RE: [Dev-C++] Reading GCC output

[Brian C. B. <bcb...@ya...>]

Hi,
Thank you for this code, it appears to work correctly with GCC.

Sincerely,
Brian

"Shall we accept good from God, and not trouble?"  Job 2:10
-----Original Message-----
From: dev...@li...
[mailto:dev...@li...]On Behalf Of Elias
Pschernig
Sent: Monday, June 18, 2001 5:17 PM
To: dev...@li...
Subject: Re: [Dev-C++] Reading GCC output


>   I apologize for not being clear. I am coding a small IDE that invokes
the GCC compiler, just
> like Dev-C++ does. Dev-C++ catches the output produced by GCC and displays
the errors,
> warnings, and other GCC output at the bottom of the program. I would like
to know how to do
> just that: invoke GCC from my program, catch the output, and display it. I
know how to invoke
> GCC and display any output, but I do not know how to catch the output.
Could someone point me
> in the right direction? Thanks in advance.

Hi, i don't know why the source code you posted doesn't work. I'm using
basically the same code in my programs. The program below works fine for me
under win98, i'm using the code to catch output for another program, but it
seems to work with 'gcc' just the same.

I didn't look at your code in detail, but it's almost the same procedure:

Cerate a temporary file, redirect the output from the called command into
that file, then read the contents of the temporary file and delete the file.

I compiled with 'gcc -mwindows -O3 -s -o catch.exe catch.c', but should of
course work with a dev-c++ project as well.

(Warning: This code may contain all sort of mistakes and bugs)(but i hope it
does work)

Elias Pschernig

-- catch.c
#include <windows.h>

void execute(char *command) {
   char tempdir[1024];
   char tempfile[1024];
   STARTUPINFO sui;
   PROCESS_INFORMATION pi;
   HANDLE capture;

   GetTempPath(1024, tempdir);
   GetTempFileName(tempdir, "bla", 0, tempfile);

   capture=CreateFile(tempfile,GENERIC_READ|GENERIC_WRITE,0,NULL,
      CREATE_ALWAYS,FILE_ATTRIBUTE_TEMPORARY,NULL);

   memset(&sui,0,sizeof sui);

   sui.cb = sizeof sui;
   sui.lpTitle = "my redir";
   sui.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
   sui.hStdOutput = capture;
   sui.hStdError = capture;
   sui.hStdInput = NULL;
   sui.wShowWindow = SW_HIDE;

   if(CreateProcess(NULL, command,
      NULL, NULL, TRUE, 0, NULL, tempdir, &sui, &pi)) {

      char *buffer;
      DWORD size;

      WaitForSingleObject(pi.hProcess, INFINITE);

      SetFilePointer(capture, 0, NULL, FILE_BEGIN);
      size = GetFileSize(capture, NULL);
      buffer = alloca(size+1);

      ReadFile(capture, buffer, size, &size, NULL);
      buffer[size] = 0;

      CloseHandle(capture);

      CloseHandle(pi.hThread);
      CloseHandle(pi.hProcess);

      DeleteFile(tempfile);

      MessageBox(NULL,buffer,"Captured Output",MB_OK);

   } else {
      MessageBox(NULL,command,"Error: Could not execute",MB_OK);
   }

}

int WINAPI WinMain(HINSTANCE hinst,HINSTANCE prev,LPSTR arg,int show) {
   execute("gcc -v");
   return 0;
}


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