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Top Forums Programming sizeof an array of structure without using 'sizeof' operator Post 302302213 by Corona688 on Monday 30th of March 2009 11:25:10 AM
Old 03-30-2009
Not aware of the size of the structure, as in, it contains elements that the compiler has not seen defined?

sizeof doesn't work on those because it really, genuinely doesn't know the size. You can't trick it into giving you information it does not possess; you can't make anything but pointers to those kind of types, and it certainly won't know the size of anything but the pointer.

Otherwise, why not use sizeof? That's what its there for.
 

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elf32_fsize(3ELF)					       ELF Library Functions						 elf32_fsize(3ELF)

NAME
elf32_fsize, elf64_fsize - return the size of an object file type SYNOPSIS
cc [ flag ... ] file ... -lelf [ library ... ] #include <libelf.h> size_t elf32_fsize(Elf_Type type, size_t count, unsigned ver); size_t elf64_fsize(Elf_Type type, size_t count, unsigned ver); DESCRIPTION
elf32_fsize() 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 calculate the size. See elf(3ELF) and elf_version(3ELF). 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) elf32_fsize() returns 0 if the value of type or ver is unknown. See elf32_xlatetof(3ELF) for a list of the type values. For the 64-bit class, replace 32 with 64 as appropriate. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
elf(3ELF), elf32_xlatetof(3ELF), elf_version(3ELF), libelf(3LIB), attributes(5) SunOS 5.11 11 Jul 2001 elf32_fsize(3ELF)
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