cst_file.h

/*************************************************************************/
/*                                                                       */
/*                  Language Technologies Institute                      */
/*                     Carnegie Mellon University                        */
/*                        Copyright (c) 1999                             */
/*                        All Rights Reserved.                           */
/*                                                                       */
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/*  permit persons to whom this work is furnished to do so, subject to   */
/*  the following conditions:                                            */
/*   1. The code must retain the above copyright notice, this list of    */
/*      conditions and the following disclaimer.                         */
/*   2. Any modifications must be clearly marked as such.                */
/*   3. Original authors' names are not deleted.                         */
/*   4. The authors' names are not used to endorse or promote products   */
/*      derived from this software without specific prior written        */
/*      permission.                                                      */
/*                                                                       */
/*  CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK         */
/*  DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING      */
/*  ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT   */
/*  SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE      */
/*  FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES    */
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/*  THIS SOFTWARE.                                                       */
/*                                                                       */
/*************************************************************************/
/*             Author:  Alan W Black (awb@cs.cmu.edu)                    */
/*               Date:  August 2000                                      */
/*************************************************************************/
/*                                                                       */
/*  Some File stuff                                                      */
/*                                                                       */
/*************************************************************************/
#ifndef _CST_FILE_H__
#define _CST_FILE_H__

#define CST_WRONG_FORMAT -2
#define CST_ERROR_FORMAT -1
#define CST_OK_FORMAT     0

#ifdef UNDER_CE
/* File access stuff (WinCE 2.11 is really damaged) */
#include <windows.h>
#include <winbase.h>
typedef HANDLE cst_file;
#elif __palmos__
#include <PalmOS.h>
#include <System/StdIOPalm.h>
typedef FILE * cst_file;
#else
#include <stdio.h>
typedef FILE * cst_file;
#endif

/* File mapping stuff */
#ifdef _WIN32
#include <windows.h>
typedef struct cst_filemap_struct {
    void *mem;
    cst_file fh;
    size_t mapsize;
    HANDLE h;
} cst_filemap;
#elif __palmos__
typedef struct cst_filemap_struct {
    void *mem;
    cst_file fh;
    unsigned int mapsize;
    int fd;
} cst_filemap;
#else
typedef struct cst_filemap_struct {
    void *mem;
    cst_file fh;
    size_t mapsize;
    int fd;
} cst_filemap;
#endif

#define CST_OPEN_WRITE (1<<0)
#define CST_OPEN_READ (1<<1)
#define CST_OPEN_APPEND (1<<2)
#define CST_OPEN_BINARY (1<<3)

#define CST_SEEK_ABSOLUTE 0
#define CST_SEEK_RELATIVE 1
#define CST_SEEK_ENDREL 2

cst_file cst_fopen(const char *path, int mode);
long cst_fwrite(cst_file fh, const void *buf, long size, long count);
long cst_fread(cst_file fh, void *buf, long size, long count);
int cst_fprintf(cst_file fh, char *fmt, ...);
int cst_sprintf(char *s, const char *fmt, ...);
#if defined(__palmos__)
#include <stdarg.h>
int cst_vsprintf(char *s, const char *fmt, va_list args);
#endif
int cst_fclose(cst_file fh);
int cst_fgetc(cst_file fh);

/* These aren't LFS-compliant.  I don't think we'll need >2G files. */
long cst_ftell(cst_file fh);
long cst_fseek(cst_file fh, long pos, int whence);
long cst_filesize(cst_file fh);

cst_filemap *cst_mmap_file(const char *path);
int cst_munmap_file(cst_filemap *map);

cst_filemap *cst_read_whole_file(const char *path);
int cst_free_whole_file(cst_filemap *map);

cst_filemap *cst_read_part_file(const char *path);
int cst_free_part_file(cst_filemap *map);

#endif