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write with dynamic size

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This commit is contained in:
Andreas Stefl
2020-01-23 17:13:41 +01:00
parent e48d8bab88
commit 1e8c7ce810
2 changed files with 35 additions and 25 deletions
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56
miniz_zip.c
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@@ -3425,13 +3425,13 @@ mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const char *pArchive_n
return MZ_TRUE; return MZ_TRUE;
} }
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 size_to_add, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, 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) 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 = MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR;
mz_uint uncomp_crc32 = MZ_CRC32_INIT, level, num_alignment_padding_bytes; 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_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 = size_to_add, comp_size = 0; mz_uint64 local_dir_header_ofs, cur_archive_file_ofs = pZip->m_archive_size, uncomp_size = 0, comp_size = 0;
size_t archive_name_size; size_t archive_name_size;
mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE]; mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE];
mz_uint8 *pExtra_data = NULL; mz_uint8 *pExtra_data = NULL;
@@ -3453,7 +3453,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
pState = pZip->m_pState; pState = pZip->m_pState;
if ((!pState->m_zip64) && (uncomp_size > MZ_UINT32_MAX)) if ((!pState->m_zip64) && (max_size > MZ_UINT32_MAX))
{ {
/* Source file is too large for non-zip64 */ /* Source file is too large for non-zip64 */
/*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */ /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */
@@ -3510,7 +3510,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
} }
#endif #endif
if (uncomp_size <= 3) if (max_size <= 3)
level = 0; level = 0;
if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes)) if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes))
@@ -3526,7 +3526,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
MZ_ASSERT((cur_archive_file_ofs & (pZip->m_file_offset_alignment - 1)) == 0); MZ_ASSERT((cur_archive_file_ofs & (pZip->m_file_offset_alignment - 1)) == 0);
} }
if (uncomp_size && level) if (max_size && level)
{ {
method = MZ_DEFLATED; method = MZ_DEFLATED;
} }
@@ -3534,11 +3534,11 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
MZ_CLEAR_OBJ(local_dir_header); MZ_CLEAR_OBJ(local_dir_header);
if (pState->m_zip64) if (pState->m_zip64)
{ {
if (uncomp_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX) if (max_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX)
{ {
pExtra_data = extra_data; pExtra_data = extra_data;
extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL, extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (max_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
(uncomp_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);
} }
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)) 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))
@@ -3589,9 +3589,8 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
cur_archive_file_ofs += user_extra_data_len; cur_archive_file_ofs += user_extra_data_len;
} }
if (uncomp_size) if (max_size)
{ {
mz_uint64 uncomp_remaining = uncomp_size;
void *pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, MZ_ZIP_MAX_IO_BUF_SIZE); void *pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, MZ_ZIP_MAX_IO_BUF_SIZE);
if (!pRead_buf) if (!pRead_buf)
{ {
@@ -3600,19 +3599,27 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
if (!level) if (!level)
{ {
while (uncomp_remaining) while (1)
{ {
mz_uint n = (mz_uint)MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, uncomp_remaining); size_t n = read_callback(callback_opaque, file_ofs, pRead_buf, MZ_ZIP_MAX_IO_BUF_SIZE);
if ((read_callback(callback_opaque, file_ofs, pRead_buf, n) != n) || (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pRead_buf, n) != n)) if (n == 0)
break;
if ((n > MZ_ZIP_MAX_IO_BUF_SIZE) || (file_ofs + n > max_size))
{ {
pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf); pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
} }
file_ofs += n; if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pRead_buf, n) != n)
{
pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
}
file_ofs += n;
uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n); uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n);
uncomp_remaining -= n;
cur_archive_file_ofs += n; cur_archive_file_ofs += n;
} }
uncomp_size = file_ofs;
comp_size = uncomp_size; comp_size = uncomp_size;
} }
else else
@@ -3639,24 +3646,26 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
for (;;) for (;;)
{ {
size_t in_buf_size = (mz_uint32)MZ_MIN(uncomp_remaining, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE);
tdefl_status status; tdefl_status status;
tdefl_flush flush = TDEFL_NO_FLUSH; tdefl_flush flush = TDEFL_NO_FLUSH;
if (read_callback(callback_opaque, file_ofs, pRead_buf, in_buf_size)!= in_buf_size) size_t n = read_callback(callback_opaque, file_ofs, pRead_buf, MZ_ZIP_MAX_IO_BUF_SIZE);
if ((n > MZ_ZIP_MAX_IO_BUF_SIZE) || (file_ofs + n > max_size))
{ {
mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED); mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
break; break;
} }
file_ofs += in_buf_size; file_ofs += n;
uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, in_buf_size); uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n);
uncomp_remaining -= in_buf_size;
if (pZip->m_pNeeds_keepalive != NULL && pZip->m_pNeeds_keepalive(pZip->m_pIO_opaque)) if (pZip->m_pNeeds_keepalive != NULL && pZip->m_pNeeds_keepalive(pZip->m_pIO_opaque))
flush = TDEFL_FULL_FLUSH; flush = TDEFL_FULL_FLUSH;
status = tdefl_compress_buffer(pComp, pRead_buf, in_buf_size, uncomp_remaining ? flush : TDEFL_FINISH); if (n == 0)
flush = TDEFL_FINISH;
status = tdefl_compress_buffer(pComp, pRead_buf, n, flush);
if (status == TDEFL_STATUS_DONE) if (status == TDEFL_STATUS_DONE)
{ {
result = MZ_TRUE; result = MZ_TRUE;
@@ -3677,6 +3686,7 @@ mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pA
return MZ_FALSE; return MZ_FALSE;
} }
uncomp_size = file_ofs;
comp_size = state.m_comp_size; comp_size = state.m_comp_size;
cur_archive_file_ofs = state.m_cur_archive_file_ofs; cur_archive_file_ofs = state.m_cur_archive_file_ofs;
} }
@@ -3741,10 +3751,10 @@ static size_t mz_file_read_func_stdio(void *pOpaque, mz_uint64 file_ofs, void *p
return MZ_FREAD(pBuf, 1, n, pSrc_file); return MZ_FREAD(pBuf, 1, n, pSrc_file);
} }
mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, mz_uint64 size_to_add, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, 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) const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len)
{ {
return mz_zip_writer_add_read_buf_callback(pZip, pArchive_name, mz_file_read_func_stdio, pSrc_file, size_to_add, pFile_time, pComment, comment_size, level_and_flags, return mz_zip_writer_add_read_buf_callback(pZip, pArchive_name, mz_file_read_func_stdio, pSrc_file, max_size, pFile_time, pComment, comment_size, level_and_flags,
user_extra_data, user_extra_data_len, user_extra_data_central, user_extra_data_central_len); user_extra_data, user_extra_data_len, user_extra_data_central, user_extra_data_central_len);
} }

