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<pre><a name="line-1"></a><span class='hs-comment'>{- |
<a name="line-2"></a> Module : System.Time.ParseDate
<a name="line-3"></a> Copyright : (c) by Björn Bringert
<a name="line-4"></a> License : GPL2
<a name="line-5"></a>
<a name="line-6"></a> Maintainer : Björn Bringert
<a name="line-7"></a> Stability : provisional
<a name="line-8"></a> Portability : portable
<a name="line-9"></a>
<a name="line-10"></a>Utility for parsing dates.
<a name="line-11"></a>-}</span>
<a name="line-12"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Time</span><span class='hs-varop'>.</span><span class='hs-conid'>ParseDate</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseCalendarTime</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>isSpace</span><span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Locale</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Time</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Parsec</span>
<a name="line-19"></a>
<a name="line-20"></a><a name="parseCalendarTime"></a><span class='hs-comment'>{- | Parse a date string as formatted by 'formatCalendarTime'.
<a name="line-21"></a>
<a name="line-22"></a> The resulting 'CalendarTime' will only have those fields set that
<a name="line-23"></a> are represented by a format specifier in the format string, and those
<a name="line-24"></a> fields will be set to the values given in the date string.
<a name="line-25"></a> If the same field is specified multiple times, the rightmost
<a name="line-26"></a> occurence takes precedence.
<a name="line-27"></a>
<a name="line-28"></a> The resulting date is not neccessarily a valid date. For example,
<a name="line-29"></a> if there is no day of the week specifier in the format string,
<a name="line-30"></a> the value of 'ctWDay' will most likely be invalid.
<a name="line-31"></a>
<a name="line-32"></a> Format specifiers are % followed by some character. All other
<a name="line-33"></a> characters are treated literally. Whitespace in the format string
<a name="line-34"></a> matches zero or more arbitrary whitespace characters.
<a name="line-35"></a>
<a name="line-36"></a> Format specifiers marked with * are matched, but do not set any
<a name="line-37"></a> field in the output.
<a name="line-38"></a>
<a name="line-39"></a> Some of the format specifiers are marked as space-padded or
<a name="line-40"></a> zero-padded. Regardless of this, space-padded, zero-padded
<a name="line-41"></a> or unpadded inputs are accepted. Note that strings using
<a name="line-42"></a> unpadded fields without separating the fields may cause
<a name="line-43"></a> strange parsing.
<a name="line-44"></a>
<a name="line-45"></a> Supported format specfiers:
<a name="line-46"></a>
<a name="line-47"></a> [%%] a % character.
<a name="line-48"></a>
<a name="line-49"></a> [%a] locale's abbreviated weekday name (Sun ... Sat)
<a name="line-50"></a>
<a name="line-51"></a> [%A] locale's full weekday name (Sunday .. Saturday)
<a name="line-52"></a>
<a name="line-53"></a> [%b] locale's abbreviated month name (Jan..Dec)
<a name="line-54"></a>
<a name="line-55"></a> [%B] locale's full month name (January..December)
<a name="line-56"></a>
<a name="line-57"></a> [%c] locale's date and time format (Thu Mar 25 17:47:03 CET 2004)
<a name="line-58"></a>
<a name="line-59"></a> [%C] century [00-99]
<a name="line-60"></a>
<a name="line-61"></a> [%d] day of month, zero padded (01..31)
<a name="line-62"></a>
<a name="line-63"></a> [%D] date (%m\/%d\/%y)
<a name="line-64"></a>
<a name="line-65"></a> [%e] day of month, space padded ( 1..31)
<a name="line-66"></a>
<a name="line-67"></a> [%h] same as %b
<a name="line-68"></a>
<a name="line-69"></a> [%H] hour, 24-hour clock, zero padded (00..23)
<a name="line-70"></a>
<a name="line-71"></a> [%I] hour, 12-hour clock, zero padded (01..12)
<a name="line-72"></a>
<a name="line-73"></a> [%j] day of the year, zero padded (001..366)
<a name="line-74"></a>
<a name="line-75"></a> [%k] hour, 24-hour clock, space padded ( 0..23)
<a name="line-76"></a>
<a name="line-77"></a> [%l] hour, 12-hour clock, space padded ( 1..12)
<a name="line-78"></a>
<a name="line-79"></a> [%m] month, zero padded (01..12)
<a name="line-80"></a>
<a name="line-81"></a> [%M] minute, zero padded (00..59)
<a name="line-82"></a>
<a name="line-83"></a> [%n] a newline character
<a name="line-84"></a>
<a name="line-85"></a> [%p] locale's AM or PM indicator
<a name="line-86"></a>
<a name="line-87"></a> [%r] locale's 12-hour time format (hh:mm:ss AM\/PM)
<a name="line-88"></a>
<a name="line-89"></a> [%R] hours and minutes, 24-hour clock (hh:mm)
<a name="line-90"></a>
<a name="line-91"></a> [%s] * seconds since '00:00:00 1970-01-01 UTC'
<a name="line-92"></a>
<a name="line-93"></a> [%S] seconds, zero padded (00..59)
<a name="line-94"></a>
<a name="line-95"></a> [%t] a horizontal tab character
<a name="line-96"></a>
<a name="line-97"></a> [%T] time, 24-hour clock (hh:mm:ss)
<a name="line-98"></a>
<a name="line-99"></a> [%u] numeric day of the week (1=Monday, 7=Sunday)
<a name="line-100"></a>
<a name="line-101"></a> [%U] * week number, weeks starting on Sunday, zero padded (01-53)
<a name="line-102"></a>
<a name="line-103"></a> [%V] * week number (as per ISO-8601),
<a name="line-104"></a> week 1 is the first week with a Thursday,
<a name="line-105"></a> zero padded, (01-53)
