Marius Renn | 65953da | 2012-03-27 10:44:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <stddef.h> |
| 18 | #include <stdlib.h> |
| 19 | |
| 20 | #include "value.h" |
| 21 | |
| 22 | #define NULL_VALUE_TYPE 0 |
| 23 | #define INT_VALUE_TYPE 1 |
| 24 | #define FLOAT_VALUE_TYPE 2 |
| 25 | #define STRING_VALUE_TYPE 3 |
| 26 | #define BUFFER_VALUE_TYPE 4 |
| 27 | #define MUTABLE_BUFFER_VALUE_TYPE 5 |
| 28 | #define INT_ARRAY_VALUE_TYPE 6 |
| 29 | #define FLOAT_ARRAY_VALUE_TYPE 7 |
| 30 | |
| 31 | // Templated versions ////////////////////////////////////////////////////////////////////////////// |
| 32 | template<typename POD, int TYPEID> |
| 33 | POD GetPODValue(Value value) { |
| 34 | return value.type == TYPEID ? *reinterpret_cast<POD*>(value.value) : POD(); |
| 35 | } |
| 36 | |
| 37 | template<typename PTR, int TYPEID> |
| 38 | PTR GetPtrValue(Value value) { |
| 39 | return value.type == TYPEID ? reinterpret_cast<PTR>(value.value) : NULL; |
| 40 | } |
| 41 | |
| 42 | template<typename POD, int TYPEID> |
| 43 | Value MakePODValue(POD value) { |
| 44 | Value result; |
| 45 | result.type = TYPEID; |
| 46 | result.value = malloc(sizeof(POD)); |
| 47 | result.count = 1; |
| 48 | *reinterpret_cast<POD*>(result.value) = value; |
| 49 | return result; |
| 50 | } |
| 51 | |
| 52 | template<typename BASE, int TYPEID> |
| 53 | Value MakePtrValue(const BASE* values, int count) { |
| 54 | Value result; |
| 55 | result.type = TYPEID; |
| 56 | result.value = malloc(sizeof(BASE) * count); |
| 57 | memcpy(result.value, values, sizeof(BASE) * count); |
| 58 | result.count = count; |
| 59 | return result; |
| 60 | } |
| 61 | |
| 62 | template<typename POD, int TYPEID> |
| 63 | int SetPODValue(Value* value, POD new_value) { |
| 64 | if (value->type == NULL_VALUE_TYPE) { |
| 65 | value->type = TYPEID; |
| 66 | value->value = malloc(sizeof(POD)); |
| 67 | value->count = 1; |
| 68 | } |
| 69 | if (value->type == TYPEID) { |
| 70 | *reinterpret_cast<POD*>(value->value) = new_value; |
| 71 | return 1; |
| 72 | } |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | template<typename BASE, int TYPEID> |
| 77 | int SetPtrValue(Value* value, const BASE* new_values, int count) { |
| 78 | if (value->type == NULL_VALUE_TYPE) { |
| 79 | value->type = TYPEID; |
| 80 | value->value = malloc(sizeof(BASE) * count); |
| 81 | value->count = count; |
| 82 | } |
| 83 | if (value->type == TYPEID && value->count == count) { |
| 84 | memcpy(value->value, new_values, sizeof(BASE) * count); |
| 85 | return 1; |
| 86 | } |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | // C Wrappers ////////////////////////////////////////////////////////////////////////////////////// |
| 91 | int GetIntValue(Value value) { |
| 92 | return GetPODValue<int, INT_VALUE_TYPE>(value); |
| 93 | } |
| 94 | |
| 95 | float GetFloatValue(Value value) { |
| 96 | return GetPODValue<float, FLOAT_VALUE_TYPE>(value); |
| 97 | } |
| 98 | |
| 99 | const char* GetStringValue(Value value) { |
| 100 | return GetPtrValue<const char*, STRING_VALUE_TYPE>(value); |
| 101 | } |
| 102 | |
| 103 | const char* GetBufferValue(Value value) { |
| 104 | return (value.type == BUFFER_VALUE_TYPE || value.type == MUTABLE_BUFFER_VALUE_TYPE) |
| 105 | ? (const char*)value.value |
| 106 | : NULL; |
| 107 | } |
| 108 | |
| 109 | char* GetMutableBufferValue(Value value) { |
| 110 | return GetPtrValue<char*, MUTABLE_BUFFER_VALUE_TYPE>(value); |
| 111 | } |
| 112 | |
| 113 | int* GetIntArrayValue(Value value) { |
| 114 | return GetPtrValue<int*, INT_ARRAY_VALUE_TYPE>(value); |
| 115 | } |
| 116 | |
| 117 | float* GetFloatArrayValue(Value value) { |
| 118 | return GetPtrValue<float*, FLOAT_ARRAY_VALUE_TYPE>(value); |
| 119 | } |
| 120 | |
| 121 | int ValueIsNull(Value value) { |
| 122 | return value.type == NULL_VALUE_TYPE; |
| 123 | } |
| 124 | |
| 125 | int ValueIsInt(Value value) { |
