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/*************************************************************************
* unit: struct release 0.13 *
* struct.c - Provides some big and little endian abstraction functions,
* for manipulating with structures.
* Licency: GPL or LGPL *
* Copyright (C) 1999-2022 Jaroslav Fojtik
**************************************************************************/
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
#include "common.h"
#include "typedfs.h"
#include "struct.h"
#ifdef QWORD
#define QWORD_ QWORD
#else
#define QWORD_ double
#endif
#if __GNUC__>4 || (__GNUC__==4 && __GNUC_MINOR__>=3)
#define BYTESWAP_uint64(__pval) __pval=__builtin_bswap64(__pval)
#define BYTESWAP_uint32(__pval) __pval=__builtin_bswap32(__pval)
#else
#if _MSC_VER > 1200 /* Not present in MSVC6 or less. */
#include <stdlib.h>
#define BYTESWAP_uint64(__pval) __pval=_byteswap_uint64(__pval)
#define BYTESWAP_uint32(__pval) __pval=_byteswap_ulong(__pval)
#endif
#endif
#ifndef BYTESWAP_uint64
#define BYTESWAP_uint64(__pval) \
BYTE n; \
BYTE *x = (BYTE *)&__pval; \
n=x[0]; x[0]=x[7]; x[7]=n; \
n=x[1]; x[1]=x[6]; x[6]=n; \
n=x[2]; x[2]=x[5]; x[5]=n; \
n=x[3]; x[3]=x[4]; x[4]=n
#endif
#ifndef BYTESWAP_uint32
#define BYTESWAP_uint32(__pval) __pval = \
((__pval & 0xFF)<<24) | ((__pval & 0xFF00)<<8) | ((__pval & 0xFF0000)>>8) | ((__pval & 0xFF000000)>>24)
#endif
/* These procedures should be safe for all cases */
#ifndef RdWORD_LoEnd
/* Read a word from binary file in a LowEndian Format into a current endian.
* parameters: FILE *f : binary input file
* return: WORD *num : readed word */
int RdWORD_LoEnd(WORD *num, FILE *f)
{
#ifdef LO_ENDIAN
return(fread(num,1,2,f));
#endif
#ifdef HI_ENDIAN
int ret = fread(num,1,2,f);
*num = ((*num & 0xFF)<<8) | ((*num & 0xFF00)>>8);
return ret;
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
unsigned char b;
if(!fread( &b, 1,1,f)) return 0; *num=(WORD)b;
if(!fread( &b, 1,1,f)) return 1; *num+=(WORD)b * 256l;
return 2;
#endif
}
#endif
#ifndef RdDWORD_LoEnd
/* Read a double word from binary file in a LowEndian Format into a current endian.
* parameters: FILE *f : binary input file
* return: DWORD *num : readed double word */
int RdDWORD_LoEnd(DWORD *num, FILE *f)
{
#ifdef LO_ENDIAN
return(fread(num,1,4,f));
#endif
#ifdef HI_ENDIAN
const int i = fread(num,1,4,f);
BYTESWAP_uint32(*num);
return i;
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
unsigned char b;
if(!fread( &b, 1,1,f)) return 0; *num=(DWORD)b;
if(!fread( &b, 1,1,f)) return 1; *num+=(DWORD)b * 256l;
if(!fread( &b, 1,1,f)) return 2; *num+=(DWORD)b * 256l * 256l;
if(!fread( &b, 1,1,f)) return 3; *num+=(DWORD)b * 256l * 256l * 256l;
return 4;
#endif
}
#endif
#ifndef RdQWORD_LoEnd
/* Read a double word from binary file in a LowEndian Format into a current endian.
