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userdiff: add and use for_each_userdiff_driver()

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Refactor the userdiff_find_by_namelen() function so that a new
for_each_userdiff_driver() API function does most of the work.

This will be useful for the same reason we've got other for_each_*()
API functions as part of various APIs, and will be used in a follow-up
commit.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2021-04-08 17:04:19 +02:00
committed by Junio C Hamano
parent 82512e008c
commit f12fa9ee6c
2 changed files with 71 additions and 12 deletions
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70
userdiff.c
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@ -259,20 +259,33 @@ static struct userdiff_driver driver_false = {
{ NULL, 0 }
};
static struct userdiff_driver *userdiff_find_by_namelen(const char *k, size_t len)
struct find_by_namelen_data {
const char *name;
size_t len;
struct userdiff_driver *driver;
};
static int userdiff_find_by_namelen_cb(struct userdiff_driver *driver,
enum userdiff_driver_type type, void *priv)
{
int i;
for (i = 0; i < ndrivers; i++) {
struct userdiff_driver *drv = drivers + i;
if (!strncmp(drv->name, k, len) && !drv->name[len])
return drv;
struct find_by_namelen_data *cb_data = priv;
if (!strncmp(driver->name, cb_data->name, cb_data->len) &&
!driver->name[cb_data->len]) {
cb_data->driver = driver;
return 1; /* tell the caller to stop iterating */
}
for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
struct userdiff_driver *drv = builtin_drivers + i;
if (!strncmp(drv->name, k, len) && !drv->name[len])
return drv;
}
return NULL;
return 0;
}
static struct userdiff_driver *userdiff_find_by_namelen(const char *name, size_t len)
{
struct find_by_namelen_data udcbdata = {
.name = name,
.len = len,
};
for_each_userdiff_driver(userdiff_find_by_namelen_cb, &udcbdata);
return udcbdata.driver;
}
static int parse_funcname(struct userdiff_funcname *f, const char *k,
@ -379,3 +392,36 @@ struct userdiff_driver *userdiff_get_textconv(struct repository *r,
return driver;
}
static int for_each_userdiff_driver_list(each_userdiff_driver_fn fn,
enum userdiff_driver_type type, void *cb_data,
struct userdiff_driver *drv,
int drv_size)
{
int i;
int ret;
for (i = 0; i < drv_size; i++) {
struct userdiff_driver *item = drv + i;
if ((ret = fn(item, type, cb_data)))
return ret;
}
return 0;
}
int for_each_userdiff_driver(each_userdiff_driver_fn fn, void *cb_data)
{
int ret;
ret = for_each_userdiff_driver_list(fn, USERDIFF_DRIVER_TYPE_CUSTOM,
cb_data, drivers, ndrivers);
if (ret)
return ret;
ret = for_each_userdiff_driver_list(fn, USERDIFF_DRIVER_TYPE_BUILTIN,
cb_data, builtin_drivers,
ARRAY_SIZE(builtin_drivers));
if (ret)
return ret;
return 0;
}