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patch 9.0.2114: overflow detection not accurate when adding digits

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Problem:  overflow detection not accurate when adding digits
Solution: Use a helper function

Use a helper function to better detect overflows before adding integer
digits to a long or an integer variable respectively. Signal the
overflow to the caller function.

closes: #13539

Signed-off-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Michael Henry <vim@drmikehenry.com>
Signed-off-by: Ernie Rael <errael@raelity.com>
This commit is contained in:
Christian Brabandt
2023-11-19 10:47:21 +01:00
parent 22a97fc241
commit 22cbc8a4e1
4 changed files with 28 additions and 4 deletions
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3
src/normal.c
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@@ -2563,12 +2563,11 @@ nv_z_get_count(cmdarg_T *cap, int *nchar_arg)
n /= 10;
else if (VIM_ISDIGIT(nchar))
{
if (n > LONG_MAX / 10)
if (vim_append_digit_long(&n, nchar - '0') == FAIL)
{
clearopbeep(cap->oap);
break;
}
n = n * 10 + (nchar - '0');
}
else if (nchar == CAR)
{