rename diff_atom->d to diff_atom->root, because it always is The idea was that for each diff box within the files, the atoms would have a backpointer to the current layer of diff_data (indicating the current section), but it is not actually needed to update the backpointer in each atom to the current diff_data. That is why the current code always points atom->d to the root diff_data for the entire file. Clarify by proper name. Constructs like atom->d->root->foo are redundant, just use atom->root->foo.

add missing curly braces (clang reported misleading indentation)

move headers from include/diff/ to include/; makes things easier for consumers

check results of ARRAYLIST_ADD

check return value of diff_output_lines

optionally provide information about the generated diff to the API user

add APIs to write out the left and right versions of diff chunks

move some definitions from the public diff_main.h to an internal header file

convert abort() in diff_output_lines() to error return

use buffered stdio if falling back on file i/o; this is much faster

avoid include statements in header files; make each .c pull in what's needed

fall back on file i/o in case an input file cannot be memory-mapped

KNF: use max 80 columns

KNF: function declaration return types on separate line

Only print (unified) header in unified format.

Remove unused `arbitrary_info'.

dont escape tabs in text output

initial commit