diff options
| -rw-r--r-- | archive-zip.c | 36 | ||||
| -rw-r--r-- | cache.h | 1 | ||||
| -rw-r--r-- | zlib.c | 25 |
3 files changed, 34 insertions, 28 deletions
diff --git a/archive-zip.c b/archive-zip.c index a8d1193..b2c4fe0 100644 --- a/archive-zip.c +++ b/archive-zip.c @@ -111,8 +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; @@ -120,7 +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); @@ -265,14 +266,11 @@ static int write_zip_entry(struct archiver_args *args, } 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; } @@ -353,7 +351,7 @@ 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; @@ -370,13 +368,10 @@ 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); @@ -394,11 +389,8 @@ 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; @@ -34,6 +34,7 @@ int git_inflate(git_zstream *, int flush); void git_deflate_init(git_zstream *, int level); void git_deflate_init_gzip(git_zstream *, int level); +void git_deflate_init_raw(git_zstream *, int level); void git_deflate_end(git_zstream *); int git_deflate_abort(git_zstream *); int git_deflate_end_gently(git_zstream *); @@ -168,13 +168,8 @@ void git_deflate_init(git_zstream *strm, int level) strm->z.msg ? strm->z.msg : "no message"); } -void git_deflate_init_gzip(git_zstream *strm, int level) +static void do_git_deflate_init(git_zstream *strm, int level, int windowBits) { - /* - * Use default 15 bits, +16 is to generate gzip header/trailer - * instead of the zlib wrapper. - */ - const int windowBits = 15 + 16; int status; zlib_pre_call(strm); @@ -188,6 +183,24 @@ void git_deflate_init_gzip(git_zstream *strm, int level) strm->z.msg ? strm->z.msg : "no message"); } +void git_deflate_init_gzip(git_zstream *strm, int level) +{ + /* + * Use default 15 bits, +16 is to generate gzip header/trailer + * instead of the zlib wrapper. + */ + return do_git_deflate_init(strm, level, 15 + 16); +} + +void git_deflate_init_raw(git_zstream *strm, int level) +{ + /* + * Use default 15 bits, negate the value to get raw compressed + * data without zlib header and trailer. + */ + return do_git_deflate_init(strm, level, -15); +} + int git_deflate_abort(git_zstream *strm) { int status; |