tcp: introduce common support code for TCP socket communication

[libsigrok.git] / src / libsigrok-internal.h

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef LIBSIGROK_LIBSIGROK_INTERNAL_H
#define LIBSIGROK_LIBSIGROK_INTERNAL_H

#include "config.h"

#include <glib.h>
#ifdef HAVE_LIBHIDAPI
#include <hidapi.h>
#endif
#ifdef HAVE_LIBSERIALPORT
#include <libserialport.h>
#endif
#ifdef HAVE_LIBUSB_1_0
#include <libusb.h>
#endif
#ifdef HAVE_LIBFTDI
#include <ftdi.h>
#endif
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

struct zip;
struct zip_stat;

/**
 * @file
 *
 * libsigrok private header file, only to be used internally.
 */

/*--- Macros ----------------------------------------------------------------*/

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#endif

#ifndef ARRAY_AND_SIZE
#define ARRAY_AND_SIZE(a) (a), ARRAY_SIZE(a)
#endif

#ifndef G_SOURCE_FUNC
#define G_SOURCE_FUNC(f) ((GSourceFunc) (void (*)(void)) (f)) /* Since 2.58. */
#endif

#define SR_RECEIVE_DATA_CALLBACK(f) \
        ((sr_receive_data_callback) (void (*)(void)) (f))

/**
 * Read a 8 bits unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint8_t read_u8(const uint8_t *p)
{
        return p[0];
}
#define R8(x)   read_u8((const uint8_t *)(x))

/**
 * Read an 8 bits signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding signed integer
 */
static inline int8_t read_i8(const uint8_t *p)
{
        return (int8_t)p[0];
}

/**
 * Read a 16 bits big endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint16_t read_u16be(const uint8_t *p)
{
        uint16_t u;

        u = 0;
        u <<= 8; u |= p[0];
        u <<= 8; u |= p[1];

        return u;
}
#define RB16(x) read_u16be((const uint8_t *)(x))

/**
 * Read a 16 bits little endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint16_t read_u16le(const uint8_t *p)
{
        uint16_t u;

        u = 0;
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[0];

        return u;
}
#define RL16(x) read_u16le((const uint8_t *)(x))

/**
 * Read a 16 bits big endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding signed integer
 */
static inline int16_t read_i16be(const uint8_t *p)
{
        uint16_t u;
        int16_t i;

        u = read_u16be(p);
        i = (int16_t)u;

        return i;
}
#define RB16S(x) read_i16be((const uint8_t *)(x))

/**
 * Read a 16 bits little endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding signed integer
 */
static inline int16_t read_i16le(const uint8_t *p)
{
        uint16_t u;
        int16_t i;

        u = read_u16le(p);
        i = (int16_t)u;

        return i;
}
#define RL16S(x) read_i16le((const uint8_t *)(x))

/**
 * Read a 24 bits little endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint32_t read_u24le(const uint8_t *p)
{
        uint32_t u;

        u = 0;
        u <<= 8; u |= p[2];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[0];

        return u;
}

/**
 * Read a 24 bits big endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint32_t read_u24be(const uint8_t *p)
{
        uint32_t u;

        u = 0;
        u <<= 8; u |= p[0];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[2];

        return u;
}

/**
 * Read a 32 bits big endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint32_t read_u32be(const uint8_t *p)
{
        uint32_t u;

        u = 0;
        u <<= 8; u |= p[0];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[2];
        u <<= 8; u |= p[3];

        return u;
}
#define RB32(x) read_u32be((const uint8_t *)(x))

/**
 * Read a 32 bits little endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint32_t read_u32le(const uint8_t *p)
{
        uint32_t u;

        u = 0;
        u <<= 8; u |= p[3];
        u <<= 8; u |= p[2];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[0];

        return u;
}
#define RL32(x) read_u32le((const uint8_t *)(x))

/**
 * Read a 32 bits big endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding signed integer
 */
static inline int32_t read_i32be(const uint8_t *p)
{
        uint32_t u;
        int32_t i;

        u = read_u32be(p);
        i = (int32_t)u;

        return i;
}
#define RB32S(x) read_i32be((const uint8_t *)(x))

/**
 * Read a 32 bits little endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding signed integer
 */
static inline int32_t read_i32le(const uint8_t *p)
{
        uint32_t u;
        int32_t i;

        u = read_u32le(p);
        i = (int32_t)u;

        return i;
}
#define RL32S(x) read_i32le((const uint8_t *)(x))

/**
 * Read a 64 bits big endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint64_t read_u64be(const uint8_t *p)
{
        uint64_t u;

        u = 0;
        u <<= 8; u |= p[0];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[2];
        u <<= 8; u |= p[3];
        u <<= 8; u |= p[4];
        u <<= 8; u |= p[5];
        u <<= 8; u |= p[6];
        u <<= 8; u |= p[7];

        return u;
}
#define RB64(x) read_u64be((const uint8_t *)(x))

/**
 * Read a 64 bits little endian unsigned integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline uint64_t read_u64le(const uint8_t *p)
{
        uint64_t u;

        u = 0;
        u <<= 8; u |= p[7];
        u <<= 8; u |= p[6];
        u <<= 8; u |= p[5];
        u <<= 8; u |= p[4];
        u <<= 8; u |= p[3];
        u <<= 8; u |= p[2];
        u <<= 8; u |= p[1];
        u <<= 8; u |= p[0];

        return u;
}
#define RL64(x) read_u64le((const uint8_t *)(x))

/**
 * Read a 64 bits big endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline int64_t read_i64be(const uint8_t *p)
{
        uint64_t u;
        int64_t i;

        u = read_u64be(p);
        i = (int64_t)u;

        return i;
}
#define RB64S(x) read_i64be((const uint8_t *)(x))

/**
 * Read a 64 bits little endian signed integer out of memory.
 * @param x a pointer to the input memory
 * @return the corresponding unsigned integer
 */
static inline int64_t read_i64le(const uint8_t *p)
{
        uint64_t u;
        int64_t i;

        u = read_u64le(p);
        i = (int64_t)u;

        return i;
}
#define RL64S(x) read_i64le((const uint8_t *)(x))

/**
 * Read a 32 bits big endian float out of memory (single precision).
 * @param x a pointer to the input memory
 * @return the corresponding float
 */
static inline float read_fltbe(const uint8_t *p)
{
        /*
         * Implementor's note: Strictly speaking the "union" trick
         * is not portable. But this phrase was found to work on the
         * project's supported platforms, and serve well until a more
         * appropriate phrase is found.
         */
        union { uint32_t u32; float flt; } u;
        float f;

        u.u32 = read_u32be(p);
        f = u.flt;

        return f;
}
#define RBFL(x) read_fltbe((const uint8_t *)(x))

/**
 * Read a 32 bits little endian float out of memory (single precision).
 * @param x a pointer to the input memory
 * @return the corresponding float
 */
static inline float read_fltle(const uint8_t *p)
{
        /*
         * Implementor's note: Strictly speaking the "union" trick
         * is not portable. But this phrase was found to work on the
         * project's supported platforms, and serve well until a more
         * appropriate phrase is found.
         */
        union { uint32_t u32; float flt; } u;
        float f;

        u.u32 = read_u32le(p);
        f = u.flt;

        return f;
}
#define RLFL(x) read_fltle((const uint8_t *)(x))

/**
 * Read a 64 bits big endian float out of memory (double precision).
 * @param x a pointer to the input memory
 * @return the corresponding floating point value
 */
static inline double read_dblbe(const uint8_t *p)
{
        /*
         * Implementor's note: Strictly speaking the "union" trick
         * is not portable. But this phrase was found to work on the
         * project's supported platforms, and serve well until a more
         * appropriate phrase is found.
         */
        union { uint64_t u64; double flt; } u;
        double f;

        u.u64 = read_u64be(p);
        f = u.flt;

        return f;
}

/**
 * Read a 64 bits little endian float out of memory (double precision).
 * @param x a pointer to the input memory
 * @return the corresponding floating point value
 */
static inline double read_dblle(const uint8_t *p)
{
        /*
         * Implementor's note: Strictly speaking the "union" trick
         * is not portable. But this phrase was found to work on the
         * project's supported platforms, and serve well until a more
         * appropriate phrase is found.
         */
        union { uint64_t u64; double flt; } u;
        double f;

        u.u64 = read_u64le(p);
        f = u.flt;

        return f;
}
#define RLDB(x) read_dblle((const uint8_t *)(x))

/**
 * Write a 8 bits unsigned integer to memory.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u8(uint8_t *p, uint8_t x)
{
        p[0] = x;
}
#define W8(p, x) write_u8((uint8_t *)(p), (uint8_t)(x))

/**
 * Write a 16 bits unsigned integer to memory stored as big endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u16be(uint8_t *p, uint16_t x)
{
        p[1] = x & 0xff; x >>= 8;
        p[0] = x & 0xff; x >>= 8;
}
#define WB16(p, x) write_u16be((uint8_t *)(p), (uint16_t)(x))

/**
 * Write a 16 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u16le(uint8_t *p, uint16_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
}
#define WL16(p, x) write_u16le((uint8_t *)(p), (uint16_t)(x))

/**
 * Write a 24 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u24le(uint8_t *p, uint32_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
}
#define WL24(p, x) write_u24le((uint8_t *)(p), (uint32_t)(x))

/**
 * Write a 32 bits unsigned integer to memory stored as big endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u32be(uint8_t *p, uint32_t x)
{
        p[3] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[0] = x & 0xff; x >>= 8;
}
#define WB32(p, x) write_u32be((uint8_t *)(p), (uint32_t)(x))

/**
 * Write a 32 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u32le(uint8_t *p, uint32_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[3] = x & 0xff; x >>= 8;
}
#define WL32(p, x) write_u32le((uint8_t *)(p), (uint32_t)(x))

/**
 * Write a 40 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u40le(uint8_t *p, uint64_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[3] = x & 0xff; x >>= 8;
        p[4] = x & 0xff; x >>= 8;
}
#define WL40(p, x) write_u40le((uint8_t *)(p), (uint64_t)(x))

/**
 * Write a 48 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u48le(uint8_t *p, uint64_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[3] = x & 0xff; x >>= 8;
        p[4] = x & 0xff; x >>= 8;
        p[5] = x & 0xff; x >>= 8;
}
#define WL48(p, x) write_u48le((uint8_t *)(p), (uint64_t)(x))

/**
 * Write a 64 bits unsigned integer to memory stored as big endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u64be(uint8_t *p, uint64_t x)
{
        p[7] = x & 0xff; x >>= 8;
        p[6] = x & 0xff; x >>= 8;
        p[5] = x & 0xff; x >>= 8;
        p[4] = x & 0xff; x >>= 8;
        p[3] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[0] = x & 0xff; x >>= 8;
}

/**
 * Write a 64 bits unsigned integer to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input unsigned integer
 */
static inline void write_u64le(uint8_t *p, uint64_t x)
{
        p[0] = x & 0xff; x >>= 8;
        p[1] = x & 0xff; x >>= 8;
        p[2] = x & 0xff; x >>= 8;
        p[3] = x & 0xff; x >>= 8;
        p[4] = x & 0xff; x >>= 8;
        p[5] = x & 0xff; x >>= 8;
        p[6] = x & 0xff; x >>= 8;
        p[7] = x & 0xff; x >>= 8;
}
#define WL64(p, x) write_u64le((uint8_t *)(p), (uint64_t)(x))

