libserialport.h.in

   1 /*
   2  * This file is part of the libserialport project.
   3  *
   4  * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Lesser General Public License as
   8  * published by the Free Software Foundation, either version 3 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /**
  21  * @mainpage libserialport API
  22  *
  23  * Introduction
  24  * ============
  25  *
  26  * libserialport is a minimal library written in C that is intended to take
  27  * care of the OS-specific details when writing software that uses serial ports.
  28  *
  29  * By writing your serial code to use libserialport, you enable it to work
  30  * transparently on any platform supported by the library.
  31  *
  32  * The operations that are supported are:
  33  *
  34  * - @ref Enumeration (obtaining a list of serial ports on the system)
  35  * - @ref Ports
  36  * - @ref Configuration (baud rate, parity, etc.)
  37  * - @ref Signals (modem control lines, breaks, etc.)
  38  * - @ref Data
  39  * - @ref Waiting
  40  * - @ref Errors
  41  *
  42  * libserialport is an open source project released under the LGPL3+ license.
  43  *
  44  * API principles
  45  * ==============
  46  *
  47  * The API is simple, and designed to be a minimal wrapper around the serial
  48  * port support in each OS.
  49  *
  50  * Most functions take a pointer to a struct sp_port, which represents a serial
  51  * port. These structures are always allocated and freed by the library, using
  52  * the functions in the @ref Enumeration "Enumeration" section.
  53  *
  54  * Most functions have return type @ref sp_return and can return only four
  55  * possible error values:
  56  *
  57  * - @ref SP_ERR_ARG means that a function was called with invalid
  58  *   arguments. This implies a bug in the caller. The arguments passed would
  59  *   be invalid regardless of the underlying OS or serial device involved.
  60  *
  61  * - @ref SP_ERR_FAIL means that the OS reported a failure. The error code or
  62  *   message provided by the OS can be obtained by calling sp_last_error_code()
  63  *   or sp_last_error_message().
  64  *
  65  * - @ref SP_ERR_SUPP indicates that there is no support for the requested
  66  *   operation in the current OS, driver or device. No error message is
  67  *   available from the OS in this case. There is either no way to request
  68  *   the operation in the first place, or libserialport does not know how to
  69  *   do so in the current version.
  70  *
  71  * - @ref SP_ERR_MEM indicates that a memory allocation failed.
  72  *
  73  * All of these error values are negative.
  74  *
  75  * Calls that succeed return @ref SP_OK, which is equal to zero. Some functions
  76  * declared @ref sp_return can also return a positive value for a successful
  77  * numeric result, e.g. sp_blocking_read() or sp_blocking_write().
  78  */
  79
  80 #ifndef LIBSERIALPORT_LIBSERIALPORT_H
  81 #define LIBSERIALPORT_LIBSERIALPORT_H
  82
  83 #ifdef __cplusplus
  84 extern "C" {
  85 #endif
  86
  87 #include <stddef.h>
  88 #ifdef _WIN32
  89 #include <windows.h>
  90 #endif
  91
  92 /** Return values. */
  93 enum sp_return {
  94         /** Operation completed successfully. */
  95         SP_OK = 0,
  96         /** Invalid arguments were passed to the function. */
  97         SP_ERR_ARG = -1,
  98         /** A system error occurred while executing the operation. */
  99         SP_ERR_FAIL = -2,
 100         /** A memory allocation failed while executing the operation. */
 101         SP_ERR_MEM = -3,
 102         /** The requested operation is not supported by this system or device. */
 103         SP_ERR_SUPP = -4
 104 };
 105
 106 /** Port access modes. */
 107 enum sp_mode {
 108         /** Open port for read access. */
 109         SP_MODE_READ = 1,
 110         /** Open port for write access. */
 111         SP_MODE_WRITE = 2,
 112         /** Open port for read and write access. */
 113         SP_MODE_READ_WRITE = 3
 114 };
 115
 116 /** Port events. */
 117 enum sp_event {
 118         /** Data received and ready to read. */
 119         SP_EVENT_RX_READY = 1,
 120         /** Ready to transmit new data. */
 121         SP_EVENT_TX_READY = 2,
 122         /** Error occurred. */
 123         SP_EVENT_ERROR = 4
 124 };
 125
 126 /** Buffer selection. */
 127 enum sp_buffer {
 128         /** Input buffer. */
 129         SP_BUF_INPUT = 1,
 130         /** Output buffer. */
 131         SP_BUF_OUTPUT = 2,
 132         /** Both buffers. */
 133         SP_BUF_BOTH = 3
 134 };
 135
 136 /** Parity settings. */
 137 enum sp_parity {
 138         /** Special value to indicate setting should be left alone. */
 139         SP_PARITY_INVALID = -1,
 140         /** No parity. */
 141         SP_PARITY_NONE = 0,
 142         /** Odd parity. */
 143         SP_PARITY_ODD = 1,
 144         /** Even parity. */
 145         SP_PARITY_EVEN = 2,
 146         /** Mark parity. */
 147         SP_PARITY_MARK = 3,
 148         /** Space parity. */
 149         SP_PARITY_SPACE = 4
 150 };
 151
 152 /** RTS pin behaviour. */
 153 enum sp_rts {
 154         /** Special value to indicate setting should be left alone. */
 155         SP_RTS_INVALID = -1,
 156         /** RTS off. */
 157         SP_RTS_OFF = 0,
 158         /** RTS on. */
 159         SP_RTS_ON = 1,
 160         /** RTS used for flow control. */
 161         SP_RTS_FLOW_CONTROL = 2
 162 };
 163
 164 /** CTS pin behaviour. */
 165 enum sp_cts {
 166         /** Special value to indicate setting should be left alone. */
 167         SP_CTS_INVALID = -1,
 168         /** CTS ignored. */
 169         SP_CTS_IGNORE = 0,
 170         /** CTS used for flow control. */
 171         SP_CTS_FLOW_CONTROL = 1
 172 };
 173
 174 /** DTR pin behaviour. */
 175 enum sp_dtr {
 176         /** Special value to indicate setting should be left alone. */
 177         SP_DTR_INVALID = -1,
 178         /** DTR off. */
 179         SP_DTR_OFF = 0,
 180         /** DTR on. */
 181         SP_DTR_ON = 1,
 182         /** DTR used for flow control. */
