312 lines
8.3 KiB
C
312 lines
8.3 KiB
C
/*
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* This file is part of the libserialport project.
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*
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* Copyright (C) 2014 Martin Ling <martin-libserialport@earth.li>
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* Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
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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 Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (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 Lesser 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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#ifndef LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
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#define LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
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/* These MSVC-specific defines must appear before other headers.*/
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#ifdef _MSC_VER
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#define _CRT_NONSTDC_NO_DEPRECATE
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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/* These feature test macros must appear before other headers.*/
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#if defined(__linux__) || defined(__CYGWIN__)
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/* For timeradd, timersub, timercmp, realpath. */
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#define _BSD_SOURCE 1 /* for glibc < 2.19 */
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#define _DEFAULT_SOURCE 1 /* for glibc >= 2.20 */
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/* For clock_gettime and associated types. */
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#define _POSIX_C_SOURCE 199309L
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#endif
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#ifdef LIBSERIALPORT_ATBUILD
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/* If building with autoconf, include the generated config.h. */
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#include <config.h>
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#endif
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#ifdef LIBSERIALPORT_MSBUILD
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/* If building with MS tools, define necessary things that
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would otherwise appear in config.h. */
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#define SP_PRIV
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#endif
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#include "libserialport.h"
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef _WIN32
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#include <windows.h>
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#include <tchar.h>
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#include <setupapi.h>
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#include <cfgmgr32.h>
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#undef DEFINE_GUID
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#define DEFINE_GUID(name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
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static const GUID name = { l,w1,w2,{ b1,b2,b3,b4,b5,b6,b7,b8 } }
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#include <usbioctl.h>
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#include <usbiodef.h>
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/* The largest size that can be passed to WriteFile() safely
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* on any architecture. This arises from the expression:
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* PAGE_SIZE * (65535 - sizeof(MDL)) / sizeof(ULONG_PTR)
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* and this worst-case value is found on x64. */
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#define WRITEFILE_MAX_SIZE 33525760
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#else
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#include <limits.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <time.h>
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#include <poll.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#endif
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#ifdef __APPLE__
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#include <CoreFoundation/CoreFoundation.h>
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#include <IOKit/IOKitLib.h>
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#include <IOKit/serial/IOSerialKeys.h>
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#include <IOKit/serial/ioss.h>
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#include <sys/syslimits.h>
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#include <mach/mach_time.h>
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#endif
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#ifdef __linux__
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#include <dirent.h>
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/* Android only has linux/serial.h from platform 21 onwards. */
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#if !(defined(__ANDROID__) && (__ANDROID_API__ < 21))
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#include <linux/serial.h>
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#endif
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#include "linux_termios.h"
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/* TCGETX/TCSETX is not available everywhere. */
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#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_STRUCT_TERMIOX)
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#define USE_TERMIOX
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#endif
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#endif
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/* TIOCINQ/TIOCOUTQ is not available everywhere. */
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#if !defined(TIOCINQ) && defined(FIONREAD)
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#define TIOCINQ FIONREAD
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#endif
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#if !defined(TIOCOUTQ) && defined(FIONWRITE)
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#define TIOCOUTQ FIONWRITE
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#endif
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/*
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* O_CLOEXEC is not available everywhere, fallback to not setting the
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* flag on those systems.