/**
 * Write a 32 bits float to memory stored as big endian.
 * @param p a pointer to the output memory
 * @param x the input float
 */
static inline void write_fltbe(uint8_t *p, float x)
{
        union { uint32_t u; float f; } u;
        u.f = x;
        write_u32be(p, u.u);
}
#define WBFL(p, x) write_fltbe((uint8_t *)(p), (x))

/**
 * Write a 32 bits float to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input float
 */
static inline void write_fltle(uint8_t *p, float x)
{
        union { uint32_t u; float f; } u;
        u.f = x;
        write_u32le(p, u.u);
}
#define WLFL(p, x) write_fltle((uint8_t *)(p), float (x))

/**
 * Write a 64 bits float to memory stored as little endian.
 * @param p a pointer to the output memory
 * @param x the input floating point value
 */
static inline void write_dblle(uint8_t *p, double x)
{
        union { uint64_t u; double f; } u;
        u.f = x;
        write_u64le(p, u.u);
}
#define WLDB(p, x) write_dblle((uint8_t *)(p), float (x))

/* Endianess conversion helpers with read/write position increment. */

/**
 * Read unsigned 8bit integer from raw memory, increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint8_t read_u8_inc(const uint8_t **p)
{
        uint8_t v;

        if (!p || !*p)
                return 0;
        v = read_u8(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 8bit integer, check length, increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in, out] l Remaining input payload length.
 * @return Retrieved integer value, unsigned.
 */
static inline uint8_t read_u8_inc_len(const uint8_t **p, size_t *l)
{
        uint8_t v;

        if (!p || !*p)
                return 0;
        if (l && *l < sizeof(v)) {
                *l = 0;
                return 0;
        }
        v = read_u8(*p);
        *p += sizeof(v);
        if (l)
                *l -= sizeof(v);

        return v;
}

/**
 * Read signed 8bit integer from raw memory, increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, signed.
 */
static inline int8_t read_i8_inc(const uint8_t **p)
{
        int8_t v;

        if (!p || !*p)
                return 0;
        v = read_i8(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 16bit integer from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint16_t read_u16be_inc(const uint8_t **p)
{
        uint16_t v;

        if (!p || !*p)
                return 0;
        v = read_u16be(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 16bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint16_t read_u16le_inc(const uint8_t **p)
{
        uint16_t v;

        if (!p || !*p)
                return 0;
        v = read_u16le(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 16bit integer (LE format), check length, increment position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in, out] l Remaining input payload length.
 * @return Retrieved integer value, unsigned.
 */
static inline uint16_t read_u16le_inc_len(const uint8_t **p, size_t *l)
{
        uint16_t v;

        if (!p || !*p)
                return 0;
        if (l && *l < sizeof(v)) {
                *l = 0;
                return 0;
        }
        v = read_u16le(*p);
        *p += sizeof(v);
        if (l)
                *l -= sizeof(v);

        return v;
}

/**
 * Read signed 16bit integer from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, signed.
 */
static inline int16_t read_i16be_inc(const uint8_t **p)
{
        int16_t v;

        if (!p || !*p)
                return 0;
        v = read_i16be(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read signed 16bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, signed.
 */
static inline int16_t read_i16le_inc(const uint8_t **p)
{
        int16_t v;

        if (!p || !*p)
                return 0;
        v = read_i16le(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 24bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint32_t read_u24le_inc(const uint8_t **p)
{
        uint32_t v;

        if (!p || !*p)
                return 0;
        v = read_u24le(*p);
        *p += 3 * sizeof(uint8_t);

        return v;
}

/**
 * Read unsigned 32bit integer from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint32_t read_u32be_inc(const uint8_t **p)
{
        uint32_t v;

        if (!p || !*p)
                return 0;
        v = read_u32be(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 32bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint32_t read_u32le_inc(const uint8_t **p)
{
        uint32_t v;

        if (!p || !*p)
                return 0;
        v = read_u32le(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read signed 32bit integer from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, signed.
 */
static inline int32_t read_i32be_inc(const uint8_t **p)
{
        int32_t v;

        if (!p || !*p)
                return 0;
        v = read_i32be(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read signed 32bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, signed.
 */
static inline int32_t read_i32le_inc(const uint8_t **p)
{
        int32_t v;

        if (!p || !*p)
                return 0;
        v = read_i32le(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 64bit integer from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint64_t read_u64be_inc(const uint8_t **p)
{
        uint64_t v;

        if (!p || !*p)
                return 0;
        v = read_u64be(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read unsigned 64bit integer from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved integer value, unsigned.
 */
static inline uint64_t read_u64le_inc(const uint8_t **p)
{
        uint64_t v;

        if (!p || !*p)
                return 0;
        v = read_u64le(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read 32bit float from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved float value.
 */
static inline float read_fltbe_inc(const uint8_t **p)
{
        float v;

        if (!p || !*p)
                return 0;
        v = read_fltbe(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read 32bit float from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved float value.
 */
static inline float read_fltle_inc(const uint8_t **p)
{
        float v;

        if (!p || !*p)
                return 0;
        v = read_fltle(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read 64bit float from raw memory (big endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved float value.
 */
static inline double read_dblbe_inc(const uint8_t **p)
{
        double v;

        if (!p || !*p)
                return 0;
        v = read_dblbe(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Read 64bit float from raw memory (little endian format), increment read position.
 * @param[in, out] p Pointer into byte stream.
 * @return Retrieved float value.
 */
static inline double read_dblle_inc(const uint8_t **p)
{
        double v;

        if (!p || !*p)
                return 0;
        v = read_dblle(*p);
        *p += sizeof(v);

        return v;
}

/**
 * Write unsigned 8bit integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u8_inc(uint8_t **p, uint8_t x)
{
        if (!p || !*p)
                return;
        write_u8(*p, x);
        *p += sizeof(x);
}

/**
 * Write unsigned 16bit big endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u16be_inc(uint8_t **p, uint16_t x)
{
        if (!p || !*p)
                return;
        write_u16be(*p, x);
        *p += sizeof(x);
}

/**
 * Write unsigned 16bit little endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u16le_inc(uint8_t **p, uint16_t x)
{
        if (!p || !*p)
                return;
        write_u16le(*p, x);
        *p += sizeof(x);
}

/**
 * Write unsigned 24bit liggle endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u24le_inc(uint8_t **p, uint32_t x)
{
        if (!p || !*p)
                return;
        write_u24le(*p, x);
        *p += 3 * sizeof(uint8_t);
}

/**
 * Write unsigned 32bit big endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u32be_inc(uint8_t **p, uint32_t x)
{
        if (!p || !*p)
                return;
        write_u32be(*p, x);
        *p += sizeof(x);
}

/**
 * Write unsigned 32bit little endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u32le_inc(uint8_t **p, uint32_t x)
{
        if (!p || !*p)
                return;
        write_u32le(*p, x);
        *p += sizeof(x);
}

/**
 * Write unsigned 40bit little endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u40le_inc(uint8_t **p, uint64_t x)
{
        if (!p || !*p)
                return;
        write_u40le(*p, x);
        *p += 5 * sizeof(uint8_t);
}

/**
 * Write unsigned 48bit little endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u48le_inc(uint8_t **p, uint64_t x)
{
        if (!p || !*p)
                return;
        write_u48le(*p, x);
        *p += 48 / 8 * sizeof(uint8_t);
}

/**
 * Write unsigned 64bit little endian integer to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_u64le_inc(uint8_t **p, uint64_t x)
{
        if (!p || !*p)
                return;
        write_u64le(*p, x);
        *p += sizeof(x);
}

/**
 * Write single precision little endian float to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_fltle_inc(uint8_t **p, float x)
{
        if (!p || !*p)
                return;
        write_fltle(*p, x);
        *p += sizeof(x);
}

/**
 * Write double precision little endian float to raw memory, increment write position.
 * @param[in, out] p Pointer into byte stream.
 * @param[in] x Value to write.
 */
static inline void write_dblle_inc(uint8_t **p, double x)
{
        if (!p || !*p)
                return;
        write_dblle(*p, x);
        *p += sizeof(x);
}

/* Portability fixes for FreeBSD. */
#ifdef __FreeBSD__
#define LIBUSB_CLASS_APPLICATION 0xfe
#define libusb_has_capability(x) 0
#define libusb_handle_events_timeout_completed(ctx, tv, c) \
        libusb_handle_events_timeout(ctx, tv)
#endif

/*
 * Convenience for FTDI library version dependency.
 * - Version 1.5 introduced ftdi_tciflush(), ftdi_tcoflush(), and
 *   ftdi_tcioflush() all within the same commit, and deprecated
 *   ftdi_usb_purge_buffers() which suffered from inverse semantics.
 *   The API is drop-in compatible (arguments count and data types are
 *   identical). The libsigrok source code always flushes RX and TX at
 *   the same time, never individually.
 */
#if defined HAVE_FTDI_TCIOFLUSH && HAVE_FTDI_TCIOFLUSH
#  define PURGE_FTDI_BOTH ftdi_tcioflush
#else
#  define PURGE_FTDI_BOTH ftdi_usb_purge_buffers
#endif

/* Static definitions of structs ending with an all-zero entry are a
 * problem when compiling with -Wmissing-field-initializers: GCC
 * suppresses the warning only with { 0 }, clang wants { } */
#ifdef __clang__
#define ALL_ZERO { }
#else
#define ALL_ZERO { 0 }
#endif

#ifdef __APPLE__
#define SR_DRIVER_LIST_SECTION "__DATA,__sr_driver_list"
#else
#define SR_DRIVER_LIST_SECTION "__sr_driver_list"
#endif

#if !defined SR_DRIVER_LIST_NOREORDER && defined __has_attribute
#if __has_attribute(no_reorder)
#define SR_DRIVER_LIST_NOREORDER __attribute__((no_reorder))
#endif
#endif
#if !defined SR_DRIVER_LIST_NOREORDER
#define SR_DRIVER_LIST_NOREORDER /* EMPTY */
#endif

/**
 * Register a list of hardware drivers.
 *
 * This macro can be used to register multiple hardware drivers to the library.
 * This is useful when a driver supports multiple similar but slightly
 * different devices that require different sr_dev_driver struct definitions.
 *
 * For registering only a single driver see SR_REGISTER_DEV_DRIVER().
 *
 * Example:
 * @code{c}
 * #define MY_DRIVER(_name) \
 *     &(struct sr_dev_driver){ \
 *         .name = _name, \
 *         ...
 *     };
 *
 * SR_REGISTER_DEV_DRIVER_LIST(my_driver_infos,
 *     MY_DRIVER("driver 1"),
 *     MY_DRIVER("driver 2"),
 *     ...
 * );
 * @endcode
 *
 * @param name Name to use for the driver list identifier.
 * @param ... Comma separated list of pointers to sr_dev_driver structs.
 */
#define SR_REGISTER_DEV_DRIVER_LIST(name, ...) \
        static const struct sr_dev_driver *name[] \
                SR_DRIVER_LIST_NOREORDER \
                __attribute__((section (SR_DRIVER_LIST_SECTION), used, \
                        aligned(sizeof(struct sr_dev_driver *)))) \
                = { \
                        __VA_ARGS__ \
                };

/**
 * Register a hardware driver.
 *
 * This macro is used to register a hardware driver with the library. It has
 * to be used in order to make the driver accessible to applications using the
 * library.
 *
 * The macro invocation should be placed directly under the struct
 * sr_dev_driver definition.
 *
 * Example:
 * @code{c}
 * static struct sr_dev_driver driver_info = {
 *     .name = "driver",
 *     ....
 * };
 * SR_REGISTER_DEV_DRIVER(driver_info);
 * @endcode
 *
 * @param name Identifier name of sr_dev_driver struct to register.
 */
#define SR_REGISTER_DEV_DRIVER(name) \
        SR_REGISTER_DEV_DRIVER_LIST(name##_list, &name);

