pc->seconds = $5; + set_hhmmss (pc, $1.value, $3.value, $5.tv_sec, $5.tv_nsec); pc->meridian = MER24; pc->zones_seen++; - pc->time_zone = time_zone_hhmm ($6, $7); + pc->time_zone = time_zone_hhmm (pc, $6, $7); } ; @@ -381,16 +392,9 @@ zone: { pc->time_zone = $1; } | tZONE relunit_snumber { 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; } + apply_relative_time (pc, $2, 1); } | tZONE tSNUMBER o_colon_minutes - { pc->time_zone = $1 + time_zone_hhmm ($2, $3); } + { pc->time_zone = $1 + time_zone_hhmm (pc, $2, $3); } | tDAYZONE { pc->time_zone = $1 + 60; } | tZONE tDST @@ -495,25 +499,11 @@ date: rel: relunit tAGO - { - 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; - } + { apply_relative_time (pc, $1, -1); } | 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; - } + { apply_relative_time (pc, $1, 1); } + | dayshift + { apply_relative_time (pc, $1, 1); } ; relunit: @@ -575,6 +565,11 @@ relunit_snumber: { $$ = RELATIVE_TIME_0; $$.seconds = $1.value; } ; +dayshift: + tDAY_SHIFT + { $$ = RELATIVE_TIME_0; $$.day = $1; } + ; + seconds: signed_seconds | unsigned_seconds; signed_seconds: @@ -600,14 +595,7 @@ hybrid: /* Hybrid all-digit and relative offset, so that we accept e.g., "YYYYMMDD +N days" as well as "YYYYMMDD N days". */ digits_to_date_time (pc, $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; + apply_relative_time (pc, $2, 1); } ; @@ -688,10 +676,10 @@ static table const time_units_table[] = /* Assorted relative-time words. */ static table const relative_time_table[] = { - { "TOMORROW", tDAY_UNIT, 1 }, - { "YESTERDAY",tDAY_UNIT, -1 }, - { "TODAY", tDAY_UNIT, 0 }, - { "NOW", tDAY_UNIT, 0 }, + { "TOMORROW", tDAY_SHIFT, 1 }, + { "YESTERDAY",tDAY_SHIFT, -1 }, + { "TODAY", tDAY_SHIFT, 0 }, + { "NOW", tDAY_SHIFT, 0 }, { "LAST", tORDINAL, -1 }, { "THIS", tORDINAL, 0 }, { "NEXT", tORDINAL, 1 }, @@ -814,15 +802,33 @@ static table const military_table[] = /* Convert a time zone expressed as HH:MM into an integer count of minutes. If MM is negative, then S is of the form HHMM and needs - to be picked apart; otherwise, S is of the form HH. */ + to be picked apart; otherwise, S is of the form HH. As specified in + http://www.opengroup.org/susv3xbd/xbd_chap08.html#tag_08_03, allow + only valid TZ range, and consider first two digits as hours, if no + minutes specified. */ static long int -time_zone_hhmm (textint s, long int mm) +time_zone_hhmm (parser_control *pc, textint s, long int mm) { + long int n_minutes; + + /* If the length of S is 1 or 2 and no minutes are specified, + interpret it as a number of hours. */ + if (s.digits <= 2 && mm < 0) + s.value *= 100; + if (mm < 0) - return (s.value / 100) * 60 + s.value % 100; + n_minutes = (s.value / 100) * 60 + s.value % 100; else - return s.value * 60 + (s.negative ? -mm : mm); + n_minutes = s.value * 60 + (s.negative ? -mm : mm); + + /* If the absolute number of minutes is larger than 24 hours, + arrange to reject it by incrementing pc->zones_seen. Thus, + we allow only values in the range UTC-24:00 to UTC+24:00. */ + if (24 * 60 < abs (n_minutes)) + pc->zones_seen++; + + return n_minutes; } static int @@ -919,7 +925,7 @@ lookup_word (parser_control const *pc, char *word) for (p = word; *p; p++) { unsigned char ch = *p; - *p = toupper (ch); + *p = c_toupper (ch); } for (tp = meridian_table; tp->name; tp++) @@ -984,7 +990,7 @@ yylex (YYSTYPE *lvalp, parser_control *pc) for (;;) { - while (c = *pc->input, isspace (c)) + while (c = *pc->input, c_isspace (c)) pc->input++; if (ISDIGIT (c) || c == '-' || c == '+') @@ -995,7 +1001,7 @@ yylex (YYSTYPE *lvalp, parser_control *pc) if (c == '-' || c == '+') { sign = c == '-' ? -1 : 1; - while (c = *++pc->input, isspace (c)) + while (c = *++pc->input, c_isspace (c)) continue; if (! ISDIGIT (c)) /* skip the '-' sign */ @@ -1099,7 +1105,7 @@ yylex (YYSTYPE *lvalp, parser_control *pc) } } - if (isalpha (c)) + if (c_isalpha (c)) { char buff[20]; char *p = buff; @@ -1111,7 +1117,7 @@ yylex (YYSTYPE *lvalp, parser_control *pc) *p++ = c; c = *++pc->input; } - while (isalpha (c) || c == '.'); + while (c_isalpha (c) || c == '.'); *p = '\0'; tp = lookup_word (pc, buff); @@ -1224,7 +1230,7 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) if (! tmp) return false; - while (c = *p, isspace (c)) + while (c = *p, c_isspace (c)) p++; if (strncmp (p, "TZ=\"", 4) == 0) @@ -1436,25 +1442,6 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) goto fail; } - if (pc.zones_seen) - { - long int delta = pc.time_zone * 60; - time_t t1; -#ifdef HAVE_TM_GMTOFF - delta -= tm.tm_gmtoff; -#else - time_t t = Start; - struct tm const *gmt = gmtime (&t); - if (! gmt) - goto fail; - delta -= tm_diff (&tm, gmt); -#endif - t1 = Start - delta; - if ((Start < t1) != (delta < 0)) - goto fail; /* time_t overflow */ - Start = t1; - } - /* Add relative date. */ if (pc.rel.year | pc.rel.month | pc.rel.day) { @@ -1477,6 +1464,27 @@ get_date (struct timespec *result, char const *p, struct timespec const *now) goto fail; } + /* The only "output" of this if-block is an updated Start value, + so this block must follow others that clobber Start. */ + if (pc.zones_seen) + { + long int delta = pc.time_zone * 60; + time_t t1; +#ifdef HAVE_TM_GMTOFF + delta -= tm.tm_gmtoff; +#else + time_t t = Start; + struct tm const *gmt = gmtime (&t); + if (! gmt) + goto fail; + delta -= tm_diff (&tm, gmt); +#endif + t1 = Start - delta; + if ((Start < t1) != (delta < 0)) + goto fail; /* time_t overflow */ + Start = t1; + } + /* Add relative hours, minutes, and seconds. On hosts that support leap seconds, ignore the possibility of leap seconds; e.g., "+ 10 minutes" adds 600 seconds, even if one of them is a