thodg/libgit2/src/patch.c

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• Hash : 0c7f49dd
  Author :
  Date : 2017-06-30T13:39:01
  

  Make sure to always include "common.h" first Next to including several files, our "common.h" header also declares various macros which are then used throughout the project. As such, we have to make sure to always include this file first in all implementation files. Otherwise, we might encounter problems or even silent behavioural differences due to macros or defines not being defined as they should be. So in fact, our header and implementation files should make sure to always include "common.h" first. This commit does so by establishing a common include pattern. Header files inside of "src" will now always include "common.h" as its first other file, separated by a newline from all the other includes to make it stand out as special. There are two cases for the implementation files. If they do have a matching header file, they will always include this one first, leading to "common.h" being transitively included as first file. If they do not have a matching header file, they instead include "common.h" as first file themselves. This fixes the outlined problems and will become our standard practice for header and source files inside of the "src/" from now on.

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• src/patch.c

• /*
  * Copyright (C) the libgit2 contributors. All rights reserved.
  *
  * This file is part of libgit2, distributed under the GNU GPL v2 with
  * a Linking Exception. For full terms see the included COPYING file.
  */
  
  #include "patch.h"
  
  #include "git2/patch.h"
  #include "diff.h"
  
  int git_patch__invoke_callbacks(
  	git_patch *patch,
  	git_diff_file_cb file_cb,
  	git_diff_binary_cb binary_cb,
  	git_diff_hunk_cb hunk_cb,
  	git_diff_line_cb line_cb,
  	void *payload)
  {
  	int error = 0;
  	uint32_t i, j;
  
  	if (file_cb)
  		error = file_cb(patch->delta, 0, payload);
  
  	if (error)
  		return error;
  
  	if ((patch->delta->flags & GIT_DIFF_FLAG_BINARY) != 0) {
  		if (binary_cb)
  			error = binary_cb(patch->delta, &patch->binary, payload);
  
  		return error;
  	}
  
  	if (!hunk_cb && !line_cb)
  		return error;
  
  	for (i = 0; !error && i < git_array_size(patch->hunks); ++i) {
  		git_patch_hunk *h = git_array_get(patch->hunks, i);
  
  		if (hunk_cb)
  			error = hunk_cb(patch->delta, &h->hunk, payload);
  
  		if (!line_cb)
  			continue;
  
  		for (j = 0; !error && j < h->line_count; ++j) {
  			git_diff_line *l =
  				git_array_get(patch->lines, h->line_start + j);
  
  			error = line_cb(patch->delta, &h->hunk, l, payload);
  		}
  	}
  
  	return error;
  }
  
  size_t git_patch_size(
  	git_patch *patch,
  	int include_context,
  	int include_hunk_headers,
  	int include_file_headers)
  {
  	size_t out;
  
  	assert(patch);
  
  	out = patch->content_size;
  
  	if (!include_context)
  		out -= patch->context_size;
  
  	if (include_hunk_headers)
  		out += patch->header_size;
  
  	if (include_file_headers) {
  		git_buf file_header = GIT_BUF_INIT;
  
  		if (git_diff_delta__format_file_header(
  			&file_header, patch->delta, NULL, NULL, 0) < 0)
  			giterr_clear();
  		else
  			out += git_buf_len(&file_header);
  
  		git_buf_free(&file_header);
  	}
  
  	return out;
  }
  
  int git_patch_line_stats(
  	size_t *total_ctxt,
  	size_t *total_adds,
  	size_t *total_dels,
  	const git_patch *patch)
  {
  	size_t totals[3], idx;
  
  	memset(totals, 0, sizeof(totals));
  
  	for (idx = 0; idx < git_array_size(patch->lines); ++idx) {
  		git_diff_line *line = git_array_get(patch->lines, idx);
  		if (!line)
  			continue;
  
  		switch (line->origin) {
  		case GIT_DIFF_LINE_CONTEXT:  totals[0]++; break;
  		case GIT_DIFF_LINE_ADDITION: totals[1]++; break;
  		case GIT_DIFF_LINE_DELETION: totals[2]++; break;
  		default:
  			/* diff --stat and --numstat don't count EOFNL marks because
  			* they will always be paired with a ADDITION or DELETION line.
  			*/
  			break;
  		}
  	}
  
  	if (total_ctxt)
  		*total_ctxt = totals[0];
  	if (total_adds)
  		*total_adds = totals[1];
  	if (total_dels)
  		*total_dels = totals[2];
  
  	return 0;
  }
  
  const git_diff_delta *git_patch_get_delta(const git_patch *patch)
  {
  	assert(patch);
  	return patch->delta;
  }
  
  size_t git_patch_num_hunks(const git_patch *patch)
  {
  	assert(patch);
  	return git_array_size(patch->hunks);
  }
  
  static int patch_error_outofrange(const char *thing)
  {
  	giterr_set(GITERR_INVALID, "patch %s index out of range", thing);
  	return GIT_ENOTFOUND;
  }
  
  int git_patch_get_hunk(
  	const git_diff_hunk **out,
  	size_t *lines_in_hunk,
  	git_patch *patch,
  	size_t hunk_idx)
  {
  	git_patch_hunk *hunk;
  	assert(patch);
  
  	hunk = git_array_get(patch->hunks, hunk_idx);
  
  	if (!hunk) {
  		if (out) *out = NULL;
  		if (lines_in_hunk) *lines_in_hunk = 0;
  		return patch_error_outofrange("hunk");
  	}
  
  	if (out) *out = &hunk->hunk;
  	if (lines_in_hunk) *lines_in_hunk = hunk->line_count;
  	return 0;
  }
  
  int git_patch_num_lines_in_hunk(const git_patch *patch, size_t hunk_idx)
  {
  	git_patch_hunk *hunk;
  	assert(patch);
  
  	if (!(hunk = git_array_get(patch->hunks, hunk_idx)))
  		return patch_error_outofrange("hunk");
  	return (int)hunk->line_count;
  }
  
  int git_patch_get_line_in_hunk(
  	const git_diff_line **out,
  	git_patch *patch,
  	size_t hunk_idx,
  	size_t line_of_hunk)
  {
  	git_patch_hunk *hunk;
  	git_diff_line *line;
  
  	assert(patch);
  
  	if (!(hunk = git_array_get(patch->hunks, hunk_idx))) {
  		if (out) *out = NULL;
  		return patch_error_outofrange("hunk");
  	}
  
  	if (line_of_hunk >= hunk->line_count ||
  		!(line = git_array_get(
  			patch->lines, hunk->line_start + line_of_hunk))) {
  		if (out) *out = NULL;
  		return patch_error_outofrange("line");
  	}
  
  	if (out) *out = line;
  	return 0;
  }
  
  int git_patch_from_diff(git_patch **out, git_diff *diff, size_t idx)
  {
  	assert(out && diff && diff->patch_fn);
  	return diff->patch_fn(out, diff, idx);
  }
  
  static void git_patch__free(git_patch *patch)
  {
  	if (patch->free_fn)
  		patch->free_fn(patch);
  }
  
  void git_patch_free(git_patch *patch)
  {
  	if (patch)
  		GIT_REFCOUNT_DEC(patch, git_patch__free);
  }
  

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