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diff.c: the builtin_diff() deals with only two-file comparison

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The combined diff is implemented in combine_diff() and fn_out_consume()
codepath never has to deal with anything but two-file comparision.

Drop nparents from the emit_callback structure and simplify the code.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2009-09-03 23:59:25 -07:00
parent 94ea026b35
commit b8d9c1a66b
1 changed files with 9 additions and 23 deletions
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28
diff.c
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@ -489,7 +489,7 @@ typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
struct emit_callback {
struct xdiff_emit_state xm;
int nparents, color_diff;
int color_diff;
unsigned ws_rule;
sane_truncate_fn truncate;
const char **label_path;
@ -549,9 +549,8 @@ static void emit_add_line(const char *reset, struct emit_callback *ecbdata, cons
emit_line(ecbdata->file, set, reset, line, len);
else {
/* Emit just the prefix, then the rest. */
emit_line(ecbdata->file, set, reset, line, ecbdata->nparents);
ws_check_emit(line + ecbdata->nparents,
len - ecbdata->nparents, ecbdata->ws_rule,
emit_line(ecbdata->file, set, reset, line, 1);
ws_check_emit(line + 1, len - 1, ecbdata->ws_rule,
ecbdata->file, set, reset, ws);
}
}
@ -576,7 +575,6 @@ static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, u
static void fn_out_consume(void *priv, char *line, unsigned long len)
{
int i;
int color;
struct emit_callback *ecbdata = priv;
const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
@ -598,13 +596,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
}
/* This is not really necessary for now because
* this codepath only deals with two-way diffs.
*/
for (i = 0; i < len && line[i] == '@'; i++)
;
if (2 <= i && i < len && line[i] == ' ') {
ecbdata->nparents = i - 1;
if (line[0] == '@') {
len = sane_truncate_line(ecbdata, line, len);
emit_line(ecbdata->file,
diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO),
@ -614,15 +606,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
return;
}
if (len < ecbdata->nparents) {
if (len < 1) {
emit_line(ecbdata->file, reset, reset, line, len);
return;
}
color = DIFF_PLAIN;
if (ecbdata->diff_words && ecbdata->nparents != 1)
/* fall back to normal diff */
free_diff_words_data(ecbdata);
if (ecbdata->diff_words) {
if (line[0] == '-') {
diff_words_append(line, len,
@ -641,13 +630,10 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
emit_line(ecbdata->file, plain, reset, line, len);
return;
}
for (i = 0; i < ecbdata->nparents && len; i++) {
if (line[i] == '-')
if (line[0] == '-')
color = DIFF_FILE_OLD;
else if (line[i] == '+')
else if (line[0] == '+')
color = DIFF_FILE_NEW;
}
if (color != DIFF_FILE_NEW) {
emit_line(ecbdata->file,
diff_get_color(ecbdata->color_diff, color),