This commit refactors the project using a single, consistent coding
style, derived from the Linux Kernel Coding Style, available here:
https://www.kernel.org/doc/Documentation/CodingStyle
This includes, but is not limited to:
* Removal of typedefs, especially for structs
* Limiting lines to a reasonable length, 80 characters, mostly
* K&R style braces
* Removal of CamelCase
The htab_structure has been modified in two ways, which should not break
compatability with any of its uses.
It includes a void pointer, which is in this commit used to point to a
string for defines, and will in the future be used to point to the address
space for words, bytes, and double words.
It now includes a function htab_add_str specifically for storing strings.
It calls htab_add so as not to be redundant, but makes the node's value
their index for the lexer to fetch using htab_find, and assigns their
void pointer.
The lexer will now use htab_find on all tokens to see if they are a define
string, and if so, substitute them with the appropriate token.
The defines htab is destroyed after lexing, because that memory is done.
Before allocating space for a token, the lexer will first check to see
if that token is a defined name. If it is, it will allocate space for
the defined string instead.
A test file is included in programs/tinyvm/preprocessor to demonstrate
the behavior. When functioning, the program will print the fibonacci
sequence.
