*/
#include "cache.h"
#include "diff.h"
+#include "tree.h"
-// What paths are we interested in?
-static int nr_paths = 0;
-static const char **paths = NULL;
-static int *pathlens = NULL;
-
-static void update_tree_entry(struct tree_desc *desc)
+static char *malloc_base(const char *base, int baselen, const char *path, int pathlen)
{
- void *buf = desc->buf;
- unsigned long size = desc->size;
- int len = strlen(buf) + 1 + 20;
-
- if (size < len)
- die("corrupt tree file");
- desc->buf = buf + len;
- desc->size = size - len;
-}
-
-static const unsigned char *extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
-{
- void *tree = desc->buf;
- unsigned long size = desc->size;
- int len = strlen(tree)+1;
- const unsigned char *sha1 = tree + len;
- const char *path = strchr(tree, ' ');
- unsigned int mode;
-
- if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
- die("corrupt tree file");
- *pathp = path+1;
- *modep = DIFF_FILE_CANON_MODE(mode);
- return sha1;
-}
-
-static char *malloc_base(const char *base, const char *path, int pathlen)
-{
- int baselen = strlen(base);
char *newbase = xmalloc(baselen + pathlen + 2);
memcpy(newbase, base, baselen);
memcpy(newbase + baselen, path, pathlen);
return newbase;
}
-static int show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base);
+static void show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc,
+ const char *base, int baselen);
-static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
+static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const char *base, int baselen, struct diff_options *opt)
{
unsigned mode1, mode2;
const char *path1, *path2;
const unsigned char *sha1, *sha2;
int cmp, pathlen1, pathlen2;
- sha1 = extract(t1, &path1, &mode1);
- sha2 = extract(t2, &path2, &mode2);
+ sha1 = tree_entry_extract(t1, &path1, &mode1);
+ sha2 = tree_entry_extract(t2, &path2, &mode2);
- pathlen1 = strlen(path1);
- pathlen2 = strlen(path2);
+ pathlen1 = tree_entry_len(path1, sha1);
+ pathlen2 = tree_entry_len(path2, sha2);
cmp = base_name_compare(path1, pathlen1, mode1, path2, pathlen2, mode2);
if (cmp < 0) {
- show_entry(opt, "-", t1, base);
+ show_entry(opt, "-", t1, base, baselen);
return -1;
}
if (cmp > 0) {
- show_entry(opt, "+", t2, base);
+ show_entry(opt, "+", t2, base, baselen);
return 1;
}
- if (!opt->find_copies_harder &&
- !memcmp(sha1, sha2, 20) && mode1 == mode2)
+ if (!opt->find_copies_harder && !hashcmp(sha1, sha2) && mode1 == mode2)
return 0;
/*
* file, we need to consider it a remove and an add.
*/
if (S_ISDIR(mode1) != S_ISDIR(mode2)) {
- show_entry(opt, "-", t1, base);
- show_entry(opt, "+", t2, base);
+ show_entry(opt, "-", t1, base, baselen);
+ show_entry(opt, "+", t2, base, baselen);
return 0;
}
if (opt->recursive && S_ISDIR(mode1)) {
int retval;
- char *newbase = malloc_base(base, path1, pathlen1);
+ char *newbase = malloc_base(base, baselen, path1, pathlen1);
if (opt->tree_in_recursive)
opt->change(opt, mode1, mode2,
sha1, sha2, base, path1);
return 0;
}
-static int interesting(struct tree_desc *desc, const char *base)
+/*
+ * Is a tree entry interesting given the pathspec we have?
+ *
+ * Return:
+ * - positive for yes
+ * - zero for no
+ * - negative for "no, and no subsequent entries will be either"
+ */
+static int tree_entry_interesting(struct tree_desc *desc, const char *base, int baselen, struct diff_options *opt)
{
const char *path;
+ const unsigned char *sha1;
unsigned mode;
int i;
- int baselen, pathlen;
+ int pathlen;
- if (!nr_paths)
+ if (!opt->nr_paths)
return 1;
- (void)extract(desc, &path, &mode);
+ sha1 = tree_entry_extract(desc, &path, &mode);
- pathlen = strlen(path);
- baselen = strlen(base);
+ pathlen = tree_entry_len(path, sha1);
- for (i=0; i < nr_paths; i++) {
- const char *match = paths[i];
- int matchlen = pathlens[i];
+ for (i=0; i < opt->nr_paths; i++) {
+ const char *match = opt->paths[i];
+ int matchlen = opt->pathlens[i];
if (baselen >= matchlen) {
/* If it doesn't match, move along... */
}
/* A whole sub-tree went away or appeared */
-static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base)
+static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base, int baselen)
{
while (desc->size) {
- if (interesting(desc, base))
- show_entry(opt, prefix, desc, base);
+ int show = tree_entry_interesting(desc, base, baselen, opt);
