1 files changed, 0 insertions, 329 deletions
diff --git a/third_party/git/xdiff/xemit.c b/third_party/git/xdiff/xemit.c
deleted file mode 100644
index 9d7d6c508749..000000000000
--- a/third_party/git/xdiff/xemit.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- *  LibXDiff by Davide Libenzi ( File Differential Library )
- *  Copyright (C) 2003	Davide Libenzi
- *
- *  This library is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU Lesser General Public
- *  License as published by the Free Software Foundation; either
- *  version 2.1 of the License, or (at your option) any later version.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  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, 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) {
-
-	*rec = xdf->recs[ri]->ptr;
-
-	return xdf->recs[ri]->size;
-}
-
-
-static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb) {
-	long size, psize = strlen(pre);
-	char const *rec;
-
-	size = xdl_get_rec(xdf, ri, &rec);
-	if (xdl_emit_diffrec(rec, size, pre, psize, ecb) < 0) {
-
-		return -1;
-	}
-
-	return 0;
-}
-
-
-/*
- * Starting at the passed change atom, find the latest change atom to be included
- * inside the differential hunk according to the specified configuration.
- * Also advance xscr if the first changes must be discarded.
- */
-xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg)
-{
-	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 */
-
-	/* remove ignorable changes that are too far before other changes */
-	for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) {
-		xch = xchp->next;
-
-		if (xch == NULL ||
-		    xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable)
-			*xscr = xch;
-	}
-
-	if (*xscr == NULL)
-		return NULL;
-
-	lxch = *xscr;
-
-	for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) {
-		long distance = xch->i1 - (xchp->i1 + xchp->chg1);
-		if (distance > max_common)
-			break;
-
-		if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) {
-			lxch = xch;
-			ignored = 0;
-		} else if (distance < max_ignorable && xch->ignore) {
-			ignored += xch->chg2;
-		} else if (lxch != xchp &&
-			   xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) {
-			break;
-		} else if (!xch->ignore) {
-			lxch = xch;
-			ignored = 0;
-		} else {
-			ignored += xch->chg2;
-		}
-	}
-
-	return lxch;
-}
-
-
-static long def_ff(const char *rec, long len, char *buf, long sz, void *priv)
-{
-	if (len > 0 &&
-			(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]))
-			len--;
-		memcpy(buf, rec, len);
-		return len;
-	}
-	return -1;
-}
-
-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);
-}
-
-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 {
-	long len;
-	char buf[80];
-};
-
-static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg,
-			  struct func_line *func_line, long start, long limit)
-{
-	long l, size, step = (start > limit) ? -1 : 1;
-	char *buf, dummy[1];
-
-	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) {
-		long len = match_func_rec(&xe->xdf1, xecfg, l, buf, size);
-		if (len >= 0) {
-			if (func_line)
-				func_line->len = len;
-			return l;
-		}
-	}
-	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;
-	xdchange_t *xch, *xche;
-	long funclineprev = -1;
-	struct func_line func_line = { 0 };
-
-	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, 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 = 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;
-				}
-			}
-		}
-
- 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));
-
-		e1 = xche->i1 + xche->chg1 + lctx;
-		e2 = xche->i2 + xche->chg2 + lctx;
-
-		if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) {
-			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 = XDL_MIN(e2 + (fe1 - e1), xe->xdf2.nrec);
-				e1 = fe1;
-			}
-
-			/*
-			 * Overlap with next change?  Then include it
-			 * in the current hunk and start over to find
-			 * its new end.
-			 */
-			if (xche->next) {
-				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 post_context_calculation;
-				}
-			}
-		}
-
-		/*
-		 * Emit current hunk header.
-		 */
-
-		if (xecfg->flags & XDL_EMIT_FUNCNAMES) {
-			get_func_line(xe, xecfg, &func_line,
-				      s1 - 1, funclineprev);
-			funclineprev = s1 - 1;
-		}
-		if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2,
-				      func_line.buf, func_line.len, ecb) < 0)
-			return -1;
-
-		/*
-		 * Emit pre-context.
-		 */
-		for (; s2 < xch->i2; s2++)
-			if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-				return -1;
-
-		for (s1 = xch->i1, s2 = xch->i2;; xch = xch->next) {
-			/*
-			 * Merge previous with current change atom.
-			 */
-			for (; s1 < xch->i1 && s2 < xch->i2; s1++, s2++)
-				if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-					return -1;
-
-			/*
-			 * Removes lines from the first file.
-			 */
-			for (s1 = xch->i1; s1 < xch->i1 + xch->chg1; s1++)
-				if (xdl_emit_record(&xe->xdf1, s1, "-", ecb) < 0)
-					return -1;
-
-			/*
-			 * Adds lines from the second file.
-			 */
-			for (s2 = xch->i2; s2 < xch->i2 + xch->chg2; s2++)
-				if (xdl_emit_record(&xe->xdf2, s2, "+", ecb) < 0)
-					return -1;
-
-			if (xch == xche)
-				break;
-			s1 = xch->i1 + xch->chg1;
-			s2 = xch->i2 + xch->chg2;
-		}
-
-		/*
-		 * Emit post-context.
-		 */
-		for (s2 = xche->i2 + xche->chg2; s2 < e2; s2++)
-			if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0)
-				return -1;
-	}
-
-	return 0;
-}