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author | Rich Felker <dalias@aerifal.cx> | 2014-10-13 20:59:42 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2014-10-13 20:59:42 -0400 |
commit | ab9672ae73248f51e30f4553c4b8878525e46383 (patch) | |
tree | fd3cfee2bcc10a64b83009af92f0de09703dfa75 /src/multibyte/c16rtomb.c | |
parent | 00548408398ced546c540dab773ea66cea4fe1c2 (diff) | |
download | musl-ab9672ae73248f51e30f4553c4b8878525e46383.tar.gz musl-ab9672ae73248f51e30f4553c4b8878525e46383.tar.xz musl-ab9672ae73248f51e30f4553c4b8878525e46383.zip |
implement uchar.h (C11 UTF-16/32 conversion) interfaces
Diffstat (limited to 'src/multibyte/c16rtomb.c')
-rw-r--r-- | src/multibyte/c16rtomb.c | 33 |
1 files changed, 33 insertions, 0 deletions
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 <uchar.h> +#include <errno.h> +#include <wchar.h> + +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; +} |