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Add flag to set (compressed) size in local file header

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This commit is contained in:
Martin
2021-02-07 22:40:58 +01:00
parent b43f8a0c22
commit 75744d32d4
2 changed files with 54 additions and 5 deletions
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51
miniz_zip.c
View File

@@ -3437,7 +3437,7 @@ mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const char *pArchive_n
mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pArchive_name, mz_file_read_func read_callback, void* callback_opaque, mz_uint64 max_size, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags,
const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len)
{
mz_uint16 gen_flags = MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR;
mz_uint16 gen_flags = (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE) ? 0 : MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR;
mz_uint uncomp_crc32 = MZ_CRC32_INIT, level, num_alignment_padding_bytes;
mz_uint16 method = 0, dos_time = 0, dos_date = 0, ext_attributes = 0;
mz_uint64 local_dir_header_ofs, cur_archive_file_ofs = pZip->m_archive_size, uncomp_size = 0, comp_size = 0;
@@ -3447,7 +3447,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
mz_uint32 extra_size = 0;
mz_uint8 extra_data[MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE];
mz_zip_internal_state *pState;
mz_uint64 file_ofs = 0;
mz_uint64 file_ofs = 0, cur_archive_header_file_ofs;
if (!(level_and_flags & MZ_ZIP_FLAG_ASCII_FILENAME))
gen_flags |= MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8;
@@ -3546,8 +3546,14 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
if (max_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX)
{
pExtra_data = extra_data;
if (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE)
extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (max_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
(max_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
(max_size >= MZ_UINT32_MAX) ? &comp_size : NULL,
(local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
else
extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, NULL,
NULL,
(local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
}
if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len), 0, 0, 0, method, gen_flags, dos_time, dos_date))
@@ -3703,6 +3709,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
}
if (!(level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE))
{
mz_uint8 local_dir_footer[MZ_ZIP_DATA_DESCRIPTER_SIZE64];
mz_uint32 local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE32;
@@ -3730,6 +3737,44 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
cur_archive_file_ofs += local_dir_footer_size;
}
if (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE)
{
if (pExtra_data != NULL)
{
extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (max_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
(max_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
}
if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header,
(mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len),
(max_size >= MZ_UINT32_MAX) ? MZ_UINT32_MAX : uncomp_size,
(max_size >= MZ_UINT32_MAX) ? MZ_UINT32_MAX : comp_size,
uncomp_crc32, method, gen_flags, dos_time, dos_date))
return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);
cur_archive_header_file_ofs = local_dir_header_ofs;
if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
if (pExtra_data != NULL)
{
cur_archive_header_file_ofs += sizeof(local_dir_header);
if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
{
return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
}
cur_archive_header_file_ofs += archive_name_size;
if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, extra_data, extra_size) != extra_size)
return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
cur_archive_header_file_ofs += extra_size;
}
}
if (pExtra_data != NULL)
{
extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,

6
miniz_zip.h
View File

@@ -97,7 +97,10 @@ typedef enum {
MZ_ZIP_FLAG_VALIDATE_HEADERS_ONLY = 0x2000, /* validate the local headers, but don't decompress the entire file and check the crc32 */
MZ_ZIP_FLAG_WRITE_ZIP64 = 0x4000, /* always use the zip64 file format, instead of the original zip file format with automatic switch to zip64. Use as flags parameter with mz_zip_writer_init*_v2 */
MZ_ZIP_FLAG_WRITE_ALLOW_READING = 0x8000,
MZ_ZIP_FLAG_ASCII_FILENAME = 0x10000
MZ_ZIP_FLAG_ASCII_FILENAME = 0x10000,
/*After adding a compressed file, seek back
to local file header and set the correct sizes*/
MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE = 0x20000
} mz_zip_flags;
typedef enum {
@@ -384,6 +387,7 @@ MINIZ_EXPORT mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, c
const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, const char *user_extra_data_local, mz_uint user_extra_data_local_len,
const char *user_extra_data_central, mz_uint user_extra_data_central_len);
#ifndef MINIZ_NO_STDIO
/* Adds the contents of a disk file to an archive. This function also records the disk file's modified time into the archive. */
/* level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION. */