#!/usr/bin/perl

#======================================================================

#                    A N T S U T I L S . P L 

#                    doc: Fri Jun 19 23:25:50 1998

#                    dlm: Fri Apr  5 16:21:54 2019

#                    (c) 1998 A.M. Thurnherr

#                    uE-Info: 106 55 NIL 0 0 70 10 2 4 NIL ofnI

#======================================================================

# Miscellaneous auxillary functions

# HISTORY:

#	Mar 08, 1999: - added &antsFunUsage()

#	Mar 20, 1999: - added &fnr()

#				  - BUG &numberp() returned TRUE on "sigma2"

#	Mar 21, 1999: - added semantics of &antsFunUsage() to specify min

#					args on negative number

#	Mar 22, 1999: - added round(); NB: there's a BUG:

#					int(2.155*10**2+0.5)/100 returns 215!!!

#	Jul 31, 1999: - added &cardinalp() and plugged into &fnr()

#				  - change &numberp() to conform with &antsFloatArg()

#	Sep 13, 1999: - added &SQR()

#				  - removed "" from valid numbers

#	Sep 18, 1999: - added &integerp()

#				  - added typechecking to &antsFunUsage()

#	Sep 20, 1999: - cosmetics

#	Aug 24, 2000: - added #include directive to Description files

#				  - added stringlengths to &antsFunUsage()

#	Aug 28, 2000: - added str2num to remove leading 0es & lead/trail spcs

#				  - changed opt_P to opt_A

#	Aug 29, 2000: - added &antsRequireParam()

#	Sep 01, 2000: - added prefix as 2nd arg to #include directive

#				  - disallow <> in #include directive

#				  - debugged &str2num()

#	Sep 03, 2000: - allowed for %param to pass through fnr w/o error check

#	Sep 05, 2000: - str2num always kills leading/trailing spaces

#	Sep 19, 2000: - added interpretation to ./ to #include

#				  - inherit prefix for chained inclusion (do not chain, however)

#	Nov 25, 2000: - backslashed leading + in regexp to increase portability

#	May 29, 2001: - adapted &antsNumbers() to handle %PARAMs

#				  - added &antsVal()

#	Jul  6, 2001: - added degree notation to str2num()

#	Jul 12, 2001: - made $# notation 1-relative (awk, shell)

#	Jul 15, 2001: - added field name to Description open error

#	Jul 16, 2001: - added &localFnr()

#	Jul 19, 2001: - added &croak()

#	Aug  1, 2001: - BUG: numberp() returned false on "-.360"

#	May  7, 2002: - BUG: numberp() returned true on "."

#	Mar  8, 2003: - changed Description to Layout

#   Dec  7, 2005: - antsFName -> antsLayout (not tested)

#	Dec  8, 2005: - Version 3.2 (see [HISTORY])

#	Dec 12, 2005: - BUG: &outFnr() was broken

#				  - BUG: [Layout] overrode local #FIELDS#

#   Dec 23, 2005: - replaced defined(@array) (c.f. perlfunc(1))

#	Jan  2, 2006: - changed numberp to allow for multiple args

#				  - changed right back

#	Jan  9, 2006: - BUG: fnrNoErr() had not increased $antsBufNFields on

#					     import of an externally defined field

#	Jan 10, 2006: - added &antsLoadModel()

#	Jan 12, 2006: - removed -A support

#	Jan 13: 2006: - BUG: str2num(3.00) did not yield 3

#	Jul  1, 2006: - added isNaN (from perlfunc(1))

#				  - changed numberp() according to perldata(1)

#	Jul 24, 2006: - added $PRACTICALLY_ZERO, &equal()

#	Aug 23, 2006: - improved model loading (& added model w. params)

#	Aug 24, 2006: - made 2nd argument of round() optional

#				  - added frac()

#	May 11, 2007: - added Floor(), Ceil()

#	Oct 17, 2007: - added default field names (w. caching) to &antsFunUsage()

#	Oct 18, 2007: - added support for optional parameters

#	Oct 19, 2007: - generalized antsFunUsage to allow default %PARAMs

#				  - BUG: make sure usage is printed in abc when