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@xxxxxxxx>
---
Similar to 1/3 from the previous series, but fixes some deficiencies
there. Specifically, it handles !DIFF_FILE_VALID and filespec population
better, which makes fill_textconv a full replacement for fill_mmfile,
just with optional textconv-ing.
diff.c | 66 +++++++++++++++++++++++++++++----------------------------------
1 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/diff.c b/diff.c
index db2cd5d..9665d6d 100644
--- a/diff.c
+++ b/diff.c
@@ -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;
+}
--
1.7.0.4.299.gba9d4
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