Created
March 9, 2019 15:13
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get_buffer()
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| #include <assert.h> | |
| #include <limits.h> | |
| #include <node_api.h> | |
| #include <stdint.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| static int arg_buf( | |
| napi_env env, | |
| napi_value value, | |
| unsigned char** buffer, | |
| int* length | |
| ) { | |
| assert(*buffer == NULL); | |
| assert(*length == 0); | |
| bool is_buffer; | |
| assert(napi_is_buffer(env, value, &is_buffer) == napi_ok); | |
| assert(is_buffer); | |
| size_t size = 0; | |
| assert(napi_get_buffer_info(env, value, (void**) buffer, &size) == napi_ok); | |
| assert(*buffer != NULL); | |
| assert(size <= INT_MAX); | |
| *length = (int) size; | |
| assert(*length >= 0); | |
| return 1; | |
| } | |
| static napi_value get_buffer(napi_env env, napi_callback_info info) { | |
| size_t argc = 1; | |
| napi_value argv[1]; | |
| assert(napi_get_cb_info(env, info, &argc, argv, NULL, NULL) == napi_ok); | |
| assert(argc == 1); | |
| unsigned char* buffer = NULL; | |
| int buffer_length = 0; | |
| assert(arg_buf(env, argv[0], &buffer, &buffer_length)); | |
| assert(buffer != NULL); | |
| printf("buffer_length=%i\n", buffer_length); | |
| return NULL; | |
| } | |
| static napi_value Init(napi_env env, napi_value exports) { | |
| napi_value fn_get_buffer; | |
| assert(napi_create_function(env, NULL, 0, get_buffer, NULL, &fn_get_buffer) == napi_ok); | |
| assert(napi_set_named_property(env, exports, "get_buffer", fn_get_buffer) == napi_ok); | |
| return exports; | |
| } | |
| NAPI_MODULE(NODE_GYP_MODULE_NAME, Init) |
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| { | |
| "targets": [ | |
| { | |
| "target_name": "binding", | |
| "sources": [ "binding.c" ] | |
| }, | |
| { | |
| "target_name": "copy", | |
| "type": "none", | |
| "dependencies": [ "binding" ], | |
| "copies": [ | |
| { | |
| 'destination': '<(module_root_dir)', | |
| 'files': ['<(module_root_dir)/build/Release/binding.node'] | |
| } | |
| ] | |
| } | |
| ] | |
| } |
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| var binding = require('./binding.node'); | |
| var crypto = require('crypto'); | |
| console.log('process.version=' + process.version); | |
| console.log('testing Buffer.alloc(0)...'); | |
| binding.get_buffer(Buffer.alloc(0)); | |
| console.log('testing cipher.update(Buffer.alloc(0))...'); | |
| var key = Buffer.alloc(32, 255); | |
| var iv = Buffer.alloc(16); | |
| var cipher = crypto.createCipheriv('aes-256-ctr', key, iv); | |
| binding.get_buffer(cipher.update(Buffer.alloc(0))); |
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| { | |
| "name": "get_buffer", | |
| "version": "1.0.0", | |
| "main": "index.js", | |
| "files": [ | |
| "binding.c", | |
| "index.js" | |
| ], | |
| "author": "Joran Dirk Greef", | |
| "license": "MIT", | |
| "scripts": { | |
| "postinstall": "node-gyp clean" | |
| }, | |
| "engines": { | |
| "node": ">=10.0.0" | |
| } | |
| } |
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