xdiff: rename rindex -> reference_index

The classic diff adds only the lines that it's going to consider,
during the diff, to an array. A mapping between the compacted
array, and the lines of the file that they reference, are
facilitated by this array.

Signed-off-by: Ezekiel Newren <ezekielnewren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: ezekielnewren

xdiff/xdiffi.c

@@ -24,7 +24,7 @@
 
 static size_t get_hash(xdfile_t *xdf, long index)
 {
-	return xdf->recs[xdf->rindex[index]].minimal_perfect_hash;
+	return xdf->recs[xdf->reference_index[index]].minimal_perfect_hash;
 }
 
 #define XDL_MAX_COST_MIN 256
@@ -278,10 +278,10 @@ int xdl_recs_cmp(xdfile_t *xdf1, long off1, long lim1,
 	 */
 	if (off1 == lim1) {
 		for (; off2 < lim2; off2++)
-			xdf2->changed[xdf2->rindex[off2]] = true;
+			xdf2->changed[xdf2->reference_index[off2]] = true;
 	} else if (off2 == lim2) {
 		for (; off1 < lim1; off1++)
-			xdf1->changed[xdf1->rindex[off1]] = true;
+			xdf1->changed[xdf1->reference_index[off1]] = true;
 	} else {
 		xdpsplit_t spl;
 		spl.i1 = spl.i2 = 0;

xdiff/xprepare.c

@@ -128,7 +128,7 @@ static int xdl_classify_record(unsigned int pass, xdlclassifier_t *cf, xrecord_t
 
 static void xdl_free_ctx(xdfile_t *xdf)
 {
-	xdl_free(xdf->rindex);
+	xdl_free(xdf->reference_index);
 	xdl_free(xdf->changed - 1);
 	xdl_free(xdf->recs);
 }
@@ -141,7 +141,7 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
 	uint8_t const *blk, *cur, *top, *prev;
 	xrecord_t *crec;
 
-	xdf->rindex = NULL;
+	xdf->reference_index = NULL;
 	xdf->changed = NULL;
 	xdf->recs = NULL;
 
@@ -169,7 +169,7 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
 
 	if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) &&
 	    (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF)) {
-		if (!XDL_ALLOC_ARRAY(xdf->rindex, xdf->nrec + 1))
+		if (!XDL_ALLOC_ARRAY(xdf->reference_index, xdf->nrec + 1))
 			goto abort;
 	}
 
@@ -312,7 +312,7 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd
 	     i <= xdf1->dend; i++, recs++) {
 		if (action1[i] == KEEP ||
 		    (action1[i] == INVESTIGATE && !xdl_clean_mmatch(action1, i, xdf1->dstart, xdf1->dend))) {
-			xdf1->rindex[xdf1->nreff++] = i;
+			xdf1->reference_index[xdf1->nreff++] = i;
 			/* changed[i] remains false, i.e. keep */
 		} else
 			xdf1->changed[i] = true;
@@ -324,7 +324,7 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd
 	     i <= xdf2->dend; i++, recs++) {
 		if (action2[i] == KEEP ||
 		    (action2[i] == INVESTIGATE && !xdl_clean_mmatch(action2, i, xdf2->dstart, xdf2->dend))) {
-			xdf2->rindex[xdf2->nreff++] = i;
+			xdf2->reference_index[xdf2->nreff++] = i;
 			/* changed[i] remains false, i.e. keep */
 		} else
 			xdf2->changed[i] = true;

xdiff/xtypes.h

@@ -49,7 +49,7 @@ typedef struct s_xdfile {
 	xrecord_t *recs;
 	size_t nrec;
 	bool *changed;
-	size_t *rindex;
+	size_t *reference_index;
 	size_t nreff;
 	ptrdiff_t dstart, dend;
 } xdfile_t;