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942 lines (749 loc) · 22.2 KB
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/*
* 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 "common.h"
#include "diff.h"
#include "diff_file.h"
#include "diff_driver.h"
#include "diff_patch.h"
#include "diff_xdiff.h"
#include "fileops.h"
/* cached information about a hunk in a diff */
typedef struct diff_patch_hunk diff_patch_hunk;
struct diff_patch_hunk {
git_diff_hunk hunk;
size_t line_start;
size_t line_count;
};
struct git_patch {
git_refcount rc;
git_diff *diff; /* for refcount purposes, maybe NULL for blob diffs */
git_diff_delta *delta;
size_t delta_index;
git_diff_file_content ofile;
git_diff_file_content nfile;
uint32_t flags;
git_array_t(diff_patch_hunk) hunks;
git_array_t(git_diff_line) lines;
size_t content_size, context_size, header_size;
git_pool flattened;
};
enum {
GIT_DIFF_PATCH_ALLOCATED = (1 << 0),
GIT_DIFF_PATCH_INITIALIZED = (1 << 1),
GIT_DIFF_PATCH_LOADED = (1 << 2),
GIT_DIFF_PATCH_DIFFABLE = (1 << 3),
GIT_DIFF_PATCH_DIFFED = (1 << 4),
GIT_DIFF_PATCH_FLATTENED = (1 << 5),
};
static void diff_output_init(
git_diff_output*, const git_diff_options*,
git_diff_file_cb, git_diff_hunk_cb, git_diff_line_cb, void*);
static void diff_output_to_patch(git_diff_output *, git_patch *);
static void diff_patch_update_binary(git_patch *patch)
{
if ((patch->delta->flags & DIFF_FLAGS_KNOWN_BINARY) != 0)
return;
if ((patch->ofile.file->flags & GIT_DIFF_FLAG_BINARY) != 0 ||
(patch->nfile.file->flags & GIT_DIFF_FLAG_BINARY) != 0)
patch->delta->flags |= GIT_DIFF_FLAG_BINARY;
else if ((patch->ofile.file->flags & DIFF_FLAGS_NOT_BINARY) != 0 &&
(patch->nfile.file->flags & DIFF_FLAGS_NOT_BINARY) != 0)
patch->delta->flags |= GIT_DIFF_FLAG_NOT_BINARY;
}
static void diff_patch_init_common(git_patch *patch)
{
diff_patch_update_binary(patch);
if ((patch->delta->flags & GIT_DIFF_FLAG_BINARY) != 0)
patch->flags |= GIT_DIFF_PATCH_LOADED; /* LOADED but not DIFFABLE */
patch->flags |= GIT_DIFF_PATCH_INITIALIZED;
if (patch->diff)
git_diff_addref(patch->diff);
}
static int diff_patch_init_from_diff(
git_patch *patch, git_diff *diff, size_t delta_index)
{
int error = 0;
memset(patch, 0, sizeof(*patch));
patch->diff = diff;
patch->delta = git_vector_get(&diff->deltas, delta_index);
patch->delta_index = delta_index;
if ((error = git_diff_file_content__init_from_diff(
&patch->ofile, diff, delta_index, true)) < 0 ||
(error = git_diff_file_content__init_from_diff(
&patch->nfile, diff, delta_index, false)) < 0)
return error;
diff_patch_init_common(patch);
return 0;
}
static int diff_patch_alloc_from_diff(
git_patch **out, git_diff *diff, size_t delta_index)
{
int error;
git_patch *patch = git__calloc(1, sizeof(git_patch));
GITERR_CHECK_ALLOC(patch);
if (!(error = diff_patch_init_from_diff(patch, diff, delta_index))) {
