Appendix A: System Routines — Strings
997
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
strncmp
Declaration:
int
strncmp
(const char *
s1
, const char *
s2
, size_t
maxlen
)
Category(ies):
Strings
Description:
Compare at most
maxlen
characters (stopping after a null character) of
s1
and
s2
and return the same result as
strcmp
.
Inputs:
s1
— Character string.
s2
— Character string.
maxlen
— Maximum length to search.
Outputs:
Returns zero if the strings are identical, a positive number if the string
pointed to by
s1
is greater than the string pointed to by
s2
, or a negative
number if the string pointed to by
s1
is less than the string pointed to by
s2
.
If the strings differ, the value of the first nonmatching character in
s2
subtracted from the corresponding character in
s1
is returned. The
subtraction casts the input strings to unsigned chars so that the characters
in the range 128 . . . 255 are considered above the characters in the range
0 . . . 127.
Assumptions:
None
Side Effects:
None
Availability:
All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences:
None
See Also: strcmp, memcmp
Example:
If keyName points to a character string that begins with the string “XR_”,
this example returns a pointer to the string after the “_” character.
if (0 == strncmp( keyName, "XR_", 3 ))
return keyName + 3;
To Next Page
Loading...
Need help?
General
