mirror of
https://github.com/kevinbentley/Descent3.git
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135 lines
3.2 KiB
C++
135 lines
3.2 KiB
C++
/*
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* $Logfile: /DescentIII/Main/Lib/unzip.h $
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* $Revision: 3 $
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* $Date: 8/15/99 8:07p $
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* $Author: Jeff $
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*
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* Unzip class
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*
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* $Log: /DescentIII/Main/Lib/unzip.h $
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*
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* 3 8/15/99 8:07p Jeff
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* handle disk write errors when extracting
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*
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* 2 8/13/99 8:01p Jeff
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* initial creation of zip class
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*
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* $NoKeywords: $
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*/
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#ifndef __UNZIP_H
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#define __UNZIP_H
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#include <stdio.h>
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#include "pstypes.h"
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typedef struct
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{
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uint cent_file_header_sig;
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ubyte version_made_by;
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ubyte host_os;
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ubyte version_needed_to_extract;
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ubyte os_needed_to_extract;
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ushort general_purpose_bit_flag;
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ushort compression_method;
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ushort last_mod_file_time;
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ushort last_mod_file_date;
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uint crc32;
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uint compressed_size;
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uint uncompressed_size;
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ushort filename_length;
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ushort extra_field_length;
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ushort file_comment_length;
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ushort disk_number_start;
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ushort internal_file_attrib;
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uint external_file_attrib;
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uint offset_lcl_hdr_frm_frst_disk;
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char* name;
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}zipentry;
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class ZIP
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{
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public:
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//constructor/destructor
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ZIP();
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~ZIP();
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public:
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//opens a zip file for reading
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//returns true on success
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bool OpenZip(const char *path);
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//closes an open zip file
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void CloseZip(void);
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// Reads the current zip entry from the zip file (and moves
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// to the next entry). Returns NULL if there are no more entries
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zipentry* ReadNextZipEntry(void);
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// Resets a ZIP file to the first entry
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void Rewind(void);
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// Reads a file from the given zip entry into a buffer in memory
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// -1 : no ZIP file open
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// -2 : corrupt file
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// -3 : Version too new
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// -4 : OS not supported
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// -5 : No Disk Spanning
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// -6 : Error inflating
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// -7 : Compression Type Not Supported
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int ReadFile(zipentry *ent,char *data);
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// Extracts a file from the given zip entry into another file
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// -1 : no ZIP file open
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// -2 : corrupt file
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// -3 : Version too new
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// -4 : OS not supported
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// -5 : No Disk Spanning
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// -6 : Error inflating
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// -7 : Compression Type Not Supported
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// -8 : Unable to open output
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// -9 : Error writing to file
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int ExtractFile(zipentry *ent,const char *filename);
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private:
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bool FindECDSignature(char *buffer,int buflen,int *offset);
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int ReadECD(void);
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int ReadZipData(zipentry* ent,char* data);
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int ReadZipDataToFile(zipentry* ent,FILE *file);
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int SeekToCompressedData(zipentry* ent);
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int InflateFile(FILE* in_file,unsigned in_size,ubyte* out_data,unsigned out_size);
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int InflateFileToFile(FILE* in_file,unsigned in_size,FILE *file,unsigned out_size);
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private:
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bool m_open;
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char* m_zip; // zip name
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FILE* m_fp; // zip handler
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long m_length; // length of zip file
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char* m_ecd; // end_of_cent_dir data
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unsigned m_ecd_length;// end_of_cent_dir length
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char* m_cd; // cent_dir data
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unsigned m_cd_pos; // position in cent_dir
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zipentry m_ent; // buffer for readzip
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// end_of_cent_dir
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uint m_end_of_cent_dir_sig;
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ushort m_number_of_this_disk;
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ushort m_number_of_disk_start_cent_dir;
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ushort m_total_entries_cent_dir_this_disk;
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ushort m_total_entries_cent_dir;
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uint m_size_of_cent_dir;
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uint m_offset_to_start_of_cent_dir;
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ushort m_zipfile_comment_length;
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char* m_zipfile_comment; // pointer in ecd
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};
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// Compare two filename without using directory
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int CompareZipFileName(const char* zipfile, const char* file);
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#endif
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