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vim-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.

73dfe917ba
This commit is contained in:
Michael Ennen
2016-10-23 17:38:28 -07:00
parent b5dfdf0669
commit 6bc0d9b8c7
3 changed files with 25 additions and 13 deletions
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10
src/nvim/eval.c
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@@ -15772,8 +15772,14 @@ static void f_strcharpart(typval_T *argvars, typval_T *rettv, FunPtr fptr) {
if (argvars[2].v_type != VAR_UNKNOWN) {
charlen = get_tv_number(&argvars[2]);
while (charlen > 0 && nbyte + len < slen) {
len += mb_char2len(p[nbyte + len]);
charlen--;
int off = nbyte + len;
if (off < 0) {
len += 1;
} else {
len += mb_char2len(p[off]);
charlen--;
}
}
} else {
len = slen - nbyte; // default: all bytes that are available.