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patch 7.4.1779

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Problem:    Using negative index in strcharpart(). (Yegappan Lakshmanan)
Solution:   Assume single byte when using a negative iindex.
This commit is contained in:
Bram Moolenaar
2016-04-23 13:54:48 +02:00
parent b2fa54a840
commit 73dfe917ba
2 changed files with 8 additions and 1 deletions
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7
src/eval.c
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@@ -19774,7 +19774,12 @@ f_strcharpart(typval_T *argvars, typval_T *rettv)
charlen = get_tv_number(&argvars[2]);
while (charlen > 0 && nbyte + len < slen)
{
len += mb_char2len(p[nbyte + len]);
int off = nbyte + len;
if (off < 0)
len += 1;
else
len += mb_char2len(p[off]);
--charlen;
}
}