#!./perl
BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
    require './test.pl';    # for fresh_perl_is() etc
    require './loc_tools.pl'; # to find locales
}

use strict;

########
# These tests are here instead of lib/locale.t because
# some bugs depend on in the internal state of the locale
# settings and pragma/locale messes up that state pretty badly.
# We need "fresh runs".
BEGIN {
    eval { require POSIX; POSIX->import("locale_h") };
    if ($@) {
	skip_all("could not load the POSIX module"); # running minitest?
    }
}
use Config;
my $have_strtod = $Config{d_strtod} eq 'define';
my @locales = eval { find_locales( [ &LC_ALL, &LC_CTYPE, &LC_NUMERIC ] ) };
skip_all("no locales available") unless @locales;

plan tests => &last;
fresh_perl_is("for (qw(@locales)) {\n" . <<'EOF',
    use POSIX qw(locale_h);
    use locale;
    setlocale(LC_NUMERIC, "$_") or next;
    my $s = sprintf "%g %g", 3.1, 3.1;
    next if $s eq '3.1 3.1' || $s =~ /^(3.+1) \1$/;
    print "$_ $s\n";
}
EOF
    "", {}, "no locales where LC_NUMERIC breaks");

{
    local $ENV{LC_NUMERIC}; # So not taken as a default
    local $ENV{LC_ALL}; # so it never overrides LC_NUMERIC
    local $ENV{LANG};   # So not taken as a default
    fresh_perl_is("for (qw(@locales)) {\n" . <<'EOF',
        use POSIX qw(locale_h);
        use locale;
        my $in = 4.2;
        my $s = sprintf "%g", $in; # avoid any constant folding bugs
        next if $s eq "4.2";
        print "$_ $s\n";
    }
EOF
    "", {}, "LC_NUMERIC without environment nor setlocale() has no effect in any locale");
}

# try to find out a locale where LC_NUMERIC makes a difference
my $original_locale = setlocale(LC_NUMERIC);

my ($base, $different, $comma, $difference);
for ("C", @locales) { # prefer C for the base if available
    BEGIN {
        if($Config{d_setlocale}) {
            require locale; import locale;
        }
    }
    setlocale(LC_NUMERIC, $_) or next;
    my $in = 4.2; # avoid any constant folding bugs
    if ((my $s = sprintf("%g", $in)) eq "4.2")  {
	$base ||= $_;
    } else {
	$different ||= $_;
	$difference ||= $s;
        $comma ||= $_ if localeconv()->{decimal_point} eq ',';
    }

    last if $base && $different && $comma;
}
setlocale(LC_NUMERIC, $original_locale);

SKIP: {
    skip("no locale available where LC_NUMERIC makes a difference", &last - 4 )
	if !$different;     # -4 is 2 tests before this block; 2 after
    note("using the '$different' locale for LC_NUMERIC tests");
    for ($different) {
	local $ENV{LC_NUMERIC} = $_;
	local $ENV{LC_ALL}; # so it never overrides LC_NUMERIC

	fresh_perl_is(<<'EOF', "4.2", {},
format STDOUT =
@.#
4.179
.
write;
EOF
	    "format() does not look at LC_NUMERIC without 'use locale'");

        {
	    fresh_perl_is(<<'EOF', $difference, {},
use locale;
format STDOUT =
@.#
4.179
.
write;
EOF
	    "format() looks at LC_NUMERIC with 'use locale'");
        }

        {
	    fresh_perl_is(<<'EOF', $difference, {},
use locale ":not_characters";
format STDOUT =
@.#
4.179
.
write;
EOF
	    "format() looks at LC_NUMERIC with 'use locale \":not_characters\"'");
        }

        {
	    fresh_perl_is(<<'EOF', "4.2", {},
format STDOUT =
@.#
4.179
.
{ require locale; import locale; write; }
EOF
	    "too late to look at the locale at write() time");
        }

        {
	    fresh_perl_is(<<'EOF', $difference, {},
use locale;
format STDOUT =
@.#
4.179
.
{ no locale; write; }
EOF
	    "too late to ignore the locale at write() time");
        }
    }

    {
        # do not let "use 5.000" affect the locale!
        # this test is to prevent regression of [rt.perl.org #105784]
        fresh_perl_is(<<"EOF",
            BEGIN {
                if("$Config{d_setlocale}") {
                    require locale; import locale;
                }
            }
            use POSIX;
            my \$i = 0.123;
            POSIX::setlocale(POSIX::LC_NUMERIC(),"$different");
            \$a = sprintf("%.2f", \$i);
            require version;
            \$b = sprintf("%.2f", \$i);
            print ".\$a \$b" unless \$a eq \$b
EOF
            "", {}, "version does not clobber version");

        fresh_perl_is(<<"EOF",
            use locale;
            use POSIX;
            my \$i = 0.123;
            POSIX::setlocale(POSIX::LC_NUMERIC(),"$different");
            \$a = sprintf("%.2f", \$i);
            eval "use v5.0.0";
            \$b = sprintf("%.2f", \$i);
            print "\$a \$b" unless \$a eq \$b
EOF
            "", {}, "version does not clobber version (via eval)");
    }