SR_API void sr_drivers_init(struct sr_context *context);

struct sr_context {
        struct sr_dev_driver **driver_list;
#ifdef HAVE_LIBUSB_1_0
        libusb_context *libusb_ctx;
#endif
        sr_resource_open_callback resource_open_cb;
        sr_resource_close_callback resource_close_cb;
        sr_resource_read_callback resource_read_cb;
        void *resource_cb_data;
};

/** Input module metadata keys. */
enum sr_input_meta_keys {
        /** The input filename, if there is one. */
        SR_INPUT_META_FILENAME = 0x01,
        /** The input file's size in bytes. */
        SR_INPUT_META_FILESIZE = 0x02,
        /** The first 128 bytes of the file, provided as a GString. */
        SR_INPUT_META_HEADER = 0x04,

        /** The module cannot identify a file without this metadata. */
        SR_INPUT_META_REQUIRED = 0x80,
};

/** Input (file) module struct. */
struct sr_input {
        /**
         * A pointer to this input module's 'struct sr_input_module'.
         */
        const struct sr_input_module *module;
        GString *buf;
        struct sr_dev_inst *sdi;
        gboolean sdi_ready;
        void *priv;
};

/** Input (file) module driver. */
struct sr_input_module {
        /**
         * A unique ID for this input module, suitable for use in command-line
         * clients, [a-z0-9-]. Must not be NULL.
         */
        const char *id;

        /**
         * A unique name for this input module, suitable for use in GUI
         * clients, can contain UTF-8. Must not be NULL.
         */
        const char *name;

        /**
         * A short description of the input module. Must not be NULL.
         *
         * This can be displayed by frontends, e.g. when selecting the input
         * module for saving a file.
         */
        const char *desc;

        /**
         * A NULL terminated array of strings containing a list of file name
         * extensions typical for the input file format, or NULL if there is
         * no typical extension for this file format.
         */
        const char *const *exts;

        /**
         * Zero-terminated list of metadata items the module needs to be able
         * to identify an input stream. Can be all-zero, if the module cannot
         * identify streams at all, i.e. has to be forced into use.
         *
         * Each item is one of:
         *   SR_INPUT_META_FILENAME
         *   SR_INPUT_META_FILESIZE
         *   SR_INPUT_META_HEADER
         *
         * If the high bit (SR_INPUT META_REQUIRED) is set, the module cannot
         * identify a stream without the given metadata.
         */
        const uint8_t metadata[8];

        /**
         * Returns a NULL-terminated list of options this module can take.
         * Can be NULL, if the module has no options.
         */
        const struct sr_option *(*options) (void);

        /**
         * Check if this input module can load and parse the specified stream.
         *
         * @param[in] metadata Metadata the module can use to identify the stream.
         * @param[out] confidence "Strength" of the detection.
         *   Specialized handlers can take precedence over generic/basic support.
         *
         * @retval SR_OK This module knows the format.
         * @retval SR_ERR_NA There wasn't enough data for this module to
         *   positively identify the format.
         * @retval SR_ERR_DATA This module knows the format, but cannot handle
         *   it. This means the stream is either corrupt, or indicates a
         *   feature that the module does not support.
         * @retval SR_ERR This module does not know the format.
         *
         * Lower numeric values of 'confidence' mean that the input module
         * stronger believes in its capability to handle this specific format.
         * This way, multiple input modules can claim support for a format,
         * and the application can pick the best match, or try fallbacks
         * in case of errors. This approach also copes with formats that
         * are unreliable to detect in the absence of magic signatures.
         */
        int (*format_match) (GHashTable *metadata, unsigned int *confidence);

        /**
         * Initialize the input module.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*init) (struct sr_input *in, GHashTable *options);

        /**
         * Send data to the specified input instance.
         *
         * When an input module instance is created with sr_input_new(), this
         * function is used to feed data to the instance.
         *
         * As enough data gets fed into this function to completely populate
         * the device instance associated with this input instance, this is
         * guaranteed to return the moment it's ready. This gives the caller
         * the chance to examine the device instance, attach session callbacks
         * and so on.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*receive) (struct sr_input *in, GString *buf);

        /**
         * Signal the input module no more data will come.
         *
         * This will cause the module to process any data it may have buffered.
         * The SR_DF_END packet will also typically be sent at this time.
         */
        int (*end) (struct sr_input *in);

        /**
         * Reset the input module's input handling structures.
         *
         * Causes the input module to reset its internal state so that we can
         * re-send the input data from the beginning without having to
         * re-create the entire input module.
         *
         * @retval SR_OK Success.
         * @retval other Negative error code.
         */
        int (*reset) (struct sr_input *in);

        /**
         * This function is called after the caller is finished using
         * the input module, and can be used to free any internal
         * resources the module may keep.
         *
         * This function is optional.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        void (*cleanup) (struct sr_input *in);
};

/** Output module instance. */
struct sr_output {
        /** A pointer to this output's module. */
        const struct sr_output_module *module;

        /**
         * The device for which this output module is creating output. This
         * can be used by the module to find out channel names and numbers.
         */
        const struct sr_dev_inst *sdi;

        /**
         * The name of the file that the data should be written to.
         */
        const char *filename;

        /**
         * A generic pointer which can be used by the module to keep internal
         * state between calls into its callback functions.
         *
         * For example, the module might store a pointer to a chunk of output
         * there, and only flush it when it reaches a certain size.
         */
        void *priv;
};

/** Output module driver. */
struct sr_output_module {
        /**
         * A unique ID for this output module, suitable for use in command-line
         * clients, [a-z0-9-]. Must not be NULL.
         */
        const char *id;

        /**
         * A unique name for this output module, suitable for use in GUI
         * clients, can contain UTF-8. Must not be NULL.
         */
        const char *name;

        /**
         * A short description of the output module. Must not be NULL.
         *
         * This can be displayed by frontends, e.g. when selecting the output
         * module for saving a file.
         */
        const char *desc;

        /**
         * A NULL terminated array of strings containing a list of file name
         * extensions typical for the input file format, or NULL if there is
         * no typical extension for this file format.
         */
        const char *const *exts;

        /**
         * Bitfield containing flags that describe certain properties
         * this output module may or may not have.
         * @see sr_output_flags
         */
        const uint64_t flags;

        /**
         * Returns a NULL-terminated list of options this module can take.
         * Can be NULL, if the module has no options.
         */
        const struct sr_option *(*options) (void);

        /**
         * This function is called once, at the beginning of an output stream.
         *
         * The device struct will be available in the output struct passed in,
         * as well as the param field -- which may be NULL or an empty string,
         * if no parameter was passed.
         *
         * The module can use this to initialize itself, create a struct for
         * keeping state and storing it in the <code>internal</code> field.
         *
         * @param o Pointer to the respective 'struct sr_output'.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*init) (struct sr_output *o, GHashTable *options);

        /**
         * This function is passed a copy of every packet in the data feed.
         * Any output generated by the output module in response to the
         * packet should be returned in a newly allocated GString
         * <code>out</code>, which will be freed by the caller.
         *
         * Packets not of interest to the output module can just be ignored,
         * and the <code>out</code> parameter set to NULL.
         *
         * @param o Pointer to the respective 'struct sr_output'.
         * @param sdi The device instance that generated the packet.
         * @param packet The complete packet.
         * @param out A pointer where a GString * should be stored if
         * the module generates output, or NULL if not.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*receive) (const struct sr_output *o,
                        const struct sr_datafeed_packet *packet, GString **out);

        /**
         * This function is called after the caller is finished using
         * the output module, and can be used to free any internal
         * resources the module may keep.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*cleanup) (struct sr_output *o);
};

/** Transform module instance. */
struct sr_transform {
        /** A pointer to this transform's module. */
        const struct sr_transform_module *module;

        /**
         * The device for which this transform module is used. This
         * can be used by the module to find out channel names and numbers.
         */
        const struct sr_dev_inst *sdi;

        /**
         * A generic pointer which can be used by the module to keep internal
         * state between calls into its callback functions.
         */
        void *priv;
};

struct sr_transform_module {
        /**
         * A unique ID for this transform module, suitable for use in
         * command-line clients, [a-z0-9-]. Must not be NULL.
         */
        const char *id;

        /**
         * A unique name for this transform module, suitable for use in GUI
         * clients, can contain UTF-8. Must not be NULL.
         */
        const char *name;

        /**
         * A short description of the transform module. Must not be NULL.
         *
         * This can be displayed by frontends, e.g. when selecting
         * which transform module(s) to add.
         */
        const char *desc;

        /**
         * Returns a NULL-terminated list of options this transform module
         * can take. Can be NULL, if the transform module has no options.
         */
        const struct sr_option *(*options) (void);

        /**
         * This function is called once, at the beginning of a stream.
         *
         * @param t Pointer to the respective 'struct sr_transform'.
         * @param options Hash table of options for this transform module.
         *                Can be NULL if no options are to be used.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*init) (struct sr_transform *t, GHashTable *options);

        /**
         * This function is passed a pointer to every packet in the data feed.
         *
         * It can either return (in packet_out) a pointer to another packet
         * (possibly the exact same packet it got as input), or NULL.
         *
         * @param t Pointer to the respective 'struct sr_transform'.
         * @param packet_in Pointer to a datafeed packet.
         * @param packet_out Pointer to the resulting datafeed packet after
         *                   this function was run. If NULL, the transform
         *                   module intentionally didn't output a new packet.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*receive) (const struct sr_transform *t,
                        struct sr_datafeed_packet *packet_in,
                        struct sr_datafeed_packet **packet_out);

        /**
         * This function is called after the caller is finished using
         * the transform module, and can be used to free any internal
         * resources the module may keep.
         *
         * @retval SR_OK Success
         * @retval other Negative error code.
         */
        int (*cleanup) (struct sr_transform *t);
};

#ifdef HAVE_LIBUSB_1_0
/** USB device instance */
struct sr_usb_dev_inst {
        /** USB bus */
        uint8_t bus;
        /** Device address on USB bus */
        uint8_t address;
        /** libusb device handle */
        struct libusb_device_handle *devhdl;
};
#endif