<a name="line-106"></a>
<a name="line-107"></a> [%w] numeric day of the week, (0=Sunday, 6=Monday)
<a name="line-108"></a>
<a name="line-109"></a> [%W] * week number, weeks starting on Monday, zero padded (01-53)
<a name="line-110"></a>
<a name="line-111"></a> [%x] locale's preferred way of printing dates (%m\/%d\/%y)
<a name="line-112"></a>
<a name="line-113"></a> [%X] locale's preferred way of printing time. (%H:%M:%S)
<a name="line-114"></a>
<a name="line-115"></a> [%y] year, within century, zero padded (00..99)
<a name="line-116"></a>
<a name="line-117"></a> [%Y] year, including century. Not padded
<a name="line-118"></a> (this is probably a bug, but formatCalendarTime does
<a name="line-119"></a> it this way). (0-9999)
<a name="line-120"></a>
<a name="line-121"></a> [%Z] time zone abbreviation (e.g. CET) or RFC-822 style numeric
<a name="line-122"></a> timezone (-0500) -}</span>
<a name="line-123"></a><span class='hs-definition'>parseCalendarTime</span> <span class='hs-keyglyph'>::</span>
<a name="line-124"></a> <span class='hs-conid'>TimeLocale</span> <span class='hs-comment'>-- ^ Time locale</span>
<a name="line-125"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Date format</span>
<a name="line-126"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ String to parse</span>
<a name="line-127"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-comment'>-- ^ 'Nothing' if parsing failed.</span>
<a name="line-128"></a><span class='hs-definition'>parseCalendarTime</span> <span class='hs-varid'>l</span> <span class='hs-varid'>fmt</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span>
<a name="line-129"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>parser</span> <span class='hs-varid'>epoch</span> <span class='hs-str'>"<date string>"</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-130"></a> <span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-131"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>p</span>
<a name="line-132"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pCalendarTime</span> <span class='hs-varid'>l</span> <span class='hs-varid'>fmt</span> <span class='hs-varop'>>></span> <span class='hs-varid'>getState</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="pCalendarTime"></a><span class='hs-comment'>-- FIXME: verify input</span>
<a name="line-135"></a><span class='hs-comment'>-- FIXME: years outside 1000-9999 probably don't work</span>
<a name="line-136"></a><span class='hs-comment'>-- FIXME: what about extra whitespace in input?</span>
<a name="line-137"></a><span class='hs-comment'>-- FIXME: set ctYDay</span>
<a name="line-138"></a><span class='hs-comment'>-- FIXME: set ctIsDST</span>
<a name="line-139"></a><span class='hs-comment'>-- FIXME: missing formats from GNU date(1):</span>
<a name="line-140"></a><span class='hs-comment'>-- %F same as %Y-%m-%d</span>
<a name="line-141"></a><span class='hs-comment'>-- %g the 2-digit year corresponding to the %V week number</span>
<a name="line-142"></a><span class='hs-comment'>-- %G the 4-digit year corresponding to the %V week number</span>
<a name="line-143"></a><span class='hs-comment'>-- %N nanoseconds (000000000..999999999)</span>
<a name="line-144"></a><span class='hs-comment'>-- %P locale's lower case am or pm indicator (blank in many locales)</span>
<a name="line-145"></a><span class='hs-comment'>-- %z RFC-822 style numeric timezone (-0500) (a nonstandard extension)</span>
<a name="line-146"></a><span class='hs-definition'>pCalendarTime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TimeLocale</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-147"></a><span class='hs-definition'>pCalendarTime</span> <span class='hs-varid'>l</span> <span class='hs-varid'>fmt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-varid'>fmt</span>
<a name="line-148"></a> <span class='hs-keyword'>where</span>
<a name="line-149"></a> <span class='hs-comment'>-- not padded</span>
<a name="line-150"></a> <span class='hs-comment'>-- FIXME: implement</span>
<a name="line-151"></a> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-chr'>'%'</span><span class='hs-conop'>:</span><span class='hs-chr'>'-'</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-chr'>'%'</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-152"></a> <span class='hs-comment'>-- space padded</span>
<a name="line-153"></a> <span class='hs-comment'>-- FIXME: implement</span>
<a name="line-154"></a> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-chr'>'%'</span><span class='hs-conop'>:</span><span class='hs-chr'>'_'</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-chr'>'%'</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-155"></a> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-chr'>'%'</span><span class='hs-conop'>:</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>decode</span> <span class='hs-varid'>c</span> <span class='hs-varop'>>></span> <span class='hs-varid'>doFmt</span> <span class='hs-varid'>cs</span>
<a name="line-156"></a> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>char</span> <span class='hs-varid'>c</span> <span class='hs-varop'>>></span> <span class='hs-varid'>doFmt</span> <span class='hs-varid'>cs</span>
<a name="line-157"></a> <span class='hs-varid'>doFmt</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-158"></a>
