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* Update diff to use iteratorsRussell Belfer2012-03-021-22/+24
| | | | | | | | | | | | | This is a major reorganization of the diff code. This changes the diff functions to use the iterators for traversing the content. This allowed a lot of code to be simplified. Also, this moved the functions relating to outputting a diff into a new file (diff_output.c). This includes a number of other changes - adding utility functions, extending iterators, etc. plus more tests for the diff code. This also takes the example diff.c program much further in terms of emulating git-diff command line options.
* Add tests and fix bugs for diff whitespace optionsRussell Belfer2012-03-021-0/+87
| | | | | | Once I added tests for the whitespace handling options of diff, I realized that there were some bugs. This fixes those and adds the new tests into the test suite.
* Continue implementation of git-diffRussell Belfer2012-03-021-24/+5
| | | | | | | | * Implemented git_diff_index_to_tree * Reworked git_diff_options structure to handle more options * Made most of the options in git_diff_options actually work * Reorganized code a bit to remove some redundancy * Added option parsing to examples/diff.c to test most options
* Clean up diff implementation for reviewRussell Belfer2012-03-021-0/+105
This fixes several bugs, updates tests and docs, eliminates the FILE* assumption in favor of printing callbacks for the diff patch formatter helpers, and adds a "diff" example function that can perform a diff from the command line.