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ModelicaMatIO.c
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ModelicaMatIO.c
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/* ModelicaMatIO.c - MAT file I/O functions
Copyright (C) 2013-2023, Modelica Association and contributors
Copyright (C) 2015-2023, The matio contributors
Copyright (C) 2005-2014, Christopher C. Hulbert
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* This file was created by concatenation of the following C source files of the
MAT file I/O library from <http://sourceforge.net/projects/matio/>:
endian.c
inflate.c
io.c
read_data.c
mat.c
mat4.c
mat5.c
mat73.c
matvar_cell.c
matvar_struct.c
*/
/* By default v4 and v6 MAT-files are supported. The v7 and v7.3 MAT-file
formats require additional preprocessor options and third-party libraries.
The following #define's are available.
NO_FILE_SYSTEM: A file system is not present (e.g. on dSPACE or xPC).
NO_LOCALE : locale.h is not present (e.g. on AVR).
HAVE_ZLIB=1 : Enables the support of v7 MAT-files
The zlib (>= v1.2.3) library is required.
HAVE_HDF5=1 : Enables the support of v7.3 MAT-files
The hdf5 (>= v1.8) library is required.
*/
#if !defined(NO_FILE_SYSTEM)
#if defined(__gnu_linux__)
#define _GNU_SOURCE 1
#elif defined(__MINGW32__) && !defined(__USE_MINGW_ANSI_STDIO)
#define __USE_MINGW_ANSI_STDIO 1
#endif
#include <stdarg.h>
#include "ModelicaUtilities.h"
/* -------------------------------
* ---------- endian.c
* -------------------------------
*/
/** @file endian.c
* @brief Functions to handle endian specifics
*/
#include <stdlib.h>
#ifndef MATIO_PRIVATE_H
#define MATIO_PRIVATE_H
/* Extended sparse matrix data types */
/* #undef EXTENDED_SPARSE */
/* Define to 1 if you have the `fseeko' function. */
#undef HAVE_FSEEKO
/* Define to 1 if you have the `ftello' function. */
#undef HAVE_FTELLO
/* Define to 1 if you have the `fseeko64' function. */
#undef HAVE_FSEEKO64
/* Define to 1 if you have the `ftello64' function. */
#undef HAVE_FTELLO64
/* Define to 1 if you have the `_fseeki64' function. */
#if defined(_MSC_VER) && _MSC_VER >= 1400
#define HAVE__FSEEKI64 1
#else
#undef HAVE__FSEEKI64
#endif
/* Define to 1 if you have the `_ftelli64' function. */
#if defined(_MSC_VER) && _MSC_VER >= 1400
#define HAVE__FTELLI64 1
#else
#undef HAVE__FTELLI64
#endif
/* Define if 64-bit file address support in 32-bit OS. */
#undef _FILE_OFFSET_BITS
/* Define if 64-bit file address support in 32-bit OS. */
#undef _LARGEFILE64_SOURCE
/* Define to 1 if you have the <inttypes.h> header file. */
#if defined(_WIN32)
#if defined(_MSC_VER) && _MSC_VER >= 1800
#define HAVE_INTTYPES_H 1
#elif defined(__WATCOMC__) || defined(__MINGW32__) || defined(__CYGWIN__)
#define HAVE_INTTYPES_H 1
#else
#undef HAVE_INTTYPES_H
#endif
#elif defined(__GNUC__)
#define HAVE_INTTYPES_H 1
#else
#undef HAVE_INTTYPES_H
#endif
/* Define to 1 if you have the <intsafe.h> header file. */
#if defined(_MSC_VER) && _MSC_VER >= 1600
#define HAVE_INTSAFE_H 1
#else
#undef HAVE_INTSAFE_H
#endif
