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vim-patch:8.0.0219

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Problem:    Ubsan reports errors for integer overflow.
Solution:   Define macros for minimum and maximum values.  Select an
            expression based on the value. (Mike Williams)

7a40ea2138
This commit is contained in:
James McCoy
2017-01-23 12:55:27 -05:00
parent 55c93ea164
commit 2fb0a62553
3 changed files with 40 additions and 13 deletions
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10
src/nvim/eval.c
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@@ -4032,11 +4032,11 @@ eval6 (
else if (op == '/') {
if (n2 == 0) { /* give an error message? */
if (n1 == 0)
n1 = -0x7fffffffffffffff - 1; /* similar to NaN */
n1 = VARNUMBER_MIN; /* similar to NaN */
else if (n1 < 0)
n1 = -0x7fffffffffffffff;
n1 = -VARNUMBER_MAX;
else
n1 = 0x7fffffffffffffff;
n1 = VARNUMBER_MAX;
} else
n1 = n1 / n2;
} else {
@@ -8539,8 +8539,8 @@ static void f_float2nr(typval_T *argvars, typval_T *rettv, FunPtr fptr)
float_T f;
if (tv_get_float_chk(argvars, &f)) {
if (f < VARNUMBER_MIN) {
rettv->vval.v_number = VARNUMBER_MIN;
if (f < -VARNUMBER_MAX) {
rettv->vval.v_number = -VARNUMBER_MAX;
} else if (f > VARNUMBER_MAX) {
rettv->vval.v_number = VARNUMBER_MAX;
} else {