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miniz.c: extract a single file to heap from a memory buffer

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The new function "mz_zip_extract_archive_file_to_heap_from_buffer" does the same as "mz_zip_extract_archive_file_to_heap". Instead of dealing directly with a file path it does the proper thing with a memory buffer. It is useful when the contents of a file were already loaded in memory, avoiding the redundant action of loading the file again, hence saving precious time.
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rtorreshavi 2017-01-27 11:00:40 +01:00 committed by GitHub
parent 28f5066e33
commit f61dcc2dc3
1 changed files with 25 additions and 0 deletions
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miniz.c
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@ -4875,7 +4875,32 @@ void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char
mz_zip_reader_end(&zip_archive);
return p;
}
void *mz_zip_extract_archive_file_to_heap_from_buffer(const void *zipBuffer, size_t zipBufferSize, const char *pArchive_name, size_t *pSize, mz_uint flags)
{
int file_index;
mz_zip_archive zip_archive;
void *p = NULL;
if (pSize)
*pSize = 0;
if ((!zipBuffer) || (!zipBufferSize))
return NULL;
if (!pArchive_name)
return NULL;
MZ_CLEAR_OBJ(zip_archive);
if (!mz_zip_reader_init_mem(&zip_archive, zipBuffer, zipBufferSize, flags | MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY))
return NULL;
if ((file_index = mz_zip_reader_locate_file(&zip_archive, pArchive_name, NULL, flags)) >= 0)
p = mz_zip_reader_extract_to_heap(&zip_archive, file_index, pSize, flags);
mz_zip_reader_end(&zip_archive);
return p;
}
#endif // #ifndef MINIZ_NO_STDIO
#endif // #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS