64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
#ifndef FUNC_H
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#define FUNC_H
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#define MAX_FUNC_NAME_LENGTH 20
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typedef enum
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/* The purpose of this enum is to enforce backward compatibility
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of numeric function identifiers which may be recorded in old
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save files. Hence, do NOT change the order of the items in this
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enum, merely add new identifiers at the end, just before
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N_FUNCTION_IDENTIFIERS.
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*/
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{
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NOT_A_FUNCTION = -1,
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FIRST_FUNCTION = 0,
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FUNC_AT_SYMBOL = 0, FUNC_AMPERSAND, FUNC_X, FUNC_Y, FUNC_Z, FUNC_EVAL,
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FUNC_ERROR, FUNC_STRING, FUNC_SUM, FUNC_N, FUNC_INT, FUNC_FRAC, FUNC_LEN,
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FUNC_MIN, FUNC_MAX, FUNC_ABS, FUNC_DOLLAR_SIGN, FUNC_FLOAT, FUNC_STRFTIME,
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FUNC_CLOCK, FUNC_POLY, FUNC_E, FUNC_LOG, FUNC_SIN, FUNC_COS, FUNC_TAN,
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FUNC_SINH, FUNC_COSH, FUNC_TANH, FUNC_ASIN, FUNC_ACOS, FUNC_ATAN,
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FUNC_ARSINH, FUNC_ARCOSH, FUNC_ARTANH, FUNC_DEG2RAD, FUNC_RAD2DEG,
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FUNC_RND, FUNC_SUBSTR, FUNC_STRPTIME, FUNC_TIME, FUNC_BITAND, FUNC_BITOR,
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FUNC_R, FUNC_D, FUNC_CAP_X, FUNC_X_AMPERSAND, FUNC_NEGATE, FUNC_PLUS_SYMBOL,
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FUNC_MINUS_SYMBOL, FUNC_ASTERISK, FUNC_SLASH,
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/* Note use of thes in the macro below */
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FUNC_LESS_EQUAL, FUNC_GREATER_EQUAL, FUNC_LESS_THAN, FUNC_GREATER_THAN,
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FUNC_EQUAL_EQUAL, FUNC_TILDE_EQUAL, FUNC_BANG_EQUAL,
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FUNC_CARET,
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FUNC_PER_CENT, FUNC_CONCAT, FUNC_TAU, FUNC_SQRT, FUNC_FLOOR, FUNC_CEIL,
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FUNC_TRUNC, FUNC_ROUND, FUNC_DECIMAL, FUNC_SCIENTIFIC, FUNC_COMPACT,
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FUNC_HEXACT, FUNC_RIGHT, FUNC_LEFT, FUNC_DOWN, FUNC_UP, FUNC_BELOW, FUNC_ABOVE,
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FUNC_TRUE, FUNC_FALSE, FUNC_AND, FUNC_OR,
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N_FUNCTION_IDS
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} FunctionIdentifier;
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#define IS_RELATION_FUNC(f) (((f) >= FUNC_LESS_EQUAL) && ((f) <= FUNC_BANG_EQUAL))
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/* Forward declaration of Token, since this header is used in scanner.h */
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typedef struct Token_struc Token;
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typedef enum /* In increasing order of precedence */
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{
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NO_PRECEDENCE, INFIX_CONC, INFIX_BOOL, INFIX_REL, INFIX_PLUS, INFIX_MUL,
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PREFIX_NEG, INFIX_POW, PREFIX_FUNC
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} FunctionPrecedence;
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typedef enum { FUNCT, MACRO } EvaluationStrategy;
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typedef struct
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{
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const char name[MAX_FUNC_NAME_LENGTH + 1];
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Token (*func)(FunctionIdentifier self, int, const Token*);
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FunctionPrecedence precedence;
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EvaluationStrategy eval_as;
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const char* display_symbol;
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} Tfunc;
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FunctionIdentifier identcode(const char *s, size_t len);
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extern Tfunc tfunc[];
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#endif
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