<a name="line-159"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'%'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'%'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-160"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'a'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseEnum</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>$</span> <span class='hs-varid'>wDays</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setWDay</span>
<a name="line-161"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'A'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseEnum</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>$</span> <span class='hs-varid'>wDays</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setWDay</span>
<a name="line-162"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'b'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseEnum</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>$</span> <span class='hs-varid'>months</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setMonth</span>
<a name="line-163"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'B'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseEnum</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>$</span> <span class='hs-varid'>months</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setMonth</span>
<a name="line-164"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'c'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-varid'>dateTimeFmt</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-165"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'C'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>updateYear</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span> <span class='hs-varop'>*</span> <span class='hs-num'>100</span> <span class='hs-varop'>+</span> <span class='hs-varid'>y</span> <span class='hs-varop'>`rem`</span> <span class='hs-num'>100</span><span class='hs-layout'>)</span>
<a name="line-166"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'d'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>day</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>day</span> <span class='hs-varop'>></span> <span class='hs-num'>31</span> <span class='hs-varop'>||</span> <span class='hs-varid'>day</span> <span class='hs-varop'><</span> <span class='hs-num'>1</span>
<a name="line-167"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid day "</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span>
<a name="line-168"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>setDay</span> <span class='hs-varid'>day</span>
<a name="line-169"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'D'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-str'>"%m/%d/%y"</span>
<a name="line-170"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'e'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setDay</span>
<a name="line-171"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>decode</span> <span class='hs-chr'>'b'</span>
<a name="line-172"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'H'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setHour</span>
<a name="line-173"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'I'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setHour12</span>
<a name="line-174"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'j'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read3</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setYDay</span>
<a name="line-175"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'k'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setHour</span>
<a name="line-176"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'l'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setHour12</span>
<a name="line-177"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'m'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>mon</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>mon</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>></span> <span class='hs-varid'>fromEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxBound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Month</span><span class='hs-layout'>)</span>
<a name="line-178"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid month "</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span>
<a name="line-179"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>setMonth</span> <span class='hs-layout'>(</span><span class='hs-varid'>toEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>mon</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-180"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'M'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setMin</span>
<a name="line-181"></a> <span class='hs-comment'>-- FIXME: strptime(3) accepts "arbitrary whitespace" for %n</span>
<a name="line-182"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'n'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'\n'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-183"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'p'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-184"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-varid'>am</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-varid'>pm</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span>
