diff options
Diffstat (limited to 'sys/libunicode/fullrune.c')
-rw-r--r-- | sys/libunicode/fullrune.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/libunicode/fullrune.c b/sys/libunicode/fullrune.c new file mode 100644 index 0000000..e5cf314 --- /dev/null +++ b/sys/libunicode/fullrune.c @@ -0,0 +1,18 @@ +#include "internal.h" + +int +utf8·fullrune(byte* s, int n) +{ + int i; + rune c; + + if (n <= 0) return 0; + c = *(ubyte*) s; + if (c < Tx) return 1; + + for (i = 3; i < UTFmax + 1; i++) { + if (c < Tbyte(i)) return n >= i - 1; + } + + return n >= UTFmax; +} |