 183         SP_DTR_FLOW_CONTROL = 2
 184 };
 185
 186 /** DSR pin behaviour. */
 187 enum sp_dsr {
 188         /** Special value to indicate setting should be left alone. */
 189         SP_DSR_INVALID = -1,
 190         /** DSR ignored. */
 191         SP_DSR_IGNORE = 0,
 192         /** DSR used for flow control. */
 193         SP_DSR_FLOW_CONTROL = 1
 194 };
 195
 196 /** XON/XOFF flow control behaviour. */
 197 enum sp_xonxoff {
 198         /** Special value to indicate setting should be left alone. */
 199         SP_XONXOFF_INVALID = -1,
 200         /** XON/XOFF disabled. */
 201         SP_XONXOFF_DISABLED = 0,
 202         /** XON/XOFF enabled for input only. */
 203         SP_XONXOFF_IN = 1,
 204         /** XON/XOFF enabled for output only. */
 205         SP_XONXOFF_OUT = 2,
 206         /** XON/XOFF enabled for input and output. */
 207         SP_XONXOFF_INOUT = 3
 208 };
 209
 210 /** Standard flow control combinations. */
 211 enum sp_flowcontrol {
 212         /** No flow control. */
 213         SP_FLOWCONTROL_NONE = 0,
 214         /** Software flow control using XON/XOFF characters. */
 215         SP_FLOWCONTROL_XONXOFF = 1,
 216         /** Hardware flow control using RTS/CTS signals. */
 217         SP_FLOWCONTROL_RTSCTS = 2,
 218         /** Hardware flow control using DTR/DSR signals. */
 219         SP_FLOWCONTROL_DTRDSR = 3
 220 };
 221
 222 /** Input signals. */
 223 enum sp_signal {
 224         /** Clear to send. */
 225         SP_SIG_CTS = 1,
 226         /** Data set ready. */
 227         SP_SIG_DSR = 2,
 228         /** Data carrier detect. */
 229         SP_SIG_DCD = 4,
 230         /** Ring indicator. */
 231         SP_SIG_RI = 8
 232 };
 233
 234 /** Transport types. */
 235 enum sp_transport {
 236         /** Native platform serial port. */
 237         SP_TRANSPORT_NATIVE,
 238         /** USB serial port adapter. */
 239         SP_TRANSPORT_USB,
 240         /** Bluetooth serial port adapter. */
 241         SP_TRANSPORT_BLUETOOTH
 242 };
 243
 244 /**
 245  * @struct sp_port
 246  * An opaque structure representing a serial port.
 247  */
 248 struct sp_port;
 249
 250 /**
 251  * @struct sp_port_config
 252  * An opaque structure representing the configuration for a serial port.
 253  */
 254 struct sp_port_config;
 255
 256 /**
 257  * @struct sp_event_set
 258  * A set of handles to wait on for events.
 259  */
 260 struct sp_event_set {
 261         /** Array of OS-specific handles. */
 262         void *handles;
 263         /** Array of bitmasks indicating which events apply for each handle. */
 264         enum sp_event *masks;
 265         /** Number of handles. */
 266         unsigned int count;
 267 };
 268
 269 /**
 270  * @defgroup Enumeration Port enumeration
 271  *
 272  * Enumerating the serial ports of a system.
 273  *
 274  * @{
 275  */
 276
 277 /**
 278  * Obtain a pointer to a new sp_port structure representing the named port.
 279  *
 280  * The user should allocate a variable of type "struct sp_port *" and pass a
 281  * pointer to this to receive the result.
 282  *
 283  * The result should be freed after use by calling sp_free_port().
 284  *
 285  * If any error is returned, the variable pointed to by port_ptr will be set
 286  * to NULL. Otherwise, it will be set to point to the newly allocated port.
 287  *
 288  * @return SP_OK upon success, a negative error code otherwise.
 289  *
 290  * @since 0.1.0
 291  */
 292 enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr);
 293
 294 /**
 295  * Free a port structure obtained from sp_get_port_by_name() or sp_copy_port().
 296  *
 297  * @since 0.1.0
 298  */
 299 void sp_free_port(struct sp_port *port);
 300
 301 /**
 302  * List the serial ports available on the system.
 303  *
 304  * The result obtained is an array of pointers to sp_port structures,
 305  * terminated by a NULL. The user should allocate a variable of type
 306  * "struct sp_port **" and pass a pointer to this to receive the result.
 307  *
 308  * The result should be freed after use by calling sp_free_port_list().
 309  * If a port from the list is to be used after freeing the list, it must be
 310  * copied first using sp_copy_port().
 311  *
 312  * If any error is returned, the variable pointed to by list_ptr will be set
 313  * to NULL. Otherwise, it will be set to point to the newly allocated array.
 314  *
 315  * @return SP_OK upon success, a negative error code otherwise.
 316  *
 317  * @since 0.1.0
 318  */
 319 enum sp_return sp_list_ports(struct sp_port ***list_ptr);
 320
 321 /**
 322  * Make a new copy of a sp_port structure.
 323  *
 324  * The user should allocate a variable of type "struct sp_port *" and pass a
 325  * pointer to this to receive the result.
 326  *
 327  * The copy should be freed after use by calling sp_free_port().
 328  *
 329  * If any error is returned, the variable pointed to by copy_ptr will be set
 330  * to NULL. Otherwise, it will be set to point to the newly allocated copy.
 331  *
 332  * @return SP_OK upon success, a negative error code otherwise.
 333  *
 334  * @since 0.1.0
 335  */
 336 enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr);
 337
 338 /**
 339  * Free a port list obtained from sp_list_ports().
 340  *
 341  * This will also free all the sp_port structures referred to from the list;
 342  * any that are to be retained must be copied first using sp_copy_port().
 343  *
 344  * @since 0.1.0
 345  */
 346 void sp_free_port_list(struct sp_port **ports);
 347
 348 /**
 349  * @}
 350  * @defgroup Ports Port handling
 351  *
 352  * Opening, closing and querying ports.
 353  *
 354  * @{
 355  */
 356
 357 /**
 358  * Open the specified serial port.
 359  *
 360  * @param port Pointer to port structure.
 361  * @param flags Flags to use when opening the serial port.
 362  *
 363  * @return SP_OK upon success, a negative error code otherwise.
 364  *
 365  * @since 0.1.0
 366  */
 367 enum sp_return sp_open(struct sp_port *port, enum sp_mode flags);
 368
 369 /**
 370  * Close the specified serial port.