/** Raw TCP device instance. */
struct sr_tcp_dev_inst {
        char *host_addr;        /**!< IP address or host name */
        char *tcp_port;         /**!< TCP port number/name */
        int sock_fd;            /**!< TCP socket's file descriptor */
};

struct sr_serial_dev_inst;
#ifdef HAVE_SERIAL_COMM
struct ser_lib_functions;
struct ser_hid_chip_functions;
struct sr_bt_desc;
typedef void (*serial_rx_chunk_callback)(struct sr_serial_dev_inst *serial,
        void *cb_data, const void *buf, size_t count);
struct sr_serial_dev_inst {
        /** Port name, e.g. '/dev/tty42'. */
        char *port;
        /** Comm params for serial_set_paramstr(). */
        char *serialcomm;
        struct ser_lib_functions *lib_funcs;
        struct {
                int bit_rate;
                int data_bits;
                int parity_bits;
                int stop_bits;
        } comm_params;
        GString *rcv_buffer;
        serial_rx_chunk_callback rx_chunk_cb_func;
        void *rx_chunk_cb_data;
#ifdef HAVE_LIBSERIALPORT
        /** libserialport port handle */
        struct sp_port *sp_data;
#endif
#ifdef HAVE_LIBHIDAPI
        enum ser_hid_chip_t {
                SER_HID_CHIP_UNKNOWN,           /**!< place holder */
                SER_HID_CHIP_BTC_BU86X,         /**!< Brymen BU86x */
                SER_HID_CHIP_SIL_CP2110,        /**!< SiLabs CP2110 */
                SER_HID_CHIP_VICTOR_DMM,        /**!< Victor 70/86 DMM cable */
                SER_HID_CHIP_WCH_CH9325,        /**!< WCH CH9325 */
                SER_HID_CHIP_LAST,              /**!< sentinel */
        } hid_chip;
        struct ser_hid_chip_functions *hid_chip_funcs;
        char *usb_path;
        char *usb_serno;
        const char *hid_path;
        hid_device *hid_dev;
        GSList *hid_source_args;
#endif
#ifdef HAVE_BLUETOOTH
        enum ser_bt_conn_t {
                SER_BT_CONN_UNKNOWN,    /**!< place holder */
                SER_BT_CONN_RFCOMM,     /**!< BT classic, RFCOMM channel */
                SER_BT_CONN_BLE122,     /**!< BLE, BLE122 module, indications */
                SER_BT_CONN_NRF51,      /**!< BLE, Nordic nRF51, notifications */
                SER_BT_CONN_CC254x,     /**!< BLE, TI CC254x, notifications */
                SER_BT_CONN_AC6328,     /**!< BLE, JL AC6328B, notifications */
                SER_BT_CONN_DIALOG,     /**!< BLE, dialog DA14580, notifications */
                SER_BT_CONN_NOTIFY,     /**!< BLE, generic notifications */
                SER_BT_CONN_MAX,        /**!< sentinel */
        } bt_conn_type;
        char *bt_addr_local;
        char *bt_addr_remote;
        size_t bt_rfcomm_channel;
        uint16_t bt_notify_handle_read;
        uint16_t bt_notify_handle_write;
        uint16_t bt_notify_handle_cccd;
        uint16_t bt_notify_value_cccd;
        uint16_t bt_ble_mtu;
        struct sr_bt_desc *bt_desc;
        GSList *bt_source_args;
#endif
};
#endif

struct sr_usbtmc_dev_inst {
        char *device;
        int fd;
};

/* Private driver context. */
struct drv_context {
        /** sigrok context */
        struct sr_context *sr_ctx;
        GSList *instances;
};

/*--- log.c -----------------------------------------------------------------*/

#if defined(_WIN32) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
/*
 * On MinGW, we need to specify the gnu_printf format flavor or GCC
 * will assume non-standard Microsoft printf syntax.
 */
SR_PRIV int sr_log(int loglevel, const char *format, ...)
                __attribute__((__format__ (__gnu_printf__, 2, 3)));
#else
SR_PRIV int sr_log(int loglevel, const char *format, ...) G_GNUC_PRINTF(2, 3);
#endif

/* Message logging helpers with subsystem-specific prefix string. */
#define sr_spew(...)    sr_log(SR_LOG_SPEW, LOG_PREFIX ": " __VA_ARGS__)
#define sr_dbg(...)     sr_log(SR_LOG_DBG,  LOG_PREFIX ": " __VA_ARGS__)
#define sr_info(...)    sr_log(SR_LOG_INFO, LOG_PREFIX ": " __VA_ARGS__)
#define sr_warn(...)    sr_log(SR_LOG_WARN, LOG_PREFIX ": " __VA_ARGS__)
#define sr_err(...)     sr_log(SR_LOG_ERR,  LOG_PREFIX ": " __VA_ARGS__)

/*--- device.c --------------------------------------------------------------*/

/** Scan options supported by a driver. */
#define SR_CONF_SCAN_OPTIONS 0x7FFF0000

/** Device options for a particular device. */
#define SR_CONF_DEVICE_OPTIONS 0x7FFF0001

/** Mask for separating config keys from capabilities. */
#define SR_CONF_MASK 0x1fffffff

/** Values for the changes argument of sr_dev_driver.config_channel_set. */
enum {
        /** The enabled state of the channel has been changed. */
        SR_CHANNEL_SET_ENABLED = 1 << 0,
};

SR_PRIV struct sr_channel *sr_channel_new(struct sr_dev_inst *sdi,
                int index, int type, gboolean enabled, const char *name);
SR_PRIV void sr_channel_free(struct sr_channel *ch);
SR_PRIV void sr_channel_free_cb(void *p);
SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi,
                struct sr_channel *cur_channel);
SR_PRIV gboolean sr_channels_differ(struct sr_channel *ch1, struct sr_channel *ch2);
SR_PRIV gboolean sr_channel_lists_differ(GSList *l1, GSList *l2);

SR_PRIV struct sr_channel_group *sr_channel_group_new(struct sr_dev_inst *sdi,
        const char *name, void *priv);
SR_PRIV void sr_channel_group_free(struct sr_channel_group *cg);
SR_PRIV void sr_channel_group_free_cb(void *cg);

/** Device instance data */
struct sr_dev_inst {
        /** Device driver. */
        struct sr_dev_driver *driver;
        /** Device instance status. SR_ST_NOT_FOUND, etc. */
        int status;
        /** Device instance type. SR_INST_USB, etc. */
        int inst_type;
        /** Device vendor. */
        char *vendor;
        /** Device model. */
        char *model;
        /** Device version. */
        char *version;
        /** Serial number. */
        char *serial_num;
        /** Connection string to uniquely identify devices. */
        char *connection_id;
        /** List of channels. */
        GSList *channels;
        /** List of sr_channel_group structs */
        GSList *channel_groups;
        /** Device instance connection data (used?) */
        void *conn;
        /** Device instance private data (used?) */
        void *priv;
        /** Session to which this device is currently assigned. */
        struct sr_session *session;
};

/* Generic device instances */
SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi);

#ifdef HAVE_LIBUSB_1_0
/* USB-specific instances */
SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
                uint8_t address, struct libusb_device_handle *hdl);
SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb);
SR_PRIV void sr_usb_dev_inst_free_cb(gpointer p); /* Glib wrapper. */
#endif

#ifdef HAVE_SERIAL_COMM
#ifndef HAVE_LIBSERIALPORT
/*
 * Some identifiers which initially got provided by libserialport are
 * used internally within the libsigrok serial layer's implementation,
 * while libserialport no longer is the exclusive provider of serial
 * communication support. Declare the identifiers here so they remain
 * available across all build configurations.
 */
enum libsp_parity {
        SP_PARITY_NONE = 0,
        SP_PARITY_ODD = 1,
        SP_PARITY_EVEN = 2,
        SP_PARITY_MARK = 3,
        SP_PARITY_SPACE = 4,
};

enum libsp_flowcontrol {
        SP_FLOWCONTROL_NONE = 0,
        SP_FLOWCONTROL_XONXOFF = 1,
        SP_FLOWCONTROL_RTSCTS = 2,
        SP_FLOWCONTROL_DTRDSR = 3,
};
#endif

/* Serial-specific instances */
SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port,
                const char *serialcomm);
SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial);
#endif

/* USBTMC-specific instances */
SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device);
SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc);

/*--- hwdriver.c ------------------------------------------------------------*/

SR_PRIV const GVariantType *sr_variant_type_get(int datatype);
SR_PRIV int sr_variant_type_check(uint32_t key, GVariant *data);
SR_PRIV void sr_hw_cleanup_all(const struct sr_context *ctx);
SR_PRIV struct sr_config *sr_config_new(uint32_t key, GVariant *data);
SR_PRIV void sr_config_free(struct sr_config *src);
SR_PRIV int sr_dev_acquisition_start(struct sr_dev_inst *sdi);
SR_PRIV int sr_dev_acquisition_stop(struct sr_dev_inst *sdi);

/*--- session.c -------------------------------------------------------------*/

struct sr_session {
        /** Context this session exists in. */
        struct sr_context *ctx;
        /** List of struct sr_dev_inst pointers. */
        GSList *devs;
        /** List of struct sr_dev_inst pointers owned by this session. */
        GSList *owned_devs;
        /** List of struct datafeed_callback pointers. */
        GSList *datafeed_callbacks;
        GSList *transforms;
        struct sr_trigger *trigger;

        /** Callback to invoke on session stop. */
        sr_session_stopped_callback stopped_callback;
        /** User data to be passed to the session stop callback. */
        void *stopped_cb_data;

        /** Mutex protecting the main context pointer. */
        GMutex main_mutex;
        /** Context of the session main loop. */
        GMainContext *main_context;

        /** Registered event sources for this session. */
        GHashTable *event_sources;
        /** Session main loop. */
        GMainLoop *main_loop;
        /** ID of idle source for dispatching the session stop notification. */
        unsigned int stop_check_id;
        /** Whether the session has been started. */
        gboolean running;
};

SR_PRIV int sr_session_source_add_internal(struct sr_session *session,
                void *key, GSource *source);
SR_PRIV int sr_session_source_remove_internal(struct sr_session *session,
                void *key);
SR_PRIV int sr_session_source_destroyed(struct sr_session *session,
                void *key, GSource *source);
SR_PRIV int sr_session_fd_source_add(struct sr_session *session,
                void *key, gintptr fd, int events, int timeout,
                sr_receive_data_callback cb, void *cb_data);

SR_PRIV int sr_session_source_add(struct sr_session *session, int fd,
                int events, int timeout, sr_receive_data_callback cb, void *cb_data);
SR_PRIV int sr_session_source_add_pollfd(struct sr_session *session,
                GPollFD *pollfd, int timeout, sr_receive_data_callback cb,
                void *cb_data);
SR_PRIV int sr_session_source_add_channel(struct sr_session *session,
                GIOChannel *channel, int events, int timeout,
                sr_receive_data_callback cb, void *cb_data);
SR_PRIV int sr_session_source_remove(struct sr_session *session, int fd);
SR_PRIV int sr_session_source_remove_pollfd(struct sr_session *session,
                GPollFD *pollfd);
SR_PRIV int sr_session_source_remove_channel(struct sr_session *session,
                GIOChannel *channel);

SR_PRIV int sr_session_send_meta(const struct sr_dev_inst *sdi,
                uint32_t key, GVariant *var);
SR_PRIV int sr_session_send(const struct sr_dev_inst *sdi,
                const struct sr_datafeed_packet *packet);
SR_PRIV int sr_sessionfile_check(const char *filename);
SR_PRIV struct sr_dev_inst *sr_session_prepare_sdi(const char *filename,
                struct sr_session **session);

/*--- session_file.c --------------------------------------------------------*/

#if !HAVE_ZIP_DISCARD
/* Replace zip_discard() if not available. */
#define zip_discard(zip) sr_zip_discard(zip)
SR_PRIV void sr_zip_discard(struct zip *archive);
#endif

SR_PRIV GKeyFile *sr_sessionfile_read_metadata(struct zip *archive,
                        const struct zip_stat *entry);

/*--- analog.c --------------------------------------------------------------*/

SR_PRIV int sr_analog_init(struct sr_datafeed_analog *analog,
                           struct sr_analog_encoding *encoding,
                           struct sr_analog_meaning *meaning,
                           struct sr_analog_spec *spec,
                           int digits);

/*--- std.c -----------------------------------------------------------------*/

typedef int (*dev_close_callback)(struct sr_dev_inst *sdi);
typedef void (*std_dev_clear_callback)(void *priv);