| 126 | return value.type == INT_VALUE_TYPE; |
| 127 | } |
| 128 | |
| 129 | int ValueIsFloat(Value value) { |
| 130 | return value.type == FLOAT_VALUE_TYPE; |
| 131 | } |
| 132 | |
| 133 | int ValueIsString(Value value) { |
| 134 | return value.type == STRING_VALUE_TYPE; |
| 135 | } |
| 136 | |
| 137 | int ValueIsBuffer(Value value) { |
| 138 | return value.type == BUFFER_VALUE_TYPE || value.type == MUTABLE_BUFFER_VALUE_TYPE; |
| 139 | } |
| 140 | |
| 141 | int ValueIsIntArray(Value value) { |
| 142 | return value.type == INT_ARRAY_VALUE_TYPE; |
| 143 | } |
| 144 | |
| 145 | int ValueIsFloatArray(Value value) { |
| 146 | return value.type == FLOAT_ARRAY_VALUE_TYPE; |
| 147 | } |
| 148 | |
| 149 | Value MakeNullValue() { |
| 150 | Value result; |
| 151 | result.type = NULL_VALUE_TYPE; |
| 152 | result.value = NULL; |
| 153 | result.count = 0; |
| 154 | return result; |
| 155 | } |
| 156 | |
| 157 | Value MakeIntValue(int value) { |
| 158 | return MakePODValue<int, INT_VALUE_TYPE>(value); |
| 159 | } |
| 160 | |
| 161 | Value MakeFloatValue(float value) { |
| 162 | return MakePODValue<float, FLOAT_VALUE_TYPE>(value); |
| 163 | } |
| 164 | |
| 165 | Value MakeStringValue(const char* value) { |
| 166 | return MakePtrValue<char, STRING_VALUE_TYPE>(value, strlen(value) + 1); |
| 167 | } |
| 168 | |
| 169 | Value MakeBufferValue(const char* buffer, int size) { |
| 170 | return MakePtrValue<char, BUFFER_VALUE_TYPE>(buffer, size); |
| 171 | } |
| 172 | |
| 173 | Value MakeBufferValueNoCopy(const char* buffer, int size) { |
| 174 | Value result; |
| 175 | result.type = BUFFER_VALUE_TYPE; |
| 176 | result.value = (void*)buffer; |
| 177 | result.count = size; |
| 178 | return result; |
| 179 | } |
| 180 | |
| 181 | Value MakeMutableBufferValue(const char* buffer, int size) { |
| 182 | return MakePtrValue<const char, MUTABLE_BUFFER_VALUE_TYPE>(buffer, size); |
| 183 | } |
| 184 | |
| 185 | Value MakeMutableBufferValueNoCopy(char* buffer, int size) { |
| 186 | Value result; |
| 187 | result.type = MUTABLE_BUFFER_VALUE_TYPE; |
| 188 | result.value = (void*)buffer; |
| 189 | result.count = size; |
| 190 | return result; |
| 191 | } |
| 192 | |
| 193 | Value MakeIntArrayValue(const int* values, int count) { |
| 194 | return MakePtrValue<int, INT_ARRAY_VALUE_TYPE>(values, count); |
| 195 | } |
| 196 | |
| 197 | Value MakeFloatArrayValue(const float* values, int count) { |
| 198 | return MakePtrValue<float, FLOAT_ARRAY_VALUE_TYPE>(values, count); |
| 199 | } |
| 200 | |
| 201 | int SetIntValue(Value* value, int new_value) { |
| 202 | return SetPODValue<int, INT_VALUE_TYPE>(value, new_value); |
| 203 | } |
| 204 | |
| 205 | int SetFloatValue(Value* value, float new_value) { |
| 206 | return SetPODValue<float, FLOAT_VALUE_TYPE>(value, new_value); |
| 207 | } |
| 208 | |
| 209 | int SetStringValue(Value* value, const char* new_value) { |
| 210 | return SetPtrValue<char, STRING_VALUE_TYPE>(value, new_value, strlen(new_value) + 1); |
| 211 | } |
| 212 | |
| 213 | int SetMutableBufferValue(Value* value, const char* new_data, int size) { |
| 214 | return SetPtrValue<char, MUTABLE_BUFFER_VALUE_TYPE>(value, new_data, size); |
| 215 | } |
| 216 | |
| 217 | int SetIntArrayValue(Value* value, const int* new_values, int count) { |
| 218 | return SetPtrValue<int, INT_ARRAY_VALUE_TYPE>(value, new_values, count); |
| 219 | } |
| 220 | |
| 221 | int SetFloatArrayValue(Value* value, const float* new_values, int count) { |
| 222 | return SetPtrValue<float, FLOAT_ARRAY_VALUE_TYPE>(value, new_values, count); |
| 223 | } |
| 224 | |
| 225 | int GetValueCount(Value value) { |
| 226 | return value.count; |
| 227 | } |
| 228 | |
| 229 | void ReleaseValue(Value* value) { |
| 230 | if (value && value->value) { |
| 231 | free(value->value); |
| 232 | value->value = NULL; |
| 233 | value->type = NULL_VALUE_TYPE; |
| 234 | } |
| 235 | } |
| 236 | |