 371  *
 372  * @return SP_OK upon success, a negative error code otherwise.
 373  *
 374  * @since 0.1.0
 375  */
 376 enum sp_return sp_close(struct sp_port *port);
 377
 378 /**
 379  * Get the name of a port.
 380  *
 381  * The name returned is whatever is normally used to refer to a port on the
 382  * current operating system; e.g. for Windows it will usually be a "COMn"
 383  * device name, and for Unix it will be a device path beginning with "/dev/".
 384  *
 385  * @param port Pointer to port structure.
 386  *
 387  * @return The port name, or NULL if an invalid port is passed. The name
 388  * string is part of the port structure and may not be used after the
 389  * port structure has been freed.
 390  *
 391  * @since 0.1.0
 392  */
 393 char *sp_get_port_name(const struct sp_port *port);
 394
 395 /**
 396  * Get a description for a port, to present to end user.
 397  *
 398  * @param port Pointer to port structure.
 399  *
 400  * @return The port description, or NULL if an invalid port is passed.
 401  * The description string is part of the port structure and may not be used
 402  * after the port structure has been freed.
 403  *
 404  * @since 0.2.0
 405  */
 406 char *sp_get_port_description(struct sp_port *port);
 407
 408 /**
 409  * Get the transport type used by a port.
 410  *
 411  * @param port Pointer to port structure.
 412  *
 413  * @return The port transport type.
 414  *
 415  * @since 0.2.0
 416  */
 417 enum sp_transport sp_get_port_transport(struct sp_port *port);
 418
 419 /**
 420  * Get the USB bus number and address on bus of a USB serial adapter port.
 421  *
 422  * @param port Pointer to port structure.
 423  * @param usb_bus Pointer to variable to store USB bus.
 424  * @param usb_address Pointer to variable to store USB address
 425  *
 426  * @return SP_OK upon success, a negative error code otherwise.
 427  *
 428  * @since 0.2.0
 429  */
 430 enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
 431                                            int *usb_bus, int *usb_address);
 432
 433 /**
 434  * Get the USB Vendor ID and Product ID of a USB serial adapter port.
 435  *
 436  * @param port Pointer to port structure.
 437  * @param usb_vid Pointer to variable to store USB VID.
 438  * @param usb_pid Pointer to variable to store USB PID
 439  *
 440  * @return SP_OK upon success, a negative error code otherwise.
 441  *
 442  * @since 0.2.0
 443  */
 444 enum sp_return sp_get_port_usb_vid_pid(const struct sp_port *port, int *usb_vid, int *usb_pid);
 445
 446 /**
 447  * Get the USB manufacturer string of a USB serial adapter port.
 448  *
 449  * @param port Pointer to port structure.
 450  *
 451  * @return The port manufacturer string, or NULL if an invalid port is passed.
 452  * The manufacturer string is part of the port structure and may not be used
 453  * after the port structure has been freed.
 454  *
 455  * @since 0.2.0
 456  */
 457 char *sp_get_port_usb_manufacturer(const struct sp_port *port);
 458
 459 /**
 460  * Get the USB product string of a USB serial adapter port.
 461  *
 462  * @param port Pointer to port structure.
 463  *
 464  * @return The port product string, or NULL if an invalid port is passed.
 465  * The product string is part of the port structure and may not be used
 466  * after the port structure has been freed.
 467  *
 468  * @since 0.2.0
 469  */
 470 char *sp_get_port_usb_product(const struct sp_port *port);
 471
 472 /**
 473  * Get the USB serial number string of a USB serial adapter port.
 474  *
 475  * @param port Pointer to port structure.
 476  *
 477  * @return The port serial number, or NULL if an invalid port is passed.
 478  * The serial number string is part of the port structure and may not be used
 479  * after the port structure has been freed.
 480  *
 481  * @since 0.2.0
 482  */
 483 char *sp_get_port_usb_serial(const struct sp_port *port);
 484
 485 /**
 486  * Get the MAC address of a Bluetooth serial adapter port.
 487  *
 488  * @param port Pointer to port structure.
 489  *
 490  * @return The port MAC address, or NULL if an invalid port is passed.
 491  * The MAC address string is part of the port structure and may not be used
 492  * after the port structure has been freed.
 493  *
 494  * @since 0.2.0
 495  */
 496 char *sp_get_port_bluetooth_address(const struct sp_port *port);
 497
 498 /**
 499  * Get the operating system handle for a port.
 500  *
 501  * The type of the handle depends on the operating system. On Unix based
 502  * systems, the handle is a file descriptor of type "int". On Windows, the
 503  * handle is of type "HANDLE". The user should allocate a variable of the
 504  * appropriate type and pass a pointer to this to receive the result.
 505  *
 506  * To obtain a valid handle, the port must first be opened by calling
 507  * sp_open() using the same port structure.
 508  *
 509  * After the port is closed or the port structure freed, the handle may
 510  * no longer be valid.
 511  *
 512  * @warning This feature is provided so that programs may make use of
 513  *          OS-specific functionality where desired. Doing so obviously
 514  *          comes at a cost in portability. It also cannot be guaranteed
 515  *          that direct usage of the OS handle will not conflict with the
 516  *          library's own usage of the port. Be careful.
 517  *
 518  * @return SP_OK upon success, a negative error code otherwise.
 519  *
 520  * @since 0.1.0
 521  */
 522 enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr);
 523
 524 /**
 525  * @}
 526  *
 527  * @defgroup Configuration Configuration
 528  *
 529  * Setting and querying serial port parameters.
 530  * @{
 531  */
 532
 533 /**
 534  * Allocate a port configuration structure.
 535  *
 536  * The user should allocate a variable of type "struct sp_config *" and pass a
 537  * pointer to this to receive the result. The variable will be updated to
 538  * point to the new configuration structure. The structure is opaque and must
 539  * be accessed via the functions provided.
 540  *
 541  * All parameters in the structure will be initialised to special values which
 542  * are ignored by sp_set_config().
 543  *
 544  * The structure should be freed after use by calling sp_free_config().
 545  *
 546  * @param config_ptr Pointer to variable to receive result.
 547  *
 548  * @return SP_OK upon success, a negative error code otherwise.
