498 lines
15 KiB
C
498 lines
15 KiB
C
#include <inttypes.h>
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#include <toolbox/hex.h>
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#include <furi/check.h>
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#include "flipper_format_stream.h"
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#include "flipper_format_stream_i.h"
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static bool flipper_format_stream_write(Stream* stream, const void* data, size_t data_size) {
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size_t bytes_written = stream_write(stream, data, data_size);
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return bytes_written == data_size;
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}
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static bool flipper_format_stream_write_key(Stream* stream, const char* key) {
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bool result = false;
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do {
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if(!flipper_format_stream_write(stream, key, strlen(key))) break;
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if(!flipper_format_stream_write(stream, &flipper_format_delimiter, 1)) break;
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if(!flipper_format_stream_write(stream, " ", 1)) break;
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result = true;
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} while(false);
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return result;
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}
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bool flipper_format_stream_write_eol(Stream* stream) {
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return flipper_format_stream_write(stream, &flipper_format_eoln, 1);
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}
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static bool flipper_format_stream_read_valid_key(Stream* stream, string_t key) {
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string_reset(key);
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const size_t buffer_size = 32;
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uint8_t buffer[buffer_size];
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bool found = false;
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bool error = false;
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bool accumulate = true;
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bool new_line = true;
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while(true) {
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size_t was_read = stream_read(stream, buffer, buffer_size);
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if(was_read == 0) break;
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for(size_t i = 0; i < was_read; i++) {
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uint8_t data = buffer[i];
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if(data == flipper_format_eoln) {
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// EOL found, clean data, start accumulating data and set the new_line flag
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string_reset(key);
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accumulate = true;
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new_line = true;
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} else if(data == flipper_format_eolr) {
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// ignore
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} else if(data == flipper_format_comment && new_line) {
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// if there is a comment character and we are at the beginning of a new line
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// do not accumulate comment data and reset the new_line flag
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accumulate = false;
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new_line = false;
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} else if(data == flipper_format_delimiter) {
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if(new_line) {
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// we are on a "new line" and found the delimiter
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// this can only be if we have previously found some kind of key, so
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// clear the data, set the flag that we no longer want to accumulate data
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// and reset the new_line flag
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string_reset(key);
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accumulate = false;
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new_line = false;
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} else {
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// parse the delimiter only if we are accumulating data
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if(accumulate) {
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// we found the delimiter, move the rw pointer to the delimiter location
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// and signal that we have found something
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if(!stream_seek(stream, i - was_read, StreamOffsetFromCurrent)) {
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error = true;
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break;
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}
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found = true;
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break;
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}
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}
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} else {
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// just new symbol, reset the new_line flag
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new_line = false;
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if(accumulate) {
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// and accumulate data if we want
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string_push_back(key, data);
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}
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}
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}
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if(found || error) break;
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}
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return found;
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}
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bool flipper_format_stream_seek_to_key(Stream* stream, const char* key, bool strict_mode) {
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bool found = false;
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string_t read_key;
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string_init(read_key);
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while(!stream_eof(stream)) {
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if(flipper_format_stream_read_valid_key(stream, read_key)) {
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if(string_cmp_str(read_key, key) == 0) {
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if(!stream_seek(stream, 2, StreamOffsetFromCurrent)) break;
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found = true;
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break;
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} else if(strict_mode) {
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found = false;
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break;
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}
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}
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}
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string_clear(read_key);
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return found;
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}
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static bool flipper_format_stream_read_value(Stream* stream, string_t value, bool* last) {
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string_reset(value);
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const size_t buffer_size = 32;
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uint8_t buffer[buffer_size];
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bool result = false;
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bool error = false;
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while(true) {
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size_t was_read = stream_read(stream, buffer, buffer_size);
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if(was_read == 0) {
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// check EOF
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if(stream_eof(stream) && string_size(value) > 0) {
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result = true;
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*last = true;
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break;
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}
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}
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for(uint16_t i = 0; i < was_read; i++) {
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uint8_t data = buffer[i];
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if(data == flipper_format_eoln) {
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if(string_size(value) > 0) {
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if(!stream_seek(stream, i - was_read, StreamOffsetFromCurrent)) {
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error = true;
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break;
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}
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result = true;
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*last = true;
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break;
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} else {
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error = true;
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}
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} else if(data == ' ') {
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if(string_size(value) > 0) {
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if(!stream_seek(stream, i - was_read, StreamOffsetFromCurrent)) {
