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From: gt7010a AT prism DOT gatech DOT edu (Ojas Parekh)
Newsgroups: comp.os.msdos.djgpp
Subject: Determining proper sizeof a struct
Date: Mon, 30 Oct 1995 19:24:02 GMT
Organization: Future Services, Inc.
Lines: 43
Nntp-Posting-Host: lpm2-12.atlcom.net
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

#include <stdio.h>

typedef unsigned short word;
typedef unsigned char  byte;
typedef unsigned char  bit;

typedef struct {
  bit   notval           :1; 
  bit   isrequest       :1; 
  bit   resumelater   :1; 
  bit   hatched        :1; 
} filstat;

typedef struct {                 
  char  filename[13];          
  char  description[61];      
  short credits;                   
  word  downloaded;         
  byte  sizemod;                 
  word  blocks;                 
  word  owner;                  
  char  stowner[37];          
  char  date[9];                
  word  daten;      
  long  vpointer;   
  filstat filestat;     
  byte  res[10];
} ulfrec;

main() {
  printf("sizeof(ulfrec) = %li\n", sizeof(ulfrec));
}


This program prints a value of 148 for sizeof(ulfrec) under both
DJGPPV2 and DJGPP 1.12m4, but the value should be 146.
Compiled under BC 3.1, this same program reports 146 for
sizeof(ulfrec) as it should.  Is there something about gcc/DJGPP
data types that I am not aware of?  Thanks.

Ojas