patch->flags |= GIT_DIFF_PATCH_ALLOCATED;
GIT_REFCOUNT_INC(patch);
} else {
git__free(patch);
patch = NULL;
}
*out = patch;
return error;
}
static int diff_patch_load(git_patch *patch, git_diff_output *output)
{
int error = 0;
bool incomplete_data;
if ((patch->flags & GIT_DIFF_PATCH_LOADED) != 0)
return 0;
/* if no hunk and data callbacks and user doesn't care if data looks
* binary, then there is no need to actually load the data
*/
if ((patch->ofile.opts_flags & GIT_DIFF_SKIP_BINARY_CHECK) != 0 &&
output && !output->hunk_cb && !output->data_cb)
return 0;
incomplete_data =
(((patch->ofile.flags & GIT_DIFF_FLAG__NO_DATA) != 0 ||
(patch->ofile.file->flags & GIT_DIFF_FLAG_VALID_OID) != 0) &&
((patch->nfile.flags & GIT_DIFF_FLAG__NO_DATA) != 0 ||
(patch->nfile.file->flags & GIT_DIFF_FLAG_VALID_OID) != 0));
/* always try to load workdir content first because filtering may
* need 2x data size and this minimizes peak memory footprint
*/
if (patch->ofile.src == GIT_ITERATOR_TYPE_WORKDIR) {
if ((error = git_diff_file_content__load(&patch->ofile)) < 0 ||
(patch->ofile.file->flags & GIT_DIFF_FLAG_BINARY) != 0)
goto cleanup;
}
if (patch->nfile.src == GIT_ITERATOR_TYPE_WORKDIR) {
if ((error = git_diff_file_content__load(&patch->nfile)) < 0 ||
(patch->nfile.file->flags & GIT_DIFF_FLAG_BINARY) != 0)
goto cleanup;
}
/* once workdir has been tried, load other data as needed */
if (patch->ofile.src != GIT_ITERATOR_TYPE_WORKDIR) {
if ((error = git_diff_file_content__load(&patch->ofile)) < 0 ||
(patch->ofile.file->flags & GIT_DIFF_FLAG_BINARY) != 0)
goto cleanup;
}
if (patch->nfile.src != GIT_ITERATOR_TYPE_WORKDIR) {
if ((error = git_diff_file_content__load(&patch->nfile)) < 0 ||
(patch->nfile.file->flags & GIT_DIFF_FLAG_BINARY) != 0)
goto cleanup;
}
/* if previously missing an oid, and now that we have it the two sides
* are the same (and not submodules), update MODIFIED -> UNMODIFIED
*/
if (incomplete_data &&
patch->ofile.file->mode == patch->nfile.file->mode &&
patch->ofile.file->mode != GIT_FILEMODE_COMMIT &&
git_oid_equal(&patch->ofile.file->oid, &patch->nfile.file->oid) &&
patch->delta->status == GIT_DELTA_MODIFIED) /* not RENAMED/COPIED! */
patch->delta->status = GIT_DELTA_UNMODIFIED;
cleanup:
diff_patch_update_binary(patch);
if (!error) {
/* patch is diffable only for non-binary, modified files where
* at least one side has data and the data actually changed
*/
if ((patch->delta->flags & GIT_DIFF_FLAG_BINARY) == 0 &&
patch->delta->status != GIT_DELTA_UNMODIFIED &&
(patch->ofile.map.len || patch->nfile.map.len) &&
(patch->ofile.map.len != patch->nfile.map.len ||
!git_oid_equal(&patch->ofile.file->oid, &patch->nfile.file->oid)))
patch->flags |= GIT_DIFF_PATCH_DIFFABLE;
patch->flags |= GIT_DIFF_PATCH_LOADED;
}
return error;
}
static int diff_patch_invoke_file_callback(
git_patch *patch, git_diff_output *output)
{
float progress = patch->diff ?
