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99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/*
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* This file is part of the libmmpp project.
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* Copyright 2019 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef TTY_PROCS_H__
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#define TTY_PROCS_H__
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#include <limits.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <termios.h> // tcsetattr, baudrates
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// tty Rx static buffer
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#define TBUFLEN (1024)
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// read timeout (in seconds)
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#define TTYTIMEOUT (0.05)
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// unused arguments of functions
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#define _U_ __attribute__((__unused__))
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// break absent in `case`
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#define FALLTHRU __attribute__ ((fallthrough))
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// and synonym for FALLTHRU
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#define NOBREAKHERE __attribute__ ((fallthrough))
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// weak functions
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#define WEAK __attribute__ ((weak))
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#define COLOR_RED "\033[1;31;40m"
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#define COLOR_GREEN "\033[1;32;40m"
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#define COLOR_OLD "\033[0;0;0m"
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/*
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* print function name, debug messages
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* debug mode, -DEBUG
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*/
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#ifdef EBUG
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#define FNAME() do{ fprintf(stderr, COLOR_OLD); \
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fprintf(stderr, "\n%s (%s, line %d)\n", __func__, __FILE__, __LINE__);} while(0)
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#define DBG(...) do{ fprintf(stderr, COLOR_OLD); \
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fprintf(stderr, "%s (%s, line %d): ", __func__, __FILE__, __LINE__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n");} while(0)
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#else
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#define FNAME() do{}while(0)
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#define DBG(...) do{}while(0)
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#endif //EBUG
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/*
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* Memory allocation
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*/
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#define ALLOC(type, var, size) type * var = ((type *)my_alloc(size, sizeof(type)))
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#define MALLOC(type, size) ((type *)my_alloc(size, sizeof(type)))
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#define FREE(ptr) do{if(ptr){free(ptr); ptr = NULL;}}while(0)
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#ifndef DBL_EPSILON
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#define DBL_EPSILON (2.2204460492503131e-16)
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#endif
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typedef struct {
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char *portname; // device filename (should be freed before structure freeing)
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int speed; // baudrate in human-readable format
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tcflag_t baudrate; // baudrate (B...)
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struct termios oldtty; // TTY flags for previous port settings
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struct termios tty; // TTY flags for current settings
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int comfd; // TTY file descriptor
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char *buf; // buffer for data read
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size_t bufsz; // size of buf
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size_t buflen; // length of data read into buf
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bool exclusive; // should device be exclusive opened
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} TTYdescr;
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void *my_alloc(size_t N, size_t S);
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int str2double(double *num, const char *str);
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double dtime();
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TTYdescr *new_tty(char *comdev, int speed, size_t bufsz);
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int tty_init(TTYdescr *descr);
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TTYdescr *tty_open(TTYdescr *d, bool exclusive);
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size_t read_tty(TTYdescr *d);
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int write_tty(int comfd, const char *buff, size_t length);
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void close_tty(TTYdescr **descr);
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int handshake();
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char *keyval(char *key, char *haystack);
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char *cpy2buf(char *string, size_t *l);
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#endif // TTY_PROCS_H__
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