* parameters: FILE *f : binary input file
* return: QWORD *num : readed double word */
int RdQWORD_LoEnd(QWORD_ *num, FILE *f)
{
#ifdef LO_ENDIAN
return(fread(num,1,8,f));
#endif
#ifdef HI_ENDIAN
const int i = fread(num,1,8,f);
BYTESWAP_uint64(*num);
return i;
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
BYTE b;
if(!fread( &b, 1,1,f)) return 0; *num=(QWORD_)b;
if(!fread( &b, 1,1,f)) return 1; *num+=(QWORD_)b * 256l;
if(!fread( &b, 1,1,f)) return 2; *num+=(QWORD_)b * 256l * 256l;
if(!fread( &b, 1,1,f)) return 3; *num+=(QWORD_)b * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 4; *num+=(QWORD_)b * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 5; *num+=(QWORD_)b * 256l * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 6; *num+=(QWORD_)b * 256l * 256l * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 7; *num+=(QWORD_)b * 256l * 256l * 256l * 256l * 256l * 256l * 256l;
return 8;
#endif
}
#endif
#ifndef RdWORD_HiEnd
/* Read a word from binary file in a HiEndian Format
* parameters: FILE *f : binary input file
* return: WORD *num : readed word */
int RdWORD_HiEnd(WORD *num, FILE *f)
{
#ifdef LO_ENDIAN
int ret = fread(num,1,2,f);
*num = ((*num & 0xFF)<<8) | ((*num & 0xFF00)>>8);
return ret;
#endif
#ifdef HI_ENDIAN
return(fread(num,1,2,f));
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
//endian invariant
unsigned char b;
if(!fread(&b,1,1,f)) return 0; *num=(WORD)b * 256l;
if(!fread(&b,1,1,f)) return 1; *num+=(WORD)b;
return 2;
#endif
}
#endif
#ifndef RdDWORD_HiEnd
/* Read a double word from binary file in a HighEndian Format
* parameters: FILE *f : binary input file
* return: DWORD *num : readed double word */
int RdDWORD_HiEnd(DWORD *num, FILE *f)
{
#ifdef LO_ENDIAN
const int i = fread(num,1,4,f);
BYTESWAP_uint32(*num);
return i;
#endif
#ifdef HI_ENDIAN
return(fread(num,1,4,f));
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
//endian invariant
BYTE b;
if(!fread( &b, 1,1,f)) return 0; *num=(DWORD)b * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 1; *num+=(DWORD)b * 256l * 256l;
if(!fread( &b, 1,1,f)) return 2; *num+=(DWORD)b * 256l;
if(!fread( &b, 1,1,f)) return 3; *num+=(DWORD)b;
return 4;
#endif
}
#endif
#ifndef RdQWORD_HiEnd
/* Read a quad word from binary file in a HighEndian Format
* parameters: FILE *f : binary input file
* return: DWORD *num : readed double word */
int RdQWORD_HiEnd(QWORD_ *num, FILE *f)
{
#ifdef LO_ENDIAN
const int i = fread(num,1,8,f);
BYTESWAP_uint64(*num);
return i;
#endif
#ifdef HI_ENDIAN
return(fread(num,1,8,f));
#endif
#if !defined(LO_ENDIAN) && !defined(HI_ENDIAN)
//endian invariant
BYTE b;
if(!fread( &b, 1,1,f)) return 0; *num=(DWORD)b * 256l * 256l * 256l * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 1; *num+=(DWORD)b * 256l * 256l * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 2; *num+=(DWORD)b * 256l * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 3; *num+=(DWORD)b * 256l * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 4; *num+=(DWORD)b * 256l * 256l * 256l;
if(!fread( &b, 1,1,f)) return 5; *num+=(DWORD)b * 256l * 256l;
if(!fread( &b, 1,1,f)) return 6; *num+=(DWORD)b * 256l;
if(!fread( &b, 1,1,f)) return 7; *num+=(DWORD)b;
return 8;
#endif
}
#endif
#ifndef WrWORD_LoEnd
/* Write a word to the binary file in a LowEndian Format
* parameters: FILE *f : binary input file
* WORD num : word to be written */
int WrWORD_LoEnd(WORD num, FILE *f)
{
#ifdef LO_ENDIAN
return(fwrite(&num,1,2,f));
#else
BYTE b;
b = (BYTE)((num >> 8*0) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*1) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 1;
return 2;
#endif
}
#endif
#ifndef WrDWORD_LoEnd
/* Write a double word to the binary file in a LowEndian Format
* parameters: FILE *f : binary input file
* DWORD num : double word to be written */
int WrDWORD_LoEnd(DWORD num, FILE *f)
{
#ifdef LO_ENDIAN
return(fwrite(&num,1,4,f));
#else
#ifdef HI_ENDIAN
