*/
#include "cache.h"
#include "archive.h"
+#include "streaming.h"
static int zip_date;
static int zip_time;
static unsigned int zip_dir_entries;
#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
+#define ZIP_STREAM (8)
struct zip_local_header {
unsigned char magic[4];
unsigned char _end[1];
};
+struct zip_data_desc {
+ unsigned char magic[4];
+ unsigned char crc32[4];
+ unsigned char compressed_size[4];
+ unsigned char size[4];
+ unsigned char _end[1];
+};
+
struct zip_dir_header {
unsigned char magic[4];
unsigned char creator_version[2];
* we're interested in.
*/
#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
+#define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end)
#define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end)
#define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end)
return buffer;
}
+static void write_zip_data_desc(unsigned long size,
+ unsigned long compressed_size,
+ unsigned long crc)
+{
+ struct zip_data_desc trailer;
+
+ copy_le32(trailer.magic, 0x08074b50);
+ copy_le32(trailer.crc32, crc);
+ copy_le32(trailer.compressed_size, compressed_size);
+ copy_le32(trailer.size, size);
+ write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE);
+}
+
+static void set_zip_dir_data_desc(struct zip_dir_header *header,
+ unsigned long size,
+ unsigned long compressed_size,
+ unsigned long crc)
+{
+ copy_le32(header->crc32, crc);
+ copy_le32(header->compressed_size, compressed_size);
+ copy_le32(header->size, size);
+}
+
+static void set_zip_header_data_desc(struct zip_local_header *header,
+ unsigned long size,
+ unsigned long compressed_size,
+ unsigned long crc)
+{
+ copy_le32(header->crc32, crc);
+ copy_le32(header->compressed_size, compressed_size);
+ copy_le32(header->size, size);
+}
+
+#define STREAM_BUFFER_SIZE (1024 * 16)
+
static int write_zip_entry(struct archiver_args *args,
- const unsigned char *sha1, const char *path, size_t pathlen,
- unsigned int mode, void *buffer, unsigned long size)
+ const unsigned char *sha1,
+ const char *path, size_t pathlen,
+ unsigned int mode)
{
struct zip_local_header header;
struct zip_dir_header dirent;
unsigned long attr2;
unsigned long compressed_size;
- unsigned long uncompressed_size;
unsigned long crc;
unsigned long direntsize;
int method;
unsigned char *out;
void *deflated = NULL;
+ void *buffer;
+ struct git_istream *stream = NULL;
+ unsigned long flags = 0;
+ unsigned long size;
crc = crc32(0, NULL, 0);
method = 0;
attr2 = 16;
out = NULL;
- uncompressed_size = 0;
+ size = 0;
compressed_size = 0;
+ buffer = NULL;
+ size = 0;
} else if (S_ISREG(mode) || S_ISLNK(mode)) {
+ enum object_type type = sha1_object_info(sha1, &size);
+
method = 0;
attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) :
(mode & 0111) ? ((mode) << 16) : 0;
- if (S_ISREG(mode) && args->compression_level != 0)
+ if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
method = 8;
- crc = crc32(crc, buffer, size);
- out = buffer;
- uncompressed_size = size;
compressed_size = size;
+
+ if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert &&
+ size > big_file_threshold) {
+ stream = open_istream(sha1, &type, &size, NULL);
+ if (!stream)
+ return error("cannot stream blob %s",
+ sha1_to_hex(sha1));
+ flags |= ZIP_STREAM;
+ out = buffer = NULL;
+ } else {
+ buffer = sha1_file_to_archive(args, path, sha1, mode,
+ &type, &size);
+ if (!buffer)
+ return error("cannot read %s",
+ sha1_to_hex(sha1));
+ crc = crc32(crc, buffer, size);
+ out = buffer;
+ }
} else {
return error("unsupported file mode: 0%o (SHA1: %s)", mode,
sha1_to_hex(sha1));
}
- if (method == 8) {
+ if (buffer && method == 8) {
deflated = zlib_deflate(buffer, size, args->compression_level,
&compressed_size);
if (deflated && compressed_size - 6 < size) {
copy_le16(dirent.creator_version,
S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
copy_le16(dirent.version, 10);
- copy_le16(dirent.flags, 0);
+ copy_le16(dirent.flags, flags);
copy_le16(dirent.compression_method, method);
copy_le16(dirent.mtime, zip_time);
copy_le16(dirent.mdate, zip_date);
- copy_le32(dirent.crc32, crc);
- copy_le32(dirent.compressed_size, compressed_size);
- copy_le32(dirent.size, uncompressed_size);
+ set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
copy_le16(dirent.filename_length, pathlen);
copy_le16(dirent.extra_length, 0);
copy_le16(dirent.comment_length, 0);
copy_le16(dirent.attr1, 0);
copy_le32(dirent.attr2, attr2);
copy_le32(dirent.offset, zip_offset);
- memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
- zip_dir_offset += ZIP_DIR_HEADER_SIZE;
- memcpy(zip_dir + zip_dir_offset, path, pathlen);
- zip_dir_offset += pathlen;
- zip_dir_entries++;
copy_le32(header.magic, 0x04034b50);
copy_le16(header.version, 10);
- copy_le16(header.flags, 0);
+ copy_le16(header.flags, flags);
copy_le16(header.compression_method, method);
copy_le16(header.mtime, zip_time);
copy_le16(header.mdate, zip_date);
- copy_le32(header.crc32, crc);
- copy_le32(header.compressed_size, compressed_size);
- copy_le32(header.size, uncompressed_size);
+ if (flags & ZIP_STREAM)
+ set_zip_header_data_desc(&header, 0, 0, 0);
+ else
+ set_zip_header_data_desc(&header, size, compressed_size, crc);
copy_le16(header.filename_length, pathlen);
copy_le16(header.extra_length, 0);
write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
zip_offset += ZIP_LOCAL_HEADER_SIZE;
write_or_die(1, path, pathlen);
zip_offset += pathlen;
- if (compressed_size > 0) {
+ if (stream && method == 0) {
+ 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);
+ 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);
+ zip_offset += ZIP_DATA_DESC_SIZE;
+
+ set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
+ } else if (stream && method == 8) {
+ 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];
+
+ memset(&zstream, 0, sizeof(zstream));
+ git_deflate_init(&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);
+
+ zstream.next_in = buf;
+ zstream.avail_in = readlen;
+ result = git_deflate(&zstream, 0);
+ if (result != Z_OK)
+ die("deflate error (%d)", result);
+ out = compressed;
+ if (!compressed_size)
+ out += 2;
+ out_len = zstream.next_out - out;
+
+ if (out_len > 0) {
+ write_or_die(1, out, 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 = compressed;
+ if (!compressed_size)
+ out += 2;
+ out_len = zstream.next_out - out - 4;
+ write_or_die(1, out, out_len);
+ compressed_size += out_len;
+ zip_offset += compressed_size;
+
+ write_zip_data_desc(size, compressed_size, crc);
+ zip_offset += ZIP_DATA_DESC_SIZE;
+
+ set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
+ } else if (compressed_size > 0) {
write_or_die(1, out, compressed_size);
zip_offset += compressed_size;
}
free(deflated);
+ free(buffer);
+
+ memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
+ zip_dir_offset += ZIP_DIR_HEADER_SIZE;
+ memcpy(zip_dir + zip_dir_offset, path, pathlen);
+ zip_dir_offset += pathlen;
+ zip_dir_entries++;
return 0;
}