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flipperzero-firmware/lib/flipper_format/flipper_format.h
SG 274c12fc56
[FL-2274] Inventing streams and moving FFF to them (#981) 
* Streams: string stream
* String stream: updated insert/delete api
* Streams: generic stream interface and string stream implementation
* Streams: helpers for insert and delete_and_insert
* FFF: now compatible with streams
* MinUnit: introduced tests with arguments
* FFF: stream access violation
* Streams: copy data between streams
* Streams: file stream
* FFF: documentation
* FFStream: documentation
* FFF: alloc as file
* MinUnit: support for nested tests
* Streams: changed delete_and_insert, now it returns success flag. Added ability dump stream inner parameters and data to cout.
* FFF: simplified file open function
* Streams: unit tests
* FFF: tests
* Streams: declare cache_size constant as define, to allow variable modified arrays
* FFF: lib moved to a separate folder
* iButton: new FFF
* RFID: new FFF
* Animations: new FFF
* IR: new FFF
* NFC: new FFF
* Flipper file format: delete lib
* U2F: new FFF
* Subghz: new FFF and streams
* Streams: read line
* Streams: split
* FuriCore: implement memset with extra asserts
* FuriCore: implement extra heap asserts without inventing memset
* Scene manager: protected access to the scene id stack with a size check
* NFC worker: dirty fix for issue where hal_nfc was busy on app start
* Furi: update allocator to erase memory on allocation. Replace furi_alloc with malloc.
* FuriCore: cleanup memmgr code.
* Furi HAL: furi_hal_init is split into critical and non-critical parts. The critical part is currently clock and console.
* Memmgr: added ability to track allocations and deallocations through console.
* FFStream: some speedup
* Streams, FF: minor fixes
* Tests: restore
* File stream: a slightly more thread-safe version of file_stream_delete_and_insert

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
2022-02-18 22:53:46 +03:00

471 lines
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/**
* @file flipper_format.h
* Flipper File Format helper library.
*
* Flipper File Format is a fairly simple format for storing data in a file.
*
* Flipper file structure:
*
* ~~~~~~~~~~~~~~~~~~~~~
* # Commentary
* Field name: field value
* ~~~~~~~~~~~~~~~~~~~~~
*
* Lines starting with the # character are ignored (considered as comments). The separator between the name of the value and the value itself is the string ": ".
*
* Currently supported types:
*
* ~~~~~~~~~~~~~~~~~~~~~
* String: text
* Int32: 1 2 -3 4
* Uint32: 1 2 3 4
* Float: 1.0 1234.654
* Hex: A4 B3 C2 D1 12 FF
* ~~~~~~~~~~~~~~~~~~~~~
*
* End of line is LF when writing, but CR is supported when reading.
*
* The library is designed in such a way that comments and field values are completely ignored when searching for keys, that is, they do not consume memory.
*
* File example:
*
* ~~~~~~~~~~~~~~~~~~~~~
* Filetype: Flipper Test File
* Version: 1
* # Just test file
* String: String value
* UINT: 1234
* Hex: 00 01 FF A3
* ~~~~~~~~~~~~~~~~~~~~~
*
* Writing:
*
* ~~~~~~~~~~~~~~~~~~~~~
* FlipperFormat format = flipper_format_file_alloc(storage);
*
* do {
* const uint32_t version = 1;
* const char* string_value = "String value";
* const uint32_t uint32_value = 1234;
* const uint16_t array_size = 4;
* const uint8_t* array[array_size] = {0x00, 0x01, 0xFF, 0xA3};
*
* if(!flipper_format_file_open_new(format, "/ext/flipper_format_test")) break;
* if(!flipper_format_write_header_cstr(format, "Flipper Test File", version)) break;
* if(!flipper_format_write_comment_cstr(format, "Just test file")) break;
* if(!flipper_format_write_string_cstr(format, "String", string_value)) break;
* if(!flipper_format_write_uint32(format, "UINT", &uint32_value, 1)) break;
* if(!flipper_format_write_hex(format, "Hex Array", array, array_size)) break;
*
* // signal that the file was written successfully
* } while(0);
*
* flipper_format_free(file);
* ~~~~~~~~~~~~~~~~~~~~~
*
* Reading:
*
