in archive-zip.c [286:548]
static int write_zip_entry(struct archiver_args *args,
const struct object_id *oid,
const char *path, size_t pathlen,
unsigned int mode,
void *buffer, unsigned long size)
{
struct zip_local_header header;
uintmax_t offset = zip_offset;
struct zip_extra_mtime extra;
struct zip64_extra extra64;
size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE;
int need_zip64_extra = 0;
unsigned long attr2;
unsigned long compressed_size;
unsigned long crc;
enum zip_method method;
unsigned char *out;
void *deflated = NULL;
struct git_istream *stream = NULL;
unsigned long flags = 0;
int is_binary = -1;
const char *path_without_prefix = path + args->baselen;
unsigned int creator_version = 0;
unsigned int version_needed = 10;
size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE;
size_t zip64_dir_extra_payload_size = 0;
crc = crc32(0, NULL, 0);
if (!has_only_ascii(path)) {
if (is_utf8(path))
flags |= ZIP_UTF8;
else
warning(_("path is not valid UTF-8: %s"), path);
}
if (pathlen > 0xffff) {
return error(_("path too long (%d chars, SHA1: %s): %s"),
(int)pathlen, oid_to_hex(oid), path);
}
if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
method = ZIP_METHOD_STORE;
attr2 = 16;
out = NULL;
compressed_size = 0;
} else if (S_ISREG(mode) || S_ISLNK(mode)) {
method = ZIP_METHOD_STORE;
attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) :
(mode & 0111) ? ((mode) << 16) : 0;
if (S_ISLNK(mode) || (mode & 0111))
creator_version = 0x0317;
if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
method = ZIP_METHOD_DEFLATE;
if (!buffer) {
enum object_type type;
stream = open_istream(args->repo, oid, &type, &size,
NULL);
if (!stream)
return error(_("cannot stream blob %s"),
oid_to_hex(oid));
flags |= ZIP_STREAM;
out = NULL;
} else {
crc = crc32(crc, buffer, size);
is_binary = entry_is_binary(args->repo->index,
path_without_prefix,
buffer, size);
out = buffer;
}
compressed_size = (method == ZIP_METHOD_STORE) ? size : 0;
} else {
return error(_("unsupported file mode: 0%o (SHA1: %s)"), mode,
oid_to_hex(oid));
}
if (creator_version > max_creator_version)
max_creator_version = creator_version;
if (buffer && method == ZIP_METHOD_DEFLATE) {
out = deflated = zlib_deflate_raw(buffer, size,
args->compression_level,
&compressed_size);
if (!out || compressed_size >= size) {
out = buffer;
method = ZIP_METHOD_STORE;
compressed_size = size;
}
}
copy_le16(extra.magic, 0x5455);
copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE);
extra.flags[0] = 1; /* just mtime */
copy_le32(extra.mtime, args->time);
if (size > 0xffffffff || compressed_size > 0xffffffff)
need_zip64_extra = 1;
if (stream && size > 0x7fffffff)
need_zip64_extra = 1;
if (need_zip64_extra)
version_needed = 45;
copy_le32(header.magic, 0x04034b50);
copy_le16(header.version, version_needed);
copy_le16(header.flags, flags);
copy_le16(header.compression_method, method);
copy_le16(header.mtime, zip_time);
copy_le16(header.mdate, zip_date);
if (need_zip64_extra) {
set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc);
header_extra_size += ZIP64_EXTRA_SIZE;
} else {
set_zip_header_data_desc(&header, size, compressed_size, crc);
}
copy_le16(header.filename_length, pathlen);
copy_le16(header.extra_length, header_extra_size);
write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
zip_offset += ZIP_LOCAL_HEADER_SIZE;
write_or_die(1, path, pathlen);
zip_offset += pathlen;
write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE);
zip_offset += ZIP_EXTRA_MTIME_SIZE;
if (need_zip64_extra) {
copy_le16(extra64.magic, 0x0001);
copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE);
copy_le64(extra64.size, size);
