/* This file is part of libmspack.
 * (C) 2003-2004 Stuart Caie.
 *
 * libmspack is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License (LGPL) version 2.1
 *
 * For further details, see the file COPYING.LIB distributed with libmspack
 */

#pragma once

#ifdef _MSC_VER
#define inline
#endif

#ifdef DEBUG
#include <stdio.h>
#define D(x)                                                     \
    do {                                                         \
        printf("%s:%d (%s) ", __FILE__, __LINE__, __FUNCTION__); \
        printf x;                                                \
        fputc('\n', stdout);                                     \
        fflush(stdout);                                          \
    } while (0);
#else
#define D(x)
#endif

/* endian-neutral reading of little-endian data */
#define __egi32(a, n) ((((a)[n + 3]) << 24) | (((a)[n + 2]) << 16) | (((a)[n + 1]) << 8) | ((a)[n + 0]))
#define EndGetI64(a) ((((unsigned long long int)__egi32(a, 4)) << 32) | ((unsigned int)__egi32(a, 0)))
#define EndGetI32(a) __egi32(a, 0)
#define EndGetI16(a) ((((a)[1]) << 8) | ((a)[0]))

/* endian-neutral reading of big-endian data */
#define EndGetM32(a) ((((a)[0]) << 24) | (((a)[1]) << 16) | (((a)[2]) << 8) | ((a)[3]))
#define EndGetM16(a) ((((a)[0]) << 8) | ((a)[1]))

extern struct mspack_system *mspack_default_system;

/* returns the length of a file opened for reading */
extern int mspack_sys_filelen(struct mspack_system *system, struct mspack_file *file, off_t *length);

/* validates a system structure */
extern int mspack_valid_system(struct mspack_system *sys);

/* Can't redfine intrinsics in Microsoft Visual C */
#ifndef _MSC_VER

/* inline memcmp() */
static inline int
memcmp(const void *s1, const void *s2, size_t n) {
    unsigned char *c1 = (unsigned char *)s1;
    unsigned char *c2 = (unsigned char *)s2;
    if (n == 0) return 0;
    while (--n && (*c1 == *c2)) c1++, c2++;
    return *c1 - *c2;
}

/* inline strlen() */
static inline size_t
strlen(const char *s) {
    const char *e = s;
    while (*e) e++;
    return e - s;
}
#endif