#if !defined(__BORLANDC__) && !defined(__LCC__) && !(defined(_MSC_VER) && _MSC_VER < 1400)
#define HAVE_SAFE_MATH 1
#else
#undef HAVE_SAFE_MATH
#endif
#if !defined(NO_LOCALE)
/* Define to 1 if you have the `localeconv' function. */
#define HAVE_LOCALECONV 1
/* Define to 1 if you have the <locale.h> header file. */
#define HAVE_LOCALE_H 1
#endif
/* Define to 1 if the system has the type `long double'. */
#if defined(_WIN32)
#if defined(__WATCOMC__) || (defined(_MSC_VER) && _MSC_VER >= 1300)
#define HAVE_LONG_DOUBLE 1
#endif
#endif
#if defined(__GNUC__)
#define HAVE_LONG_DOUBLE 1
#endif
/* Define to 1 if the system has the type `long long int'. */
#if defined(_WIN32)
#if defined(__WATCOMC__) || (defined(_MSC_VER) && _MSC_VER >= 1300)
#define HAVE_LONG_LONG_INT 1
#endif
#endif
#if defined(__GNUC__) && __STDC_VERSION__ >= 199901L
#define HAVE_LONG_LONG_INT 1
#endif
/* Define to 1 if the system has the type `ptrdiff_t'. */
#define HAVE_PTRDIFF_T 1
/* Define to 1 if you have a C99 compliant `snprintf' function. */
#if defined(STDC99)
#define HAVE_SNPRINTF 1
#elif defined(__MINGW32__) || defined(__CYGWIN__)
#if __STDC_VERSION__ >= 199901L
#define HAVE_SNPRINTF 1
#endif
#elif defined(__WATCOMC__)
#define HAVE_SNPRINTF 1
#elif defined(__TURBOC__) && __TURBOC__ >= 0x550
#define HAVE_SNPRINTF 1
#elif defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
#define HAVE_SNPRINTF 1
#elif defined(_MSC_VER) && _MSC_VER >= 1900
#define HAVE_SNPRINTF 1
#else
#undef HAVE_SNPRINTF
#endif
/* Define to 1 if you have the <stdarg.h> header file. */
#define HAVE_STDARG_H 1
/* Define to 1 if you have the <stddef.h> header file. */
#define HAVE_STDDEF_H 1
/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1
/* Define to 1 if `decimal_point' is member of `struct lconv'. */
#define HAVE_STRUCT_LCONV_DECIMAL_POINT 1
/* Define to 1 if `thousands_sep' is member of `struct lconv'. */
#define HAVE_STRUCT_LCONV_THOUSANDS_SEP 1
/* Define to 1 if the system has the type `unsigned long long int'. */
#if defined(_WIN32)
#if defined(__WATCOMC__) || (defined(_MSC_VER) && _MSC_VER >= 1300)
#define HAVE_UNSIGNED_LONG_LONG_INT 1
#endif
#endif
#if defined(__GNUC__) && __STDC_VERSION__ >= 199901L
#define HAVE_UNSIGNED_LONG_LONG_INT 1
#endif
/* Define to 1 if you have the `va_copy' function or macro. */
#if defined(__GNUC__) && __STDC_VERSION__ >= 199901L
#define HAVE_VA_COPY 1
#elif defined(_MSC_VER) && _MSC_VER >= 1800
#define HAVE_VA_COPY 1
#elif defined(__WATCOMC__)
#define HAVE_VA_COPY 1
#else
#undef HAVE_VA_COPY
#endif
/* Define to 1 if you have the `__va_copy' function or macro. */
#if defined(__GNUC__)
#define HAVE___VA_COPY 1
#elif defined(__WATCOMC__)
#define HAVE___VA_COPY 1
#else
#undef HAVE___VA_COPY
#endif
/* Platform */
#if defined(_MSC_VER) && defined(_WIN64)
#define MATIO_PLATFORM "x86_64-pc-windows"
#elif defined(_MSC_VER) && defined(_WIN32)
#define MATIO_PLATFORM "i686-pc-windows"
#else
#define MATIO_PLATFORM "UNKNOWN"
#endif
/* Fixed types in safe-math.h disabled */
#define PSNIP_SAFE_NO_FIXED 1
