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author | rsc <devnull@localhost> | 2003-09-30 17:47:41 +0000 |
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committer | rsc <devnull@localhost> | 2003-09-30 17:47:41 +0000 |
commit | b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4 (patch) | |
tree | f382987fec33cf639d75b1fe1b5d76b8f155d074 /src/libutf/utfrune.c | |
parent | 5f7d5e8d1899f41b0e5366c0251530ea1dc753d0 (diff) | |
download | plan9port-b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4.tar.gz plan9port-b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4.tar.bz2 plan9port-b2cfc4e2e71d0f0a5113ddfbd93c8285cc4d74e4.zip |
Initial revision
Diffstat (limited to 'src/libutf/utfrune.c')
-rw-r--r-- | src/libutf/utfrune.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/libutf/utfrune.c b/src/libutf/utfrune.c new file mode 100644 index 00000000..1a2e04c9 --- /dev/null +++ b/src/libutf/utfrune.c @@ -0,0 +1,45 @@ +/* + * The authors of this software are Rob Pike and Ken Thompson. + * Copyright (c) 2002 by Lucent Technologies. + * Permission to use, copy, modify, and distribute this software for any + * purpose without fee is hereby granted, provided that this entire notice + * is included in all copies of any software which is or includes a copy + * or modification of this software and in all copies of the supporting + * documentation for such software. + * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY + * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY + * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. + */ +#include <stdarg.h> +#include <string.h> +#include "utf.h" +#include "utfdef.h" + +char* +utfrune(char *s, long c) +{ + long c1; + Rune r; + int n; + + if(c < Runesync) /* not part of utf sequence */ + return strchr(s, c); + + for(;;) { + c1 = *(uchar*)s; + if(c1 < Runeself) { /* one byte rune */ + if(c1 == 0) + return 0; + if(c1 == c) + return s; + s++; + continue; + } + n = chartorune(&r, s); + if(r == c) + return s; + s += n; + } + return 0; +} |