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#include <limits.h>
#include <locale.h>
#include <string.h>
#include <bits/ensure.h>
#include <mlibc/debug.hpp>
#include <frg/optional.hpp>
namespace {
// Values of the C locale are defined by the C standard.
constexpr lconv c_lconv = {
const_cast<char *>("."), // decimal_point
const_cast<char *>(""), // thousands_sep
const_cast<char *>(""), // grouping
const_cast<char *>(""), // mon_decimal_point
const_cast<char *>(""), // mon_thousands_sep
const_cast<char *>(""), // mon_grouping
const_cast<char *>(""), // positive_sign
const_cast<char *>(""), // negative_sign
const_cast<char *>(""), // currency_symbol
CHAR_MAX, // frac_digits
CHAR_MAX, // p_cs_precedes
CHAR_MAX, // n_cs_precedes
CHAR_MAX, // p_sep_by_space
CHAR_MAX, // n_sep_by_space
CHAR_MAX, // p_sign_posn
CHAR_MAX, // n_sign_posn
const_cast<char *>(""), // int_curr_symbol
CHAR_MAX, // int_frac_digits
CHAR_MAX, // int_p_cs_precedes
CHAR_MAX, // int_n_cs_precedes
CHAR_MAX, // int_p_sep_by_space
CHAR_MAX, // int_n_sep_by_space
CHAR_MAX, // int_p_sign_posn
CHAR_MAX // int_n_sign_posn
};
}
namespace mlibc {
struct locale_description {
// Identifier of this locale. used in setlocale().
const char *name;
lconv lc;
};
constinit const locale_description c_locale{
.name = "C",
.lc = c_lconv
};
constinit const locale_description posix_locale{
.name = "POSIX",
.lc = c_lconv
};
const locale_description *query_locale_description(const char *name) {
if(!strcmp(name, "C"))
return &c_locale;
if(!strcmp(name, "POSIX"))
return &posix_locale;
return nullptr;
}
const locale_description *collate_facet;
const locale_description *ctype_facet;
const locale_description *monetary_facet;
const locale_description *numeric_facet;
const locale_description *time_facet;
const locale_description *messages_facet;
}
void __mlibc_initLocale() {
mlibc::collate_facet = &mlibc::c_locale;
mlibc::ctype_facet = &mlibc::c_locale;
mlibc::monetary_facet = &mlibc::c_locale;
mlibc::numeric_facet = &mlibc::c_locale;
mlibc::time_facet = &mlibc::c_locale;
mlibc::messages_facet = &mlibc::c_locale;
}
char *setlocale(int category, const char *name) {
if(category == LC_ALL) {
// ´TODO: Implement correct return value when categories differ.
auto current_desc = mlibc::collate_facet;
__ensure(current_desc == mlibc::ctype_facet);
__ensure(current_desc == mlibc::monetary_facet);
__ensure(current_desc == mlibc::numeric_facet);
__ensure(current_desc == mlibc::time_facet);
__ensure(current_desc == mlibc::messages_facet);
if(name) {
// Our default C locale is the C locale.
if(!strlen(name))
name = "C";
auto new_desc = mlibc::query_locale_description(name);
if(!new_desc) {
mlibc::infoLogger() << "mlibc: Locale " << name
<< " is not supported" << frg::endlog;
return nullptr;
}
mlibc::collate_facet = new_desc;
mlibc::ctype_facet = new_desc;
mlibc::monetary_facet = new_desc;
mlibc::numeric_facet = new_desc;
mlibc::time_facet = new_desc;
mlibc::messages_facet = new_desc;
}
return const_cast<char *>(current_desc->name);
}else{
const mlibc::locale_description **facet_ptr;
switch(category) {
case LC_COLLATE:
facet_ptr = &mlibc::collate_facet;
break;
case LC_CTYPE:
facet_ptr = &mlibc::ctype_facet;
break;
case LC_MONETARY:
facet_ptr = &mlibc::monetary_facet;
break;
case LC_NUMERIC:
facet_ptr = &mlibc::numeric_facet;
break;
case LC_TIME:
facet_ptr = &mlibc::time_facet;
break;
case LC_MESSAGES:
facet_ptr = &mlibc::messages_facet;
break;
default:
mlibc::infoLogger() << "mlibc: Unexpected value " << category
<< " for category in setlocale()" << frg::endlog;
return nullptr;
}
auto current_desc = *facet_ptr;
if(name) {
// Our default C locale is the C locale.
if(!strlen(name))
name = "C";
auto new_desc = mlibc::query_locale_description(name);
if(!new_desc) {
mlibc::infoLogger() << "mlibc: Locale " << name
<< " is not supported" << frg::endlog;
return nullptr;
}
*facet_ptr = new_desc;
}
return const_cast<char *>(current_desc->name);
}
}
namespace {
lconv effective_lc;
}
struct lconv *localeconv(void) {
// Numeric locale.
const auto &numeric_lc = mlibc::numeric_facet->lc;
effective_lc.decimal_point = numeric_lc.decimal_point;
effective_lc.thousands_sep = numeric_lc.thousands_sep;
effective_lc.grouping = numeric_lc.grouping;
// Monetary locale.
const auto &monetary_lc = mlibc::monetary_facet->lc;
effective_lc.mon_decimal_point = monetary_lc.mon_decimal_point;
effective_lc.mon_thousands_sep = monetary_lc.mon_thousands_sep;
effective_lc.mon_grouping = monetary_lc.mon_grouping;
effective_lc.positive_sign = monetary_lc.positive_sign;
effective_lc.negative_sign = monetary_lc.negative_sign;
effective_lc.currency_symbol = monetary_lc.currency_symbol;
effective_lc.frac_digits = monetary_lc.frac_digits;
effective_lc.p_cs_precedes = monetary_lc.p_cs_precedes;
effective_lc.n_cs_precedes = monetary_lc.n_cs_precedes;
effective_lc.p_sep_by_space = monetary_lc.p_sep_by_space;
effective_lc.n_sep_by_space = monetary_lc.n_sep_by_space;
effective_lc.p_sign_posn = monetary_lc.p_sign_posn;
effective_lc.n_sign_posn = monetary_lc.n_sign_posn;
effective_lc.int_curr_symbol = monetary_lc.int_curr_symbol;
effective_lc.int_frac_digits = monetary_lc.int_frac_digits;
effective_lc.int_p_cs_precedes = monetary_lc.int_p_cs_precedes;
effective_lc.int_n_cs_precedes = monetary_lc.int_n_cs_precedes;
effective_lc.int_p_sep_by_space = monetary_lc.int_p_sep_by_space;
effective_lc.int_n_sep_by_space = monetary_lc.int_n_sep_by_space;
effective_lc.int_p_sign_posn = monetary_lc.int_p_sign_posn;
effective_lc.int_n_sign_posn = monetary_lc.int_n_sign_posn;
return &effective_lc;
}
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