I have added all lua source files in xcode, then build successfully, but have error when run.
after load the lua file, it comes out the error when use pcall method.
Here is the code:
p_lua_stack_ = luaL_newstate();
luaL_openlibs(p_lua_stack_);
FilePathManager *m = [FilePathManager sharedInstance];
int r = luaL_loadfile(p_lua_stack_, [[m llkFacadeFilePath] UTF8String]);
DLog(#"%#", [m llkFacadeFilePath]);
DPRINT("%d", r);
//DPRINT("%d", lua_pcall(p_lua_stack_, 0, 0, 0));
int cr = lua_pcall(p_lua_stack_, 0, 0, 0);
LuaStateUtil *util = LuaStateUtil::GetSharedInstancePointer();
util->PrintPcallReturnValue(cr); //print return value info
DPRINT("%s", lua_tostring(p_lua_stack_, -1)); //when run to this line, the output is...
The output is:...4-489C-4A40-8582-F734FAAC428D/LLK.app/llk_facade.lua:1: attempt to call global 'module' (a nil value)
Then I am totally confused because "module" is a library method of Lua.
Who can help me, please?
maybe this question read a little hard, i'm not good at English.
If that is Lua 5.2, you need to enable module by defining LUA_COMPAT_MODULE.
Related
I'm trying to use a callback function with the led controller of esp32, however I'm unable to compile the code. I'm not sure if something is missing or the code has errors, as I have a limited understanding of pointers or coding in general.
I'm using the Arduino framework, however when I hover over the ledc_cb_register text, VSCode will popup some more details/definition of this function, so I would expect that it does see the reference to it.
relevant esp32 documentation:
docs.espressif.com
I'm trying to copy the following example, but make it a bit simpler (using only one channel):
github
It seems this example can be compiled on my side too, but this uses espidf framework.
trying the following code (many lines are not shown here for simplicity)
static bool cb_ledc_fade_end_event(const ledc_cb_param_t *param, void *user_arg)
{
portBASE_TYPE taskAwoken = pdFALSE;
if (param->event == LEDC_FADE_END_EVT) {
isFading = false;
}
return (taskAwoken == pdTRUE);
}
[...]
void setup() {
ledc_timer_config_t ledc_timer = {
.speed_mode = LEDC_HIGH_SPEED_MODE, // timer mode
.duty_resolution = LEDC_TIMER_13_BIT, // resolution of PWM duty
.timer_num = LEDC_TIMER_0, // timer index
.freq_hz = LED_frequency, // frequency of PWM signal
.clk_cfg = LEDC_AUTO_CLK, // Auto select the source clock
};
ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));
ledc_channel_config_t ledc_channel = {
.gpio_num = LED_PIN,
.speed_mode = LEDC_HIGH_SPEED_MODE,
.channel = LEDC_CHANNEL_0,
.timer_sel = LEDC_TIMER_0,
.duty = 4000,
.hpoint = 0,
//.flags.output_invert = 0
};
ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
ledc_fade_func_install(0);
ledc_cbs_t callbacks = {
.fade_cb = cb_ledc_fade_end_event
};
ledc_cb_register(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, &callbacks, 0);
and getting the following error message:
[..]/.platformio/packages/toolchain-xtensa-esp32#8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\src\main.cpp.o:(.literal._Z5setupv+0x78): undefined reference to 'ledc_cb_register(ledc_mode_t, ledc_channel_t, ledc_cbs_t*, void*)'
[..]/.platformio/packages/toolchain-xtensa-esp32#8.4.0+2021r2-patch3/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: .pio\build\esp32dev\src\main.cpp.o: in function 'setup()':
[..]\PlatformIO\Projects\asdf/src/main.cpp:272: undefined reference to 'ledc_cb_register(ledc_mode_t, ledc_channel_t, ledc_cbs_t*, void*)'
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\esp32dev\firmware.elf] Error 1
According to the docs, it seems to be a feature that was added in v4.4.4
but the latest Arduino core (2.0.6) is build on v4.4.3.
If you are not on the latest Arduino core, try updating that first and see if it works. If not, then you just have to wait until the Arduino core is updated to use ESP IDF v4.4.4.
Of course, you can use ledc_isr_register(...) to register an ISR handler for the interrupt.
Best of luck!
Update:
I realized that the problem (at least on my side when testing it) was that there is an error in the ledc.h file, where they forgot to add ledc_cb_register in an extern "C" block.
I manually patched it by moving the
#ifdef __cplusplus
}
#endif
part, which was located after the ledc_set_fade_step_and_start function, below ledc_cb_register instead.
So, the end of my ledc.h file looks like this now:
...
esp_err_t ledc_set_fade_step_and_start(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t scale, uint32_t cycle_num, ledc_fade_mode_t fade_mode);
/**
* #brief LEDC callback registration function
* ...
*/
esp_err_t ledc_cb_register(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_cbs_t *cbs, void *user_arg);
#ifdef __cplusplus
}
#endif
all.I want to call a js function to show something in my plugin.This is my code
NPObject* npwindow = NULL;
NPError ret = browser->getvalue(mInstanceForJS, NPNVWindowNPObject, &npwindow);
if (ret != NPERR_NO_ERROR)
return ;
// Get window object.
