#include "diff.h"
#include "diffcore.h"
#include "quote.h"
+#include "xdiff/xdiff.h"
static int uninteresting(struct diff_filepair *p)
{
return blob;
}
-#define TMPPATHLEN 50
-#define MAXLINELEN 10240
-
-static void write_to_temp_file(char *tmpfile, void *blob, unsigned long size)
-{
- int fd = git_mkstemp(tmpfile, TMPPATHLEN, ".diff_XXXXXX");
- if (fd < 0)
- die("unable to create temp-file");
- if (write(fd, blob, size) != size)
- die("unable to write temp-file");
- close(fd);
-}
-
-static void write_temp_blob(char *tmpfile, const unsigned char *sha1)
-{
- unsigned long size;
- void *blob;
- blob = grab_blob(sha1, &size);
- write_to_temp_file(tmpfile, blob, size);
- free(blob);
-}
-
static int parse_num(char **cp_p, unsigned int *num_p)
{
char *cp = *cp_p;
return -!!memcmp(cp, " @@", 3);
}
-static void append_lost(struct sline *sline, int n, const char *line)
+static void append_lost(struct sline *sline, int n, const char *line, int len)
{
struct lline *lline;
- int len = strlen(line);
unsigned long this_mask = (1UL<<n);
if (line[len-1] == '\n')
len--;
sline->lost_tail = &lline->next;
}
-static void combine_diff(const unsigned char *parent, const char *ourtmp,
+struct combine_diff_state {
+ char *remainder;
+ unsigned long remainder_size;
+ unsigned int lno, ob, on, nb, nn;
+ unsigned long nmask;
+ int num_parent;
+ int n;
+ struct sline *sline;
+ struct sline *lost_bucket;
+};
+
+static void consume_line(struct combine_diff_state *state,
+ char *line,
+ unsigned long len)
+{
+ if (5 < len && !memcmp("@@ -", line, 4)) {
+ if (parse_hunk_header(line, len,
+ &state->ob, &state->on,
+ &state->nb, &state->nn))
+ return;
+ state->lno = state->nb;
+ if (!state->nb)
+ /* @@ -1,2 +0,0 @@ to remove the
+ * first two lines...
+ */
+ state->nb = 1;
+ if (state->nn == 0)
+ /* @@ -X,Y +N,0 @@ removed Y lines
+ * that would have come *after* line N
+ * in the result. Our lost buckets hang
+ * to the line after the removed lines,
+ */
+ state->lost_bucket = &state->sline[state->nb];
+ else
+ state->lost_bucket = &state->sline[state->nb-1];
+ if (!state->sline[state->nb-1].p_lno)
+ state->sline[state->nb-1].p_lno =
+ xcalloc(state->num_parent,
+ sizeof(unsigned long));
+ state->sline[state->nb-1].p_lno[state->n] = state->ob;
+ return;
+ }
+ if (!state->lost_bucket)
+ return; /* not in any hunk yet */
+ switch (line[0]) {
+ case '-':
+ append_lost(state->lost_bucket, state->n, line+1, len-1);
+ break;
+ case '+':
+ state->sline[state->lno-1].flag |= state->nmask;
+ state->lno++;
+ break;
+ }
+}
+
+static int combine_diff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
+{
+ struct combine_diff_state *priv = priv_;
+ int i;
+ for (i = 0; i < nbuf; i++) {
+ if (mb[i].ptr[mb[i].size-1] != '\n') {
+ /* Incomplete line */
+ priv->remainder = realloc(priv->remainder,
+ priv->remainder_size +
+ mb[i].size);
+ memcpy(priv->remainder + priv->remainder_size,
+ mb[i].ptr, mb[i].size);
+ priv->remainder_size += mb[i].size;
+ continue;
+ }
+
+ /* we have a complete line */
+ if (!priv->remainder) {
+ consume_line(priv, mb[i].ptr, mb[i].size);
+ continue;
+ }
+ priv->remainder = realloc(priv->remainder,
+ priv->remainder_size +
+ mb[i].size);
+ memcpy(priv->remainder + priv->remainder_size,
+ mb[i].ptr, mb[i].size);
+ consume_line(priv, priv->remainder,
+ priv->remainder_size + mb[i].size);
+ free(priv->remainder);
+ priv->remainder = NULL;
+ priv->remainder_size = 0;
+ }
+ return 0;
+}
+
+static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
struct sline *sline, int cnt, int n, int num_parent)
{
- FILE *in;
- char parent_tmp[TMPPATHLEN];
- char cmd[TMPPATHLEN * 2 + 1024];
- char line[MAXLINELEN];
- unsigned int lno, ob, on, nb, nn, p_lno;
+ unsigned int p_lno, lno;
unsigned long nmask = (1UL << n);
- struct sline *lost_bucket = NULL;
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ mmfile_t parent_file;
+ xdemitcb_t ecb;
+ struct combine_diff_state state;
+ unsigned long sz;
if (!cnt)
return; /* result deleted */
- write_temp_blob(parent_tmp, parent);
- sprintf(cmd, "diff --unified=0 -La/x -Lb/x '%s' '%s'",
- parent_tmp, ourtmp);
- in = popen(cmd, "r");
- if (!in)
- die("cannot spawn %s", cmd);
-
- lno = 1;
- while (fgets(line, sizeof(line), in) != NULL) {
- int len = strlen(line);
- if (5 < len && !memcmp("@@ -", line, 4)) {
- if (parse_hunk_header(line, len,
- &ob, &on, &nb, &nn))
- break;
- lno = nb;
- if (!nb)
- /* @@ -1,2 +0,0 @@ to remove the
- * first two lines...
