diff options
Diffstat (limited to 'str_diff.c')
-rw-r--r-- | str_diff.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/str_diff.c b/str_diff.c new file mode 100644 index 0000000..071e7f5 --- /dev/null +++ b/str_diff.c @@ -0,0 +1,15 @@ +#include "str.h" + +int str_diff(register const char *s,register const char *t) +{ + register char x; + + for (;;) { + x = *s; if (x != *t) break; if (!x) break; ++s; ++t; + x = *s; if (x != *t) break; if (!x) break; ++s; ++t; + x = *s; if (x != *t) break; if (!x) break; ++s; ++t; + x = *s; if (x != *t) break; if (!x) break; ++s; ++t; + } + return ((int)(unsigned int)(unsigned char) x) + - ((int)(unsigned int)(unsigned char) *t); +} |