Experimental Physics and
Industrial Control System

Does anyone have a script or program that will take a set of C function declarations and generate the C code to register those functions with the iocsh?

I have 18 functions to register, some with 4 or 5 arguments.

Susanna

#!/usr/bin/perl
#
# makeRegistrar 
#
# Takes [ansi vanilla] function prototypes and produces EPICS registrar 
# function.
#

# output is to be inserted into code containing functions to be registered.
# Note the registrar function and its export call both use the program name 
# "xxx", which you need to change by hand.  

#
# be sure to include "iocsh.h" and "epicsExport.h" in the file.
#

# Example prototypes from autoSaveRestore:
#  
#    Clip these and use as test input if desired.  Remove the ^#
#
#int set_savefile_name(char *filename, char *save_filename);
#int create_periodic_set(char *filename, int period, char *macrostring);
#int create_triggered_set(char *filename, char *trigger_channel,
#        char *macrostring);
#int create_monitor_set(char *filename, int period, char *macrostring);
#int create_manual_set(char *filename, char *macrostring);
#int fdbrestore(char *filename);
#void fdblist(int verbose);
#
#int set_requestfile_path(char *path, char *pathsub);
#int set_savefile_path(char *path, char *pathsub);
#int set_saveTask_priority(int priority);
#int remove_data_set(char *filename);
#int reload_periodic_set(char *filename, int period, char *macrostring);
#int reload_triggered_set(char *filename, char *trigger_channel,
#        char *macrostring);
#int reload_monitor_set(char * filename, int period, char *macrostring);
#int reload_manual_set(char * filename, char *macrostring);
#int fdbrestoreX(char *filename);
#


#
# input
#
$i = 0;
while (<>) {
#  chomp();
   @inlist[$i] = $_;
   $i++;
}

#
# combine broken lines
#
$i = 0;$untermed=0;
foreach (@inlist) {
   if (!/;$/) {
      chomp;
      @outlist[$i] = $_;
      $untermed = 1;
   }
   else {
      if ($untermed == 1) {
         $untermed = 0; 
         @outlist[$i] = join("",@outlist[$i],$_);   
      }  else {
         @outlist[$i] = $_;
      }
      $i++;
   }
}
#print @outlist;

#get args 

$i = 0;
foreach (@outlist) {
   ($junk, $arglist) = split("[(]",$_);
   ($arglist, $junk) = split("[)]",$arglist);
   @allargs[$i] = $arglist . "\n";
   $i++;
}