/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1
/* Z prefix */
#undef Z_PREFIX
#include "ModelicaMatIO.h"
#if HAVE_SAFE_MATH
#include "safe-math.h"
#endif
#include <limits.h>
#include <math.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#if defined(__GLIBC__)
#include <endian.h>
#endif
#if HAVE_INTTYPES_H
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#endif
#if defined(__BORLANDC__) || defined(__MINGW32__) || defined(_MSC_VER)
#define mat_off_t __int64
#if defined(_MSC_VER) && defined(HAVE__FSEEKI64) && defined(HAVE__FTELLI64)
#define MATIO_LFS
#define fseeko _fseeki64
#define ftello _ftelli64
#elif defined(__BORLANDC__) && defined(HAVE__FSEEKI64) && defined(HAVE__FTELLI64)
#define MATIO_LFS
#define fseeko _fseeki64
#define ftello _ftelli64
#elif !defined(HAVE_FSEEKO) && !defined(HAVE_FTELLO) && defined(HAVE_FSEEKO64) && \
defined(HAVE_FTELLO64)
#define MATIO_LFS
#define fseeko fseeko64
#define ftello ftello64
#endif
#elif defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(HAVE_FSEEKO) && \
defined(HAVE_FTELLO)
#define MATIO_LFS
#define mat_off_t off_t
#endif
#if !defined(MATIO_LFS)
#define mat_off_t long
#define ftello ftell
#define fseeko fseek
#endif
#if HAVE_ZLIB
#define ZLIB_BYTE_PTR(a) ((Bytef *)(a))
#include <zlib.h>
#endif
#if HAVE_HDF5
#include <hdf5.h>
#endif
#if ( defined(_WIN64) || defined(_WIN32) ) && !defined(__CYGWIN__)
#include <io.h>
#endif
#if defined(_MSC_VER) || defined(__MINGW32__)
#define SIZE_T_FMTSTR "Iu"
#else
#define SIZE_T_FMTSTR "zu"
#endif
#ifndef INT32_MAX
#define INT32_MAX INT_MAX
#endif
#ifndef UINT32_MAX
#ifdef UINT_MAX
#define UINT32_MAX UINT_MAX
#else
#define UINT32_MAX INT_MAX
#endif
#endif
#if !defined(READ_BLOCK_SIZE)
#define READ_BLOCK_SIZE (8192)
#endif
#define CAT_(X, Y) X##Y
#define CAT(X, Y) CAT_(X, Y)
/** @if mat_devman
* @brief Matlab MAT File information
*
* Contains information about a Matlab MAT file
* @ingroup mat_internal
* @endif
*/
struct _mat_t
{
void *fp; /**< File pointer for the MAT file */
char *header; /**< MAT file header string */
char *subsys_offset; /**< Offset */
char *filename; /**< Filename of the MAT file */
int version; /**< MAT file version */
int byteswap; /**< 1 if byte swapping is required, 0 otherwise */
int mode; /**< Access mode */
mat_off_t bof; /**< Beginning of file not including any header */
size_t next_index; /**< Index/File position of next variable to read */
size_t num_datasets; /**< Number of datasets in the file */
#if HAVE_HDF5
hid_t refs_id; /**< Id of the /#refs# group in HDF5 */
#endif
char **dir; /**< Names of the datasets in the file */
};
/** @if mat_devman
* @brief internal structure for MAT variables
* @ingroup mat_internal
* @endif
*/
struct matvar_internal
{
#if HAVE_HDF5
hobj_ref_t hdf5_ref; /**< Reference */
hid_t id; /**< Id */
#endif
mat_off_t datapos; /**< Offset from the beginning of the MAT file to the data */
unsigned num_fields; /**< Number of fields */
char **fieldnames; /**< Pointer to fieldnames */
#if HAVE_ZLIB
z_streamp z; /**< zlib compression state */