- */
- nb = 1;
- if (nn == 0)
- /* @@ -X,Y +N,0 @@ removed Y lines
- * that would have come *after* line N
- * in the result. Our lost buckets hang
- * to the line after the removed lines,
- */
- lost_bucket = &sline[nb];
- else
- lost_bucket = &sline[nb-1];
- if (!sline[nb-1].p_lno)
- sline[nb-1].p_lno =
- xcalloc(num_parent,
- sizeof(unsigned long));
- sline[nb-1].p_lno[n] = ob;
- continue;
- }
- if (!lost_bucket)
- continue; /* not in any hunk yet */
- switch (line[0]) {
- case '-':
- append_lost(lost_bucket, n, line+1);
- break;
- case '+':
- sline[lno-1].flag |= nmask;
- lno++;
- break;
- }
- }
- fclose(in);
- unlink(parent_tmp);
+ parent_file.ptr = grab_blob(parent, &sz);
+ parent_file.size = sz;
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 0;
+ xecfg.flags = 0;
+ ecb.outf = combine_diff_outf;
+ ecb.priv = &state;
+ memset(&state, 0, sizeof(state));
+ state.nmask = nmask;
+ state.sline = sline;
+ state.lno = 1;
+ state.num_parent = num_parent;
+ state.n = n;
+
+ xdl_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
+ if (state.remainder && state.remainder_size)
+ consume_line(&state, state.remainder, state.remainder_size);
+ free(state.remainder);
+ free(parent_file.ptr);
/* Assign line numbers for this parent.
*
int dense, const char *header,
struct diff_options *opt)
{
- unsigned long size, cnt, lno;
+ unsigned long result_size, cnt, lno;
char *result, *cp, *ep;
struct sline *sline; /* survived lines */
int mode_differs = 0;
int i, show_hunks, shown_header = 0;
- char ourtmp_buf[TMPPATHLEN];
- char *ourtmp = ourtmp_buf;
int working_tree_file = !memcmp(elem->sha1, null_sha1, 20);
int abbrev = opt->full_index ? 40 : DEFAULT_ABBREV;
+ mmfile_t result_file;
/* Read the result of merge first */
- if (!working_tree_file) {
- result = grab_blob(elem->sha1, &size);
- write_to_temp_file(ourtmp, result, size);
- }
+ if (!working_tree_file)
+ result = grab_blob(elem->sha1, &result_size);
else {
/* Used by diff-tree to read from the working tree */
struct stat st;
int fd;
- ourtmp = elem->path;
- if (0 <= (fd = open(ourtmp, O_RDONLY)) &&
+ if (0 <= (fd = open(elem->path, O_RDONLY)) &&
!fstat(fd, &st)) {
int len = st.st_size;
int cnt = 0;
elem->mode = canon_mode(st.st_mode);
- size = len;
+ result_size = len;
result = xmalloc(len + 1);
while (cnt < len) {
int done = xread(fd, result+cnt, len-cnt);
if (done == 0)
break;
if (done < 0)
- die("read error '%s'", ourtmp);
+ die("read error '%s'", elem->path);
cnt += done;
}
result[len] = 0;
}
else {
/* deleted file */
- size = 0;
+ result_size = 0;
elem->mode = 0;
result = xmalloc(1);
result[0] = 0;
- ourtmp = "/dev/null";
}
if (0 <= fd)
close(fd);
}
- for (cnt = 0, cp = result; cp - result < size; cp++) {
+ for (cnt = 0, cp = result; cp - result < result_size; cp++) {
if (*cp == '\n')
cnt++;
}
- if (size && result[size-1] != '\n')
+ if (result_size && result[result_size-1] != '\n')
cnt++; /* incomplete line */
sline = xcalloc(cnt+1, sizeof(*sline));
sline[lno].lost_tail = &sline[lno].lost_head;
sline[lno].flag = 0;
}
- for (lno = 0, cp = result; cp - result < size; cp++) {
+ for (lno = 0, cp = result; cp - result < result_size; cp++) {
if (*cp == '\n') {
sline[lno].len = cp - sline[lno].bol;
lno++;
sline[lno].bol = cp + 1;
}
}
- if (size && result[size-1] != '\n')
- sline[cnt-1].len = size - (sline[cnt-1].bol - result);
+ if (result_size && result[result_size-1] != '\n')
+ sline[cnt-1].len = result_size - (sline[cnt-1].bol - result);
+
+ result_file.ptr = result;
+ result_file.size = result_size;
