drv_preproc_ifr.cpp

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// drv_preproc_ifr.cpp,v 1.15 2003/11/04 05:21:30 dhinton Exp

/*

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*/

// Pass an IDL file through the C preprocessor

#include "drv_extern_ifr.h"
#include "be_global.h"
#include "be_extern.h"

#include "idl_bool.h"
#include "idl_defines.h"
#include "global_extern.h"
#include "fe_extern.h"
#include "utl_string.h"
#include "ace/Process_Manager.h"
#include "ace/SString.h"
#include "ace/Env_Value_T.h"
#include "ace/ARGV.h"
#include "ace/streams.h"
#include "ace/OS_NS_stdio.h"

ACE_RCSID (IFR_Service, 
           drv_preproc_ifr, 
           "drv_preproc_ifr.cpp,v 1.15 2003/11/04 05:21:30 dhinton Exp")

static long argcount = 0;
static long max_argcount = 128;
static const char *arglist[128];
static const char *output_arg_format = 0;
static long output_arg_index = 0;

// Push the new CPP location if we got a -Yp argument
void
DRV_cpp_new_location (const char *new_loc)
{
  arglist[0] = new_loc;
}

// Push an argument into the arglist
void
DRV_cpp_putarg (const char *str)
{
  if (argcount >= max_argcount) 
    {
      ACE_ERROR ((LM_ERROR,
                  "%s%s %d %s\n",
                  idl_global->prog_name (),
                  ACE_TEXT (": More than"),
                  max_argcount,
                  ACE_TEXT ("arguments to preprocessor")));

      ACE_OS::exit (99);
    }

  arglist[argcount++] = ACE::strnew (str);
}

// Expand the output argument with the given filename.
void
DRV_cpp_expand_output_arg (const char *filename)
{
  if (output_arg_format != 0)
    {
      delete [] ACE_const_cast (char *, arglist[output_arg_index]);
      arglist[output_arg_index] = 0; 

      char *output_arg = 0;
      ACE_NEW (output_arg,
               char [ACE_OS::strlen (output_arg_format)
                     + ACE_OS::strlen (filename)
                     + 1]);

      ACE_OS::sprintf (output_arg,
                       output_arg_format,
                       filename);

      arglist[output_arg_index] = output_arg;
    }
}

// Initialize the cpp argument list.
void
DRV_cpp_init (void)
{
  // @@ There are two "one time" memory leaks in this function.
  //    They will not blow off the program but should be fixed at some point.
  const char *cpp_loc; 
  const char *cpp_args;

  // See if TAO_IDL_PREPROCESSOR is defined.

  ACE_Env_Value<char*> preprocessor ("TAO_IDL_PREPROCESSOR", (char *) 0);

  // Set cpp_loc to the built in location, unless it has been overriden by
  // environment variables.

  if (preprocessor != 0)
    {
      cpp_loc = preprocessor;
    }
  else
    {
      // Check for the deprecated CPP_LOCATION environment variable
      ACE_Env_Value<char*> cpp_path ("CPP_LOCATION", (char *) 0);
      if (cpp_path != 0)
        {
          ACE_ERROR ((LM_ERROR,
                      ACE_TEXT ("Warning: The environment variable ")
                      ACE_TEXT ("CPP_LOCATION has been deprecated.\n")
                      ACE_TEXT ("         Please use TAO_IDL_PREPROCESSOR ")
                      ACE_TEXT ("instead.\n")));

          cpp_loc = cpp_path;
        }
      else
        {
          cpp_loc = idl_global->cpp_location ();
        }
    }

  DRV_cpp_putarg (cpp_loc);
  DRV_cpp_putarg ("-I.");

  // Added some customizable preprocessor options

  ACE_Env_Value<char*> args1 ("TAO_IDL_PREPROCESSOR_ARGS", (char *) 0);

  if (args1 != 0)
    {
      cpp_args = args1;
    }
  else
    {
      // Check for the deprecated TAO_IDL_DEFAULT_CPP_FLAGS environment variable
      ACE_Env_Value<char*> args2 ("TAO_IDL_DEFAULT_CPP_FLAGS", (char *) 0);
      if (args2 != 0)
        {
          ACE_ERROR ((LM_ERROR,
                      "%s%s%s%s%s",
                      ACE_TEXT ("Warning: The environment variable "),
                      ACE_TEXT ("TAO_IDL_DEFAULT_CPP_FLAGS has been "),
                      ACE_TEXT ("deprecated.\n"),
                      ACE_TEXT ("         Please use "),
                      ACE_TEXT ("TAO_IDL_PREPROCESSOR_ARGS instead.\n")));

          cpp_args = args2;
        }
      else
        {
          // If no cpp flag was defined by the user, we define some
          // platform specific flags here.
          char option[BUFSIZ];

#if defined (TAO_IDL_PREPROCESSOR_ARGS)
          cpp_args = TAO_IDL_PREPROCESSOR_ARGS;
#elif defined (ACE_CC_PREPROCESSOR_ARGS)
          cpp_args = ACE_CC_PREPROCESSOR_ARGS;
#else
          cpp_args = "-E";
#endif /* TAO_IDL_PREPROCESSOR_ARGS */

