application/system.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2024 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef DAV_SYSTEM_H
#define DAV_SYSTEM_H

#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>


#ifdef _WIN32
#include <Windows.h>
#define mode_t unsigned int
#else
#include <dirent.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef struct SysDirEnt {
    char *name;
} SysDirEnt;
    
#ifdef _WIN32
struct WinDir {
    int first;
    HANDLE handle;
    WIN32_FIND_DATAW finddata;
    SysDirEnt *ent;
};
#define SYS_DIR struct WinDir*
#define SYS_STAT struct __stat64

typedef int uid_t;
typedef int gid_t;

#define SYS_ISLINK(path, mode) sys_islink(path)
#define SYS_LINK_EXT ".lnk"

#else

typedef struct SysDir {
    DIR *dir;
    SysDirEnt *ent;
} SysDir;

#define SYS_DIR SysDir*
#define SYS_STAT struct stat

#define SYS_ISLINK(p, s) S_ISLNK(s.st_mode)

#endif


#if !defined(S_ISREG) && defined(S_IFMT) && defined(S_IFREG)
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif

#ifdef _WIN32
#ifndef S_ISDIR
#define S_ISDIR(mode) ((mode) & _S_IFMT) == _S_IFDIR
#define S_ISREG(mode) ((mode) & _S_IFMT) == _S_IFREG
#endif
#endif


typedef int(*stat_func)(const char*, SYS_STAT *);

void sys_init(void);
void sys_uninit(void);

void sys_freedirent(SysDirEnt *ent);
SYS_DIR sys_opendir(const char *path);
SysDirEnt* sys_readdir(SYS_DIR dir);
void sys_closedir(SYS_DIR dir);

FILE* sys_fopen(const char *path, const char *mode);

int sys_stat(const char *path, SYS_STAT *s);
int sys_lstat(const char *path, SYS_STAT *s);

int sys_islink(const char *path);

int sys_rename(const char *oldpath, const char *newpath);
int sys_unlink(const char *path);
int sys_mkdir(const char *path);

char* sys_readlink(const char *path, SYS_STAT *s);

int sys_symlink(const char *target, const char *linkpath);

int sys_truncate(const char* path, off_t length);

#ifdef __cplusplus
}
#endif

#endif /* DAV_SYSTEM_H */