SR_PRIV int std_init(struct sr_dev_driver *di, struct sr_context *sr_ctx);
SR_PRIV int std_cleanup(const struct sr_dev_driver *di);
SR_PRIV int std_dummy_dev_open(struct sr_dev_inst *sdi);
SR_PRIV int std_dummy_dev_close(struct sr_dev_inst *sdi);
SR_PRIV int std_dummy_dev_acquisition_start(const struct sr_dev_inst *sdi);
SR_PRIV int std_dummy_dev_acquisition_stop(struct sr_dev_inst *sdi);
#ifdef HAVE_SERIAL_COMM
SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi);
SR_PRIV int std_serial_dev_acquisition_stop(struct sr_dev_inst *sdi);
#endif
SR_PRIV int std_session_send_df_header(const struct sr_dev_inst *sdi);
SR_PRIV int std_session_send_df_end(const struct sr_dev_inst *sdi);
SR_PRIV int std_session_send_df_trigger(const struct sr_dev_inst *sdi);
SR_PRIV int std_session_send_df_frame_begin(const struct sr_dev_inst *sdi);
SR_PRIV int std_session_send_df_frame_end(const struct sr_dev_inst *sdi);
SR_PRIV int std_dev_clear_with_callback(const struct sr_dev_driver *driver,
                std_dev_clear_callback clear_private);
SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver);
SR_PRIV GSList *std_dev_list(const struct sr_dev_driver *di);
SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi);
SR_PRIV GSList *std_scan_complete(struct sr_dev_driver *di, GSList *devices);

SR_PRIV int std_opts_config_list(uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg,
        const uint32_t scanopts[], size_t scansize, const uint32_t drvopts[],
        size_t drvsize, const uint32_t devopts[], size_t devsize);

extern SR_PRIV const uint32_t NO_OPTS[1];

#define STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts) \
        std_opts_config_list(key, data, sdi, cg, ARRAY_AND_SIZE(scanopts), \
                ARRAY_AND_SIZE(drvopts), ARRAY_AND_SIZE(devopts))

SR_PRIV GVariant *std_gvar_tuple_array(const uint64_t a[][2], unsigned int n);
SR_PRIV GVariant *std_gvar_tuple_rational(const struct sr_rational *r, unsigned int n);
SR_PRIV GVariant *std_gvar_samplerates(const uint64_t samplerates[], unsigned int n);
SR_PRIV GVariant *std_gvar_samplerates_steps(const uint64_t samplerates[], unsigned int n);
SR_PRIV GVariant *std_gvar_min_max_step(double min, double max, double step);
SR_PRIV GVariant *std_gvar_min_max_step_array(const double a[3]);
SR_PRIV GVariant *std_gvar_min_max_step_thresholds(const double dmin, const double dmax, const double dstep);

SR_PRIV GVariant *std_gvar_tuple_u64(uint64_t low, uint64_t high);
SR_PRIV GVariant *std_gvar_tuple_double(double low, double high);

SR_PRIV GVariant *std_gvar_array_i32(const int32_t a[], unsigned int n);
SR_PRIV GVariant *std_gvar_array_u32(const uint32_t a[], unsigned int n);
SR_PRIV GVariant *std_gvar_array_u64(const uint64_t a[], unsigned int n);
SR_PRIV GVariant *std_gvar_array_str(const char *a[], unsigned int n);

SR_PRIV GVariant *std_gvar_thresholds(const double a[][2], unsigned int n);

SR_PRIV int std_str_idx(GVariant *data, const char *a[], unsigned int n);
SR_PRIV int std_u64_idx(GVariant *data, const uint64_t a[], unsigned int n);
SR_PRIV int std_u8_idx(GVariant *data, const uint8_t a[], unsigned int n);

SR_PRIV int std_str_idx_s(const char *s, const char *a[], unsigned int n);
SR_PRIV int std_u8_idx_s(uint8_t b, const uint8_t a[], unsigned int n);

SR_PRIV int std_u64_tuple_idx(GVariant *data, const uint64_t a[][2], unsigned int n);
SR_PRIV int std_double_tuple_idx(GVariant *data, const double a[][2], unsigned int n);
SR_PRIV int std_double_tuple_idx_d0(const double d, const double a[][2], unsigned int n);

SR_PRIV int std_cg_idx(const struct sr_channel_group *cg, struct sr_channel_group *a[], unsigned int n);

SR_PRIV int std_dummy_set_params(struct sr_serial_dev_inst *serial,
        int baudrate, int bits, int parity, int stopbits,
        int flowcontrol, int rts, int dtr);
SR_PRIV int std_dummy_set_handshake(struct sr_serial_dev_inst *serial,
        int rts, int dtr);

/*--- resource.c ------------------------------------------------------------*/

SR_PRIV int64_t sr_file_get_size(FILE *file);

SR_PRIV int sr_resource_open(struct sr_context *ctx,
                struct sr_resource *res, int type, const char *name)
                G_GNUC_WARN_UNUSED_RESULT;
SR_PRIV int sr_resource_close(struct sr_context *ctx,
                struct sr_resource *res);
SR_PRIV gssize sr_resource_read(struct sr_context *ctx,
                const struct sr_resource *res, void *buf, size_t count)
                G_GNUC_WARN_UNUSED_RESULT;
SR_PRIV void *sr_resource_load(struct sr_context *ctx, int type,
                const char *name, size_t *size, size_t max_size)
                G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;

/*--- strutil.c -------------------------------------------------------------*/

SR_PRIV int sr_atol(const char *str, long *ret);
SR_PRIV int sr_atol_base(const char *str, long *ret, char **end, int base);
SR_PRIV int sr_atoul_base(const char *str, unsigned long *ret, char **end, int base);
SR_PRIV int sr_atoi(const char *str, int *ret);
SR_PRIV int sr_atod(const char *str, double *ret);
SR_PRIV int sr_atof(const char *str, float *ret);
SR_PRIV int sr_atod_ascii(const char *str, double *ret);
SR_PRIV int sr_atod_ascii_digits(const char *str, double *ret, int *digits);
SR_PRIV int sr_atof_ascii(const char *str, float *ret);

SR_PRIV GString *sr_hexdump_new(const uint8_t *data, const size_t len);
SR_PRIV void sr_hexdump_free(GString *s);

/*--- soft-trigger.c --------------------------------------------------------*/

struct soft_trigger_logic {
        const struct sr_dev_inst *sdi;
        const struct sr_trigger *trigger;
        int count;
        int unitsize;
        int cur_stage;
        uint8_t *prev_sample;
        uint8_t *pre_trigger_buffer;
        uint8_t *pre_trigger_head;
        int pre_trigger_size;
        int pre_trigger_fill;
};

SR_PRIV int logic_channel_unitsize(GSList *channels);
SR_PRIV struct soft_trigger_logic *soft_trigger_logic_new(
                const struct sr_dev_inst *sdi, struct sr_trigger *trigger,
                int pre_trigger_samples);
SR_PRIV void soft_trigger_logic_free(struct soft_trigger_logic *st);
SR_PRIV int soft_trigger_logic_check(struct soft_trigger_logic *st, uint8_t *buf,
                int len, int *pre_trigger_samples);

/*--- serial.c --------------------------------------------------------------*/

#ifdef HAVE_SERIAL_COMM
enum {
        SERIAL_RDWR = 1,
        SERIAL_RDONLY = 2,
};

typedef gboolean (*packet_valid_callback)(const uint8_t *buf);
typedef int (*packet_valid_len_callback)(void *st,
        const uint8_t *p, size_t l, size_t *pl);

typedef GSList *(*sr_ser_list_append_t)(GSList *devs, const char *name,
                const char *desc);
typedef GSList *(*sr_ser_find_append_t)(GSList *devs, const char *name);

SR_PRIV int serial_open(struct sr_serial_dev_inst *serial, int flags);
SR_PRIV int serial_close(struct sr_serial_dev_inst *serial);
SR_PRIV int serial_flush(struct sr_serial_dev_inst *serial);
SR_PRIV int serial_drain(struct sr_serial_dev_inst *serial);
SR_PRIV size_t serial_has_receive_data(struct sr_serial_dev_inst *serial);
SR_PRIV int serial_write_blocking(struct sr_serial_dev_inst *serial,
                const void *buf, size_t count, unsigned int timeout_ms);
SR_PRIV int serial_write_nonblocking(struct sr_serial_dev_inst *serial,
                const void *buf, size_t count);
SR_PRIV int serial_read_blocking(struct sr_serial_dev_inst *serial, void *buf,
                size_t count, unsigned int timeout_ms);
SR_PRIV int serial_read_nonblocking(struct sr_serial_dev_inst *serial, void *buf,
                size_t count);
SR_PRIV int serial_set_read_chunk_cb(struct sr_serial_dev_inst *serial,
                serial_rx_chunk_callback cb, void *cb_data);
SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate,
                int bits, int parity, int stopbits, int flowcontrol, int rts, int dtr);
SR_PRIV int serial_set_handshake(struct sr_serial_dev_inst *serial,
                int rts, int dtr);
SR_PRIV int serial_set_paramstr(struct sr_serial_dev_inst *serial,
                const char *paramstr);
SR_PRIV int serial_readline(struct sr_serial_dev_inst *serial, char **buf,
                int *buflen, gint64 timeout_ms);
SR_PRIV int serial_stream_detect(struct sr_serial_dev_inst *serial,
                uint8_t *buf, size_t *buflen,
                size_t packet_size, packet_valid_callback is_valid,
                packet_valid_len_callback is_valid_len, size_t *return_size,
                uint64_t timeout_ms);
SR_PRIV int serial_source_add(struct sr_session *session,
                struct sr_serial_dev_inst *serial, int events, int timeout,
                sr_receive_data_callback cb, void *cb_data);
SR_PRIV int serial_source_remove(struct sr_session *session,
                struct sr_serial_dev_inst *serial);
SR_PRIV GSList *sr_serial_find_usb(uint16_t vendor_id, uint16_t product_id);
SR_PRIV int serial_timeout(struct sr_serial_dev_inst *port, int num_bytes);

SR_PRIV void sr_ser_discard_queued_data(struct sr_serial_dev_inst *serial);
SR_PRIV size_t sr_ser_has_queued_data(struct sr_serial_dev_inst *serial);
SR_PRIV void sr_ser_queue_rx_data(struct sr_serial_dev_inst *serial,
                const uint8_t *data, size_t len);
SR_PRIV size_t sr_ser_unqueue_rx_data(struct sr_serial_dev_inst *serial,
                uint8_t *data, size_t len);

struct ser_lib_functions {
        int (*open)(struct sr_serial_dev_inst *serial, int flags);
        int (*close)(struct sr_serial_dev_inst *serial);
        int (*flush)(struct sr_serial_dev_inst *serial);
        int (*drain)(struct sr_serial_dev_inst *serial);
        int (*write)(struct sr_serial_dev_inst *serial,
                        const void *buf, size_t count,
                        int nonblocking, unsigned int timeout_ms);
        int (*read)(struct sr_serial_dev_inst *serial,
                        void *buf, size_t count,
                        int nonblocking, unsigned int timeout_ms);
        int (*set_params)(struct sr_serial_dev_inst *serial,
                        int baudrate, int bits, int parity, int stopbits,
                        int flowcontrol, int rts, int dtr);
        int (*set_handshake)(struct sr_serial_dev_inst *serial,
                        int rts, int dtr);
        int (*setup_source_add)(struct sr_session *session,
                        struct sr_serial_dev_inst *serial,
                        int events, int timeout,
                        sr_receive_data_callback cb, void *cb_data);
        int (*setup_source_remove)(struct sr_session *session,
                        struct sr_serial_dev_inst *serial);
        GSList *(*list)(GSList *list, sr_ser_list_append_t append);
        GSList *(*find_usb)(GSList *list, sr_ser_find_append_t append,
                        uint16_t vendor_id, uint16_t product_id);
        int (*get_frame_format)(struct sr_serial_dev_inst *serial,
                        int *baud, int *bits);
        size_t (*get_rx_avail)(struct sr_serial_dev_inst *serial);
};
extern SR_PRIV struct ser_lib_functions *ser_lib_funcs_libsp;
SR_PRIV int ser_name_is_hid(struct sr_serial_dev_inst *serial);
extern SR_PRIV struct ser_lib_functions *ser_lib_funcs_hid;
SR_PRIV int ser_name_is_bt(struct sr_serial_dev_inst *serial);
extern SR_PRIV struct ser_lib_functions *ser_lib_funcs_bt;

