text: /*******************************************************************************
   * Copyright (c) 2013-2017, Andrés Martinelli <andmarti@gmail.com              *
   * All rights reserved.                                                        *
   *                                                                             *
   * This file is a part of SC-IM                                                *
   *                                                                             *
   * SC-IM is a spreadsheet program that is based on SC. The original authors    *
   * of SC are James Gosling and Mark Weiser, and mods were later added by       *
   * Chuck Martin.                                                               *
   *                                                                             *
   * Redistribution and use in source and binary forms, with or without          *
   * modification, are permitted provided that the following conditions are met: *
   * 1. Redistributions of source code must retain the above copyright           *
   *    notice, this list of conditions and the following disclaimer.            *
   * 2. Redistributions in binary form must reproduce the above copyright        *
   *    notice, this list of conditions and the following disclaimer in the      *
   *    documentation and/or other materials provided with the distribution.     *
   * 3. All advertising materials mentioning features or use of this software    *
   *    must display the following acknowledgement:                              *
   *    This product includes software developed by Andrés Martinelli            *
   *    <andmarti@gmail.com>.                                                    *
   * 4. Neither the name of the Andrés Martinelli nor the                        *
   *   names of other contributors may be used to endorse or promote products    *
   *   derived from this software without specific prior written permission.     *
   *                                                                             *
   * THIS SOFTWARE IS PROVIDED BY ANDRES MARTINELLI ''AS IS'' AND ANY            *
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED   *
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE      *
   * DISCLAIMED. IN NO EVENT SHALL ANDRES MARTINELLI BE LIABLE FOR ANY           *
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES  *
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;*
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND *
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT  *
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE       *
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.           *
   *******************************************************************************/
  
  /**
   * \file TODO <filename>
   * \author Andrés Martinelli <andmarti@gmail.com>
   * \date 2017-07-18
   * \brief TODO Write a tbrief file description.
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <ctype.h>
  #include "sc.h"
  #include "cmds.h"
  #include "color.h"
  #include "macros.h"
  #include "xls.h"
  #include "utils/string.h"
  
  /*
   * xls.h is part of libxls. make sure its installed and headers are in path.
   * build must be done with '-lxlsreader'
   */
  #ifdef XLS
  #include <xls.h>
  #endif
  
  /**
   * \brief TODO <brief function description>
   *
   * \details This function loads an excel file into tbl. As SC-IM still
   * does not handle multiple sheets, if excel file has multiple sheets,
   * only the first one is read.
   *
   * \return -1 on error
   */
  
  int open_xls(char * fname, char * encoding) {
  #ifdef XLS
  
      // Set date format reading LOCALE
      char fmt[15] = "%d/%m/%Y";
  
      #ifdef USELOCALE
      #include <locale.h>
      #include <langinfo.h>
      char * loc = NULL;
      char * f = NULL;
      loc = setlocale(LC_TIME, "");
  
      if (loc != NULL) {
          f = nl_langinfo(D_FMT);
          strcpy(fmt, f);
      }
      #endif
  
      // Read XLS file
      xlsWorkBook * pWB;
      xlsWorkSheet * pWS;
      WORD r, c;
      pWB = xls_open(fname, encoding);
  
      wchar_t line_interp[FBUFLEN] = L"";
      struct ent * n;
  
      if (pWB == NULL) {
          sc_error("Error loading %s", fname);
          return -1;
      }
  
      pWS = xls_getWorkSheet(pWB, 0); //only the first sheet
      if (pWS == NULL) return -1;
      xls_parseWorkSheet(pWS);
  
      for (r = 0; r <= pWS->rows.lastrow; r++) { // rows
          for (c = 0; c <= pWS->rows.lastcol; c++) { // cols
              xlsCell * cell = xls_cell(pWS, r, c);
              if ((! cell) || (cell->isHidden)) continue;
  
              // TODO enable rowspan ?
              //if (cell->rowspan > 1) continue;
  
              struct st_xf_data * xf = &pWB->xfs.xf[cell->xf];
  
              //sc_debug("%d %d fmt:%d id:%x %d %d", r, c, xf->format, cell->id, cell->d, cell->l);
  
              // these are dates
              if (((xf->format >= 14 && xf->format <= 22) ||
                  (xf->format >= 165 && xf->format <= 180) ||
                  xf->format == 278 || xf->format == 185 || xf->format == 196 || xf->format
                  == 217 || xf->format == 326 )
                 && cell->id != 0x06
                 //&& cell->id != 0x27e
                 && cell->id != 0x0BD
                 && cell->id != 0x203 ) {
  
                  swprintf(line_interp, FBUFLEN, L"let %s%d=%.15g", coltoa(c), r, (cell->d - 25569) * 86400);
                  send_to_interp(line_interp);
                  n = lookat(r, c);
                  n->format = 0;
                  char * s = scxmalloc((unsigned)(strlen(fmt) + 2));
                  sprintf(s, "%c", 'd');
                  strcat(s, "%d/%m/%Y");
                  n->format = s;
                  continue;
  
              // display the value of the cell (either numeric or string)
              } else if (cell->id == 0x27e || cell->id == 0x0BD || cell->id == 0x203) {
                  swprintf(line_interp, FBUFLEN, L"let %s%d=%.15g", coltoa(c), r, cell->d);
  
              } else if (cell->id == 0x06) { // formula
                  if (cell->l == 0) {        // its a number
                      swprintf(line_interp, FBUFLEN, L"let %s%d=%.15g", coltoa(c), r, cell->d);
                  } else {
                      if (!strcmp((char *) cell->str, "bool")) {          // its boolean, and test cell->d
                          swprintf(line_interp, FBUFLEN, L"label %s%d=\"%s\"", coltoa(c), r, (int) cell->d ? "true" : "false");
                      } else if (! strcmp((char *) cell->str, "error")) { // formula is in error
                          swprintf(line_interp, FBUFLEN, L"label %s%d=\"%s\"", coltoa(c), r, "error"); //FIXME
                      } else {
                          swprintf(line_interp, FBUFLEN, L"label %s%d=\"%s\"", coltoa(c), r, (char *) cell->str);
                      }
                  }
  
              } else if (cell->str != NULL) {
                  int pad_pos;
                  if ((pad_pos = str_in_str((char *) cell->str, "\n")) != -1) ((char *) cell->str)[pad_pos] = '\0'; // For spanning
                  // clean_carrier((char *) cell->str); // For spanning
                  swprintf(line_interp, FBUFLEN, L"label %s%d=\"%s\"", coltoa(c), r, (char *) cell->str);
              } else {
                  swprintf(line_interp, FBUFLEN, L"label %s%d=\"%s\"", coltoa(c), r, "");
              }
              send_to_interp(line_interp);
          }
      }
      xls_close_WS(pWS);
      xls_close_WB(pWB);
      auto_justify(0, maxcols, DEFWIDTH);
      return 0;
  #else
      return -1;
  #endif
  }
  