called with

#						 wrong # of args

#	Nov 14, 2007: - made optional arguments to round, Floor, Ceil more intuitive

#	Dec 19, 2007: - added &numbersp()

#	Mar  2, 2008: - adapted fnr to partial matches

#	Mar  4, 2008: - added $antsFnrExactMatch flag

#				  - BUG: couldn't select f1 if there is also an f10

#	Mar 26, 2008: - BUG: abbreviated field names were imported from external

#						 Layout

#	Mar 27, 2008: - added %pi

#	Mar 28, 2008: - move %pi to [argtest]; when set here filediff -e bombs

#	Apr 15, 2008: - added &log10()

#	Apr 16, 2008: - MAJOR CHANGE: suppress croak() STDOUT error output on -Q

#	Apr 29, 2008: - added &ismember()

#	Jun 11, 2008: - adder perl 5.8.8 bug workaround (0*-0.1 = -0)

#	Nov 12, 2008: - added opt_T

#	Mar 21, 2009: - added debug()

#	Nov 17, 2009: - added listAllRecs flag for list(1)

#	May 12, 2010: - BUG: round() did not work correctly for -ve numbers

#	May 21, 2011: - added support for $antsFnrNegativeOk

#	Nov 11, 2011: - added exact flag to fnrNoErr()

#	Feb 13, 2012: - BUG: failure to specify exact flag resulted in ignoring antsFnrExactMatch

#				  - BUG: fnrNoErr disregarded exact flag for external layouts

#	May 16, 2012: - adapted to V5.0

#	May 31, 2012: - changed ismember() semantics for use in psSamp

#	Jun 12, 2012: - added &compactList()

#	Dec 17, 2012: - added default to antsLoadModel()

#	Sep  5, 2013: - FINALLY: added $pi

#	May 23, 2014: - made ismember understand "123,1-10"

#	Jul 22, 2014: - removed support for antsFnrNegativeOk

#	May 18, 2015: - added antsFindParam()

#	Jun 21, 2015: - added antsParam(), modified antsRequireParam()

#	May 12, 2016: - added &div2() to prevent division by zero errors

#	Apr  5, 2019: - disabled weird line of code in antsFunUsage() (see comment)

#				  - improved error messages in antsFunUsage()

#				  - BUG: antsFunUsage did not work with -ve argc (variable argument funs)

#	Aug 30, 2019: - BUG: antsLoadModel() did not respect $ANTS

# fnr notes:

#	- matches field names starting with the string given, i.e. "sig" is

#     really "^sig"

#	- if exact match is desired, a $ can be appended to the field name

#	- following regexp meta chars are auto-quoted: .

#----------------------------------------------------------------------

# Flags

#----------------------------------------------------------------------

$antsFnrExactMatch = 0;				# set to force exact match, e.g. for antsNewField* [antsutils.pl]

#----------------------------------------------------------------------

# Error-Exit

#----------------------------------------------------------------------

sub croak($)

{

	print("#ANTS#ERROR# @_[0]") unless (-t 1 || $opt_Q);

	die(@_[0]);

}

#----------------------------------------------------------------------

# Number-related funs

#----------------------------------------------------------------------

$pi = 3.14159265358979;		# from $PI in [libvec.pl]

$PRACTICALLY_ZERO = 1e-9;

$SMALL_AMOUNT	  = 1e-6;

sub numberp(@)

{ return  $_[0] =~ /^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/; }

sub numbersp(@)

{

	foreach my $n (@_) {

		return undef unless numberp($n);

	}

	return 1;

}

sub equal($$)

{ return (@_ >= 2) && (abs($_[0]-$_[1]) < $PRACTICALLY_ZERO); }

sub div2($$)

{ return $_[1] ? $_[0]/$_[1] : inf; }

#----------------------------------------------------------------------

# check whether given val is member of a set

#	- set can either be an array or a comma-separated string

#----------------------------------------------------------------------

sub ismember($@)

