Module: R2rb

Defined in:
lib/R4rb/init.rb,
lib/R4rb/R2rb_eval.rb,
lib/R4rb/R2rb_init.rb,
lib/R4rb/converter.rb,
ext/R4rb/R4rb.c,
ext/R4rb/R4rb.4.1.c

Overview

Attention “…n…” have to be replaced by “…\n…” example : ‘cat(“toton”)’ fails but not ‘cat(“toto\n”)’ more surprisingly, this fails even in comment ‘# cat(“toton”)’

Defined Under Namespace

Classes: RBuffer, RConsole, RVector, Server

Constant Summary collapse

@@out = 
[]
@@pair = 
["<<",">>"]

Class Method Summary collapse

Class Method Details

.<(rcode) ⇒ Object Also known as: output

@@out.rb2R=R2rb



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# File 'lib/R4rb/R2rb_eval.rb', line 80

def R2rb.<(rcode)
  @@out.replace [] ##@@out=[] #important! it could otherwise remove
  @@out.rb2R=self
  @@out < rcode.to_s ##@@out.inR2rb rcode.to_s
  return (@@out.length<=1 ? @@out[0] : @@out) 
end

.<<(s) ⇒ Object 



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# File 'lib/R4rb/R2rb_eval.rb', line 22

def R2rb.<<(s)
  R2rb.eval(s)
end

.alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/R4rb/init.rb', line 11

def R2rb.alive?
  defined? @@initR
end

.eval(s, aff = nil) ⇒ Object 



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# File 'lib/R4rb/R2rb_eval.rb', line 5

def R2rb.eval(s,aff=nil)
  s=["{\n"+s+"}\n"]
  evalLines s,aff
end

.evalLines(cmd, print) ⇒ Object

*************** EVAL *********************



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# File 'ext/R4rb/R4rb.c', line 73

VALUE R2rb_eval(VALUE obj, VALUE cmd, VALUE print)
{
  char *cmdString;
  int nbCmds;
  VALUE tmp;
  int errorOccurred,status, i;

  SEXP text, expr, ans=R_NilValue /* -Wall */;


  //printf("Avant parsing\n");

  nbCmds=RARRAY_LEN(cmd);

  //printf("nbCmds : %d\n",nbCmds);

  text = PROTECT(allocVector(STRSXP, nbCmds));
  for (i = 0 ; i < nbCmds ; i++) {
    tmp=rb_ary_entry(cmd,i);
    cmdString=StringValuePtr(tmp);
    SET_STRING_ELT(text, i, mkChar(cmdString));
  }
  expr = PROTECT(RR_ParseVector(text, -1, &status));

  if (status != PARSE_OK) {
    //printf("Parsing error (status=%d) in:\n",status);
    for (i = 0 ; i < nbCmds ; i++) {
      tmp=rb_ary_entry(cmd,i);
      cmdString=StringValuePtr(tmp);
      //printf("%s\n",cmdString);
    }
    UNPROTECT(2);
    return Qfalse;
  }
  
  /* Note that expr becomes an EXPRSXP and hence we need the loop
     below (a straight eval(expr, R_GlobalEnv) won't work) */
  {
    for(i = 0 ; i < nbCmds ; i++)
      ans = R_tryEval(VECTOR_ELT(expr, i),NULL, &errorOccurred);
      if(errorOccurred) {
        //fprintf(stderr, "Caught another error calling sqrt()\n");
        fflush(stderr);
        UNPROTECT(2);
        return Qfalse;
      }

      if (print != Qnil) {
        Rf_PrintValue(ans);
      }
  }

  UNPROTECT(2);
  return Qtrue;
}

.init(args = ["--save","--slave","--quiet"]) ⇒ Object 



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# File 'lib/R4rb/init.rb', line 7

def R2rb.init(args=["--save","--slave","--quiet"])
  @@initR=R2rb.initR(args) unless R2rb.alive?
end

.initR(args) ⇒ Object 



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# File 'ext/R4rb/R4rb.c', line 50

VALUE R2rb_init(VALUE obj, VALUE args)
{
  char **argv;//={"REmbed","--save","--slave","--quiet"};
  int i,argc;//=sizeof(argv)/sizeof(argv[0]);
  VALUE tmp;

  argc=RARRAY_LEN(args) + 1;
  //printf("argc=%d\n",argc);
  argv=malloc(sizeof(char*)*argc);
  argv[0]="REmbed";
  for (i = 1 ; i < argc ; i++) {
    tmp=rb_ary_entry(args,i-1);
    argv[i]=StringValuePtr(tmp);
    //printf("argv[%d]=%s\n",i,argv[i]);
  }
  //printf("argc=%d\n",argc);
  Rf_initEmbeddedR(argc,argv);
  R_Interactive = FALSE;
  return Qtrue;
}

