From: "Bhushan G. Lodha & David A. Dalrymple" <dad-...@mit.edu>
For filtering commits by function name, it's useful to identify the
function name in cases such as adding a new function to a file (where
the default functionality will not emit a function name in the hunk
header, because it isn't part of the context).
This adds a flag asking xdiff to be more aggressive in finding function
names to emit, and turns the flag on when the --function-name option is
in use.
Signed-off-by: David Dalrymple (on zayin) <davi...@alum.mit.edu>
---
diff.c | 2 ++
diffcore-pickaxe.c | 2 +-
xdiff/xdiff.h | 1 +
xdiff/xemit.c | 39 +++++++++++++++++++++++----------------
4 files changed, 27 insertions(+), 17 deletions(-)
diff --git a/diff.c b/diff.c
index 2f6dbc1..914b4a2 100644
--- a/diff.c
+++ b/diff.c
@@ -2380,6 +2380,8 @@ static void builtin_diff(const char *name_a,
xecfg.ctxlen = o->context;
xecfg.interhunkctxlen = o->interhunkcontext;
xecfg.flags = XDL_EMIT_FUNCNAMES;
+ if (o->funcname)
+ xecfg.flags |= XDL_EMIT_MOREFUNCNAMES;
if (DIFF_OPT_TST(o, FUNCCONTEXT))
xecfg.flags |= XDL_EMIT_FUNCCONTEXT;
if (pe)
diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index 259a8fa..ab31c18 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -164,7 +164,7 @@ static int diff_funcname_filter(mmfile_t *one, mmfile_t
*two,
xecfg.interhunkctxlen = o->interhunkcontext;
if (!(one && two))
xecfg.flags = XDL_EMIT_FUNCCONTEXT;
- xecfg.flags |= XDL_EMIT_FUNCNAMES;
+ xecfg.flags |= XDL_EMIT_FUNCNAMES | XDL_EMIT_MOREFUNCNAMES;
xdi_diff_outf(one, two, match_funcname, &ecbdata, &xpp, &xecfg);
return ecbdata.hit;
}
diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index c033991..469bded 100644
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -44,6 +44,7 @@
#define XDL_EMIT_FUNCNAMES (1 << 0)
#define XDL_EMIT_COMMON (1 << 1)
#define XDL_EMIT_FUNCCONTEXT (1 << 2)
+#define XDL_EMIT_MOREFUNCNAMES (1 << 3)
#define XDL_MMB_READONLY (1 << 0)
diff --git a/xdiff/xemit.c b/xdiff/xemit.c
index 4266ada..0ddb094 100644
--- a/xdiff/xemit.c
+++ b/xdiff/xemit.c
@@ -23,6 +23,10 @@
#include "xinclude.h"
+struct func_line {
+ long len;
+ char buf[80];
+};
static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec);
@@ -135,12 +139,7 @@ static int xdl_emit_common(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
return 0;
}
-struct func_line {
- long len;
- char buf[80];
-};
-
-static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg,
+static long get_func_line(xdfile_t *xdf, xdemitconf_t const *xecfg,
struct func_line *func_line, long start, long limit)
{
find_func_t ff = xecfg->find_func ? xecfg->find_func : def_ff;
@@ -150,9 +149,9 @@ static long get_func_line(xdfenv_t *xe, xdemitconf_t const
*xecfg,
buf = func_line ? func_line->buf : dummy;
size = func_line ? sizeof(func_line->buf) : sizeof(dummy);
- for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) {
+ for (l = start; l != limit && 0 <= l && l < xdf->nrec; l += step) {
const char *rec;
- long reclen = xdl_get_rec(&xe->xdf1, l, &rec);
+ long reclen = xdl_get_rec(xdf, l, &rec);
long len = ff(rec, reclen, buf, size, xecfg->find_func_priv);
if (len >= 0) {
if (func_line)
@@ -167,7 +166,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
xdemitconf_t const *xecfg) {
long s1, s2, e1, e2, lctx;
xdchange_t *xch, *xche;
- long funclineprev = -1;
+ long funclineprev1 = -1, funclineprev2 = -1;
struct func_line func_line = { 0 };
if (xecfg->flags & XDL_EMIT_COMMON)
@@ -182,7 +181,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0);
if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
- long fs1 = get_func_line(xe, xecfg, NULL, xch->i1, -1);
+ long fs1 = get_func_line(&xe->xdf1, xecfg, NULL,
xch->i1, -1);
if (fs1 < 0)
fs1 = 0;
if (fs1 < s1) {
@@ -200,7 +199,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
e2 = xche->i2 + xche->chg2 + lctx;
if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
- long fe1 = get_func_line(xe, xecfg, NULL,
+ long fe1 = get_func_line(&xe->xdf1, xecfg, NULL,
xche->i1 + xche->chg1,
xe->xdf1.nrec);
if (fe1 < 0)
@@ -218,7 +217,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
if (xche->next) {
long l = xche->next->i1;
if (l <= e1 ||
- get_func_line(xe, xecfg, NULL, l, e1) < 0) {
+ get_func_line(&xe->xdf1, xecfg, NULL, l,
e1) < 0) {
xche = xche->next;
goto again;
}
@@ -229,10 +228,18 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr,
xdemitcb_t *ecb,
* Emit current hunk header.
*/
- if (xecfg->flags & XDL_EMIT_FUNCNAMES) {
- get_func_line(xe, xecfg, &func_line,
- s1 - 1, funclineprev);
- funclineprev = s1 - 1;
+ if (xecfg->flags & XDL_EMIT_MOREFUNCNAMES) {
+ long fl_in_xch1 = get_func_line(&xe->xdf1, xecfg,
+ &func_line, xch->i1, xch->i1+xch->chg1);
+ if (fl_in_xch1 < 0) {
+ get_func_line(&xe->xdf2, xecfg, &func_line,
+ xch->i2, funclineprev2);
+ funclineprev2 = xch->i2;
+ }
+ } else if (xecfg->flags & XDL_EMIT_FUNCNAMES) {
+ get_func_line(&xe->xdf1, xecfg, &func_line,
+ s1 - 1, funclineprev1);
+ funclineprev1 = s1 - 1;
}
if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
func_line.buf, func_line.len, ecb) < 0)
--
1.7.12.4 (Apple Git-37)
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