* Copyright (c) 2006 Rene Scharfe
*/
#include "cache.h"
+#include "config.h"
#include "archive.h"
#include "streaming.h"
#include "utf8.h"
+#include "userdiff.h"
+#include "xdiff-interface.h"
static int zip_date;
static int zip_time;
-static unsigned char *zip_dir;
-static unsigned int zip_dir_size;
+/* We only care about the "buf" part here. */
+static struct strbuf zip_dir;
-static unsigned int zip_offset;
-static unsigned int zip_dir_offset;
-static unsigned int zip_dir_entries;
+static uintmax_t zip_offset;
+static uint64_t zip_dir_entries;
+
+static unsigned int max_creator_version;
-#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
#define ZIP_STREAM (1 << 3)
#define ZIP_UTF8 (1 << 11)
unsigned char _end[1];
};
-struct zip_dir_header {
+struct zip64_data_desc {
unsigned char magic[4];
- unsigned char creator_version[2];
- unsigned char version[2];
- unsigned char flags[2];
- unsigned char compression_method[2];
- unsigned char mtime[2];
- unsigned char mdate[2];
unsigned char crc32[4];
- unsigned char compressed_size[4];
- unsigned char size[4];
- unsigned char filename_length[2];
- unsigned char extra_length[2];
- unsigned char comment_length[2];
- unsigned char disk[2];
- unsigned char attr1[2];
- unsigned char attr2[4];
- unsigned char offset[4];
+ unsigned char compressed_size[8];
+ unsigned char size[8];
unsigned char _end[1];
};
unsigned char _end[1];
};
+struct zip64_extra {
+ unsigned char magic[2];
+ unsigned char extra_size[2];
+ unsigned char size[8];
+ unsigned char compressed_size[8];
+ unsigned char _end[1];
+};
+
+struct zip64_dir_trailer {
+ unsigned char magic[4];
+ unsigned char record_size[8];
+ unsigned char creator_version[2];
+ unsigned char version[2];
+ unsigned char disk[4];
+ unsigned char directory_start_disk[4];
+ unsigned char entries_on_this_disk[8];
+ unsigned char entries[8];
+ unsigned char size[8];
+ unsigned char offset[8];
+ unsigned char _end[1];
+};
+
+struct zip64_dir_trailer_locator {
+ unsigned char magic[4];
+ unsigned char disk[4];
+ unsigned char offset[8];
+ unsigned char number_of_disks[4];
+ unsigned char _end[1];
+};
+
/*
* On ARM, padding is added at the end of the struct, so a simple
* sizeof(struct ...) reports two bytes more than the payload size
*/
#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
#define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end)
+#define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_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)
#define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end)
#define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \
(ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags))
+#define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end)
+#define ZIP64_EXTRA_PAYLOAD_SIZE \
+ (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size))
+#define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end)
+#define ZIP64_DIR_TRAILER_RECORD_SIZE \
+ (ZIP64_DIR_TRAILER_SIZE - \
+ offsetof(struct zip64_dir_trailer, creator_version))
+#define ZIP64_DIR_TRAILER_LOCATOR_SIZE \
+ offsetof(struct zip64_dir_trailer_locator, _end)
static void copy_le16(unsigned char *dest, unsigned int n)
{
dest[3] = 0xff & (n >> 030);
}
-static void *zlib_deflate(void *data, unsigned long size,
- int compression_level, unsigned long *compressed_size)
+static void copy_le64(unsigned char *dest, uint64_t n)
+{
+ dest[0] = 0xff & n;
+ dest[1] = 0xff & (n >> 010);
+ dest[2] = 0xff & (n >> 020);
+ dest[3] = 0xff & (n >> 030);
+ dest[4] = 0xff & (n >> 040);
+ dest[5] = 0xff & (n >> 050);
+ dest[6] = 0xff & (n >> 060);
+ dest[7] = 0xff & (n >> 070);
+}
+
+static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped)
+{
+ if (n <= max)
+ return n;
+ *clamped = 1;
+ return max;
+}
+
+static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped)
+{
+ copy_le16(dest, clamp_max(n, 0xffff, clamped));
+}
+
+static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped)
+{
+ copy_le32(dest, clamp_max(n, 0xffffffff, clamped));
+}
+
+static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n)
+{
+ while (size-- > 0) {
+ strbuf_addch(sb, n & 0xff);
+ n >>= 8;
+ }
+ return -!!n;
+}
+
+static uint32_t clamp32(uintmax_t n)
+{
+ const uintmax_t max = 0xffffffff;
+ return (n < max) ? n : max;
+}
+
+static void *zlib_deflate_raw(void *data, unsigned long size,
+ int compression_level,
+ unsigned long *compressed_size)
{
git_zstream stream;
unsigned long maxsize;
void *buffer;
