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- /* $Id$ */
- /* expression operators. Do not change values, as they are used as
- indices into arrays.
- */
- #define E_NOT 1
- #define E_DEREF 2
- #define E_AND 3
- #define E_OR 4
- #define E_DIV 5 /* equal to truncated quotient */
- #define E_MOD 6 /* x = (x E_DIV y) * y + x E_MOD y,
- 0 <= (x E_MOD y) < y
- */
- #define E_ZDIV 7 /* quotient rounded to 0 */
- #define E_ZMOD 8 /* remainder of E_ZDIV */
- #define E_IN 9 /* set membership */
- #define E_ARRAY 10
- #define E_PLUS 11
- #define E_MIN 12
- #define E_MUL 13
- #define E_EQUAL 14
- #define E_NOTEQUAL 15
- #define E_LTEQUAL 16
- #define E_GTEQUAL 17
- #define E_LT 18
- #define E_GT 19
- #define E_SELECT 20
- #define E_BAND 21 /* bitwise and */
- #define E_BOR 22 /* bitwise or */
- #define E_BXOR 23
- #define E_BNOT 24
- #define E_DERSELECT 25 /* -> in C */
- #define E_LSFT 26
- #define E_RSFT 27
- #define E_ADDR 28
- /* long get_int(char *buf, long size, int class)
- Returns the value of size 'size', residing in 'buf', of 'class'
- T_INTEGER, T_UNSIGNED, or T_ENUM.
- */
- extern long get_int();
- /* int put_int(char *buf, long size, long value)
- Stores the value 'value' of size 'size' in 'buf'.
- */
- extern int put_int();
- /* double get_real(char *buf, long size)
- Returns the real value of size 'size', residing in 'buf'.
- T_INTEGER, T_UNSIGNED, or T_ENUM.
- */
- extern double get_real();
- /* int put_real(char *buf, long size, double value)
- Stores the value 'value' of size 'size' in 'buf'.
- */
- extern int put_real();
- /* int eval_cond(p_tree p)
- This routine evaluates the conditional expression indicated by p
- and returns 1 if it evaluates to TRUE, or 0 if it could not be
- evaluated for some reason or if it evalutes to FALSE.
- If the expression cannot be evaluated, an error message is given.
- */
- extern int eval_cond();
- /* int eval_desig(p_tree p, t_addr *pbuf, long **psize, p_type *ptp)
- This routine evaluates the expression indicated by p, which should
- result in a designator. The result of the expression is an address
- which is to be found in *pbuf. *psize will contain the size of the
- designated object, and *ptp its type.
- If the expression cannot be evaluated or does not result in a
- designator, 0 is returned and an error message is given.
- Otherwise, 1 is returned.
- */
- extern int eval_desig();
- /* int eval_expr(p_tree p, char **pbuf, long **psize, p_type *ptp)
- This routine evaluates the expression indicated by p.
- The result of the expression is left in *pbuf.
- *psize will contain the size of the value, and *ptp its type.
- If the expression cannot be evaluated, 0 is returned and an error
- message is given. Otherwise, 1 is returned.
- */
- extern int eval_expr();
- /* int convert(char **pbuf, long *psize, p_type *ptp, p_type tp, long size)
- This routine tries to convert the value in pbuf of size psize
- and type ptp to type tp with size size. It returns 0 if this fails,
- while producing an error message. Otherwise, it returns 1 and
- the resulting value, type and size are left in pbuf, ptp, and
- psize, respectively.
- */
- extern int convert();
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