cplvsi.h

国际海图标准S-57格式数据读取源码VC

#ifndef CPL_VSI_H_INCLUDED
#define CPL_VSI_H_INCLUDED

#include "CplPort.h"
/**
 * \file cpl_vsi.h
 *
 * Standard C Covers
 *
 * The VSI functions are intended to be hookable aliases for Standard C
 * I/O, memory allocation and other system functions. They are intended
 * to allow virtualization of disk I/O so that non file data sources
 * can be made to appear as files, and so that additional error trapping
 * and reporting can be interested.  The memory access API is aliased
 * so that special application memory management services can be used.
 *
 * Is is intended that each of these functions retains exactly the same
 * calling pattern as the original Standard C functions they relate to.
 * This means we don't have to provide custom documentation, and also means
 * that the default implementation is very simple.
 */


/* -------------------------------------------------------------------- */
/*      We need access to ``struct stat''.                              */
/* -------------------------------------------------------------------- */
#ifndef _WIN32
#  include <unistd.h>
#endif
#if !defined(macos_pre10)
#  include <sys/stat.h>
#endif

CPL_C_START

/* ==================================================================== */
/*      stdio file access functions.                                    */
/* ==================================================================== */

FILE CPL_DLL *  VSIFOpen( const char *, const char * );
int CPL_DLL     VSIFClose( FILE * );
int CPL_DLL     VSIFSeek( FILE *, long, int );
long CPL_DLL    VSIFTell( FILE * );
void CPL_DLL    VSIRewind( FILE * );
void CPL_DLL    VSIFFlush( FILE * );

size_t CPL_DLL  VSIFRead( void *, size_t, size_t, FILE * );
size_t CPL_DLL  VSIFWrite( void *, size_t, size_t, FILE * );
char CPL_DLL   *VSIFGets( char *, int, FILE * );
int CPL_DLL     VSIFPuts( const char *, FILE * );
int CPL_DLL     VSIFPrintf( FILE *, const char *, ... );

int CPL_DLL     VSIFGetc( FILE * );
int CPL_DLL     VSIFPutc( int, FILE * );
int CPL_DLL     VSIUngetc( int, FILE * );
int CPL_DLL     VSIFEof( FILE * );

/* ==================================================================== */
/*      VSIStat() related.                                              */
/* ==================================================================== */

typedef struct stat VSIStatBuf;
int CPL_DLL VSIStat( const char *, VSIStatBuf * );

#ifdef _WIN32
#  define VSI_ISLNK(x)  ( 0 )            /* N/A on Windows */
#  define VSI_ISREG(x)  ((x) & S_IFREG)
#  define VSI_ISDIR(x)  ((x) & S_IFDIR)
#  define VSI_ISCHR(x)  ((x) & S_IFCHR)
#  define VSI_ISBLK(x)  ( 0 )            /* N/A on Windows */
#else
#  define VSI_ISLNK(x)  S_ISLNK(x)
#  define VSI_ISREG(x)  S_ISREG(x)
#  define VSI_ISDIR(x)  S_ISDIR(x)
#  define VSI_ISCHR(x)  S_ISCHR(x)
#  define VSI_ISBLK(x)  S_ISBLK(x)
#endif

/* ==================================================================== */
/*      64bit stdio file access functions.  If we have a big size       */
/*      defined, then provide protypes for the large file API,          */
/*      otherwise redefine to use the regular api.                      */
/* ==================================================================== */
#ifdef VSI_LARGE_API_SUPPORTED

typedef GUIntBig vsi_l_offset;

FILE CPL_DLL *  VSIFOpenL( const char *, const char * );
int CPL_DLL     VSIFCloseL( FILE * );
int CPL_DLL     VSIFSeekL( FILE *, vsi_l_offset, int );
vsi_l_offset CPL_DLL VSIFTellL( FILE * );
void CPL_DLL    VSIRewindL( FILE * );
size_t CPL_DLL  VSIFReadL( void *, size_t, size_t, FILE * );
size_t CPL_DLL  VSIFWriteL( void *, size_t, size_t, FILE * );
int CPL_DLL     VSIFEofL( FILE * );
void CPL_DLL    VSIFFlushL( FILE * );

#ifndef WIN32
typedef struct stat64 VSIStatBufL;
int CPL_DLL     VSIStatL( const char *, VSIStatBufL * );
#else
#define VSIStatBufL    VSIStatBuf
#define VSIStatL       VSIStat
#endif

#else

typedef long vsi_l_offset;

#define vsi_l_offset long

#define VSIFOpenL      VSIFOpen
#define VSIFCloseL     VSIFClose
#define VSIFSeekL      VSIFSeek
#define VSIFTellL      VSIFTell
#define VSIFRewindL    VSIFRewind
#define VSIFReadL      VSIFRead
#define VSIFWriteL     VSIFWrite
#define VSIFEofL       VSIFEof
#define VSIFFlushL     VSIFFlush
#define VSIStatBufL    VSIStatBuf
#define VSIStatL       VSIStat

#endif

/* ==================================================================== */
/*      Memory allocation                                               */
/* ==================================================================== */

void CPL_DLL   *VSICalloc( size_t, size_t );
void CPL_DLL   *VSIMalloc( size_t );
void CPL_DLL    VSIFree( void * );
void CPL_DLL   *VSIRealloc( void *, size_t );
char CPL_DLL   *VSIStrdup( const char * );

/* ==================================================================== */
/*      Other...                                                        */
/* ==================================================================== */

int CPL_DLL VSIMkdir( const char * pathname, long mode );
int CPL_DLL VSIRmdir( const char * pathname );
int CPL_DLL VSIUnlink( const char * pathname );
char CPL_DLL *VSIStrerror( int );

/* ==================================================================== */
/*      Time quering.                                                   */
/* ==================================================================== */

unsigned long CPL_DLL VSITime( unsigned long * );
const char CPL_DLL *VSICTime( unsigned long );
struct tm CPL_DLL *VSIGMTime( const time_t *pnTime,
                              struct tm *poBrokenTime );
struct tm CPL_DLL *VSILocalTime( const time_t *pnTime,
                                 struct tm *poBrokenTime );

/* -------------------------------------------------------------------- */
/*      the following can be turned on for detailed logging of          */
/*      almost all IO calls.                                            */
/* -------------------------------------------------------------------- */
#ifdef VSI_DEBUG

#ifndef DEBUG
#  define DEBUG
#endif

#include "cpl_error.h"

#define VSIDebug4(f,a1,a2,a3,a4)   CPLDebug( "VSI", f, a1, a2, a3, a4 );
#define VSIDebug3( f, a1, a2, a3 ) CPLDebug( "VSI", f, a1, a2, a3 );
#define VSIDebug2( f, a1, a2 )     CPLDebug( "VSI", f, a1, a2 );
#define VSIDebug1( f, a1 )         CPLDebug( "VSI", f, a1 );
#else
#define VSIDebug4( f, a1, a2, a3, a4 ) {}
#define VSIDebug3( f, a1, a2, a3 ) {}
#define VSIDebug2( f, a1, a2 )     {}
#define VSIDebug1( f, a1 )         {}
#endif

CPL_C_END

#endif /* ndef CPL_VSI_H_INCLUDED */