 549  *
 550  * @since 0.1.0
 551  */
 552 enum sp_return sp_new_config(struct sp_port_config **config_ptr);
 553
 554 /**
 555  * Free a port configuration structure.
 556  *
 557  * @param config Pointer to configuration structure.
 558  *
 559  * @since 0.1.0
 560  */
 561 void sp_free_config(struct sp_port_config *config);
 562
 563 /**
 564  * Get the current configuration of the specified serial port.
 565  *
 566  * The user should allocate a configuration structure using sp_new_config()
 567  * and pass this as the config parameter. The configuration structure will
 568  * be updated with the port configuration.
 569  *
 570  * Any parameters that are configured with settings not recognised or
 571  * supported by libserialport, will be set to special values that are
 572  * ignored by sp_set_config().
 573  *
 574  * @return SP_OK upon success, a negative error code otherwise.
 575  *
 576  * @since 0.1.0
 577  */
 578 enum sp_return sp_get_config(struct sp_port *port, struct sp_port_config *config);
 579
 580 /**
 581  * Set the configuration for the specified serial port.
 582  *
 583  * For each parameter in the configuration, there is a special value (usually
 584  * -1, but see the documentation for each field). These values will be ignored
 585  * and the corresponding setting left unchanged on the port.
 586  *
 587  * @return SP_OK upon success, a negative error code otherwise.
 588  *
 589  * @since 0.1.0
 590  */
 591 enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config);
 592
 593 /**
 594  * Set the baud rate for the specified serial port.
 595  *
 596  * @param port Pointer to port structure.
 597  * @param baudrate Baud rate in bits per second.
 598  *
 599  * @return SP_OK upon success, a negative error code otherwise.
 600  *
 601  * @since 0.1.0
 602  */
 603 enum sp_return sp_set_baudrate(struct sp_port *port, int baudrate);
 604
 605 /**
 606  * Get the baud rate from a port configuration.
 607  *
 608  * The user should allocate a variable of type int and pass a pointer to this
 609  * to receive the result.
 610  *
 611  * @param config Pointer to configuration structure.
 612  * @param baudrate_ptr Pointer to variable to store result.
 613  *
 614  * @return SP_OK upon success, a negative error code otherwise.
 615  *
 616  * @since 0.1.0
 617  */
 618 enum sp_return sp_get_config_baudrate(const struct sp_port_config *config, int *baudrate_ptr);
 619
 620 /**
 621  * Set the baud rate in a port configuration.
 622  *
 623  * @param config Pointer to configuration structure.
 624  * @param baudrate Baud rate in bits per second, or -1 to retain current setting.
 625  *
 626  * @return SP_OK upon success, a negative error code otherwise.
 627  *
 628  * @since 0.1.0
 629  */
 630 enum sp_return sp_set_config_baudrate(struct sp_port_config *config, int baudrate);
 631
 632 /**
 633  * Set the data bits for the specified serial port.
 634  *
 635  * @param port Pointer to port structure.
 636  * @param bits Number of data bits.
 637  *
 638  * @return SP_OK upon success, a negative error code otherwise.
 639  *
 640  * @since 0.1.0
 641  */
 642 enum sp_return sp_set_bits(struct sp_port *port, int bits);
 643
 644 /**
 645  * Get the data bits from a port configuration.
 646  *
 647  * The user should allocate a variable of type int and pass a pointer to this
 648  * to receive the result.
 649  *
 650  * @param config Pointer to configuration structure.
 651  * @param bits_ptr Pointer to variable to store result.
 652  *
 653  * @return SP_OK upon success, a negative error code otherwise.
 654  *
 655  * @since 0.1.0
 656  */
 657 enum sp_return sp_get_config_bits(const struct sp_port_config *config, int *bits_ptr);
 658
 659 /**
 660  * Set the data bits in a port configuration.
 661  *
 662  * @param config Pointer to configuration structure.
 663  * @param bits Number of data bits, or -1 to retain current setting.
 664  *
 665  * @return SP_OK upon success, a negative error code otherwise.
 666  *
 667  * @since 0.1.0
 668  */
 669 enum sp_return sp_set_config_bits(struct sp_port_config *config, int bits);
 670
 671 /**
 672  * Set the parity setting for the specified serial port.
 673  *
 674  * @param port Pointer to port structure.
 675  * @param parity Parity setting.
 676  *
 677  * @return SP_OK upon success, a negative error code otherwise.
 678  *
 679  * @since 0.1.0
 680  */
 681 enum sp_return sp_set_parity(struct sp_port *port, enum sp_parity parity);
 682
 683 /**
 684  * Get the parity setting from a port configuration.
 685  *
 686  * The user should allocate a variable of type enum sp_parity and pass a pointer to this
 687  * to receive the result.
 688  *
 689  * @param config Pointer to configuration structure.
 690  * @param parity_ptr Pointer to variable to store result.
 691  *
 692  * @return SP_OK upon success, a negative error code otherwise.
 693  *
 694  * @since 0.1.0
 695  */
 696 enum sp_return sp_get_config_parity(const struct sp_port_config *config, enum sp_parity *parity_ptr);
 697
 698 /**
 699  * Set the parity setting in a port configuration.
 700  *
 701  * @param config Pointer to configuration structure.
 702  * @param parity Parity setting, or -1 to retain current setting.
 703  *
 704  * @return SP_OK upon success, a negative error code otherwise.
 705  *
 706  * @since 0.1.0
 707  */
 708 enum sp_return sp_set_config_parity(struct sp_port_config *config, enum sp_parity parity);
 709
 710 /**
 711  * Set the stop bits for the specified serial port.
 712  *
 713  * @param port Pointer to port structure.
 714  * @param stopbits Number of stop bits.
 715  *
 716  * @return SP_OK upon success, a negative error code otherwise.
 717  *
 718  * @since 0.1.0
 719  */
 720 enum sp_return sp_set_stopbits(struct sp_port *port, int stopbits);
 721
 722 /**
 723  * Get the stop bits from a port configuration.
 724  *
 725  * The user should allocate a variable of type int and pass a pointer to this
 726  * to receive the result.
 727  *
 728  * @param config Pointer to configuration structure.
 729  * @param stopbits_ptr Pointer to variable to store result.
 730  *
 731  * @return SP_OK upon success, a negative error code otherwise.
 732  *
 733  * @since 0.1.0
 734  */
 735 enum sp_return sp_get_config_stopbits(const struct sp_port_config *config, int *stopbits_ptr);
 736
 737 /**
 738  * Set the stop bits in a port configuration.
