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author | Nicholas <nbnoll@eml.cc> | 2021-11-10 20:12:45 -0800 |
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committer | Nicholas <nbnoll@eml.cc> | 2021-11-10 20:12:45 -0800 |
commit | b5de2d7bd1e08d27f7780434e601d6d3a0750583 (patch) | |
tree | 1d12af8a2c5903f1eef3b967e52474a244e78257 /sys/libutf/findlast.c | |
parent | 0a1041044141ddbda0c67602e70fe8894e7430fd (diff) |
chore: libunicode -> libutf
Diffstat (limited to 'sys/libutf/findlast.c')
-rw-r--r-- | sys/libutf/findlast.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sys/libutf/findlast.c b/sys/libutf/findlast.c new file mode 100644 index 0000000..ab25ab2 --- /dev/null +++ b/sys/libutf/findlast.c @@ -0,0 +1,32 @@ +#include "internal.h" + +byte* +utf8·findlast(byte* s, rune c) +{ + long c1; + rune r; + byte *l; + + if(c < Tx) + return strrchr(s, c); + + l = nil; + for(;;){ + c1 = *(ubyte*)s; + if(c1 < Tx){ + if(c1 == 0) return l; + if(c1 == c) l = s; + s++; + continue; + } + + c1 = utf8·decode(s, &r); + + if(r == c) + l = s; + + s += c1; + } + + return nil; +} |