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#include "../precomp.hpp"
#if defined(ENABLE_TORCH_IMPORTER) && ENABLE_TORCH_IMPORTER
#include "THGeneral.h"
#include "THDiskFile.h"
#include "THFilePrivate.h"
namespace TH
{
typedef struct THDiskFile__
{
THFile file;
FILE *handle;
char *name;
int isNativeEncoding;
int longSize;
} THDiskFile;
static int THDiskFile_isOpened(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)self;
return (dfself->handle != NULL);
}
const char *THDiskFile_name(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)self;
return dfself->name;
}
/* workaround mac osx lion ***insane*** fread bug */
#ifdef __APPLE__
static size_t fread__(void *ptr, size_t size, size_t nitems, FILE *stream)
{
size_t nread = 0;
while(!feof(stream) && !ferror(stream) && (nread < nitems))
nread += fread((char*)ptr+nread*size, size, std::min<size_t>(2147483648UL/size, nitems-nread), stream);
return nread;
}
#else
#define fread__ fread
#endif
#define READ_WRITE_METHODS(TYPE, TYPEC, ASCII_READ_ELEM, ASCII_WRITE_ELEM) \
static long THDiskFile_read##TYPEC(THFile *self, TYPE *data, long n) \
{ \
THDiskFile *dfself = (THDiskFile*)(self); \
long nread = 0L; \
\
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file"); \
THArgCheck(dfself->file.isReadable, 1, "attempt to read in a write-only file"); \
\
if(dfself->file.isBinary) \
{ \
nread = fread__(data, sizeof(TYPE), n, dfself->handle); \
if(!dfself->isNativeEncoding && (sizeof(TYPE) > 1) && (nread > 0)) \
THDiskFile_reverseMemory(data, data, sizeof(TYPE), nread); \
} \
else \
{ \
long i; \
for(i = 0; i < n; i++) \
{ \
ASCII_READ_ELEM; /* increment here result and break if wrong */ \
} \
if(dfself->file.isAutoSpacing && (n > 0)) \
{ \
int c = fgetc(dfself->handle); \
if( (c != '\n') && (c != EOF) ) \
ungetc(c, dfself->handle); \
} \
} \
\
if(nread != n) \
{ \
dfself->file.hasError = 1; /* shouldn't we put hasError to 0 all the time ? */ \
if(!dfself->file.isQuiet) \
THError("read error: read %d blocks instead of %d", nread, n); \
} \
\
return nread; \
}
static int THDiskFile_mode(const char *mode, int *isReadable, int *isWritable)
{
*isReadable = 0;
*isWritable = 0;
if(strlen(mode) == 1)
{
if(*mode == 'r')
{
*isReadable = 1;
return 1;
}
else if(*mode == 'w')
{
*isWritable = 1;
return 1;
}
}
else if(strlen(mode) == 2)
{
if(mode[0] == 'r' && mode[1] == 'w')
{
*isReadable = 1;
*isWritable = 1;
return 1;
}
}
return 0;
}
static void THDiskFile_seek(THFile *self, long position)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
#if defined(_WIN64)
if(_fseeki64(dfself->handle, (__int64)position, SEEK_SET) < 0)
#elif defined(_WIN32)
if(fseek(dfself->handle, (long)position, SEEK_SET) < 0)
#else
if(fseeko(dfself->handle, (off_t)position, SEEK_SET) < 0)
#endif
{
dfself->file.hasError = 1;
if(!dfself->file.isQuiet)
THError("unable to seek at position %d", position);
}
}
static void THDiskFile_seekEnd(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
#if defined(_WIN64)
if(_fseeki64(dfself->handle, 0L, SEEK_END) < 0)
#elif defined(_WIN32)
if(fseek(dfself->handle, 0L, SEEK_END) < 0)
#else
if(fseeko(dfself->handle, 0L, SEEK_END) < 0)
#endif
{
dfself->file.hasError = 1;
if(!dfself->file.isQuiet)
THError("unable to seek at end of file");
}
}
static long THDiskFile_position(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
#if defined(_WIN64)
__int64 offset = _ftelli64(dfself->handle);
#elif defined(_WIN32)
long offset = ftell(dfself->handle);
#else
off_t offset = ftello(dfself->handle);
#endif
if (offset > -1)
return (long)offset;
else if(!dfself->file.isQuiet)
THError("unable to obtain disk file offset (maybe a long overflow occurred)");
return 0;
}
static void THDiskFile_close(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
fclose(dfself->handle);
dfself->handle = NULL;
}
/* Little and Big Endian */
static void THDiskFile_reverseMemory(void *dst, const void *src, long blockSize, long numBlocks)
{
