Using FLEX_ARRAY macros reduces the amount of manual
computation size we have to do. It also ensures we don't
overflow size_t, and it makes sure we write the same number
of bytes that we allocated.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
attr.c | 4 +---
builtin/blame.c | 4 +---
builtin/help.c | 9 +++------
builtin/mktree.c | 9 +++++----
builtin/reflog.c | 7 ++-----
cache-tree.c | 4 +---
combine-diff.c | 4 +---
diff.c | 7 ++-----
dir.c | 16 +++-------------
hashmap.c | 3 +--
help.c | 6 ++----
log-tree.c | 5 ++---
name-hash.c | 3 +--
ref-filter.c | 6 ++----
refs.c | 6 ++----
refs/files-backend.c | 19 +++++--------------
remote.c | 5 +----
17 files changed, 35 insertions(+), 82 deletions(-)
diff --git a/attr.c b/attr.c
index c83ec49..6537a43 100644
--- a/attr.c
+++ b/attr.c
@@ -93,9 +93,7 @@ static struct git_attr *git_attr_internal(const char *name, int len)
if (invalid_attr_name(name, len))
return NULL;
- a = xmalloc(sizeof(*a) + len + 1);
- memcpy(a->name, name, len);
- a->name[len] = 0;
+ FLEX_ALLOC_MEM(a, name, name, len);
a->h = hval;
a->next = git_attr_hash[pos];
a->attr_nr = attr_nr++;
diff --git a/builtin/blame.c b/builtin/blame.c
index b4ed462..e982fb8 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -466,13 +466,11 @@ static void queue_blames(struct scoreboard *sb, struct origin *porigin,
static struct origin *make_origin(struct commit *commit, const char *path)
{
struct origin *o;
- size_t pathlen = strlen(path) + 1;
- o = xcalloc(1, sizeof(*o) + pathlen);
+ FLEX_ALLOC_STR(o, path, path);
o->commit = commit;
o->refcnt = 1;
o->next = commit->util;
commit->util = o;
- memcpy(o->path, path, pathlen); /* includes NUL */
return o;
}
diff --git a/builtin/help.c b/builtin/help.c
index 1cd0c1e..3c55ce4 100644
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -171,12 +171,10 @@ static void exec_man_cmd(const char *cmd, const char *page)
static void add_man_viewer(const char *name)
{
struct man_viewer_list **p = &man_viewer_list;
- size_t len = strlen(name);
while (*p)
p = &((*p)->next);
- *p = xcalloc(1, (sizeof(**p) + len + 1));
- memcpy((*p)->name, name, len); /* NUL-terminated by xcalloc */
+ FLEX_ALLOC_STR(*p, name, name);
}
static int supported_man_viewer(const char *name, size_t len)
@@ -190,9 +188,8 @@ static void do_add_man_viewer_info(const char *name,
size_t len,
const char *value)
{
- struct man_viewer_info_list *new = xcalloc(1, sizeof(*new) + len + 1);
-
- memcpy(new->name, name, len); /* NUL-terminated by xcalloc */
+ struct man_viewer_info_list *new;
+ FLEX_ALLOC_MEM(new, name, name, len);
new->info = xstrdup(value);
new->next = man_viewer_info_list;
man_viewer_info_list = new;
diff --git a/builtin/mktree.c b/builtin/mktree.c
index a237caa..4282b62 100644
--- a/builtin/mktree.c
+++ b/builtin/mktree.c
@@ -19,16 +19,17 @@ static int alloc, used;
static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
{
struct treeent *ent;
- int len = strlen(path);
+ size_t len = strlen(path);
if (strchr(path, '/'))
die("path %s contains slash", path);
- ALLOC_GROW(entries, used + 1, alloc);
- ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
+ FLEX_ALLOC_MEM(ent, name, path, len);
ent->mode = mode;
ent->len = len;
hashcpy(ent->sha1, sha1);
- memcpy(ent->name, path, len+1);
+
+ ALLOC_GROW(entries, used + 1, alloc);
