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backlog: be smarter when changing backlog's size

This commit is contained in:
Boris Faure 2019-11-24 16:14:00 +01:00
parent e6b78bd406
commit 77ab1efb9d
Signed by untrusted user who does not match committer: borisfaure
GPG Key ID: EAA9CD729F522998
1 changed files with 35 additions and 4 deletions
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39
src/bin/backlog.c
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@ -166,21 +166,52 @@ end:
void
termpty_backlog_size_set(Termpty *ty, size_t size)
{
Termsave *new_back;
if (ty->backsize == size)
return;
/* TODO: RESIZE: handle that case better: changing backscroll size */
termpty_backlog_lock();
termpty_backlog_free(ty);
if (size == 0)
{
termpty_backlog_free(ty);
goto end;
}
if (size > 0)
{
ty->back = calloc(1, sizeof(Termsave) * size);
_accounting_change(sizeof(Termsave) * size);
size_t i;
if (size > ty->backsize)
{
new_back = realloc(ty->back, sizeof(Termsave) * size);
if (!new_back)
return;
memset(new_back + ty->backsize, 0,
sizeof(Termsave) * (size - ty->backsize));
ty->back = new_back;
}
else
{
new_back = calloc(1, sizeof(Termsave) * size);
if (!new_back)
return;
for (i = 0; i < size; i++)
new_back[i] = ty->back[i];
for (i = size; i < ty->backsize; i++)
termpty_save_free(ty, &ty->back[i]);
free(ty->back);
ty->back = new_back;
}
_accounting_change(sizeof(Termsave) * (size - ty->backsize));
}
else
ty->back = NULL;
end:
ty->backpos = 0;
ty->backsize = size;
/* Reset beacon */
ty->backlog_beacon.screen_y = 0;
ty->backlog_beacon.backlog_y = 0;
termpty_backlog_unlock();
}