################################################################################
##
##  Copyright (C) 2017, Pali <pali@cpan.org>
##
##  This program is free software; you can redistribute it and/or
##  modify it under the same terms as Perl itself.
##
################################################################################

=provides

croak_sv
die_sv
mess_sv
warn_sv

vmess
mess_nocontext
mess

warn_nocontext

croak_nocontext

croak_no_modify
Perl_croak_no_modify

croak_memory_wrap
croak_xs_usage

PERL_ARGS_ASSERT_CROAK_XS_USAGE

=dontwarn

NEED_mess
NEED_mess_nocontext
NEED_vmess
_dppp_fix_utf8_errsv

=implementation

#ifdef NEED_mess_sv
#define NEED_mess
#endif

#ifdef NEED_mess
#define NEED_mess_nocontext
#define NEED_vmess
#endif

#ifndef croak_sv
#if { VERSION >= 5.7.3 } || ( { VERSION >= 5.6.1 } && { VERSION < 5.7.0 } )
#  if ( { VERSION >= 5.8.0 } && { VERSION < 5.8.9 } ) || ( { VERSION >= 5.9.0 } && { VERSION < 5.10.1 } )
#    define _dppp_fix_utf8_errsv(errsv, sv)                     \
        STMT_START {                                            \
            if (sv != ERRSV)                                    \
                SvFLAGS(ERRSV) = (SvFLAGS(ERRSV) & ~SVf_UTF8) | \
                                 (SvFLAGS(sv) & SVf_UTF8);      \
        } STMT_END
#  else
#    define _dppp_fix_utf8_errsv(errsv, sv) STMT_START {} STMT_END
#  endif
#  define croak_sv(sv)                        \
    STMT_START {                              \
        if (SvROK(sv)) {                      \
            sv_setsv(ERRSV, sv);              \
            croak(NULL);                      \
        } else {                              \
            _dppp_fix_utf8_errsv(ERRSV, sv);  \
            croak("%" SVf, SVfARG(sv));       \
        }                                     \
    } STMT_END
#elif { VERSION >= 5.4.0 }
#  define croak_sv(sv) croak("%" SVf, SVfARG(sv))
#else
#  define croak_sv(sv) croak("%s", SvPV_nolen(sv))
#endif
#endif

#ifndef die_sv
#if { NEED die_sv }
OP *
die_sv(pTHX_ SV *sv)
{
    croak_sv(sv);
    return (OP *)NULL;
}
#endif
#endif

#ifndef warn_sv
#if { VERSION >= 5.4.0 }
#  define warn_sv(sv) warn("%" SVf, SVfARG(sv))
#else
#  define warn_sv(sv) warn("%s", SvPV_nolen(sv))
#endif
#endif

#ifndef vmess
#if { NEED vmess }
SV*
vmess(pTHX_ const char* pat, va_list* args)
{
    mess(pat, args);
    return PL_mess_sv;
}
#endif
#endif

#if { VERSION < 5.6.0 }
#undef mess
#endif

#if !defined(mess_nocontext) && !defined(Perl_mess_nocontext)
#if { NEED mess_nocontext }
SV*
mess_nocontext(const char* pat, ...)
{
    dTHX;
    SV *sv;
    va_list args;
    va_start(args, pat);
    sv = vmess(pat, &args);
    va_end(args);
    return sv;
}
#endif
#endif

#ifndef mess
#if { NEED mess }
SV*
mess(pTHX_ const char* pat, ...)
{
    SV *sv;
    va_list args;
    va_start(args, pat);
    sv = vmess(pat, &args);
    va_end(args);
    return sv;
}
#ifdef mess_nocontext
#define mess mess_nocontext
#else
#define mess Perl_mess_nocontext
#endif
#endif
#endif

#ifndef mess_sv
#if { NEED mess_sv }
SV *
mess_sv(pTHX_ SV *basemsg, bool consume)
{
    SV *tmp;
    SV *ret;

    if (SvPOK(basemsg) && SvCUR(basemsg) && *(SvEND(basemsg)-1) == '\n') {
        if (consume)
            return basemsg;
        ret = mess("");
        SvSetSV_nosteal(ret, basemsg);
        return ret;
    }

    if (consume) {
        sv_catsv(basemsg, mess(""));
        return basemsg;
    }

    ret = mess("");
    tmp = newSVsv(ret);
    SvSetSV_nosteal(ret, basemsg);
    sv_catsv(ret, tmp);
    sv_dec(tmp);
    return ret;
}
#endif
#endif