+ entries[used++] = ent;
}
static int ent_compare(const void *a_, const void *b_)
diff --git a/builtin/reflog.c b/builtin/reflog.c
index f39960e..7c1990f 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -382,11 +382,9 @@ static int collect_reflog(const char *ref, const struct object_id *oid, int unus
{
struct collected_reflog *e;
struct collect_reflog_cb *cb = cb_data;
- size_t namelen = strlen(ref);
- e = xmalloc(sizeof(*e) + namelen + 1);
+ FLEX_ALLOC_STR(e, reflog, ref);
hashcpy(e->sha1, oid->hash);
- memcpy(e->reflog, ref, namelen + 1);
ALLOC_GROW(cb->e, cb->nr + 1, cb->alloc);
cb->e[cb->nr++] = e;
return 0;
@@ -412,8 +410,7 @@ static struct reflog_expire_cfg *find_cfg_ent(const char *pattern, size_t len)
!memcmp(ent->pattern, pattern, len))
return ent;
- ent = xcalloc(1, (sizeof(*ent) + len));
- memcpy(ent->pattern, pattern, len);
+ FLEX_ALLOC_MEM(ent, pattern, pattern, len);
ent->len = len;
*reflog_expire_cfg_tail = ent;
reflog_expire_cfg_tail = &(ent->next);
diff --git a/cache-tree.c b/cache-tree.c
index 20ee7b5..3ebf9c3 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -79,11 +79,9 @@ static struct cache_tree_sub *find_subtree(struct cache_tree *it,
ALLOC_GROW(it->down, it->subtree_nr + 1, it->subtree_alloc);
it->subtree_nr++;
- down = xmalloc(sizeof(*down) + pathlen + 1);
+ FLEX_ALLOC_MEM(down, name, path, pathlen);
down->cache_tree = NULL;
down->namelen = pathlen;
- memcpy(down->name, path, pathlen);
- down->name[pathlen] = 0;
if (pos < it->subtree_nr)
memmove(it->down + pos + 1,
diff --git a/combine-diff.c b/combine-diff.c
index 890c415..be09a2b 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -319,7 +319,7 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
if (line[len-1] == '\n')
len--;
- lline = xmalloc(sizeof(*lline) + len + 1);
+ FLEX_ALLOC_MEM(lline, line, line, len);
lline->len = len;
lline->next = NULL;
lline->prev = sline->plost.lost_tail;
@@ -330,8 +330,6 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
sline->plost.lost_tail = lline;
sline->plost.len++;
lline->parent_map = this_mask;
- memcpy(lline->line, line, len);
- lline->line[len] = 0;
}
struct combine_diff_state {
diff --git a/diff.c b/diff.c
index 2136b69..27d14a7 100644
--- a/diff.c
+++ b/diff.c
@@ -2607,12 +2607,9 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
struct diff_filespec *alloc_filespec(const char *path)
{
- int namelen = strlen(path);
- struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1);
+ struct diff_filespec *spec;
- memset(spec, 0, sizeof(*spec));
- spec->path = (char *)(spec + 1);
- memcpy(spec->path, path, namelen+1);
+ FLEXPTR_ALLOC_STR(spec, path, path);
spec->count = 1;
spec->is_binary = -1;
return spec;
diff --git a/dir.c b/dir.c
index 6c627d5..f06ebb7 100644
--- a/dir.c
+++ b/dir.c
@@ -503,12 +503,7 @@ void add_exclude(const char *string, const char *base,
parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
if (flags & EXC_FLAG_MUSTBEDIR) {
- char *s;
- x = xmalloc(sizeof(*x) + patternlen + 1);
- s = (char *)(x+1);
- memcpy(s, string, patternlen);
- s[patternlen] = '\0';
- x->pattern = s;
+ FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
} else {
x = xmalloc(sizeof(*x));
x->pattern = string;
@@ -625,10 +620,7 @@ static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
