112 lines
No EOL
2 KiB
C
112 lines
No EOL
2 KiB
C
#ifndef LIBMINEZIPER_ZIP_H
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#define LIBMINEZIPER_ZIP_H
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#pragma pack(1)
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#define START_EOCD_SEARCH 22
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#define EOCD_SIG "PK\05\06"
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#define LFH_SIG "PK\03\04"
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#define CDH_SIG "PK\01\02"
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#define DEFLATE 8
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#define NUM_OF_CODE 26 * 2 + 10
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const char* SYMBOLS =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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typedef struct raw
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{
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char* buf;
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char* stream;
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int size;
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} raw;
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typedef struct LFH
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{
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int sig; // LFH_SIG "PK\03\04"
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short version;
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short f;
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short compression_method;
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short last_mod_time;
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short last_mod_date;
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int crc32;
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int compressed_size;
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int uncompressed_size;
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short filename_length;
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short extra_field_length;
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} LFH;
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typedef struct CDH
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{
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int sig; // CDH_SIG "PK\01\02"
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short v1;
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short v2;
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short f;
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short compression_method;
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short last_mod_time;
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short last_mod_date;
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int crc32;
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int compressed_size;
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int uncompressed_size;
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short filename_length;
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short extra_field_length;
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short file_comment_length;
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short disk_number_start;
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short internal_file_attributes;
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int external_file_attributes;
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int off_lfh;
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} CDH;
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typedef struct EOCD
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{
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int sig; // CDH_SIG "PK\05\06"
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char d[6];
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short number_of_entries;
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int size_cdh;
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int off_cdh;
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} EOCD;
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// Input stream header for DEFLATE
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typedef struct ISH
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{
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unsigned last_block : 1;
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unsigned block_type : 2;
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} ISH;
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// Dynamic Huffman Code header for DEFLATE
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typedef struct DHCH
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{
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unsigned literal_codes : 5;
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unsigned dist_codes : 5;
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unsigned bit_length_code : 4;
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} DHCH;
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typedef struct zip
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{
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// compression type
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char* cd;
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CDH** cdh;
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LFH** lfh;
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EOCD* eocd;
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} zip;
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// Huffman Node and Table
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typedef struct HN
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{
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unsigned char symbol;
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unsigned char code;
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unsigned char len;
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} HN;
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typedef struct HT
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{
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unsigned char size;
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HN* nodes;
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} HT;
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void get_eocd(raw* raw, zip* out);
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void get_cdh(raw* raw, zip* out);
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char* get_encoded_data(zip* in, int n);
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void parse_zip(char* filename, zip* out);
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void deflate(zip* in);
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#endif |