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error = true;
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break;
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}
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result = true;
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*last = false;
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break;
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}
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} else if(data == flipper_format_eolr) {
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// Ignore
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} else {
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string_push_back(value, data);
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}
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}
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if(error || result) break;
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}
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return result;
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}
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static bool flipper_format_stream_read_line(Stream* stream, string_t str_result) {
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string_reset(str_result);
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const size_t buffer_size = 32;
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uint8_t buffer[buffer_size];
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do {
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size_t was_read = stream_read(stream, buffer, buffer_size);
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if(was_read == 0) break;
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bool result = false;
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bool error = false;
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for(size_t i = 0; i < was_read; i++) {
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uint8_t data = buffer[i];
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if(data == flipper_format_eoln) {
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if(!stream_seek(stream, i - was_read, StreamOffsetFromCurrent)) {
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error = true;
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break;
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}
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result = true;
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break;
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} else if(data == flipper_format_eolr) {
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// Ignore
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} else {
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string_push_back(str_result, data);
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}
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}
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if(result || error) {
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break;
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}
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} while(true);
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return string_size(str_result) != 0;
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}
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static bool flipper_format_stream_seek_to_next_line(Stream* stream) {
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const size_t buffer_size = 32;
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uint8_t buffer[buffer_size];
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bool result = false;
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bool error = false;
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do {
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size_t was_read = stream_read(stream, buffer, buffer_size);
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if(was_read == 0) {
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if(stream_eof(stream)) {
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result = true;
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break;
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}
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}
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for(size_t i = 0; i < was_read; i++) {
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if(buffer[i] == flipper_format_eoln) {
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if(!stream_seek(stream, i - was_read, StreamOffsetFromCurrent)) {
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error = true;
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break;
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}
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result = true;
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break;
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}
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}
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if(result || error) {
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break;
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}
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} while(true);
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return result;
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}
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bool flipper_format_stream_write_value_line(Stream* stream, FlipperStreamWriteData* write_data) {
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bool result = false;
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if(write_data->type == FlipperStreamValueIgnore) {
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result = true;
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} else {
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string_t value;
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string_init(value);
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do {
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if(!flipper_format_stream_write_key(stream, write_data->key)) break;
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if(write_data->type == FlipperStreamValueStr) write_data->data_size = 1;
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bool cycle_error = false;
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for(uint16_t i = 0; i < write_data->data_size; i++) {
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switch(write_data->type) {
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case FlipperStreamValueStr: {
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const char* data = write_data->data;
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string_printf(value, "%s", data);
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}; break;
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case FlipperStreamValueHex: {
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const uint8_t* data = write_data->data;
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string_printf(value, "%02X", data[i]);
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}; break;
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case FlipperStreamValueFloat: {
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const float* data = write_data->data;
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string_printf(value, "%f", data[i]);
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}; break;
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case FlipperStreamValueInt32: {
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const int32_t* data = write_data->data;
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string_printf(value, "%" PRIi32, data[i]);
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}; break;
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case FlipperStreamValueUint32: {
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const uint32_t* data = write_data->data;
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string_printf(value, "%" PRId32, data[i]);
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}; break;
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default:
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furi_crash("Unknown FF type");
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}
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if((i + 1) < write_data->data_size) {
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string_cat(value, " ");
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}
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if(!flipper_format_stream_write(
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stream, string_get_cstr(value), string_size(value))) {
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cycle_error = true;
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break;
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}
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}
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if(cycle_error) break;
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if(!flipper_format_stream_write_eol(stream)) break;
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result = true;
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} while(false);
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string_clear(value);
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}
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return result;
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}
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bool flipper_format_stream_read_value_line(
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Stream* stream,
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const char* key,
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FlipperStreamValue type,
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void* _data,
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size_t data_size,
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bool strict_mode) {
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bool result = false;
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do {
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if(!flipper_format_stream_seek_to_key(stream, key, strict_mode)) break;
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if(type == FlipperStreamValueStr) {
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string_ptr data = (string_ptr)_data;
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if(flipper_format_stream_read_line(stream, data)) {