#
# produce argument descriptors, arg lists, funcdefs, callfuncs
#

   $i = 0;
   $funcfound = 0;
   foreach (@allargs) {
      #
      # note that is block of code is repeated below, to catch last
      # member of list.  
      #
      if ($funcfound == 1) {
         $funcfound = 0;
         print "static const iocshArg * const ".$funcname."Args\[" . $j ."\] = {\n";
         for ($k = 0; $k < $j; $k++) {
            print "       &" . $funcname . "Arg" . $k;
            if (($k + 1) < $j) {
                print ",\n"; 
            } else { print "\};\n"}
         }
         print "static const iocshFuncDef " . $funcname . "FuncDef = {";
         print "\"". $funcname ."\"," . $j . "\," . $funcname."Args};\n";
         print "static void " . $funcname . "CallFunc\(const iocshArgBuf *args)\n";
         print "{\n";
         print "    " . $funcname . "\(";
         for ($k = 0; $k < $j; $k++) {
            print "args\[" . $k . "\]\.";
            if (@types[$k] eq "iocshArgInt") {
               print "ival"; }
            if (@types[$k] eq "iocshArgString") {
               print "sval"; }
            if (@types[$k] eq "iocshArgDouble") {
               print "dval"; }
            if (($k + 1) < $j) {
                print ","; 
            } else { print "\);\n"}
         }
         print "}\n";
      }
      ($type, $funcname) = split(/\s+/,@outlist[$i]);
      ($funcname, $junk) = split(/\(/,$funcname);
      $i++;
      @names = "";
      @types = "";
      $j = 0;
      @args = split;
      $typefound = 0;
      $charfound = 0;
      foreach (@args) {
         if ($charfound == 2) {
            $charfound = 0;
            @types[$j] = "iocshArgString";
            if (/,$/) { chop($_); }
            @names[$j] = $_;
            $funcfound = 1;
            print "static const iocshArg " . $funcname . "Arg" . $j . " = { ";
            print "\"". @names[$j] . "\",". @types[$j] . " };\n";
            $j++;
            next;
         }
         if ($charfound == 1 && /\*/ && length($_) == 1) { 
            $charfound = 2;
            next;
         }
         if ($charfound == 1 && /\*/ ) { 
            s/\*//;
            $charfound = 0;
            @types[$j] = "iocshArgString";
            if (/,$/) { chop($_); }
            @names[$j] = $_;
            $funcfound = 1;
            print "static const iocshArg " . $funcname . "Arg" . $j . " = { ";
            print "\"". @names[$j] . "\",". @types[$j] . " };\n";
            $j++;
            next;
         }
         if ($charfound == 1) {
            $charfound = 0;
            @types[$j] = "iocshArgInt";
            if (/,$/) { chop($_); }
            @names[$j] = $_;
            $funcfound = 1;
            print "static const iocshArg " . $funcname . "Arg" . $j . " = { ";
            print "\"". @names[$j] . "\",". @types[$j] . " };\n";
            $j++;
            next;
         }
         if (/char/) {
            $charfound = 1;
            next;
         }
         if (/unsigned/) {
            $unsfound = 1;
            next;
         }
         if ($intfound == 1) {
            $intfound = 0;
            @types[$j] = "iocshArgInt";
            if (/,$/) { chop($_); }
            @names[$j] = $_;
            $funcfound = 1;
            print "static const iocshArg " . $funcname . "Arg" . $j . " = { ";
            print "\"". @names[$j] . "\",". @types[$j] . " };\n";
            $j++;
            next;
         }
         if ($unsfound == 1 || /char|int|long|short/) {
            $unsfound = 0;
            $intfound = 1;
            next;
         }
         if ($doublefound ==1) {
            $doublefound = 0;
            @types[$j] = "iocshArgDouble";
            if (/,$/) { chop($_); }
            @names[$j] = $_;
            $funcfound = 1;
            print "static const iocshArg " . $funcname . "Arg" . $j . " = { ";
            print "\"". @names[$j] . "\",". @types[$j] . " };\n";
            $j++;
            next;
         }
         if (/double|float/) {
            $doublefound = 1;
            next;
         }
      }
   }
#
# this needs to be done one more time for the last function...
#

      if ($funcfound == 1) {
         $funcfound = 0;
         print "static const iocshArg * const ".$funcname."Args\[" . $j ."\] = {\n";
         for ($k = 0; $k < $j; $k++) {
            print "       &" . $funcname . "Arg" . $k;
            if (($k + 1) < $j) {
                print ",\n"; 
            } else { print "\};\n"}
         }
         print "static const iocshFuncDef " . $funcname . "FuncDef = {";
         print "\"". $funcname ."\"," . $j . "\," . $funcname."Args};\n";
         print "static void " . $funcname . "CallFunc\(const iocshArgBuf *args)\n";
         print "{\n";
         print "    " . $funcname . "\(";
         for ($k = 0; $k < $j; $k++) {
            print "args\[" . $k . "\]\.";
            if (@types[$k] eq "iocshArgInt") {
               print "ival"; }
            if (@types[$k] eq "iocshArgString") {
               print "sval"; }
            if (@types[$k] eq "iocshArgDouble") {
               print "dval"; }
            if (($k + 1) < $j) {
                print ","; 
            } else { print ");\n"}
         }
         print "}\n";
      }
#
#  end of last function work

#
# produce registrar function
#
print "\n";
print "void xxxRegister(void)\n";
print "{\n";


foreach (@outlist) {
      ($type, $funcname) = split(/\s+/,$_);
      ($funcname, $junk) = split(/\(/,$funcname);

   print "   iocshRegister(&" . $funcname . "FuncDef, " . $funcname . "CallFunc)\;\n";
}

print "}\n";

print "epicsExportRegistrar(xxxRegister)\;\n";

Replies:

Re: Automatically generate iocsh registrar code? Benjamin Franksen

References:

Automatically generate iocsh registrar code? Susanna Jacobson

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