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#ifndef BYTE_H
#define BYTE_H
/* for size_t: */
#include <stddef.h>
#ifndef __pure__
#define __pure__
#endif
/* byte_chr returns the smallest integer i between 0 and len-1
* inclusive such that one[i] equals needle, or len if not found. */
size_t byte_chr(const void* haystack, size_t len, char needle) __pure__;
/* byte_rchr returns the largest integer i between 0 and len-1 inclusive
* such that one[i] equals needle, or len if not found. */
size_t byte_rchr(const void* haystack,size_t len,char needle) __pure__;
/* byte_copy copies in[0] to out[0], in[1] to out[1], ... and in[len-1]
* to out[len-1]. */
void byte_copy(void* out, size_t len, const void* in);
/* byte_copyr copies in[len-1] to out[len-1], in[len-2] to out[len-2],
* ... and in[0] to out[0] */
void byte_copyr(void* out, size_t len, const void* in);
/* byte_diff returns negative, 0, or positive, depending on whether the
* string a[0], a[1], ..., a[len-1] is lexicographically smaller
* than, equal to, or greater than the string b[0], b[1], ...,
* b[len-1]. When the strings are different, byte_diff does not read
* bytes past the first difference. */
int byte_diff(const void* a, size_t len, const void* b) __pure__;
/* byte_zero sets the bytes out[0], out[1], ..., out[len-1] to 0 */
void byte_zero(void* out, size_t len);
#define byte_equal(s,n,t) (!byte_diff((s),(n),(t)))
#endif
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