* ~~~~~~~~~~~~~~~~~~~~~
* FlipperFormat file = flipper_format_file_alloc(storage);
*
* do {
* uint32_t version = 1;
* string_t file_type;
* string_t string_value;
* uint32_t uint32_value = 1;
* uint16_t array_size = 4;
* uint8_t* array[array_size] = {0};
* string_init(file_type);
* string_init(string_value);
*
* if(!flipper_format_file_open_existing(file, "/ext/flipper_format_test")) break;
* if(!flipper_format_read_header(file, file_type, &version)) break;
* if(!flipper_format_read_string(file, "String", string_value)) break;
* if(!flipper_format_read_uint32(file, "UINT", &uint32_value, 1)) break;
* if(!flipper_format_read_hex(file, "Hex Array", array, array_size)) break;
*
* // signal that the file was read successfully
* } while(0);
*
* flipper_format_free(file);
* ~~~~~~~~~~~~~~~~~~~~~
*
*/
#pragma once
#include <stdint.h>
#include <mlib/m-string.h>
#include <storage/storage.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct FlipperFormat FlipperFormat;
/**
* Allocate FlipperFormat as string.
* @return FlipperFormat* pointer to a FlipperFormat instance
*/
FlipperFormat* flipper_format_string_alloc();
/**
* Allocate FlipperFormat as file.
* @return FlipperFormat* pointer to a FlipperFormat instance
*/
FlipperFormat* flipper_format_file_alloc(Storage* storage);
/**
* Open existing file.
* Use only if FlipperFormat allocated as a file.
* @param flipper_format Pointer to a FlipperFormat instance
* @param path File path
* @return True on success
*/
bool flipper_format_file_open_existing(FlipperFormat* flipper_format, const char* path);
/**
* Open existing file for writing and add values to the end of file.
* Use only if FlipperFormat allocated as a file.
* @param flipper_format Pointer to a FlipperFormat instance
* @param path File path
* @return True on success
*/
bool flipper_format_file_open_append(FlipperFormat* flipper_format, const char* path);
/**
* Open file. Creates a new file, or deletes the contents of the file if it already exists.
* Use only if FlipperFormat allocated as a file.
* @param flipper_format Pointer to a FlipperFormat instance
* @param path File path
* @return True on success
*/
bool flipper_format_file_open_always(FlipperFormat* flipper_format, const char* path);
/**
* Open file. Creates a new file, fails if file already exists.
* Use only if FlipperFormat allocated as a file.
* @param flipper_format Pointer to a FlipperFormat instance
* @param path File path
* @return True on success
*/
bool flipper_format_file_open_new(FlipperFormat* flipper_format, const char* path);
/**
* Closes the file, use only if FlipperFormat allocated as a file.
* @param flipper_format
* @return true
* @return false
*/
bool flipper_format_file_close(FlipperFormat* flipper_format);
/**
* Free FlipperFormat.
* @param flipper_format Pointer to a FlipperFormat instance
*/
void flipper_format_free(FlipperFormat* flipper_format);
/**
* Set FlipperFormat mode.
* @param flipper_format Pointer to a FlipperFormat instance
* @param strict_mode True obligates not to skip valid fields. False by default.
*/
void flipper_format_set_strict_mode(FlipperFormat* flipper_format, bool strict_mode);
/**
* Rewind the RW pointer.
* @param flipper_format Pointer to a FlipperFormat instance
* @return True on success
*/
bool flipper_format_rewind(FlipperFormat* flipper_format);
/**
* Read the header (file type and version).
* @param flipper_format Pointer to a FlipperFormat instance
* @param filetype File type string
* @param version Version Value
* @return True on success
*/
bool flipper_format_read_header(
FlipperFormat* flipper_format,
string_t filetype,
uint32_t* version);
/**
* Write the header (file type and version).
* @param flipper_format Pointer to a FlipperFormat instance
* @param filetype File type string
* @param version Version Value
* @return True on success
*/
bool flipper_format_write_header(
FlipperFormat* flipper_format,
string_t filetype,
const uint32_t version);
/**
* Write the header (file type and version). Plain C string version.