{

	my($val,@set) = @_;

	@set = split(',',$set[0])

		if (@set == 1 && !numberp($set[0]));

	for (my($i)=0; $i<@set; $i++) {

		if (numberp($val) && numberp($set[$i])) {

			return 1 if ($val == $set[$i]);

		} elsif (numberp($val) && ($set[$i] =~ m{-}) && numberp($`) && numberp($')) {

			return 1 if (ismember($val,$`..$'));

		} else {

			return 1 if ($val eq $set[$i]);

		}

	}

	return undef;

}

sub isnan($) # perlfunc(1)

{ return $_[0] != $_[0]; }

sub cardinalp($)

{ return $_[0] =~ /^\+?\d+$/; }

sub integerp($)

{ return $_[0] =~ /^[+-]?\d+$/; }

sub antsNumbers(@)

{

	my($n);

	foreach $n (@_) {

		return 0 unless (&numberp(&antsVal($n)));

	}

	return 1;

}

sub round(@)

{

	my($accuracy) = defined($_[1]) ? $_[1] : 1;

	return $_[0] >= 0 ? int($_[0] / $accuracy + 0.5) * $accuracy

					  : int($_[0] / $accuracy - 0.5) * $accuracy;

}

sub Ceil(@)

{

	my($accuracy) = defined($_[1]) ? $_[1] : 1;

	return int($_[0]/$accuracy + 1 - $PRACTICALLY_ZERO) * $accuracy;

}

sub Floor(@)

{

	my($accuracy) = defined($_[1]) ? $_[1] : 1;

	return int($_[0]/$accuracy) * $accuracy;

}

sub frac($) { return $_[0] - int($_[0]); }

sub SQR($) { return $_[0] * $_[0]; }

sub str2num($)

{

	my($num) = @_;

	$num =~ s/^\s*//;					# kill leading spaces

	$num =~ s/\s*$//;					# kill trailing spaces

	$num = (substr($1,0,1) eq '-') ? $1-$2/60 : $1+$2/60	# degrees

		if ($num =~ /^([+-]?\d*):(\d*\.?\d*)$/);

	return $num unless (numberp($num));

	$num =~ s/^(-?)0*/\1/;				# kill leading 0es

	$num =~ s/(\.\d*[1-9])0*$/\1/;		# kill trailing fractional 0es

	$num =~ s/^\./0./;					# ensure digit before decimal pnt

	$num =~ s/^-\./-0./;				# ditto

	$num =~ s/\.$/.0/;					# ensure digit after decimal pnt

	$num =~ s/^-0(\.0?)$/0/;			# 0 is positive

	$num =~ s/\.0+$//;					# kill trailing fractional 0es

	return ($num eq "") ? 0 : $num;

}

sub fmtNum($$)							# format number for output

{

	my($num,$fname) = @_;

	$num = 0 if ($num eq '-0');			# perl 5.8.8: 0*-0.1 = -0, which is 

										# not handled correctly by all progs

	$num = str2num($num) if ($opt_C);

	if ($opt_G && numberp($num)) {

		$num = sprintf("%d:%04.1f%s",

						abs(int($num)),

						(abs($num)-abs(int($num)))*60,

						$num>=0 ? "N" : "S")

			if (lc($fname) =~ /lat/);

		$num = sprintf("%d:%04.1f%s",

						abs(int($num)),

						(abs($num)-abs(int($num)))*60,

						$num>=0 ? "E" : "W")

			if (lc($fname) =~ /lon/);

	}

	if ($opt_T && numberp($num)) {

		$num = sprintf("\\lat%s{%d}{%04.1f}",

						$num>=0 ? "N" : "S",

						abs(int($num)),

						(abs($num)-abs(int($num)))*60)

			if (lc($fname) =~ /lat/);

		$num = sprintf("\\lon%s{%d}{%04.1f}",

						$num>=0 ? "E" : "W",

						abs(int($num)),

						(abs($num)-abs(int($num)))*60)

			if (lc($fname) =~ /lon/);

