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-rw-r--r--rev-parse.c188
1 files changed, 5 insertions, 183 deletions
diff --git a/rev-parse.c b/rev-parse.c
index 4bd58eb..1965e90 100644
--- a/rev-parse.c
+++ b/rev-parse.c
@@ -21,8 +21,6 @@ static int output_sq = 0;
#define REVERSED 1
static int show_type = NORMAL;
-static int get_extended_sha1(char *name, unsigned char *sha1);
-
/*
* Some arguments are relevant "revision" arguments,
* others are about output format or other details.
@@ -107,182 +105,6 @@ static void show_arg(char *arg)
show_norev(arg);
}
-static int get_parent(char *name, unsigned char *result, int idx)
-{
- unsigned char sha1[20];
- int ret = get_extended_sha1(name, sha1);
- struct commit *commit;
- struct commit_list *p;
-
- if (ret)
- return ret;
- commit = lookup_commit_reference(sha1);
- if (!commit)
- return -1;
- if (parse_commit(commit))
- return -1;
- if (!idx) {
- memcpy(result, commit->object.sha1, 20);
- return 0;
- }
- p = commit->parents;
- while (p) {
- if (!--idx) {
- memcpy(result, p->item->object.sha1, 20);
- return 0;
- }
- p = p->next;
- }
- return -1;
-}
-
-static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
-{
- static char dirname[PATH_MAX];
- char hex[40];
- DIR *dir;
- int found;
-
- snprintf(dirname, sizeof(dirname), "%s/%.2s", get_object_directory(), name);
- dir = opendir(dirname);
- sprintf(hex, "%.2s", name);
- found = 0;
- if (dir) {
- struct dirent *de;
- while ((de = readdir(dir)) != NULL) {
- if (strlen(de->d_name) != 38)
- continue;
- if (memcmp(de->d_name, name + 2, len-2))
- continue;
- memcpy(hex + 2, de->d_name, 38);
- if (++found > 1)
- break;
- }
- closedir(dir);
- }
- if (found == 1)
- return get_sha1_hex(hex, sha1) == 0;
- return 0;
-}
-
-static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b)
-{
- do {
- if (*a != *b)
- return 0;
- a++;
- b++;
- len -= 2;
- } while (len > 1);
- if (len)
- if ((*a ^ *b) & 0xf0)
- return 0;
- return 1;
-}
-
-static int find_short_packed_object(int len, const unsigned char *match, unsigned char *sha1)
-{
- struct packed_git *p;
-
- prepare_packed_git();
- for (p = packed_git; p; p = p->next) {
- unsigned num = num_packed_objects(p);
- unsigned first = 0, last = num;
- while (first < last) {
- unsigned mid = (first + last) / 2;
- unsigned char now[20];
- int cmp;
-
- nth_packed_object_sha1(p, mid, now);
- cmp = memcmp(match, now, 20);
- if (!cmp) {
- first = mid;
- break;
- }
- if (cmp > 0) {
- first = mid+1;
- continue;
- }
- last = mid;
- }
- if (first < num) {
- unsigned char now[20], next[20];
- nth_packed_object_sha1(p, first, now);
- if (match_sha(len, match, now)) {
- if (nth_packed_object_sha1(p, first+1, next) || !match_sha(len, match, next)) {
- memcpy(sha1, now, 20);
- return 1;
- }
- }
- }
- }
- return 0;
-}
-
-static int get_short_sha1(char *name, unsigned char *sha1)
-{
- int i;
- char canonical[40];
- unsigned char res[20];
-
- memset(res, 0, 20);
- memset(canonical, 'x', 40);
- for (i = 0;;i++) {
- unsigned char c = name[i];
- unsigned char val;
- if (!c || i > 40)
- break;
- if (c >= '0' && c <= '9')
- val = c - '0';
- else if (c >= 'a' && c <= 'f')
- val = c - 'a' + 10;
- else if (c >= 'A' && c <='F') {
- val = c - 'A' + 10;
- c -= 'A' - 'a';
- }
- else
- return -1;
- canonical[i] = c;
- if (!(i & 1))
- val <<= 4;
- res[i >> 1] |= val;
- }
- if (i < 4)
- return -1;
- if (find_short_object_filename(i, canonical, sha1))
- return 0;
- if (find_short_packed_object(i, res, sha1))
- return 0;
- return -1;
-}
-
-/*
- * This is like "get_sha1()", except it allows "sha1 expressions",
- * notably "xyz^" for "parent of xyz"
- */
-static int get_extended_sha1(char *name, unsigned char *sha1)
-{
- int parent, ret;
- int len = strlen(name);
-
- parent = 1;
- if (len > 2 && name[len-1] >= '0' && name[len-1] <= '9') {
- parent = name[len-1] - '0';
- len--;
- }
- if (len > 1 && name[len-1] == '^') {
- name[len-1] = 0;
- ret = get_parent(name, sha1, parent);
- name[len-1] = '^';
- if (!ret)
- return 0;
- }
- ret = get_sha1(name, sha1);
- if (!ret)
- return 0;
- return get_short_sha1(name, sha1);
-}
-
static void show_default(void)
{
char *s = def;
@@ -291,7 +113,7 @@ static void show_default(void)
unsigned char sha1[20];
def = NULL;
- if (!get_extended_sha1(s, sha1)) {
+ if (!get_sha1(s, sha1)) {
show_rev(NORMAL, sha1);
return;
}
@@ -372,10 +194,10 @@ int main(int argc, char **argv)
unsigned char end[20];
char *n = dotdot+2;
*dotdot = 0;
- if (!get_extended_sha1(arg, sha1)) {
+ if (!get_sha1(arg, sha1)) {
if (!*n)
n = "HEAD";
- if (!get_extended_sha1(n, end)) {
+ if (!get_sha1(n, end)) {
if (no_revs)
continue;
def = NULL;
@@ -386,14 +208,14 @@ int main(int argc, char **argv)
}
*dotdot = '.';
}
- if (!get_extended_sha1(arg, sha1)) {
+ if (!get_sha1(arg, sha1)) {
if (no_revs)
continue;
def = NULL;
show_rev(NORMAL, sha1);
continue;
}
- if (*arg == '^' && !get_extended_sha1(arg+1, sha1)) {
+ if (*arg == '^' && !get_sha1(arg+1, sha1)) {
if (no_revs)
continue;
def = NULL;