int result;
- memset(&stream, 0, sizeof(stream));
- git_deflate_init(&stream, compression_level);
+ git_deflate_init_raw(&stream, compression_level);
maxsize = git_deflate_bound(&stream, size);
buffer = xmalloc(maxsize);
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);
+ if (size >= 0xffffffff || compressed_size >= 0xffffffff) {
+ struct zip64_data_desc trailer;
+ copy_le32(trailer.magic, 0x08074b50);
+ copy_le32(trailer.crc32, crc);
+ copy_le64(trailer.compressed_size, compressed_size);
+ copy_le64(trailer.size, size);
+ write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE);
+ zip_offset += ZIP64_DATA_DESC_SIZE;
+ } else {
+ 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);
+ zip_offset += ZIP_DATA_DESC_SIZE;
+ }
}
static void set_zip_header_data_desc(struct zip_local_header *header,
}
}
+static int entry_is_binary(const char *path, const void *buffer, size_t size)
+{
+ struct userdiff_driver *driver = userdiff_find_by_path(path);
+ if (!driver)
+ driver = userdiff_find_by_name("default");
+ if (driver->binary != -1)
+ return driver->binary;
+ return buffer_is_binary(buffer, size);
+}
+
#define STREAM_BUFFER_SIZE (1024 * 16)
static int write_zip_entry(struct archiver_args *args,
unsigned int mode)
{
struct zip_local_header header;
- struct zip_dir_header dirent;
+ 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;
- unsigned long direntsize;
int method;
unsigned char *out;
void *deflated = NULL;
struct git_istream *stream = NULL;
unsigned long flags = 0;
unsigned long size;
+ 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);
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_ISLNK(mode) || (mode & 0111))
+ creator_version = 0x0317;
if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
method = 8;
- compressed_size = (method == 0) ? size : 0;
if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert &&
size > big_file_threshold) {
return error("cannot read %s",
sha1_to_hex(sha1));
crc = crc32(crc, buffer, size);
+ is_binary = entry_is_binary(path_without_prefix,
+ buffer, size);
out = buffer;
}
+ compressed_size = (method == 0) ? size : 0;
} else {
return error("unsupported file mode: 0%o (SHA1: %s)", mode,
sha1_to_hex(sha1));
}
+ if (creator_version > max_creator_version)
+ max_creator_version = creator_version;
+
if (buffer && method == 8) {
- deflated = zlib_deflate(buffer, size, args->compression_level,
- &compressed_size);
- if (deflated && compressed_size - 6 < size) {
- /* ZLIB --> raw compressed data (see RFC 1950) */
- /* CMF and FLG ... */
- out = (unsigned char *)deflated + 2;
- compressed_size -= 6; /* ... and ADLER32 */
- } else {
+ out = deflated = zlib_deflate_raw(buffer, size,
+ args->compression_level,
+ &compressed_size);
+ if (!out || compressed_size >= size) {
+ out = buffer;
method = 0;
compressed_size = size;
}
extra.flags[0] = 1; /* just mtime */
copy_le32(extra.mtime, args->time);
- /* make sure we have enough free space in the dictionary */
- direntsize = ZIP_DIR_HEADER_SIZE + pathlen + ZIP_EXTRA_MTIME_SIZE;
- while (zip_dir_size < zip_dir_offset + direntsize) {
- zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
- zip_dir = xrealloc(zip_dir, zip_dir_size);
- }
+ if (size > 0xffffffff || compressed_size > 0xffffffff)
+ need_zip64_extra = 1;
+ if (stream && size > 0x7fffffff)
+ need_zip64_extra = 1;
- copy_le32(dirent.magic, 0x02014b50);
- copy_le16(dirent.creator_version,
- S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
- copy_le16(dirent.version, 10);
- copy_le16(dirent.flags, flags);
- copy_le16(dirent.compression_method, method);
- copy_le16(dirent.mtime, zip_time);
- copy_le16(dirent.mdate, zip_date);
- set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
- copy_le16(dirent.filename_length, pathlen);
- copy_le16(dirent.extra_length, ZIP_EXTRA_MTIME_SIZE);
- copy_le16(dirent.comment_length, 0);
- copy_le16(dirent.disk, 0);
- copy_le16(dirent.attr1, 0);
- copy_le32(dirent.attr2, attr2);
- copy_le32(dirent.offset, zip_offset);
+ if (need_zip64_extra)
+ version_needed = 45;
copy_le32(header.magic, 0x04034b50);
- copy_le16(header.version, 10);
+ 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);
- set_zip_header_data_desc(&header, size, compressed_size, crc);
+ 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, ZIP_EXTRA_MTIME_SIZE);
+ 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 == 0) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
if (readlen <= 0)
break;
crc = crc32(crc, buf, readlen);
