buffer: consistently use `ENSURE_SIZE` to grow buffers on-demand
The `ENSURE_SIZE` macro can be used to grow a buffer if its currently
allocated size does not suffice a required target size. While most of
the code already uses this macro, the `git_buf_join` and `git_buf_join3`
functions do not yet use it. Due to the macro first checking whether we
have to grow the buffer at all, this has the benefit of saving a
function call when it is not needed. While this is nice to have, it will
probably not matter at all performance-wise -- instead, this only serves
for consistency across the code.
diff --git a/src/buffer.c b/src/buffer.c
index ba8bd82..40bed5c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -724,9 +724,7 @@
GITERR_CHECK_ALLOC_ADD(&alloc_len, strlen_a, strlen_b);
GITERR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, need_sep);
GITERR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 1);
- if (git_buf_grow(buf, alloc_len) < 0)
- return -1;
- assert(buf->ptr);
+ ENSURE_SIZE(buf, alloc_len);
/* fix up internal pointers */
if (offset_a >= 0)
@@ -780,8 +778,7 @@
GITERR_CHECK_ALLOC_ADD(&len_total, len_total, sep_b);
GITERR_CHECK_ALLOC_ADD(&len_total, len_total, len_c);
GITERR_CHECK_ALLOC_ADD(&len_total, len_total, 1);
- if (git_buf_grow(buf, len_total) < 0)
- return -1;
+ ENSURE_SIZE(buf, len_total);
tgt = buf->ptr;