NPVariant windowVar;
NPIdentifier winID = browser->getstringidentifier("window");
bool bRet = browser->getproperty(mInstanceForJS, npwindow, winID, &windowVar);
if (!bRet)
{
browser->releaseobject(npwindow);
return ;
}
NPObject* window = NPVARIANT_TO_OBJECT(windowVar);
NPVariant voidResponse;
NPVariant elementId;
STRINGZ_TO_NPVARIANT([info UTF8String], elementId);
NPVariant args[] = {elementId};
NPIdentifier funcID= browser->getstringidentifier([funName UTF8String]);
bRet = browser->invoke(mInstanceForJS, window, funcID, args, 1, &voidResponse);
browser->releasevariantvalue(&windowVar);
when called bRet = browser->invoke(mInstanceForJS, window, funcID, args, 1, &voidResponse);,Safari can not responsed.Is there any errors?
npwindow is already the window object; you're effectively querying for "window.window". Granted, I don't know why this wouldn't work, but it seems a little weird.
That's problem #1.
Problem #2 is that you're using STRINGZ_TO_NPVARIANT to store the result of UTF8String. STRINGZ_TO_NPVARIANT doesn't copy the memory, so you could be in trouble if the function wanted to hang onto that string, since the string returned by that will be freed when your autorelease pool cycles. Of course, that could also be a memory leak. Either way, the correct way to pass a string to the browser is to allocate memory for it using NPN_MemAlloc and then copy the string in. Then pass that pointer to the browser. See http://npapi.com/memory for more info.
Problem #3 is that you haven't given us any idea of when you are running this code; it's quite possible that you are trying to run this code too early in the plugin or page lifecycle and thus it may not work because of that.
Then there is another question: What do you mean by "Safari can no responsed"? Forgetting the grammatical error, I'm not sure what you mean by this. Does it hang? is bRet false? Does your computer suddenly get encased in ice, thus halting all processing? If the above is not helpful, please answer these questions and I'll try again.
I'm trying to check if the .save method is execute but I'm getting "Cannot convert from void to boolean" error. How could I check it? Also the img.save() doesn't work in a web applet, any clue why it doesn't work?
PImage img = get (180, 0, 620, 400);
if( img.save("img/111,jpg") )
{
fill(0, 255, 0);
}
else
{
fill(255, 0, 0);
}
Your if statement is assuming true or false will be returned by img.save() function. Therefore you need to check what the img.save() is returning. If that is a method than it cannot return any value back once it has been executed meaning you cannot compare it...
Put the method call in try/catch if you expect that the method could fail...
One thing at a time:
You set fill, but don't draw anything afterwards(at least in the code posted) *
By default some functionalities might not work without signing the applet.
You can't use PImage's save() method to do an upload for you. Here's a quote from the documentation:
It is not possible to use save() while running the program in a web
browser.
You will need to use a serverside script to pass data to which in turn will save the image to the serser. Have a look at Philho's upload sketch. Notice that he is passing data to a php script which handles writing the file on the server.
*although not as important, you can try this in the Processing IDE/locally to see the colour change:
if( img.save("img/111.jpg") )
{
fill(0, 255, 0);
}
else
{
fill(255, 0, 0);
}
rect(0,0,width,height);
I'm writing a program using the C language with gtk+ and gtksourceview-2.0.
I'm using a GtkFileChooser for the user to choose a file and when he clicks on it, i want the content to be loaded to the GtkSourceView' TextBuffer
this is the function that gets executed when a user double click's a file on the GtkFileChooser:
void on_file_activated(GtkWidget *widget, gpointer data) {
GFile *file;
FILE *fp;
gchar *path_name;
long file_size;
gchararray file_buffer;
file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(widget));
path_name=g_file_get_path(file);
g_debug("%s is chosen\n", path_name);
fp=fopen(path_name, "r");
g_assert( fp != NULL);
fseek(fp, 0L, SEEK_END);
file_size = ftell(fp);
rewind(fp);
g_debug("file size: %ld\n",file_size*sizeof(gchar));
file_buffer=calloc(file_size, sizeof(gchar));
g_assert(file_buffer != NULL);
fread(&file_buffer,file_size,1,fp);
g_debug("after fread");
//file_buffer[file_size*sizeof(gchar)]=0;
//g_debug("after adding zero: %s",file_buffer);
gtk_text_buffer_set_text (textbuffer, file_buffer,2);
g_debug("after set text");
g_object_unref(file);
}
this is the output of my application:
** (tour_de_gtk:18107): DEBUG: /home/ufk/Projects/gtk-projects/tour-de-gtk/Debug/src/examples/example_gtk_label/main.c is chosen
** (tour_de_gtk:18107): DEBUG: file size: 16
** (tour_de_gtk:18107): DEBUG: after fread
after then i get a segmentation fault on the command gtk_text_buffer_set_text
as you can see i have two commands that are commented out. trying to g_debug the buffer which obviously creates a segmentation fault because i didn't add a zero to the end of the string, and even when I try to add zero to the end of the string i get a segmentation fault. I probably did something wrong.
