44 lines
994 B
C
44 lines
994 B
C
#ifndef key_h
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#define key_h
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/*
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This file contains macros and data to be used in generation of a unique
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key by set_key().
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*/
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#define KEY_SIZE 50
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#define TABLE_SIZE 66
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#define DB_ID_NTRACKS 5
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static char table[TABLE_SIZE] = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
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'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
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'U', 'V', 'W', 'X', 'Y', 'Z', '@', '_', '=', '+',
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
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'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
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'u', 'v', 'w', 'x', 'y', 'z',
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};
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/*
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map produces side effects on b and len.
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val is an int whose information contain must be rolled into b.
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b is a char*, and map appends to b information contained in val.
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*/
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#define map(b, len, val)\
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if (val >= TABLE_SIZE) {\
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if ((len + 2) < KEY_SIZE) {\
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sprintf(b, "%02d", val);\
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b += 2;\
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len += 2;\
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}\
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}\
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else {\
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if (len + 1 < KEY_SIZE) {\
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*b++ = table[val];\
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len++;\
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}\
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}\
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#endif
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