4
miniz_zip.h
View File

@@ -380,7 +380,7 @@ MINIZ_EXPORT mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const cha
/* Adds the contents of a file to an archive. This function also records the disk file's modified time into the archive. */ /* Adds the contents of a file to an archive. This function also records the disk file's modified time into the archive. */
/* File data is supplied via a read callback function. User mz_zip_writer_add_(c)file to add a file directly.*/ /* File data is supplied via a read callback function. User mz_zip_writer_add_(c)file to add a file directly.*/
MINIZ_EXPORT 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 size_to_add, MINIZ_EXPORT 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_local, mz_uint user_extra_data_local_len, 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); const char *user_extra_data_central, mz_uint user_extra_data_central_len);
@@ -390,7 +390,7 @@ MINIZ_EXPORT mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, c
MINIZ_EXPORT mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags); MINIZ_EXPORT mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags);
/* Like mz_zip_writer_add_file(), except the file data is read from the specified FILE stream. */ /* Like mz_zip_writer_add_file(), except the file data is read from the specified FILE stream. */
MINIZ_EXPORT mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, mz_uint64 size_to_add, MINIZ_EXPORT mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, 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_local, mz_uint user_extra_data_local_len, 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); const char *user_extra_data_central, mz_uint user_extra_data_central_len);
#endif #endif