#ifndef warn_nocontext
#define warn_nocontext warn
#endif

#ifndef croak_nocontext
#define croak_nocontext croak
#endif

#ifndef croak_no_modify
#define croak_no_modify() croak("%s", PL_no_modify)
#define Perl_croak_no_modify() croak_no_modify()
#endif

#ifndef croak_memory_wrap
#if { VERSION >= 5.9.2 } || ( { VERSION >= 5.8.6 } && { VERSION < 5.9.0 } )
#  define croak_memory_wrap() croak("%s", PL_memory_wrap)
#else
#  define croak_memory_wrap() croak("panic: memory wrap")
#endif
#endif

#ifndef PERL_ARGS_ASSERT_CROAK_XS_USAGE
#define PERL_ARGS_ASSERT_CROAK_XS_USAGE assert(cv); assert(params)
#endif

#ifndef croak_xs_usage
#if { NEED croak_xs_usage }
void
croak_xs_usage(pTHX_ const CV *const cv, const char *const params)
{
    const GV *const gv = CvGV(cv);

    PERL_ARGS_ASSERT_CROAK_XS_USAGE;

    if (gv) {
        const char *const gvname = GvNAME(gv);
        const HV *const stash = GvSTASH(gv);
        const char *const hvname = stash ? HvNAME(stash) : NULL;

        if (hvname)
            croak("Usage: %s::%s(%s)", hvname, gvname, params);
        else
            croak("Usage: %s(%s)", gvname, params);
    } else {
        /* Pants. I don't think that it should be possible to get here. */
        croak("Usage: CODE(0x%" UVxf ")(%s)", PTR2UV(cv), params);
    }
}
#endif
#endif

=xsinit

#define NEED_die_sv
#define NEED_mess_sv
#define NEED_croak_xs_usage

=xsubs

void
croak_sv(sv)
    SV *sv
CODE:
    croak_sv(sv);

void
die_sv(sv)
    SV *sv
CODE:
    (void)die_sv(sv);

void
warn_sv(sv)
    SV *sv
CODE:
    warn_sv(sv);

SV *
mess_sv(sv, consume)
    SV *sv
    bool consume
CODE:
    RETVAL = newSVsv(mess_sv(sv, consume));
OUTPUT:
    RETVAL

void
croak_no_modify()
CODE:
    croak_no_modify();

void
croak_memory_wrap()
CODE:
    croak_memory_wrap();

void
croak_xs_usage(params)
    char *params
CODE:
    croak_xs_usage(cv, params);

=tests plan => 93

BEGIN { if ($] lt '5.006') { $^W = 0; } }

my $warn;
my $die;
local $SIG{__WARN__} = sub { $warn = $_[0] };
local $SIG{__DIE__} = sub { $die = $_[0] };

my $scalar_ref = \do {my $tmp = 10};
my $array_ref = [];
my $hash_ref = {};
my $obj = bless {}, 'Package';

undef $die;
ok !defined eval { Devel::PPPort::croak_sv("\xE1\n") };
ok $@, "\xE1\n";
ok $die, "\xE1\n";

undef $die;
ok !defined eval { Devel::PPPort::croak_sv(10) };
ok $@ =~ /^10 at $0 line /;
ok $die =~ /^10 at $0 line /;

undef $die;
$@ = 'should not be visible (1)';
ok !defined eval {
    $@ = 'should not be visible (2)';
    Devel::PPPort::croak_sv('');
};
ok $@ =~ /^ at $0 line /;
ok $die =~ /^ at $0 line /;

undef $die;
$@ = 'should not be visible';
ok !defined eval {
    $@ = 'this must be visible';
    Devel::PPPort::croak_sv($@)
};
ok $@ =~ /^this must be visible at $0 line /;
ok $die =~ /^this must be visible at $0 line /;