#ifdef HAVE_LIBHIDAPI
struct vid_pid_item {
        uint16_t vid, pid;
};

struct ser_hid_chip_functions {
        const char *chipname;
        const char *chipdesc;
        const struct vid_pid_item *vid_pid_items;
        const int max_bytes_per_request;
        int (*set_params)(struct sr_serial_dev_inst *serial,
                        int baudrate, int bits, int parity, int stopbits,
                        int flowcontrol, int rts, int dtr);
        int (*read_bytes)(struct sr_serial_dev_inst *serial,
                        uint8_t *data, int space, unsigned int timeout);
        int (*write_bytes)(struct sr_serial_dev_inst *serial,
                        const uint8_t *data, int space);
        int (*flush)(struct sr_serial_dev_inst *serial);
        int (*drain)(struct sr_serial_dev_inst *serial);
};
extern SR_PRIV struct ser_hid_chip_functions *ser_hid_chip_funcs_bu86x;
extern SR_PRIV struct ser_hid_chip_functions *ser_hid_chip_funcs_ch9325;
extern SR_PRIV struct ser_hid_chip_functions *ser_hid_chip_funcs_cp2110;
extern SR_PRIV struct ser_hid_chip_functions *ser_hid_chip_funcs_victor;
SR_PRIV const char *ser_hid_chip_find_name_vid_pid(uint16_t vid, uint16_t pid);
#endif
#endif

SR_PRIV int sr_serial_extract_options(GSList *options,
        const char **serial_device, const char **serial_options);

/*--- bt/ API ---------------------------------------------------------------*/

#ifdef HAVE_BLUETOOTH
SR_PRIV const char *sr_bt_adapter_get_address(size_t idx);

struct sr_bt_desc;
typedef void (*sr_bt_scan_cb)(void *cb_data, const char *addr, const char *name);
typedef int (*sr_bt_data_cb)(void *cb_data, uint8_t *data, size_t dlen);

SR_PRIV struct sr_bt_desc *sr_bt_desc_new(void);
SR_PRIV void sr_bt_desc_free(struct sr_bt_desc *desc);

SR_PRIV int sr_bt_config_cb_scan(struct sr_bt_desc *desc,
        sr_bt_scan_cb cb, void *cb_data);
SR_PRIV int sr_bt_config_cb_data(struct sr_bt_desc *desc,
        sr_bt_data_cb cb, void *cb_data);
SR_PRIV int sr_bt_config_addr_local(struct sr_bt_desc *desc, const char *addr);
SR_PRIV int sr_bt_config_addr_remote(struct sr_bt_desc *desc, const char *addr);
SR_PRIV int sr_bt_config_rfcomm(struct sr_bt_desc *desc, size_t channel);
SR_PRIV int sr_bt_config_notify(struct sr_bt_desc *desc,
        uint16_t read_handle, uint16_t write_handle,
        uint16_t cccd_handle, uint16_t cccd_value,
        uint16_t ble_mtu);

SR_PRIV int sr_bt_scan_le(struct sr_bt_desc *desc, int duration);
SR_PRIV int sr_bt_scan_bt(struct sr_bt_desc *desc, int duration);

SR_PRIV int sr_bt_connect_ble(struct sr_bt_desc *desc);
SR_PRIV int sr_bt_connect_rfcomm(struct sr_bt_desc *desc);
SR_PRIV void sr_bt_disconnect(struct sr_bt_desc *desc);

SR_PRIV ssize_t sr_bt_read(struct sr_bt_desc *desc,
        void *data, size_t len);
SR_PRIV ssize_t sr_bt_write(struct sr_bt_desc *desc,
        const void *data, size_t len);

SR_PRIV int sr_bt_start_notify(struct sr_bt_desc *desc);
SR_PRIV int sr_bt_check_notify(struct sr_bt_desc *desc);
#endif

/*--- ezusb.c ---------------------------------------------------------------*/

#ifdef HAVE_LIBUSB_1_0
SR_PRIV int ezusb_reset(struct libusb_device_handle *hdl, int set_clear);
SR_PRIV int ezusb_install_firmware(struct sr_context *ctx, libusb_device_handle *hdl,
                                   const char *name);
SR_PRIV int ezusb_upload_firmware(struct sr_context *ctx, libusb_device *dev,
                                  int configuration, const char *name);
#endif

/*--- usb.c -----------------------------------------------------------------*/

SR_PRIV int sr_usb_split_conn(const char *conn,
        uint16_t *vid, uint16_t *pid, uint8_t *bus, uint8_t *addr);
#ifdef HAVE_LIBUSB_1_0
SR_PRIV GSList *sr_usb_find(libusb_context *usb_ctx, const char *conn);
SR_PRIV int sr_usb_open(libusb_context *usb_ctx, struct sr_usb_dev_inst *usb);
SR_PRIV void sr_usb_close(struct sr_usb_dev_inst *usb);
SR_PRIV int usb_source_add(struct sr_session *session, struct sr_context *ctx,
                int timeout, sr_receive_data_callback cb, void *cb_data);
SR_PRIV int usb_source_remove(struct sr_session *session, struct sr_context *ctx);
SR_PRIV int usb_get_port_path(libusb_device *dev, char *path, int path_len);
SR_PRIV gboolean usb_match_manuf_prod(libusb_device *dev,
                const char *manufacturer, const char *product);
#endif

/*--- tcp.c -----------------------------------------------------------------*/

SR_PRIV gboolean sr_fd_is_readable(int fd);

SR_PRIV struct sr_tcp_dev_inst *sr_tcp_dev_inst_new(
        const char *host_addr, const char *tcp_port);
SR_PRIV void sr_tcp_dev_inst_free(struct sr_tcp_dev_inst *tcp);
SR_PRIV int sr_tcp_get_port_path(struct sr_tcp_dev_inst *tcp,
        const char *prefix, char separator, char *path, size_t path_len);
SR_PRIV int sr_tcp_connect(struct sr_tcp_dev_inst *tcp);
SR_PRIV int sr_tcp_disconnect(struct sr_tcp_dev_inst *tcp);
SR_PRIV int sr_tcp_write_bytes(struct sr_tcp_dev_inst *tcp,
        const uint8_t *data, size_t dlen);
SR_PRIV int sr_tcp_read_bytes(struct sr_tcp_dev_inst *tcp,
        uint8_t *data, size_t dlen, gboolean nonblocking);
SR_PRIV int sr_tcp_source_add(struct sr_session *session,
        struct sr_tcp_dev_inst *tcp, int events, int timeout,
        sr_receive_data_callback cb, void *cb_data);
SR_PRIV int sr_tcp_source_remove(struct sr_session *session,
        struct sr_tcp_dev_inst *tcp);

/*--- binary_helpers.c ------------------------------------------------------*/

/** Binary value type */
enum binary_value_type {
        BVT_INVALID,

        BVT_UINT8,

        BVT_BE_UINT16,
        BVT_BE_UINT24,
        BVT_BE_UINT32,

        BVT_LE_UINT16,
        BVT_LE_UINT24,
        BVT_LE_UINT32,
};

/** Binary value specification */
struct binary_value_spec {
        size_t offset;                  /**!< Offset into binary image */
        enum binary_value_type type;    /**!< Data type to decode */
};

/**
 * Read extract a value from a binary data image, ensuring no out-of-bounds
 * read happens.
 *
 * @param[out] out Pointer to output buffer (conversion result)
 * @param[in] spec Binary value specification
 * @param[in] data Pointer to binary input data
 * @param[in] length Size of binary input data
 *
 * @return SR_OK on success, SR_ERR_* error code on failure.
 */
SR_PRIV int bv_get_value_len(float *out, const struct binary_value_spec *spec,
        const uint8_t *data, size_t length);

/**
 * Read extract a value from a binary data image, without bound check.
 *
 * @param[out] out Pointer to output buffer (conversion result)
 * @param[in] spec Binary value specification
 * @param[in] data Pointer to binary input data
 *
 * @return SR_OK on success, SR_ERR_* error code on failure.
 */
SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec,
        const uint8_t *data);

/*--- crc.c -----------------------------------------------------------------*/

#define SR_CRC16_DEFAULT_INIT 0xffffU

/**
 * Calculate a CRC16 checksum using the 0x8005 polynomial.
 *
 * This CRC16 flavor is also known as CRC16-ANSI or CRC16-MODBUS.
 *
 * @param crc Initial value (typically 0xffff)
 * @param buffer Input buffer
 * @param len Buffer length
 * @return Checksum
 */
SR_PRIV uint16_t sr_crc16(uint16_t crc, const uint8_t *buffer, int len);

/*--- modbus/modbus.c -------------------------------------------------------*/

struct sr_modbus_dev_inst {
        const char *name;
        const char *prefix;
        int priv_size;
        GSList *(*scan)(int modbusaddr);
        int (*dev_inst_new)(void *priv, const char *resource,
                char **params, const char *serialcomm, int modbusaddr);
        int (*open)(void *priv);
        int (*source_add)(struct sr_session *session, void *priv, int events,
                int timeout, sr_receive_data_callback cb, void *cb_data);
        int (*source_remove)(struct sr_session *session, void *priv);
        int (*send)(void *priv, const uint8_t *buffer, int buffer_size);
        int (*read_begin)(void *priv, uint8_t *function_code);
        int (*read_data)(void *priv, uint8_t *buf, int maxlen);
        int (*read_end)(void *priv);
        int (*close)(void *priv);
        void (*free)(void *priv);
        unsigned int read_timeout_ms;
        void *priv;
};

SR_PRIV GSList *sr_modbus_scan(struct drv_context *drvc, GSList *options,
                struct sr_dev_inst *(*probe_device)(struct sr_modbus_dev_inst *modbus));
SR_PRIV struct sr_modbus_dev_inst *modbus_dev_inst_new(const char *resource,
                const char *serialcomm, int modbusaddr);
SR_PRIV int sr_modbus_open(struct sr_modbus_dev_inst *modbus);
SR_PRIV int sr_modbus_source_add(struct sr_session *session,
                struct sr_modbus_dev_inst *modbus, int events, int timeout,
                sr_receive_data_callback cb, void *cb_data);
SR_PRIV int sr_modbus_source_remove(struct sr_session *session,
                struct sr_modbus_dev_inst *modbus);
SR_PRIV int sr_modbus_request(struct sr_modbus_dev_inst *modbus,
                              uint8_t *request, int request_size);
SR_PRIV int sr_modbus_reply(struct sr_modbus_dev_inst *modbus,
                            uint8_t *reply, int reply_size);
SR_PRIV int sr_modbus_request_reply(struct sr_modbus_dev_inst *modbus,
                                    uint8_t *request, int request_size,
                                    uint8_t *reply, int reply_size);
SR_PRIV int sr_modbus_read_coils(struct sr_modbus_dev_inst *modbus,
                                 int address, int nb_coils, uint8_t *coils);
SR_PRIV int sr_modbus_read_holding_registers(struct sr_modbus_dev_inst *modbus,
                                             int address, int nb_registers,
                                             uint16_t *registers);
SR_PRIV int sr_modbus_write_coil(struct sr_modbus_dev_inst *modbus,
                                 int address, int value);
SR_PRIV int sr_modbus_write_multiple_registers(struct sr_modbus_dev_inst*modbus,
                                               int address, int nb_registers,
                                               uint16_t *registers);
SR_PRIV int sr_modbus_close(struct sr_modbus_dev_inst *modbus);
SR_PRIV void sr_modbus_free(struct sr_modbus_dev_inst *modbus);

