133 lines
4.6 KiB
C
133 lines
4.6 KiB
C
#ifndef RC_HASH_H
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#define RC_HASH_H
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#include <stddef.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "rc_consoles.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* ===================================================== */
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/* generates a hash from a block of memory.
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* returns non-zero on success, or zero on failure.
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*/
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int rc_hash_generate_from_buffer(char hash[33], int console_id, uint8_t* buffer, size_t buffer_size);
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/* generates a hash from a file.
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* returns non-zero on success, or zero on failure.
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*/
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int rc_hash_generate_from_file(char hash[33], int console_id, const char* path);
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/* ===================================================== */
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/* data for rc_hash_iterate
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*/
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struct rc_hash_iterator
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{
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uint8_t* buffer;
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size_t buffer_size;
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uint8_t consoles[12];
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int index;
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const char* path;
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};
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/* initializes a rc_hash_iterator
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* - path must be provided
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* - if buffer and buffer_size are provided, path may be a filename (i.e. for something extracted from a zip file)
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*/
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void rc_hash_initialize_iterator(struct rc_hash_iterator* iterator, const char* path, uint8_t* buffer, size_t buffer_size);
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/* releases resources associated to a rc_hash_iterator
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*/
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void rc_hash_destroy_iterator(struct rc_hash_iterator* iterator);
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/* generates the next hash for the data in the rc_hash_iterator.
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* returns non-zero if a hash was generated, or zero if no more hashes can be generated for the data.
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*/
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int rc_hash_iterate(char hash[33], struct rc_hash_iterator* iterator);
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/* ===================================================== */
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/* specifies a function to call when an error occurs to display the error message */
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typedef void (*rc_hash_message_callback)(const char*);
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void rc_hash_init_error_message_callback(rc_hash_message_callback callback);
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/* specifies a function to call for verbose logging */
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void rc_hash_init_verbose_message_callback(rc_hash_message_callback callback);
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/* ===================================================== */
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/* opens a file */
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typedef void* (*rc_hash_filereader_open_file_handler)(const char* path_utf8);
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/* moves the file pointer - standard fseek parameters */
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typedef void (*rc_hash_filereader_seek_handler)(void* file_handle, size_t offset, int origin);
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/* locates the file pointer */
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typedef size_t (*rc_hash_filereader_tell_handler)(void* file_handle);
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/* reads the specified number of bytes from the file starting at the read pointer.
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* returns the number of bytes actually read.
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*/
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typedef size_t (*rc_hash_filereader_read_handler)(void* file_handle, void* buffer, size_t requested_bytes);
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/* closes the file */
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typedef void (*rc_hash_filereader_close_file_handler)(void* file_handle);
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struct rc_hash_filereader
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{
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rc_hash_filereader_open_file_handler open;
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rc_hash_filereader_seek_handler seek;
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rc_hash_filereader_tell_handler tell;
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rc_hash_filereader_read_handler read;
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rc_hash_filereader_close_file_handler close;
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};
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void rc_hash_init_custom_filereader(struct rc_hash_filereader* reader);
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/* ===================================================== */
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#define RC_HASH_CDTRACK_FIRST_DATA ((uint32_t)-1)
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#define RC_HASH_CDTRACK_LAST ((uint32_t)-2)
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#define RC_HASH_CDTRACK_LARGEST ((uint32_t)-3)
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/* opens a track from the specified file. track 0 indicates the largest data track should be opened.
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* returns a handle to be passed to the other functions, or NULL if the track could not be opened.
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*/
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typedef void* (*rc_hash_cdreader_open_track_handler)(const char* path, uint32_t track);
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/* attempts to read the specified number of bytes from the file starting at the read pointer.
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* returns the number of bytes actually read.
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*/
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typedef size_t (*rc_hash_cdreader_read_sector_handler)(void* track_handle, uint32_t sector, void* buffer, size_t requested_bytes);
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/* closes the track handle */
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typedef void (*rc_hash_cdreader_close_track_handler)(void* track_handle);
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/* convert absolute sector to track sector */
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typedef uint32_t(*rc_hash_cdreader_absolute_sector_to_track_sector)(void* track_handle, uint32_t sector);
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struct rc_hash_cdreader
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{
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rc_hash_cdreader_open_track_handler open_track;
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rc_hash_cdreader_read_sector_handler read_sector;
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rc_hash_cdreader_close_track_handler close_track;
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rc_hash_cdreader_absolute_sector_to_track_sector absolute_sector_to_track_sector;
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};
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void rc_hash_init_default_cdreader();
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void rc_hash_init_custom_cdreader(struct rc_hash_cdreader* reader);
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/* ===================================================== */
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#ifdef __cplusplus
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}
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#endif
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#endif /* RC_HASH_H */
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