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authorJunio C Hamano <gitster@pobox.com>2010-05-09 05:33:08 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-05-09 05:33:08 (GMT)
commitdd75d07899653258587b854ce0e3f7f1b90610cf (patch)
treed95fd2d3ec348a0304717f58f0b4c8931908e760 /diff.c
parent3ecaa3b6a5f707617ea610d727c696f43f8b2f0b (diff)
parentb3373982667dc983b8dacf33861d25b20bafb995 (diff)
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Merge branch 'jk/cached-textconv'
* jk/cached-textconv: diff: avoid useless filespec population diff: cache textconv output textconv: refactor calls to run_textconv introduce notes-cache interface make commit_tree a library function
Diffstat (limited to 'diff.c')
-rw-r--r--diff.c119
1 files changed, 73 insertions, 46 deletions
diff --git a/diff.c b/diff.c
index e40c127..e49f14a 100644
--- a/diff.c
+++ b/diff.c
@@ -44,7 +44,8 @@ static char diff_colors[][COLOR_MAXLEN] = {
};
static void diff_filespec_load_driver(struct diff_filespec *one);
-static char *run_textconv(const char *, struct diff_filespec *, size_t *);
+static size_t fill_textconv(struct userdiff_driver *driver,
+ struct diff_filespec *df, char **outbuf);
static int parse_diff_color_slot(const char *var, int ofs)
{
@@ -466,8 +467,8 @@ static void emit_rewrite_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
struct diff_filespec *two,
- const char *textconv_one,
- const char *textconv_two,
+ struct userdiff_driver *textconv_one,
+ struct userdiff_driver *textconv_two,
struct diff_options *o)
{
int lc_a, lc_b;
@@ -478,7 +479,7 @@ static void emit_rewrite_diff(const char *name_a,
const char *reset = diff_get_color(color_diff, DIFF_RESET);
static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT;
const char *a_prefix, *b_prefix;
- const char *data_one, *data_two;
+ char *data_one, *data_two;
size_t size_one, size_two;
struct emit_callback ecbdata;
@@ -500,26 +501,8 @@ static void emit_rewrite_diff(const char *name_a,
quote_two_c_style(&a_name, a_prefix, name_a, 0);
quote_two_c_style(&b_name, b_prefix, name_b, 0);
- diff_populate_filespec(one, 0);
- diff_populate_filespec(two, 0);
- if (textconv_one) {
- data_one = run_textconv(textconv_one, one, &size_one);
- if (!data_one)
- die("unable to read files to diff");
- }
- else {
- data_one = one->data;
- size_one = one->size;
- }
- if (textconv_two) {
- data_two = run_textconv(textconv_two, two, &size_two);
- if (!data_two)
- die("unable to read files to diff");
- }
- else {
- data_two = two->data;
- size_two = two->size;
- }
+ size_one = fill_textconv(textconv_one, one, &data_one);
+ size_two = fill_textconv(textconv_two, two, &data_two);
memset(&ecbdata, 0, sizeof(ecbdata));
ecbdata.color_diff = color_diff;
@@ -1585,14 +1568,26 @@ void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const
options->b_prefix = b;
}
-static const char *get_textconv(struct diff_filespec *one)
+static struct userdiff_driver *get_textconv(struct diff_filespec *one)
{
if (!DIFF_FILE_VALID(one))
return NULL;
if (!S_ISREG(one->mode))
return NULL;
diff_filespec_load_driver(one);
- return one->driver->textconv;
+ if (!one->driver->textconv)
+ return NULL;
+
+ if (one->driver->textconv_want_cache && !one->driver->textconv_cache) {
+ struct notes_cache *c = xmalloc(sizeof(*c));
+ struct strbuf name = STRBUF_INIT;
+
+ strbuf_addf(&name, "textconv/%s", one->driver->name);
+ notes_cache_init(c, name.buf, one->driver->textconv);
+ one->driver->textconv_cache = c;
+ }
+
+ return one->driver;
}
static void builtin_diff(const char *name_a,
@@ -1609,7 +1604,8 @@ static void builtin_diff(const char *name_a,
const char *set = diff_get_color_opt(o, DIFF_METAINFO);
const char *reset = diff_get_color_opt(o, DIFF_RESET);
const char *a_prefix, *b_prefix;
- const char *textconv_one = NULL, *textconv_two = NULL;
+ struct userdiff_driver *textconv_one = NULL;
+ struct userdiff_driver *textconv_two = NULL;
struct strbuf header = STRBUF_INIT;
if (DIFF_OPT_TST(o, SUBMODULE_LOG) &&
@@ -1683,12 +1679,11 @@ static void builtin_diff(const char *name_a,
}
}
- if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
- die("unable to read files to diff");
-
if (!DIFF_OPT_TST(o, TEXT) &&
- ( (diff_filespec_is_binary(one) && !textconv_one) ||
- (diff_filespec_is_binary(two) && !textconv_two) )) {
+ ( (!textconv_one && diff_filespec_is_binary(one)) ||
+ (!textconv_two && diff_filespec_is_binary(two)) )) {
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
/* Quite common confusing case */
if (mf1.size == mf2.size &&
!memcmp(mf1.ptr, mf2.ptr, mf1.size))
@@ -1715,20 +1710,8 @@ static void builtin_diff(const char *name_a,
strbuf_reset(&header);
}
- if (textconv_one) {
- size_t size;
- mf1.ptr = run_textconv(textconv_one, one, &size);
- if (!mf1.ptr)
- die("unable to read files to diff");
- mf1.size = size;
- }
- if (textconv_two) {
- size_t size;
- mf2.ptr = run_textconv(textconv_two, two, &size);
- if (!mf2.ptr)
- die("unable to read files to diff");
- mf2.size = size;
- }
+ mf1.size = fill_textconv(textconv_one, one, &mf1.ptr);
+ mf2.size = fill_textconv(textconv_two, two, &mf2.ptr);
pe = diff_funcname_pattern(one);
if (!pe)
@@ -3912,3 +3895,47 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec,
return strbuf_detach(&buf, outsize);
}
+
+static size_t fill_textconv(struct userdiff_driver *driver,
+ struct diff_filespec *df,
+ char **outbuf)
+{
+ size_t size;
+
+ if (!driver || !driver->textconv) {
+ if (!DIFF_FILE_VALID(df)) {
+ *outbuf = "";
+ return 0;
+ }
+ if (diff_populate_filespec(df, 0))
+ die("unable to read files to diff");
+ *outbuf = df->data;
+ return df->size;
+ }
+
+ if (driver->textconv_cache) {
+ *outbuf = notes_cache_get(driver->textconv_cache, df->sha1,
+ &size);
+ if (*outbuf)
+ return size;
+ }
+
+ *outbuf = run_textconv(driver->textconv, df, &size);
+ if (!*outbuf)
+ die("unable to read files to diff");
+
+ if (driver->textconv_cache) {
+ /* ignore errors, as we might be in a readonly repository */
+ notes_cache_put(driver->textconv_cache, df->sha1, *outbuf,
+ size);
+ /*
+ * we could save up changes and flush them all at the end,
+ * but we would need an extra call after all diffing is done.
+ * Since generating a cache entry is the slow path anyway,
+ * this extra overhead probably isn't a big deal.
+ */
+ notes_cache_write(driver->textconv_cache);
+ }
+
+ return size;
+}