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| author | Bram Moolenaar <Bram@vim.org> | 2019-10-06 20:08:38 +0200 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2019-10-06 20:08:38 +0200 |
| commit | 524f3b19ae16e08350010b5effe38d0637349285 (patch) | |
| tree | d9c8c147f89b0961474a4b5dcda2321bca36a53d /src/macros.h | |
| parent | eb66328bd78c3001d71138306325718cb1c94712 (diff) | |
| download | vim-git-524f3b19ae16e08350010b5effe38d0637349285.tar.gz | |
patch 8.1.2119: memory access error for empty stringv8.1.2119
Problem: memory access error for empty string when 'encoding' is a single
byte encoding.
Solution: Check for empty string when getting the length. (Dominique Pelle,
closes #5021, closes #5007)
Diffstat (limited to 'src/macros.h')
| -rw-r--r-- | src/macros.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/macros.h b/src/macros.h index d685deafb..5e047c873 100644 --- a/src/macros.h +++ b/src/macros.h @@ -230,11 +230,11 @@ * PTR2CHAR(): get character from pointer. */ /* Get the length of the character p points to, including composing chars */ -#define MB_PTR2LEN(p) (has_mbyte ? (*mb_ptr2len)(p) : 1) +#define MB_PTR2LEN(p) (has_mbyte ? (*mb_ptr2len)(p) : (*p == NUL ? 0 : 1)) /* Advance multi-byte pointer, skip over composing chars. */ -#define MB_PTR_ADV(p) p += has_mbyte ? (*mb_ptr2len)(p) : 1 +#define MB_PTR_ADV(p) p += has_mbyte ? (*mb_ptr2len)(p) : (*p == NUL ? 0 : 1) /* Advance multi-byte pointer, do not skip over composing chars. */ -#define MB_CPTR_ADV(p) p += enc_utf8 ? utf_ptr2len(p) : has_mbyte ? (*mb_ptr2len)(p) : 1 +#define MB_CPTR_ADV(p) p += enc_utf8 ? utf_ptr2len(p) : has_mbyte ? (*mb_ptr2len)(p) : (*p == NUL ? 0 : 1) /* Backup multi-byte pointer. Only use with "p" > "s" ! */ #define MB_PTR_BACK(s, p) p -= has_mbyte ? ((*mb_head_off)(s, p - 1) + 1) : 1 /* get length of multi-byte char, not including composing chars */ |