 739  *
 740  * @param config Pointer to configuration structure.
 741  * @param stopbits Number of stop bits, or -1 to retain current setting.
 742  *
 743  * @return SP_OK upon success, a negative error code otherwise.
 744  *
 745  * @since 0.1.0
 746  */
 747 enum sp_return sp_set_config_stopbits(struct sp_port_config *config, int stopbits);
 748
 749 /**
 750  * Set the RTS pin behaviour for the specified serial port.
 751  *
 752  * @param port Pointer to port structure.
 753  * @param rts RTS pin mode.
 754  *
 755  * @return SP_OK upon success, a negative error code otherwise.
 756  *
 757  * @since 0.1.0
 758  */
 759 enum sp_return sp_set_rts(struct sp_port *port, enum sp_rts rts);
 760
 761 /**
 762  * Get the RTS pin behaviour from a port configuration.
 763  *
 764  * The user should allocate a variable of type enum sp_rts and pass a pointer to this
 765  * to receive the result.
 766  *
 767  * @param config Pointer to configuration structure.
 768  * @param rts_ptr Pointer to variable to store result.
 769  *
 770  * @return SP_OK upon success, a negative error code otherwise.
 771  *
 772  * @since 0.1.0
 773  */
 774 enum sp_return sp_get_config_rts(const struct sp_port_config *config, enum sp_rts *rts_ptr);
 775
 776 /**
 777  * Set the RTS pin behaviour in a port configuration.
 778  *
 779  * @param config Pointer to configuration structure.
 780  * @param rts RTS pin mode, or -1 to retain current setting.
 781  *
 782  * @return SP_OK upon success, a negative error code otherwise.
 783  *
 784  * @since 0.1.0
 785  */
 786 enum sp_return sp_set_config_rts(struct sp_port_config *config, enum sp_rts rts);
 787
 788 /**
 789  * Set the CTS pin behaviour for the specified serial port.
 790  *
 791  * @param port Pointer to port structure.
 792  * @param cts CTS pin mode.
 793  *
 794  * @return SP_OK upon success, a negative error code otherwise.
 795  *
 796  * @since 0.1.0
 797  */
 798 enum sp_return sp_set_cts(struct sp_port *port, enum sp_cts cts);
 799
 800 /**
 801  * Get the CTS pin behaviour from a port configuration.
 802  *
 803  * The user should allocate a variable of type enum sp_cts and pass a pointer to this
 804  * to receive the result.
 805  *
 806  * @param config Pointer to configuration structure.
 807  * @param cts_ptr Pointer to variable to store result.
 808  *
 809  * @return SP_OK upon success, a negative error code otherwise.
 810  *
 811  * @since 0.1.0
 812  */
 813 enum sp_return sp_get_config_cts(const struct sp_port_config *config, enum sp_cts *cts_ptr);
 814
 815 /**
 816  * Set the CTS pin behaviour in a port configuration.
 817  *
 818  * @param config Pointer to configuration structure.
 819  * @param cts CTS pin mode, or -1 to retain current setting.
 820  *
 821  * @return SP_OK upon success, a negative error code otherwise.
 822  *
 823  * @since 0.1.0
 824  */
 825 enum sp_return sp_set_config_cts(struct sp_port_config *config, enum sp_cts cts);
 826
 827 /**
 828  * Set the DTR pin behaviour for the specified serial port.
 829  *
 830  * @param port Pointer to port structure.
 831  * @param dtr DTR pin mode.
 832  *
 833  * @return SP_OK upon success, a negative error code otherwise.
 834  *
 835  * @since 0.1.0
 836  */
 837 enum sp_return sp_set_dtr(struct sp_port *port, enum sp_dtr dtr);
 838
 839 /**
 840  * Get the DTR pin behaviour from a port configuration.
 841  *
 842  * The user should allocate a variable of type enum sp_dtr and pass a pointer to this
 843  * to receive the result.
 844  *
 845  * @param config Pointer to configuration structure.
 846  * @param dtr_ptr Pointer to variable to store result.
 847  *
 848  * @return SP_OK upon success, a negative error code otherwise.
 849  *
 850  * @since 0.1.0
 851  */
 852 enum sp_return sp_get_config_dtr(const struct sp_port_config *config, enum sp_dtr *dtr_ptr);
 853
 854 /**
 855  * Set the DTR pin behaviour in a port configuration.
 856  *
 857  * @param config Pointer to configuration structure.
 858  * @param dtr DTR pin mode, or -1 to retain current setting.
 859  *
 860  * @return SP_OK upon success, a negative error code otherwise.
 861  *
 862  * @since 0.1.0
 863  */
 864 enum sp_return sp_set_config_dtr(struct sp_port_config *config, enum sp_dtr dtr);
 865
 866 /**
 867  * Set the DSR pin behaviour for the specified serial port.
 868  *
 869  * @param port Pointer to port structure.
 870  * @param dsr DSR pin mode.
 871  *
 872  * @return SP_OK upon success, a negative error code otherwise.
 873  *
 874  * @since 0.1.0
 875  */
 876 enum sp_return sp_set_dsr(struct sp_port *port, enum sp_dsr dsr);
 877
 878 /**
 879  * Get the DSR pin behaviour from a port configuration.
 880  *
 881  * The user should allocate a variable of type enum sp_dsr and pass a pointer to this
 882  * to receive the result.
 883  *
 884  * @param config Pointer to configuration structure.
 885  * @param dsr_ptr Pointer to variable to store result.
 886  *
 887  * @return SP_OK upon success, a negative error code otherwise.
 888  *
 889  * @since 0.1.0
 890  */
 891 enum sp_return sp_get_config_dsr(const struct sp_port_config *config, enum sp_dsr *dsr_ptr);
 892
 893 /**
 894  * Set the DSR pin behaviour in a port configuration.
 895  *
 896  * @param config Pointer to configuration structure.
 897  * @param dsr DSR pin mode, or -1 to retain current setting.
 898  *
 899  * @return SP_OK upon success, a negative error code otherwise.
 900  *
 901  * @since 0.1.0
 902  */
 903 enum sp_return sp_set_config_dsr(struct sp_port_config *config, enum sp_dsr dsr);
 904
 905 /**
 906  * Set the XON/XOFF configuration for the specified serial port.