+ if (is_binary == -1)
+ is_binary = entry_is_binary(path_without_prefix,
+ buf, readlen);
write_or_die(1, buf, readlen);
}
close_istream(stream);
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;
size_t out_len;
unsigned char compressed[STREAM_BUFFER_SIZE * 2];
- memset(&zstream, 0, sizeof(zstream));
- git_deflate_init(&zstream, args->compression_level);
+ git_deflate_init_raw(&zstream, args->compression_level);
compressed_size = 0;
zstream.next_out = compressed;
if (readlen <= 0)
break;
crc = crc32(crc, buf, readlen);
+ if (is_binary == -1)
+ is_binary = entry_is_binary(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 = compressed;
- if (!compressed_size)
- out += 2;
- out_len = zstream.next_out - out;
+ out_len = zstream.next_out - compressed;
if (out_len > 0) {
- write_or_die(1, out, out_len);
+ write_or_die(1, compressed, out_len);
compressed_size += out_len;
zstream.next_out = compressed;
zstream.avail_out = sizeof(compressed);
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);
+ 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);
- 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;
- memcpy(zip_dir + zip_dir_offset, &extra, ZIP_EXTRA_MTIME_SIZE);
- zip_dir_offset += ZIP_EXTRA_MTIME_SIZE;
+ 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;
}
+static void write_zip64_trailer(void)
+{
+ struct zip64_dir_trailer trailer64;
+ struct zip64_dir_trailer_locator locator64;
+
+ copy_le32(trailer64.magic, 0x06064b50);
+ copy_le64(trailer64.record_size, ZIP64_DIR_TRAILER_RECORD_SIZE);
+ copy_le16(trailer64.creator_version, max_creator_version);
+ copy_le16(trailer64.version, 45);
+ copy_le32(trailer64.disk, 0);
+ copy_le32(trailer64.directory_start_disk, 0);
+ copy_le64(trailer64.entries_on_this_disk, zip_dir_entries);
+ copy_le64(trailer64.entries, zip_dir_entries);
+ copy_le64(trailer64.size, zip_dir.len);
+ copy_le64(trailer64.offset, zip_offset);
+
+ copy_le32(locator64.magic, 0x07064b50);
+ copy_le32(locator64.disk, 0);
+ copy_le64(locator64.offset, zip_offset + zip_dir.len);
+ copy_le32(locator64.number_of_disks, 1);
+
+ write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE);
+ write_or_die(1, &locator64, ZIP64_DIR_TRAILER_LOCATOR_SIZE);
+}
+
static void write_zip_trailer(const unsigned char *sha1)
{
struct zip_dir_trailer trailer;
+ int clamped = 0;
copy_le32(trailer.magic, 0x06054b50);
copy_le16(trailer.disk, 0);
copy_le16(trailer.directory_start_disk, 0);
- copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
- copy_le16(trailer.entries, zip_dir_entries);
- copy_le32(trailer.size, zip_dir_offset);
- copy_le32(trailer.offset, zip_offset);
- copy_le16(trailer.comment_length, sha1 ? 40 : 0);
-
- write_or_die(1, zip_dir, zip_dir_offset);
+ copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries,
+ &clamped);
+ copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped);
+ copy_le32(trailer.size, zip_dir.len);
+ copy_le32_clamp(trailer.offset, zip_offset, &clamped);
+ copy_le16(trailer.comment_length, sha1 ? GIT_SHA1_HEXSZ : 0);
+
+ write_or_die(1, zip_dir.buf, zip_dir.len);
+ if (clamped)
+ write_zip64_trailer();
write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
if (sha1)
- write_or_die(1, sha1_to_hex(sha1), 40);
+ write_or_die(1, sha1_to_hex(sha1), GIT_SHA1_HEXSZ);
}
-static void dos_time(time_t *time, int *dos_date, int *dos_time)
+static void dos_time(timestamp_t *timestamp, int *dos_date, int *dos_time)
{
- struct tm *t = localtime(time);
+ time_t time;
+ struct tm *t;
+
+ if (date_overflows(*timestamp))
+ die("timestamp too large for this system: %"PRItime,
+ *timestamp);
+ time = (time_t)*timestamp;
+ t = localtime(&time);
+ *timestamp = time;
*dos_date = t->tm_mday + (t->tm_mon + 1) * 32 +
(t->tm_year + 1900 - 1980) * 512;
*dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048;
}
+static int archive_zip_config(const char *var, const char *value, void *data)
+{
+ return userdiff_config(var, value);
+}
+
static int write_zip_archive(const struct archiver *ar,
struct archiver_args *args)
{
int err;
+ git_config(archive_zip_config, NULL);
+
dos_time(&args->time, &zip_date, &zip_time);
- zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
- zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;
+ strbuf_init(&zip_dir, 0);
err = write_archive_entries(args, write_zip_entry);
if (!err)
write_zip_trailer(args->commit_sha1);
- free(zip_dir);
+ strbuf_release(&zip_dir);
return err;
}
projects / platform / upstream / git.git / blobdiff