Home

       wcrtomb.c - scc - simple c99 compiler
  HTML git clone git://git.simple-cc.org/scc
   DIR Log
   DIR Files
   DIR Refs
   DIR Submodules
   DIR README
   DIR LICENSE
       ---
       wcrtomb.c (407B)
       ---
            1 #include <errno.h>
            2 #include <wchar.h>
            3 
            4 #include "../libc.h"
            5 
            6 #undef wcrtomb
            7 
            8 size_t
            9 wcrtomb(char *restrict s, wchar_t wc, mbstate_t *restrict ps)
           10 {
           11         int i, n;
           12         unsigned long c = wc;
           13 
           14         if (!s)
           15                 return 1;
           16 
           17         if (!_validutf8(wc, &n)) {
           18                 errno = EILSEQ;
           19                 return -1;
           20         }
           21 
           22         n--;
           23         *s = 0;
           24         for (i = 0; i < n; i++) {
           25                 *s >>= 1;
           26                 *s |= 0x80;
           27 
           28                 s[n-i] = 0x80 | (c & 0x3f);
           29                 c >>= 6;
           30         }
           31         *s |= c;
           32 
           33         return n+1;
           34 }