 907  *
 908  * @param port Pointer to port structure.
 909  * @param xon_xoff XON/XOFF mode.
 910  *
 911  * @return SP_OK upon success, a negative error code otherwise.
 912  *
 913  * @since 0.1.0
 914  */
 915 enum sp_return sp_set_xon_xoff(struct sp_port *port, enum sp_xonxoff xon_xoff);
 916
 917 /**
 918  * Get the XON/XOFF configuration from a port configuration.
 919  *
 920  * The user should allocate a variable of type enum sp_xonxoff and pass a pointer to this
 921  * to receive the result.
 922  *
 923  * @param config Pointer to configuration structure.
 924  * @param xon_xoff_ptr Pointer to variable to store result.
 925  *
 926  * @return SP_OK upon success, a negative error code otherwise.
 927  *
 928  * @since 0.1.0
 929  */
 930 enum sp_return sp_get_config_xon_xoff(const struct sp_port_config *config, enum sp_xonxoff *xon_xoff_ptr);
 931
 932 /**
 933  * Set the XON/XOFF configuration in a port configuration.
 934  *
 935  * @param config Pointer to configuration structure.
 936  * @param xon_xoff XON/XOFF mode, or -1 to retain current setting.
 937  *
 938  * @return SP_OK upon success, a negative error code otherwise.
 939  *
 940  * @since 0.1.0
 941  */
 942 enum sp_return sp_set_config_xon_xoff(struct sp_port_config *config, enum sp_xonxoff xon_xoff);
 943
 944 /**
 945  * Set the flow control type in a port configuration.
 946  *
 947  * This function is a wrapper that sets the RTS, CTS, DTR, DSR and
 948  * XON/XOFF settings as necessary for the specified flow control
 949  * type. For more fine-grained control of these settings, use their
 950  * individual configuration functions.
 951  *
 952  * @param config Pointer to configuration structure.
 953  * @param flowcontrol Flow control setting to use.
 954  *
 955  * @return SP_OK upon success, a negative error code otherwise.
 956  *
 957  * @since 0.1.0
 958  */
 959 enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, enum sp_flowcontrol flowcontrol);
 960
 961 /**
 962  * Set the flow control type for the specified serial port.
 963  *
 964  * This function is a wrapper that sets the RTS, CTS, DTR, DSR and
 965  * XON/XOFF settings as necessary for the specified flow control
 966  * type. For more fine-grained control of these settings, use their
 967  * individual configuration functions.
 968  *
 969  * @param port Pointer to port structure.
 970  * @param flowcontrol Flow control setting to use.
 971  *
 972  * @return SP_OK upon success, a negative error code otherwise.
 973  *
 974  * @since 0.1.0
 975  */
 976 enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol);
 977
 978 /**
 979  * @}
 980  *
 981  * @defgroup Data Data handling
 982  *
 983  * Reading, writing, and flushing data.
 984  *
 985  * @{
 986  */
 987
 988 /**
 989  * Read bytes from the specified serial port, blocking until complete.
 990  *
 991  * @warning If your program runs on Unix, defines its own signal handlers, and
 992  *          needs to abort blocking reads when these are called, then you
 993  *          should not use this function. It repeats system calls that return
 994  *          with EINTR. To be able to abort a read from a signal handler, you
 995  *          should implement your own blocking read using sp_nonblocking_read()
 996  *          together with a blocking method that makes sense for your program.
 997  *          E.g. you can obtain the file descriptor for an open port using
 998  *          sp_get_port_handle() and use this to call select() or pselect(),
 999  *          with appropriate arrangements to return if a signal is received.
1000  *
1001  * @param port Pointer to port structure.
1002  * @param buf Buffer in which to store the bytes read.
1003  * @param count Requested number of bytes to read.
1004  * @param timeout Timeout in milliseconds, or zero to wait indefinitely.
1005  *
1006  * @return The number of bytes read on success, or a negative error code. If
1007  *         the number of bytes returned is less than that requested, the
1008  *         timeout was reached before the requested number of bytes was
1009  *         available. If timeout is zero, the function will always return
1010  *         either the requested number of bytes or a negative error code.
1011  *
1012  * @since 0.1.0
1013  */
1014 enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout);
1015
1016 /**
1017  * Read bytes from the specified serial port, without blocking.
1018  *
1019  * @param port Pointer to port structure.
1020  * @param buf Buffer in which to store the bytes read.
1021  * @param count Maximum number of bytes to read.
1022  *
1023  * @return The number of bytes read on success, or a negative error code. The
1024  *         number of bytes returned may be any number from zero to the maximum
1025  *         that was requested.
1026  *
1027  * @since 0.1.0
1028  */
1029 enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count);
1030
1031 /**
1032  * Write bytes to the specified serial port, blocking until complete.
1033  *
1034  * Note that this function only ensures that the accepted bytes have been
1035  * written to the OS; they may be held in driver or hardware buffers and not
1036  * yet physically transmitted. To check whether all written bytes have actually
1037  * been transmitted, use the sp_output_waiting() function. To wait until all
1038  * written bytes have actually been transmitted, use the sp_drain() function.
1039  *
1040  * @warning If your program runs on Unix, defines its own signal handlers, and
1041  *          needs to abort blocking writes when these are called, then you
1042  *          should not use this function. It repeats system calls that return
1043  *          with EINTR. To be able to abort a write from a signal handler, you
1044  *          should implement your own blocking write using sp_nonblocking_write()
1045  *          together with a blocking method that makes sense for your program.
1046  *          E.g. you can obtain the file descriptor for an open port using
1047  *          sp_get_port_handle() and use this to call select() or pselect(),
1048  *          with appropriate arrangements to return if a signal is received.
1049  *
1050  * @param port Pointer to port structure.
1051  * @param buf Buffer containing the bytes to write.
1052  * @param count Requested number of bytes to write.
1053  * @param timeout Timeout in milliseconds, or zero to wait indefinitely.
1054  *
1055  * @return The number of bytes written on success, or a negative error code.
1056  *         If the number of bytes returned is less than that requested, the
1057  *         timeout was reached before the requested number of bytes was
1058  *         written. If timeout is zero, the function will always return
1059  *         either the requested number of bytes or a negative error code. In
1060  *         the event of an error there is no way to determine how many bytes
1061  *         were sent before the error occurred.