undef $die;
$@ = 'should not be visible';
ok !defined eval {
    $@ = "this must be visible\n";
    Devel::PPPort::croak_sv($@)
};
ok $@, "this must be visible\n";
ok $die, "this must be visible\n";

undef $die;
ok !defined eval { Devel::PPPort::croak_sv('') };
ok $@ =~ /^ at $0 line /;
ok $die =~ /^ at $0 line /;

undef $die;
ok !defined eval { Devel::PPPort::croak_sv("\xE1") };
ok $@ =~ /^\xE1 at $0 line /;
ok $die =~ /^\xE1 at $0 line /;

undef $die;
ok !defined eval { Devel::PPPort::croak_sv("\xC3\xA1") };
ok $@ =~ /^\xC3\xA1 at $0 line /;
ok $die =~ /^\xC3\xA1 at $0 line /;

undef $warn;
Devel::PPPort::warn_sv("\xE1\n");
ok $warn, "\xE1\n";

undef $warn;
Devel::PPPort::warn_sv(10);
ok $warn =~ /^10 at $0 line /;

undef $warn;
Devel::PPPort::warn_sv('');
ok $warn =~ /^ at $0 line /;

undef $warn;
Devel::PPPort::warn_sv("\xE1");
ok $warn =~ /^\xE1 at $0 line /;

undef $warn;
Devel::PPPort::warn_sv("\xC3\xA1");
ok $warn =~ /^\xC3\xA1 at $0 line /;

ok Devel::PPPort::mess_sv("\xE1\n", 0), "\xE1\n";
ok Devel::PPPort::mess_sv(do {my $tmp = "\xE1\n"}, 1), "\xE1\n";

ok Devel::PPPort::mess_sv(10, 0) =~ /^10 at $0 line /;
ok Devel::PPPort::mess_sv(do {my $tmp = 10}, 1) =~ /^10 at $0 line /;

ok Devel::PPPort::mess_sv('', 0) =~ /^ at $0 line /;
ok Devel::PPPort::mess_sv(do {my $tmp = ''}, 1) =~ /^ at $0 line /;

ok Devel::PPPort::mess_sv("\xE1", 0) =~ /^\xE1 at $0 line /;
ok Devel::PPPort::mess_sv(do {my $tmp = "\xE1"}, 1) =~ /^\xE1 at $0 line /;

ok Devel::PPPort::mess_sv("\xC3\xA1", 0) =~ /^\xC3\xA1 at $0 line /;
ok Devel::PPPort::mess_sv(do {my $tmp = "\xC3\xA1"}, 1) =~ /^\xC3\xA1 at $0 line /;

if ($] ge '5.006') {
    BEGIN { if ($] ge '5.006' && $] lt '5.008') { require utf8; utf8->import(); } }

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv("\x{100}\n") };
    ok $@, "\x{100}\n";
    if ($] ne '5.008') {
        ok $die, "\x{100}\n";
    } else {
        skip 'skip: broken utf8 support in die hook', 0;
    }

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv("\x{100}") };
    ok $@ =~ /^\x{100} at $0 line /;
    if ($] ne '5.008') {
        ok $die =~ /^\x{100} at $0 line /;
    } else {
        skip 'skip: broken utf8 support in die hook', 0;
    }

    if ($] ne '5.008') {
        undef $warn;
        Devel::PPPort::warn_sv("\x{100}\n");
        ok $warn, "\x{100}\n";

        undef $warn;
        Devel::PPPort::warn_sv("\x{100}");
        ok (my $tmp = $warn) =~ /^\x{100} at $0 line /;
    } else {
        skip 'skip: broken utf8 support in warn hook', 0 for 1..2;
    }

    ok Devel::PPPort::mess_sv("\x{100}\n", 0), "\x{100}\n";
    ok Devel::PPPort::mess_sv(do {my $tmp = "\x{100}\n"}, 1), "\x{100}\n";

    ok Devel::PPPort::mess_sv("\x{100}", 0) =~ /^\x{100} at $0 line /;
    ok Devel::PPPort::mess_sv(do {my $tmp = "\x{100}"}, 1) =~ /^\x{100} at $0 line /;
} else {
    skip 'skip: no utf8 support', 0 for 1..12;
}

if (ord('A') != 65) {
    skip 'skip: no ASCII support', 0 for 1..24;
} elsif ($] ge '5.008' && $] ne '5.012000') {
    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv(eval '"\N{U+E1}\n"') };
    ok $@, "\xE1\n";
    ok $die, "\xE1\n";

