added locale.h and added more wide-char prototypes

src/libc/header_test.c

@@ -10,6 +10,7 @@
 #include <inttypes.h>
 #include <iso646.h>
 #include <limits.h>
+#include <locale.h>
 #include <math.h>
 #include <setjmp.h>
 #include <stdalign.h>

src/libc/include/__wchar_def.h

@@ -3,13 +3,6 @@
 
 #include <cdefs.h>
 
-#ifndef _WCHAR_T_DEFINED
-#define _WCHAR_T_DEFINED
-#ifndef __cplusplus
-typedef __WCHAR_TYPE__ wchar_t;
-#endif /* __cplusplus */
-#endif /* _WCHAR_T_DEFINED */
-
 #ifndef _WINT_T_DEFINED
 #define _WINT_T_DEFINED
 typedef __WINT_TYPE__ wint_t;

src/libc/include/cdefs.h

@@ -36,9 +36,16 @@
 # endif /* __cplusplus */
 #endif /* NULL */
 
-#ifndef SIZE_T_DEFINED
-#define SIZE_T_DEFINED
+#ifndef _SIZE_T_DEFINED
+#define _SIZE_T_DEFINED
 typedef __SIZE_TYPE__ size_t;
-#endif /* SIZE_T_DEFINED */
+#endif /* _SIZE_T_DEFINED */
+
+#ifndef _WCHAR_T_DEFINED
+#define _WCHAR_T_DEFINED
+#ifndef __cplusplus
+typedef __WCHAR_TYPE__ wchar_t;
+#endif /* __cplusplus */
+#endif /* _WCHAR_T_DEFINED */
 
 #endif /* _CDEFS_H */

src/libc/include/inttypes.h

@@ -177,21 +177,21 @@ typedef struct {
 
 __BEGIN_DECLS
 
-extern intmax_t imaxabs(intmax_t __n) __NOEXCEPT_CONST;
+intmax_t imaxabs(intmax_t __n) __NOEXCEPT_CONST;
 
-extern imaxdiv_t imaxdiv(intmax_t __numer, intmax_t __denom) __NOEXCEPT_CONST;
+imaxdiv_t imaxdiv(intmax_t __numer, intmax_t __denom) __NOEXCEPT_CONST;
 
-intmax_t strtoimax(
-    const char *__restrict nptr,
-    char **__restrict endptr,
-    int base
-) __attribute__((nonnull(1)));
+intmax_t strtoimax(const char *__restrict nptr, char **__restrict endptr, int base)
+    __attribute__((nonnull(1)));
 
-uintmax_t strtoumax(
-    const char *__restrict nptr,
-    char **__restrict endptr,
-    int base
-) __attribute__((nonnull(1)));
+uintmax_t strtoumax(const char *__restrict nptr, char **__restrict endptr, int base)
+    __attribute__((nonnull(1)));
+
+intmax_t wcstoimax(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base)
+    __attribute__((nonnull(1)));
+
+uintmax_t wcstoumax(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base)
+    __attribute__((nonnull(1)));
 
 __END_DECLS
 

src/libc/include/limits.h

@@ -48,4 +48,8 @@
 #define  ULLONG_MAX  __ULONG_LONG_MAX__
 #define  ULLONG_WIDTH     __LLONG_WIDTH__
 
+#ifndef   MB_LEN_MAX
+#define   MB_LEN_MAX 1
+#endif /* MB_LEN_MAX */
+
 #endif /* _LIMITS_H */

src/libc/include/locale.h

@@ -0,0 +1,53 @@
+#ifndef _LOCALE_H
+#define _LOCALE_H
+
+#include <cdefs.h>
+
+struct lconv {
+    char* decimal_point;        /* "."      */
+    char* thousands_sep;        /* ""       */
+    char* grouping;             /* ""       */
+    char* mon_decimal_point;    /* ""       */
+    char* mon_thousands_sep;    /* ""       */
+    char* mon_grouping;         /* ""       */
+    char* positive_sign;        /* ""       */
+    char* negative_sign;        /* ""       */
+    char* currency_symbol;      /* ""       */
+    char  frac_digits;          /* CHAR_MAX */
+    char  p_cs_precedes;        /* CHAR_MAX */
+    char  n_cs_precedes;        /* CHAR_MAX */
+    char  p_sep_by_space;       /* CHAR_MAX */
+    char  n_sep_by_space;       /* CHAR_MAX */
+    char  p_sign_posn;          /* CHAR_MAX */
+    char  n_sign_posn;          /* CHAR_MAX */
+    char* int_curr_symbol;      /* ""       */
+    char  int_frac_digits;      /* CHAR_MAX */
+    char  int_p_cs_precedes;    /* CHAR_MAX */
+    char  int_n_cs_precedes;    /* CHAR_MAX */
+    char  int_p_sep_by_space;   /* CHAR_MAX */
+    char  int_n_sep_by_space;   /* CHAR_MAX */
+    char  int_p_sign_posn;      /* CHAR_MAX */
+    char  int_n_sign_posn;      /* CHAR_MAX */
+};
+
+#define LC_COLLATE  (0x010)
+#define LC_CTYPE    (0x020)
+#define LC_MONETARY (0x040)
+#define LC_NUMERIC  (0x080)
+#define LC_TIME     (0x100)
+#define LC_MESSAGES (0x200)
+#define LC_ALL      (LC_COLLATE | LC_CTYPE | LC_MONETARY | LC_NUMERIC | LC_TIME | LC_MESSAGES)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+char* setlocale(int category, const char* locale);
+
+struct lconv* localeconv(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LOCALE_H */

