obfuscate.c File Reference

#include <string.h>
#include <stdio.h>
#include "defines.h"
#include "obfuscate.h"
#include "util.h"
#include "tree.h"

Functions
void	obfuscate_set_mode (bool value)
char *	obfuscate_name (const char *real_name, char prefix)
	Gets an obfuscated name for the given actual name.
void	obfuscate_dealloc ()
Variables
static tnode *	obf_tree = NULL
static int	obf_curr_id = 1000
bool	obf_mode

---

Detailed Description

Author:

Trevor Williams (phase1geo@gmail.com)

Date:

9/16/2006

---

Function Documentation

void obfuscate_dealloc

(

)

Deallocates all memory associated with obfuscation.

References PROFILE, PROFILE_END, and tree_dealloc().

Referenced by main().

                         { PROFILE(OBFUSCATE_DEALLOC);

  tree_dealloc( obf_tree );

  PROFILE_END;

}

char* obfuscate_name	(	const char *	real_name,
		char	prefix
	)

Gets an obfuscated name for the given actual name.

Returns:

Returns the obfuscated name for this object.

Looks up the given real name in the obfuscation tree. If it exists, simply return the given name; otherwise, create a new element in the tree to represent this new name.

Parameters:

	real_name	Name of actual object in design
	prefix	Character representing the prefix of the obfuscated name

References FALSE, free_safe, malloc_safe, obf_curr_id, PROFILE, PROFILE_END, tree_add(), tree_find(), and tnode_s::value.

  { PROFILE(OBFUSCATE_NAME);

  tnode*       obfnode;    /* Pointer to obfuscated tree node */
  char*        key;        /* Temporary name used for searching */
  char         tname[30];  /* Temporary name used for sizing obfuscation ID */
  unsigned int rv;         /* Return value from snprintf calls */
  unsigned int slen;       /* String length */

  /* Create temporary name */
  slen = strlen( real_name ) + 3;
  key = (char*)malloc_safe( slen );
  rv = snprintf( key, slen, "%s-%c", real_name, prefix );
  assert( rv < slen );

  /* If the name was not previously obfuscated, create a new obfuscated entry in the tree and return the new name */
  if( (obfnode = tree_find( key, obf_tree )) == NULL ) {

    /* Create obfuscated name */
    rv = snprintf( tname, 30, "%c%04d", prefix, obf_curr_id );
    assert( rv < 30 );
    obf_curr_id++;

    /* Add the obfuscated name to the tree and get the pointer to the new node */
    obfnode = tree_add( key, tname, FALSE, &obf_tree );

  }

  /* Deallocate key string */
  free_safe( key, (strlen( key ) + 1) );

  PROFILE_END;

  return( obfnode->value );

}

void obfuscate_set_mode

(

bool

value

)

Sets the global 'obf_mode' variable to the specified value.

Parameters:

value

Boolean value to set obfuscation mode to

References obf_mode, PROFILE, and PROFILE_END.

Referenced by main().

  { PROFILE(OBFUSCATE_SET_MODE);

  obf_mode = value;

  PROFILE_END;

}

---

Variable Documentation

int obf_curr_id = 1000 [static]

Current obfuscation identifier. Incremented by one each time that a new obfuscation occurs.

Referenced by obfuscate_name().

bool obf_mode

Specifies obfuscation mode.

Referenced by obfuscate_set_mode().

tnode* obf_tree = NULL [static]

Pointer to the root of the obfuscation tree containing real to obfuscated name pairings.