/* qr_obj_code.c * * * Copyright (C) 2015 Toxic All Rights Reserved. * * This file is part of Toxic. * * Toxic is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Toxic is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Toxic. If not, see . * */ #include #include #include #include "toxic.h" #include "windows.h" #include "qr_code.h" #define BORDER_LEN 1 #define CHAR_1 "\342\226\210" #define CHAR_2 "\342\226\204" #define CHAR_3 "\342\226\200" /* Converts a tox ID string into a QRcode and prints it to the given file stream. * * Returns 0 on success. * Returns -1 on failure. */ int ID_to_QRcode(const char *tox_id, FILE *fp) { if (fp == NULL) return -1; QRcode *qr_obj = QRcode_encodeString(tox_id, 0, QR_ECLEVEL_L, QR_MODE_8, 0); if (qr_obj == NULL) return -1; size_t width = qr_obj->width; size_t i, j; for (i = 0; i < width + BORDER_LEN * 2; ++i) fprintf(fp, "%s", CHAR_1); fprintf(fp, "\n"); for (i = 0; i < width; i += 2) { for (j = 0; j < BORDER_LEN; ++j) fprintf(fp, "%s", CHAR_1); const unsigned char *row_1 = qr_obj->data + width * i; const unsigned char *row_2 = row_1 + width; for (j = 0; j < width; ++j) { bool x = row_1[j] & 1; bool y = (i + 1) < width ? (row_2[j] & 1) : false; if (x && y) fprintf(fp, " "); else if (x) fprintf(fp, "%s", CHAR_2); else if (y) fprintf(fp, "%s", CHAR_3); else fprintf(fp, "%s", CHAR_1); } for (j = 0; j < BORDER_LEN; ++j) fprintf(fp, "%s", CHAR_1); fprintf(fp, "\n"); } QRcode_free(qr_obj); return 0; }