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#include <stdlib.h>
#include <string.h>
#include <node_api.h>
#include "../common.h"
static const char theText[] =
"Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
static int deleterCallCount = 0;
static void deleteTheText(napi_env env, void* data, void* finalize_hint) {
NAPI_ASSERT_RETURN_VOID(env, data != NULL && strcmp(data, theText) == 0, "invalid data");
(void)finalize_hint;
free(data);
deleterCallCount++;
}
static void noopDeleter(napi_env env, void* data, void* finalize_hint) {
NAPI_ASSERT_RETURN_VOID(env, data != NULL && strcmp(data, theText) == 0, "invalid data");
(void)finalize_hint;
deleterCallCount++;
}
napi_value newBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
char* theCopy;
const unsigned int kBufferSize = sizeof(theText);
NAPI_CALL(env,
napi_create_buffer(
env,
sizeof(theText),
(void**)(&theCopy),
&theBuffer));
NAPI_ASSERT(env, theCopy, "Failed to copy static text for newBuffer");
memcpy(theCopy, theText, kBufferSize);
return theBuffer;
}
napi_value newExternalBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
char* theCopy = strdup(theText);
NAPI_ASSERT(env, theCopy, "Failed to copy static text for newExternalBuffer");
NAPI_CALL(env,
napi_create_external_buffer(
env,
sizeof(theText),
theCopy,
deleteTheText,
NULL, // finalize_hint
&theBuffer));
return theBuffer;
}
napi_value getDeleterCallCount(napi_env env, napi_callback_info info) {
napi_value callCount;
NAPI_CALL(env, napi_create_number(env, deleterCallCount, &callCount));
return callCount;
}
napi_value copyBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
NAPI_CALL(env, napi_create_buffer_copy(
env, sizeof(theText), theText, NULL, &theBuffer));
return theBuffer;
}
napi_value bufferHasInstance(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
NAPI_ASSERT(env, argc == 1, "Wrong number of arguments");
napi_value theBuffer = args[0];
bool hasInstance;
napi_valuetype theType;
NAPI_CALL(env, napi_typeof(env, theBuffer, &theType));
NAPI_ASSERT(env,
theType == napi_object,
"bufferHasInstance: instance is not an object");
NAPI_CALL(env, napi_is_buffer(env, theBuffer, &hasInstance));
NAPI_ASSERT(env, hasInstance, "bufferHasInstance: instance is not a buffer");
napi_value returnValue;
NAPI_CALL(env, napi_get_boolean(env, hasInstance, &returnValue));
return returnValue;
}
napi_value bufferInfo(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
NAPI_ASSERT(env, argc == 1, "Wrong number of arguments");
napi_value theBuffer = args[0];
char *bufferData;
napi_value returnValue;
size_t bufferLength;
NAPI_CALL(env,
napi_get_buffer_info(
env,
theBuffer,
(void**)(&bufferData),
&bufferLength));
NAPI_CALL(env, napi_get_boolean(env,
!strcmp(bufferData, theText) && bufferLength == sizeof(theText),
&returnValue));
return returnValue;
}
napi_value staticBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
NAPI_CALL(
env,
napi_create_external_buffer(env,
sizeof(theText),
(void*)theText,
noopDeleter,
NULL, // finalize_hint
&theBuffer));
return theBuffer;
}
void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
napi_value theValue;
NAPI_CALL_RETURN_VOID(env,
napi_create_string_utf8(env, theText, sizeof(theText), &theValue));
NAPI_CALL_RETURN_VOID(env,
napi_set_named_property(env, exports, "theText", theValue));
napi_property_descriptor methods[] = {
DECLARE_NAPI_PROPERTY("newBuffer", newBuffer),
DECLARE_NAPI_PROPERTY("newExternalBuffer", newExternalBuffer),
DECLARE_NAPI_PROPERTY("getDeleterCallCount", getDeleterCallCount),
DECLARE_NAPI_PROPERTY("copyBuffer", copyBuffer),
DECLARE_NAPI_PROPERTY("bufferHasInstance", bufferHasInstance),
DECLARE_NAPI_PROPERTY("bufferInfo", bufferInfo),
DECLARE_NAPI_PROPERTY("staticBuffer", staticBuffer),
};
NAPI_CALL_RETURN_VOID(env, napi_define_properties(
env, exports, sizeof(methods) / sizeof(methods[0]), methods));
}
NAPI_MODULE(addon, Init)
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