LIBRARY

#include <xtend/string.h>
-lxtend

SYNOPSIS

uint64_t    str2u64(const char *str)

ARGUMENTS

str     String to convert

DESCRIPTION

This sort of hashing is useful for storing lists of very short strings, as it eliminates the need to use strdup(), strlcpy(), and strcmp() for processing. Strings can be compared for equality using a straight integer comparison. Strings of 7 or fewer characters can still be accessed as a string by simply casting to char * for output, then using lexical comparison with strcmp(), etc. A string of 8 characters will not have a null-terminator.

The value returned varies depending on endianness. Hence, hash values generated on one architecture will need to be byte swapped before comparison to values generated under a different endianness.

RETURN VALUES

EXAMPLES

char        *s1 = "hello!", s2 = "Hello!";
uint64_t    v1, v2;
v1 = str2u64(s1);
v2 = str2u64(s2);
if ( v1 != v2 )
    printf("%s and %s are different.n", (char *)&v1, (char *)&v2);

SEE ALSO