30 lines
457 B
C
30 lines
457 B
C
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/**
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* @file ch.c Character format functions
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*
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* Copyright (C) 2010 Creytiv.com
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*/
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#include <re_types.h>
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#include <re_fmt.h>
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/**
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* Convert a ascii hex character to binary format
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*
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* @param ch Ascii hex character
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*
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* @return Binary value
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*/
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uint8_t ch_hex(char ch)
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{
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if ('0' <= ch && ch <= '9')
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return ch - '0';
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else if ('A' <= ch && ch <= 'F')
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return ch - 'A' + 10;
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else if ('a' <= ch && ch <= 'f')
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return ch - 'a' + 10;
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return 0;
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}
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