btcs

bitcoin script parser/evaluator/compiler/decompiler
git clone git://jb55.com/btcs
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script_num.h (809B)

      1 
      2 #ifndef BTCS_SCRIPTNUM_H
      3 #define BTCS_SCRIPTNUM_H
      4 
      5 #include "misc.h"
      6 #include "val.h"
      7 
      8 enum sn_result {
      9   SN_SUCCESS,
     10   SN_ERR_OVERFLOWED_INT
     11 };
     12 
     13 struct num {
     14   s64 val;
     15   int ind;
     16 };
     17 
     18 void
     19 sn_from_int(s64 n, struct num *);
     20 
     21 int
     22 sn_overflowed(struct num *num);
     23 
     24 enum sn_result
     25 sn_from_val(struct val val, struct num ** sn);
     26 
     27 struct val
     28 sn_to_val(struct num *sn);
     29 
     30 int
     31 sn_to_int(struct num *sn, int require_minimal);
     32 
     33 void
     34 sn_serialize(struct num *sn, u8 *buf, int bufsize, u16 *len);
     35 
     36 
     37 inline static void sn_add(struct num *a, struct num *b, struct num *c) {
     38   c->val = a->val + b->val;
     39 }
     40 
     41 inline static void sn_sub(struct num *a, struct num *b, struct num *c) {
     42   c->val = a->val - b->val;
     43 }
     44 
     45 inline static void sn_neg(struct num *a, struct num *b) {
     46   b->val = -(a->val);
     47 }
     48 
     49 
     50 #endif /* BTCS_SCRIPTNUM_H */