new api per hf request:

  string2decimal_fixed
  decimal_round(from, to)
  decimal_make_zero
  decimal_string_size
  decimal_neg


strings/decimal.c:
  new api per hf request:
    string2decimal_fixed
    decimal_round(from, to)
    decimal_make_zero

1 files changed, 22 insertions, 1 deletions

diff --git a/include/decimal.h b/include/decimal.h
index fbe507f4049..e1a495f1f2b 100644
--- a/include/decimal.h
+++ b/include/decimal.h
@@ -30,6 +30,7 @@ typedef struct st_decimal {
 
 int decimal2string(decimal *from, char *to, int *to_len);
 int string2decimal(char *from, decimal *to, char **end);
+int string2decimal_fixed(char *from, decimal *to, char **end);
 int decimal2ulonglong(decimal *from, ulonglong *to);
 int ulonglong2decimal(ulonglong from, decimal *to);
 int decimal2longlong(decimal *from, longlong *to);
@@ -49,14 +50,34 @@ int decimal_cmp(decimal *from1, decimal *from2);
 int decimal_mul(decimal *from1, decimal *from2, decimal *to);
 int decimal_div(decimal *from1, decimal *from2, decimal *to, int scale_incr);
 int decimal_mod(decimal *from1, decimal *from2, decimal *to);
-int decimal_round(decimal *dec, int new_scale, dec_round_mode mode);
+int decimal_round(decimal *from, decimal *to, int new_scale, dec_round_mode mode);
 
 /*
   the following works only on special "zero" decimal, not on any
   decimal that happen to evaluate to zero
 */
+
 #define decimal_is_zero(dec) ((dec)->intg1==1 && (dec)->frac1==0 && (dec)->buf[0]==0)
 
+/* set a decimal to zero */
+
+#define decimal_make_zero(dec)        do {                \
+                                        (dec)->buf[0]=0;    \
+                                        (dec)->intg=1;      \
+                                        (dec)->frac=0;      \
+                                        (dec)->sign=0;      \
+                                      } while(0)
+
+/*
+  returns the length of the buffer to hold string representation
+  of the decimal
+*/
+
+#define decimal_string_size(dec) ((dec)->intg + (dec)->frac + ((dec)->frac > 0) + 1)
+
+/* negate a decimal */
+#define decimal_neg(dec) do { (dec)->sign=!(dec)->sign; } while(0)
+
 /*
   conventions: