Saran Tunyasuvunakool
0e5ce18cff
The C++ standard library `std::istringstream` is not guaranteed to parse "inf" and "nan" as valid floating point numbers. In our testing, libc++ does this, but libstdc++ and MSVCRT do not. PiperOrigin-RevId: 455435431 Change-Id: I99c00303b08c2e4e62acfa3ca52a21a3008f4545
968 lines
22 KiB
C++
968 lines
22 KiB
C++
// Copyright 2021 DeepMind Technologies Limited
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <cfloat>
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#include <cmath>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <limits>
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#include <optional>
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#include <sstream>
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#include <string>
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#include <type_traits>
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#include <vector>
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#include "cc/array_safety.h"
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#include "engine/engine_util_errmem.h"
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#include "xml/xml_util.h"
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#include "xml/xml_numeric_format.h"
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namespace {
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using std::istringstream;
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using std::size_t;
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using std::string;
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using std::stringstream;
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using std::vector;
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using tinyxml2::XMLAttribute;
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using tinyxml2::XMLElement;
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namespace mju = ::mujoco::util;
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template <typename T>
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std::optional<T> ParseInfOrNan(const std::string& s) {
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const char* str = s.c_str();
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if constexpr (std::is_floating_point_v<T>) {
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T sign = 1;
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if (s.size() == 4 && s[0] == '-') {
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sign = -1;
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++str;
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} else if (s.size() != 3) {
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return std::nullopt;
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}
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if (std::numeric_limits<T>::has_infinity &&
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(str[0] == 'i' || str[0] == 'I') &&
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(str[1] == 'n' || str[1] == 'N') &&
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(str[2] == 'f' || str[2] == 'F')) {
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return sign * std::numeric_limits<T>::infinity();
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} else if (std::numeric_limits<T>::has_quiet_NaN &&
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(str[0] == 'n' || str[0] == 'N') &&
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(str[1] == 'a' || str[1] == 'A') &&
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(str[2] == 'n' || str[2] == 'N')) {
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return sign * std::numeric_limits<T>::quiet_NaN();
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}
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}
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return std::nullopt;
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}
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} // namespace
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//---------------------------------- utility functions ---------------------------------------------
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// error string copy
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void mjCopyError(char* dst, const char* src, int maxlen) {
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if (dst && maxlen>0) {
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strncpy(dst, src, maxlen);
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dst[maxlen-1] = 0;
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}
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}
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// error constructor
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mjXError::mjXError(const XMLElement* elem, const char* msg, const char* str, int pos) {
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char temp[500];
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// construct error message
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mju::sprintf_arr(message, "XML Error");
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if (msg) {
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mju::sprintf_arr(temp, msg, str, pos);
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mju::strcat_arr(message, ": ");
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mju::strcat_arr(message, temp);
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}
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// append element, line numbers
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if (elem) {
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mju::sprintf_arr(temp, "\nElement '%s', line %d\n", elem->Value(), elem->GetLineNum());
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mju::strcat_arr(message, temp);
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}
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}
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//---------------------------------- class mjXSchema implementation --------------------------------
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// constructor
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mjXSchema::mjXSchema(const char* schema[][mjXATTRNUM], int nrow, bool checkptr) {
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// clear fields
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name.clear();
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type = '?';
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child.clear();
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attr.clear();
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error.clear();
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// checks nrow and first element
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if (nrow<1) {
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error = "number of rows must be positive";
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return;
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}
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if (schema[0][0][0]=='<' || schema[0][0][0]=='>') {
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error = "expected element, found bracket";
