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textconv: refactor calls to run_textconv 

This patch adds a fill_textconv wrapper, which centralizes
some minor logic like error checking and handling the case
of no-textconv.

In addition to dropping the number of lines, this will make
it easier in future patches to handle multiple types of
textconv.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2010-04-01 20:09:26 -04:00 committed by Junio C Hamano
parent a941d5e395
commit 840383b2c2
1 changed files with 30 additions and 36 deletions
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66
diff.c
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@ -43,7 +43,8 @@ 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(const char *cmd,
struct diff_filespec *df, char **outbuf);
static int parse_diff_color_slot(const char *var, int ofs)
{
@ -477,7 +478,7 @@ 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;
@ -499,26 +500,8 @@ 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;
@ -1717,20 +1700,8 @@ 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)
@ -3916,3 +3887,26 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec,
return strbuf_detach(&buf, outsize);
}
static size_t fill_textconv(const char *cmd,
struct diff_filespec *df,
char **outbuf)
{
size_t size;
if (!cmd) {
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;
}
*outbuf = run_textconv(cmd, df, &size);
if (!*outbuf)
die("unable to read files to diff");
return size;
}