/*--- dmm/es519xx.c ---------------------------------------------------------*/

/**
 * All 11-byte es519xx chips repeat each block twice for each conversion cycle
 * so always read 2 blocks at a time.
 */
#define ES519XX_11B_PACKET_SIZE (11 * 2)
#define ES519XX_14B_PACKET_SIZE 14

struct es519xx_info {
        gboolean is_judge, is_voltage, is_auto, is_micro, is_current;
        gboolean is_milli, is_resistance, is_continuity, is_diode;
        gboolean is_frequency, is_rpm, is_capacitance, is_duty_cycle;
        gboolean is_temperature, is_celsius, is_fahrenheit;
        gboolean is_adp0, is_adp1, is_adp2, is_adp3;
        gboolean is_sign, is_batt, is_ol, is_pmax, is_pmin, is_apo;
        gboolean is_dc, is_ac, is_vahz, is_min, is_max, is_rel, is_hold;
        gboolean is_digit4, is_ul, is_vasel, is_vbar, is_lpf1, is_lpf0, is_rmr;
        uint32_t baudrate;
        int packet_size;
        gboolean alt_functions, fivedigits, clampmeter, selectable_lpf;
        int digits;
};

SR_PRIV gboolean sr_es519xx_2400_11b_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_2400_11b_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_2400_11b_altfn_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_2400_11b_altfn_parse(const uint8_t *buf,
                float *floatval, struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_19200_11b_5digits_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_19200_11b_5digits_parse(const uint8_t *buf,
                float *floatval, struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_19200_11b_clamp_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_19200_11b_clamp_parse(const uint8_t *buf,
                float *floatval, struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_19200_11b_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_19200_11b_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_19200_14b_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_19200_14b_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_es519xx_19200_14b_sel_lpf_packet_valid(const uint8_t *buf);
SR_PRIV int sr_es519xx_19200_14b_sel_lpf_parse(const uint8_t *buf,
                float *floatval, struct sr_datafeed_analog *analog, void *info);

/*--- dmm/fs9922.c ----------------------------------------------------------*/

#define FS9922_PACKET_SIZE 14

struct fs9922_info {
        gboolean is_auto, is_dc, is_ac, is_rel, is_hold, is_bpn, is_z1, is_z2;
        gboolean is_max, is_min, is_apo, is_bat, is_nano, is_z3, is_micro;
        gboolean is_milli, is_kilo, is_mega, is_beep, is_diode, is_percent;
        gboolean is_z4, is_volt, is_ampere, is_ohm, is_hfe, is_hertz, is_farad;
        gboolean is_celsius, is_fahrenheit;
        int bargraph_sign, bargraph_value;
};

SR_PRIV gboolean sr_fs9922_packet_valid(const uint8_t *buf);
SR_PRIV int sr_fs9922_parse(const uint8_t *buf, float *floatval,
                            struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9922_z1_diode(struct sr_datafeed_analog *analog, void *info);

/*--- dmm/fs9721.c ----------------------------------------------------------*/

#define FS9721_PACKET_SIZE 14

struct fs9721_info {
        gboolean is_ac, is_dc, is_auto, is_rs232, is_micro, is_nano, is_kilo;
        gboolean is_diode, is_milli, is_percent, is_mega, is_beep, is_farad;
        gboolean is_ohm, is_rel, is_hold, is_ampere, is_volt, is_hz, is_bat;
        gboolean is_c2c1_11, is_c2c1_10, is_c2c1_01, is_c2c1_00, is_sign;
};

SR_PRIV gboolean sr_fs9721_packet_valid(const uint8_t *buf);
SR_PRIV int sr_fs9721_parse(const uint8_t *buf, float *floatval,
                            struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9721_00_temp_c(struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9721_01_temp_c(struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9721_10_temp_c(struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9721_01_10_temp_f_c(struct sr_datafeed_analog *analog, void *info);
SR_PRIV void sr_fs9721_max_c_min(struct sr_datafeed_analog *analog, void *info);

/*--- dmm/mm38xr.c ---------------------------------------------------------*/

#define METERMAN_38XR_PACKET_SIZE 15

struct meterman_38xr_info { int dummy; };

SR_PRIV gboolean meterman_38xr_packet_valid(const uint8_t *buf);
SR_PRIV int meterman_38xr_parse(const uint8_t *buf, float *floatval,
        struct sr_datafeed_analog *analog, void *info);

/*--- dmm/ms2115b.c ---------------------------------------------------------*/

#define MS2115B_PACKET_SIZE 9

enum ms2115b_display {
        MS2115B_DISPLAY_MAIN,
        MS2115B_DISPLAY_SUB,
        MS2115B_DISPLAY_COUNT,
};

struct ms2115b_info {
        /* Selected channel. */
        size_t ch_idx;
        gboolean is_ac, is_dc, is_auto;
        gboolean is_diode, is_beep, is_farad;
        gboolean is_ohm, is_ampere, is_volt, is_hz;
        gboolean is_duty_cycle, is_percent;
};

extern SR_PRIV const char *ms2115b_channel_formats[];
SR_PRIV gboolean sr_ms2115b_packet_valid(const uint8_t *buf);
SR_PRIV int sr_ms2115b_parse(const uint8_t *buf, float *floatval,
        struct sr_datafeed_analog *analog, void *info);

/*--- dmm/ms8250d.c ---------------------------------------------------------*/

#define MS8250D_PACKET_SIZE 18

struct ms8250d_info {
        gboolean is_ac, is_dc, is_auto, is_rs232, is_micro, is_nano, is_kilo;
        gboolean is_diode, is_milli, is_percent, is_mega, is_beep, is_farad;
        gboolean is_ohm, is_rel, is_hold, is_ampere, is_volt, is_hz, is_bat;
        gboolean is_ncv, is_min, is_max, is_sign, is_autotimer;
};

SR_PRIV gboolean sr_ms8250d_packet_valid(const uint8_t *buf);
SR_PRIV int sr_ms8250d_parse(const uint8_t *buf, float *floatval,
                             struct sr_datafeed_analog *analog, void *info);

/*--- dmm/dtm0660.c ---------------------------------------------------------*/

#define DTM0660_PACKET_SIZE 15

struct dtm0660_info {
        gboolean is_ac, is_dc, is_auto, is_rs232, is_micro, is_nano, is_kilo;
        gboolean is_diode, is_milli, is_percent, is_mega, is_beep, is_farad;
        gboolean is_ohm, is_rel, is_hold, is_ampere, is_volt, is_hz, is_bat;
        gboolean is_degf, is_degc, is_c2c1_01, is_c2c1_00, is_apo, is_min;
        gboolean is_minmax, is_max, is_sign;
};

SR_PRIV gboolean sr_dtm0660_packet_valid(const uint8_t *buf);
SR_PRIV int sr_dtm0660_parse(const uint8_t *buf, float *floatval,
                        struct sr_datafeed_analog *analog, void *info);

/*--- dmm/m2110.c -----------------------------------------------------------*/

#define BBCGM_M2110_PACKET_SIZE 9

/* Dummy info struct. The parser does not use it. */
struct m2110_info { int dummy; };

SR_PRIV gboolean sr_m2110_packet_valid(const uint8_t *buf);
SR_PRIV int sr_m2110_parse(const uint8_t *buf, float *floatval,
                             struct sr_datafeed_analog *analog, void *info);

/*--- dmm/metex14.c ---------------------------------------------------------*/

#define METEX14_PACKET_SIZE 14

struct metex14_info {
        size_t ch_idx;
        gboolean is_ac, is_dc, is_resistance, is_capacity, is_temperature;
        gboolean is_diode, is_frequency, is_ampere, is_volt, is_farad;
        gboolean is_hertz, is_ohm, is_celsius, is_fahrenheit, is_watt;
        gboolean is_pico, is_nano, is_micro, is_milli, is_kilo, is_mega;
        gboolean is_gain, is_decibel, is_power, is_decibel_mw, is_power_factor;
        gboolean is_hfe, is_unitless, is_logic, is_min, is_max, is_avg;
};

#ifdef HAVE_SERIAL_COMM
SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial);
#endif
SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf);
SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval,
                             struct sr_datafeed_analog *analog, void *info);
SR_PRIV gboolean sr_metex14_4packets_valid(const uint8_t *buf);
SR_PRIV int sr_metex14_4packets_parse(const uint8_t *buf, float *floatval,
                             struct sr_datafeed_analog *analog, void *info);

/*--- dmm/rs9lcd.c ----------------------------------------------------------*/

#define RS9LCD_PACKET_SIZE 9

/* Dummy info struct. The parser does not use it. */
struct rs9lcd_info { int dummy; };

SR_PRIV gboolean sr_rs9lcd_packet_valid(const uint8_t *buf);
SR_PRIV int sr_rs9lcd_parse(const uint8_t *buf, float *floatval,
                            struct sr_datafeed_analog *analog, void *info);

/*--- dmm/bm25x.c -----------------------------------------------------------*/

#define BRYMEN_BM25X_PACKET_SIZE 15

/* Dummy info struct. The parser does not use it. */
struct bm25x_info { int dummy; };

SR_PRIV gboolean sr_brymen_bm25x_packet_valid(const uint8_t *buf);
SR_PRIV int sr_brymen_bm25x_parse(const uint8_t *buf, float *floatval,
                             struct sr_datafeed_analog *analog, void *info);

/*--- dmm/bm52x.c -----------------------------------------------------------*/

#define BRYMEN_BM52X_PACKET_SIZE 24
#define BRYMEN_BM52X_DISPLAY_COUNT 2

struct brymen_bm52x_info { size_t ch_idx; };

#ifdef HAVE_SERIAL_COMM
SR_PRIV int sr_brymen_bm52x_packet_request(struct sr_serial_dev_inst *serial);
SR_PRIV int sr_brymen_bm82x_packet_request(struct sr_serial_dev_inst *serial);
#endif
SR_PRIV gboolean sr_brymen_bm52x_packet_valid(const uint8_t *buf);
SR_PRIV gboolean sr_brymen_bm82x_packet_valid(const uint8_t *buf);
/* BM520s and BM820s protocols are similar, the parse routine is shared. */
SR_PRIV int sr_brymen_bm52x_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

struct brymen_bm52x_state;

SR_PRIV void *brymen_bm52x_state_init(void);
SR_PRIV void brymen_bm52x_state_free(void *state);
SR_PRIV int brymen_bm52x_config_get(void *state, uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int brymen_bm52x_config_set(void *state, uint32_t key, GVariant *data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int brymen_bm52x_config_list(void *state, uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int brymen_bm52x_acquire_start(void *state,
        const struct sr_dev_inst *sdi,
        sr_receive_data_callback *cb, void **cb_data);

/*--- dmm/bm85x.c -----------------------------------------------------------*/

#define BRYMEN_BM85x_PACKET_SIZE_MIN 4

struct brymen_bm85x_info { int dummy; };