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return;
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}
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// check entire schema for null pointers
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if (checkptr) {
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char msg[100];
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for (int i=0; i<nrow; i++) {
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// base pointers
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if (!schema[i] || !schema[i][0]) {
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mju::sprintf_arr(msg, "null pointer found in row %d", i);
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error = msg;
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return;
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}
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// detect element
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if (schema[i][0][0]!='<' && schema[i][0][0]!='>') {
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// first 3 pointers required
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if (!schema[i][1] || !schema[i][2]) {
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mju::sprintf_arr(msg, "null pointer in row %d, element %s", i, schema[i][0]);
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error = msg;
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return;
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}
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// check type
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if (schema[i][1][0]!='!' && schema[i][1][0]!='?' &&
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schema[i][1][0]!='*' && schema[i][1][0]!='R') {
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mju::sprintf_arr(msg, "invalid type in row %d, element %s", i, schema[i][0]);
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error = msg;
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return;
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}
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// number of attributes
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int nattr = atoi(schema[i][2]);
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if (nattr<0 || nattr>mjXATTRNUM-3) {
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mju::sprintf_arr(msg,
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"invalid number of attributes in row %d, element %s", i, schema[i][0]);
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error = msg;
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return;
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}
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// attribute pointers
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for (int j=0; j<nattr; j++) {
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if (!schema[i][3+j]) {
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mju::sprintf_arr(msg, "null attribute %d in row %d, element %s", j, i, schema[i][0]);
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error = msg;
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return;
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}
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}
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}
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}
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}
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// set name and type
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name = schema[0][0];
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type = schema[0][1][0];
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// set attributes
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int nattr = atoi(schema[0][2]);
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for (int i=0; i<nattr; i++) {
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attr.push_back(schema[0][3+i]);
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}
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// process sub-elements of complex element
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if (nrow>1) {
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// check for bracketed block
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if (schema[1][0][0]!='<' || schema[nrow-1][0][0]!='>') {
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error = "expected brackets after complex element";
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return;
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}
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// parse block into simple and complex elements, create children
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int start = 2;
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while (start < nrow-1) {
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int end = start;
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// look for bracketed block at start+1
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if (schema[start+1][0][0]=='<') {
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// look for corresponding closing bracket
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int cnt = 0;
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while (end <= nrow-1) {
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if (schema[end][0][0]=='<') {
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cnt++;
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} else if (schema[end][0][0]=='>') {
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cnt--;
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if (cnt==0) {
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break;
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}
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}
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end++;
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}
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// closing bracket not found
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if (end > nrow-1) {
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error = "matching closing bracket not found";
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return;
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}
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}
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// add element, check for error
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mjXSchema* elem = new mjXSchema(schema+start, end-start+1, false);
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child.push_back(elem);
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if (!elem->error.empty()) {
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error = elem->error;
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return;
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}
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// proceed with next subelement
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start = end+1;
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}
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}
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}
