From: Junio C Hamano <gits...@pobox.com>
This updates the other two ways the attribute check is done via an
array of "struct git_attr_check_elem" elements. These two niches
appear only in "git check-attr".
* The caller does not know offhand what attributes it wants to ask
about and cannot use git_attr_check_initl() to prepare the
git_attr_check structure.
* The caller may not know what attributes it wants to ask at all,
and instead wants to learn everything that the given path has.
Such a caller can call git_attr_check_alloc() to allocate an empty
git_attr_check, and then call git_attr_check_append() to add
attribute names one by one. A new attribute can be appended until
git_attr_check structure is "finalized", which happens when it is
used to ask for attributes for any path by calling git_check_attr()
or git_all_attrs(). A git_attr_check structure that is initialized
by git_attr_check_initl() is already finalized when it is returned.
I am not at all happy with the way git_all_attrs() API turned out to
be, but it is only to support one niche caller ("check-attr --all"),
so I'll stop here for now.
Signed-off-by: Junio C Hamano <gits...@pobox.com>
Signed-off-by: Stefan Beller <sbel...@google.com>
---
attr.c | 75 ++++++++++++++++++++++++++++++++++++++--------------
attr.h | 16 ++++++-----
builtin/check-attr.c | 51 ++++++++++++++++++-----------------
3 files changed, 90 insertions(+), 52 deletions(-)
diff --git a/attr.c b/attr.c
index 861e1a2..76f0d6b 100644
--- a/attr.c
+++ b/attr.c
@@ -724,6 +724,11 @@ static int macroexpand_one(int nr, int rem)
return rem;
}
+static int attr_check_is_dynamic(const struct git_attr_check *check)
+{
+ return (void *)(check->check) != (void *)(check + 1);
+}
+
/*
* Collect attributes for path into the array pointed to by
* check_all_attr. If num is non-zero, only attributes in check[] are
@@ -789,32 +794,21 @@ int git_check_attrs(const char *path, int num, struct
git_attr_check_elem *check
return 0;
}
-int git_all_attrs(const char *path, int *num, struct git_attr_check_elem
**check)
+void git_all_attrs(const char *path, struct git_attr_check *check)
{
- int i, count, j;
+ int i;
+ git_attr_check_clear(check);
collect_some_attrs(path, 0, NULL);
- /* Count the number of attributes that are set. */
- count = 0;
- for (i = 0; i < attr_nr; i++) {
- const char *value = check_all_attr[i].value;
- if (value != ATTR__UNSET && value != ATTR__UNKNOWN)
- ++count;
- }
- *num = count;
- ALLOC_ARRAY(*check, count);
- j = 0;
for (i = 0; i < attr_nr; i++) {
+ const char *name = check_all_attr[i].attr->name;
const char *value = check_all_attr[i].value;
- if (value != ATTR__UNSET && value != ATTR__UNKNOWN) {
- (*check)[j].attr = check_all_attr[i].attr;
- (*check)[j].value = value;
- ++j;
- }
+ if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
+ continue;
+ git_attr_check_append(check, git_attr(name));
+ check->check[check->check_nr - 1].value = value;
}
-
- return 0;
}
void git_attr_set_direction(enum git_attr_direction new, struct index_state
*istate)
@@ -832,6 +826,7 @@ void git_attr_set_direction(enum git_attr_direction new,
struct index_state *ist
int git_check_attr(const char *path, struct git_attr_check *check)
{
+ check->finalized = 1;
return git_check_attrs(path, check->check_nr, check->check);
}
@@ -849,17 +844,57 @@ struct git_attr_check *git_attr_check_initl(const char
*one, ...)
check = xcalloc(1,
sizeof(*check) + cnt * sizeof(*(check->check)));
check->check_nr = cnt;
+ check->finalized = 1;
check->check = (struct git_attr_check_elem *)(check + 1);
check->check[0].attr = git_attr(one);
va_start(params, one);
for (cnt = 1; cnt < check->check_nr; cnt++) {
+ struct git_attr *attr;
param = va_arg(params, const char *);
if (!param)
die("BUG: counted %d != ended at %d",
check->check_nr, cnt);
- check->check[cnt].attr = git_attr(param);
+ attr = git_attr(param);
+ if (!attr)
+ die("BUG: %s: not a valid attribute name", param);
+ check->check[cnt].attr = attr;
}
va_end(params);
return check;
}
+
+struct git_attr_check *git_attr_check_alloc(void)
+{
+ return xcalloc(1, sizeof(struct git_attr_check));
+}
+
+struct git_attr_check_elem *git_attr_check_append(struct git_attr_check *check,
+ const struct git_attr *attr)
+{
+ struct git_attr_check_elem *elem;
+ if (check->finalized)
+ die("BUG: append after git_attr_check structure is finalized");
+ if (!attr_check_is_dynamic(check))
+ die("BUG: appending to a statically initialized
git_attr_check");
+ ALLOC_GROW(check->check, check->check_nr + 1, check->check_alloc);
+ elem = &check->check[check->check_nr++];
+ elem->attr = attr;
+ return elem;
+}
+
+void git_attr_check_clear(struct git_attr_check *check)
+{
+ if (!attr_check_is_dynamic(check))
+ die("BUG: clearing a statically initialized git_attr_check");
+ free(check->check);
+ check->check_nr = 0;
+ check->check_alloc = 0;
+ check->finalized = 0;
+}
+
+void git_attr_check_free(struct git_attr_check *check)
+{
+ git_attr_check_clear(check);
+ free(check);
+}
diff --git a/attr.h b/attr.h
index 3fd8690..0d94077 100644
--- a/attr.h
+++ b/attr.h
@@ -30,6 +30,7 @@ struct git_attr_check_elem {
};
struct git_attr_check {
+ int finalized;
int check_nr;
int check_alloc;
struct git_attr_check_elem *check;
@@ -38,6 +39,12 @@ struct git_attr_check {
extern struct git_attr_check *git_attr_check_initl(const char *, ...);
extern int git_check_attr(const char *path, struct git_attr_check *);
+extern struct git_attr_check *git_attr_check_alloc(void);
+extern struct git_attr_check_elem *git_attr_check_append(struct git_attr_check
*, const struct git_attr *);
+
+extern void git_attr_check_clear(struct git_attr_check *);
+extern void git_attr_check_free(struct git_attr_check *);
+
/*
* Return the name of the attribute represented by the argument. The
* return value is a pointer to a null-delimited string that is part
@@ -48,13 +55,10 @@ extern const char *git_attr_name(const struct git_attr *);
int git_check_attrs(const char *path, int, struct git_attr_check_elem *);
/*
- * Retrieve all attributes that apply to the specified path. *num
- * will be set to the number of attributes on the path; **check will
- * be set to point at a newly-allocated array of git_attr_check
- * objects describing the attributes and their values. *check must be
- * free()ed by the caller.
