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5f923cd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | // Copyright 2025 The ODML Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "runtime/components/tool_use/fc_tool_format_utils.h"
#include <sstream>
#include <string>
#include "absl/status/status.h" // from @com_google_absl
#include "absl/status/statusor.h" // from @com_google_absl
#include "absl/strings/ascii.h" // from @com_google_absl
#include "absl/strings/string_view.h" // from @com_google_absl
#include "nlohmann/json.hpp" // from @nlohmann_json
#include "runtime/util/status_macros.h"
namespace litert::lm {
namespace {
absl::StatusOr<std::string> FormatObjectAsFc(
const nlohmann::ordered_json& object, absl::string_view escape_tag) {
if (!object.is_object()) {
return absl::InvalidArgumentError(
std::string("Object must be a JSON object. Got: ") +
object.type_name());
}
std::stringstream ss;
ss << "{";
int count = 0;
for (const auto& [key, value] : object.items()) {
ASSIGN_OR_RETURN(std::string value_str, FormatValueAsFc(value, escape_tag));
ss << key << ":" << value_str;
count += 1;
if (count < object.size()) {
ss << ",";
}
}
ss << "}";
return ss.str();
}
absl::StatusOr<std::string> FormatArrayAsFc(const nlohmann::ordered_json& array,
absl::string_view escape_tag) {
if (!array.is_array()) {
return absl::InvalidArgumentError(
std::string("Array must be a JSON array. Got ") + array.type_name());
}
std::stringstream ss;
ss << "[";
int count = 0;
for (const auto& element : array) {
ASSIGN_OR_RETURN(std::string element_str,
FormatValueAsFc(element, escape_tag));
ss << element_str;
count += 1;
if (count < array.size()) {
ss << ",";
}
}
ss << "]";
return ss.str();
}
nlohmann::ordered_json UppercaseTypes(const nlohmann::ordered_json& object) {
nlohmann::ordered_json new_object = object;
if (new_object.is_object()) {
for (auto it = new_object.begin(); it != new_object.end(); ++it) {
if (it.key() == "type" && it.value().is_string()) {
std::string type_str = it.value().get<std::string>();
if (type_str == "string" || type_str == "number" ||
type_str == "integer" || type_str == "object" ||
type_str == "array" || type_str == "boolean" ||
type_str == "null") {
it.value() = absl::AsciiStrToUpper(type_str);
}
}
// Recursively apply to nested objects and arrays.
if (it.value().is_object() || it.value().is_array()) {
it.value() = UppercaseTypes(it.value());
}
}
} else if (new_object.is_array()) {
for (auto& element : new_object) {
// Recursively apply to elements that are objects or arrays.
if (element.is_object() || element.is_array()) {
element = UppercaseTypes(element);
}
}
}
return new_object;
}
} // namespace
absl::StatusOr<std::string> FormatValueAsFc(const nlohmann::ordered_json& value,
absl::string_view escape_tag) {
std::stringstream ss;
if (value.is_null()) {
ss << "null";
} else if (value.is_string()) {
ss << escape_tag << value.get<std::string>() << escape_tag;
} else if (value.is_number()) {
ss << value.dump();
} else if (value.is_boolean()) {
ss << value.dump();
} else if (value.is_object()) {
ASSIGN_OR_RETURN(std::string object_str,
FormatObjectAsFc(value, escape_tag));
ss << object_str;
} else if (value.is_array()) {
ASSIGN_OR_RETURN(std::string array_str, FormatArrayAsFc(value, escape_tag));
ss << array_str;
} else {
return absl::InvalidArgumentError(
std::string(
"Value is not a supported type. Supported types are null, string, "
"number, boolean, object, array. Got: ") +
value.type_name());
}
return ss.str();
}
absl::StatusOr<std::string> FormatToolAsFc(const nlohmann::ordered_json& tool,
absl::string_view escape_tag) {
if (!tool.is_object()) {
return absl::InvalidArgumentError(
std::string("Tool must be a JSON object. Got: ") + tool.type_name());
}
const nlohmann::ordered_json& function =
tool.contains("function") ? tool["function"] : tool;
if (!function.contains("name") || !function["name"].is_string()) {
return absl::InvalidArgumentError(
"Tool name is required and must be a string.");
}
nlohmann::ordered_json fields = UppercaseTypes(function);
fields.erase("name");
std::stringstream ss;
ASSIGN_OR_RETURN(std::string fields_str,
FormatObjectAsFc(fields, escape_tag));
ss << "declaration:" << function["name"].get<std::string>() << fields_str;
return ss.str();
}
} // namespace litert::lm
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