sline[0].p_lno = xcalloc((cnt+1) * num_parent, sizeof(unsigned long));
for (lno = 0; lno < cnt; lno++)
}
}
if (i <= j)
- combine_diff(elem->parent[i].sha1, ourtmp, sline,
+ combine_diff(elem->parent[i].sha1, &result_file, sline,
cnt, i, num_parent);
if (elem->parent[i].mode != elem->mode)
mode_differs = 1;
}
dump_sline(sline, cnt, num_parent);
}
- if (ourtmp == ourtmp_buf)
- unlink(ourtmp);
free(result);
for (i = 0; i < cnt; i++) {
git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
done <"$clone_tmp/refs"
rm -fr "$clone_tmp"
- http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD"
+ http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
+ rm -f "$GIT_DIR/REMOTE_HEAD"
}
# Read git-fetch-pack -k output and store the remote branches.
if test -f "$GIT_DIR/CLONE_HEAD"
then
- # Figure out where the remote HEAD points at.
+ # Read git-fetch-pack -k output and store the remote branches.
perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
fi
if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
then
- head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
# Figure out which remote branch HEAD points at.
case "$use_separate_remote" in
'') remote_top=refs/heads ;;
*) remote_top="refs/remotes/$origin" ;;
esac
- # What to use to track the remote primary branch
- if test -n "$use_separate_remote"
- then
- origin_tracking="remotes/$origin/master"
- else
- origin_tracking="heads/$origin"
- fi
+ head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
+ case "$head_sha1" in
+ 'ref: refs/'*)
+ # Uh-oh, the remote told us (http transport done against
+ # new style repository with a symref HEAD).
+ # Ideally we should skip the guesswork but for now
+ # opt for minimum change.
+ head_sha1=`expr "$head_sha1" : 'ref: refs/heads/\(.*\)'`
+ head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
+ ;;
+ esac
- # The name under $remote_top the remote HEAD seems to point at
+ # The name under $remote_top the remote HEAD seems to point at.
head_points_at=$(
(
echo "master"
)
)
- # Write out remotes/$origin file.
+ # Write out remotes/$origin file, and update our "$head_points_at".
case "$head_points_at" in
?*)
mkdir -p "$GIT_DIR/remotes" &&
- echo >"$GIT_DIR/remotes/$origin" \
- "URL: $repo
-Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
+ git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
case "$use_separate_remote" in
- t) git-update-ref HEAD "$head_sha1" ;;
- *) git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) ;;
+ t) origin_track="$remote_top/$head_points_at"
+ git-update-ref HEAD "$head_sha1" ;;
+ *) origin_track="$remote_top/$origin"
+ git-update-ref "refs/heads/$origin" "$head_sha1" ;;
esac &&
+ echo >"$GIT_DIR/remotes/$origin" \
+ "URL: $repo
+Pull: refs/heads/$head_points_at:$origin_track" &&
(cd "$GIT_DIR/$remote_top" && find . -type f -print) |
while read dotslref
do
name=`expr "$dotslref" : './\(.*\)'` &&
- test "$head_points_at" = "$name" ||
- test "$origin" = "$name" ||
+ test "$use_separate_remote" = '' && {
+ test "$head_points_at" = "$name" ||
+ test "$origin" = "$name"
+ } ||
echo "Pull: refs/heads/${name}:$remote_top/${name}"
done >>"$GIT_DIR/remotes/$origin" &&
case "$use_separate_remote" in
#define XDL_KPDIS_RUN 4
+#define XDL_MAX_EQLIMIT 1024
static int xdl_clean_mmatch(char const *dis, long i, long s, long e) {
- long r, rdis, rpdis;
-
- for (r = 1, rdis = 0, rpdis = 1; (i - r) >= s; r++) {
+ long r, rdis0, rpdis0, rdis1, rpdis1;
+
+ /*
+ * Scans the lines before 'i' to find a run of lines that either
+ * have no match (dis[j] == 0) or have multiple matches (dis[j] > 1).