    for ($different) {
	local $ENV{LC_NUMERIC} = $_;
	local $ENV{LC_ALL}; # so it never overrides LC_NUMERIC
	fresh_perl_is(<<'EOF', "$difference "x4, {},
            use locale;
	    use POSIX qw(locale_h);
	    setlocale(LC_NUMERIC, "");
	    my $in = 4.2;
	    printf("%g %g %s %s ", $in, 4.2, sprintf("%g", $in), sprintf("%g", 4.2));
EOF
	"sprintf() and printf() look at LC_NUMERIC regardless of constant folding");
    }

    for ($different) {
	local $ENV{LC_NUMERIC} = $_;
	local $ENV{LC_ALL}; # so it never overrides LC_NUMERIC
	local $ENV{LANG};   # so on Windows gets sys default locale
	fresh_perl_is(<<'EOF', "$difference "x4, {},
            use locale;
	    use POSIX qw(locale_h);
	    setlocale(LC_NUMERIC, "");
	    my $in = 4.2;
	    printf("%g %g %s %s ", $in, 4.2, sprintf("%g", $in), sprintf("%g", 4.2));
EOF
	"Uses the above test to verify that on Windows the system default locale has lower priority than LC_NUMERIC");
    }

    for ($different) {
        local $ENV{LC_ALL} = "invalid";
	local $ENV{LC_NUMERIC} = "invalid";
        local $ENV{LANG} = $_;

        # Can't turn off the warnings, so send them to /dev/null
        fresh_perl_is(<<'EOF', "$difference", { stderr => "devnull" },
        use locale;
            use POSIX qw(locale_h);
            setlocale(LC_NUMERIC, "");
            my $in = 4.2;
            printf("%g", $in);
EOF
        "LANG is used if LC_ALL, LC_NUMERIC are invalid");
    }

    SKIP: {
        if ($^O eq 'MSWin32') {
            skip("Win32 uses system default locale in preference to \"C\"", 1);
        }
        else {
            for ($different) {
                local $ENV{LC_ALL} = "invalid";
                local $ENV{LC_NUMERIC} = "invalid";
                local $ENV{LANG} = "invalid";

                # Can't turn off the warnings, so send them to /dev/null
                fresh_perl_is(<<'EOF', 4.2, { stderr => "devnull" },
                use locale;
                    use POSIX qw(locale_h);
                    setlocale(LC_NUMERIC, "");
                    my $in = 4.2;
                    printf("%g", $in);
EOF
                'C locale is used if LC_ALL, LC_NUMERIC, LANG are invalid');
            }
        }
    }

    for ($different) {
	local $ENV{LC_NUMERIC} = $_;
	local $ENV{LC_ALL}; # so it never overrides LC_NUMERIC
	fresh_perl_is(<<"EOF",
	    use POSIX qw(locale_h);

            BEGIN { setlocale(LC_NUMERIC, \"$_\"); };
            setlocale(LC_ALL, "C");
            use 5.008;
            print setlocale(LC_NUMERIC);
EOF
	 "C", { },
         "No compile error on v-strings when setting the locale to non-dot radix at compile time when default environment has non-dot radix");
    }

    unless ($comma) {
        skip("no locale available where LC_NUMERIC is a comma", 3);
    }
    else {

        fresh_perl_is(<<"EOF",
            my \$i = 1.5;
            {
                use locale;
                use POSIX;
                POSIX::setlocale(POSIX::LC_NUMERIC(),"$comma");
                print \$i, "\n";
            }
            print \$i, "\n";
EOF
            "1,5\n1.5", {}, "Radix print properly in locale scope, and without");

        fresh_perl_is(<<"EOF",
            my \$i = 1.5;   # Should be exactly representable as a base 2
                            # fraction, so can use 'eq' below
            use locale;
            use POSIX;
            POSIX::setlocale(POSIX::LC_NUMERIC(),"$comma");
            print \$i, "\n";
            \$i += 1;
            print \$i, "\n";
EOF
            "1,5\n2,5", {}, "Can do math when radix is a comma"); # [perl 115800]

        unless ($have_strtod) {
            skip("no strtod()", 1);
        }
        else {
            fresh_perl_is(<<"EOF",
                use POSIX;
                POSIX::setlocale(POSIX::LC_NUMERIC(),"$comma");
                my \$one_point_5 = POSIX::strtod("1,5");
                \$one_point_5 =~ s/0+\$//;  # Remove any trailing zeros
                print \$one_point_5, "\n";
EOF
            "1.5", {}, "POSIX::strtod() uses underlying locale");
        }
    }
} # SKIP

    {
        fresh_perl_is(<<"EOF",
                use locale;
                use POSIX;
                POSIX::setlocale(POSIX::LC_CTYPE(),"C");
                print "h" =~ /[g\\w]/i || 0;
                print "\\n";
EOF
            1, {}, "/il matching of [bracketed] doesn't skip POSIX class if fails individ char");
    }

    {
        fresh_perl_is(<<"EOF",
                use locale;
                use POSIX;
                POSIX::setlocale(POSIX::LC_CTYPE(),"C");
                print "0" =~ /[\\d[:punct:]]/l || 0;
                print "\\n";
EOF
            1, {}, "/l matching of [bracketed] doesn't skip non-first POSIX class");

    }

sub last { 19 }