((float)patch->delta_index / patch->diff->deltas.length) : 1.0f;
if (!output->file_cb)
return 0;
return giterr_set_after_callback_function(
output->file_cb(patch->delta, progress, output->payload),
"git_patch");
}
static int diff_patch_generate(git_patch *patch, git_diff_output *output)
{
int error = 0;
if ((patch->flags & GIT_DIFF_PATCH_DIFFED) != 0)
return 0;
/* if we are not looking at the hunks and lines, don't do the diff */
if (!output->hunk_cb && !output->data_cb)
return 0;
if ((patch->flags & GIT_DIFF_PATCH_LOADED) == 0 &&
(error = diff_patch_load(patch, output)) < 0)
return error;
if ((patch->flags & GIT_DIFF_PATCH_DIFFABLE) == 0)
return 0;
if (output->diff_cb != NULL &&
(error = output->diff_cb(output, patch)) < 0)
patch->flags |= GIT_DIFF_PATCH_DIFFED;
return error;
}
static void diff_patch_free(git_patch *patch)
{
git_diff_file_content__clear(&patch->ofile);
git_diff_file_content__clear(&patch->nfile);
git_array_clear(patch->lines);
git_array_clear(patch->hunks);
git_diff_free(patch->diff); /* decrements refcount */
patch->diff = NULL;
git_pool_clear(&patch->flattened);
if (patch->flags & GIT_DIFF_PATCH_ALLOCATED)
git__free(patch);
}
static int diff_required(git_diff *diff, const char *action)
{
if (diff)
return 0;
giterr_set(GITERR_INVALID, "Must provide valid diff to %s", action);
return -1;
}
int git_diff_foreach(
git_diff *diff,
git_diff_file_cb file_cb,
git_diff_hunk_cb hunk_cb,
git_diff_line_cb data_cb,
void *payload)
{
int error = 0;
git_xdiff_output xo;
size_t idx;
git_patch patch;
if ((error = diff_required(diff, "git_diff_foreach")) < 0)
return error;
memset(&xo, 0, sizeof(xo));
diff_output_init(
&xo.output, &diff->opts, file_cb, hunk_cb, data_cb, payload);
git_xdiff_init(&xo, &diff->opts);
git_vector_foreach(&diff->deltas, idx, patch.delta) {
/* check flags against patch status */
if (git_diff_delta__should_skip(&diff->opts, patch.delta))
continue;
if ((error = diff_patch_init_from_diff(&patch, diff, idx)) < 0)
break;
if (!(error = diff_patch_invoke_file_callback(&patch, &xo.output)))
error = diff_patch_generate(&patch, &xo.output);
git_patch_free(&patch);
if (error)
break;
}
return error;
}
typedef struct {
git_patch patch;
git_diff_delta delta;
char paths[GIT_FLEX_ARRAY];
} diff_patch_with_delta;
static int diff_single_generate(diff_patch_with_delta *pd, git_xdiff_output *xo)
{
int error = 0;
git_patch *patch = &pd->patch;
bool has_old = ((patch->ofile.flags & GIT_DIFF_FLAG__NO_DATA) == 0);
bool has_new = ((patch->nfile.flags & GIT_DIFF_FLAG__NO_DATA) == 0);
pd->delta.status = has_new ?
(has_old ? GIT_DELTA_MODIFIED : GIT_DELTA_ADDED) :
(has_old ? GIT_DELTA_DELETED : GIT_DELTA_UNTRACKED);
if (git_oid_equal(&patch->nfile.file->oid, &patch->ofile.file->oid))
pd->delta.status = GIT_DELTA_UNMODIFIED;
patch->delta = &pd->delta;
diff_patch_init_common(patch);
if (pd->delta.status == GIT_DELTA_UNMODIFIED &&
!(patch->ofile.opts_flags & GIT_DIFF_INCLUDE_UNMODIFIED))
return error;
error = diff_patch_invoke_file_callback(patch, (git_diff_output *)xo);
if (!error)
error = diff_patch_generate(patch, (git_diff_output *)xo);
return error;
}
static int diff_patch_from_blobs(
diff_patch_with_delta *pd,
git_xdiff_output *xo,
const git_blob *old_blob,
const char *old_path,
const git_blob *new_blob,
const char *new_path,
const git_diff_options *opts)
{
int error = 0;
git_repository *repo =
new_blob ? git_object_owner((const git_object *)new_blob) :
old_blob ? git_object_owner((const git_object *)old_blob) : NULL;
