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#pragma once
#include <stdint.h>
#include <stddef.h>
#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[];
};
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