X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=refs.c;h=161018097def05f717ae20e59e3df6cc1b01ab77;hb=b893f09104ee5f1d8710dfe17cdf1cbac995f17a;hp=9973d1fc21e9d14f4cf1d30cb59f55cdfd7fc1e7;hpb=95fc75129acf14d980bdd56b9b2ee74190f81d91;p=git.git

diff --git a/refs.c b/refs.c
index 9973d1fc..16101809 100644
--- a/refs.c
+++ b/refs.c
@@ -3,6 +3,84 @@
 
 #include <errno.h>
 
+static int read_ref(const char *refname, unsigned char *sha1)
+{
+	int ret = -1;
+	int fd = open(git_path("%s", refname), O_RDONLY);
+
+	if (fd >= 0) {
+		char buffer[60];
+		if (read(fd, buffer, sizeof(buffer)) >= 40)
+			ret = get_sha1_hex(buffer, sha1);
+		close(fd);
+	}
+	return ret;
+}
+
+static int do_for_each_ref(const char *base, int (*fn)(const char *path, const unsigned char *sha1))
+{
+	int retval = 0;
+	DIR *dir = opendir(git_path("%s", base));
+
+	if (dir) {
+		struct dirent *de;
+		int baselen = strlen(base);
+		char *path = xmalloc(baselen + 257);
+
+		if (!strncmp(base, "./", 2)) {
+			base += 2;
+			baselen -= 2;
+		}
+		memcpy(path, base, baselen);
+		if (baselen && base[baselen-1] != '/')
+			path[baselen++] = '/';
+
+		while ((de = readdir(dir)) != NULL) {
+			unsigned char sha1[20];
+			struct stat st;
+			int namelen;
+
+			if (de->d_name[0] == '.')
+				continue;
+			namelen = strlen(de->d_name);
+			if (namelen > 255)
+				continue;
+			memcpy(path + baselen, de->d_name, namelen+1);
+			if (stat(git_path("%s", path), &st) < 0)
+				continue;
+			if (S_ISDIR(st.st_mode)) {
+				retval = do_for_each_ref(path, fn);
+				if (retval)
+					break;
+				continue;
+			}
+			if (read_ref(path, sha1) < 0)
+				continue;
+			if (!has_sha1_file(sha1))
+				continue;
+			retval = fn(path, sha1);
+			if (retval)
+				break;
+		}
+		free(path);
+		closedir(dir);
+	}
+	return retval;
+}
+
+int head_ref(int (*fn)(const char *path, const unsigned char *sha1))
+{
+	unsigned char sha1[20];
+	if (!read_ref("HEAD", sha1))
+		return fn("HEAD", sha1);
+	return 0;
+}
+
+int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1))
+{
+	return do_for_each_ref("refs", fn);
+}
+
 static char *ref_file_name(const char *ref)
 {
 	char *base = get_refs_directory();