diff options
Diffstat (limited to 'sys/libunicode/find.c')
-rw-r--r-- | sys/libunicode/find.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/sys/libunicode/find.c b/sys/libunicode/find.c new file mode 100644 index 0000000..659ab5b --- /dev/null +++ b/sys/libunicode/find.c @@ -0,0 +1,30 @@ +#include "internal.h" + +byte* +utf8·find(byte* s, rune c) +{ + long c1; + rune r; + int n; + + if(c < RuneSync) + return strchr(s, c); + + for(;;){ + c1 = *(ubyte*)s; + if(c1 < RuneSelf) { + if(c1 == 0) return nil; + if(c1 == c) return s; + s++; + continue; + } + n = utf8·decode(s, &r); + + if(r == c) + return s; + + s += n; + } + + return nil; +} |