src/libc/include/stddef.h

@@ -7,13 +7,6 @@
 
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 
-#ifndef _WCHAR_T_DEFINED
-#define _WCHAR_T_DEFINED
-#ifndef __cplusplus
-typedef __WCHAR_TYPE__ wchar_t;
-#endif /* __cplusplus */
-#endif /* _WCHAR_T_DEFINED */
-
 #if __STDC_VERSION__ >= 199901L || __cplusplus >= 201103L
 typedef struct {
     long long    __max_align_ll __attribute__((__aligned__(__alignof__(  long long))));

src/libc/include/stdlib.h

@@ -123,6 +123,20 @@ lldiv_t lldiv(long long numer, long long denom);
 i48div_t i48div(signed __int48 numer, signed __int48 denom) __NOEXCEPT_CONST;
 #endif /* __SIZEOF_INT48__ */
 
+int mblen(const char* s, size_t n);
+
+int mbtowc(wchar_t* pwc, const char* s, size_t n);
+
+int wctomb(char* s, wchar_t wchar);
+
+size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n);
+
+size_t wcstombs(char* s, const wchar_t* pwcs, size_t n);
+
+int __mb_cur_max(void);
+
+#define MB_CUR_MAX __mb_cur_max()
+
 __END_DECLS
 
 #endif /* _STDLIB_H */

src/libc/include/string.h

@@ -118,6 +118,10 @@ int strncasecmp(const char *s1, const char *s2, size_t n)
 
 char* strerror(int errnum);
 
+int strcoll(const char *s1, const char *s2);
+
+size_t strxfrm(char *__restrict dest, const char *__restrict src, size_t n);
+
 __END_DECLS
 
 #endif /* _STRING_H */

src/libc/include/wchar.h

@@ -2,6 +2,16 @@
 #define _WCHAR_H
 
 #include <__wchar_def.h>
+#include <stdio.h>
+#include <time.h>
+
+typedef struct {
+    int __count;
+    union {
+        wint_t __value;
+        unsigned char __bytes[sizeof(wint_t)];
+    };
+} mbstate_t;
 
 __BEGIN_DECLS
 
@@ -65,6 +75,86 @@ int wcscmp(const wchar_t *s1, const wchar_t *s2)
 int wcsncmp(const wchar_t *s1, const wchar_t *s2, size_t n)
     __attribute__((nonnull(1, 2)));
 