1062  *
1063  * @since 0.1.0
1064  */
1065 enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout);
1066
1067 /**
1068  * Write bytes to the specified serial port, without blocking.
1069  *
1070  * Note that this function only ensures that the accepted bytes have been
1071  * written to the OS; they may be held in driver or hardware buffers and not
1072  * yet physically transmitted. To check whether all written bytes have actually
1073  * been transmitted, use the sp_output_waiting() function. To wait until all
1074  * written bytes have actually been transmitted, use the sp_drain() function.
1075  *
1076  * @param port Pointer to port structure.
1077  * @param buf Buffer containing the bytes to write.
1078  * @param count Maximum number of bytes to write.
1079  *
1080  * @return The number of bytes written on success, or a negative error code.
1081  *         The number of bytes returned may be any number from zero to the
1082  *         maximum that was requested.
1083  *
1084  * @since 0.1.0
1085  */
1086 enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count);
1087
1088 /**
1089  * Gets the number of bytes waiting in the input buffer.
1090  *
1091  * @param port Pointer to port structure.
1092  *
1093  * @return Number of bytes waiting on success, a negative error code otherwise.
1094  *
1095  * @since 0.1.0
1096  */
1097 enum sp_return sp_input_waiting(struct sp_port *port);
1098
1099 /**
1100  * Gets the number of bytes waiting in the output buffer.
1101  *
1102  * @param port Pointer to port structure.
1103  *
1104  * @return Number of bytes waiting on success, a negative error code otherwise.
1105  *
1106  * @since 0.1.0
1107  */
1108 enum sp_return sp_output_waiting(struct sp_port *port);
1109
1110 /**
1111  * Flush serial port buffers. Data in the selected buffer(s) is discarded.
1112  *
1113  * @param port Pointer to port structure.
1114  * @param buffers Which buffer(s) to flush.
1115  *
1116  * @return SP_OK upon success, a negative error code otherwise.
1117  *
1118  * @since 0.1.0
1119  */
1120 enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers);
1121
1122 /**
1123  * Wait for buffered data to be transmitted.
1124  *
1125  * @warning If your program runs on Unix, defines its own signal handlers, and
1126  *          needs to abort draining the output buffer when when these are
1127  *          called, then you should not use this function. It repeats system
1128  *          calls that return with EINTR. To be able to abort a drain from a
1129  *          signal handler, you would need to implement your own blocking
1130  *          drain by polling the result of sp_output_waiting().
1131  *
1132  * @param port Pointer to port structure.
1133  *
1134  * @return SP_OK upon success, a negative error code otherwise.
1135  *
1136  * @since 0.1.0
1137  */
1138 enum sp_return sp_drain(struct sp_port *port);
1139
1140 /**
1141  * @}
1142  *
1143  * @defgroup Waiting Waiting
1144  *
1145  * Waiting for events and timeout handling.
1146  *
1147  * @{
1148  */
1149
1150 /**
1151  * Allocate storage for a set of events.
1152  *
1153  * The user should allocate a variable of type struct sp_event_set *,
1154  * then pass a pointer to this variable to receive the result.
1155  *
1156  * The result should be freed after use by calling sp_free_event_set().
1157  *
1158  * @return SP_OK upon success, a negative error code otherwise.
1159  *
1160  * @since 0.1.0
1161  */
1162 enum sp_return sp_new_event_set(struct sp_event_set **result_ptr);
1163
1164 /**
1165  * Add events to a struct sp_event_set for a given port.
1166  *
1167  * The port must first be opened by calling sp_open() using the same port
1168  * structure.
1169  *
1170  * After the port is closed or the port structure freed, the results may
1171  * no longer be valid.
1172  *
1173  * @param event_set Event set to update.
1174  * @param port Pointer to port structure.
1175  * @param mask Bitmask of events to be waited for.
1176  *
1177  * @return SP_OK upon success, a negative error code otherwise.
1178  *
1179  * @since 0.1.0
1180  */
1181 enum sp_return sp_add_port_events(struct sp_event_set *event_set,
1182         const struct sp_port *port, enum sp_event mask);
1183
1184 /**
1185  * Wait for any of a set of events to occur.
1186  *
1187  * @param event_set Event set to wait on.
1188  * @param timeout Timeout in milliseconds, or zero to wait indefinitely.
1189  *
1190  * @return SP_OK upon success, a negative error code otherwise.
1191  *
1192  * @since 0.1.0
1193  */
1194 enum sp_return sp_wait(struct sp_event_set *event_set, unsigned int timeout);
1195
1196 /**
1197  * Free a structure allocated by sp_new_event_set().
1198  *
1199  * @since 0.1.0
1200  */
1201 void sp_free_event_set(struct sp_event_set *event_set);
1202
1203 /**
1204  * @}
1205  *
1206  * @defgroup Signals Signals
1207  *
1208  * Port signalling operations.
1209  *
1210  * @{
1211  */
1212
1213 /**
1214  * Gets the status of the control signals for the specified port.
1215  *
1216  * The user should allocate a variable of type "enum sp_signal" and pass a
1217  * pointer to this variable to receive the result. The result is a bitmask
1218  * in which individual signals can be checked by bitwise OR with values of
1219  * the sp_signal enum.
1220  *
1221  * @param port Pointer to port structure.
1222  * @param signal_mask Pointer to variable to receive result.
1223  *
1224  * @return SP_OK upon success, a negative error code otherwise.
1225  *
1226  * @since 0.1.0
1227  */
1228 enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signal_mask);
1229
1230 /**
1231  * Put the port transmit line into the break state.
1232  *
1233  * @param port Pointer to port structure.
1234  *
1235  * @return SP_OK upon success, a negative error code otherwise.
1236  *
1237  * @since 0.1.0
1238  */
1239 enum sp_return sp_start_break(struct sp_port *port);
1240
1241 /**
1242  * Take the port transmit line out of the break state.
1243  *
1244  * @param port Pointer to port structure.
1245  *
1246  * @return SP_OK upon success, a negative error code otherwise.
1247  *
1248  * @since 0.1.0
1249  */
1250 enum sp_return sp_end_break(struct sp_port *port);
1251
1252 /**
1253  * @}
1254  *
1255  * @defgroup Errors Errors
1256  *
1257  * Obtaining error information.
1258  *
1259  * @{
1260  */
1261
1262 /**
1263  * Get the error code for a failed operation.