void *data; /**< Inflated data array */
#endif
};
/* snprintf.c */
#if !HAVE_SNPRINTF
int rpl_snprintf(char *, size_t, const char *, ...);
#define mat_snprintf rpl_snprintf
#else
#define mat_snprintf snprintf
#endif /* !HAVE_SNPRINTF */
/* endian.c */
static double Mat_doubleSwap(double *a);
static float Mat_floatSwap(float *a);
#ifdef HAVE_MATIO_INT64_T
static mat_int64_t Mat_int64Swap(mat_int64_t *a);
#endif /* HAVE_MATIO_INT64_T */
#ifdef HAVE_MATIO_UINT64_T
static mat_uint64_t Mat_uint64Swap(mat_uint64_t *a);
#endif /* HAVE_MATIO_UINT64_T */
static mat_int32_t Mat_int32Swap(mat_int32_t *a);
static mat_uint32_t Mat_uint32Swap(mat_uint32_t *a);
static mat_int16_t Mat_int16Swap(mat_int16_t *a);
static mat_uint16_t Mat_uint16Swap(mat_uint16_t *a);
/* read_data.c */
static size_t ReadDoubleData(mat_t *mat, double *data, enum matio_types data_type, size_t len);
static size_t ReadSingleData(mat_t *mat, float *data, enum matio_types data_type, size_t len);
#ifdef HAVE_MATIO_INT64_T
static size_t ReadInt64Data(mat_t *mat, mat_int64_t *data, enum matio_types data_type, size_t len);
#endif /* HAVE_MATIO_INT64_T */
#ifdef HAVE_MATIO_UINT64_T
static size_t ReadUInt64Data(mat_t *mat, mat_uint64_t *data, enum matio_types data_type,
size_t len);
#endif /* HAVE_MATIO_UINT64_T */
static size_t ReadInt32Data(mat_t *mat, mat_int32_t *data, enum matio_types data_type, size_t len);
static size_t ReadUInt32Data(mat_t *mat, mat_uint32_t *data, enum matio_types data_type,
size_t len);
static size_t ReadInt16Data(mat_t *mat, mat_int16_t *data, enum matio_types data_type, size_t len);
static size_t ReadUInt16Data(mat_t *mat, mat_uint16_t *data, enum matio_types data_type,
size_t len);
static size_t ReadInt8Data(mat_t *mat, mat_int8_t *data, enum matio_types data_type, size_t len);
static size_t ReadUInt8Data(mat_t *mat, mat_uint8_t *data, enum matio_types data_type, size_t len);
static size_t ReadCharData(mat_t *mat, void *_data, enum matio_types data_type, size_t len);
static int ReadDataSlab1(mat_t *mat, void *data, enum matio_classes class_type,
enum matio_types data_type, int start, int stride, int edge);
static int ReadDataSlab2(mat_t *mat, void *data, enum matio_classes class_type,
enum matio_types data_type, size_t *dims, int *start, int *stride,
int *edge);
static int ReadDataSlabN(mat_t *mat, void *data, enum matio_classes class_type,
enum matio_types data_type, int rank, size_t *dims, int *start,
int *stride, int *edge);
#if HAVE_ZLIB
static int ReadCompressedDoubleData(mat_t *mat, z_streamp z, double *data,
enum matio_types data_type, int len);
static int ReadCompressedSingleData(mat_t *mat, z_streamp z, float *data,
enum matio_types data_type, int len);
#ifdef HAVE_MATIO_INT64_T
static int ReadCompressedInt64Data(mat_t *mat, z_streamp z, mat_int64_t *data,
enum matio_types data_type, int len);
#endif /* HAVE_MATIO_INT64_T */
#ifdef HAVE_MATIO_UINT64_T
static int ReadCompressedUInt64Data(mat_t *mat, z_streamp z, mat_uint64_t *data,
enum matio_types data_type, int len);
#endif /* HAVE_MATIO_UINT64_T */