.multilang_parser(str) ⇒ Object 



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# File 'lib/R4rb/converter.rb', line 33

def R2rb.multilang_parser(str)
#p @@pair
  lang="r|R|rb|Rb"
  s=str
  if @@pair[0].empty?
    mask = /((?:#{lang}).*)/
  else
    mask = /#{Regexp.escape(@@pair[0])}((?:#{lang})[^#{Regexp.escape(@@pair[0])}]*)#{Regexp.escape(@@pair[1])}/
  end
  str=str.split(mask,-1)
  return s if str.length<=1
  vals=[]
  res=[]
  inds=0..(str.length / 2 - 1)
  ".tmp<-NULL".to_R 
  inds.each {|i|
    res << str[2*i]
    if str[2*i+1] =~ /^(?:r|R):(.*)/
      (".tmp<-cbind(.tmp,"+$1+")").to_R
    end
    if str[2*i+1] =~ /^(?:rb|Rb):(.*)/
      a=eval($1)
      a=[a] unless a.is_a? Array
      a > :tmp
      (".tmp<-cbind(.tmp,tmp)").to_R
   end
  }
  res << str[-1]
#p res
  cmd="apply(.tmp,1,function(e) paste("
  inds.each{|i| cmd += "'"+res[i]+"',e["+i.to_s+"+1]," }
  cmd += "'"+res[-1]+"',sep=''))"
#"print(.tmp)".to_R
#p cmd
  cmd.to_R
end

.pair ⇒ Object 



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# File 'lib/R4rb/converter.rb', line 16

def R2rb.pair
  @@pair
end

.pair=(pair) ⇒ Object 



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# File 'lib/R4rb/converter.rb', line 20

def R2rb.pair=(pair)
  if pair.is_a? String
    pairs={"{"=>"}","("=>")","<"=>">","["=>"]"}
    pair2=pair.reverse.gsub(/[#{Regexp.escape(pairs.keys.join)}]/) {|e| Regexp.escape(pairs[e])}
    pair=[pair,pair2]
  end
#p "ICI";p pair
  if (pair.is_a? Array) and pair.length==2
    @@pair=pair
  end
#p @@pair
end

.parse(s, aff = nil) ⇒ Object 



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# File 'lib/R4rb/R2rb_eval.rb', line 10

def R2rb.parse(s,aff=nil)
  s=["{\n"+s+"}\n"]
  parseLines s,aff
end

.parseLines(cmd, print) ⇒ Object

*************** PARSE *********************



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# File 'ext/R4rb/R4rb.c', line 131

VALUE R2rb_parse(VALUE obj, VALUE cmd,VALUE print)
{
  char *cmdString;
  int nbCmds;
  VALUE tmp;
  int status,i;

  SEXP text, expr, ans=R_NilValue /* -Wall */;


  //printf("Avant parsing\n");

  nbCmds=RARRAY_LEN(cmd);

  //printf("nbCmds : %d\n",nbCmds);

  text = PROTECT(allocVector(STRSXP, nbCmds));
  for (i = 0 ; i < nbCmds ; i++) {
    tmp=rb_ary_entry(cmd,i);
    cmdString=StringValuePtr(tmp);
    SET_STRING_ELT(text, i, mkChar(cmdString));
  }
  expr = PROTECT(RR_ParseVector(text, -1, &status));

  if (status != PARSE_OK) {
    if (print != Qnil) printf("Parsing error (status=%d) in:\n",status);
    for (i = 0 ; i < nbCmds ; i++) {
      tmp=rb_ary_entry(cmd,i);
      cmdString=StringValuePtr(tmp);
      if (print != Qnil) printf("%s\n",cmdString);
    }
    //UNPROTECT(2);
    //return Qfalse;
  }
  UNPROTECT(2);
  //return Qtrue;
  return INT2FIX(status);
}

.try_eval(code) ⇒ Object 



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# File 'lib/R4rb/R2rb_eval.rb', line 15

def R2rb.try_eval(code)
  try_code=".result_try_code<-try({\n"+code+"\n},silent=TRUE)\n.result_try_code"
  R2rb << try_code
  puts ".result_try_code".to_R if "inherits(.result_try_code,'try-error')".to_R
end