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45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
NAME
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strncmp - compare two strings up to a specified number of characters
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SYNOPSIS
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strncmp(s1, s2, n)
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TYPES
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s1 string
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s2 string
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n nonnegative integer
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return integer (1, 0 or -1)
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DESCRIPTION
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Let n1 = size(s1), n2 = size(s2) and m = min(n1, n2, n).
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This function compares up to m values of consecutive characters
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in the strings s1 and s2. If an inequality is encountered, the
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function returns 1 or -1 according as the greater character is
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in s1 or s2. If there has been no inequality, the function
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returns 1, 0, or -1 according as min(n1, n) is greater than, equal
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to, or less than min(n2, n); in particular, if n1 and n2 are
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both greater than equal to n, 0 is returned.
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EXAMPLE
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strncmp("abc", "xyz", 0) == 0
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strncmp("abc", "xyz", 1) == -1
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strncmp("abc", "", 1) == 1
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strncmp("a", "b", 2) == -1
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strncmp("ab", "ac", 2) == -1
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strncmp("\0ac", "\0b", 2) == -1
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strncmp("ab", "abc", 2) == 0
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strncmp("abc", "abd", 2) == 0
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LIMITS
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none
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LINK LIBRARY
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This function uses FLAG stringrel(STRING *s1, STRING *s2),
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temporarily replacing the string sizes by min(n1,n) and min(n2,n).
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SEE ALSO
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strcmp
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