static int ReadCompressedInt32Data(mat_t *mat, z_streamp z, mat_int32_t *data,
enum matio_types data_type, int len);
static int ReadCompressedUInt32Data(mat_t *mat, z_streamp z, mat_uint32_t *data,
enum matio_types data_type, int len);
static int ReadCompressedInt16Data(mat_t *mat, z_streamp z, mat_int16_t *data,
enum matio_types data_type, int len);
static int ReadCompressedUInt16Data(mat_t *mat, z_streamp z, mat_uint16_t *data,
enum matio_types data_type, int len);
static int ReadCompressedInt8Data(mat_t *mat, z_streamp z, mat_int8_t *data,
enum matio_types data_type, int len);
static int ReadCompressedUInt8Data(mat_t *mat, z_streamp z, mat_uint8_t *data,
enum matio_types data_type, int len);
static int ReadCompressedCharData(mat_t *mat, z_streamp z, void *data, enum matio_types data_type,
size_t len);
static int ReadCompressedDataSlab1(mat_t *mat, z_streamp z, void *data,
enum matio_classes class_type, enum matio_types data_type,
int start, int stride, int edge);
static int ReadCompressedDataSlab2(mat_t *mat, z_streamp z, void *data,
enum matio_classes class_type, enum matio_types data_type,
size_t *dims, int *start, int *stride, int *edge);
static int ReadCompressedDataSlabN(mat_t *mat, z_streamp z, void *data,
enum matio_classes class_type, enum matio_types data_type,
int rank, size_t *dims, int *start, int *stride, int *edge);
/* inflate.c */
static int InflateSkip(mat_t *mat, z_streamp z, int nBytes, size_t *bytesread);
static int InflateSkipData(mat_t *mat, z_streamp z, enum matio_types data_type, int len);
static int InflateRankDims(mat_t *mat, z_streamp z, void *buf, size_t nBytes, mat_uint32_t **dims,
size_t *bytesread);
static int Inflate(mat_t *mat, z_streamp z, void *buf, unsigned int nBytes, size_t *bytesread);
static int InflateData(mat_t *mat, z_streamp z, void *buf, unsigned int nBytes);
#endif
/* mat.c */
static mat_complex_split_t *ComplexMalloc(size_t nbytes);
static void ComplexFree(mat_complex_split_t *complex_data);
static enum matio_types ClassType2DataType(enum matio_classes class_type);
static int Add(size_t *res, size_t a, size_t b);
static int Mul(size_t *res, size_t a, size_t b);
static int Mat_MulDims(const matvar_t *matvar, size_t *nelems);
static int Read(void *buf, size_t size, size_t count, FILE *fp, size_t *bytesread);
static int IsEndOfFile(FILE *fp, mat_off_t *fpos);
static int CheckSeekFile(FILE *fp, mat_off_t offset);
/* io.c */
#if defined(_WIN32) && defined(_MSC_VER)
static wchar_t *utf82u(const char *src);
#endif
#endif
/** @brief swap the bytes @c a and @c b
* @ingroup mat_internal
*/
#define swap(a, b) \
a ^= b; \
b ^= a; \
a ^= b
#ifdef HAVE_MATIO_INT64_T
/** @brief swap the bytes of a 64-bit signed integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_int64_t
Mat_int64Swap(mat_int64_t *a)
{
union {
mat_int8_t i1[8];
mat_int64_t i8;
} tmp;
tmp.i8 = *a;
swap(tmp.i1[0], tmp.i1[7]);
swap(tmp.i1[1], tmp.i1[6]);
swap(tmp.i1[2], tmp.i1[5]);
swap(tmp.i1[3], tmp.i1[4]);
*a = tmp.i8;
return *a;
}
#endif /* HAVE_MATIO_INT64_T */
