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void
constant(sv)
PREINIT:
#ifdef dXSTARG
dXSTARG; /* Faster if we have it. */
#else
dTARGET;
#endif
STRLEN len;
int type;
IV iv;
/* NV nv; Uncomment this if you need to return NVs */
/* const char *pv; Uncomment this if you need to return PVs */
INPUT:
SV * sv;
const char * s = SvPV(sv, len);
PPCODE:
/* Change this to constant(aTHX_ s, len, &iv, &nv);
if you need to return both NVs and IVs */
type = constant(aTHX_ s, len, &iv);
/* Return 1 or 2 items. First is error message, or undef if no error.
Second, if present, is found value */
switch (type) {
case PERL_constant_NOTFOUND:
sv = sv_2mortal(newSVpvf("%s is not a valid I18N::Langinfo macro", s));
PUSHs(sv);
break;
case PERL_constant_NOTDEF:
sv = sv_2mortal(newSVpvf(
"Your vendor has not defined I18N::Langinfo macro %s, used", s));
PUSHs(sv);
break;
case PERL_constant_ISIV:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHi(iv);
break;
/* Uncomment this if you need to return NOs
case PERL_constant_ISNO:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHs(&PL_sv_no);
break; */
/* Uncomment this if you need to return NVs
case PERL_constant_ISNV:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHn(nv);
break; */
/* Uncomment this if you need to return PVs
case PERL_constant_ISPV:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHp(pv, strlen(pv));
break; */
/* Uncomment this if you need to return PVNs
case PERL_constant_ISPVN:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHp(pv, iv);
break; */
/* Uncomment this if you need to return SVs
case PERL_constant_ISSV:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHs(sv);
break; */
/* Uncomment this if you need to return UNDEFs
case PERL_constant_ISUNDEF:
break; */
/* Uncomment this if you need to return UVs
case PERL_constant_ISUV:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHu((UV)iv);
break; */
/* Uncomment this if you need to return YESs
case PERL_constant_ISYES:
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
PUSHs(&PL_sv_yes);
break; */
default:
sv = sv_2mortal(newSVpvf(
"Unexpected return type %d while processing I18N::Langinfo macro %s, used",
type, s));
PUSHs(sv);
}
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