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[Backport release-0.9] fix(tui): use buflen to calculate remaining buffer size (#26943)

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fix(tui): use buflen to calculate remaining buffer size (#26942)

buf is a pointer argument, not a local char array, so sizeof(buf) is just the size of a pointer type on the platform.  This is always an incorrect value, but on 32-bit platforms it actually has an impact, since sizeof(buf) is just 4 and causes the buffer to get truncated.

(cherry picked from commit 367e52cc79)

Co-authored-by: James McCoy <jamessan@jamessan.com>
This commit is contained in:
github-actions[bot]
2024-01-07 14:59:20 -05:00
committed by GitHub
parent 5fe8029cf3
commit f2caaad78e
1 changed files with 3 additions and 3 deletions
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6
src/nvim/tui/input.c
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@@ -237,13 +237,13 @@ static size_t handle_termkey_modifiers(TermKeyKey *key, char *buf, size_t buflen
{
size_t len = 0;
if (key->modifiers & TERMKEY_KEYMOD_SHIFT) { // Shift
len += (size_t)snprintf(buf + len, sizeof(buf) - len, "S-");
len += (size_t)snprintf(buf + len, buflen - len, "S-");
}
if (key->modifiers & TERMKEY_KEYMOD_ALT) { // Alt
len += (size_t)snprintf(buf + len, sizeof(buf) - len, "A-");
len += (size_t)snprintf(buf + len, buflen - len, "A-");
}
if (key->modifiers & TERMKEY_KEYMOD_CTRL) { // Ctrl
len += (size_t)snprintf(buf + len, sizeof(buf) - len, "C-");
len += (size_t)snprintf(buf + len, buflen - len, "C-");
}
assert(len < buflen);
return len;