1264  *
1265  * In order to obtain the correct result, this function should be called
1266  * straight after the failure, before executing any other system operations.
1267  *
1268  * @return The system's numeric code for the error that caused the last
1269  *         operation to fail.
1270  *
1271  * @since 0.1.0
1272  */
1273 int sp_last_error_code(void);
1274
1275 /**
1276  * Get the error message for a failed operation.
1277  *
1278  * In order to obtain the correct result, this function should be called
1279  * straight after the failure, before executing other system operations.
1280  *
1281  * @return The system's message for the error that caused the last
1282  *         operation to fail. This string may be allocated by the function,
1283  *         and should be freed after use by calling sp_free_error_message().
1284  *
1285  * @since 0.1.0
1286  */
1287 char *sp_last_error_message(void);
1288
1289 /**
1290  * Free an error message returned by sp_last_error_message().
1291  *
1292  * @since 0.1.0
1293  */
1294 void sp_free_error_message(char *message);
1295
1296 /**
1297  * Set the handler function for library debugging messages.
1298  *
1299  * Debugging messages are generated by the library during each operation,
1300  * to help in diagnosing problems. The handler will be called for each
1301  * message. The handler can be set to NULL to ignore all debug messages.
1302  *
1303  * The handler function should accept a format string and variable length
1304  * argument list, in the same manner as e.g. printf().
1305  *
1306  * The default handler is sp_default_debug_handler().
1307  *
1308  * @since 0.1.0
1309  */
1310 void sp_set_debug_handler(void (*handler)(const char *format, ...));
1311
1312 /**
1313  * Default handler function for library debugging messages.
1314  *
1315  * This function prints debug messages to the standard error stream if the
1316  * environment variable LIBSERIALPORT_DEBUG is set. Otherwise, they are
1317  * ignored.
1318  *
1319  * @since 0.1.0
1320  */
1321 void sp_default_debug_handler(const char *format, ...);
1322
1323 /** @} */
1324
1325 /**
1326  * @defgroup Versions Versions
1327  *
1328  * Version number querying functions, definitions, and macros.
1329  *
1330  * This set of API calls returns two different version numbers related
1331  * to libserialport. The "package version" is the release version number of the
1332  * libserialport tarball in the usual "major.minor.micro" format, e.g. "0.1.0".
1333  *
1334  * The "library version" is independent of that; it is the libtool version
1335  * number in the "current:revision:age" format, e.g. "2:0:0".
1336  * See http://www.gnu.org/software/libtool/manual/libtool.html#Libtool-versioning for details.
1337  *
1338  * Both version numbers (and/or individual components of them) can be
1339  * retrieved via the API calls at runtime, and/or they can be checked at
1340  * compile/preprocessor time using the respective macros.
1341  *
1342  * @{
1343  */
1344
1345 /*
1346  * Package version macros (can be used for conditional compilation).
1347  */
1348
1349 /** The libserialport package 'major' version number. */
1350 #define SP_PACKAGE_VERSION_MAJOR @SP_PACKAGE_VERSION_MAJOR@
1351
1352 /** The libserialport package 'minor' version number. */
1353 #define SP_PACKAGE_VERSION_MINOR @SP_PACKAGE_VERSION_MINOR@
1354
1355 /** The libserialport package 'micro' version number. */
1356 #define SP_PACKAGE_VERSION_MICRO @SP_PACKAGE_VERSION_MICRO@
1357
1358 /** The libserialport package version ("major.minor.micro") as string. */
1359 #define SP_PACKAGE_VERSION_STRING "@SP_PACKAGE_VERSION@"
1360
1361 /*
1362  * Library/libtool version macros (can be used for conditional compilation).
1363  */
1364
1365 /** The libserialport libtool 'current' version number. */
1366 #define SP_LIB_VERSION_CURRENT @SP_LIB_VERSION_CURRENT@
1367
1368 /** The libserialport libtool 'revision' version number. */
1369 #define SP_LIB_VERSION_REVISION @SP_LIB_VERSION_REVISION@
1370
1371 /** The libserialport libtool 'age' version number. */
1372 #define SP_LIB_VERSION_AGE @SP_LIB_VERSION_AGE@
1373
1374 /** The libserialport libtool version ("current:revision:age") as string. */
1375 #define SP_LIB_VERSION_STRING "@SP_LIB_VERSION@"
1376
1377 /**
1378  * Get the major libserialport package version number.
1379  *
1380  * @return The major package version number.
1381  *
1382  * @since 0.1.0
1383  */
1384 int sp_get_major_package_version(void);
1385
1386 /**
1387  * Get the minor libserialport package version number.
1388  *
1389  * @return The minor package version number.
1390  *
1391  * @since 0.1.0
1392  */
1393 int sp_get_minor_package_version(void);
1394
1395 /**
1396  * Get the micro libserialport package version number.
1397  *
1398  * @return The micro package version number.
1399  *
1400  * @since 0.1.0
1401  */
1402 int sp_get_micro_package_version(void);
1403
1404 /**
1405  * Get the libserialport package version number as a string.
1406  *
1407  * @return The package version number string. The returned string is
1408  *         static and thus should NOT be free'd by the caller.
1409  *
1410  * @since 0.1.0
1411  */
1412 const char *sp_get_package_version_string(void);
1413
1414 /**
1415  * Get the "current" part of the libserialport library version number.
1416  *
1417  * @return The "current" library version number.
1418  *
1419  * @since 0.1.0
1420  */
1421 int sp_get_current_lib_version(void);
1422
1423 /**
1424  * Get the "revision" part of the libserialport library version number.
1425  *
1426  * @return The "revision" library version number.
1427  *
1428  * @since 0.1.0
1429  */
1430 int sp_get_revision_lib_version(void);
1431
1432 /**
1433  * Get the "age" part of the libserialport library version number.
1434  *
1435  * @return The "age" library version number.
1436  *
1437  * @since 0.1.0
1438  */
1439 int sp_get_age_lib_version(void);
1440
1441 /**
1442  * Get the libserialport library version number as a string.
1443  *
1444  * @return The library version number string. The returned string is
1445  *         static and thus should NOT be free'd by the caller.
1446  *
1447  * @since 0.1.0
1448  */
1449 const char *sp_get_lib_version_string(void);
1450
1451 /** @} */
1452
1453 #ifdef __cplusplus
1454 }
1455 #endif
1456
1457 #endif