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*/
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#ifndef _WIN32
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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#endif
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/* Non-standard baudrates are not available everywhere. */
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#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && HAVE_DECL_BOTHER
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#define USE_TERMIOS_SPEED
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#endif
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struct sp_port {
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char *name;
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char *description;
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enum sp_transport transport;
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int usb_bus;
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int usb_address;
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int usb_vid;
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int usb_pid;
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char *usb_manufacturer;
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char *usb_product;
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char *usb_serial;
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char *bluetooth_address;
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#ifdef _WIN32
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char *usb_path;
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HANDLE hdl;
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COMMTIMEOUTS timeouts;
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OVERLAPPED write_ovl;
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OVERLAPPED read_ovl;
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OVERLAPPED wait_ovl;
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DWORD events;
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BYTE *write_buf;
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DWORD write_buf_size;
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BOOL writing;
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BOOL wait_running;
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#else
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int fd;
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#endif
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};
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struct sp_port_config {
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int baudrate;
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int bits;
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enum sp_parity parity;
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int stopbits;
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enum sp_rts rts;
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enum sp_cts cts;
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enum sp_dtr dtr;
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enum sp_dsr dsr;
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enum sp_xonxoff xon_xoff;
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};
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struct port_data {
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#ifdef _WIN32
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DCB dcb;
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#else
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struct termios term;
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int controlbits;
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int termiox_supported;
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int rts_flow;
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int cts_flow;
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int dtr_flow;
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int dsr_flow;
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#endif
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};
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#ifdef _WIN32
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typedef HANDLE event_handle;
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#else
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typedef int event_handle;
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#endif
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/* Standard baud rates. */
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#ifdef _WIN32
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#define BAUD_TYPE DWORD
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#define BAUD(n) {CBR_##n, n}
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#else
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#define BAUD_TYPE speed_t
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#define BAUD(n) {B##n, n}
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#endif
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struct std_baudrate {
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BAUD_TYPE index;
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int value;
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};
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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extern void (*sp_debug_handler)(const char *format, ...);
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/* Debug output macros. */
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#define DEBUG_FMT(fmt, ...) do { \
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if (sp_debug_handler) \
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sp_debug_handler(fmt ".\n", __VA_ARGS__); \
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} while (0)
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#define DEBUG(msg) DEBUG_FMT(msg, NULL)
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#define DEBUG_ERROR(err, msg) DEBUG_FMT("%s returning " #err ": " msg, __func__)
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#define DEBUG_FAIL(msg) do { \
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char *errmsg = sp_last_error_message(); \
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DEBUG_FMT("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
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sp_free_error_message(errmsg); \
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} while (0);
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#define RETURN() do { \
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DEBUG_FMT("%s returning", __func__); \
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return; \
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} while (0)
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#define RETURN_CODE(x) do { \
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DEBUG_FMT("%s returning " #x, __func__); \
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return x; \
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} while (0)
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#define RETURN_CODEVAL(x) do { \
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switch (x) { \
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case SP_OK: RETURN_CODE(SP_OK); \
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case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
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case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
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case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
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case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
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default: RETURN_CODE(SP_ERR_FAIL); \
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} \
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} while (0)
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#define RETURN_OK() RETURN_CODE(SP_OK);
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#define RETURN_ERROR(err, msg) do { \
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DEBUG_ERROR(err, msg); \
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return err; \
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} while (0)
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#define RETURN_FAIL(msg) do { \
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DEBUG_FAIL(msg); \
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return SP_ERR_FAIL; \
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} while (0)
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#define RETURN_INT(x) do { \
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int _x = x; \
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DEBUG_FMT("%s returning %d", __func__, _x); \
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return _x; \
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} while (0)
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#define RETURN_STRING(x) do { \
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char *_x = x; \
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DEBUG_FMT("%s returning %s", __func__, _x); \
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return _x; \
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} while (0)
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#define RETURN_POINTER(x) do { \
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void *_x = x; \
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DEBUG_FMT("%s returning %p", __func__, _x); \
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return _x; \
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} while (0)
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#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
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#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
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#define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__)
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#define TRACE_VOID() DEBUG_FMT("%s() called", __func__)
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#define TRY(x) do { int retval = x; if (retval != SP_OK) RETURN_CODEVAL(retval); } while (0)
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SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname);
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/* OS-specific Helper functions. */
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SP_PRIV enum sp_return get_port_details(struct sp_port *port);
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SP_PRIV enum sp_return list_ports(struct sp_port ***list);
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/* Timing abstraction */
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struct time {
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#ifdef _WIN32
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int64_t ticks;
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#else
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struct timeval tv;
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#endif
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};
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struct timeout {
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unsigned int ms, limit_ms;
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struct time start, now, end, delta, delta_max;
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struct timeval delta_tv;
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bool calls_started, overflow;
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};
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SP_PRIV void time_get(struct time *time);
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SP_PRIV void time_set_ms(struct time *time, unsigned int ms);
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SP_PRIV void time_add(const struct time *a, const struct time *b, struct time *result);
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SP_PRIV void time_sub(const struct time *a, const struct time *b, struct time *result);
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SP_PRIV bool time_greater(const struct time *a, const struct time *b);
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SP_PRIV void time_as_timeval(const struct time *time, struct timeval *tv);
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SP_PRIV unsigned int time_as_ms(const struct time *time);
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SP_PRIV void timeout_start(struct timeout *timeout, unsigned int timeout_ms);
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SP_PRIV void timeout_limit(struct timeout *timeout, unsigned int limit_ms);
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SP_PRIV bool timeout_check(struct timeout *timeout);
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SP_PRIV void timeout_update(struct timeout *timeout);
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SP_PRIV struct timeval *timeout_timeval(struct timeout *timeout);
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SP_PRIV unsigned int timeout_remaining_ms(struct timeout *timeout);
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#endif
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