BYTESWAP_uint32(num);
return(fwrite(&num,1,4,f));
#else
BYTE b;
b = (BYTE)((num >> 8*0) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*1) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 1;
b = (BYTE)((num >> 8*2) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 2;
b = (BYTE)((num >> 8*3) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 3;
return 4;
#endif
#endif
}
#endif
#ifndef WrWORD_HiEnd
/* Write a word to the binary file in a HighEndian Format
* parameters: FILE *f : binary input file
* WORD num : word to be written */
int WrWORD_HiEnd(WORD num, FILE *f)
{
#ifdef HI_ENDIAN
return(fwrite(&num,1,2,f));
#else
BYTE b;
b = (BYTE)((num >> 8*1) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*0) & 0x00ffl); if(!fwrite( &b, 1,1,f)) return 1;
return 2;
#endif
}
#endif
#ifndef WrDWORD_HiEnd
/* Write a double word to the binary file in a HiEndian Format
* parameters: FILE *f : binary input file
* DWORD num : double word to be written */
int WrDWORD_HiEnd(DWORD num, FILE *f)
{
#ifdef HI_ENDIAN
return(fwrite(&num,1,4,f));
#else
#ifdef LO_ENDIAN
BYTESWAP_uint32(num);
return(fwrite(&num,1,4,f));
#else
BYTE b;
b = (BYTE)((num >> 8*3) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*2) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 1;
b = (BYTE)((num >> 8*1) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 2;
b = (BYTE)((num >> 8*0) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 3;
return 4;
#endif
#endif
}
#endif
#ifndef WrQWORD_HiEnd
/* Write a quad word to the binary file in a HiEndian Format
* parameters: FILE *f : binary input file
* DWORD num : double word to be written */
int WrQWORD_HiEnd(QWORD_ num, FILE *f)
{
#ifdef HI_ENDIAN
return(fwrite(&num,1,8,f));
#else
#ifdef LO_ENDIAN
BYTESWAP_uint64(num);
return(fwrite(&num,1,8,f));
#else
BYTE b;
b = (BYTE)((num >> 8*7) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*6) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 1;
b = (BYTE)((num >> 8*5) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 2;
b = (BYTE)((num >> 8*4) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 3;
b = (BYTE)((num >> 8*3) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 4;
b = (BYTE)((num >> 8*2) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 5;
b = (BYTE)((num >> 8*1) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 6;
b = (BYTE)((num >> 8*0) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 7;
return 8;
#endif
#endif
}
#endif
#ifndef WrQWORD_LoEnd
/* Write a quad word to the binary file in a LowEndian Format
* parameters: FILE *f : binary input file
* DWORD num : double word to be written */
int WrQWORD_LoEnd(QWORD_ num, FILE *f)
{
#ifdef LO_ENDIAN
return(fwrite(&num,1,8,f));
#else
#ifdef HI_ENDIAN
BYTESWAP_uint64(num);
return(fwrite(&num,1,8,f));
#else
BYTE b;
b = (BYTE)((num >> 8*0) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 0;
b = (BYTE)((num >> 8*1) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 1;
b = (BYTE)((num >> 8*2) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 2;
b = (BYTE)((num >> 8*3) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 3;
b = (BYTE)((num >> 8*4) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 4;
b = (BYTE)((num >> 8*5) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 5;
b = (BYTE)((num >> 8*6) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 6;
b = (BYTE)((num >> 8*7) & 0x00FFl); if(!fwrite(&b, 1,1,f)) return 7;
return 8;
#endif
#endif
}
#endif
/** Read a WORD from byte stream. */
WORD fil_sreadU16(const BYTE *in)
{
#ifdef LO_ENDIAN
return *(WORD *)in;
#else
return (WORD)in[0] +
((WORD)in[1] << 8);
#endif
}
/** Read a DWORD from byte stream. */
DWORD fil_sreadU32(const BYTE *in)
{
#ifdef LO_ENDIAN
return *(DWORD *)in;
#else
return (DWORD)in[0] +
((DWORD)in[1] << 8) +
((DWORD)in[2] << 8*2) +
((DWORD)in[3] << 8*3);
#endif
}
int loadstruct(FILE *F,const char *description, ...)
