l10n: git.pot: v2.12.0 round 1 (239 new, 15 removed)
[gitweb.git] / streaming.c
index 71072e1b1da670cdb4b048a3a6e83a4ae806bf5f..9afa66b8be6c3b5481e4542c033bfebdb2abbfda 100644 (file)
@@ -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);
 }
@@ -111,17 +111,17 @@ static enum input_source istream_source(const unsigned char *sha1,
        unsigned long size;
        int status;
 
+       oi->typep = type;
        oi->sizep = &size;
-       status = sha1_object_info_extended(sha1, oi);
+       status = sha1_object_info_extended(sha1, oi, 0);
        if (status < 0)
                return stream_error;
-       *type = status;
 
        switch (oi->whence) {
        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:
@@ -135,7 +135,7 @@ struct git_istream *open_istream(const unsigned char *sha1,
                                 struct stream_filter *filter)
 {
        struct git_istream *st;
-       struct object_info oi;
+       struct object_info oi = OBJECT_INFO_INIT;
        const unsigned char *real = lookup_replace_object(sha1);
        enum input_source src = istream_source(real, type, &oi);
 
@@ -149,11 +149,13 @@ struct git_istream *open_istream(const unsigned char *sha1,
                        return NULL;
                }
        }
-       if (st && filter) {
+       if (filter) {
                /* Add "&& !is_null_stream_filter(filter)" for performance */
                struct git_istream *nst = attach_stream_filter(st, filter);
-               if (!nst)
+               if (!nst) {
                        close_istream(st);
+                       return NULL;
+               }
                st = nst;
        }
 
@@ -237,7 +239,7 @@ static read_method_decl(filtered)
                if (!fs->input_finished) {
                        fs->i_end = read_istream(fs->upstream, fs->ibuf, FILTER_BUFFER);
                        if (fs->i_end < 0)
-                               break;
+                               return -1;
                        if (fs->i_end)
                                continue;
                }
@@ -309,7 +311,7 @@ static read_method_decl(loose)
                        st->z_state = z_done;
                        break;
                }
-               if (status != Z_OK && status != Z_BUF_ERROR) {
+               if (status != Z_OK && (status != Z_BUF_ERROR || total_read < sz)) {
                        git_inflate_end(&st->z);
                        st->z_state = z_error;
                        return -1;
@@ -335,17 +337,17 @@ static open_method_decl(loose)
        st->u.loose.mapped = map_sha1_file(sha1, &st->u.loose.mapsize);
        if (!st->u.loose.mapped)
                return -1;
-       if (unpack_sha1_header(&st->z,
-                              st->u.loose.mapped,
-                              st->u.loose.mapsize,
-                              st->u.loose.hdr,
-                              sizeof(st->u.loose.hdr)) < 0) {
+       if ((unpack_sha1_header(&st->z,
+                               st->u.loose.mapped,
+                               st->u.loose.mapsize,
+                               st->u.loose.hdr,
+                               sizeof(st->u.loose.hdr)) < 0) ||
+           (parse_sha1_header(st->u.loose.hdr, &st->size) < 0)) {
                git_inflate_end(&st->z);
                munmap(st->u.loose.mapped, st->u.loose.mapsize);
                return -1;
        }
 
-       parse_sha1_header(st->u.loose.hdr, &st->size);
        st->u.loose.hdr_used = strlen(st->u.loose.hdr) + 1;
        st->u.loose.hdr_avail = st->z.total_out;
        st->z_state = z_used;
@@ -489,3 +491,63 @@ static open_method_decl(incore)
 
        return st->u.incore.buf ? 0 : -1;
 }
+
+
+/****************************************************************
+ * Users of streaming interface
+ ****************************************************************/
+
+int stream_blob_to_fd(int fd, const struct object_id *oid, 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(oid->hash, &type, &sz, filter);
+       if (!st) {
+               if (filter)
+                       free_stream_filter(filter);
+               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 < 0)
+                       goto close_and_exit;
+               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 ||
+                    xwrite(fd, "", 1) != 1))
+               goto close_and_exit;
+       result = 0;
+
+ close_and_exit:
+       close_istream(st);
+       return result;
+}