if(blockSize != 1)
{
long halfBlockSize = blockSize/2;
char *charSrc = (char*)src;
char *charDst = (char*)dst;
long b, i;
for(b = 0; b < numBlocks; b++)
{
for(i = 0; i < halfBlockSize; i++)
{
char z = charSrc[i];
charDst[i] = charSrc[blockSize-1-i];
charDst[blockSize-1-i] = z;
}
charSrc += blockSize;
charDst += blockSize;
}
}
}
int THDiskFile_isLittleEndianCPU(void)
{
int x = 7;
char *ptr = (char *)&x;
if(ptr[0] == 0)
return 0;
else
return 1;
}
int THDiskFile_isBigEndianCPU(void)
{
return(!THDiskFile_isLittleEndianCPU());
}
void THDiskFile_nativeEndianEncoding(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
dfself->isNativeEncoding = 1;
}
void THDiskFile_littleEndianEncoding(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
dfself->isNativeEncoding = THDiskFile_isLittleEndianCPU();
}
void THDiskFile_bigEndianEncoding(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
dfself->isNativeEncoding = !THDiskFile_isLittleEndianCPU();
}
/* End of Little and Big Endian Stuff */
void THDiskFile_longSize(THFile *self, int size)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
THArgCheck(size == 0 || size == 4 || size == 8, 1, "Invalid long size specified");
dfself->longSize = size;
}
void THDiskFile_noBuffer(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
if (setvbuf(dfself->handle, NULL, _IONBF, 0)) {
THError("error: cannot disable buffer");
}
}
static void THDiskFile_free(THFile *self)
{
THDiskFile *dfself = (THDiskFile*)(self);
if(dfself->handle)
fclose(dfself->handle);
THFree(dfself->name);
THFree(dfself);
}
/* Note that we do a trick */
READ_WRITE_METHODS(unsigned char, Byte,
nread = fread(data, 1, n, dfself->handle); break,
nwrite = fwrite(data, 1, n, dfself->handle); break)
READ_WRITE_METHODS(char, Char,
nread = fread(data, 1, n, dfself->handle); break,
nwrite = fwrite(data, 1, n, dfself->handle); break)
READ_WRITE_METHODS(short, Short,
int ret = fscanf(dfself->handle, "%hd", &data[i]); if(ret <= 0) break; else nread++,
int ret = fprintf(dfself->handle, "%hd", data[i]); if(ret <= 0) break; else nwrite++)
READ_WRITE_METHODS(int, Int,
int ret = fscanf(dfself->handle, "%d\n\r", &data[i]); if(ret <= 0) break; else nread++,
int ret = fprintf(dfself->handle, "%d", data[i]); if(ret <= 0) break; else nwrite++)
/*READ_WRITE_METHODS(long, Long,
int ret = fscanf(dfself->handle, "%ld", &data[i]); if(ret <= 0) break; else nread++,
int ret = fprintf(dfself->handle, "%ld", data[i]); if(ret <= 0) break; else nwrite++)*/
READ_WRITE_METHODS(float, Float,
int ret = fscanf(dfself->handle, "%g", &data[i]); if(ret <= 0) break; else nread++,
int ret = fprintf(dfself->handle, "%.9g", data[i]); if(ret <= 0) break; else nwrite++)
READ_WRITE_METHODS(double, Double,
int ret = fscanf(dfself->handle, "%lg", &data[i]); if(ret <= 0) break; else nread++,
int ret = fprintf(dfself->handle, "%.17g", data[i]); if(ret <= 0) break; else nwrite++)
/* For Long we need to rewrite everything, because of the special management of longSize */
static long THDiskFile_readLong(THFile *self, int64 *data, long n)
{
THDiskFile *dfself = (THDiskFile*)(self);
long nread = 0L;
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
THArgCheck(dfself->file.isReadable, 1, "attempt to read in a write-only file");
if(dfself->file.isBinary)
{
if(dfself->longSize == 0 || dfself->longSize == sizeof(int64))
{
nread = fread__(data, sizeof(int64), n, dfself->handle);
if(!dfself->isNativeEncoding && (sizeof(int64) > 1) && (nread > 0))
THDiskFile_reverseMemory(data, data, sizeof(int64), nread);
} else if(dfself->longSize == 4)
{
nread = fread__(data, 4, n, dfself->handle);
if(!dfself->isNativeEncoding && (nread > 0))
THDiskFile_reverseMemory(data, data, 4, nread);
long i;
for(i = nread; i > 0; i--)
data[i-1] = ((int *)data)[i-1];
}
else /* if(dfself->longSize == 8) */
{
int big_endian = !THDiskFile_isLittleEndianCPU();
int32_t *buffer = (int32_t*)THAlloc(8*n);
if (!buffer)
THError("can not allocate buffer");
