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