+int wprintf(const wchar_t *__restrict format, ...);
+
+int vwprintf(const wchar_t *__restrict format, va_list va);
+
+int swprintf(wchar_t *__restrict buffer, size_t count, const wchar_t *__restrict format, ...);
+
+int vswprintf(wchar_t *__restrict buffer, size_t count, const wchar_t *__restrict format, va_list va);
+
+int fwprintf(FILE *__restrict stream, const wchar_t *__restrict format, ...);
+
+int vfwprintf(FILE *__restrict stream, const wchar_t *__restrict format, va_list va);
+
+int wscanf(const wchar_t *__restrict format, ...);
+
+int vwscanf(const wchar_t *__restrict format, va_list arg);
+
+int swscanf(const wchar_t *__restrict s, const wchar_t *__restrict format, ...);
+
+int vswscanf(const wchar_t *__restrict s, const wchar_t *__restrict format, va_list arg);
+
+int fwscanf(FILE *__restrict stream, const wchar_t *__restrict format, ...);
+
+int vfwscanf(FILE *__restrict stream, const wchar_t *__restrict format, va_list arg);
+
+wint_t fgetwc(FILE *stream);
+
+wchar_t *fgetws(wchar_t *__restrict s, int n, FILE *__restrict stream);
+
+wint_t fputwc(wchar_t c, FILE *stream);
+
+int fputws(const wchar_t *__restrict s, FILE *__restrict stream);
+
+int fwide(FILE *stream, int mode);
+
+wint_t getwc(FILE *stream);
+
+wint_t getwchar(void);
+
+wint_t putwc(wchar_t c, FILE *stream);
+
+wint_t putwchar(wchar_t c);
+
+wint_t ungetwc(wint_t c, FILE *stream);
+
+float wcstof(const wchar_t *__restrict nptr, wchar_t * *__restrict endptr);
+
+double wcstod(const wchar_t *__restrict nptr, wchar_t **__restrict endptr);
+
+long double wcstold(const wchar_t *__restrict nptr, wchar_t **__restrict endptr);
+
+long wcstol(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base);
+
+long long wcstoll(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base);
+
+unsigned long wcstoul(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base);
+
+unsigned long long wcstoull(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base);
+
+size_t wcsftime(wchar_t *__restrict s, size_t maxsize, const wchar_t *__restrict format, const struct tm *__restrict timeptr);
+
+int wcscoll(const wchar_t* s1, const wchar_t* s2);
+
+size_t wcsxfrm(wchar_t *__restrict s1, const wchar_t *__restrict s2, size_t n);
+
+wint_t btowc(int c);
+
+int wctob(wint_t c);
+
+int mbsinit(const mbstate_t* ps);
+
+size_t mbrlen(const char *__restrict s, size_t n, mbstate_t *__restrict ps);
+
+size_t mbrtowc(wchar_t *__restrict pwc, const char *__restrict s, size_t n, mbstate_t *__restrict ps);
+
+size_t wcrtomb(char *__restrict s, wchar_t wc, mbstate_t *__restrict ps);
+
+size_t mbsrtowcs(wchar_t *__restrict dst, const char* *__restrict src, size_t len, mbstate_t *__restrict ps);
+
+size_t wcsrtombs(char *__restrict dst, const wchar_t **__restrict src, size_t len, mbstate_t *__restrict ps);
+
 __END_DECLS
 
 #endif /* _WCHAR_H */

src/libc/include/wctype.h

@@ -3,6 +3,10 @@
 
 #include <__wchar_def.h>
 
+typedef int wctrans_t;
+
+typedef int wctype_t;
+
 __BEGIN_DECLS
 
 int iswalnum(wint_t wc);
@@ -33,6 +37,14 @@ wint_t towlower(wint_t wc);
 
 wint_t towupper(wint_t wc);
 
+wint_t towctrans(wint_t wc, wctrans_t desc);
+
+wctrans_t wctrans(const char *str);
+
+int iswctype(wint_t wc, wctype_t desc);
+
+wctype_t wctype(const char *property);
+
 __END_DECLS
 
 #endif /* _WCTYPE_H */

src/libc/locale.c

@@ -0,0 +1,51 @@
+#include <limits.h>
+#include <locale.h>
+
+const struct lconv __c_locale = {
+    .decimal_point =       ".",
+    .thousands_sep =       "",
+    .grouping =            "",
+    .mon_decimal_point =   "",
+    .mon_thousands_sep =   "",
+    .mon_grouping =        "",
+    .positive_sign =       "",
+    .negative_sign =       "",
+    .currency_symbol =     "",
+    .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 =         CHAR_MAX,
+    .int_curr_symbol =     "",
+    .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 =     CHAR_MAX,
+};
+
+char *setlocale(__attribute__((__unused__)) int category, const char *locale) {
+    // query the locale without modifiying it
+    if (locale == NULL) {
+        return "C";
+    }
+    // use preferred locale (the "C" locale)
+    if (locale[0] == '\0') {
+        return "C";
+    }
+    // use the "C" locale
+    if (locale[0] == 'C' && locale[1] == '\0') {
+        return "C";
+    }
+    // unknown locale
+    return NULL;
+}
+
+struct lconv *localeconv(void) {
+    // it is undefined behavior to modify the returned object
+    return (struct lconv*)&__c_locale;
+}

src/libcxx/header_test.cpp

@@ -9,6 +9,7 @@
 #include <cinttypes>
 #include <ciso646>
 #include <climits>
+#include <clocale>
 #include <cmath>
 #if __cplusplus >= 201907L
 #include <concepts>
@@ -52,6 +53,7 @@
 #include <inttypes.h>
 #include <iso646.h>
 #include <limits.h>
+#include <locale.h>
 #include <math.h>
 #include <setjmp.h>
 #include <stdalign.h>

src/libcxx/include/cinttypes

@@ -17,6 +17,9 @@ using ::imaxdiv;
 using ::strtoimax;
 using ::strtoumax;
 
+using ::wcstoimax;
+using ::wcstoumax;
+
 #if __INTMAX_WIDTH__ > __LLONG_WIDTH__
 inline constexpr intmax_t abs(intmax_t __x) { return imaxabs(__x); }
 inline constexpr imaxdiv_t div(intmax_t __x, intmax_t __y) { return imaxdiv(__x, __y); }