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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 "diff_parse.h"

#include "diff.h"

#include "patch.h"

#include "patch_parse.h"

static void diff_parsed_free(git_diff *d)

{

git_diff_parsed *diff = (git_diff_parsed *)d;

git_patch *patch;

size_t i;

git_vector_foreach(&diff->patches, i, patch)

git_patch_free(patch);

git_vector_free(&diff->patches);

git_vector_free(&diff->base.deltas);

git_pool_clear(&diff->base.pool);

git__memzero(diff, sizeof(*diff));

git__free(diff);

}

static git_diff_parsed *diff_parsed_alloc(void)

{

git_diff_parsed *diff;

if ((diff = git__calloc(1, sizeof(git_diff_parsed))) == NULL)

return NULL;

GIT_REFCOUNT_INC(&diff->base);

diff->base.type = GIT_DIFF_TYPE_PARSED;

diff->base.strcomp = git__strcmp;

diff->base.strncomp = git__strncmp;

diff->base.pfxcomp = git__prefixcmp;

diff->base.entrycomp = git_diff__entry_cmp;

diff->base.patch_fn = git_patch_parsed_from_diff;

diff->base.free_fn = diff_parsed_free;

if (git_diff_init_options(&diff->base.opts, GIT_DIFF_OPTIONS_VERSION) < 0) {

git__free(diff);

return NULL;

}

diff->base.opts.flags &= ~GIT_DIFF_IGNORE_CASE;

git_pool_init(&diff->base.pool, 1);

if (git_vector_init(&diff->patches, 0, NULL) < 0 ||

git_vector_init(&diff->base.deltas, 0, git_diff_delta__cmp) < 0) {

git_diff_free(&diff->base);

return NULL;

}

git_vector_set_cmp(&diff->base.deltas, git_diff_delta__cmp);

return diff;

}

int git_diff_from_buffer(

git_diff **out,

const char *content,

size_t content_len)

{

git_diff_parsed *diff;

git_patch *patch;

git_patch_parse_ctx *ctx = NULL;

int error = 0;

*out = NULL;

diff = diff_parsed_alloc();

GITERR_CHECK_ALLOC(diff);

ctx = git_patch_parse_ctx_init(content, content_len, NULL);

GITERR_CHECK_ALLOC(ctx);

while (ctx->parse_ctx.remain_len) {

if ((error = git_patch_parse(&patch, ctx)) < 0)

break;

git_vector_insert(&diff->patches, patch);

git_vector_insert(&diff->base.deltas, patch->delta);

}

if (error == GIT_ENOTFOUND && git_vector_length(&diff->patches) > 0) {

giterr_clear();

error = 0;

}

git_patch_parse_ctx_free(ctx);

if (error < 0)

git_diff_free(&diff->base);

else

*out = &diff->base;

return error;

}