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Copy pathmz_strm_posix.c
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232 lines (201 loc) · 5.62 KB
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/* mz_strm_posix.c -- Stream for filesystem access for posix/linux
Version 2.5.2, August 27, 2018
part of the MiniZip project
Copyright (C) 2010-2018 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
Modifications for Zip64 support
Copyright (C) 2009-2010 Mathias Svensson
http://result42.com
Copyright (C) 1998-2010 Gilles Vollant
http://www.winimage.com/zLibDll/minizip.html
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "mz.h"
#include "mz_strm.h"
#include "mz_strm_posix.h"
/***************************************************************************/
#if defined(MZ_FILE32_API)
# define fopen64 fopen
# define ftello64 ftell
# define fseeko64 fseek
#else
# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
defined(__OpenBSD__) || defined(__APPLE__) || defined(__ANDROID__)
# define fopen64 fopen
# define ftello64 ftello
# define fseeko64 fseeko
# endif
# ifdef _MSC_VER
# define fopen64 fopen
# if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))
# define ftello64 _ftelli64
# define fseeko64 _fseeki64
# else /* old MSC */
# define ftello64 ftell
# define fseeko64 fseek
# endif
# endif
#endif
/***************************************************************************/
static mz_stream_vtbl mz_stream_posix_vtbl = {
mz_stream_posix_open,
mz_stream_posix_is_open,
mz_stream_posix_read,
mz_stream_posix_write,
mz_stream_posix_tell,
mz_stream_posix_seek,
mz_stream_posix_close,
mz_stream_posix_error,
mz_stream_posix_create,
mz_stream_posix_delete,
NULL,
NULL
};
/***************************************************************************/
typedef struct mz_stream_posix_s
{
mz_stream stream;
int32_t error;
FILE *handle;
} mz_stream_posix;
/***************************************************************************/
int32_t mz_stream_posix_open(void *stream, const char *path, int32_t mode)
{
mz_stream_posix *posix = (mz_stream_posix *)stream;
const char *mode_fopen = NULL;
if (path == NULL)
return MZ_STREAM_ERROR;
if ((mode & MZ_OPEN_MODE_READWRITE) == MZ_OPEN_MODE_READ)
mode_fopen = "rb";
else if (mode & MZ_OPEN_MODE_APPEND)
mode_fopen = "r+b";
else if (mode & MZ_OPEN_MODE_CREATE)
mode_fopen = "wb";
else
return MZ_STREAM_ERROR;
posix->handle = fopen64(path, mode_fopen);
if (posix->handle == NULL)
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_posix_is_open(void *stream)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
if (posix->handle == NULL)
return MZ_STREAM_ERROR;
return MZ_OK;
}
int32_t mz_stream_posix_read(void *stream, void *buf, int32_t size)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
int32_t read = (int32_t)fread(buf, 1, (size_t)size, posix->handle);
if (read < size && ferror(posix->handle))
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return read;
}
int32_t mz_stream_posix_write(void *stream, const void *buf, int32_t size)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
int32_t written = (int32_t)fwrite(buf, 1, (size_t)size, posix->handle);
if (written < size && ferror(posix->handle))
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return written;
}
int64_t mz_stream_posix_tell(void *stream)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
int64_t position = ftello64(posix->handle);
if (position == -1)
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return position;
}
int32_t mz_stream_posix_seek(void *stream, int64_t offset, int32_t origin)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
int32_t fseek_origin = 0;
switch (origin)
{
case MZ_SEEK_CUR:
fseek_origin = SEEK_CUR;
break;
case MZ_SEEK_END:
fseek_origin = SEEK_END;
break;
case MZ_SEEK_SET:
fseek_origin = SEEK_SET;
break;
default:
return MZ_STREAM_ERROR;
}
if (fseeko64(posix->handle, offset, fseek_origin) != 0)
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_posix_close(void *stream)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
int32_t closed = 0;
if (posix->handle != NULL)
{
closed = fclose(posix->handle);
posix->handle = NULL;
}
if (closed != 0)
{
posix->error = errno;
return MZ_STREAM_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_posix_error(void *stream)
{
mz_stream_posix *posix = (mz_stream_posix*)stream;
return posix->error;
}
void *mz_stream_posix_create(void **stream)
{
mz_stream_posix *posix = NULL;
posix = (mz_stream_posix *)MZ_ALLOC(sizeof(mz_stream_posix));
if (posix != NULL)
{
memset(posix, 0, sizeof(mz_stream_posix));
posix->stream.vtbl = &mz_stream_posix_vtbl;
}
if (stream != NULL)
*stream = posix;
return posix;
}
void mz_stream_posix_delete(void **stream)
{
mz_stream_posix *posix = NULL;
if (stream == NULL)
return;
posix = (mz_stream_posix *)*stream;
if (posix != NULL)
MZ_FREE(posix);
*stream = NULL;
}
void *mz_stream_posix_get_interface(void)
{
return (void *)&mz_stream_posix_vtbl;
}