#include "quote.h"
#include "diff.h"
#include "diffcore.h"
-#include "xdiff/xdiff.h"
+#include "xdiff-interface.h"
static int use_size_cache;
return 0;
}
+struct diffstat_t {
+ struct xdiff_emit_state xm;
+
+ int nr;
+ int alloc;
+ struct diffstat_file {
+ char *name;
+ unsigned int added, deleted;
+ } **files;
+};
+
+static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
+ const char *name)
+{
+ struct diffstat_file *x;
+ x = xcalloc(sizeof (*x), 1);
+ if (diffstat->nr == diffstat->alloc) {
+ diffstat->alloc = alloc_nr(diffstat->alloc);
+ diffstat->files = xrealloc(diffstat->files,
+ diffstat->alloc * sizeof(x));
+ }
+ diffstat->files[diffstat->nr++] = x;
+ x->name = strdup(name);
+ return x;
+}
+
+static void diffstat_consume(void *priv, char *line, unsigned long len)
+{
+ struct diffstat_t *diffstat = priv;
+ struct diffstat_file *x = diffstat->files[diffstat->nr - 1];
+
+ if (line[0] == '+')
+ x->added++;
+ else if (line[0] == '-')
+ x->deleted++;
+}
+
+static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
+static const char minuses[]= "----------------------------------------------------------------------";
+
+static void show_stats(struct diffstat_t* data)
+{
+ char *prefix = "";
+ int i, len, add, del, total, adds = 0, dels = 0;
+ int max, max_change = 0, max_len = 0;
+ int total_files = data->nr;
+
+ if (data->nr == 0)
+ return;
+
+ printf("---\n");
+
+ for (i = 0; i < data->nr; i++) {
+ struct diffstat_file *file = data->files[i];
+
+ if (max_change < file->added + file->deleted)
+ max_change = file->added + file->deleted;
+ len = strlen(file->name);
+ if (max_len < len)
+ max_len = len;
+ }
+
+ for (i = 0; i < data->nr; i++) {
+ char *name = data->files[i]->name;
+ int added = data->files[i]->added;
+ int deleted = data->files[i]->deleted;
+
+ if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
+ char *qname = xmalloc(len + 1);
+ quote_c_style(name, qname, NULL, 0);
+ free(name);
+ data->files[i]->name = name = qname;
+ }
+
+ /*
+ * "scale" the filename
+ */
+ len = strlen(name);
+ max = max_len;
+ if (max > 50)
+ max = 50;
+ if (len > max) {
+ char *slash;
+ prefix = "...";
+ max -= 3;
+ name += len - max;
+ slash = strchr(name, '/');
+ if (slash)
+ name = slash;
+ }
+ len = max;
+
+ /*
+ * scale the add/delete
+ */
+ max = max_change;
+ if (max + len > 70)
+ max = 70 - len;
+
+ if (added < 0) {
+ /* binary file */
+ printf(" %s%-*s | Bin\n", prefix, len, name);
+ goto free_diffstat_file;
+ } else if (added + deleted == 0) {
+ total_files--;
+ goto free_diffstat_file;
+ }
+
+ add = added;
+ del = deleted;
+ total = add + del;
+ adds += add;
+ dels += del;
+
+ if (max_change > 0) {
+ total = (total * max + max_change / 2) / max_change;
+ add = (add * max + max_change / 2) / max_change;
+ del = total - add;
+ }
+ printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
+ len, name, added + deleted,
+ add, pluses, del, minuses);
+ free_diffstat_file:
+ free(data->files[i]->name);
+ free(data->files[i]);
+ }
+ free(data->files);
+ printf(" %d files changed, %d insertions(+), %d deletions(-)\n",
+ total_files, adds, dels);
+}
+
#define FIRST_FEW_BYTES 8000
static int mmfile_is_binary(mmfile_t *mf)
{
return;
}
+static void builtin_diffstat(const char *name_a, const char *name_b,
+ struct diff_filespec *one, struct diff_filespec *two,
+ struct diffstat_t *diffstat)
+{
+ mmfile_t mf1, mf2;
+ struct diffstat_file *data;
+
+ data = diffstat_add(diffstat, name_a ? name_a : name_b);
+
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
+
+ if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))
+ data->added = -1;
+ else {
+ /* Crazy xdl interfaces.. */