<a name="line-185"></a> <span class='hs-varid'>updateHour</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>h</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>+</span> <span class='hs-varid'>h</span> <span class='hs-varop'>`rem`</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span>
<a name="line-186"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>am</span><span class='hs-layout'>,</span><span class='hs-varid'>pm</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>amPm</span> <span class='hs-varid'>l</span>
<a name="line-187"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'r'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-varid'>time12Fmt</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-188"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'R'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-str'>"%H:%M"</span>
<a name="line-189"></a> <span class='hs-comment'>-- FIXME: implement %s.</span>
<a name="line-190"></a> <span class='hs-comment'>-- FIXME: implement %s in formatCalendarTime</span>
<a name="line-191"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'s'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>int</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-192"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setSec</span>
<a name="line-193"></a> <span class='hs-comment'>-- FIXME: strptime(3) accepts "arbitrary whitespace" for %t</span>
<a name="line-194"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'\t'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-195"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-str'>"%H:%M:%S"</span>
<a name="line-196"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'u'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readN</span> <span class='hs-num'>1</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setWDay</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toEnum</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-num'>7</span> <span class='hs-keyword'>then</span> <span class='hs-num'>0</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span>
<a name="line-197"></a> <span class='hs-comment'>-- FIXME: implement %U.</span>
<a name="line-198"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'U'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-199"></a> <span class='hs-comment'>-- FIXME: implement %V.</span>
<a name="line-200"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'V'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-201"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'w'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readN</span> <span class='hs-num'>1</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setWDay</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toEnum</span>
<a name="line-202"></a> <span class='hs-comment'>-- FIXME: implement %W.</span>
<a name="line-203"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'W'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-204"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'x'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-varid'>dateFmt</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-205"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'X'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doFmt</span> <span class='hs-layout'>(</span><span class='hs-varid'>timeFmt</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-206"></a> <span class='hs-comment'>-- FIXME: should probably be zero padded,</span>
<a name="line-207"></a> <span class='hs-comment'>-- need to change formatCalendarTime too</span>
<a name="line-208"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'Y'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>int</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setYear</span>
<a name="line-209"></a> <span class='hs-comment'>-- FIXME: maybe 04 should be 2004, not 1904?</span>
<a name="line-210"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'y'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>read2</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>updateYear</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varop'>`quot`</span> <span class='hs-num'>100</span><span class='hs-layout'>)</span> <span class='hs-varop'>*</span> <span class='hs-num'>100</span> <span class='hs-varop'>+</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-211"></a> <span class='hs-comment'>-- FIXME: are timezone names always [A-Z]+ ?</span>
<a name="line-212"></a> <span class='hs-comment'>-- FIXME: set ctTZ when parsing timezone name and</span>
<a name="line-213"></a> <span class='hs-comment'>-- ctTZName when parsing offset</span>
<a name="line-214"></a> <span class='hs-varid'>decode</span> <span class='hs-chr'>'Z'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tzname</span> <span class='hs-varop'><|></span> <span class='hs-varid'>tzoffset</span>
<a name="line-215"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>tzname</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>many1</span> <span class='hs-layout'>(</span><span class='hs-varid'>oneOf</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'Z'</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>setTZName</span>
<a name="line-216"></a> <span class='hs-varid'>tzoffset</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-217"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sign</span>