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// destructor
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mjXSchema::~mjXSchema() {
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// delete children recursively
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for (unsigned int i=0; i<child.size(); i++) {
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delete child[i];
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}
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// clear fields
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child.clear();
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attr.clear();
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error.clear();
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}
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// get pointer to error message
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string mjXSchema::GetError(void) {
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return error;
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}
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// print spaces
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static void printspace(std::stringstream& str, int n, const char* space) {
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for (int i=0; i<n; i++) {
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str << space;
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}
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}
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// max
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static int _max(int a, int b) {
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if (a>b) {
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return a;
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} else {
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return b;
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}
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}
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// print schema as text
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void mjXSchema::Print(std::stringstream& str, int level) {
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int i;
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// replace body with (world)body
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string name1 = (name=="body" ? "(world)body" : name);
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// space, name, type
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printspace(str, 3*level, " ");
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str << name1 << " (" << type << ")";
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int baselen = 3*level + (int)name1.size() + 4;
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if (baselen<30) {
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printspace(str, 30-baselen, " ");
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}
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// attributes
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int cnt = _max(baselen, 30);
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for (i=0; i<(int)attr.size(); i++) {
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if (cnt>60) {
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str << "\n";
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printspace(str, (cnt = _max(30, baselen)), " ");
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}
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str << attr[i] << " ";
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cnt += (int)attr[i].size() + 1;
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}
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str << "\n";
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// children
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for (i=0; i<(int)child.size(); i++) {
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child[i]->Print(str, level+1);
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}
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}
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// print schema as HTML table
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void mjXSchema::PrintHTML(std::stringstream& str, int level, bool pad) {
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int i;
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// replace body with (world)body
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string name1 = (name=="body" ? "(world)body" : name);
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// open table
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if (level==0) {
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str << "<table border=\"1\">\n";
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}
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// name: with HTML padding
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if (pad) {
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str << "<tr>\n\t<td style=\"padding-left:" << 5 + 15*level;
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str << "\" bgcolor=\"#EEEEEE\" class=\"el\">" << name1 << "</td>\n";
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}
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// name: with for browsers that ignore padding
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else {
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str << "<tr>\n\t<td bgcolor=\"#EEEEEE\" class=\"el\">";
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if (level) {
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printspace(str, 4*level, " ");
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}
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str << name1 << "</td>\n";
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}
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// type
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str << "\t<td class=\"ty\">" << type << "</td>\n";
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// attributes
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str << "\t<td class=\"at\">";
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if (!attr.empty()) {
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for (i=0; i<(int)attr.size(); i++) {
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str << attr[i] << " ";
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}
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} else {
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str << "<span style=\"color:black\"><i>no attributes</i></span>";
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}
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str << "</td>\n</tr>\n";
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// children
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for (i=0; i<(int)child.size(); i++) {
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child[i]->PrintHTML(str, level+1, pad);
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}
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// close table
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if (level==0) {
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str << "</table>\n";
