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patch 9.0.0220: invalid memory access with for loop over NULL string

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Problem:    Invalid memory access with for loop over NULL string.
Solution:   Make sure mb_ptr2len() consistently returns zero for NUL.
This commit is contained in:
Bram Moolenaar
2022-08-16 17:50:38 +01:00
parent 948a3894d9
commit f6d39c31d2
4 changed files with 29 additions and 9 deletions
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3
src/globals.h
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@@ -1035,7 +1035,8 @@ EXTERN vimconv_T output_conv; // type of output conversion
* (DBCS).
* The value is set in mb_init();
*/
// length of char in bytes, including following composing chars
// Length of char in bytes, including any following composing chars.
// NUL has length zero.
EXTERN int (*mb_ptr2len)(char_u *p) INIT(= latin_ptr2len);
// idem, with limit on string length