From b23a3ab831f91553d34a48f51370ed9525de07ac Mon Sep 17 00:00:00 2001 From: zlago Date: Tue, 24 Sep 2024 20:54:48 +0200 Subject: initial commit --- src/zip.h | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 src/zip.h (limited to 'src/zip.h') diff --git a/src/zip.h b/src/zip.h new file mode 100644 index 0000000..d8b3e02 --- /dev/null +++ b/src/zip.h @@ -0,0 +1,80 @@ +#pragma once + +#include +#include + +#define ZIP_FOOTER_MAGIC 0x06054b50 // "PK\5\6" +#define ZIP_CENTRAL_MAGIC 0x02014b50 // "PK\1\2" +#define ZIP_HEADER_MAGIC 0x04034b50 // "PK\3\4" + +struct zip_file *zip_index(char *const restrict file, size_t const size, int *const restrict /* _Nullable */ error); +char const *const zip_error(int const code); // error messages do NOT have any newlines + +struct zip_index { + struct zip_central *central; + struct zip_header *header; + void *data; + uint8_t *filename; + size_t filename_length; + uint16_t flags; + uint16_t method; + uint32_t crc32; + uint32_t compressed_size; + uint32_t original_size; +}; + +struct zip_file { + size_t file_count; + struct zip_index files[]; +}; + +struct dos_date { + uint16_t second: 5, minute: 6, hour: 5; + uint16_t day: 5, month: 4, year: 7; +}; + +struct __attribute__((__packed__)) zip_footer { + uint32_t magic; + uint16_t disk_no; + uint16_t central_disk_no; + uint16_t headers_no; + uint16_t headers_no_total; + uint32_t headers_size; + uint32_t headers_addr; + uint16_t comment_length; + uint8_t comment[]; +}; + +struct __attribute__((__packed__)) zip_central { + uint32_t magic; + uint16_t ver_used; + uint16_t ver_needed; + uint16_t flags; + uint16_t method; + struct dos_date mtime; + uint32_t checksum; + uint32_t compressed_size; + uint32_t original_size; + uint16_t filename_length; + uint16_t extra_length; + uint16_t comment_length; + uint16_t file_disk_no; + uint16_t internal_attr; + uint32_t external_attr; + uint32_t file_addr; + uint8_t filename[]; +}; + +struct __attribute__((__packed__)) zip_header { + uint32_t magic; + uint16_t ver_needed; + uint16_t flags; + uint16_t method; + struct dos_date mtime; + uint32_t checksum; + uint32_t compressed_size; + uint32_t original_size; + uint16_t filename_length; + uint16_t extra_length; + uint8_t filename[]; +}; -- cgit 1.4.1-2-gfad0