#ifdef HAVE_MATIO_UINT64_T
/** @brief swap the bytes of a 64-bit unsigned integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_uint64_t
Mat_uint64Swap(mat_uint64_t *a)
{
union {
mat_uint8_t i1[8];
mat_uint64_t i8;
} tmp;
tmp.i8 = *a;
swap(tmp.i1[0], tmp.i1[7]);
swap(tmp.i1[1], tmp.i1[6]);
swap(tmp.i1[2], tmp.i1[5]);
swap(tmp.i1[3], tmp.i1[4]);
*a = tmp.i8;
return *a;
}
#endif /* HAVE_MATIO_UINT64_T */
/** @brief swap the bytes of a 32-bit signed integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_int32_t
Mat_int32Swap(mat_int32_t *a)
{
union {
mat_int8_t i1[4];
mat_int32_t i4;
} tmp;
tmp.i4 = *a;
swap(tmp.i1[0], tmp.i1[3]);
swap(tmp.i1[1], tmp.i1[2]);
*a = tmp.i4;
return *a;
}
/** @brief swap the bytes of a 32-bit unsigned integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_uint32_t
Mat_uint32Swap(mat_uint32_t *a)
{
union {
mat_uint8_t i1[4];
mat_uint32_t i4;
} tmp;
tmp.i4 = *a;
swap(tmp.i1[0], tmp.i1[3]);
swap(tmp.i1[1], tmp.i1[2]);
*a = tmp.i4;
return *a;
}
/** @brief swap the bytes of a 16-bit signed integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_int16_t
Mat_int16Swap(mat_int16_t *a)
{
union {
mat_int8_t i1[2];
mat_int16_t i2;
} tmp;
tmp.i2 = *a;
swap(tmp.i1[0], tmp.i1[1]);
*a = tmp.i2;
return *a;
}
/** @brief swap the bytes of a 16-bit unsigned integer
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static mat_uint16_t
Mat_uint16Swap(mat_uint16_t *a)
{
union {
mat_uint8_t i1[2];
mat_uint16_t i2;
} tmp;
tmp.i2 = *a;
swap(tmp.i1[0], tmp.i1[1]);
*a = tmp.i2;
return *a;
}
/** @brief swap the bytes of a 4 byte single-precision float
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static float
Mat_floatSwap(float *a)
{
union {
char i1[4];
float r4;
} tmp;
tmp.r4 = *a;
swap(tmp.i1[0], tmp.i1[3]);
swap(tmp.i1[1], tmp.i1[2]);
*a = tmp.r4;
return *a;
}
/** @brief swap the bytes of a 4 or 8 byte double-precision float
* @ingroup mat_internal
* @param a pointer to integer to swap
* @return the swapped integer
*/
static double
Mat_doubleSwap(double *a)
{
#ifndef SIZEOF_DOUBLE
#define SIZEOF_DOUBLE 8
#endif
union {
char a[SIZEOF_DOUBLE];
double b;
} tmp;
tmp.b = *a;
#if SIZEOF_DOUBLE == 4
swap(tmp.a[0], tmp.a[3]);
swap(tmp.a[1], tmp.a[2]);
#elif SIZEOF_DOUBLE == 8
swap(tmp.a[0], tmp.a[7]);
swap(tmp.a[1], tmp.a[6]);
swap(tmp.a[2], tmp.a[5]);
swap(tmp.a[3], tmp.a[4]);
#elif SIZEOF_DOUBLE == 16
swap(tmp.a[0], tmp.a[15]);
swap(tmp.a[1], tmp.a[14]);
swap(tmp.a[2], tmp.a[13]);
swap(tmp.a[3], tmp.a[12]);
swap(tmp.a[4], tmp.a[11]);
swap(tmp.a[5], tmp.a[10]);
swap(tmp.a[6], tmp.a[9]);
swap(tmp.a[7], tmp.a[8]);
#endif
*a = tmp.b;
return *a;
}
/* -------------------------------
* ---------- inflate.c
* -------------------------------
*/
/** @file inflate.c
* @brief Functions to inflate data/tags
* @ingroup MAT
*/
#if HAVE_ZLIB
/** @cond mat_devman */
/** @brief Inflate the data until @c nBytes of uncompressed data has been
* inflated
*
* @ingroup mat_internal
* @param mat Pointer to the MAT file
* @param z zlib compression stream
* @param nBytes Number of uncompressed bytes to skip