}
uc->dir_created++;
- d = xmalloc(sizeof(*d) + len + 1);
- memset(d, 0, sizeof(*d));
- memcpy(d->name, name, len);
- d->name[len] = '\0';
+ FLEX_ALLOC_MEM(d, name, name, len);
ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
memmove(dir->dirs + first + 1, dir->dirs + first,
@@ -1167,10 +1159,8 @@ static struct dir_entry *dir_entry_new(const char *pathname, int len)
{
struct dir_entry *ent;
- ent = xmalloc(sizeof(*ent) + len + 1);
+ FLEX_ALLOC_MEM(ent, name, pathname, len);
ent->len = len;
- memcpy(ent->name, pathname, len);
- ent->name[len] = 0;
return ent;
}
diff --git a/hashmap.c b/hashmap.c
index f693839..b10b642 100644
--- a/hashmap.c
+++ b/hashmap.c
@@ -256,10 +256,9 @@ const void *memintern(const void *data, size_t len)
e = hashmap_get(&map, &key, data);
if (!e) {
/* not found: create it */
- e = xmallocz(sizeof(struct pool_entry) + len);
+ FLEX_ALLOC_MEM(e, data, data, len);
hashmap_entry_init(e, key.ent.hash);
e->len = len;
- memcpy(e->data, data, len);
hashmap_add(&map, e);
}
return e->data;
diff --git a/help.c b/help.c
index d996b34..19328ea 100644
--- a/help.c
+++ b/help.c
@@ -11,11 +11,9 @@
void add_cmdname(struct cmdnames *cmds, const char *name, int len)
{
- struct cmdname *ent = xmalloc(sizeof(*ent) + len + 1);
-
+ struct cmdname *ent;
+ FLEX_ALLOC_MEM(ent, name, name, len);
ent->len = len;
- memcpy(ent->name, name, len);
- ent->name[len] = 0;
ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
cmds->names[cmds->cnt++] = ent;
diff --git a/log-tree.c b/log-tree.c
index f70a30e..60f9839 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -77,9 +77,8 @@ int parse_decorate_color_config(const char *var, const char *slot_name, const ch
void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
{
- int nlen = strlen(name);
- struct name_decoration *res = xmalloc(sizeof(*res) + nlen + 1);
- memcpy(res->name, name, nlen + 1);
+ struct name_decoration *res;
+ FLEX_ALLOC_STR(res, name, name);
res->type = type;
res->next = add_decoration(&name_decoration, obj, res);
}
diff --git a/name-hash.c b/name-hash.c
index 332ba95..6d9f23e 100644
--- a/name-hash.c
+++ b/name-hash.c
@@ -55,10 +55,9 @@ static struct dir_entry *hash_dir_entry(struct index_state *istate,
dir = find_dir_entry(istate, ce->name, namelen);
if (!dir) {
/* not found, create it and add to hash table */
- dir = xcalloc(1, sizeof(struct dir_entry) + namelen + 1);
+ FLEX_ALLOC_MEM(dir, name, ce->name, namelen);
hashmap_entry_init(dir, memihash(ce->name, namelen));
dir->namelen = namelen;
- strncpy(dir->name, ce->name, namelen);
hashmap_add(&istate->dir_hash, dir);
/* recursively add missing parent directories */
diff --git a/ref-filter.c b/ref-filter.c
index f097176..9ccfc51 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1255,10 +1255,8 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
const unsigned char *objectname,
int flag)
{
- size_t len = strlen(refname);
- struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item) + len + 1);
- memcpy(ref->refname, refname, len);
- ref->refname[len] = '\0';
+ struct ref_array_item *ref;
+ FLEX_ALLOC_STR(ref, refname, refname);
hashcpy(ref->objectname, objectname);
ref->flag = flag;
diff --git a/refs.c b/refs.c
index 1d9e2a7..2d86445 100644
--- a/refs.c
+++ b/refs.c
