72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#ifndef __XAPP_H
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#define __XAPP_H
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/* How many bits for ... */
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/* ... internal significands */
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#define INT_SIGN 48
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/* ... internal fractions */
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#define INT_FRAC 16
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/* ... internal full numbers */
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#define INT_FULL (INT_SIGN + INT_FRAC)
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/* ... exported significands */
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#define EXP_SIGN 20
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/* ... exported fractions */
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#define EXP_FRAC 10
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/* ... exported full numbers */
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#define EXP_FULL (EXP_SIGN + EXP_FRAC)
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/*
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Internal calculations may require left shifting of
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numbers by INT_FRAC bits, so be aware that the higher
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bits of numbers may be lost if multiplying or dividing
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large numbers.
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These are the safe upper limits for various internal
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significand and fraction combinations in bits.
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+----------+----------+-------------+
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| INT_SIGN | INT_FRAC | Upper Limit |
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+----------+----------+-------------+
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| 64 | 0 | 2^63-1 |
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| 56 | 8 | 2^47-1 |
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| 48 | 16 | 2^31-1 |
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| 40 | 24 | 2^15-1 |
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+----------+----------+-------------+
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*/
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/* Definitions for flex and bison */
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#ifndef TOKEN_LEN
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#define TOKEN_LEN 256
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#endif /* TOKEN_LEN */
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#define TOKENS 128
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#define IO_BUFFER (TOKENS * TOKEN_LEN)
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typedef enum
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{
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TT_LABEL, TT_EXPRESSION, TT_DEFAULT, TT_WHITE_SPACE, TT_END_OF_LINE
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} TOKEN_TYPE;
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typedef struct
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{
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TOKEN_TYPE type;
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char text[TOKEN_LEN];
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} TOKEN;
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extern long long result;
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int yyparse (void);
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void yyerror(char const *s);
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int tokenizeInput(const char *cursor, TOKEN *tokens);
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long long parseCommon(const char *input);
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long long shiftCommon(long long base, long long amount);
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#endif /* __XAPP_H */
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