GITERR_CHECK_VERSION(opts, GIT_DIFF_OPTIONS_VERSION, "git_diff_options");
if (opts && (opts->flags & GIT_DIFF_REVERSE) != 0) {
const git_blob *tmp_blob;
const char *tmp_path;
tmp_blob = old_blob; old_blob = new_blob; new_blob = tmp_blob;
tmp_path = old_path; old_path = new_path; new_path = tmp_path;
}
pd->patch.delta = &pd->delta;
pd->delta.old_file.path = old_path;
pd->delta.new_file.path = new_path;
if ((error = git_diff_file_content__init_from_blob(
&pd->patch.ofile, repo, opts, old_blob, &pd->delta.old_file)) < 0 ||
(error = git_diff_file_content__init_from_blob(
&pd->patch.nfile, repo, opts, new_blob, &pd->delta.new_file)) < 0)
return error;
return diff_single_generate(pd, xo);
}
static int diff_patch_with_delta_alloc(
diff_patch_with_delta **out,
const char **old_path,
const char **new_path)
{
diff_patch_with_delta *pd;
size_t old_len = *old_path ? strlen(*old_path) : 0;
size_t new_len = *new_path ? strlen(*new_path) : 0;
*out = pd = git__calloc(1, sizeof(*pd) + old_len + new_len + 2);
GITERR_CHECK_ALLOC(pd);
pd->patch.flags = GIT_DIFF_PATCH_ALLOCATED;
if (*old_path) {
memcpy(&pd->paths[0], *old_path, old_len);
*old_path = &pd->paths[0];
} else if (*new_path)
*old_path = &pd->paths[old_len + 1];
if (*new_path) {
memcpy(&pd->paths[old_len + 1], *new_path, new_len);
*new_path = &pd->paths[old_len + 1];
} else if (*old_path)
*new_path = &pd->paths[0];
return 0;
}
int git_diff_blobs(
const git_blob *old_blob,
const char *old_path,
const git_blob *new_blob,
const char *new_path,
const git_diff_options *opts,
git_diff_file_cb file_cb,
git_diff_hunk_cb hunk_cb,
git_diff_line_cb data_cb,
void *payload)
{
int error = 0;
diff_patch_with_delta pd;
git_xdiff_output xo;
memset(&xo, 0, sizeof(xo));
diff_output_init(
&xo.output, opts, file_cb, hunk_cb, data_cb, payload);
git_xdiff_init(&xo, opts);
if (!old_path && new_path)
old_path = new_path;
else if (!new_path && old_path)
new_path = old_path;
memset(&pd, 0, sizeof(pd));
error = diff_patch_from_blobs(
&pd, &xo, old_blob, old_path, new_blob, new_path, opts);
git_patch_free(&pd.patch);
return error;
}
int git_patch_from_blobs(
git_patch **out,
const git_blob *old_blob,
const char *old_path,
const git_blob *new_blob,
const char *new_path,
const git_diff_options *opts)
{
int error = 0;
diff_patch_with_delta *pd;
git_xdiff_output xo;
assert(out);
*out = NULL;
if (diff_patch_with_delta_alloc(&pd, &old_path, &new_path) < 0)
return -1;
memset(&xo, 0, sizeof(xo));
diff_output_to_patch(&xo.output, &pd->patch);
git_xdiff_init(&xo, opts);
error = diff_patch_from_blobs(
pd, &xo, old_blob, old_path, new_blob, new_path, opts);
if (!error)
*out = (git_patch *)pd;
else
git_patch_free((git_patch *)pd);
return error;
}
static int diff_patch_from_blob_and_buffer(
diff_patch_with_delta *pd,
git_xdiff_output *xo,
const git_blob *old_blob,
const char *old_path,
const char *buf,
size_t buflen,
const char *buf_path,
const git_diff_options *opts)
{
int error = 0;
git_repository *repo =
old_blob ? git_object_owner((const git_object *)old_blob) : NULL;
GITERR_CHECK_VERSION(opts, GIT_DIFF_OPTIONS_VERSION, "git_diff_options");
pd->patch.delta = &pd->delta;
if (opts && (opts->flags & GIT_DIFF_REVERSE) != 0) {
pd->delta.old_file.path = buf_path;
pd->delta.new_file.path = old_path;
if (!(error = git_diff_file_content__init_from_raw(
&pd->patch.ofile, repo, opts, buf, buflen, &pd->delta.old_file)))
error = git_diff_file_content__init_from_blob(
&pd->patch.nfile, repo, opts, old_blob, &pd->delta.new_file);
