summaryrefslogtreecommitdiff
path: root/archive-zip.c
diff options
context:
space:
mode:
Diffstat (limited to 'archive-zip.c')
-rw-r--r--archive-zip.c93
1 files changed, 61 insertions, 32 deletions
diff --git a/archive-zip.c b/archive-zip.c
index f5af81f904..4bde019bce 100644
--- a/archive-zip.c
+++ b/archive-zip.c
@@ -4,6 +4,7 @@
#include "cache.h"
#include "archive.h"
#include "streaming.h"
+#include "utf8.h"
static int zip_date;
static int zip_time;
@@ -16,7 +17,8 @@ static unsigned int zip_dir_offset;
static unsigned int zip_dir_entries;
#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
-#define ZIP_STREAM (8)
+#define ZIP_STREAM (1 << 3)
+#define ZIP_UTF8 (1 << 11)
struct zip_local_header {
unsigned char magic[4];
@@ -74,6 +76,14 @@ struct zip_dir_trailer {
unsigned char _end[1];
};
+struct zip_extra_mtime {
+ unsigned char magic[2];
+ unsigned char extra_size[2];
+ unsigned char flags[1];
+ unsigned char mtime[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
@@ -83,6 +93,9 @@ struct zip_dir_trailer {
#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)
+#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))
static void copy_le16(unsigned char *dest, unsigned int n)
{
@@ -98,8 +111,9 @@ static void copy_le32(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 *zlib_deflate_raw(void *data, unsigned long size,
+ int compression_level,
+ unsigned long *compressed_size)
{
git_zstream stream;
unsigned long maxsize;
@@ -107,7 +121,7 @@ static void *zlib_deflate(void *data, unsigned long size,
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);
@@ -164,6 +178,17 @@ static void set_zip_header_data_desc(struct zip_local_header *header,
copy_le32(header->size, size);
}
+static int has_only_ascii(const char *s)
+{
+ for (;;) {
+ int c = *s++;
+ if (c == '\0')
+ return 1;
+ if (!isascii(c))
+ return 0;
+ }
+}
+
#define STREAM_BUFFER_SIZE (1024 * 16)
static int write_zip_entry(struct archiver_args *args,
@@ -173,6 +198,7 @@ static int write_zip_entry(struct archiver_args *args,
{
struct zip_local_header header;
struct zip_dir_header dirent;
+ struct zip_extra_mtime extra;
unsigned long attr2;
unsigned long compressed_size;
unsigned long crc;
@@ -187,6 +213,13 @@ static int write_zip_entry(struct archiver_args *args,
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, sha1_to_hex(sha1), path);
@@ -199,7 +232,6 @@ static int write_zip_entry(struct archiver_args *args,
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);
@@ -208,7 +240,6 @@ static int write_zip_entry(struct archiver_args *args,
(mode & 0111) ? ((mode) << 16) : 0;
if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
method = 8;
- compressed_size = size;
if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert &&
size > big_file_threshold) {
@@ -227,27 +258,30 @@ static int write_zip_entry(struct archiver_args *args,
crc = crc32(crc, 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 (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;
}
}
+ 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);
+
/* make sure we have enough free space in the dictionary */
- direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
+ 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);
@@ -263,7 +297,7 @@ static int write_zip_entry(struct archiver_args *args,
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, 0);
+ 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);
@@ -276,16 +310,15 @@ static int write_zip_entry(struct archiver_args *args,
copy_le16(header.compression_method, method);
copy_le16(header.mtime, zip_time);
copy_le16(header.mdate, zip_date);
- if (flags & ZIP_STREAM)
- set_zip_header_data_desc(&header, 0, 0, 0);
- else
- set_zip_header_data_desc(&header, size, compressed_size, crc);
+ set_zip_header_data_desc(&header, size, compressed_size, crc);
copy_le16(header.filename_length, pathlen);
- copy_le16(header.extra_length, 0);
+ copy_le16(header.extra_length, ZIP_EXTRA_MTIME_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 (stream && method == 0) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
@@ -317,7 +350,7 @@ static int write_zip_entry(struct archiver_args *args,
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;
@@ -334,13 +367,10 @@ static int write_zip_entry(struct archiver_args *args,
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);
@@ -358,11 +388,8 @@ static int write_zip_entry(struct archiver_args *args,
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;
@@ -382,6 +409,8 @@ static int write_zip_entry(struct archiver_args *args,
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;
zip_dir_entries++;
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 14:17:49 +0000