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}
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}
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// check for name match
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bool mjXSchema::NameMatch(XMLElement* elem, int level) {
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// special handling of body and worldbody
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if (name=="body") {
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if (level==1 && !strcmp(elem->Value(), "worldbody")) {
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return true;
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}
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if (level!=1 && !strcmp(elem->Value(), "body")) {
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return true;
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}
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return false;
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}
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// regular check
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return (name==elem->Value());
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}
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// validator
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XMLElement* mjXSchema::Check(XMLElement* elem, int level) {
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int i;
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bool missing;
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char msg[100];
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XMLElement *bad, *sub;
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error.clear();
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if (!elem) {
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return 0; // SHOULD NOT OCCUR
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}
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// check name (already done by parent, but hard to avoid)
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if (!NameMatch(elem, level)) {
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error = "unrecognized element";
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return elem;
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}
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// check attributes
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const XMLAttribute* attribute = elem->FirstAttribute();
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while (attribute) {
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missing = true;
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for (i=0; i<(int)attr.size(); i++) {
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if (attr[i]==attribute->Name()) {
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missing = false;
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break;
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}
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}
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if (missing) {
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error = "unrecognized attribute: '" + string(attribute->Name()) + "'";
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return elem;
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}
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// next attribute
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attribute = attribute->Next();
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}
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// handle recursion
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if (type=='R') {
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// loop over sub-elements with same name
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sub = elem->FirstChildElement((const char*)name.c_str());
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while (sub) {
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// check sub-tree
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if ((bad = Check(sub, level+1))) {
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return bad;
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}
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// advance to next sub-element with same name
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sub = sub->NextSiblingElement((const char*)name.c_str());
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}
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}
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// clear reference counts
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for (i=0; i<(int)child.size(); i++) {
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child[i]->refcnt = 0;
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}
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// check sub-elements, update refcnt
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sub = elem->FirstChildElement();
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while (sub) {
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// find in child array, update refcnt
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missing = true;
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for (i=0; i<(int)child.size(); i++) {
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if (child[i]->NameMatch(sub, level+1)) {
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// check sub-tree
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if ((bad = child[i]->Check(sub, level+1))) {
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error = child[i]->error;
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return bad;
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}
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// mark found
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missing = false;
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child[i]->refcnt++;
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break;
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}
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}
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// missing, unless recursive
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if (missing && !(type=='R' && NameMatch(sub, level+1))) {
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error = "unrecognized element";
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return sub;
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}
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// advance to next sub-element
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sub = sub->NextSiblingElement();
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}
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// enforce sub-element types
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msg[0] = 0;
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for (i=0; i<(int)child.size(); i++) {
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switch (child[i]->type) {
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case '!':
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if (child[i]->refcnt != 1)