<a name="line-218"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>read2</span>
<a name="line-219"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>read2</span>
<a name="line-220"></a> <span class='hs-varid'>setTZ</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>*</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>*</span> <span class='hs-num'>3600</span> <span class='hs-varop'>+</span> <span class='hs-varid'>m</span> <span class='hs-varop'>*</span> <span class='hs-num'>60</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-221"></a> <span class='hs-comment'>-- following the example of strptime(3),</span>
<a name="line-222"></a> <span class='hs-comment'>-- whitespace matches zero or more whitespace</span>
<a name="line-223"></a> <span class='hs-comment'>-- characters in the input string</span>
<a name="line-224"></a> <span class='hs-varid'>decode</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>spaces</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-225"></a> <span class='hs-varid'>decode</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>char</span> <span class='hs-varid'>c</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-226"></a>
<a name="line-227"></a><a name="epoch"></a><span class='hs-definition'>epoch</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CalendarTime</span>
<a name="line-228"></a><span class='hs-definition'>epoch</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-layout'>{</span>
<a name="line-229"></a> <span class='hs-varid'>ctYear</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1970</span><span class='hs-layout'>,</span>
<a name="line-230"></a> <span class='hs-varid'>ctMonth</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>January</span><span class='hs-layout'>,</span>
<a name="line-231"></a> <span class='hs-varid'>ctDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span>
<a name="line-232"></a> <span class='hs-varid'>ctHour</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span>
<a name="line-233"></a> <span class='hs-varid'>ctMin</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span>
<a name="line-234"></a> <span class='hs-varid'>ctSec</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span>
<a name="line-235"></a> <span class='hs-varid'>ctPicosec</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span>
<a name="line-236"></a> <span class='hs-varid'>ctWDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Thursday</span><span class='hs-layout'>,</span>
<a name="line-237"></a> <span class='hs-varid'>ctYDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span>
<a name="line-238"></a> <span class='hs-varid'>ctTZName</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"UTC"</span><span class='hs-layout'>,</span>
<a name="line-239"></a> <span class='hs-varid'>ctTZ</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span><span class='hs-layout'>,</span>
<a name="line-240"></a> <span class='hs-varid'>ctIsDST</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-241"></a> <span class='hs-layout'>}</span>
<a name="line-242"></a>
<a name="line-243"></a><a name="parseEnum"></a><span class='hs-definition'>parseEnum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Enum</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-varid'>st</span> <span class='hs-varid'>a</span>
<a name="line-244"></a><span class='hs-definition'>parseEnum</span> <span class='hs-varid'>ss</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice</span> <span class='hs-layout'>(</span><span class='hs-varid'>zipWith</span> <span class='hs-varid'>tryString</span> <span class='hs-varid'>ss</span> <span class='hs-layout'>(</span><span class='hs-varid'>enumFrom</span> <span class='hs-layout'>(</span><span class='hs-varid'>toEnum</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-245"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>tryString</span> <span class='hs-varid'>s</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-246"></a>
<a name="line-247"></a><a name="setYear"></a><span class='hs-definition'>setYear</span><span class='hs-layout'>,</span><span class='hs-varid'>setDay</span><span class='hs-layout'>,</span><span class='hs-varid'>setHour</span><span class='hs-layout'>,</span><span class='hs-varid'>setHour12</span><span class='hs-layout'>,</span><span class='hs-varid'>setMin</span><span class='hs-layout'>,</span><span class='hs-varid'>setSec</span><span class='hs-layout'>,</span><span class='hs-varid'>setYDay</span><span class='hs-layout'>,</span><span class='hs-varid'>setTZ</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-248"></a><span class='hs-definition'>setYear</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctYear</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-249"></a><a name="setMonth"></a><span class='hs-definition'>setMonth</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Month</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-250"></a><span class='hs-definition'>setMonth</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctMonth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-251"></a><a name="setDay"></a><span class='hs-definition'>setDay</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-252"></a><a name="setHour"></a><span class='hs-definition'>setHour</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctHour</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-253"></a><a