	}

	$num = sprintf($opt_M,$num)

        if defined($opt_M) && numberp($num);

    return $num;

}

sub log10 { my $n = shift; return ($n>0) ? log($n)/log(10) : nan; }	# c.v. perlfunc(1)

#----------------------------------------------------------------------

# Layout-related funs

#----------------------------------------------------------------------

sub fname_match($$)									# modified regexp match

{

	my($pat,$trg) = @_;

	return ($pat eq $trg) if ($antsFnrExactMatch);	# exact match (pre 3.4 behavior)

#	print(STDERR "pattern: $pat -> ");

	$pat =~ s/\./\\\./g;							# may want more of these

	$pat =~ s/^/\^/;

#	print(STDERR "$pat\n");

	return $trg =~ /$pat/;

}

sub fnrInFile(...)

{

	my($fname,$file,$pref,$found) = @_;

	my($fullName);

	local(*D);

	open(D,$file) || return (undef,$fname);

	while (<D>) {

		s/\s\b/ $pref/g	if m/^#\d+/;

		my(@fn) = split;

		if (/^#\s*include\s*([^\s]+)\s*([^\s]+)?/) {

			my($npref) = ($2 eq "") ? $pref : $2;

			if (substr($1,0,2) eq "./") {

				my($dirname) = $file;

				$file = $1;

				$dirname =~ s@[^/]+$@@;

				$file = $dirname . $file;

			} else {

				$file = $1;

			}

			($found,$fullName) = &fnrInFile($fname,$file,$npref,$found);

		}

		next unless ($fn[0] =~ /^#\d+$/);

		for (my($i)=1; $i<=$#fn; $i++) {

			close(D),return ($1,$fname)

				if (/^#(\d+)\b.*\b$fname\b/);

		}

		for (my($i)=1; $i<=$#fn; $i++) {

			next unless fname_match($fname,$fn[$i]);

			croak("$0: $fname matches multiple fields in Layout files\n")

				if defined($found);

			$fullName = $fn[$i];

			($found) = ($fn[0] =~ /^#(\d+)/);

		}

    }

    close(D);

	return ($found,$fullName);

}

sub localFnr($@)

{

	my($fnm,@layout) = @_;

	my($i,$fnr);

#	print(STDERR "finding $fnm...\n");

	croak("$0: illegal 0-length field name\n")

		if ($fnm eq "");

	return $fnm if ($fnm =~ /^%/);

	if ($fnm =~ /^\$/) {

		croak("$0: invalid field identifier \$$'\n")

			unless (cardinalp($'));

		return $' - 1;

	}

	my($i,$found);

	if (@layout) {

		for ($i=0; $i<=$#layout; $i++) {

			return $i if ($layout[$i] eq $fnm);

	    }

		for ($i=0; $i<=$#layout; $i++) {

			next unless fname_match($fnm,$layout[$i]);

			croak("$0: $fnm matches multiple fields ($layout[$found],$layout[$i],...)\n")

				if defined($found);

			$found = $i;

	    }

	} else {

		for ($i=0; $i<=$#antsLayout; $i++) {

			return $i if ($antsLayout[$i] eq $fnm);

	    }

		for ($i=0; $i<=$#antsLayout; $i++) {

			next unless fname_match($fnm,$antsLayout[$i]);

			croak("$0: $fnm matches multiple fields ($antsLayout[$found],$antsLayout[$i],...)\n")

				if defined($found);

			$found = $i;

	    }

	}

	return $found;

}

sub fnrNoErr($)

{

	my($fnm,$exact) = @_;

	my($tmp) = $antsFnrExactMatch;

	$antsFnrExactMatch = $exact if defined($exact);

	my($fnr) = &localFnr($fnm);

	$antsFnrExactMatch = $tmp;

	my($fullName);

	return $fnr if defined($fnr); 						# internal layout

	my($tmp) = $antsFnrExactMatch;

	$antsFnrExactMatch = $exact if defined($exact);

	($fnr,$fullName) = &fnrInFile($fnm,"Layout","");	# external [Layout]