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 3;
+ xecfg.flags = XDL_EMIT_FUNCNAMES;
+ ecb.outf = xdiff_outf;
+ ecb.priv = diffstat;
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ }
+}
+
struct diff_filespec *alloc_filespec(const char *path)
{
int namelen = strlen(path);
free(other_munged);
}
+static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
+ struct diffstat_t *diffstat)
+{
+ const char *name;
+ const char *other;
+
+ if (DIFF_PAIR_UNMERGED(p)) {
+ /* unmerged */
+ builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat);
+ return;
+ }
+
+ name = p->one->path;
+ other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+
+ diff_fill_sha1_info(p->one);
+ diff_fill_sha1_info(p->two);
+
+ builtin_diffstat(name, other, p->one, p->two, diffstat);
+}
+
void diff_setup(struct diff_options *options)
{
memset(options, 0, sizeof(*options));
options->output_format = DIFF_FORMAT_PATCH;
options->with_raw = 1;
}
+ else if (!strcmp(arg, "--stat"))
+ options->output_format = DIFF_FORMAT_DIFFSTAT;
else if (!strcmp(arg, "-z"))
options->line_termination = 0;
else if (!strncmp(arg, "-l", 2))
if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
(DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
- return; /* no tree diffs in patch format */
+ return; /* no tree diffs in patch format */
run_diff(p, o);
}
+static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
+ struct diffstat_t *diffstat)
+{
+ if (diff_unmodified_pair(p))
+ return;
+
+ if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
+ (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
+ return; /* no tree diffs in patch format */
+
+ run_diffstat(p, o, diffstat);
+}
+
int diff_queue_is_empty(void)
{
struct diff_queue_struct *q = &diff_queued_diff;
static void flush_one_pair(struct diff_filepair *p,
int diff_output_format,
- struct diff_options *options)
+ struct diff_options *options,
+ struct diffstat_t *diffstat)
{
int inter_name_termination = '\t';
int line_termination = options->line_termination;
break;
default:
switch (diff_output_format) {
+ case DIFF_FORMAT_DIFFSTAT:
+ diff_flush_stat(p, options, diffstat);
+ break;
case DIFF_FORMAT_PATCH:
diff_flush_patch(p, options);
break;
struct diff_queue_struct *q = &diff_queued_diff;
int i;
int diff_output_format = options->output_format;
+ struct diffstat_t *diffstat = NULL;
+
+ if (diff_output_format == DIFF_FORMAT_DIFFSTAT) {
+ diffstat = xcalloc(sizeof (struct diffstat_t), 1);
+ diffstat->xm.consume = diffstat_consume;
+ }
if (options->with_raw) {
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- flush_one_pair(p, DIFF_FORMAT_RAW, options);
+ flush_one_pair(p, DIFF_FORMAT_RAW, options, NULL);
}
putchar(options->line_termination);
}
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- flush_one_pair(p, diff_output_format, options);
+ flush_one_pair(p, diff_output_format, options, diffstat);
diff_free_filepair(p);
}
+
+ if (diffstat) {
+ show_stats(diffstat);
+ free(diffstat);
+ }
+
free(q->queue);
q->queue = NULL;
q->nr = q->alloc = 0;
long *kvdf, long *kvdb, int need_min, xdpsplit_t *spl,
xdalgoenv_t *xenv);
static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1, long chg2);
+static int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo);
+
}
+static int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo) {
+ long ix, ixo, ixs, ixref, grpsiz, nrec = xdf->nrec;
+ char *rchg = xdf->rchg, *rchgo = xdfo->rchg;
+ xrecord_t **recs = xdf->recs;
+
+ /*
+ * This is the same of what GNU diff does. Move back and forward
+ * change groups for a consistent and pretty diff output. This also
+ * helps in finding joineable change groups and reduce the diff size.
