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;
}
for (i = 0; i < data->nr; i++) {
+ char *prefix = "";
char *name = data->files[i]->name;
int added = data->files[i]->added;
int deleted = data->files[i]->deleted;
total_files, adds, dels);
}
-static void *encode_delta_size(void *data, unsigned long size)
+static unsigned char *deflate_it(char *data,
+ unsigned long size,
+ unsigned long *result_size)
{
- unsigned char *cp = data;
- *cp++ = size;
- size >>= 7;
- while (size) {
- cp[-1] |= 0x80;
- *cp++ = size;
- size >>= 7;
- }
- return cp;
+ int bound;
+ unsigned char *deflated;
+ z_stream stream;
+
+ memset(&stream, 0, sizeof(stream));
+ deflateInit(&stream, Z_BEST_COMPRESSION);
+ bound = deflateBound(&stream, size);
+ deflated = xmalloc(bound);
+ stream.next_out = deflated;
+ stream.avail_out = bound;
+
+ stream.next_in = (unsigned char *)data;
+ stream.avail_in = size;
+ while (deflate(&stream, Z_FINISH) == Z_OK)
+ ; /* nothing */
+ deflateEnd(&stream);
+ *result_size = stream.total_out;
+ return deflated;
}
-static void *safe_diff_delta(const unsigned char *src, unsigned long src_size,
- const unsigned char *dst, unsigned long dst_size,
- unsigned long *delta_size)
+static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
{
- unsigned long bufsize;
- unsigned char *data;
- unsigned char *cp;
-
- if (src_size && dst_size)
- return diff_delta(src, src_size, dst, dst_size, delta_size, 0);
+ void *cp;
+ void *delta;
+ void *deflated;
+ void *data;
+ unsigned long orig_size;
+ unsigned long delta_size;
+ unsigned long deflate_size;
+ unsigned long data_size;
- /* diff-delta does not like to do delta with empty, so
- * we do that by hand here. Sigh...
+ printf("GIT binary patch\n");
+ /* We could do deflated delta, or we could do just deflated two,
+ * whichever is smaller.
*/
-
- if (!src_size)
- /* literal copy can be done only 127-byte at a time.
- */
- bufsize = dst_size + (dst_size / 127) + 40;
- else
- bufsize = 40;
- data = xmalloc(bufsize);
- cp = encode_delta_size(data, src_size);
- cp = encode_delta_size(cp, dst_size);
-
- if (dst_size) {
- /* copy out literally */
- while (dst_size) {
- int sz = (127 < dst_size) ? 127 : dst_size;
- *cp++ = sz;
- dst_size -= sz;
- while (sz) {
- *cp++ = *dst++;
- sz--;
- }
+ delta = NULL;
+ deflated = deflate_it(two->ptr, two->size, &deflate_size);
+ if (one->size && two->size) {
+ delta = diff_delta(one->ptr, one->size,
+ two->ptr, two->size,
+ &delta_size, deflate_size);
+ if (delta) {
+ void *to_free = delta;
+ orig_size = delta_size;
+ delta = deflate_it(delta, delta_size, &delta_size);
+ free(to_free);
}
}
- *delta_size = (cp - data);
- return data;
-}
-static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
-{
- void *delta, *cp;
- unsigned long delta_size;
+ if (delta && delta_size < deflate_size) {
+ printf("delta %lu\n", orig_size);
+ free(deflated);
+ data = delta;
+ data_size = delta_size;
+ }
+ else {
+ printf("literal %lu\n", two->size);
+ free(delta);
+ data = deflated;
+ data_size = deflate_size;
+ }
- printf("GIT binary patch\n");
- delta = safe_diff_delta(one->ptr, one->size,
- two->ptr, two->size,
- &delta_size);
- if (!delta)
- die("unable to generate binary diff");
-
- /* emit delta encoded in base85 */
- cp = delta;
- while (delta_size) {
- int bytes = (52 < delta_size) ? 52 : delta_size;
+ /* emit data encoded in base85 */
+ cp = data;
+ while (data_size) {
+ int bytes = (52 < data_size) ? 52 : data_size;
char line[70];
- delta_size -= bytes;
+ data_size -= bytes;
if (bytes <= 26)
line[0] = bytes + 'A' - 1;
else
puts(line);
}
printf("\n");
- free(delta);
+ free(data);
}
#define FIRST_FEW_BYTES 8000
die("unable to read files to diff");
if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2)) {
- if (o->full_index)
+ /* Quite common confusing case */
+ if (mf1.size == mf2.size &&
+ !memcmp(mf1.ptr, mf2.ptr, mf1.size))
+ goto free_ab_and_return;
+ if (o->binary)
emit_binary_diff(&mf1, &mf2);
else
printf("Binary files %s and %s differ\n",
ecbdata.label_path = lbl;
xpp.flags = XDF_NEED_MINIMAL;
- xecfg.ctxlen = 3;
+ xecfg.ctxlen = o->context;
xecfg.flags = XDL_EMIT_FUNCNAMES;
if (!diffopts)
;
options->line_termination = '\n';
options->break_opt = -1;
options->rename_limit = -1;
+ options->context = 3;
options->change = diff_change;
options->add_remove = diff_addremove;
return 0;
}
+int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val)
+{
+ char c, *eq;
+ int len;
+
+ if (*arg != '-')
+ return 0;
+ c = *++arg;
+ if (!c)
+ return 0;
+ if (c == arg_short) {
+ c = *++arg;
+ if (!c)
+ return 1;
+ if (val && isdigit(c)) {
+ char *end;
+ int n = strtoul(arg, &end, 10);
+ if (*end)
+ return 0;
+ *val = n;
+ return 1;
+ }
+ return 0;
+ }
+ if (c != '-')
+ return 0;
+ arg++;
+ eq = strchr(arg, '=');
+ if (eq)
+ len = eq - arg;
+ else
+ len = strlen(arg);
+ if (!len || strncmp(arg, arg_long, len))
+ return 0;
+ if (eq) {
+ int n;
+ char *end;
+ if (!isdigit(*++eq))
+ return 0;
+ n = strtoul(eq, &end, 10);
+ if (*end)
+ return 0;
+ *val = n;
+ }
+ return 1;
+}
+
int diff_opt_parse(struct diff_options *options, const char **av, int ac)
{
const char *arg = av[0];
if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
options->output_format = DIFF_FORMAT_PATCH;
+ else if (opt_arg(arg, 'U', "unified", &options->context))
+ options->output_format = DIFF_FORMAT_PATCH;
else if (!strcmp(arg, "--patch-with-raw")) {
options->output_format = DIFF_FORMAT_PATCH;
options->with_raw = 1;
options->rename_limit = strtoul(arg+2, NULL, 10);
else if (!strcmp(arg, "--full-index"))
options->full_index = 1;
+ else if (!strcmp(arg, "--binary")) {
+ options->output_format = DIFF_FORMAT_PATCH;
+ options->full_index = options->binary = 1;
+ }
else if (!strcmp(arg, "--name-only"))
options->output_format = DIFF_FORMAT_NAME;
else if (!strcmp(arg, "--name-status"))
projects / git.git / blobdiff