* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/>.
*
* Davide Libenzi <davidel@xmailserver.org>
*
#include "xinclude.h"
-
-
-
-static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec);
-static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb);
-
-
-
-
static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec) {
*rec = xdf->recs[ri]->ptr;
static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb) {
- long size, psize = (long)strlen(pre);
+ long size, psize = strlen(pre);
char const *rec;
size = xdl_get_rec(xdf, ri, &rec);
} else if (distance < max_ignorable && xch->ignore) {
ignored += xch->chg2;
} else if (lxch != xchp &&
- xch->i1 + ignored - (lxch->i1 + lxch->chg1) > (unsigned long)max_common) {
+ xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) {
break;
} else if (!xch->ignore) {
lxch = xch;
static long def_ff(const char *rec, long len, char *buf, long sz, void *priv)
{
- (void)priv;
-
if (len > 0 &&
(isalpha((unsigned char)*rec) || /* identifier? */
- *rec == '_' || /* also identifier? */
+ *rec == '_' || /* also identifier? */
*rec == '$')) { /* identifiers from VMS and other esoterico */
if (len > sz)
len = sz;
return -1;
}
-static int xdl_emit_common(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
- xdemitconf_t const *xecfg) {
- xdfile_t *xdf = &xe->xdf2;
- const char *rchg = xdf->rchg;
- long ix;
-
- (void)xscr;
- (void)xecfg;
+static long match_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri,
+ char *buf, long sz)
+{
+ const char *rec;
+ long len = xdl_get_rec(xdf, ri, &rec);
+ if (!xecfg->find_func)
+ return def_ff(rec, len, buf, sz, xecfg->find_func_priv);
+ return xecfg->find_func(rec, len, buf, sz, xecfg->find_func_priv);
+}
- for (ix = 0; ix < xdf->nrec; ix++) {
- if (rchg[ix])
- continue;
- if (xdl_emit_record(xdf, ix, "", ecb))
- return -1;
- }
- return 0;
+static int is_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri)
+{
+ char dummy[1];
+ return match_func_rec(xdf, xecfg, ri, dummy, sizeof(dummy)) >= 0;
}
struct func_line {
static long get_func_line(xdfenv_t *xe, 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;
long l, size, step = (start > limit) ? -1 : 1;
char *buf, dummy[1];
size = func_line ? sizeof(func_line->buf) : sizeof(dummy);
for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) {
- const char *rec;
- long reclen = xdl_get_rec(&xe->xdf1, l, &rec);
- long len = ff(rec, reclen, buf, size, xecfg->find_func_priv);
+ long len = match_func_rec(&xe->xdf1, xecfg, l, buf, size);
if (len >= 0) {
if (func_line)
func_line->len = len;
return -1;
}
+static int is_empty_rec(xdfile_t *xdf, long ri)
+{
+ const char *rec;
+ long len = xdl_get_rec(xdf, ri, &rec);
+
+ while (len > 0 && XDL_ISSPACE(*rec)) {
+ rec++;
+ len--;
+ }
+ return !len;
+}
+
int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
xdemitconf_t const *xecfg) {
long s1, s2, e1, e2, lctx;
long funclineprev = -1;
struct func_line func_line = { 0 };
- if (xecfg->flags & XDL_EMIT_COMMON)
- return xdl_emit_common(xe, xscr, ecb, xecfg);
-
for (xch = xscr; xch; xch = xche->next) {
+ xdchange_t *xchp = xch;
xche = xdl_get_hunk(&xch, xecfg);
if (!xch)
break;
+pre_context_calculation:
s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0);
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, i1 = xch->i1;
+
+ /* Appended chunk? */
+ if (i1 >= xe->xdf1.nrec) {
+ long i2 = xch->i2;
+
+ /*
+ * We don't need additional context if
+ * a whole function was added.
+ */
+ while (i2 < xe->xdf2.nrec) {
+ if (is_func_rec(&xe->xdf2, xecfg, i2))
+ goto post_context_calculation;
+ i2++;
+ }
+
+ /*
+ * Otherwise get more context from the
+ * pre-image.
+ */
+ i1 = xe->xdf1.nrec - 1;
+ }
+
+ fs1 = get_func_line(xe, xecfg, NULL, i1, -1);
+ while (fs1 > 0 && !is_empty_rec(&xe->xdf1, fs1 - 1) &&
+ !is_func_rec(&xe->xdf1, xecfg, fs1 - 1))
+ fs1--;
if (fs1 < 0)
fs1 = 0;
if (fs1 < s1) {
- s2 -= s1 - fs1;
+ s2 = XDL_MAX(s2 - (s1 - fs1), 0);
s1 = fs1;
+
+ /*
+ * Did we extend context upwards into an
+ * ignored change?
+ */
+ while (xchp != xch &&
+ xchp->i1 + xchp->chg1 <= s1 &&
+ xchp->i2 + xchp->chg2 <= s2)
+ xchp = xchp->next;
+
+ /* If so, show it after all. */
+ if (xchp != xch) {
+ xch = xchp;
+ goto pre_context_calculation;
+ }
}
}
- again:
+ post_context_calculation:
lctx = xecfg->ctxlen;
lctx = XDL_MIN(lctx, xe->xdf1.nrec - (xche->i1 + xche->chg1));
lctx = XDL_MIN(lctx, xe->xdf2.nrec - (xche->i2 + xche->chg2));
long fe1 = get_func_line(xe, xecfg, NULL,
xche->i1 + xche->chg1,
xe->xdf1.nrec);
+ while (fe1 > 0 && is_empty_rec(&xe->xdf1, fe1 - 1))
+ fe1--;
if (fe1 < 0)
fe1 = xe->xdf1.nrec;
if (fe1 > e1) {
- e2 += fe1 - e1;
+ e2 = XDL_MIN(e2 + (fe1 - e1), xe->xdf2.nrec);
e1 = fe1;
}
* its new end.
*/
if (xche->next) {
- long l = xche->next->i1;
- if (l <= e1 ||
+ long l = XDL_MIN(xche->next->i1,
+ xe->xdf1.nrec - 1);
+ if (l - xecfg->ctxlen <= e1 ||
get_func_line(xe, xecfg, NULL, l, e1) < 0) {
xche = xche->next;
- goto again;
+ goto post_context_calculation;
}
}
}
s1 - 1, funclineprev);
funclineprev = s1 - 1;
}
- if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
+ if (!(xecfg->flags & XDL_EMIT_NO_HUNK_HDR) &&
+ xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
func_line.buf, func_line.len, ecb) < 0)
return -1;
projects / libgit2.git / blobdiff