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author | Jim Meyering <jim@meyering.net> | 1998-12-31 17:53:59 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1998-12-31 17:53:59 +0000 |
commit | a58c222775cc2937c6f4836cc82bdb4547710986 (patch) | |
tree | 92b57714ba2208fab0f8133f5608d54ce8b93d09 | |
parent | 44538bbbd8cd85adf0e880094cbbbc47c2004e25 (diff) | |
download | coreutils-a58c222775cc2937c6f4836cc82bdb4547710986.tar.xz |
*** empty log message ***
-rw-r--r-- | lib/strncasecmp.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/strncasecmp.c b/lib/strncasecmp.c new file mode 100644 index 000000000..55c0f2ee3 --- /dev/null +++ b/lib/strncasecmp.c @@ -0,0 +1,34 @@ +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#include <sys/types.h> +#include <ctype.h> + +#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) + +/* Compare no more than N characters of S1 and S2, + ignoring case, returning less than, equal to or + greater than zero if S1 is lexicographically less + than, equal to or greater than S2. */ + +int +strncasecmp (const char *s1, const char *s2, size_t n) +{ + register const unsigned char *p1 = (const unsigned char *) s1; + register const unsigned char *p2 = (const unsigned char *) s2; + unsigned char c1, c2; + + if (p1 == p2 || n == 0) + return 0; + + do + { + c1 = TOLOWER (*p1++); + c2 = TOLOWER (*p2++); + if (c1 == '\0' || c1 != c2) + return c1 - c2; + } while (--n > 0); + + return c1 - c2; +} |