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Top Forums Programming sizeof an array of structure without using 'sizeof' operator Post 302302225 by pshaikh on Monday 30th of March 2009 11:47:14 AM
Old 03-30-2009
Quote:
Originally Posted by rvan
Hi All,

is it possible to find out the size of an array of structures ( without using 'sizeof' operator). The condition is we have the array of structure instant but we are not aware of the elements inside the structure.

Can someone help me out?


Thanks in advance.
Try this -

Code:
int main()
{
     struct whatever w;
     char s;

      if( (char*)&w > & z)
        printf("Size of whatever %d\n",(char*)&w-&z)
      else
        printf("Size of whatever %d\n",(char*)&w-&z)
}

 

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elf_fsize(3E)															     elf_fsize(3E)

NAME
elf32_fsize, elf64_fsize - return the size of an object file type for elf32 files, return the size of an object file type for elf64 files, respectively. SYNOPSIS
[flag... ] file... [library] ... DESCRIPTION
gives the size in bytes of the 32-bit file representation of count data objects with the given type. The library uses version ver to cal- culate the size (see elf(3E) and elf_version(3E)). Constant values are available for the sizes of fundamental types. Elf_Type File Size Memory Size ------------------------------------------------------ ELF_T_ADDR ELF32_FSZ_ADDR sizeof(Elf32_Addr) ELF_T_BYTE 1 sizeof(unsigned char) ELF_T_HALF ELF32_FSZ_HALF sizeof(Elf32_Half) ELT_T_OFF ELF32_FSZ_OFF sizeof(Elf32_Off) ELF_T_SWORD ELF32_FSZ_SWORD sizeof(Elf32_Sword) ELF_T_WORD ELF32_FSZ_WORD sizeof(Elf32_Word) returns zero if the value of type or ver is unknown. See elf_xlate(3E) for a list of the type values. gives the size in bytes of the 64-bit file representation of count data objects with the given type. The library uses version ver to cal- culate the size (see elf(3E) and elf_version(3E)). Constant values are available for the sizes of fundamental types. Elf_Type File Size Memory Size ------------------------------------------------------ ELF_T_ADDR ELF64_FSZ_ADDR sizeof(Elf64_Addr) ELF_T_BYTE 1 sizeof(unsigned char) ELF_T_HALF ELF64_FSZ_HALF sizeof(Elf64_Half) ELT_T_OFF ELF64_FSZ_OFF sizeof(Elf64_Off) ELF_T_SWORD ELF64_FSZ_SWORD sizeof(Elf64_Sword) ELF_T_WORD ELF64_FSZ_WORD sizeof(Elf64_Word) returns zero if the value of type or ver is unknown. See elf_xlate(3E) for a list of the type values. SEE ALSO
elf(3E), elf_version(3E), elf_xlate(3E). elf_fsize(3E)
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