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-rw-r--r--src/xdiff/xemit.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/src/xdiff/xemit.c b/src/xdiff/xemit.c
deleted file mode 100644
index 0ffa6553a..000000000
--- a/src/xdiff/xemit.c
+++ /dev/null
@@ -1,314 +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 = (long)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) > (unsigned long)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)
-{
- (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) {
- xche = xdl_get_hunk(&xch, xecfg);
- if (!xch)
- break;
-
- 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 -= s1 - fs1;
- s1 = fs1;
- }
- }
-
- 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 += fe1 - e1;
- 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;
-}
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