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<?php
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
namespace Google\Protobuf\Internal;
class GPBJsonWire
{
public static function serializeFieldToStream(
$value,
$field,
&$output, $has_field_name = true)
{
if ($has_field_name) {
$output->writeRaw("\"", 1);
$field_name = GPBJsonWire::formatFieldName($field);
$output->writeRaw($field_name, strlen($field_name));
$output->writeRaw("\":", 2);
}
return static::serializeFieldValueToStream(
$value,
$field,
$output,
!$has_field_name);
}
public static function serializeFieldValueToStream(
$values,
$field,
&$output,
$is_well_known = false)
{
if ($field->isMap()) {
$output->writeRaw("{", 1);
$first = true;
$map_entry = $field->getMessageType();
$key_field = $map_entry->getFieldByNumber(1);
$value_field = $map_entry->getFieldByNumber(2);
switch ($key_field->getType()) {
case GPBType::STRING:
case GPBType::SFIXED64:
case GPBType::INT64:
case GPBType::SINT64:
case GPBType::FIXED64:
case GPBType::UINT64:
$additional_quote = false;
break;
default:
$additional_quote = true;
}
foreach ($values as $key => $value) {
if ($first) {
$first = false;
} else {
$output->writeRaw(",", 1);
}
if ($additional_quote) {
$output->writeRaw("\"", 1);
}
if (!static::serializeSingularFieldValueToStream(
$key,
$key_field,
$output,
$is_well_known)) {
return false;
}
if ($additional_quote) {
$output->writeRaw("\"", 1);
}
$output->writeRaw(":", 1);
if (!static::serializeSingularFieldValueToStream(
$value,
$value_field,
$output,
$is_well_known)) {
return false;
}
}
$output->writeRaw("}", 1);
return true;
} elseif ($field->isRepeated()) {
$output->writeRaw("[", 1);
$first = true;
foreach ($values as $value) {
if ($first) {
$first = false;
} else {
$output->writeRaw(",", 1);
}
if (!static::serializeSingularFieldValueToStream(
$value,
$field,
$output,
$is_well_known)) {
return false;
}
}
$output->writeRaw("]", 1);
return true;
} else {
return static::serializeSingularFieldValueToStream(
$values,
$field,
$output,
$is_well_known);
}
}
private static function serializeSingularFieldValueToStream(
$value,
$field,
&$output, $is_well_known = false)
{
switch ($field->getType()) {
case GPBType::SFIXED32:
case GPBType::SINT32:
case GPBType::INT32:
$str_value = strval($value);
$output->writeRaw($str_value, strlen($str_value));
break;
case GPBType::FIXED32:
case GPBType::UINT32:
if ($value < 0) {
$value = bcadd($value, "4294967296");
}
$str_value = strval($value);
$output->writeRaw($str_value, strlen($str_value));
break;
case GPBType::FIXED64:
case GPBType::UINT64:
if ($value < 0) {
$value = bcadd($value, "18446744073709551616");
}
// Intentional fall through.
case GPBType::SFIXED64:
case GPBType::INT64:
case GPBType::SINT64:
$output->writeRaw("\"", 1);
$str_value = strval($value);
$output->writeRaw($str_value, strlen($str_value));
$output->writeRaw("\"", 1);
break;
case GPBType::FLOAT:
if (is_nan($value)) {
$str_value = "\"NaN\"";
} elseif ($value === INF) {
$str_value = "\"Infinity\"";
} elseif ($value === -INF) {
$str_value = "\"-Infinity\"";
} else {
$str_value = sprintf("%.8g", $value);
}
$output->writeRaw($str_value, strlen($str_value));
break;
case GPBType::DOUBLE:
if (is_nan($value)) {
$str_value = "\"NaN\"";
} elseif ($value === INF) {
$str_value = "\"Infinity\"";
} elseif ($value === -INF) {
$str_value = "\"-Infinity\"";
} else {
$str_value = sprintf("%.17g", $value);
}
$output->writeRaw($str_value, strlen($str_value));
break;
case GPBType::ENUM:
$enum_desc = $field->getEnumType();
if ($enum_desc->getClass() === "Google\Protobuf\NullValue") {
$output->writeRaw("null", 4);
break;
}
$enum_value_desc = $enum_desc->getValueByNumber($value);
if (!is_null($enum_value_desc)) {
$str_value = $enum_value_desc->getName();
$output->writeRaw("\"", 1);
$output->writeRaw($str_value, strlen($str_value));
$output->writeRaw("\"", 1);
} else {
$str_value = strval($value);
$output->writeRaw($str_value, strlen($str_value));
}
break;
case GPBType::BOOL:
if ($value) {
$output->writeRaw("true", 4);
} else {
$output->writeRaw("false", 5);
}
break;
case GPBType::BYTES:
$bytes_value = base64_encode($value);
$output->writeRaw("\"", 1);
$output->writeRaw($bytes_value, strlen($bytes_value));
$output->writeRaw("\"", 1);
break;
case GPBType::STRING:
$value = json_encode($value, JSON_UNESCAPED_UNICODE);
$output->writeRaw($value, strlen($value));
break;
// case GPBType::GROUP:
// echo "GROUP\xA";
// trigger_error("Not implemented.", E_ERROR);
// break;
case GPBType::MESSAGE:
$value->serializeToJsonStream($output);
break;
default:
user_error("Unsupported type.");
return false;
}
return true;
}
private static function formatFieldName($field)
{
return $field->getJsonName();
}
// Used for escaping control chars in strings.
private static $k_control_char_limit = 0x20;
private static function jsonNiceEscape($c)
{
switch ($c) {
case '"': return "\\\"";
case '\\': return "\\\\";
case '/': return "\\/";
case '\b': return "\\b";
case '\f': return "\\f";
case '\n': return "\\n";
case '\r': return "\\r";
case '\t': return "\\t";
default: return NULL;
}
}
private static function isJsonEscaped($c)
{
// See RFC 4627.
return $c < chr($k_control_char_limit) || $c === "\"" || $c === "\\";
}
public static function escapedJson($value)
{
$escaped_value = "";
$unescaped_run = "";
for ($i = 0; $i < strlen($value); $i++) {
$c = $value[$i];
// Handle escaping.
if (static::isJsonEscaped($c)) {
// Use a "nice" escape, like \n, if one exists for this
// character.
$escape = static::jsonNiceEscape($c);
if (is_null($escape)) {
$escape = "\\u00" . bin2hex($c);
}
if ($unescaped_run !== "") {
$escaped_value .= $unescaped_run;
$unescaped_run = "";
}
$escaped_value .= $escape;
} else {
if ($unescaped_run === "") {
$unescaped_run .= $c;
}
}
}
$escaped_value .= $unescaped_run;
return $escaped_value;
}
}
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