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Merge branch 'jk/cached-textconv'

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* 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
This commit is contained in:
Junio C Hamano
2010-05-08 22:33:08 -07:00
parent 3ecaa3b6a5 b337398266
commit dd75d07899
14 changed files with 403 additions and 118 deletions
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119
diff.c
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@ -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;
}