mirror of
https://github.com/RaySollium99/picodrive.git
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144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
#ifndef __UNZIP_H
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#define __UNZIP_H
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// notaz: something's missing this
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#ifndef UINT16
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#define UINT32 unsigned int
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#define UINT16 unsigned short
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#define UINT8 unsigned char
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#endif
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/***************************************************************************
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* Support for retrieving files from zipfiles
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***************************************************************************/
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struct zipent {
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UINT32 cent_file_header_sig;
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UINT8 version_made_by;
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UINT8 host_os;
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UINT8 version_needed_to_extract;
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UINT8 os_needed_to_extract;
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UINT16 general_purpose_bit_flag;
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UINT16 compression_method;
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UINT16 last_mod_file_time;
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UINT16 last_mod_file_date;
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UINT32 crc32;
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UINT32 compressed_size;
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UINT32 uncompressed_size;
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UINT16 filename_length;
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UINT16 extra_field_length;
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UINT16 file_comment_length;
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UINT16 disk_number_start;
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UINT16 internal_file_attrib;
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UINT32 external_file_attrib;
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UINT32 offset_lcl_hdr_frm_frst_disk;
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char* name; /* 0 terminated */
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};
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typedef struct _ZIP {
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char* zip; /* zip name */
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FILE* fp; /* zip handler */
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long length; /* length of zip file */
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char* ecd; /* end_of_cent_dir data */
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unsigned ecd_length; /* end_of_cent_dir length */
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char* cd; /* cent_dir data */
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unsigned cd_pos; /* position in cent_dir */
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struct zipent ent; /* buffer for readzip */
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/* end_of_cent_dir */
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UINT32 end_of_cent_dir_sig;
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UINT16 number_of_this_disk;
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UINT16 number_of_disk_start_cent_dir;
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UINT16 total_entries_cent_dir_this_disk;
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UINT16 total_entries_cent_dir;
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UINT32 size_of_cent_dir;
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UINT32 offset_to_start_of_cent_dir;
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UINT16 zipfile_comment_length;
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char* zipfile_comment; /* pointer in ecd */
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} ZIP;
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/* Opens a zip stream for reading
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return:
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!=0 success, zip stream
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==0 error
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*/
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ZIP* openzip(const char* path);
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/* Closes a zip stream */
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void closezip(ZIP* zip);
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/* Reads the current entry from a zip stream
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in:
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zip opened zip
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return:
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!=0 success
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==0 error
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*/
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struct zipent* readzip(ZIP* zip);
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/* Suspend access to a zip file (release file handler)
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in:
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zip opened zip
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note:
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A suspended zip is automatically reopened at first call of
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readuncompressd() or readcompressed() functions
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*/
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void suspendzip(ZIP* zip);
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/* Resets a zip stream to the first entry
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in:
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zip opened zip
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note:
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ZIP file must be opened and not suspended
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*/
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void rewindzip(ZIP* zip);
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/* Read compressed data from a zip entry
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in:
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zip opened zip
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ent entry to read
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out:
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data buffer for data, ent.compressed_size UINT8s allocated by the caller
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return:
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==0 success
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<0 error
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*/
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int readcompresszip(ZIP* zip, struct zipent* ent, char* data);
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/* Read decompressed data from a zip entry
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in:
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zip zip stream open
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ent entry to read
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out:
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data buffer for data, ent.uncompressed_size UINT8s allocated by the caller
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return:
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==0 success
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<0 error
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*/
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int readuncompresszip(ZIP* zip, struct zipent* ent, char* data);
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/* public functions */
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int /* error */ load_zipped_file (const char *zipfile, const char *filename,
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unsigned char **buf, unsigned int *length);
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int /* error */ checksum_zipped_file (const char *zipfile, const char *filename, unsigned int *length, unsigned int *sum);
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void unzip_cache_clear(void);
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/* public globals */
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extern int gUnzipQuiet; /* flag controls error messages */
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#ifdef __cplusplus
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}
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#endif
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#endif
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