int git_futils_mmap_ro_file(git_map *out, const char *path)
{
git_file fd = git_futils_open_ro(path);
git_off_t len;
int result;
if (fd < 0)
return fd;
if ((len = git_futils_filesize(fd)) < 0) {
result = -1;
goto out;
}
if (!git__is_sizet(len)) {
giterr_set(GITERR_OS, "file `%s` too large to mmap", path);
result = -1;
goto out;
}
result = git_futils_mmap_ro(out, fd, 0, (size_t)len);
out:
p_close(fd);
return result;
}
static int diff_file_content_load_workdir_file(
git_diff_file_content *fc,
git_buf *path,
git_diff_options *diff_opts)
{
int error = 0;
git_filter_list *fl = NULL;
git_file fd = git_futils_open_ro(git_buf_cstr(path));
git_buf raw = GIT_BUF_INIT;
if (fd < 0)
return fd;
if (!fc->file->size &&
!(fc->file->size = git_futils_filesize(fd)))
goto cleanup;
if ((diff_opts->flags & GIT_DIFF_SHOW_BINARY) == 0 &&
diff_file_content_binary_by_size(fc))
goto cleanup;
if ((error = git_filter_list_load(
&fl, fc->repo, NULL, fc->file->path,
GIT_FILTER_TO_ODB, GIT_FILTER_ALLOW_UNSAFE)) < 0)
goto cleanup;
/* if there are no filters, try to mmap the file */
if (fl == NULL) {
if (!(error = git_futils_mmap_ro(
&fc->map, fd, 0, (size_t)fc->file->size))) {
fc->flags |= GIT_DIFF_FLAG__UNMAP_DATA;
goto cleanup;
}
/* if mmap failed, fall through to try readbuffer below */
giterr_clear();
}
if (!(error = git_futils_readbuffer_fd(&raw, fd, (size_t)fc->file->size))) {
git_buf out = GIT_BUF_INIT;
error = git_filter_list_apply_to_data(&out, fl, &raw);
if (out.ptr != raw.ptr)
git_buf_dispose(&raw);
if (!error) {
fc->map.len = out.size;
fc->map.data = out.ptr;
fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
}
}
cleanup:
git_filter_list_free(fl);
p_close(fd);
return error;
}
static int diff_file_content_load_workdir_file(
git_diff_file_content *fc, git_buf *path)
{
int error = 0;
git_vector filters = GIT_VECTOR_INIT;
git_buf raw = GIT_BUF_INIT, filtered = GIT_BUF_INIT;
git_file fd = git_futils_open_ro(git_buf_cstr(path));
if (fd < 0)
return fd;
if (!fc->file->size &&
!(fc->file->size = git_futils_filesize(fd)))
goto cleanup;
if (diff_file_content_binary_by_size(fc))
goto cleanup;
if ((error = git_filters_load(
&filters, fc->repo, fc->file->path, GIT_FILTER_TO_ODB)) < 0)
goto cleanup;
/* error >= is a filter count */
if (error == 0) {
if (!(error = git_futils_mmap_ro(
&fc->map, fd, 0, (size_t)fc->file->size)))
fc->flags |= GIT_DIFF_FLAG__UNMAP_DATA;
else /* fall through to try readbuffer below */
giterr_clear();
}
if (error != 0) {
error = git_futils_readbuffer_fd(&raw, fd, (size_t)fc->file->size);
if (error < 0)
goto cleanup;
if (!filters.length)
git_buf_swap(&filtered, &raw);
else
error = git_filters_apply(&filtered, &raw, &filters);
if (!error) {
fc->map.len = git_buf_len(&filtered);
fc->map.data = git_buf_detach(&filtered);
fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
}
git_buf_free(&raw);
git_buf_free(&filtered);
}
cleanup:
git_filters_free(&filters);
p_close(fd);
return error;
}
int git_odb_hashfile(git_oid *out, const char *path, git_otype type)
{
git_off_t size;
int result, fd = git_futils_open_ro(path);
if (fd < 0)
return fd;
if ((size = git_futils_filesize(fd)) < 0 || !git__is_sizet(size)) {
giterr_set(GITERR_OS, "File size overflow for 32-bit systems");
p_close(fd);
return -1;
}
result = git_odb__hashfd(out, fd, (size_t)size, type);
p_close(fd);
return result;
}