nread = fread__(buffer, 8, n, dfself->handle);
long i;
for(i = nread; i > 0; i--)
data[i-1] = buffer[2*(i-1) + big_endian];
THFree(buffer);
if(!dfself->isNativeEncoding && (nread > 0))
THDiskFile_reverseMemory(data, data, 4, nread);
}
}
else
{
long i;
for(i = 0; i < n; i++)
{
long d;
int ret = fscanf(dfself->handle, "%ld", &d); if(ret <= 0) break; else nread++;
data[i] = d;
}
if(dfself->file.isAutoSpacing && (n > 0))
{
int c = fgetc(dfself->handle);
if( (c != '\n') && (c != EOF) )
ungetc(c, dfself->handle);
}
}
if(nread != n)
{
dfself->file.hasError = 1; /* shouldn't we put hasError to 0 all the time ? */
if(!dfself->file.isQuiet)
THError("read error: read %d blocks instead of %d", nread, n);
}
return nread;
}
static long THDiskFile_readString(THFile *self, const char *format, char **str_)
{
THDiskFile *dfself = (THDiskFile*)(self);
THArgCheck(dfself->handle != NULL, 1, "attempt to use a closed file");
THArgCheck(dfself->file.isReadable, 1, "attempt to read in a write-only file");
THArgCheck((strlen(format) >= 2 ? (format[0] == '*') && (format[1] == 'a' || format[1] == 'l') : 0), 2, "format must be '*a' or '*l'");
/* note: the string won't survive long, as it is copied into lua */
/* so 1024 is not that big... */
#define TBRS_BSZ 1024L
if(format[1] == 'a')
{
char *p = (char*)THAlloc(TBRS_BSZ);
long total = TBRS_BSZ;
long pos = 0L;
for (;;)
{
if(total-pos == 0) /* we need more space! */
{
total += TBRS_BSZ;
p = (char*)THRealloc(p, total);
}
if (p == NULL)
THError("read error: failed to allocate buffer");
pos += fread(p+pos, 1, total-pos, dfself->handle);
if (pos < total) /* eof? */
{
if(pos == 0L)
{
THFree(p);
dfself->file.hasError = 1;
if(!dfself->file.isQuiet)
THError("read error: read 0 blocks instead of 1");
*str_ = NULL;
return 0;
}
*str_ = p;
return pos;
}
}
}
else
{
char *p = (char*)THAlloc(TBRS_BSZ);
long total = TBRS_BSZ;
long pos = 0L;
long size;
for (;;)
{
if(total-pos <= 1) /* we can only write '\0' in there! */
{
total += TBRS_BSZ;
p = (char*)THRealloc(p, total);
}
if (p == NULL)
THError("read error: failed to allocate buffer");
if (fgets(p+pos, total-pos, dfself->handle) == NULL) /* eof? */
{
if(pos == 0L)
{
THFree(p);
dfself->file.hasError = 1;
if(!dfself->file.isQuiet)
THError("read error: read 0 blocks instead of 1");
*str_ = NULL;
return 0;
}
*str_ = p;
return pos;
}
size = strlen(p+pos);
if (size == 0L || (p+pos)[size-1] != '\n')
{
pos += size;
}
else
{
pos += size-1L; /* do not include `eol' */
*str_ = p;
return pos;
}
}
}
*str_ = NULL;
return 0;
}
THFile *THDiskFile_new(const char *name, const char *mode, int isQuiet)
{
static struct THFileVTable vtable = {
THDiskFile_isOpened,
THDiskFile_readByte,
THDiskFile_readChar,
THDiskFile_readShort,
THDiskFile_readInt,
THDiskFile_readLong,
THDiskFile_readFloat,
THDiskFile_readDouble,
THDiskFile_readString,
THDiskFile_seek,
THDiskFile_seekEnd,
THDiskFile_position,
THDiskFile_close,
THDiskFile_free
};
int isReadable;
int isWritable;
FILE *handle;
THDiskFile *self;
THArgCheck(THDiskFile_mode(mode, &isReadable, &isWritable), 2, "file mode should be 'r','w' or 'rw'");
CV_Assert(isReadable && !isWritable);
#ifdef _MSC_VER
if (fopen_s(&handle, name, "rb") != 0)
handle = NULL;
#else
handle = fopen(name,"rb");
#endif
if(!handle)
{
if(isQuiet)
return 0;
else
THError("cannot open <%s> in mode %c%c", name, (isReadable ? 'r' : ' '), (isWritable ? 'w' : ' '));
}
self = (THDiskFile*)THAlloc(sizeof(THDiskFile));
if (!self)
THError("cannot allocate memory for self");
self->handle = handle;
self->name = (char*)THAlloc(strlen(name)+1);
if (!self->name)
THError("cannot allocate memory for self->name");
strcpy(self->name, name);
self->isNativeEncoding = 1;
self->longSize = 0;
self->file.vtable = &vtable;
self->file.isQuiet = isQuiet;
self->file.isReadable = isReadable;
self->file.isWritable = isWritable;
self->file.isBinary = 0;
self->file.isAutoSpacing = 1;
self->file.hasError = 0;
return (THFile*)self;
}
}
#endif