* @param[out] bytesread Number of bytes read from the file
* @retval 0 on success
*/
static int
InflateSkip(mat_t *mat, z_streamp z, int nBytes, size_t *bytesread)
{
mat_uint8_t comp_buf[READ_BLOCK_SIZE], uncomp_buf[READ_BLOCK_SIZE];
int n, err = MATIO_E_NO_ERROR, cnt = 0;
if ( nBytes < 1 )
return MATIO_E_NO_ERROR;
n = nBytes < READ_BLOCK_SIZE ? nBytes : READ_BLOCK_SIZE;
if ( !z->avail_in ) {
size_t nbytes = fread(comp_buf, 1, n, (FILE *)mat->fp);
if ( 0 == nbytes ) {
return err;
}
if ( NULL != bytesread ) {
*bytesread += nbytes;
}
z->avail_in = (uInt)nbytes;
z->next_in = comp_buf;
}
z->avail_out = n;
z->next_out = uncomp_buf;
err = inflate(z, Z_FULL_FLUSH);
if ( err == Z_STREAM_END ) {
return MATIO_E_NO_ERROR;
} else if ( err != Z_OK ) {
Mat_Critical("InflateSkip: inflate returned %s",
zError(err == Z_NEED_DICT ? Z_DATA_ERROR : err));
return MATIO_E_FILE_FORMAT_VIOLATION;
} else {
err = MATIO_E_NO_ERROR;
}
if ( !z->avail_out ) {
cnt += n;
n = nBytes - cnt;
if ( n > READ_BLOCK_SIZE ) {
n = READ_BLOCK_SIZE;
}
z->avail_out = n;
z->next_out = uncomp_buf;
}
while ( cnt < nBytes ) {
if ( !z->avail_in ) {
size_t nbytes = fread(comp_buf, 1, n, (FILE *)mat->fp);
if ( 0 == nbytes ) {
break;
}
if ( NULL != bytesread ) {
*bytesread += nbytes;
}
z->avail_in = (uInt)nbytes;
z->next_in = comp_buf;
}
err = inflate(z, Z_FULL_FLUSH);
if ( err == Z_STREAM_END ) {
err = MATIO_E_NO_ERROR;
break;
} else if ( err != Z_OK ) {
const char *errMsg = zError(err == Z_NEED_DICT ? Z_DATA_ERROR : err);
err = MATIO_E_FILE_FORMAT_VIOLATION;
Mat_Critical("InflateSkip: inflate returned %s", errMsg);
break;
} else {
err = MATIO_E_NO_ERROR;
}
if ( !z->avail_out ) {
cnt += n;
n = nBytes - cnt;
if ( n > READ_BLOCK_SIZE ) {
n = READ_BLOCK_SIZE;
}
z->avail_out = n;
z->next_out = uncomp_buf;
}
}
if ( z->avail_in ) {
const mat_off_t offset = -(mat_off_t)z->avail_in;
(void)fseeko((FILE *)mat->fp, offset, SEEK_CUR);
if ( NULL != bytesread ) {
*bytesread -= z->avail_in;
}
z->avail_in = 0;
}
return err;
}
/** @brief Inflate the data until @c len elements of compressed data with data
* type @c data_type has been inflated
*
* @ingroup mat_internal
* @param mat Pointer to the MAT file
* @param z zlib compression stream
* @param data_type Data type (matio_types enumerations)
* @param len Number of elements of datatype @c data_type to skip
* @retval 0 on success
*/
static int
InflateSkipData(mat_t *mat, z_streamp z, enum matio_types data_type, int len)
{
if ( mat == NULL || z == NULL || len < 1 )
return MATIO_E_BAD_ARGUMENT;
switch ( data_type ) {
case MAT_T_UTF8:
case MAT_T_UTF16:
case MAT_T_UTF32:
return MATIO_E_OPERATION_NOT_SUPPORTED;
default:
break;
}
return InflateSkip(mat, z, (unsigned int)Mat_SizeOf(data_type) * len, NULL);
}
/** @brief Inflates the dimensions tag and the dimensions data
*
* @c buf must hold at least (8+4*rank) bytes where rank is the number of
* dimensions. If the end of the dimensions data is not aligned on an 8-byte
* boundary, this function eats up those bytes and stores then in @c buf.