here i'm trying to write only the first two characters of the buffer but with no luck.
any ideas?
update
the finished function:
void on_file_activated(GtkWidget *widget, gpointer data) {
GFile *file;
gchar *path_name;
long file_size;
gchar *file_buffer;
GError *error;
gboolean read_file_status;
file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(widget));
path_name=g_file_get_path(file);
g_debug("%s is chosen\n", path_name);
read_file_status=g_file_get_contents (path_name,&file_buffer,NULL, &error);
if (read_file_status == FALSE) {
g_error("error opening file: %s\n",error && error->message ? error->message : "No Detail");
return;
}
gtk_text_buffer_set_text (textbuffer, file_buffer,-1);
g_debug("after set text");
g_object_unref(file);
}
There are a lot of improvements possible here, you may already know many and just be messing around, but I'll list several in case.
gchararray file_buffer;
Just use char*
g_assert( fp != NULL);
Should use assert for programming errors, not runtime errors, so here g_printerr() or a dialog would be better
fseek(fp, 0L, SEEK_END);
file_size = ftell(fp);
rewind(fp);
fstat(fileno(fp), &statbuf) is probably a better way to do this, but the whole approach is kind of bad; rather than get the size, it's better to just read into a dynamically-growing buffer. Or if you're willing to preallocate the whole buffer, just use g_file_get_contents(). Another approach is g_file_query_info() (which is more portable and uses the vfs)
file_buffer=calloc(file_size, sizeof(gchar));
g_new0(char, file_size) is nicer, or g_malloc0(file_size). Also you need file_size+1 to make room for the nul byte.
fread(&file_buffer,file_size,1,fp);
Here you want file_buffer (a char*) rather than &file_buffer (a char**). This is probably the actual cause of the immediate breakage.
You also need to check the return value of fread().
Also missing here is g_utf8_validate() on the data read in.
Have a look at the implementation of g_file_get_contents() to see one approach here. You could also use g_file_load_contents to use a GFile instead of a path (portable, uses vfs) or better yet in a real-world app, g_file_load_contents_async().
To debug segfaults, the two best tools are:
run in gdb, wait for crash, then type "bt"; be sure to use -g with your compiler when you compile
run in valgrind, see where it says you look at bad memory
I'm trying to write a very simple program to replace an existing executable. It should munge its arguments slightly and exec the original program with the new arguments. It's supposed to be invoked automatically and silently by a third-party library.
It runs fine, but it pops up a console window to show the output of the invoked program. I need that console window to not be there. I do not care about the program's output.
My original attempt was set up as a console application, so I thought I could fix this by writing a new Windows GUI app that did the same thing. But it still pops up the console. I assume that the original command is marked as a console application, and so Windows automatically gives it a console window to run in. I also tried replacing my original call to _exec() with a call to system(), just in case. No help.
Does anyone know how I can make this console window go away?
Here's my code:
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
char* lpCmdLine,
int nCmdShow)
{
char *argString, *executable;
// argString and executable are retrieved here
std::vector< std::string > newArgs;
// newArgs gets set up with the intended arguments here
char const ** newArgsP = new char const*[newArgs.size() + 1];
for (unsigned int i = 0; i < newArgs.size(); ++i)
{
newArgsP[i] = newArgs[i].c_str();
}
newArgsP[newArgs.size()] = NULL;
int rv = _execv(executable, newArgsP);
if (rv)
{
return -1;
}
}
Use the CreateProcess function instead of execve. For the dwCreationFlags paramter pass the CREATE_NO_WINDOW flag. You will also need to pass the command line as a string as well.
e.g.
STARTUPINFO startInfo = {0};
PROCESS_INFORMATION procInfo;
TCHAR cmdline[] = _T("\"path\\to\\app.exe\" \"arg1\" \"arg2\"");
startInfo.cb = sizeof(startInfo);
if(CreateProcess(_T("path\\to\\app.exe"), cmdline, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &startInfo, &procInfo))
{
CloseHandle(procInfo.hProcess);
CloseHandle(procInfo.hThread);
}
Aha, I think I found the answer on MSDN, at least if I'm prepared to use .NET. (I don't think I'm really supposed to, but I'll ignore that for now.)
System::String^ command = gcnew System::String(executable);
System::Diagnostics::Process^ myProcess = gcnew Process;
myProcess->StartInfor->FileName = command;
myProcess->StartInfo->UseShellExecute = false; //1
myProcess->StartInfo->CreateNowindow = true; //2
myProcess->Start();
It's those two lines marked //1 and //2 that are important. Both need to be present.
I really don't understand what's going on here, but it seems to work.
You need to create a non-console application (i.e. a Windows GUI app). If all this app does is some processing of files or whatever, you won't need to have a WinMain, register any windows or have a message loop - just write your code as for a console app. Of course, you won't be able to use printf et al. And when you come to execute it, use the exec() family of functions, not system().