Esempio n. 1
0
  /*
   * When generating (no) code for init routine, also generate File*
   * and close() for file.
   */
  private static void genFileReaderInit(
      SIRFileReader fr,
      CType return_type,
      String function_name,
      int selfID,
      List /*String*/ cleanupCode,
      CodegenPrintWriter p) {

    int id = NodeEnumerator.getSIROperatorId(fr);
    String theType = "" + fr.getOutputType();
    // dispatch to special routine for bit type
    if (theType.equals("bit")) {
      p.print("FILE* " + fpName(fr) + ";");
      p.newLine();
      p.newLine();
    }

    startParameterlessFunction(CommonUtils.CTypeToStringA(return_type, true), function_name, p);

    if (theType.equals("bit")) {
      p.print(fpName(fr) + " = fopen(\"" + fr.getFileName() + "\", \"r\");");
      p.newLine();
      p.print("assert (" + fpName(fr) + ");");
      p.newLine();
    } else {
      p.print("__file_descr__" + id + " = FileReader_open(\"" + fr.getFileName() + "\");");
      p.newLine();
      p.print("assert (__file_descr__" + id + ");");
      p.newLine();
    }

    endFunction(p);

    String closeName = ClusterUtils.getWorkName(fr, selfID) + "__close";

    startParameterlessFunction("void", closeName, p);

    if (theType.equals("bit")) {
      p.println("fclose(" + fpName(fr) + ");");
    } else {
      p.println("FileReader_close(__file_descr__" + id + ");");
    }

    endFunction(p);

    cleanupCode.add(closeName + "();\n");
  }
Esempio n. 2
0
  /*
   * File reader code currently works by using fread.
   *
   * The File* is declared outside any function / method.
   *
   * This code follows the model in the library of stalling (not pushing)
   * at end of file (detected by fread returning 0).
   *
   */
  private static void genFileReaderWork(
      SIRFileReader filter, Tape outputTape, int selfID, CodegenPrintWriter p) {

    if (KjcOptions.asciifileio) {
      System.err.println("Error: -asciifileio not supported in cluster backend.");
      System.err.println("Exiting...");
      System.exit(1);
    }

    String theType = "" + filter.getOutputType();
    // dispatch to special routine for bit type
    if (theType.equals("bit")) {
      genFileReaderWorkBit(filter, outputTape, selfID, p);
      return;
    }

    // get source and destination ids of outgoing tape
    Tape out = RegisterStreams.getFilterOutStream(filter);
    int s = out.getSource();
    int d = out.getDest();

    // template code to generate, using symbolic free vars above.
    StringBuilder sb = new StringBuilder();
    sb.append("\n  int __index;\n");
    sb.append("  for (__index=0; __index < ____n; __index++) {\n");
    if (KjcOptions.compressed) {
      sb.append("    unsigned char __temp = 0;\n");
      sb.append("    FileReader_read(__file_descr__");
      sb.append(selfID);
      sb.append(", &__temp, 1);\n");
      sb.append("    PUSH(__temp);\n");
      sb.append("    unsigned int __frame_size = __temp;\n");

      sb.append("    FileReader_read(__file_descr__");
      sb.append(selfID);
      sb.append(", &__temp, 1);\n");
      sb.append("    PUSH(__temp);\n");
      sb.append("    __frame_size <<= 8;\n");
      sb.append("    __frame_size += __temp;\n");

      sb.append("    FileReader_read(__file_descr__");
      sb.append(selfID);
      sb.append(", &__temp, 1);\n");
      sb.append("    PUSH(__temp);\n");
      sb.append("    __frame_size <<= 8;\n");
      sb.append("    __frame_size += __temp;\n");

      sb.append("    FileReader_read(__file_descr__");
      sb.append(selfID);
      sb.append(", &__temp, 1);\n");
      sb.append("    PUSH(__temp);\n");
      sb.append("    __frame_size <<= 8;\n");
      sb.append("    __frame_size += __temp;\n");

