From ab9672ae73248f51e30f4553c4b8878525e46383 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Mon, 13 Oct 2014 20:59:42 -0400 Subject: implement uchar.h (C11 UTF-16/32 conversion) interfaces --- src/multibyte/c16rtomb.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/multibyte/c16rtomb.c (limited to 'src/multibyte/c16rtomb.c') diff --git a/src/multibyte/c16rtomb.c b/src/multibyte/c16rtomb.c new file mode 100644 index 00000000..2e8ec970 --- /dev/null +++ b/src/multibyte/c16rtomb.c @@ -0,0 +1,33 @@ +#include +#include +#include + +size_t c16rtomb(char *restrict s, char16_t c16, mbstate_t *restrict ps) +{ + unsigned *x = (unsigned *)ps; + wchar_t wc; + + if (!s) { + if (*x) goto ilseq; + return 1; + } + + if (!*x && c16 - 0xd800u < 0x400) { + *x = c16 - 0xd7c0 << 10; + return 0; + } + + if (*x) { + if (c16 - 0xdc00u >= 0x400) goto ilseq; + else wc = *x + c16 - 0xdc00; + *x = 0; + } else { + wc = c16; + } + return wcrtomb(s, wc, 0); + +ilseq: + *x = 0; + errno = EILSEQ; + return -1; +} -- cgit v1.2.1