+ * Retrieve all attributes that apply to the specified path.
+ * check holds the attributes and their values.
*/
-int git_all_attrs(const char *path, int *num, struct git_attr_check_elem
**check);
+void git_all_attrs(const char *path, struct git_attr_check *check);
enum git_attr_direction {
GIT_ATTR_CHECKIN,
diff --git a/builtin/check-attr.c b/builtin/check-attr.c
index 97e3837..ec61476 100644
--- a/builtin/check-attr.c
+++ b/builtin/check-attr.c
@@ -24,12 +24,13 @@ static const struct option check_attr_options[] = {
OPT_END()
};
-static void output_attr(int cnt, struct git_attr_check_elem *check,
- const char *file)
+static void output_attr(struct git_attr_check *check, const char *file)
{
int j;
+ int cnt = check->check_nr;
+
for (j = 0; j < cnt; j++) {
- const char *value = check[j].value;
+ const char *value = check->check[j].value;
if (ATTR_TRUE(value))
value = "set";
@@ -42,36 +43,37 @@ static void output_attr(int cnt, struct git_attr_check_elem
*check,
printf("%s%c" /* path */
"%s%c" /* attrname */
"%s%c" /* attrvalue */,
- file, 0, git_attr_name(check[j].attr), 0, value,
0);
+ file, 0,
+ git_attr_name(check->check[j].attr), 0, value,
0);
} else {
quote_c_style(file, NULL, stdout, 0);
- printf(": %s: %s\n", git_attr_name(check[j].attr),
value);
+ printf(": %s: %s\n",
+ git_attr_name(check->check[j].attr), value);
}
-
}
}
static void check_attr(const char *prefix,
- int cnt, struct git_attr_check_elem *check,
+ struct git_attr_check *check,
const char *file)
{
char *full_path =
prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
if (check != NULL) {
- if (git_check_attrs(full_path, cnt, check))
- die("git_check_attrs died");
- output_attr(cnt, check, file);
+ if (git_check_attr(full_path, check))
+ die("git_check_attr died");
+ output_attr(check, file);
} else {
- if (git_all_attrs(full_path, &cnt, &check))
- die("git_all_attrs died");
- output_attr(cnt, check, file);
- free(check);
+ check = git_attr_check_alloc();
+ git_all_attrs(full_path, check);
+ output_attr(check, file);
+ git_attr_check_free(check);
}
free(full_path);
}
static void check_attr_stdin_paths(const char *prefix,
- int cnt, struct git_attr_check_elem *check)
+ struct git_attr_check *check)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf unquoted = STRBUF_INIT;
@@ -85,7 +87,7 @@ static void check_attr_stdin_paths(const char *prefix,
die("line is badly quoted");
strbuf_swap(&buf, &unquoted);
}
- check_attr(prefix, cnt, check, buf.buf);
+ check_attr(prefix, check, buf.buf);
maybe_flush_or_die(stdout, "attribute to stdout");
}
strbuf_release(&buf);
@@ -100,7 +102,7 @@ static NORETURN void error_with_usage(const char *msg)
int cmd_check_attr(int argc, const char **argv, const char *prefix)
{
- struct git_attr_check_elem *check;
+ struct git_attr_check *check;
int cnt, i, doubledash, filei;
if (!is_bare_repository())
@@ -163,24 +165,21 @@ int cmd_check_attr(int argc, const char **argv, const
char *prefix)
if (all_attrs) {
check = NULL;
} else {
- check = xcalloc(cnt, sizeof(*check));
+ check = git_attr_check_alloc();
for (i = 0; i < cnt; i++) {
- const char *name;
- struct git_attr *a;
- name = argv[i];
- a = git_attr(name);
+ struct git_attr *a = git_attr(argv[i]);
if (!a)
return error("%s: not a valid attribute name",
- name);
- check[i].attr = a;
+ argv[i]);
+ git_attr_check_append(check, a);
}
}
if (stdin_paths)
- check_attr_stdin_paths(prefix, cnt, check);
+ check_attr_stdin_paths(prefix, check);
else {
for (i = filei; i < argc; i++)
- check_attr(prefix, cnt, check, argv[i]);
+ check_attr(prefix, check, argv[i]);
maybe_flush_or_die(stdout, "attribute to stdout");
}
return 0;
--
2.10.1.508.g6572022