      // the frame size includes the four bytes used to state the frame size
      sb.append("    FileReader_read(__file_descr__");
      sb.append(selfID);
      sb.append(", (void *)(BUFFER + HEAD), __frame_size - 4);\n");
      sb.append("    HEAD += __frame_size - 4;\n");
    } else {
      sb.append("    PUSH(FileReader_read<");
      sb.append(theType);
      sb.append(">(__file_descr__");
      sb.append(selfID);
      sb.append("));\n");
    }
    sb.append("  }\n");

    String template = sb.toString();

    /*
               "  #ifdef FUSED" + "\n" +
               "    #ifdef NOMOD" + "\n" +
               "      // read directly into buffer" + "\n" +
               "      if (fread(&(BUFFER[HEAD]), sizeof(BUFFER[HEAD]), ____n, FILEREADER)) {" + "\n" +
               "        HEAD+=____n;" + "\n" +
               "      }" + "\n" +
               "    #else" + "\n" +
               "      // wraparound buffer, might have to read in two pieces (but never" + "\n" +
               "      // more, since we would overwrote what we already wrote on this call)" + "\n" +
               "      if (HEAD+____n <= __BUF_SIZE_MASK) {" + "\n" +
               "          // no overflow" + "\n" +
               "          if (fread(&(BUFFER[HEAD]), sizeof(BUFFER[HEAD]), ____n, FILEREADER)) {" + "\n" +
               "             HEAD+=____n;" + "\n" +
               "          }" + "\n" +
               "      } else {" + "\n" +
               "          // overflow, need two pieces" + "\n" +
               "          int piece1 = __BUF_SIZE_MASK - HEAD;" + "\n" +
               "          int piece2 = ____n - piece1;" + "\n" +
               "          if (fread(&(BUFFER[HEAD]), sizeof(BUFFER[HEAD]), piece1, FILEREADER)) {" + "\n" +
               "              if (fread(&(BUFFER[0]), sizeof(BUFFER[HEAD]), piece2, FILEREADER)) {" + "\n" +
               "                HEAD+=____n;" + "\n" +
               "                HEAD&=__BUF_SIZE_MASK;" + "\n" +
               "              }" + "\n" +
               "          }" + "\n" +
               "      }" + "\n" +
               "     #endif" + "\n" +
               "  #else" + "\n" +
               "    // read as a block" + "\n" +
               "    TYPE __buffer[____n];" + "\n" +
               "    int __index;" + "\n" +
               "    if (fread(__buffer, sizeof(__buffer[0]), ____n, FILEREADER)) {" + "\n" +
               "      for (__index=0; __index < ____n; __index++) {" + "\n" +
               "       // should move push out of loop, but not clear if mult-push implemented yet" + "\n" +
               "       PUSH(__buffer[__index]);" + "\n" +
               "      }" + "\n" +
               "    }" + "\n" +
               "  #endif";
    */

    // set values of free variables
    String TYPE = theType;
    String FILEREADER = fpName(filter);
    String FUSED = "__FUSED_" + s + "_" + d;
    String NOMOD = "__NOMOD_" + s + "_" + d;
    String BUFFER = "BUFFER_" + s + "_" + d;
    String HEAD = "HEAD_" + s + "_" + d;
    String BUF_SIZE_MASK = "__BUF_SIZE_MASK_" + s + "_" + d;
    String PUSH = outputTape.getPushName();

    // replace templates with correct values
    template = Utils.replaceAll(template, "TYPE", TYPE);
    template = Utils.replaceAll(template, "FILEREADER", FILEREADER);
    template = Utils.replaceAll(template, "FUSED", FUSED);
    template = Utils.replaceAll(template, "NOMOD", NOMOD);
    template = Utils.replaceAll(template, "BUFFER", BUFFER);
    template = Utils.replaceAll(template, "HEAD", HEAD);
    template = Utils.replaceAll(template, "BUF_SIZE_MASK", BUF_SIZE_MASK);
    template = Utils.replaceAll(template, "PUSH", PUSH);

    // output code
    p.println(template);
  }