diff options
Diffstat (limited to 'sha1_name.c')
| -rw-r--r-- | sha1_name.c | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/sha1_name.c b/sha1_name.c index f64755fbc..4e9a05233 100644 --- a/sha1_name.c +++ b/sha1_name.c @@ -119,6 +119,9 @@ static int find_short_packed_object(int len, const unsigned char *match, unsigne return found; } +#define SHORT_NAME_NOT_FOUND (-1) +#define SHORT_NAME_AMBIGUOUS (-2) + static int find_unique_short_object(int len, char *canonical, unsigned char *res, unsigned char *sha1) { @@ -128,23 +131,24 @@ static int find_unique_short_object(int len, char *canonical, has_unpacked = find_short_object_filename(len, canonical, unpacked_sha1); has_packed = find_short_packed_object(len, res, packed_sha1); if (!has_unpacked && !has_packed) - return -1; + return SHORT_NAME_NOT_FOUND; if (1 < has_unpacked || 1 < has_packed) - return error("short SHA1 %.*s is ambiguous.", len, canonical); + return SHORT_NAME_AMBIGUOUS; if (has_unpacked != has_packed) { memcpy(sha1, (has_packed ? packed_sha1 : unpacked_sha1), 20); return 0; } /* Both have unique ones -- do they match? */ if (memcmp(packed_sha1, unpacked_sha1, 20)) - return error("short SHA1 %.*s is ambiguous.", len, canonical); + return -2; memcpy(sha1, packed_sha1, 20); return 0; } -static int get_short_sha1(const char *name, int len, unsigned char *sha1) +static int get_short_sha1(const char *name, int len, unsigned char *sha1, + int quietly) { - int i; + int i, status; char canonical[40]; unsigned char res[20]; @@ -171,7 +175,29 @@ static int get_short_sha1(const char *name, int len, unsigned char *sha1) res[i >> 1] |= val; } - return find_unique_short_object(i, canonical, res, sha1); + status = find_unique_short_object(i, canonical, res, sha1); + if (!quietly && (status == SHORT_NAME_AMBIGUOUS)) + return error("short SHA1 %.*s is ambiguous.", len, canonical); + return status; +} + +const char *find_unique_abbrev(const unsigned char *sha1, int len) +{ + int status; + static char hex[41]; + memcpy(hex, sha1_to_hex(sha1), 40); + while (len < 40) { + unsigned char sha1_ret[20]; + status = get_short_sha1(hex, len, sha1_ret, 1); + if (!status) { + hex[len] = 0; + return hex; + } + if (status != SHORT_NAME_AMBIGUOUS) + return NULL; + len++; + } + return NULL; } static int get_sha1_basic(const char *str, int len, unsigned char *sha1) @@ -292,7 +318,7 @@ 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, len, sha1); + return get_short_sha1(name, len, sha1, 0); } /* |