Application in Low and High Level Languages
Self-modification can be accomplished in a variety of ways depending upon the programming language and its support for pointers and/or access to dynamic compiler or interpreter 'engines':-
- overlay of existing instructions (or parts of instructions such as opcode, register, flags or address) or
- direct creation of whole instructions or sequences of instructions in memory
- creating or modification of source code statements followed by a 'mini compile' or a dynamic interpretation (see eval statement)
- creating an entire program dynamically and then executing it
Read more about this topic: Self-modifying Code
Famous quotes containing the words application, high, level and/or languages:
“Great abilites are not requisite for an Historian; for in historical composition, all the greatest powers of the human mind are quiescent. He has facts ready to his hand; so there is no exercise of invention. Imagination is not required in any degree; only about as much as is used in the lowest kinds of poetry. Some penetration, accuracy, and colouring, will fit a man for the task, if he can give the application which is necessary.”
—Samuel Johnson (1709–1784)
“The best conversation is rare. Society seems to have agreed to treat fictions as realities, and realities as fictions; and the simple lover of truth, especially if on very high grounds, as a religious or intellectual seeker, finds himself a stranger and alien.”
—Ralph Waldo Emerson (1803–1882)
“The low level which commercial morality has reached in America is deplorable. We have humble God fearing Christian men among us who will stoop to do things for a million dollars that they ought not to be willing to do for less than 2 millions.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“No doubt, to a man of sense, travel offers advantages. As many languages as he has, as many friends, as many arts and trades, so many times is he a man. A foreign country is a point of comparison, wherefrom to judge his own.”
—Ralph Waldo Emerson (1803–1882)