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mju::sprintf_arr(msg, "required sub-element '%s' found %d time(s)",
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child[i]->name.c_str(), child[i]->refcnt);
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break;
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case '?':
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if (child[i]->refcnt > 1)
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mju::sprintf_arr(msg, "unique sub-element '%s' found %d time(s)",
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child[i]->name.c_str(), child[i]->refcnt);
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break;
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default:
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break;
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}
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}
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// handle error
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if (msg[0]) {
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error = msg;
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return elem;
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} else {
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return 0;
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}
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}
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//---------------------------------- class mjXUtil implementation ----------------------------------
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// compare two vectors
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template<typename T>
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bool mjXUtil::SameVector(const T* vec1, const T* vec2, int n) {
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if (!vec1 || !vec2) {
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return false;
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}
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bool same = true;
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for (int i=0; i<n; i++) {
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if (std::abs(vec1[i] - vec2[i]) > std::numeric_limits<T>::epsilon()) {
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same = false;
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}
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}
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return same;
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}
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template bool mjXUtil::SameVector(const double* vec1, const double* vec2, int n);
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template bool mjXUtil::SameVector(const float* vec1, const float* vec2, int n);
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template bool mjXUtil::SameVector(const int* vec1, const int* vec2, int n);
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template bool mjXUtil::SameVector(const mjtByte* vec1, const mjtByte* vec2, int n);
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// find string in map, return corresponding integer (-1: not found)
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int mjXUtil::FindKey(const mjMap* map, int mapsz, string key) {
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for (int i=0; i<mapsz; i++) {
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if (map[i].key == key) {
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return map[i].value;
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}
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}
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return -1;
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}
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// find integer in map, return corresponding string ("": not found)
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string mjXUtil::FindValue(const mjMap* map, int mapsz, int value) {
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for (int i=0; i<mapsz; i++) {
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if (map[i].value == value) {
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return map[i].key;
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}
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}
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return "";
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}
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// read attribute "attr" of element "elem"
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// "len" is the number of floats or doubles to be read
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// the content is returned in "text", the numeric data in "data"
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// return true if attribute found, false if not found and not required
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template<typename T>
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int mjXUtil::ReadAttr(XMLElement* elem, const char* attr, const int len,
|
|
T* data, string& text, bool required, bool exact) {
|
|
const char* pstr = elem->Attribute(attr);
|
|
|
|
// check if attribute exists
|
|
if (!pstr) {
|
|
if (required) {
|
|
throw mjXError(elem, "required attribute missing: '%s'", attr);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// convert to string
|
|
text = string(pstr);
|
|
|
|
// get input stream
|
|
istringstream strm(text);
|
|
std::string token;
|
|
|
|
// read numbers
|
|
int i = 0;
|
|
while (!strm.eof() && i < len) {
|
|
strm >> token;
|
|
istringstream token_strm(token);
|
|
token_strm >> data[i];
|
|
if (token_strm.fail() || !token_strm.eof()) {
|
|
// C++ standard libraries do not always parse inf and nan as valid floating point values.
|
|
std::optional<T> maybe_result = ParseInfOrNan<T>(token);
|
|
if (maybe_result.has_value()) {
|
|
data[i] = *maybe_result;
|
|
} else {
|
|
throw mjXError(elem, "problem reading attribute '%s'", attr);
|
|
}
|
|
}
|
|
if constexpr (std::is_floating_point_v<T>) {
|
|
if (std::isnan(data[i])) {
|
|
mju_warning("XML contains a 'NaN'. Please check it carefully.");
|
|
}
|
|
}
|
|
++i;
|
|
}
|
|
strm >> std::ws;
|
|
|
|
// check if there is not enough data
|
|
if (exact && i < len) {
|
|
throw mjXError(elem, "attribute '%s' does not have enough data", attr);
|
|
}
|
|
|
|
// check if there is too much data
|
|
if (!strm.eof()) {
|
|
throw mjXError(elem, "attribute '%s' has too much data", attr);
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
template int mjXUtil::ReadAttr(XMLElement* elem, const char* attr, const int len,
|
|
double* data, string& text, bool required, bool exact);
|
|
|
|
template int mjXUtil::ReadAttr(XMLElement* elem, const char* attr, const int len,
|
|
float* data, string& text, bool required, bool exact);
|
|
|
|
template int mjXUtil::ReadAttr(XMLElement* elem, const char* attr, const int len,
|
|
int* data, string& text, bool required, bool exact);
|
|
|
|
template int mjXUtil::ReadAttr(XMLElement* elem, const char* attr, const int len,
|
|
mjtByte* data, string& text, bool required, bool exact);
|
|
|
|
|
|
|
|
// read DOUBLE array into C++ vector, return number read
|
|
int mjXUtil::ReadVector(XMLElement* elem, const char* attr,
