patch 8.2.3390: included xdiff code is outdated
Problem: Included xdiff code is outdated.
Solution: Sync with xdiff in git 2.33. (Christian Brabandt, closes #8431)
diff --git a/src/xdiff/xemit.c b/src/xdiff/xemit.c
index f1a4513..a0078f9 100644
--- a/src/xdiff/xemit.c
+++ b/src/xdiff/xemit.c
@@ -31,7 +31,7 @@
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);
@@ -54,9 +54,9 @@
xdchange_t *xch, *xchp, *lxch;
long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
long max_ignorable = xecfg->ctxlen;
- unsigned long ignored = 0; // number of ignored blank lines
+ unsigned long ignored = 0; /* number of ignored blank lines */
- // remove ignorable changes that are too far before other changes
+ /* remove ignorable changes that are too far before other changes */
for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) {
xch = xchp->next;
@@ -99,9 +99,9 @@
static long def_ff(const char *rec, long len, char *buf, long sz, void *priv UNUSED)
{
if (len > 0 &&
- (isalpha((unsigned char)*rec) || // identifier?
- *rec == '_' || // also identifier?
- *rec == '$')) { // identifiers from VMS and other esoterico
+ (isalpha((unsigned char)*rec) || /* identifier? */
+ *rec == '_' || /* also identifier? */
+ *rec == '$')) { /* identifiers from VMS and other esoterico */
if (len > sz)
len = sz;
while (0 < len && isspace((unsigned char)rec[len - 1]))
@@ -197,7 +197,7 @@
if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
long fs1, i1 = xch->i1;
- // Appended chunk?
+ /* Appended chunk? */
if (i1 >= xe->xdf1.nrec) {
long i2 = xch->i2;
@@ -225,8 +225,23 @@
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;
+ }
}
}
@@ -249,7 +264,7 @@
if (fe1 < 0)
fe1 = xe->xdf1.nrec;
if (fe1 > e1) {
- e2 += fe1 - e1;
+ e2 = XDL_MIN(e2 + (fe1 - e1), xe->xdf2.nrec);
e1 = fe1;
}
@@ -281,7 +296,8 @@
funclineprev = s1 - 1;
}
#endif
- 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;