iowin32.c File Reference

#include <stdlib.h>
#include "zlib.h"
#include "ioapi.h"
#include "iowin32.h"

Go to the source code of this file.

Classes
struct	WIN32FILE_IOWIN

Macros
#define	INVALID_HANDLE_VALUE   (0xFFFFFFFF)
#define	INVALID_SET_FILE_POINTER   ((DWORD)-1)

Functions
voidpf ZCALLBACK win32_open_file_func	OF ((voidpf opaque, const char *filename, int mode))
uLong ZCALLBACK win32_read_file_func	OF ((voidpf opaque, voidpf stream, void *buf, uLong size))
uLong ZCALLBACK win32_write_file_func	OF ((voidpf opaque, voidpf stream, const void *buf, uLong size))
long ZCALLBACK win32_tell_file_func	OF ((voidpf opaque, voidpf stream))
long ZCALLBACK win32_seek_file_func	OF ((voidpf opaque, voidpf stream, uLong offset, int origin))
voidpf ZCALLBACK	win32_open_file_func (voidpf opaque, const char *filename, int mode)
uLong ZCALLBACK	win32_read_file_func (voidpf opaque, voidpf stream, void *buf, uLong size)
uLong ZCALLBACK	win32_write_file_func (voidpf opaque, voidpf stream, const void *buf, uLong size)
long ZCALLBACK	win32_tell_file_func (voidpf opaque, voidpf stream)
long ZCALLBACK	win32_seek_file_func (voidpf opaque, voidpf stream, uLong offset, int origin)
int ZCALLBACK	win32_close_file_func (voidpf opaque, voidpf stream)
int ZCALLBACK	win32_error_file_func (voidpf opaque, voidpf stream)
void	fill_win32_filefunc (zlib_filefunc_def *pzlib_filefunc_def)

Macro Definition Documentation

INVALID_HANDLE_VALUE

#define INVALID_HANDLE_VALUE   (0xFFFFFFFF)

Definition at line 17 of file iowin32.c.

INVALID_SET_FILE_POINTER

#define INVALID_SET_FILE_POINTER   ((DWORD)-1)

Definition at line 21 of file iowin32.c.

Function Documentation

fill_win32_filefunc()

void fill_win32_filefunc

(

zlib_filefunc_def*

pzlib_filefunc_def

)

Definition at line 259 of file iowin32.c.

{
    pzlib_filefunc_def->zopen_file = win32_open_file_func;
    pzlib_filefunc_def->zread_file = win32_read_file_func;
    pzlib_filefunc_def->zwrite_file = win32_write_file_func;
    pzlib_filefunc_def->ztell_file = win32_tell_file_func;
    pzlib_filefunc_def->zseek_file = win32_seek_file_func;
    pzlib_filefunc_def->zclose_file = win32_close_file_func;
    pzlib_filefunc_def->zerror_file = win32_error_file_func;
    pzlib_filefunc_def->opaque=NULL;
}

OF() [1/5]

voidpf ZCALLBACK win32_open_file_func OF

(

(voidpf opaque, const char *filename, int mode)

)

OF() [2/5]

uLong ZCALLBACK win32_read_file_func OF

(

(voidpf opaque, voidpf stream, void *buf, uLong size)

)

OF() [3/5]

uLong ZCALLBACK win32_write_file_func OF

(

(voidpf opaque, voidpf stream, const void *buf, uLong size)

)

OF() [4/5]

long ZCALLBACK win32_tell_file_func OF

(

(voidpf opaque, voidpf stream)

)

OF() [5/5]

long ZCALLBACK win32_seek_file_func OF

(

(voidpf opaque, voidpf stream, uLong offset, int origin)

)

win32_close_file_func()

int ZCALLBACK win32_close_file_func	(	voidpf	opaque,
		voidpf	stream
	)

Definition at line 227 of file iowin32.c.

{
    int ret=-1;

    if (stream!=NULL)
    {
        HANDLE hFile;
        hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
        if (hFile != NULL)
        {
            CloseHandle(hFile);
            ret=0;
        }
        free(stream);
    }
    return ret;
}

win32_error_file_func()

int ZCALLBACK win32_error_file_func	(	voidpf	opaque,
		voidpf	stream
	)

Definition at line 247 of file iowin32.c.

{
    int ret=-1;
    if (stream!=NULL)
    {
        ret = ((WIN32FILE_IOWIN*)stream) -> error;
    }
    return ret;
}

win32_open_file_func()

voidpf ZCALLBACK win32_open_file_func	(	voidpf	opaque,
		const char*	filename,
		int	mode
	)

Definition at line 65 of file iowin32.c.

