| 1194 | #define cjson_min(a, b) (((a) < (b)) ? (a) : (b)) |
| 1195 | |
| 1196 | static unsigned char *print(const cJSON * const item, cJSON_bool format, const internal_hooks * const hooks) |
| 1197 | { |
| 1198 | static const size_t default_buffer_size = 256; |
| 1199 | printbuffer buffer[1]; |
| 1200 | unsigned char *printed = NULL; |
| 1201 | |
| 1202 | memset(buffer, 0, sizeof(buffer)); |
| 1203 | |
| 1204 | /* create buffer */ |
| 1205 | buffer->buffer = (unsigned char*) hooks->allocate(default_buffer_size); |
| 1206 | buffer->length = default_buffer_size; |
| 1207 | buffer->format = format; |
| 1208 | buffer->hooks = *hooks; |
| 1209 | if (buffer->buffer == NULL) |
| 1210 | { |
| 1211 | goto fail; |
| 1212 | } |
| 1213 | |
| 1214 | /* print the value */ |
| 1215 | if (!print_value(item, buffer)) |
| 1216 | { |
| 1217 | goto fail; |
| 1218 | } |
| 1219 | update_offset(buffer); |
| 1220 | |
| 1221 | /* check if reallocate is available */ |
| 1222 | if (hooks->reallocate != NULL) |
| 1223 | { |
| 1224 | printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1); |
| 1225 | if (printed == NULL) { |
| 1226 | goto fail; |
| 1227 | } |
| 1228 | buffer->buffer = NULL; |
| 1229 | } |
| 1230 | else /* otherwise copy the JSON over to a new buffer */ |
| 1231 | { |
| 1232 | printed = (unsigned char*) hooks->allocate(buffer->offset + 1); |
| 1233 | if (printed == NULL) |
| 1234 | { |
| 1235 | goto fail; |
| 1236 | } |
| 1237 | memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1)); |
| 1238 | printed[buffer->offset] = '\0'; /* just to be sure */ |
| 1239 | |
| 1240 | /* free the buffer */ |
| 1241 | hooks->deallocate(buffer->buffer); |
| 1242 | buffer->buffer = NULL; |
| 1243 | } |
| 1244 | |
| 1245 | return printed; |
| 1246 | |
| 1247 | fail: |
| 1248 | if (buffer->buffer != NULL) |
| 1249 | { |
| 1250 | hooks->deallocate(buffer->buffer); |
| 1251 | buffer->buffer = NULL; |
| 1252 | } |
| 1253 | |