#ifdef HAVE_SERIAL_COMM
SR_PRIV int brymen_bm85x_after_open(struct sr_serial_dev_inst *serial);
SR_PRIV int brymen_bm85x_packet_request(struct sr_serial_dev_inst *serial);
#endif
SR_PRIV gboolean brymen_bm85x_packet_valid(void *state,
        const uint8_t *buf, size_t len, size_t *pkt_len);
SR_PRIV int brymen_bm85x_parse(void *state, const uint8_t *buf, size_t len,
        double *floatval, struct sr_datafeed_analog *analog, void *info);

/*--- dmm/bm86x.c -----------------------------------------------------------*/

#define BRYMEN_BM86X_PACKET_SIZE 24
#define BRYMEN_BM86X_DISPLAY_COUNT 2

struct brymen_bm86x_info { size_t ch_idx; };

#ifdef HAVE_SERIAL_COMM
SR_PRIV int sr_brymen_bm86x_packet_request(struct sr_serial_dev_inst *serial);
#endif
SR_PRIV gboolean sr_brymen_bm86x_packet_valid(const uint8_t *buf);
SR_PRIV int sr_brymen_bm86x_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- dmm/ut71x.c -----------------------------------------------------------*/

#define UT71X_PACKET_SIZE 11

struct ut71x_info {
        gboolean is_voltage, is_resistance, is_capacitance, is_temperature;
        gboolean is_celsius, is_fahrenheit, is_current, is_continuity;
        gboolean is_diode, is_frequency, is_duty_cycle, is_dc, is_ac;
        gboolean is_auto, is_manual, is_sign, is_power, is_loop_current;
};

SR_PRIV gboolean sr_ut71x_packet_valid(const uint8_t *buf);
SR_PRIV int sr_ut71x_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- dmm/vc870.c -----------------------------------------------------------*/

#define VC870_PACKET_SIZE 23

struct vc870_info {
        gboolean is_voltage, is_dc, is_ac, is_temperature, is_resistance;
        gboolean is_continuity, is_capacitance, is_diode, is_loop_current;
        gboolean is_current, is_micro, is_milli, is_power;
        gboolean is_power_factor_freq, is_power_apparent_power, is_v_a_rms_value;
        gboolean is_sign2, is_sign1, is_batt, is_ol1, is_max, is_min;
        gboolean is_maxmin, is_rel, is_ol2, is_open, is_manu, is_hold;
        gboolean is_light, is_usb, is_warning, is_auto_power, is_misplug_warn;
        gboolean is_lo, is_hi, is_open2;

        gboolean is_frequency, is_dual_display, is_auto;
};

SR_PRIV gboolean sr_vc870_packet_valid(const uint8_t *buf);
SR_PRIV int sr_vc870_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- dmm/vc96.c ------------------------------------------------------------*/

#define VC96_PACKET_SIZE 13

struct vc96_info {
        size_t ch_idx;
        gboolean is_ac, is_dc, is_resistance, is_diode, is_ampere, is_volt;
        gboolean is_ohm, is_micro, is_milli, is_kilo, is_mega, is_hfe;
        gboolean is_unitless;
};

SR_PRIV gboolean sr_vc96_packet_valid(const uint8_t *buf);
SR_PRIV int sr_vc96_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- lcr/es51919.c ---------------------------------------------------------*/

/* Acquisition details which apply to all supported serial-lcr devices. */
struct lcr_parse_info {
        size_t ch_idx;
        uint64_t output_freq;
        const char *circuit_model;
};

#define ES51919_PACKET_SIZE     17
#define ES51919_CHANNEL_COUNT   2
#define ES51919_COMM_PARAM      "9600/8n1/rts=1/dtr=1"

SR_PRIV int es51919_config_get(uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int es51919_config_set(uint32_t key, GVariant *data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int es51919_config_list(uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV gboolean es51919_packet_valid(const uint8_t *pkt);
SR_PRIV int es51919_packet_parse(const uint8_t *pkt, float *floatval,
        struct sr_datafeed_analog *analog, void *info);

/*--- lcr/vc4080.c ----------------------------------------------------------*/

/* Note: Also uses 'struct lcr_parse_info' from es51919 above. */

#define VC4080_PACKET_SIZE      39
#define VC4080_COMM_PARAM       "1200/8n1"
#define VC4080_WITH_DQ_CHANS    0 /* Enable separate D/Q channels? */

enum vc4080_display {
        VC4080_DISPLAY_PRIMARY,
        VC4080_DISPLAY_SECONDARY,
#if VC4080_WITH_DQ_CHANS
        VC4080_DISPLAY_D_VALUE,
        VC4080_DISPLAY_Q_VALUE,
#endif
        VC4080_CHANNEL_COUNT,
};

extern SR_PRIV const char *vc4080_channel_formats[VC4080_CHANNEL_COUNT];

SR_PRIV int vc4080_config_list(uint32_t key, GVariant **data,
        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg);
SR_PRIV int vc4080_packet_request(struct sr_serial_dev_inst *serial);
SR_PRIV gboolean vc4080_packet_valid(const uint8_t *pkt);
SR_PRIV int vc4080_packet_parse(const uint8_t *pkt, float *floatval,
        struct sr_datafeed_analog *analog, void *info);

/*--- dmm/ut372.c -----------------------------------------------------------*/

#define UT372_PACKET_SIZE 27

struct ut372_info {
        int dummy;
};

SR_PRIV gboolean sr_ut372_packet_valid(const uint8_t *buf);
SR_PRIV int sr_ut372_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- dmm/asycii.c ----------------------------------------------------------*/

#define ASYCII_PACKET_SIZE 16

struct asycii_info {
        gboolean is_ac, is_dc, is_ac_and_dc;
        gboolean is_resistance, is_capacitance, is_diode, is_gain;
        gboolean is_frequency, is_duty_cycle, is_duty_pos, is_duty_neg;
        gboolean is_pulse_width, is_period_pos, is_period_neg;
        gboolean is_pulse_count, is_count_pos, is_count_neg;
        gboolean is_ampere, is_volt, is_volt_ampere, is_farad, is_ohm;
        gboolean is_hertz, is_percent, is_seconds, is_decibel;
        gboolean is_pico, is_nano, is_micro, is_milli, is_kilo, is_mega;
        gboolean is_unitless;
        gboolean is_peak_min, is_peak_max;
        gboolean is_invalid;
};

#ifdef HAVE_SERIAL_COMM
SR_PRIV int sr_asycii_packet_request(struct sr_serial_dev_inst *serial);
#endif
SR_PRIV gboolean sr_asycii_packet_valid(const uint8_t *buf);
SR_PRIV int sr_asycii_parse(const uint8_t *buf, float *floatval,
                            struct sr_datafeed_analog *analog, void *info);

/*--- dmm/eev121gw.c --------------------------------------------------------*/

#define EEV121GW_PACKET_SIZE 19

enum eev121gw_display {
        EEV121GW_DISPLAY_MAIN,
        EEV121GW_DISPLAY_SUB,
        EEV121GW_DISPLAY_BAR,
        EEV121GW_DISPLAY_COUNT,
};

struct eev121gw_info {
        /* Selected channel. */
        size_t ch_idx;
        /*
         * Measured value, number and sign/overflow flags, scale factor
         * and significant digits.
         */
        uint32_t uint_value;
        gboolean is_ofl, is_neg;
        int factor, digits;
        /* Currently active mode (meter's function). */
        gboolean is_ac, is_dc, is_voltage, is_current, is_power, is_gain;
        gboolean is_resistance, is_capacitance, is_diode, is_temperature;
        gboolean is_continuity, is_frequency, is_period, is_duty_cycle;
        /* Quantities associated with mode/function. */
        gboolean is_ampere, is_volt, is_volt_ampere, is_dbm;
        gboolean is_ohm, is_farad, is_celsius, is_fahrenheit;
        gboolean is_hertz, is_seconds, is_percent, is_loop_current;
        gboolean is_unitless, is_logic;
        /* Other indicators. */
        gboolean is_min, is_max, is_avg, is_1ms_peak, is_rel, is_hold;
        gboolean is_low_pass, is_mem, is_bt, is_auto_range, is_test;
        gboolean is_auto_poweroff, is_low_batt;
};

extern SR_PRIV const char *eev121gw_channel_formats[];
SR_PRIV gboolean sr_eev121gw_packet_valid(const uint8_t *buf);
SR_PRIV int sr_eev121gw_3displays_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- scale/kern.c ----------------------------------------------------------*/

struct kern_info {
        gboolean is_gram, is_carat, is_ounce, is_pound, is_troy_ounce;
        gboolean is_pennyweight, is_grain, is_tael, is_momme, is_tola;
        gboolean is_percentage, is_piece, is_unstable, is_stable, is_error;
        int buflen;
};

SR_PRIV gboolean sr_kern_packet_valid(const uint8_t *buf);
SR_PRIV int sr_kern_parse(const uint8_t *buf, float *floatval,
                struct sr_datafeed_analog *analog, void *info);

/*--- sw_limits.c -----------------------------------------------------------*/

struct sr_sw_limits {
        uint64_t limit_samples;
        uint64_t limit_frames;
        uint64_t limit_msec;
        uint64_t samples_read;
        uint64_t frames_read;
        uint64_t start_time;
};

SR_PRIV int sr_sw_limits_config_get(const struct sr_sw_limits *limits, uint32_t key,
        GVariant **data);
SR_PRIV int sr_sw_limits_config_set(struct sr_sw_limits *limits, uint32_t key,
        GVariant *data);
SR_PRIV void sr_sw_limits_acquisition_start(struct sr_sw_limits *limits);
SR_PRIV gboolean sr_sw_limits_check(struct sr_sw_limits *limits);
SR_PRIV int sr_sw_limits_get_remain(const struct sr_sw_limits *limits,
        uint64_t *samples, uint64_t *frames, uint64_t *msecs,
        gboolean *exceeded);
SR_PRIV void sr_sw_limits_update_samples_read(struct sr_sw_limits *limits,
        uint64_t samples_read);
SR_PRIV void sr_sw_limits_update_frames_read(struct sr_sw_limits *limits,
        uint64_t frames_read);
SR_PRIV void sr_sw_limits_init(struct sr_sw_limits *limits);

/*--- feed_queue.h ----------------------------------------------------------*/

struct feed_queue_logic;
struct feed_queue_analog;

SR_API struct feed_queue_logic *feed_queue_logic_alloc(
        const struct sr_dev_inst *sdi,
        size_t sample_count, size_t unit_size);
SR_API int feed_queue_logic_submit(struct feed_queue_logic *q,
        const uint8_t *data, size_t count);
SR_API int feed_queue_logic_flush(struct feed_queue_logic *q);
SR_API int feed_queue_logic_send_trigger(struct feed_queue_logic *q);
SR_API void feed_queue_logic_free(struct feed_queue_logic *q);

SR_API struct feed_queue_analog *feed_queue_analog_alloc(
        const struct sr_dev_inst *sdi,
        size_t sample_count, int digits, struct sr_channel *ch);
SR_API int feed_queue_analog_mq_unit(struct feed_queue_analog *q,
        enum sr_mq mq, enum sr_mqflag mq_flag, enum sr_unit unit);
SR_API int feed_queue_analog_scale_offset(struct feed_queue_analog *q,
        const struct sr_rational *scale, const struct sr_rational *offset);
SR_API int feed_queue_analog_submit(struct feed_queue_analog *q,
        float data, size_t count);
SR_API int feed_queue_analog_flush(struct feed_queue_analog *q);
SR_API void feed_queue_analog_free(struct feed_queue_analog *q);

#endif