|
|
vector<double>& vec, string& text, bool required) {
|
|
double buffer[1000];
|
|
int n = ReadAttr(elem, attr, 1000, buffer, text, required, false);
|
|
if (n>0) {
|
|
vec.resize(n);
|
|
memcpy(vec.data(), buffer, n*sizeof(double));
|
|
}
|
|
return n;
|
|
}
|
|
|
|
|
|
|
|
// read text field
|
|
bool mjXUtil::ReadAttrTxt(XMLElement* elem, const char* attr, string& text, bool required) {
|
|
const char* pstr = elem->Attribute(attr);
|
|
|
|
// check if attribute exists
|
|
if (!pstr) {
|
|
if (required) {
|
|
throw mjXError(elem, "required attribute missing: '%s'", attr);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// read text
|
|
text = string(pstr);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
// read single int
|
|
bool mjXUtil::ReadAttrInt(XMLElement* elem, const char* attr, int* data, bool required) {
|
|
const char* pstr = elem->Attribute(attr);
|
|
|
|
// check if attribute exists
|
|
if (!pstr) {
|
|
if (required) {
|
|
throw mjXError(elem, "required attribute missing: '%s'", attr);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// convert to int, check
|
|
int buffer[2] = {0, 0};
|
|
if (sscanf(pstr, "%d", buffer) != 1) {
|
|
throw mjXError(elem, "single int expected in attribute %s", attr);
|
|
}
|
|
|
|
// copy data
|
|
*data = buffer[0];
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
// read vector<float> from string
|
|
void mjXUtil::String2Vector(const string& txt, vector<float>& vec) {
|
|
stringstream strm(txt);
|
|
vec.clear();
|
|
|
|
while (!strm.eof()) {
|
|
float num;
|
|
strm >> num;
|
|
if (strm.fail()) {
|
|
break;
|
|
} else {
|
|
vec.push_back(num);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// read vector<int> from string
|
|
void mjXUtil::String2Vector(const string& txt, vector<int>& vec) {
|
|
stringstream strm(txt);
|
|
vec.clear();
|
|
|
|
while (!strm.eof()) {
|
|
int num;
|
|
strm >> num;
|
|
if (strm.fail()) {
|
|
break;
|
|
} else {
|
|
vec.push_back(num);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// write vector<float> to string
|
|
void mjXUtil::Vector2String(string& txt, const vector<float>& vec) {
|
|
stringstream strm;
|
|
|
|
for (size_t i=0; i<vec.size(); i++) {
|
|
if (i>0) {
|
|
strm << " ";
|
|
}
|
|
strm << vec[i];
|
|
}
|
|
|
|
txt = strm.str();
|
|
}
|
|
|
|
|
|
|
|
// write vector<int> to string
|
|
void mjXUtil::Vector2String(string& txt, const vector<int>& vec) {
|
|
stringstream strm;
|
|
|
|
for (size_t i=0; i<vec.size(); i++) {
|
|
if (i>0) {
|
|
strm << " ";
|
|
}
|
|
strm << vec[i];
|
|
}
|
|
|
|
txt = strm.str();
|
|
}
|
|
|
|
|
|
|
|
// find subelement with given name, make sure it is unique
|
|
XMLElement* mjXUtil::FindSubElem(XMLElement* elem, string name, bool required) {
|
|
XMLElement* subelem = 0;
|
|
|
|
XMLElement* iter = elem->FirstChildElement();
|
|
while (iter) {
|
|
// identify elements with given name
|
|
if (name == iter->Value()) {
|
|
// make sure name is not repeated
|
|
if (subelem) {
|
|
throw mjXError(subelem, "repeated element: '%s'", name.c_str());
|
|
}
|
|
|
|
// save found element
|
|
subelem = iter;
|
|
}
|
|
|
|
// advance to next element
|
|
iter = iter->NextSiblingElement();
|
|
}
|
|
|
|
if (required && !subelem) {
|
|
throw mjXError(elem, "missing element: '%s'", name.c_str());
|
|
}
|
|
|
|
return subelem;
|
|
}
|
|
|
|
|
|
|
|
// find attribute, translate key, return int value
|
|
bool mjXUtil::MapValue(XMLElement* elem, const char* attr, int* data,
|
|
const mjMap* map, int mapSz, bool required) {
|
|
// get attribute text
|
|
string text;
|
|
if (!ReadAttrTxt(elem, attr, text, required)) {
|
|
return false;
|
|
}
|
|
|
|
// find keyword in map
|
|
int value = FindKey(map, mapSz, text);
|
|
if (value<0) {
|
|
throw mjXError(elem, "invalid keyword: '%s'", text.c_str());
|
|
}
|
|
|
|
// copy
|
|
*data = value;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
//---------------------------------- write functions -----------------------------------------------
|
|
|
|
// check if double is int
|
|
static bool isint(double x) {
|
|
return ((std::abs(x - floor(x)) < 1E-12) || (std::abs(x - ceil(x)) < 1E-12));
|
|
}
|
|
|
|
|
|
// round to nearest int
|
|
static int Round(double x) {
|
|
if (std::abs(x - floor(x)) < std::abs(x - ceil(x))) {
|
|
return (int)floor(x);
|
|
} else {
|
|
return (int)ceil(x);
|
|
}
|
|
}
|
|
|
|
|
|
// write attribute
|
|
template<typename T>
|
|
void mjXUtil::WriteAttr(XMLElement* elem, string name, int n, T* data, const T* def) {
|
|
// make sure all are defined
|
|
if constexpr (std::is_floating_point_v<T>) {
|
|
for (int i=0; i<n; i++) {
|
|
if (std::isnan(data[i])) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// skip default attributes
|
|
if (SameVector(data, def, n)) {
|
|
return;
|
|
}
|
|
|
|
// increase precision for testing
|
|
stringstream stream;
|
|
stream.precision(mujoco::_mjPRIVATE__get_xml_precision());
|
|
|
|
// process all numbers
|
|
for (int i=0; i<n; i++) {
|
|
// add space between numbers
|
|
if (i>0) {
|
|
stream << " ";
|
|
}
|
|
|
|
// append number
|
|
if (isint(data[i])) {
|
|
stream << Round(data[i]);
|
|
} else {
|
|
stream << data[i];
|
|
}
|
|
}
|
|
|
|
// set attribute as string
|
|
WriteAttrTxt(elem, name, stream.str());
|
|
}
|
|
|
|
|
|
template void mjXUtil::WriteAttr(XMLElement* elem, string name, int n,
|
|
double* data, const double* def);
|
|
|
|
template void mjXUtil::WriteAttr(XMLElement* elem, string name, int n,
|
|
float* data, const float* def);
|
|
|
|
template void mjXUtil::WriteAttr(XMLElement* elem, string name, int n,
|
|
int* data, const int* def);
|
|
|
|
template void mjXUtil::WriteAttr(XMLElement* elem, string name, int n,
|
|
mjtByte* data, const mjtByte* def);
|
|
|
|
|
|
// write vector<double> attribute, default = zero array
|
|
void mjXUtil::WriteVector(XMLElement* elem, string name, vector<double>& vec) {
|
|
// proceed only if non-zero found
|
|
bool ok = false;
|
|
for (size_t i=0; i<vec.size(); i++) {
|
|
if (vec[i]) {
|
|
ok = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok) {
|
|
return;
|
|
}
|
|
|
|
// write
|
|
WriteAttr(elem, name, vec.size(), vec.data());
|
|
}
|
|
|
|
|
|
// write vector<double> attribute, default with same size
|
|
void mjXUtil::WriteVector(XMLElement* elem, string name, vector<double>& vec,
|
|
vector<double>& def) {
|
|
// proceed only if non-zero found
|
|
bool ok = false;
|
|
for (size_t i=0; i<vec.size(); i++) {
|
|
if (vec[i]!=def[i]) {
|
|
ok = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!ok) {
|
|
return;
|
|
}
|
|
|
|
// write
|
|
WriteAttr(elem, name, vec.size(), vec.data());
|
|
}
|
|
|
|
|
|
// write attribute- string
|
|
void mjXUtil::WriteAttrTxt(XMLElement* elem, string name, string value) {
|
|
// skip if value is empty
|
|
if (value.empty()) {
|
|
return;
|
|
}
|
|
|
|
// set attribute
|
|
elem->SetAttribute(name.c_str(), value.c_str());
|
|
}
|
|
|
|
|
|
|
|
// write attribute- single int
|
|
void mjXUtil::WriteAttrInt(XMLElement* elem, string name, int data, int def) {
|
|
// skip default
|
|
if (data==def) {
|
|
return;
|
|
}
|
|
|
|
elem->SetAttribute(name.c_str(), data);
|
|
}
|
|
|
|
|
|
|
|
// write attribute- keyword
|
|
void mjXUtil::WriteAttrKey(XMLElement* elem, string name,
|
|
const mjMap* map, int mapsz, int data, int def) {
|
|
// skip default
|
|
if (data==def) {
|
|
return;
|
|
}
|
|
|
|
WriteAttrTxt(elem, name, FindValue(map, mapsz, data));
|
|
}
|