} else {
pd->delta.old_file.path = old_path;
pd->delta.new_file.path = buf_path;
if (!(error = git_diff_file_content__init_from_blob(
&pd->patch.ofile, repo, opts, old_blob, &pd->delta.old_file)))
error = git_diff_file_content__init_from_raw(
&pd->patch.nfile, repo, opts, buf, buflen, &pd->delta.new_file);
}
if (error < 0)
return error;
return diff_single_generate(pd, xo);
}
int git_diff_blob_to_buffer(
const git_blob *old_blob,
const char *old_path,
const char *buf,
size_t buflen,
const char *buf_path,
const git_diff_options *opts,
git_diff_file_cb file_cb,
git_diff_hunk_cb hunk_cb,
git_diff_line_cb data_cb,
void *payload)
{
int error = 0;
diff_patch_with_delta pd;
git_xdiff_output xo;
memset(&xo, 0, sizeof(xo));
diff_output_init(
&xo.output, opts, file_cb, hunk_cb, data_cb, payload);
git_xdiff_init(&xo, opts);
if (!old_path && buf_path)
old_path = buf_path;
else if (!buf_path && old_path)
buf_path = old_path;
memset(&pd, 0, sizeof(pd));
error = diff_patch_from_blob_and_buffer(
&pd, &xo, old_blob, old_path, buf, buflen, buf_path, opts);
git_patch_free(&pd.patch);
return error;
}
int git_patch_from_blob_and_buffer(
git_patch **out,
const git_blob *old_blob,
const char *old_path,
const char *buf,
size_t buflen,
const char *buf_path,
const git_diff_options *opts)
{
int error = 0;
diff_patch_with_delta *pd;
git_xdiff_output xo;
assert(out);
*out = NULL;
if (diff_patch_with_delta_alloc(&pd, &old_path, &buf_path) < 0)
return -1;
memset(&xo, 0, sizeof(xo));
diff_output_to_patch(&xo.output, &pd->patch);
git_xdiff_init(&xo, opts);
error = diff_patch_from_blob_and_buffer(
pd, &xo, old_blob, old_path, buf, buflen, buf_path, opts);
if (!error)
*out = (git_patch *)pd;
else
git_patch_free((git_patch *)pd);
return error;
}
int git_patch_from_diff(
git_patch **patch_ptr, git_diff *diff, size_t idx)
{
int error = 0;
git_xdiff_output xo;
git_diff_delta *delta = NULL;
git_patch *patch = NULL;
if (patch_ptr) *patch_ptr = NULL;
if (diff_required(diff, "git_patch_from_diff") < 0)
return -1;
delta = git_vector_get(&diff->deltas, idx);
if (!delta) {
giterr_set(GITERR_INVALID, "Index out of range for delta in diff");
return GIT_ENOTFOUND;
}
if (git_diff_delta__should_skip(&diff->opts, delta))
return 0;
/* don't load the patch data unless we need it for binary check */
if (!patch_ptr &&
((delta->flags & DIFF_FLAGS_KNOWN_BINARY) != 0 ||
(diff->opts.flags & GIT_DIFF_SKIP_BINARY_CHECK) != 0))
return 0;
if ((error = diff_patch_alloc_from_diff(&patch, diff, idx)) < 0)
return error;
memset(&xo, 0, sizeof(xo));
diff_output_to_patch(&xo.output, patch);
git_xdiff_init(&xo, &diff->opts);
error = diff_patch_invoke_file_callback(patch, &xo.output);
if (!error)
error = diff_patch_generate(patch, &xo.output);
if (!error) {
/* TODO: if cumulative diff size is < 0.5 total size, flatten patch */
/* TODO: and unload the file content */
}
if (error || !patch_ptr)
git_patch_free(patch);
else
*patch_ptr = patch;
return error;
}
void git_patch_free(git_patch *patch)
{
if (patch)
GIT_REFCOUNT_DEC(patch, diff_patch_free);
}
const git_diff_delta *git_patch_get_delta(git_patch *patch)
{
assert(patch);
return patch->delta;
}
size_t git_patch_num_hunks(git_patch *patch)
{
assert(patch);
return git_array_size(patch->hunks);
}
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;
}
static int diff_error_outofrange(const char *thing)
{
giterr_set(GITERR_INVALID, "Diff 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)
{