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv(eval '"\N{U+E1}"') };
    ok $@ =~ /^\xE1 at $0 line /;
    ok $die =~ /^\xE1 at $0 line /;

    {
        undef $die;
        my $expect = eval '"\N{U+C3}\N{U+A1}\n"';
        ok !defined eval { Devel::PPPort::croak_sv("\xC3\xA1\n") };
        ok $@, $expect;
        ok $die, $expect;
    }

    {
        undef $die;
        my $expect = eval 'qr/^\N{U+C3}\N{U+A1} at $0 line /';
        ok !defined eval { Devel::PPPort::croak_sv("\xC3\xA1") };
        ok $@ =~ $expect;
        ok $die =~ $expect;
    }

    undef $warn;
    Devel::PPPort::warn_sv(eval '"\N{U+E1}\n"');
    ok $warn, "\xE1\n";

    undef $warn;
    Devel::PPPort::warn_sv(eval '"\N{U+E1}"');
    ok $warn =~ /^\xE1 at $0 line /;

    undef $warn;
    Devel::PPPort::warn_sv("\xC3\xA1\n");
    ok $warn, eval '"\N{U+C3}\N{U+A1}\n"';

    undef $warn;
    Devel::PPPort::warn_sv("\xC3\xA1");
    ok $warn =~ eval 'qr/^\N{U+C3}\N{U+A1} at $0 line /';

    ok Devel::PPPort::mess_sv(eval('"\N{U+E1}\n"'), 0), eval '"\N{U+E1}\n"';
    ok Devel::PPPort::mess_sv(do {my $tmp = eval '"\N{U+E1}\n"'}, 1), eval '"\N{U+E1}\n"';

    ok Devel::PPPort::mess_sv(eval('"\N{U+E1}"'), 0) =~ eval 'qr/^\N{U+E1} at $0 line /';
    ok Devel::PPPort::mess_sv(do {my $tmp = eval '"\N{U+E1}"'}, 1) =~ eval 'qr/^\N{U+E1} at $0 line /';

    ok Devel::PPPort::mess_sv("\xC3\xA1\n", 0), eval '"\N{U+C3}\N{U+A1}\n"';
    ok Devel::PPPort::mess_sv(do {my $tmp = "\xC3\xA1\n"}, 1), eval '"\N{U+C3}\N{U+A1}\n"';

    ok Devel::PPPort::mess_sv("\xC3\xA1", 0) =~ eval 'qr/^\N{U+C3}\N{U+A1} at $0 line /';
    ok Devel::PPPort::mess_sv(do {my $tmp = "\xC3\xA1"}, 1) =~ eval 'qr/^\N{U+C3}\N{U+A1} at $0 line /';
} else {
    skip 'skip: no support for \N{U+..} syntax', 0 for 1..24;
}

if ($] ge '5.007003' or ($] ge '5.006001' and $] lt '5.007')) {
    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv($scalar_ref) };
    ok $@ == $scalar_ref;
    ok $die == $scalar_ref;

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv($array_ref) };
    ok $@ == $array_ref;
    ok $die == $array_ref;

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv($hash_ref) };
    ok $@ == $hash_ref;
    ok $die == $hash_ref;

    undef $die;
    ok !defined eval { Devel::PPPort::croak_sv($obj) };
    ok $@ == $obj;
    ok $die == $obj;
} else {
    skip 'skip: no support for exceptions', 0 for 1..12;
}

ok !defined eval { Devel::PPPort::croak_no_modify() };
ok $@ =~ /^Modification of a read-only value attempted at $0 line /;

ok !defined eval { Devel::PPPort::croak_memory_wrap() };
ok $@ =~ /^panic: memory wrap at $0 line /;

ok !defined eval { Devel::PPPort::croak_xs_usage("params") };
ok $@ =~ /^Usage: Devel::PPPort::croak_xs_usage\(params\) at $0 line /;