Return a modular hash value for the specified null‐terminated string.

Synopsis

Declared in <bdlb_hashutil.h>

static
unsigned int
hash0(
    char const* string,
    int modulus);

Description

Return a pseudo‐random unsigned integer in the range from zero to one less than the specified modulus corresponding to the specified null‐terminated string. The behavior is undefined unless 0 < modulus < 2ˆ31. Note that modulus is expected to be a prime not close to an integral power of 2. Also note that specifying a modulus of 1 will cause 0 to be returned for every string.

Return Value

modular hash value for string in [0 .. modulus)]

Parameters

Name

Description

string

null‐terminated string to hash

modulus

positive upper bound (exclusive) of the hash range

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