add example for reading a line from the terminal, non-blocking

Handles utf8, and character width

1 files changed, 21 insertions, 0 deletions

diff --git a/src/wcwidth.h b/src/wcwidth.h
new file mode 100644
index 0000000..f2fee11
--- /dev/null
+++ b/src/wcwidth.h
@@ -0,0 +1,21 @@
+// wcwidth.h
+
+// Windows does not have a wcwidth function, so we use compatibilty code from
+// http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c by Markus Kuhn
+
+#ifndef MK_WCWIDTH_H
+#define MK_WCWIDTH_H
+
+
+#ifdef _WIN32
+#include <stdint.h>
+typedef uint32_t mk_wchar_t; // Windows wchar_t can be 16-bit, we need 32-bit
+#else
+#include <wchar.h>
+typedef wchar_t mk_wchar_t;  // Posix wchar_t is 32-bit so just use that
+#endif
+
+int mk_wcwidth(mk_wchar_t ucs);
+int mk_wcswidth(const mk_wchar_t *pwcs, size_t n);
+
+#endif // MK_WCWIDTH_H