name="setMin"></a><span class='hs-definition'>setMin</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctMin</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-254"></a><a name="setSec"></a><span class='hs-definition'>setSec</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctSec</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-255"></a><a name="setWDay"></a><span class='hs-definition'>setWDay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-256"></a><span class='hs-definition'>setWDay</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctWDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-257"></a><a name="setYDay"></a><span class='hs-definition'>setYDay</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctYDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-258"></a><a name="setTZName"></a><span class='hs-definition'>setTZName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-259"></a><span class='hs-definition'>setTZName</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctTZName</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-260"></a><a name="setTZ"></a><span class='hs-definition'>setTZ</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctTZ</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-261"></a>
<a name="line-262"></a><a name="updateYear"></a><span class='hs-definition'>updateYear</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-263"></a><span class='hs-definition'>updateYear</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctYear</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>ctYear</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-264"></a><a name="updateHour"></a><span class='hs-definition'>updateHour</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-varid'>tok</span> <span class='hs-conid'>CalendarTime</span> <span class='hs-conid'>()</span>
<a name="line-265"></a><span class='hs-definition'>updateHour</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateState</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>{</span> <span class='hs-varid'>ctHour</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>ctHour</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a><a name="setHour12"></a><span class='hs-definition'>setHour12</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>updateHour</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>h</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>`quot`</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span> <span class='hs-varop'>*</span> <span class='hs-num'>12</span> <span class='hs-varop'>+</span> <span class='hs-varid'>from12</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-268"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>from12</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-num'>12</span> <span class='hs-keyword'>then</span> <span class='hs-num'>0</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>h</span>
<a name="line-269"></a>
<a name="line-270"></a><a name="read2"></a><span class='hs-definition'>read2</span><span class='hs-layout'>,</span> <span class='hs-varid'>read3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Int</span>
<a name="line-271"></a><span class='hs-definition'>read2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readN</span> <span class='hs-num'>2</span>
<a name="line-272"></a><a name="read3"></a><span class='hs-definition'>read3</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readN</span> <span class='hs-num'>3</span>
<a name="line-273"></a>
<a name="line-274"></a><a name="readN"></a><span class='hs-comment'>-- | Read up to a given number of digits, optionally left-padded</span>
<a name="line-275"></a><span class='hs-comment'>-- with whitespace and interpret them as an 'Int'.</span>
<a name="line-276"></a><span class='hs-definition'>readN</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Int</span>
<a name="line-277"></a><span class='hs-definition'>readN</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span>
<a name="line-278"></a> <span class='hs-varid'>liftM</span> <span class='hs-varid'>read</span> <span class='hs-layout'>(</span><span class='hs-varid'>spaces</span> <span class='hs-varop'>>></span> <span class='hs-varid'>choice</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>try</span> <span class='hs-layout'>(</span><span class='hs-varid'>count</span> <span class='hs-varid'>m</span> <span class='hs-varid'>digit</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-keyglyph'>..</span><span class='hs-num'>1</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-279"></a>
<a name="line-280"></a><a name="int"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Int</span>
<a name="line-281"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>read</span> <span class='hs-layout'>(</span><span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span><span class='hs-layout'>)</span>
<a name="line-282"></a>
<a name="line-283"></a><a name="sign"></a><span class='hs-definition'>sign</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Int</span>
<a name="line-284"></a><span class='hs-definition'>sign</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'+'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'-'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
</pre></body>
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