+ if (show < 0)
+ break;
+ if (show)
+ show_entry(opt, prefix, desc, base, baselen);
update_tree_entry(desc);
}
}
/* A file entry went away or appeared */
-static int show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base)
+static void show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc,
+ const char *base, int baselen)
{
unsigned mode;
const char *path;
- const unsigned char *sha1 = extract(desc, &path, &mode);
+ const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
if (opt->recursive && S_ISDIR(mode)) {
- char type[20];
- char *newbase = malloc_base(base, path, strlen(path));
+ enum object_type type;
+ int pathlen = tree_entry_len(path, sha1);
+ char *newbase = malloc_base(base, baselen, path, pathlen);
struct tree_desc inner;
void *tree;
- tree = read_sha1_file(sha1, type, &inner.size);
- if (!tree || strcmp(type, "tree"))
+ tree = read_sha1_file(sha1, &type, &inner.size);
+ if (!tree || type != OBJ_TREE)
die("corrupt tree sha %s", sha1_to_hex(sha1));
inner.buf = tree;
- show_tree(opt, prefix, &inner, newbase);
+ show_tree(opt, prefix, &inner, newbase, baselen + 1 + pathlen);
free(tree);
free(newbase);
- return 0;
+ } else {
+ opt->add_remove(opt, prefix[0], mode, sha1, base, path);
}
-
- opt->add_remove(opt, prefix[0], mode, sha1, base, path);
- return 0;
}
-int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
+static void skip_uninteresting(struct tree_desc *t, const char *base, int baselen, struct diff_options *opt)
{
- while (t1->size | t2->size) {
- if (nr_paths && t1->size && !interesting(t1, base)) {
- update_tree_entry(t1);
+ while (t->size) {
+ int show = tree_entry_interesting(t, base, baselen, opt);
+ if (!show) {
+ update_tree_entry(t);
continue;
}
- if (nr_paths && t2->size && !interesting(t2, base)) {
- update_tree_entry(t2);
- continue;
+ /* Skip it all? */
+ if (show < 0)
+ t->size = 0;
+ return;
+ }
+}
+
+int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
+{
+ int baselen = strlen(base);
+
+ for (;;) {
+ if (opt->quiet && opt->has_changes)
+ break;
+ if (opt->nr_paths) {
+ skip_uninteresting(t1, base, baselen, opt);
+ skip_uninteresting(t2, base, baselen, opt);
}
if (!t1->size) {
- show_entry(opt, "+", t2, base);
+ if (!t2->size)
+ break;
+ show_entry(opt, "+", t2, base, baselen);
update_tree_entry(t2);
continue;
}
if (!t2->size) {
- show_entry(opt, "-", t1, base);
+ show_entry(opt, "-", t1, base, baselen);
update_tree_entry(t1);
continue;
}
- switch (compare_tree_entry(t1, t2, base, opt)) {
+ switch (compare_tree_entry(t1, t2, base, baselen, opt)) {
case -1:
update_tree_entry(t1);
continue;
struct tree_desc t1, t2;
int retval;
- tree1 = read_object_with_reference(old, "tree", &t1.size, NULL);
+ tree1 = read_object_with_reference(old, tree_type, &t1.size, NULL);
if (!tree1)
die("unable to read source tree (%s)", sha1_to_hex(old));
- tree2 = read_object_with_reference(new, "tree", &t2.size, NULL);
+ tree2 = read_object_with_reference(new, tree_type, &t2.size, NULL);
if (!tree2)
die("unable to read destination tree (%s)", sha1_to_hex(new));
t1.buf = tree1;
return retval;
}
+int diff_root_tree_sha1(const unsigned char *new, const char *base, struct diff_options *opt)
+{
+ int retval;
+ void *tree;
+ struct tree_desc empty, real;
+
+ tree = read_object_with_reference(new, tree_type, &real.size, NULL);
+ if (!tree)
+ die("unable to read root tree (%s)", sha1_to_hex(new));
+ real.buf = tree;
+
+ empty.size = 0;
+ empty.buf = "";
+ retval = diff_tree(&empty, &real, base, opt);
+ free(tree);
+ return retval;
+}
+
static int count_paths(const char **paths)
{
int i = 0;
return i;
}
-void diff_tree_setup_paths(const char **p)
+void diff_tree_release_paths(struct diff_options *opt)
{
+ free(opt->pathlens);
+}
+
+void diff_tree_setup_paths(const char **p, struct diff_options *opt)
+{
+ opt->nr_paths = 0;
+ opt->pathlens = NULL;
+ opt->paths = NULL;
+
if (p) {
int i;
- paths = p;
- nr_paths = count_paths(paths);
- if (nr_paths == 0) {
- pathlens = NULL;
+ opt->paths = p;
+ opt->nr_paths = count_paths(p);
+ if (opt->nr_paths == 0) {
+ opt->pathlens = NULL;
return;
}
- pathlens = xmalloc(nr_paths * sizeof(int));
- for (i=0; i<nr_paths; i++)
- pathlens[i] = strlen(paths[i]);
+ opt->pathlens = xmalloc(opt->nr_paths * sizeof(int));
+ for (i=0; i < opt->nr_paths; i++)
+ opt->pathlens[i] = strlen(p[i]);
}
}