+ */
+ for (ix = ixo = 0;;) {
+ /*
+ * Find the first changed line in the to-be-compacted file.
+ * We need to keep track of both indexes, so if we find a
+ * changed lines group on the other file, while scanning the
+ * to-be-compacted file, we need to skip it properly. Note
+ * that loops that are testing for changed lines on rchg* do
+ * not need index bounding since the array is prepared with
+ * a zero at position -1 and N.
+ */
+ for (; ix < nrec && !rchg[ix]; ix++)
+ while (rchgo[ixo++]);
+ if (ix == nrec)
+ break;
+
+ /*
+ * Record the start of a changed-group in the to-be-compacted file
+ * and find the end of it, on both to-be-compacted and other file
+ * indexes (ix and ixo).
+ */
+ ixs = ix;
+ for (ix++; rchg[ix]; ix++);
+ for (; rchgo[ixo]; ixo++);
+
+ do {
+ grpsiz = ix - ixs;
+
+ /*
+ * If the line before the current change group, is equal to
+ * the last line of the current change group, shift backward
+ * the group.
+ */
+ while (ixs > 0 && recs[ixs - 1]->ha == recs[ix - 1]->ha &&
+ XDL_RECMATCH(recs[ixs - 1], recs[ix - 1])) {
+ rchg[--ixs] = 1;
+ rchg[--ix] = 0;
+
+ /*
+ * This change might have joined two change groups,
+ * so we try to take this scenario in account by moving
+ * the start index accordingly (and so the other-file
+ * end-of-group index).
+ */
+ for (; rchg[ixs - 1]; ixs--);
+ while (rchgo[--ixo]);
+ }
+
+ /*
+ * Record the end-of-group position in case we are matched
+ * with a group of changes in the other file (that is, the
+ * change record before the enf-of-group index in the other
+ * file is set).
+ */
+ ixref = rchgo[ixo - 1] ? ix: nrec;
+
+ /*
+ * If the first line of the current change group, is equal to
+ * the line next of the current change group, shift forward
+ * the group.
+ */
+ while (ix < nrec && recs[ixs]->ha == recs[ix]->ha &&
+ XDL_RECMATCH(recs[ixs], recs[ix])) {
+ rchg[ixs++] = 0;
+ rchg[ix++] = 1;
+
+ /*
+ * This change might have joined two change groups,
+ * so we try to take this scenario in account by moving
+ * the start index accordingly (and so the other-file
+ * end-of-group index). Keep tracking the reference
+ * index in case we are shifting together with a
+ * corresponding group of changes in the other file.
+ */
+ for (; rchg[ix]; ix++);
+ while (rchgo[++ixo])
+ ixref = ix;
+ }
+ } while (grpsiz != ix - ixs);
+
+ /*
+ * Try to move back the possibly merged group of changes, to match
+ * the recorded postion in the other file.
+ */
+ while (ixref < ix) {
+ rchg[--ixs] = 1;
+ rchg[--ix] = 0;
+ while (rchgo[--ixo]);
+ }
+ }
+
+ return 0;
+}
+
+
int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr) {
xdchange_t *cscr = NULL, *xch;
char *rchg1 = xe->xdf1.rchg, *rchg2 = xe->xdf2.rchg;
return -1;
}
-
- if (xdl_build_script(&xe, &xscr) < 0) {
+ if (xdl_change_compact(&xe.xdf1, &xe.xdf2) < 0 ||
+ xdl_change_compact(&xe.xdf2, &xe.xdf1) < 0 ||
+ xdl_build_script(&xe, &xscr) < 0) {
xdl_free_env(&xe);
return -1;
}
-
if (xscr) {
if (xdl_emit_diff(&xe, xscr, ecb, xecfg) < 0) {
xdl_free_env(&xe);
return -1;
}
-
xdl_free_script(xscr);
}
-
xdl_free_env(&xe);
return 0;