Fix extended short SHA1 name completion

get_sha1() would not do sha1 completion of short SHA1's when they were
part of a more complex expression.  So doing

	git-rev-parse 727132834e6be48a93c1bd6458a29d474ce7d5d5^

would work, and return 87c6aeb4efdd4355918d127a91bd0adc5a02f8ff. But using
the shorthand version

	git-rev-list 72713^

wouldn't work.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/sha1_name.c b/sha1_name.c
index 133af3b..b4fed92 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -84,19 +84,19 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne
        return 0;
 }
 
-static int get_short_sha1(const char *name, unsigned char *sha1)
+static int get_short_sha1(const char *name, int len, unsigned char *sha1)
 {
        int i;
        char canonical[40];
        unsigned char res[20];
 
+       if (len < 4)
+               return -1;
        memset(res, 0, 20);
        memset(canonical, 'x', 40);
-       for (i = 0;;i++) {
+       for (i = 0; i < len ;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')
@@ -112,8 +112,6 @@ static int get_short_sha1(const char *name, unsigned char *sha1)
                        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))
@@ -254,7 +252,7 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
        ret = get_sha1_basic(name, len, sha1);
        if (!ret)
                return 0;
-       return get_short_sha1(name, sha1);
+       return get_short_sha1(name, len, sha1);
 }
 
 /*