diff options
Diffstat (limited to 'streaming.c')
| -rw-r--r-- | streaming.c | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/streaming.c b/streaming.c index 71072e1b1d..4d978e54e4 100644 --- a/streaming.c +++ b/streaming.c @@ -99,7 +99,7 @@ int close_istream(struct git_istream *st) return r; } -ssize_t read_istream(struct git_istream *st, char *buf, size_t sz) +ssize_t read_istream(struct git_istream *st, void *buf, size_t sz) { return st->vtbl->read(st, buf, sz); } @@ -121,7 +121,7 @@ static enum input_source istream_source(const unsigned char *sha1, case OI_LOOSE: return loose; case OI_PACKED: - if (!oi->u.packed.is_delta && big_file_threshold <= size) + if (!oi->u.packed.is_delta && big_file_threshold < size) return pack_non_delta; /* fallthru */ default: @@ -489,3 +489,58 @@ static open_method_decl(incore) return st->u.incore.buf ? 0 : -1; } + + +/**************************************************************** + * Users of streaming interface + ****************************************************************/ + +int stream_blob_to_fd(int fd, unsigned const char *sha1, struct stream_filter *filter, + int can_seek) +{ + struct git_istream *st; + enum object_type type; + unsigned long sz; + ssize_t kept = 0; + int result = -1; + + st = open_istream(sha1, &type, &sz, filter); + if (!st) + return result; + if (type != OBJ_BLOB) + goto close_and_exit; + for (;;) { + char buf[1024 * 16]; + ssize_t wrote, holeto; + ssize_t readlen = read_istream(st, buf, sizeof(buf)); + + if (!readlen) + break; + if (can_seek && sizeof(buf) == readlen) { + for (holeto = 0; holeto < readlen; holeto++) + if (buf[holeto]) + break; + if (readlen == holeto) { + kept += holeto; + continue; + } + } + + if (kept && lseek(fd, kept, SEEK_CUR) == (off_t) -1) + goto close_and_exit; + else + kept = 0; + wrote = write_in_full(fd, buf, readlen); + + if (wrote != readlen) + goto close_and_exit; + } + if (kept && (lseek(fd, kept - 1, SEEK_CUR) == (off_t) -1 || + write(fd, "", 1) != 1)) + goto close_and_exit; + result = 0; + + close_and_exit: + close_istream(st); + return result; +} |