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result = true;
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break;
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}
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} else {
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result = true;
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string_t value;
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string_init(value);
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for(uint16_t i = 0; i < data_size; i++) {
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bool last = false;
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result = flipper_format_stream_read_value(stream, value, &last);
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if(result) {
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int scan_values = 0;
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switch(type) {
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case FlipperStreamValueHex: {
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uint8_t* data = _data;
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if(string_size(value) >= 2) {
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// sscanf "%02X" does not work here
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if(hex_chars_to_uint8(
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string_get_char(value, 0),
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string_get_char(value, 1),
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&data[i])) {
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scan_values = 1;
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}
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}
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}; break;
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case FlipperStreamValueFloat: {
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float* data = _data;
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// newlib-nano does not have sscanf for floats
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// scan_values = sscanf(string_get_cstr(value), "%f", &data[i]);
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char* end_char;
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data[i] = strtof(string_get_cstr(value), &end_char);
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if(*end_char == 0) {
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// most likely ok
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scan_values = 1;
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}
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}; break;
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case FlipperStreamValueInt32: {
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int32_t* data = _data;
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scan_values = sscanf(string_get_cstr(value), "%" PRIi32, &data[i]);
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}; break;
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case FlipperStreamValueUint32: {
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uint32_t* data = _data;
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scan_values = sscanf(string_get_cstr(value), "%" PRId32, &data[i]);
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}; break;
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default:
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furi_crash("Unknown FF type");
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}
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if(scan_values != 1) {
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result = false;
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break;
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}
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} else {
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break;
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}
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if(last && ((i + 1) != data_size)) {
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result = false;
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break;
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}
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}
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string_clear(value);
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}
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} while(false);
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return result;
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}
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bool flipper_format_stream_get_value_count(
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Stream* stream,
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const char* key,
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uint32_t* count,
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bool strict_mode) {
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bool result = false;
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bool last = false;
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string_t value;
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string_init(value);
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uint32_t position = stream_tell(stream);
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do {
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if(!flipper_format_stream_seek_to_key(stream, key, strict_mode)) break;
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*count = 0;
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result = true;
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while(true) {
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if(!flipper_format_stream_read_value(stream, value, &last)) {
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result = false;
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break;
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}
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*count = *count + 1;
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if(last) break;
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}
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} while(false);
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if(!stream_seek(stream, position, StreamOffsetFromStart)) {
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result = false;
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}
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string_clear(value);
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return result;
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}
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bool flipper_format_stream_delete_key_and_write(
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Stream* stream,
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FlipperStreamWriteData* write_data,
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bool strict_mode) {
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bool result = false;
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do {
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size_t size = stream_size(stream);
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if(size == 0) break;
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if(!stream_rewind(stream)) break;
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// find key
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if(!flipper_format_stream_seek_to_key(stream, write_data->key, strict_mode)) break;
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// get key start position
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size_t start_position = stream_tell(stream) - strlen(write_data->key);
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if(start_position >= 2) {
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start_position -= 2;
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} else {
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// something wrong
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break;
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}
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// get value end position
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if(!flipper_format_stream_seek_to_next_line(stream)) break;
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size_t end_position = stream_tell(stream);
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// newline symbol
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if(end_position < size) {
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end_position += 1;
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}
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if(!stream_seek(stream, start_position, StreamOffsetFromStart)) break;
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if(!stream_delete_and_insert(
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stream,
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end_position - start_position,
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(StreamWriteCB)flipper_format_stream_write_value_line,
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write_data))
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break;
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result = true;
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} while(false);
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return result;
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}
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bool flipper_format_stream_write_comment_cstr(Stream* stream, const char* data) {
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bool result = false;
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do {
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const char comment_buffer[2] = {flipper_format_comment, ' '};
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result = flipper_format_stream_write(stream, comment_buffer, sizeof(comment_buffer));
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if(!result) break;
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result = flipper_format_stream_write(stream, data, strlen(data));
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if(!result) break;
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result = flipper_format_stream_write_eol(stream);
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} while(false);
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return result;
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}
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