{
va_list ap;
int loaded=0;
int ArraySize;
va_start(ap, description);
while(*description!=0)
{
switch(*description)
{
case 'b':
case 'B':loaded+=fread(va_arg(ap,char *),1,1,F);
break;
case 'w':loaded+=RdWORD_LoEnd(va_arg(ap,WORD *),F);
break;
case 'W':loaded+=RdWORD_HiEnd(va_arg(ap,WORD *),F);
break;
case 'd':loaded+=RdDWORD_LoEnd(va_arg(ap,DWORD *),F);
break;
case 'D':loaded+=RdDWORD_HiEnd(va_arg(ap,DWORD *),F);
break;
case 'q':loaded+=RdQWORD_LoEnd(va_arg(ap,QWORD_ *),F);
break;
case 'Q':loaded+=RdQWORD_HiEnd(va_arg(ap,QWORD_ *),F);
break;
case 'a':
case 'A':ArraySize=0;
while (isdigit(*(++description)))
{
ArraySize = 10*ArraySize + (int)(*description-'0');
}
description--;
loaded+=fread(va_arg(ap,char *),1,ArraySize,F);
break;
default:printf("Error: Unknown character '%c'!", *description);
}
description++;
}
va_end(ap);
return(loaded);
}
int savestruct(FILE *F, const char *description, ...)
{
va_list ap;
int writed=0;
int ArraySize;
va_start(ap, description);
while(*description!=0)
{
//printf("%c",*description);fflush(stdout);
switch(*description)
{
#ifndef __Ellipsis_Expand_Short
case 'b':
case 'B':{const char c = va_arg(ap,char);
writed+=fwrite(&c,1,1,F);}
break;
case 'w':writed += WrWORD_LoEnd(va_arg(ap,WORD),F);
break;
case 'W':writed+=WrWORD_HiEnd(va_arg(ap,WORD),F);
break;
#else //all shorts are internally converted to int
case 'b':
case 'B':{char c=va_arg(ap,int);
writed+=fwrite(&c,1,1,F);
break;}
case 'w':writed += WrWORD_LoEnd(va_arg(ap,int),F);
break;
case 'W':writed += WrWORD_HiEnd(va_arg(ap,int),F);
break;
#endif
case 'd':writed += WrDWORD_LoEnd(va_arg(ap,DWORD),F);
break;
case 'D':writed += WrDWORD_HiEnd( va_arg(ap,DWORD),F);
break;
case 'a':
case 'A':ArraySize=0;
while (isdigit(*(++description)))
{
ArraySize=10*ArraySize + (int)(*description-'0');
}
description--;
writed += fwrite(va_arg(ap,const char *), 1, ArraySize,F);
break;
case 'q':writed+=WrQWORD_LoEnd(va_arg(ap,QWORD_),F);
break;
case 'Q':writed+=WrQWORD_HiEnd(va_arg(ap,QWORD_),F);
break;
case 'e':{const double e = va_arg(ap,double);
writed+=WrQWORD_LoEnd(*(const QWORD_*)&e,F);}
break;
case 'E':{const double e = va_arg(ap,double);
writed+=WrQWORD_HiEnd(*(const QWORD_*)&e,F);}
break;
default:printf("Error: Unknown character %c !", *description);
}
description++;
}
va_end(ap);
return(writed);
}
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