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Full Discussion: strlen for UTF-8
Top Forums Programming strlen for UTF-8 Post 302413945 by pludi on Sunday 18th of April 2010 02:01:37 PM
Old 04-18-2010
Quote:
Originally Posted by cyler
One of the things I wanted to point out: if 'a' is 4 bytes, isn't it overflowing char which is 1 byte ?
No. Because the type char is defined as being 1 byte. However, if the compiler thinks a character might be a multi-byte symbol, it might silently convert it to an character array, or a matching multi-byte type. If it's converted to an character array, sizeof will probably return the size of the pointer to it (int == 4 bytes), or the size of the internal type (Unicode = 32bit == 4 bytes). Which case matches I cannot tell, as I'm only doing educated guesses here.
 

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LEARN ABOUT DEBIAN

hardened-cc

HARDENED-CC(1)							 Debian GNU/Linux						    HARDENED-CC(1)

NAME

       hardened-cc - gcc wrapper to enforce hardening toolchain improvements

SYNOPSIS

       export DEB_BUILD_HARDENING=1

       gcc ...

DESCRIPTION

       The  hardened-cc  wrapper  is  normally	used by calling gcc as usual when DEB_BUILD_HARDENING is set to 1. It will configure the necessary
       toolchain hardening features. By default, all features are enabled. If a given feature does not work correctly and needs  to  be  disabled,
       the corresponding environment variables mentioned below can be set to 0.

ENVIRONMENT

       DEB_BUILD_HARDENING=1
	      Enable hardening features.

       DEB_BUILD_HARDENING_DEBUG=1
	      Print the full resulting gcc command line to STDERR before calling gcc.

       DEB_BUILD_HARDENING_STACKPROTECTOR=0
	      Disable stack overflow protection. See README.Debian for details.

       DEB_BUILD_HARDENING_RELRO=0
	      Disable read-only linker sections. See README.Debian for details.

       DEB_BUILD_HARDENING_FORTIFY=0
	      Don't fortify several standard functions. See README.Debian for details.

       DEB_BUILD_HARDENING_PIE=0
	      Don't build position independent executables. See README.Debian for details.

       DEB_BUILD_HARDENING_FORMAT=0
	      Disable unsafe format string usage errors. See README.Debian for details.

NOTES

       System-wide settings can be added to /etc/hardening-wrapper.conf, one per line.

       The  real gcc symlinks are renamed gcc.real, and a diversion is registered with dpkg-divert(1).	Thus hardened-cc's idea of the default gcc
       is dictated by whatever package installed /usr/bin/gcc.

SEE ALSO

       hardened-ld(1) gcc(1)

Debian Project							    2008-01-08							    HARDENED-CC(1)
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