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apply: introduce macro and function to init images

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We're about to convert the `struct image` to gain a `struct strbuf`
member, which requires more careful initialization than just memsetting
it to zeros. Introduce the `IMAGE_INIT` macro and `image_init()`
function to prepare for this change.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt 2024-09-17 12:08:01 +02:00 committed by Junio C Hamano
parent 2231903778
commit 7db28d0133
1 changed files with 14 additions and 8 deletions
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22
apply.c
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@ -284,11 +284,19 @@ struct image {
struct line *line_allocated;
struct line *line;
};
#define IMAGE_INIT { 0 }
static void image_init(struct image *image)
{
struct image empty = IMAGE_INIT;
memcpy(image, &empty, sizeof(*image));
}
static void image_clear(struct image *image)
{
free(image->buf);
free(image->line_allocated);
image_init(image);
}
static uint32_t hash_line(const char *cp, size_t len)
@ -322,7 +330,7 @@ static void image_prepare(struct image *image, char *buf, size_t len,
{
const char *cp, *ep;
memset(image, 0, sizeof(*image));
image_clear(image);
image->buf = buf;
image->len = len;
@ -2314,7 +2322,7 @@ static void update_pre_post_images(struct image *preimage,
{
int i, ctx, reduced;
char *new_buf, *old_buf, *fixed;
struct image fixed_preimage;
struct image fixed_preimage = IMAGE_INIT;
/*
* Update the preimage with whitespace fixes. Note that we
@ -2910,11 +2918,9 @@ static int apply_one_fragment(struct apply_state *state,
int hunk_linenr = frag->linenr;
unsigned long leading, trailing;
int pos, applied_pos;
struct image preimage;
struct image postimage;
struct image preimage = IMAGE_INIT;
struct image postimage = IMAGE_INIT;
memset(&preimage, 0, sizeof(preimage));
memset(&postimage, 0, sizeof(postimage));
oldlines = xmalloc(size);
strbuf_init(&newlines, size);
@ -3650,7 +3656,7 @@ static int try_threeway(struct apply_state *state,
size_t len;
int status;
char *img;
struct image tmp_image;
struct image tmp_image = IMAGE_INIT;
/* No point falling back to 3-way merge in these cases */
if (patch->is_delete ||
@ -3727,7 +3733,7 @@ static int try_threeway(struct apply_state *state,
static int apply_data(struct apply_state *state, struct patch *patch,
struct stat *st, const struct cache_entry *ce)
{
struct image image;
struct image image = IMAGE_INIT;
if (load_preimage(state, &image, patch, st, ce) < 0)
return -1;