In a later patch, I want to propose an option to detect&color
moved lines in a diff, which cannot be done in a one-pass over
the diff. Instead we need to go over the whole diff twice,
because we cannot detect the first line of the two corresponding
lines (+ and -) that got moved.
So to prepare the diff machinery for two pass algorithms
(i.e. buffer it all up and then operate on the result),
move all emissions to places, such that the only emitting
function is emit_line_0.
This covers the remaining parts of fn_out_consume.
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
diff.c | 26 ++++++++++++++++++--------
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/diff.c b/diff.c
index 5d57130..b4f4b75 100644
--- a/diff.c
+++ b/diff.c
@@ -493,6 +493,19 @@ static void emit_line(struct diff_options *o, const char *set, const char *reset
emit_line_0(o, set, reset, line[0], line+1, len-1);
}
+static void emit_line_fmt(struct diff_options *o,
+ const char *set, const char *reset,
+ const char *fmt, ...)
+{
+ struct strbuf sb = STRBUF_INIT;
+ va_list ap;
+ va_start(ap, fmt);
+ strbuf_vaddf(&sb, fmt, ap);
+ va_end(ap);
+
+ emit_line(o, set, reset, sb.buf, sb.len);
+}
+
static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len)
{
if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) &&
@@ -1217,7 +1230,6 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT);
const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
struct diff_options *o = ecbdata->opt;
- const char *line_prefix = diff_line_prefix(o);
o->found_changes = 1;
@@ -1229,14 +1241,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
if (ecbdata->label_path[0]) {
const char *name_a_tab, *name_b_tab;
-
name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : "";
name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : "";
-
- fprintf(o->file, "%s%s--- %s%s%s\n",
- line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab);
- fprintf(o->file, "%s%s+++ %s%s%s\n",
- line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab);
+ emit_line_fmt(o, meta, reset, "--- %s%s\n",
+ ecbdata->label_path[0], name_a_tab);
+ emit_line_fmt(o, meta, reset, "+++ %s%s\n",
+ ecbdata->label_path[1], name_b_tab);
ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
}
@@ -1277,7 +1287,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
diff_words_flush(ecbdata);
if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) {
emit_line(o, context, reset, line, len);
- fputs("~\n", o->file);
+ emit_line(o, 0, 0, "~\n", 2);
} else {
/*
* Skip the prefix character, if any. With
--
2.10.0.21.g1da280f.dirty