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vim-patch:9.0.1271: using sizeof() and subtract array size is tricky (#22087)

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Problem:    Using sizeof() and subtract array size is tricky.
Solution:   Use offsetof() instead. (closes vim/vim#11926)

1b438a8228
This commit is contained in:
zeertzjq
2023-02-01 21:53:32 +08:00
committed by GitHub
parent a26c0ecab6
commit 4cc0d6b854
8 changed files with 10 additions and 9 deletions
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5
src/nvim/memline.c
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@@ -149,7 +149,7 @@ struct data_block {
#define DB_INDEX_MASK (~DB_MARKED)
#define INDEX_SIZE (sizeof(unsigned)) // size of one db_index entry
#define HEADER_SIZE (sizeof(DATA_BL) - INDEX_SIZE) // size of data block header
#define HEADER_SIZE (offsetof(DATA_BL, db_index)) // size of data block header
enum {
B0_FNAME_SIZE_ORG = 900, // what it was in older versions
@@ -2720,7 +2720,8 @@ static bhdr_T *ml_new_ptr(memfile_T *mfp)
PTR_BL *pp = hp->bh_data;
pp->pb_id = PTR_ID;
pp->pb_count = 0;
pp->pb_count_max = (uint16_t)((mfp->mf_page_size - sizeof(PTR_BL)) / sizeof(PTR_EN) + 1);
pp->pb_count_max
= (uint16_t)((mfp->mf_page_size - offsetof(PTR_BL, pb_pointer)) / sizeof(PTR_EN));
return hp;
}