sample_os.h

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#ifdef UNDER_CE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <Winsock2.h>
#define O_CREAT     1
#define O_TRUNC     2
#define O_WRONLY    4
#define O_RDONLY    8
#define O_LARGEFILE 0
#define O_EXCL		0
#define S_IRUSR		0
#define S_IWUSR		0
#define S_IRGRP		0
#define S_IROTH		0
#define S_IREAD		0
#define S_IWRITE	0
#define S_IRWXG		0
#define S_IRWXO		0
#define S_IRWXU		0
// The following defines are used by access function below.
#define R_OK        10 // check if the file has read permission
#define W_OK        11 // check if the file has write permission
#define X_OK        12 // check if the file has execute permission
#define F_OK        13 // check if the file exists

#define OPEN_FILE_FLAGS O_RDONLY

int open(char *fileName, int flags, ...);
int close(int fd);
int write(int fd, void* buf, int size);
int read(int fd, void* buf, int size);
int lseek(int fd, long offset, int pos);
int sleep(unsigned long sec);
int usleep(unsigned long microsec);
int gettimeofday(struct timeval *tv, struct timezone *tz);
int access(char *binFileName, int mode);
int strcasecmp(const char *s1, const char *s2);
char *getenv(const char *name);

#define fsync(x)
#define assert(x) ASSERT(x)
#define perror(x)
#define bcmp(x,y,seed) strcmp(x,y)
#define OUTPUT_DEBUG_STRING(x) OutputDebugString(x)
#define snprintf(x)
#define STDIN_FILENO 0
#define fdopen _wfdopen

#elif defined(WIN32)
#include <stdio.h>
#include <io.h>
#include <FCNTL.H>
#define O_LARGEFILE 0
#define S_IRUSR		0
#define S_IWUSR		0
#define S_IRGRP		0
#define S_IROTH		0
#define S_IRWXU		0
#define S_IRWXG		0
#define S_IRWXO		0

#include <stdlib.h>
#include <string.h>

#define OPEN_FILE_FLAGS (O_RDONLY | _O_BINARY)

#define fsync(x)

int sleep(int sec);
int usleep(int microsec);
int gettimeofday(struct timeval *tv, struct timezone *tz);
int mkstemp(char *templt);

#define snprintf	_snprintf
#define write		_write

struct timeval {
	long tv_sec;
	long tv_usec;
};

#else
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <assert.h>
#include <errno.h>

#define OPEN_FILE_FLAGS (O_RDONLY)

#endif