/*
 * Nexus Membrane: Userspace LwIP Configuration
 * Provides compiler-specific definitions for NPL networking.
 */

#ifndef LWIP_ARCH_CC_H
#define LWIP_ARCH_CC_H

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

// Freestanding: Declare what stdlib misses
extern int rand(void);
extern int printf(const char *format, ...);

#define LWIP_NO_INTTYPES_H 1

/* Byte Order */
#ifndef BYTE_ORDER
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
#define BYTE_ORDER LITTLE_ENDIAN
#endif

/* Types */
typedef uint8_t     u8_t;
typedef int8_t      s8_t;
typedef uint16_t    u16_t;
typedef int16_t     s16_t;
typedef uint32_t    u32_t;
typedef int32_t     s32_t;
typedef uintptr_t   mem_ptr_t;

/* Sys Prot Type (Critical Section) */
typedef u32_t       sys_prot_t;

/* Error code */
#define LWIP_ERR_T  s8_t

/* Printf formatters */
#define U16_F "u"
#define S16_F "d"
#define X16_F "x"
#define U32_F "u"
#define S32_F "d"
#define X32_F "x"
#define SZT_F "zu"

/* Structure packing */
#if defined(__GNUC__) || defined(__clang__)
    #define PACK_STRUCT_FIELD(x) x
    #define PACK_STRUCT_STRUCT __attribute__((packed))
    #define PACK_STRUCT_BEGIN
    #define PACK_STRUCT_END
#else
    #define PACK_STRUCT_FIELD(x) x
    #define PACK_STRUCT_STRUCT
    #define PACK_STRUCT_BEGIN
    #define PACK_STRUCT_END
#endif

/* Diagnostic output */
#define LWIP_PLATFORM_DIAG(x) do { printf x; } while(0)

#define LWIP_PLATFORM_ASSERT(x) do { \
    printf("[LwIP] Assertion \"%s\" failed at line %d in %s\n", x, __LINE__, __FILE__); \
    while(1) asm("wfi"); \
} while(0)

#define LWIP_RAND() ((u32_t)rand())

#endif /* LWIP_ARCH_CC_H */