copy_le64(extra64.compressed_size, compressed_size);
write_or_die(1, &extra64, ZIP64_EXTRA_SIZE);
zip_offset += ZIP64_EXTRA_SIZE;
}
if (stream && method == ZIP_METHOD_STORE) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
for (;;) {
readlen = read_istream(stream, buf, sizeof(buf));
if (readlen <= 0)
break;
crc = crc32(crc, buf, readlen);
if (is_binary == -1)
is_binary = entry_is_binary(args->repo->index,
path_without_prefix,
buf, readlen);
write_or_die(1, buf, readlen);
}
close_istream(stream);
if (readlen)
return readlen;
compressed_size = size;
zip_offset += compressed_size;
write_zip_data_desc(size, compressed_size, crc);
} else if (stream && method == ZIP_METHOD_DEFLATE) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
git_zstream zstream;
int result;
size_t out_len;
unsigned char compressed[STREAM_BUFFER_SIZE * 2];
git_deflate_init_raw(&zstream, args->compression_level);
compressed_size = 0;
zstream.next_out = compressed;
zstream.avail_out = sizeof(compressed);
for (;;) {
readlen = read_istream(stream, buf, sizeof(buf));
if (readlen <= 0)
break;
crc = crc32(crc, buf, readlen);
if (is_binary == -1)
is_binary = entry_is_binary(args->repo->index,
path_without_prefix,
buf, readlen);
zstream.next_in = buf;
zstream.avail_in = readlen;
result = git_deflate(&zstream, 0);
if (result != Z_OK)
die(_("deflate error (%d)"), result);
out_len = zstream.next_out - compressed;
if (out_len > 0) {
write_or_die(1, compressed, out_len);
compressed_size += out_len;
zstream.next_out = compressed;
zstream.avail_out = sizeof(compressed);
}
}
close_istream(stream);
if (readlen)
return readlen;
zstream.next_in = buf;
zstream.avail_in = 0;
result = git_deflate(&zstream, Z_FINISH);
if (result != Z_STREAM_END)
die("deflate error (%d)", result);
git_deflate_end(&zstream);
out_len = zstream.next_out - compressed;
write_or_die(1, compressed, out_len);
compressed_size += out_len;
zip_offset += compressed_size;
write_zip_data_desc(size, compressed_size, crc);
} else if (compressed_size > 0) {
write_or_die(1, out, compressed_size);
zip_offset += compressed_size;
}
free(deflated);
if (compressed_size > 0xffffffff || size > 0xffffffff ||
offset > 0xffffffff) {
if (compressed_size >= 0xffffffff)
zip64_dir_extra_payload_size += 8;
if (size >= 0xffffffff)
zip64_dir_extra_payload_size += 8;
if (offset >= 0xffffffff)
zip64_dir_extra_payload_size += 8;
zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size;
}
strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */
strbuf_add_le(&zip_dir, 2, creator_version);
strbuf_add_le(&zip_dir, 2, version_needed);
strbuf_add_le(&zip_dir, 2, flags);
strbuf_add_le(&zip_dir, 2, method);
strbuf_add_le(&zip_dir, 2, zip_time);
strbuf_add_le(&zip_dir, 2, zip_date);
strbuf_add_le(&zip_dir, 4, crc);
strbuf_add_le(&zip_dir, 4, clamp32(compressed_size));
strbuf_add_le(&zip_dir, 4, clamp32(size));
strbuf_add_le(&zip_dir, 2, pathlen);
strbuf_add_le(&zip_dir, 2, zip_dir_extra_size);
strbuf_add_le(&zip_dir, 2, 0); /* comment length */
strbuf_add_le(&zip_dir, 2, 0); /* disk */
strbuf_add_le(&zip_dir, 2, !is_binary);
strbuf_add_le(&zip_dir, 4, attr2);
strbuf_add_le(&zip_dir, 4, clamp32(offset));
strbuf_add(&zip_dir, path, pathlen);
strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE);
if (zip64_dir_extra_payload_size) {
strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */
strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size);
if (size >= 0xffffffff)
strbuf_add_le(&zip_dir, 8, size);
if (compressed_size >= 0xffffffff)
strbuf_add_le(&zip_dir, 8, compressed_size);
if (offset >= 0xffffffff)
strbuf_add_le(&zip_dir, 8, offset);
}
zip_dir_entries++;
return 0;
}