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71 lines
2.0 KiB
71 lines
2.0 KiB
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */ |
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#ifndef BYTE_H |
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#define BYTE_H |
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/* for size_t: */ |
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#include <stddef.h> |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* dietlibc defines these in sys/cdefs.h, which is included from stddef.h */ |
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#ifndef __pure__ |
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#define __pure__ |
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#endif |
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#ifndef __writememsz__ |
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#define __writememsz__(a,b) |
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#define __readmemsz__(a,b) |
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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 if not found. */ |
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__readmemsz__(1,2) |
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size_t byte_chr(const void* haystack, size_t 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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__readmemsz__(1,2) |
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size_t byte_rchr(const void* haystack,size_t 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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__writememsz__(1,2) |
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__readmemsz__(3,2) |
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void byte_copy(void* out, size_t 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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__writememsz__(1,2) |
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__readmemsz__(3,2) |
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void byte_copyr(void* out, size_t 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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__readmemsz__(1,2) |
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__readmemsz__(3,2) |
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int byte_diff(const void* a, size_t 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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__writememsz__(1,2) |
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void byte_zero(void* out, size_t len); |
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#define byte_equal(s,n,t) (!byte_diff((s),(n),(t))) |
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__readmemsz__(1,2) |
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__readmemsz__(3,2) |
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int byte_equal_notimingattack(const void* a, size_t len,const void* b) __pure__; |
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#if defined(__i386__) || defined(__x86_64__) |
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#define UNALIGNED_ACCESS_OK |
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#endif |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif
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