* @param flipper_format Pointer to a FlipperFormat instance
* @param filetype File type string
* @param version Version Value
* @return True on success
*/
bool flipper_format_write_header_cstr(
FlipperFormat* flipper_format,
const char* filetype,
const uint32_t version);
/**
* Get the count of values by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key
* @param count
* @return bool
*/
bool flipper_format_get_value_count(
FlipperFormat* flipper_format,
const char* key,
uint32_t* count);
/**
* Read a string by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_read_string(FlipperFormat* flipper_format, const char* key, string_t data);
/**
* Write key and string
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_write_string(FlipperFormat* flipper_format, const char* key, string_t data);
/**
* Write key and string. Plain C string version.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_write_string_cstr(
FlipperFormat* flipper_format,
const char* key,
const char* data);
/**
* Read array of uint32 by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_read_uint32(
FlipperFormat* flipper_format,
const char* key,
uint32_t* data,
const uint16_t data_size);
/**
* Write key and array of uint32
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_write_uint32(
FlipperFormat* flipper_format,
const char* key,
const uint32_t* data,
const uint16_t data_size);
/**
* Read array of int32 by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_read_int32(
FlipperFormat* flipper_format,
const char* key,
int32_t* data,
const uint16_t data_size);
/**
* Write key and array of int32
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_write_int32(
FlipperFormat* flipper_format,
const char* key,
const int32_t* data,
const uint16_t data_size);
/**
* Read array of float by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_read_float(
FlipperFormat* flipper_format,
const char* key,
float* data,
const uint16_t data_size);
/**
* Write key and array of float
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_write_float(
FlipperFormat* flipper_format,
const char* key,
const float* data,
const uint16_t data_size);
/**
* Read array of hex-formatted bytes by key
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_read_hex(
FlipperFormat* flipper_format,
const char* key,
uint8_t* data,
const uint16_t data_size);
/**
* Write key and array of hex-formatted bytes
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @param data_size Values count
* @return True on success
*/
bool flipper_format_write_hex(
FlipperFormat* flipper_format,
const char* key,
const uint8_t* data,
const uint16_t data_size);
/**
* Write comment
* @param flipper_format Pointer to a FlipperFormat instance
* @param data Comment text
* @return True on success
*/
bool flipper_format_write_comment(FlipperFormat* flipper_format, string_t data);
/**
* Write comment. Plain C string version.
* @param flipper_format Pointer to a FlipperFormat instance
* @param data Comment text
* @return True on success
*/
bool flipper_format_write_comment_cstr(FlipperFormat* flipper_format, const char* data);
/**
* Removes the first matching key and its value. Sets the RW pointer to a position of deleted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @return True on success
*/
bool flipper_format_delete_key(FlipperFormat* flipper_format, const char* key);
/**
* Updates the value of the first matching key to a string value. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_string(FlipperFormat* flipper_format, const char* key, string_t data);
/**
* Updates the value of the first matching key to a string value. Plain C version. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_string_cstr(
FlipperFormat* flipper_format,
const char* key,
const char* data);
/**
* Updates the value of the first matching key to a uint32 array value. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_uint32(
FlipperFormat* flipper_format,
const char* key,
const uint32_t* data,
const uint16_t data_size);
/**
* Updates the value of the first matching key to a int32 array value. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_int32(
FlipperFormat* flipper_format,
const char* key,
const int32_t* data,
const uint16_t data_size);
/**
* Updates the value of the first matching key to a float array value. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_float(
FlipperFormat* flipper_format,
const char* key,
const float* data,
const uint16_t data_size);
/**
* Updates the value of the first matching key to an array of hex-formatted bytes. Sets the RW pointer to a position at the end of inserted data.
* @param flipper_format Pointer to a FlipperFormat instance
* @param key Key
* @param data Value
* @return True on success
*/
bool flipper_format_update_hex(
FlipperFormat* flipper_format,
const char* key,
const uint8_t* data,
const uint16_t data_size);
#ifdef __cplusplus
}
#endif
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