summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/multibyte/c16rtomb.c33
-rw-r--r--src/multibyte/c32rtomb.c7
-rw-r--r--src/multibyte/mbrtoc16.c28
-rw-r--r--src/multibyte/mbrtoc32.c11
4 files changed, 79 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;
+}
diff --git a/src/multibyte/c32rtomb.c b/src/multibyte/c32rtomb.c
new file mode 100644
index 00000000..67851328
--- /dev/null
+++ b/src/multibyte/c32rtomb.c
@@ -0,0 +1,7 @@
+#include <uchar.h>
+#include <wchar.h>
+
+size_t c32rtomb(char *restrict s, char32_t c32, mbstate_t *restrict ps)
+{
+ return wcrtomb(s, c32, ps);
+}
diff --git a/src/multibyte/mbrtoc16.c b/src/multibyte/mbrtoc16.c
new file mode 100644
index 00000000..74b7d77e
--- /dev/null
+++ b/src/multibyte/mbrtoc16.c
@@ -0,0 +1,28 @@
+#include <uchar.h>
+#include <wchar.h>
+
+size_t mbrtoc16(char16_t *restrict pc16, const char *restrict s, size_t n, mbstate_t *restrict ps)
+{
+ unsigned *pending = (unsigned *)ps;
+
+ if (!s) return mbrtoc16(0, "", 1, ps);
+
+ /* mbrtowc states for partial UTF-8 characters have the high bit set;
+ * we use nonzero states without high bit for pending surrogates. */
+ if ((int)*pending > 0) {
+ if (pc16) *pc16 = *pending;
+ *pending = 0;
+ return -3;
+ }
+
+ wchar_t wc;
+ size_t ret = mbrtowc(&wc, s, n, ps);
+ if (ret <= 4) {
+ if (wc >= 0x10000) {
+ *pending = (wc & 0x3ff) + 0xdc00;
+ wc = 0xd7c0 + (wc >> 10);
+ }
+ if (pc16) *pc16 = wc;
+ }
+ return ret;
+}
diff --git a/src/multibyte/mbrtoc32.c b/src/multibyte/mbrtoc32.c
new file mode 100644
index 00000000..c6d20824
--- /dev/null
+++ b/src/multibyte/mbrtoc32.c
@@ -0,0 +1,11 @@
+#include <uchar.h>
+#include <wchar.h>
+
+size_t mbrtoc32(char32_t *restrict pc32, const char *restrict s, size_t n, mbstate_t *restrict ps)
+{
+ if (!s) return mbrtoc32(0, "", 1, ps);
+ wchar_t wc;
+ size_t ret = mbrtowc(&wc, s, n, ps);
+ if (ret <= 4 && pc32) *pc32 = wc;
+ return ret;
+}