{
    const char* mode_fopen = NULL;
    DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ;
    HANDLE hFile = 0;
    voidpf ret=NULL;

    dwDesiredAccess = dwShareMode = dwFlagsAndAttributes = 0;

    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
    {
        dwDesiredAccess = GENERIC_READ;
        dwCreationDisposition = OPEN_EXISTING;
        dwShareMode = FILE_SHARE_READ;
    }
    else
    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
    {
        dwDesiredAccess = GENERIC_WRITE | GENERIC_READ;
        dwCreationDisposition = OPEN_EXISTING;
    }
    else
    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
    {
        dwDesiredAccess = GENERIC_WRITE | GENERIC_READ;
        dwCreationDisposition = CREATE_ALWAYS;
    }

    if ((filename!=NULL) && (dwDesiredAccess != 0))
        hFile = CreateFile((LPCTSTR)filename, dwDesiredAccess, dwShareMode, NULL,
                      dwCreationDisposition, dwFlagsAndAttributes, NULL);

    if (hFile == INVALID_HANDLE_VALUE)
        hFile = NULL;

    if (hFile != NULL)
    {
        WIN32FILE_IOWIN w32fiow;
        w32fiow.hf = hFile;
        w32fiow.error = 0;
        ret = malloc(sizeof(WIN32FILE_IOWIN));
        if (ret==NULL)
            CloseHandle(hFile);
        else *((WIN32FILE_IOWIN*)ret) = w32fiow;
    }
    return ret;
}

win32_read_file_func()

uLong ZCALLBACK win32_read_file_func	(	voidpf	opaque,
		voidpf	stream,
		void*	buf,
		uLong	size
	)

Definition at line 117 of file iowin32.c.

{
    uLong ret=0;
    HANDLE hFile = NULL;
    if (stream!=NULL)
        hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
    if (hFile != NULL)
        if (!ReadFile(hFile, buf, size, &ret, NULL))
        {
            DWORD dwErr = GetLastError();
            if (dwErr == ERROR_HANDLE_EOF)
                dwErr = 0;
            ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
        }

    return ret;
}

win32_seek_file_func()

long ZCALLBACK win32_seek_file_func	(	voidpf	opaque,
		voidpf	stream,
		uLong	offset,
		int	origin
	)

Definition at line 186 of file iowin32.c.

{
    DWORD dwMoveMethod=0xFFFFFFFF;
    HANDLE hFile = NULL;

    long ret=-1;
    if (stream!=NULL)
        hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
    switch (origin)
    {
    case ZLIB_FILEFUNC_SEEK_CUR :
        dwMoveMethod = FILE_CURRENT;
        break;
    case ZLIB_FILEFUNC_SEEK_END :
        dwMoveMethod = FILE_END;
        break;
    case ZLIB_FILEFUNC_SEEK_SET :
        dwMoveMethod = FILE_BEGIN;
        break;
    default: return -1;
    }

    if (hFile != NULL)
    {
        DWORD dwSet = SetFilePointer(hFile, offset, NULL, dwMoveMethod);
        if (dwSet == INVALID_SET_FILE_POINTER)
        {
            DWORD dwErr = GetLastError();
            ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
            ret = -1;
        }
        else
            ret=0;
    }
    return ret;
}

win32_tell_file_func()

long ZCALLBACK win32_tell_file_func	(	voidpf	opaque,
		voidpf	stream
	)

Definition at line 163 of file iowin32.c.

{
    long ret=-1;
    HANDLE hFile = NULL;
    if (stream!=NULL)
        hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
    if (hFile != NULL)
    {
        DWORD dwSet = SetFilePointer(hFile, 0, NULL, FILE_CURRENT);
        if (dwSet == INVALID_SET_FILE_POINTER)
        {
            DWORD dwErr = GetLastError();
            ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
            ret = -1;
        }
        else
            ret=(long)dwSet;
    }
    return ret;
}

win32_write_file_func()

uLong ZCALLBACK win32_write_file_func	(	voidpf	opaque,
		voidpf	stream,
		const void*	buf,
		uLong	size
	)

Definition at line 140 of file iowin32.c.

{
    uLong ret=0;
    HANDLE hFile = NULL;
    if (stream!=NULL)
        hFile = ((WIN32FILE_IOWIN*)stream) -> hf;

    if (hFile !=NULL)
        if (!WriteFile(hFile, buf, size, &ret, NULL))
        {
            DWORD dwErr = GetLastError();
            if (dwErr == ERROR_HANDLE_EOF)
                dwErr = 0;
            ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
        }

    return ret;
}