@@ -761,10 +761,8 @@ void ref_transaction_free(struct ref_transaction *transaction)
static struct ref_update *add_update(struct ref_transaction *transaction,
const char *refname)
{
- size_t len = strlen(refname) + 1;
- struct ref_update *update = xcalloc(1, sizeof(*update) + len);
-
- memcpy((char *)update->refname, refname, len); /* includes NUL */
+ struct ref_update *update;
+ FLEX_ALLOC_STR(update, refname, refname);
ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
transaction->updates[transaction->nr++] = update;
return update;
diff --git a/refs/files-backend.c b/refs/files-backend.c
index b569762..81f68f8 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -199,17 +199,14 @@ static struct ref_entry *create_ref_entry(const char *refname,
const unsigned char *sha1, int flag,
int check_name)
{
- int len;
struct ref_entry *ref;
if (check_name &&
check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
die("Reference has invalid format: '%s'", refname);
- len = strlen(refname) + 1;
- ref = xmalloc(sizeof(struct ref_entry) + len);
+ FLEX_ALLOC_STR(ref, name, refname);
hashcpy(ref->u.value.oid.hash, sha1);
oidclr(&ref->u.value.peeled);
- memcpy(ref->name, refname, len);
ref->flag = flag;
return ref;
}
@@ -268,9 +265,7 @@ static struct ref_entry *create_dir_entry(struct ref_cache *ref_cache,
int incomplete)
{
struct ref_entry *direntry;
- direntry = xcalloc(1, sizeof(struct ref_entry) + len + 1);
- memcpy(direntry->name, dirname, len);
- direntry->name[len] = '\0';
+ FLEX_ALLOC_MEM(direntry, name, dirname, len);
direntry->u.subdir.ref_cache = ref_cache;
direntry->flag = REF_DIR | (incomplete ? REF_INCOMPLETE : 0);
return direntry;
@@ -939,13 +934,10 @@ static void clear_loose_ref_cache(struct ref_cache *refs)
*/
static struct ref_cache *create_ref_cache(const char *submodule)
{
- int len;
struct ref_cache *refs;
if (!submodule)
submodule = "";
- len = strlen(submodule) + 1;
- refs = xcalloc(1, sizeof(struct ref_cache) + len);
- memcpy(refs->name, submodule, len);
+ FLEX_ALLOC_STR(refs, name, submodule);
refs->next = submodule_ref_caches;
submodule_ref_caches = refs;
return refs;
@@ -2197,10 +2189,9 @@ static int pack_if_possible_fn(struct ref_entry *entry, void *cb_data)
/* Schedule the loose reference for pruning if requested. */
if ((cb->flags & PACK_REFS_PRUNE)) {
- int namelen = strlen(entry->name) + 1;
- struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
+ struct ref_to_prune *n;
+ FLEX_ALLOC_STR(n, name, entry->name);
hashcpy(n->sha1, entry->u.value.oid.hash);
- memcpy(n->name, entry->name, namelen); /* includes NUL */
n->next = cb->ref_to_prune;
cb->ref_to_prune = n;
}
diff --git a/remote.c b/remote.c
index 02e698a..25a960f 100644
--- a/remote.c
+++ b/remote.c
@@ -2136,16 +2136,13 @@ static int one_local_ref(const char *refname, const struct object_id *oid,
{
struct ref ***local_tail = cb_data;
struct ref *ref;
- int len;
/* we already know it starts with refs/ to get here */
if (check_refname_format(refname + 5, 0))
return 0;
- len = strlen(refname) + 1;
- ref = xcalloc(1, sizeof(*ref) + len);
+ ref = alloc_ref(refname);
oidcpy(&ref->new_oid, oid);
- memcpy(ref->name, refname, len);
**local_tail = ref;
*local_tail = &ref->next;
return 0;
--
2.7.1.572.gf718037
--
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