* @ingroup mat_internal
* @param mat Pointer to the MAT file
* @param z zlib compression stream
* @param buf Pointer to store the dimensions flag and data
* @param nBytes Size of buf in bytes
* @param dims Output buffer to be allocated if (8+4*rank) > nBytes
* @param[out] bytesread Number of bytes read from the file
* @retval 0 on success
*/
static int
InflateRankDims(mat_t *mat, z_streamp z, void *buf, size_t nBytes, mat_uint32_t **dims,
size_t *bytesread)
{
mat_uint32_t tag[2];
mat_uint32_t rank, i;
int err;
size_t nbytes = 0;
if ( buf == NULL )
return MATIO_E_BAD_ARGUMENT;
err = Inflate(mat, z, buf, 8, bytesread);
if ( err ) {
return err;
}
tag[0] = *(mat_uint32_t *)buf;
tag[1] = *((mat_uint32_t *)buf + 1);
if ( mat->byteswap ) {
Mat_uint32Swap(tag);
Mat_uint32Swap(tag + 1);
}
if ( (tag[0] & 0x0000ffff) != MAT_T_INT32 ) {
Mat_Critical("InflateRankDims: Reading dimensions expected type MAT_T_INT32");
return MATIO_E_FILE_FORMAT_VIOLATION;
}
rank = tag[1];
if ( rank % 8 != 0 )
i = 8 - (rank % 8);
else
i = 0;
if ( rank > INT_MAX - i - 2 ) {
Mat_Critical("InflateRankDims: Reading dimensions expected rank in integer range");
return MATIO_E_FILE_FORMAT_VIOLATION;
}
rank += i;
err = Mul(&nbytes, rank + 2, sizeof(mat_uint32_t));
if ( err ) {
Mat_Critical("Integer multiplication overflow");
return err;
}
if ( nbytes <= nBytes ) {
err = Inflate(mat, z, (mat_uint32_t *)buf + 2, rank, bytesread);
} else {
/* Cannot use too small buf, but can allocate output buffer dims */
*dims = (mat_uint32_t *)calloc(rank, sizeof(mat_uint32_t));
if ( NULL != *dims ) {
err = Inflate(mat, z, *dims, rank, bytesread);
} else {
*((mat_uint32_t *)buf + 1) = 0;
Mat_Critical("Error allocating memory for dims");
return MATIO_E_OUT_OF_MEMORY;
}
}
return err;
}
/** @brief Inflates the data
*
* buf must hold at least @c nBytes bytes
* @ingroup mat_internal
* @param mat Pointer to the MAT file
* @param z zlib compression stream
* @param buf Pointer to store the uncompressed data
* @param nBytes Number of uncompressed bytes to inflate
* @param[out] bytesread Number of bytes read from the file
* @retval 0 on success
*/
static int
Inflate(mat_t *mat, z_streamp z, void *buf, unsigned int nBytes, size_t *bytesread)
{
mat_uint8_t comp_buf[4];
int err = MATIO_E_NO_ERROR;
if ( buf == NULL )
return MATIO_E_BAD_ARGUMENT;
if ( !z->avail_in ) {
size_t nbytes = fread(comp_buf, 1, 1, (FILE *)mat->fp);
if ( 0 == nbytes ) {
return err;
}
if ( NULL != bytesread ) {
*bytesread += nbytes;
}
z->avail_in = (uInt)nbytes;
z->next_in = comp_buf;
}
z->avail_out = nBytes;
z->next_out = ZLIB_BYTE_PTR(buf);
err = inflate(z, Z_NO_FLUSH);
if ( err != Z_OK ) {
Mat_Critical("Inflate: inflate returned %s",
zError(err == Z_NEED_DICT ? Z_DATA_ERROR : err));
return MATIO_E_FILE_FORMAT_VIOLATION;
} else {
err = MATIO_E_NO_ERROR;
}
while ( z->avail_out && !z->avail_in ) {
size_t nbytes = fread(comp_buf, 1, 1, (FILE *)mat->fp);
if ( 0 == nbytes ) {
break;
}
if ( NULL != bytesread ) {
*bytesread += nbytes;
}
z->avail_in = (uInt)nbytes;
z->next_in = comp_buf;
err = inflate(z, Z_NO_FLUSH);
if ( err != Z_OK ) {
Mat_Critical("Inflate: inflate returned %s",
zError(err == Z_NEED_DICT ? Z_DATA_ERROR : err));
return MATIO_E_FILE_FORMAT_VIOLATION;
} else {
err = MATIO_E_NO_ERROR;
}
}