+ * Note that we always call this function with dis[i] > 1, so the
+ * current line (i) is already a multimatch line.
+ */
+ for (r = 1, rdis0 = 0, rpdis0 = 1; (i - r) >= s; r++) {
if (!dis[i - r])
- rdis++;
+ rdis0++;
else if (dis[i - r] == 2)
- rpdis++;
+ rpdis0++;
else
break;
}
- for (r = 1; (i + r) <= e; r++) {
+ /*
+ * If the run before the line 'i' found only multimatch lines, we
+ * return 0 and hence we don't make the current line (i) discarded.
+ * We want to discard multimatch lines only when they appear in the
+ * middle of runs with nomatch lines (dis[j] == 0).
+ */
+ if (rdis0 == 0)
+ return 0;
+ for (r = 1, rdis1 = 0, rpdis1 = 1; (i + r) <= e; r++) {
if (!dis[i + r])
- rdis++;
+ rdis1++;
else if (dis[i + r] == 2)
- rpdis++;
+ rpdis1++;
else
break;
}
-
- return rpdis * XDL_KPDIS_RUN < (rpdis + rdis);
+ /*
+ * If the run after the line 'i' found only multimatch lines, we
+ * return 0 and hence we don't make the current line (i) discarded.
+ */
+ if (rdis1 == 0)
+ return 0;
+ rdis1 += rdis0;
+ rpdis1 += rpdis0;
+
+ return rpdis1 * XDL_KPDIS_RUN < (rpdis1 + rdis1);
}
* might be potentially discarded if they happear in a run of discardable.
*/
static int xdl_cleanup_records(xdfile_t *xdf1, xdfile_t *xdf2) {
- long i, rhi, nreff;
+ long i, nm, rhi, nreff, mlim;
unsigned long hav;
xrecord_t **recs;
xrecord_t *rec;
char *dis, *dis1, *dis2;
- if (!(dis = (char *) xdl_malloc((xdf1->nrec + xdf2->nrec + 2) * sizeof(char)))) {
+ if (!(dis = (char *) xdl_malloc(xdf1->nrec + xdf2->nrec + 2))) {
return -1;
}
- memset(dis, 0, (xdf1->nrec + xdf2->nrec + 2) * sizeof(char));
+ memset(dis, 0, xdf1->nrec + xdf2->nrec + 2);
dis1 = dis;
dis2 = dis1 + xdf1->nrec + 1;
+ if ((mlim = xdl_bogosqrt(xdf1->nrec)) > XDL_MAX_EQLIMIT)
+ mlim = XDL_MAX_EQLIMIT;
for (i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; i <= xdf1->dend; i++, recs++) {
hav = (*recs)->ha;
rhi = (long) XDL_HASHLONG(hav, xdf2->hbits);
- for (rec = xdf2->rhash[rhi]; rec; rec = rec->next)
- if (rec->ha == hav && ++dis1[i] == 2)
+ for (nm = 0, rec = xdf2->rhash[rhi]; rec; rec = rec->next)
+ if (rec->ha == hav && ++nm == mlim)
break;
+ dis1[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
}
+ if ((mlim = xdl_bogosqrt(xdf2->nrec)) > XDL_MAX_EQLIMIT)
+ mlim = XDL_MAX_EQLIMIT;
for (i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; i <= xdf2->dend; i++, recs++) {
hav = (*recs)->ha;
rhi = (long) XDL_HASHLONG(hav, xdf1->hbits);
- for (rec = xdf1->rhash[rhi]; rec; rec = rec->next)
- if (rec->ha == hav && ++dis2[i] == 2)
+ for (nm = 0, rec = xdf1->rhash[rhi]; rec; rec = rec->next)
+ if (rec->ha == hav && ++nm == mlim)
break;
+ dis2[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
}
for (nreff = 0, i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart];
projects / git.git / commitdiff