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/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_filter_h__
#define INCLUDE_filter_h__
#include "common.h"
#include "buffer.h"
#include "git2/odb.h"
#include "git2/repository.h"
typedef struct git_filter {
int (*apply)(struct git_filter *self, git_buf *dest, const git_buf *source);
void (*do_free)(struct git_filter *self);
} git_filter;
typedef enum {
GIT_FILTER_TO_WORKTREE,
GIT_FILTER_TO_ODB
} git_filter_mode;
typedef enum {
GIT_CRLF_GUESS = -1,
GIT_CRLF_BINARY = 0,
GIT_CRLF_TEXT,
GIT_CRLF_INPUT,
GIT_CRLF_CRLF,
GIT_CRLF_AUTO,
} git_crlf_t;
typedef struct {
/* NUL, CR, LF and CRLF counts */
unsigned int nul, cr, lf, crlf;
/* These are just approximations! */
unsigned int printable, nonprintable;
} git_text_stats;
/*
* FILTER API
*/
/*
* For any given path in the working directory, fill the `filters`
* array with the relevant filters that need to be applied.
*
* Mode is either `GIT_FILTER_TO_WORKTREE` if you need to load the
* filters that will be used when checking out a file to the working
* directory, or `GIT_FILTER_TO_ODB` for the filters used when writing
* a file to the ODB.
*
* @param filters Vector where to store all the loaded filters
* @param repo Repository object that contains `path`
* @param path Relative path of the file to be filtered
* @param mode Filtering direction (WT->ODB or ODB->WT)
* @return the number of filters loaded for the file (0 if the file
* doesn't need filtering), or a negative error code
*/
extern int git_filters_load(git_vector *filters, git_repository *repo, const char *path, int mode);
/*
* Apply one or more filters to a file.
*
* The file must have been loaded as a `git_buf` object. Both the `source`
* and `dest` buffers are owned by the caller and must be freed once
* they are no longer needed.
*
* NOTE: Because of the double-buffering schema, the `source` buffer that contains
* the original file may be tampered once the filtering is complete. Regardless,
* the `dest` buffer will always contain the final result of the filtering
*
* @param dest Buffer to store the result of the filtering
* @param source Buffer containing the document to filter
* @param filters A non-empty vector of filters as supplied by `git_filters_load`
* @return GIT_SUCCESS on success, an error code otherwise
*/
extern int git_filters_apply(git_buf *dest, git_buf *source, git_vector *filters);
/*
* Free the `filters` array generated by `git_filters_load`.
*
* Note that this frees both the array and its contents. The array will
* be clean/reusable after this call.
*
* @param filters A filters array as supplied by `git_filters_load`
*/
extern void git_filters_free(git_vector *filters);
/*
* Available filters
*/
/* Strip CRLF, from Worktree to ODB */
extern int git_filter_add__crlf_to_odb(git_vector *filters, git_repository *repo, const char *path);
/*
* PLAINTEXT API
*/
/*
* Gather stats for a piece of text
*
* Fill the `stats` structure with information on the number of
* unreadable characters, carriage returns, etc, so it can be
* used in heuristics.
*/
extern void git_text_gather_stats(git_text_stats *stats, const git_buf *text);
/*
* Process `git_text_stats` data generated by `git_text_stat` to see
* if it qualifies as a binary file
*/
extern int git_text_is_binary(git_text_stats *stats);
#endif
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