	$antsFnrExactMatch = $tmp;

    return undef unless defined($fnr);

    return undef										# [Layout] cannod override

		if (defined($antsLayout[$fnr]) &&				# local definition

			!fname_match($fnm,$antsLayout[$fnr]));

	$antsLayout[$fnr] = $fullName if defined($fullName);# found -> add to local

	$antsBufNFields = $fnr+1							# can happen on externally

		if ($antsBufNFields < $fnr+1);					# ... defined fields

	return($fnr);

}

sub fnr(@)

{

	my(@fnm) = @_;

	my($f,@fnr);

	for ($f=0; $f<=$#fnm; $f++) {

		$fnr[$f] = &fnrNoErr($fnm[$f]);

		next if defined($fnr[$f]);						# normal case -> done

	    croak("$0: Unknown field $fnm[$f]\n")

	    	unless defined($fnr[$f]);

    }

	return(@fnr>1 ? @fnr : $fnr[0]);

}

# fnr()-equivalent but checks in output format

#	- only used for -F processing => single argument only

sub outFnr($)

{

	my($fnm) = @_;

	my($f,$fnr,$fullName);

	$fnr = &localFnr($fnm,@antsNewLayout);

	return $fnr if defined($fnr); 					# normal case -> done

	($fnr,$fullName)  = &fnrInFile($fnm,"Layout","");	# look in [Layout]

	croak("$0: Unknown field $fnm\n")

		unless defined($fnr);

	$antsNewLayout[$fnr] = $fullName;

	return $fnr;

}

#----------------------------------------------------------------------

# model-loading funs

#----------------------------------------------------------------------

sub antsLoadModel(...)

{

	my($opt,$pref,$default) = @_;

	my($name);

	for ($a=0;											# find model name

		 $a<=$#ARGV && !($ARGV[$a] =~ m/^-\S*$opt$/);

		 $a++) { }

	$name = ($a < $#ARGV) ? $ARGV[$a+1] : $default;		# use default if not found

	return undef unless defined($name);

	if (-r "$pref.$name") { 							# load in local directory

		&antsInfo("loading local $pref.$name...");

		require "$pref.$name";

		return $name;

	} else {											# load from ANTSlib 

		require "$ANTS/$pref.$name";

		return $name;

    }

}

sub antsLoadModelWithArgs($$)

{

	my($opt,$pref) = @_;

	for ($a=0;											# find model name

		 $a<=$#ARGV && !($ARGV[$a] =~ m/^-\S*$opt$/);

		 $a++) { }

	if ($a < $#ARGV) {									# found

		my($name,$args) = ($ARGV[$a+1] =~ /([^\(]+)\(([^\)]*)\)$/);

		$name = $ARGV[$a+1] unless defined($name);

		if (-r "$pref.$name") {							# local

			&antsInfo("loading local $pref.$name...");

			require "$pref.$name";

			return ($name,split(',',$args));

		} else {

			require "$ANTS/$pref.$name";

			return ($name,split(',',$args));

		}

	}

	return undef;

}

#----------------------------------------------------------------------

# deal with lists of numbers

#----------------------------------------------------------------------

sub compactList(@)

{

	my(@out);

	my($seqStart);

	my($lv) = -9e99;

	foreach my $v (@_) {

		if (numberp($v)) {

			if ($v == $lv+1) {						# we're in a sequence

				$seqStart = $lv						# record beginning value

					unless defined($seqStart);

			} elsif (defined($seqStart)) {			# we've just completed a sequence

				pop(@out);

				push(@out,"$seqStart-$lv");

				push(@out,$v);

				undef($seqStart);

			} else {								# not in a sequence

				push(@out,$v);

			}

			$lv = $v;

		} else {

			push(@out,$v);

			$lv = -9e99;

		}

	}

	if (defined($seqStart)) {						# list ends with a sequence

		pop(@out);

		push(@out,"$seqStart-$lv");					

	}

	return @out;

}

#----------------------------------------------------------------------

# Misc funs

#----------------------------------------------------------------------