116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/*******************************************************************************
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* Ledger Ethereum App
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* (c) 2016-2019 Ledger
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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********************************************************************************/
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#include <stdint.h>
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#include <string.h>
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#include "ethUstream.h"
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#include "ethUtils.h"
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#include "uint256.h"
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#include "tokens.h"
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static const unsigned char hex_digits[] = {'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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void array_hexstr(char *strbuf, const void *bin, unsigned int len) {
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while (len--) {
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*strbuf++ = hex_digits[((*((char *)bin)) >> 4) & 0xF];
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*strbuf++ = hex_digits[(*((char *)bin)) & 0xF];
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bin = (const void *)((unsigned int)bin + 1);
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}
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*strbuf = 0; // EOS
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}
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void convertUint256BE(uint8_t *data, uint32_t length, uint256_t *target) {
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uint8_t tmp[32];
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os_memset(tmp, 0, 32);
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os_memmove(tmp + 32 - length, data, length);
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readu256BE(tmp, target);
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}
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int local_strchr(char *string, char ch) {
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unsigned int length = strlen(string);
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unsigned int i;
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for (i=0; i<length; i++) {
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if (string[i] == ch) {
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return i;
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}
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}
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return -1;
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}
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uint32_t getV(txContent_t *txContent) {
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uint32_t v = 0;
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if (txContent->vLength == 1) {
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v = txContent->v[0];
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}
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else
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if (txContent->vLength == 2) {
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v = (txContent->v[0] << 8) | txContent->v[1];
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}
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else
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if (txContent->vLength == 3) {
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v = (txContent->v[0] << 16) | (txContent->v[1] << 8) | txContent->v[2];
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}
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else
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if (txContent->vLength == 4) {
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v = (txContent->v[0] << 24) | (txContent->v[1] << 16) |
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(txContent->v[2] << 8) | txContent->v[3];
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}
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else
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if (txContent->vLength != 0) {
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PRINTF("Unexpected v format\n");
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THROW(EXCEPTION);
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}
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return v;
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}
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void amountToString(uint8_t* amount, uint8_t amount_size, uint8_t decimals, char* ticker, char* out_buffer, uint8_t out_buffer_size){
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uint256_t amount_256;
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char tmp_buffer[100];
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convertUint256BE(amount, amount_size, &amount_256);
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tostring256(&amount_256, 10, tmp_buffer, 100);
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uint8_t amount_len = strnlen(tmp_buffer, sizeof(tmp_buffer));
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uint8_t ticker_len = strnlen(ticker, MAX_TICKER_LEN);
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memcpy(out_buffer, ticker, MIN(out_buffer_size, ticker_len));
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adjustDecimals(tmp_buffer, amount_len, out_buffer + ticker_len, out_buffer_size - ticker_len -1, decimals);
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out_buffer[out_buffer_size-1] = '\0';
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}
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bool parse_swap_config(uint8_t* config, uint8_t config_len, char* ticker, uint8_t* decimals){
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uint8_t ticker_len, offset = 0;
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if (config_len == 0){
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return false;
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}
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ticker_len = config[offset++];
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if(ticker_len == 0 || ticker_len > MAX_TICKER_LEN - 2 || config_len - offset < ticker_len){
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return false;
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}
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memcpy(ticker, config+offset, ticker_len);
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offset += ticker_len;
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ticker[ticker_len] = ' ';
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ticker[ticker_len+1] = '\0';
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if(config_len - offset < 1){
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return false;
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}
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*decimals = config[offset];
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return true;
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} |