          // So we can find OMG IDL files, such as `orb.idl'.
          ACE_OS::strcpy (option, "-I");

#if defined (TAO_IDL_INCLUDE_DIR)
          // TAO_IDL_INCLUDE_DIR should be in quotes,
          // e.g. "/usr/local/include/tao"

          ACE_OS::strcat (option, TAO_IDL_INCLUDE_DIR);
#else
          const char* TAO_ROOT = ACE_OS::getenv ("TAO_ROOT");
          
          if (TAO_ROOT != 0)
            {
              ACE_OS::strcat (option, TAO_ROOT);
              ACE_OS::strcat (option, "/tao");
            }
          else
            {
              const char* ACE_ROOT = ACE_OS::getenv ("ACE_ROOT");

              if (ACE_ROOT != 0)
                {
                  ACE_OS::strcat (option, ACE_ROOT);
                  ACE_OS::strcat (option, "/TAO/tao");
                }
              else
                {
                  ACE_ERROR ((
                      LM_ERROR,
                      "%s%s%s%s",
                      ACE_TEXT ("Note: The environment variables "),
                      ACE_TEXT ("TAO_ROOT and ACE_ROOT are not defined.\n"),
                      ACE_TEXT ("      TAO_IDL may not be able to "),
                      ACE_TEXT ("locate orb.idl\n")
                    ));

                  ACE_OS::strcat (option, ".");
                }
            }
#endif  /* TAO_IDL_INCLUDE_DIR */

          DRV_cpp_putarg (option);
      }
  }

  // Add any flags in cpp_args to cpp's arglist.
  ACE_ARGV arglist (cpp_args);

  for (size_t arg_cnt = 0; arg_cnt < (size_t)arglist.argc (); ++arg_cnt)
    {
      // Check for an argument that specifies the preprocessor's output file.
      if (ACE_OS::strstr (arglist[arg_cnt], "%s") != 0 
          && output_arg_format == 0)
        {
          output_arg_format = ACE::strnew (arglist[arg_cnt]);
          output_arg_index = argcount;
          DRV_cpp_putarg (0);
        }
      else
        {
          DRV_cpp_putarg (arglist[arg_cnt]);
        }
    }
}

// Lines can be 1024 chars long.
#define LINEBUF_SIZE    1024
static  char    drv_line[LINEBUF_SIZE + 1];

// Get a line from stdin
static long
DRV_get_line (FILE *f)
{
    char *l = fgets (drv_line, 
                     LINEBUF_SIZE, 
                     f);
    size_t i = 0;

    if (l == NULL)
      {
        return I_FALSE;
      }

    if (*l == '\0' && feof (f))
      {
        return I_FALSE;
      }

    if (*l == '\0')
      {
        return I_TRUE;
      }

    i = strlen(l) - 1;

    if (l[i] == '\n')
      {
        l[i] = '\0';
      }

    return I_TRUE;
}

// Copy from stdin to a file
static void
DRV_copy_input (FILE *fin, 
                char *fn, 
                const char *orig_filename)
{
  FILE  *f = ACE_OS::fopen (fn, "w");

  if (f == NULL) 
    {
      ACE_ERROR ((LM_ERROR,
                  "%s%s%s%s",
                  idl_global->prog_name (),
                  ACE_TEXT (": cannot open temp file "),
                  fn,
                  ACE_TEXT (" for writing\n")));

      ACE_OS::exit (99);
    }

  if (fin == NULL) 
    {
      ACE_ERROR ((LM_ERROR,
                  "%s%s",
                  idl_global->prog_name (),
                  ACE_TEXT (": cannot open input file\n")));

      ACE_OS::exit (99);
    }

#if !defined (ACE_WIN32)
  fprintf (f, 
           "#line 1 \"%s\"\n", 
           orig_filename);
#else
  // Convert single \ into double \ otherwise MSVC++ pre-processor
  // gets awfully confused.
  char buf[2*MAXPATHLEN];
  char *d = buf;

  for (const char *s = orig_filename; *s != 0; ++s)
    {
      if (*s == '\\')
        {
          *d = '\\';
          d++;
        }

      *d = *s;
      d++;
    }

  *d = 0;
  ACE_OS::fprintf (f, 
                   "#line 1 \"%s\"\n", 
                   buf);
#endif /* ! ACE_WIN32 */

  while (DRV_get_line (fin))
    {
      // We really need to know whether this line is a "#include
      // ...". If so, we would like to separate the "file name" and
      // keep that in the idl_global. We need them to produce
      // "#include's in the stubs and skeletons.
      DRV_check_for_include (drv_line);

      // Print the line to the temp file.
      ACE_OS::fprintf (f, 
                       "%s\n", 
                       drv_line);
    }

  // Close the temp file.
  ACE_OS::fclose (f);
}

// Strip down a name to the last component, 
// i.e. everything after the last '/' or '\' character
static char *
DRV_stripped_name (char *fn)
{
    char        *n = fn;
    size_t      l;

    if (n == NULL)
      {
        return NULL;
      }

    l = strlen (n);
    int slash_found = 0;

    for (n += l - 1; n >= fn && !slash_found; n--)
      {
        slash_found = (*n == '/' || *n == '\\');
      }

    n += 1;