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Top Forums Programming how to check whether given numbe ris hex or not Post 302243749 by shamrock on Monday 6th of October 2008 01:22:02 PM
Old 10-06-2008
Certain conventions are used when dealing with numbers in different bases. Hex digits are prefixed with 0x or 0X; octals have a leading zero; and decimals are written as is...
Code:
int dec, oct, hx;
oct = 056; /* octal 56 */ 
hx = 0x56; /* hex 56 */
dec = 56; /* decimal 56 */

Is that it or are you looking to parse a string of characters into hex / decimal digits? The requirements are not clear from your post.
 

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RAX2(1) 						    BSD General Commands Manual 						   RAX2(1)

NAME
rax2 -- radare base converter SYNOPSIS
rax2 [-ebsSvxkh] [[value] ...] DESCRIPTION
This command is part of the radare project. This command allows you to convert values between positive and negative integer, float octal, binary and hexadecimal values. OPTIONS
-e Swap endian. -b Convert from binary string to caracter (rax2 -b 01000101) -s Convert from hex string to caracter (rax2 -s 43 4a 50) -S Convert from hex string to caracter (rax2 -S C J P) -v Show program version -x Convert a string into a hash -k Keep de same base as the input data -h Show usage help message USAGE
Available variable types are: int -> hex rax2 10 hex -> int rax2 0xa -int -> hex rax2 -77 -hex -> int rax2 0xffffffb3 int -> bin rax2 b30 bin -> int rax2 1010d float -> hex rax2 3.33f hex -> float rax2 Fx40551ed8 oct -> hex rax2 35o hex -> oct rax2 Ox12 (O is a letter) bin -> hex rax2 1100011b hex -> bin rax2 Bx63 With no arguments, rax2 reads values from stdin. You can pass one or more values as arguments. $ rax2 33 0x41 0101b 0x21 65 0x5 You can do 'unpack' hexpair encoded strings easily. $ rax2 -s 41 42 43 ABC And it supports some math operations. $ rax2 0x5*101b+5 30 It is very useful tool for scripting, so you can read floating point values, or get the integer offset of a jump or a stack delta when ana- lyzing programs. SEE ALSO
radare2(1), rahash2(1), rafind2(1), rabin2(1), ranal2(1), radiff2(1), ragg2(1), rarun2(1), rasm2(1), AUTHORS
pancake <pancake@nopcode.org>, nibble <nibble@develsec.org> BSD
Mar 12, 2010 BSD
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