diff_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 diff_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(git_patch *patch, size_t hunk_idx)
{
diff_patch_hunk *hunk;
assert(patch);
if (!(hunk = git_array_get(patch->hunks, hunk_idx)))
return diff_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)
{
diff_patch_hunk *hunk;
git_diff_line *line;
assert(patch);
if (!(hunk = git_array_get(patch->hunks, hunk_idx))) {
if (out) *out = NULL;
return diff_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 diff_error_outofrange("line");
}
if (out) *out = line;
return 0;
}
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;
}
git_diff *git_patch__diff(git_patch *patch)
{
return patch->diff;
}
git_diff_driver *git_patch__driver(git_patch *patch)
{
/* ofile driver is representative for whole patch */
return patch->ofile.driver;
}
void git_patch__old_data(
char **ptr, size_t *len, git_patch *patch)
{
*ptr = patch->ofile.map.data;
*len = patch->ofile.map.len;
}
void git_patch__new_data(
char **ptr, size_t *len, git_patch *patch)
{
*ptr = patch->nfile.map.data;
*len = patch->nfile.map.len;
}
int git_patch__invoke_callbacks(
git_patch *patch,
git_diff_file_cb file_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 (!hunk_cb && !line_cb)
return error;
for (i = 0; !error && i < git_array_size(patch->hunks); ++i) {
diff_patch_hunk *h = git_array_get(patch->hunks, i);
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;
}
static int diff_patch_file_cb(
const git_diff_delta *delta,
float progress,
void *payload)
{
GIT_UNUSED(delta); GIT_UNUSED(progress); GIT_UNUSED(payload);
return 0;
}
static int diff_patch_hunk_cb(
const git_diff_delta *delta,
const git_diff_hunk *hunk_,
void *payload)
{
git_patch *patch = payload;
diff_patch_hunk *hunk;
GIT_UNUSED(delta);
hunk = git_array_alloc(patch->hunks);
GITERR_CHECK_ALLOC(hunk);
memcpy(&hunk->hunk, hunk_, sizeof(hunk->hunk));
patch->header_size += hunk_->header_len;
hunk->line_start = git_array_size(patch->lines);
hunk->line_count = 0;
return 0;
}
static int diff_patch_line_cb(
const git_diff_delta *delta,
const git_diff_hunk *hunk_,
const git_diff_line *line_,
void *payload)
{
git_patch *patch = payload;
diff_patch_hunk *hunk;
git_diff_line *line;
GIT_UNUSED(delta);
GIT_UNUSED(hunk_);
hunk = git_array_last(patch->hunks);
assert(hunk); /* programmer error if no hunk is available */
line = git_array_alloc(patch->lines);
GITERR_CHECK_ALLOC(line);
memcpy(line, line_, sizeof(*line));
/* do some bookkeeping so we can provide old/new line numbers */
patch->content_size += line->content_len;
if (line->origin == GIT_DIFF_LINE_ADDITION ||
line->origin == GIT_DIFF_LINE_DELETION)
patch->content_size += 1;
else if (line->origin == GIT_DIFF_LINE_CONTEXT) {
patch->content_size += 1;
patch->context_size += line->content_len + 1;
} else if (line->origin == GIT_DIFF_LINE_CONTEXT_EOFNL)
patch->context_size += line->content_len;
hunk->line_count++;
return 0;
}
static void diff_output_init(
git_diff_output *out,
const git_diff_options *opts,
git_diff_file_cb file_cb,
git_diff_hunk_cb hunk_cb,
git_diff_line_cb data_cb,
void *payload)
{
GIT_UNUSED(opts);
memset(out, 0, sizeof(*out));
out->file_cb = file_cb;
out->hunk_cb = hunk_cb;
out->data_cb = data_cb;
out->payload = payload;
}
static void diff_output_to_patch(git_diff_output *out, git_patch *patch)
{
diff_output_init(
out, NULL,
diff_patch_file_cb, diff_patch_hunk_cb, diff_patch_line_cb, patch);
}
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