refactor get_textconv to not require diff_filespec

This function actually does two things: 1. Load the userdiff driver for the filespec. 2. Decide whether the driver has a textconv component, and initialize the textconv cache if applicable. Only part (1) requires the filespec object, and some callers may not have a filespec at all. So let's split them it into two functions, and put part (2) with the userdiff code, which is a better fit. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jeff King committed May 23, 2011 at 16:30 UTC 3813e69031d2df2702f50b9649fa2e40ea11e558
3 files changed +20 -13
diff.c
+1 -13
@@ -1976,19 +1976,7 @@ struct userdiff_driver *get_textconv(struct diff_filespec *one)
1976 return NULL;
1977
1978 diff_filespec_load_driver(one);
1979 - if (!one->driver->textconv)
1980 - return NULL;
1981 -
1982 - if (one->driver->textconv_want_cache && !one->driver->textconv_cache) {
1983 - struct notes_cache *c = xmalloc(sizeof(*c));
1984 - struct strbuf name = STRBUF_INIT;
1985 -
1986 - strbuf_addf(&name, "textconv/%s", one->driver->name);
1987 - notes_cache_init(c, name.buf, one->driver->textconv);
1988 - one->driver->textconv_cache = c;
1989 - }
1990 -
1991 - return one->driver;
1979 + return userdiff_get_textconv(one->driver);
1980 }
1981
1982 static void builtin_diff(const char *name_a,
userdiff.c
+17
@@ -267,3 +267,20 @@ struct userdiff_driver *userdiff_find_by_path(const char *path)
267 return NULL;
268 return userdiff_find_by_name(check.value);
269 }
270 +
271 +struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver)
272 +{
273 + if (!driver->textconv)
274 + return NULL;
275 +
276 + if (driver->textconv_want_cache && !driver->textconv_cache) {
277 + struct notes_cache *c = xmalloc(sizeof(*c));
278 + struct strbuf name = STRBUF_INIT;
279 +
280 + strbuf_addf(&name, "textconv/%s", driver->name);
281 + notes_cache_init(c, name.buf, driver->textconv);
282 + driver->textconv_cache = c;
283 + }
284 +
285 + return driver;
286 +}
userdiff.h
+2
@@ -23,4 +23,6 @@ int userdiff_config(const char *k, const char *v);
23 struct userdiff_driver *userdiff_find_by_name(const char *name);
24 struct userdiff_driver *userdiff_find_by_path(const char *path);
25
26 +struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver);
27 +
28 #endif /* USERDIFF */