text: 
  /*+-----------------------------------------------------------------**
   **                       OpenScop Library                          **
   **-----------------------------------------------------------------**
   **                     extensions/textual.c                        **
   **-----------------------------------------------------------------**
   **                   First version: 15/17/2010                     **
   **-----------------------------------------------------------------**
  
  
  *****************************************************************************
  * OpenScop: Structures and formats for polyhedral tools to talk together    *
  *****************************************************************************
  *    ,___,,_,__,,__,,__,,__,,_,__,,_,__,,__,,___,_,__,,_,__,                *
  *    /   / /  //  //  //  // /   / /  //  //   / /  // /  /|,_,             *
  *   /   / /  //  //  //  // /   / /  //  //   / /  // /  / / /\             *
  *  |~~~|~|~~~|~~~|~~~|~~~|~|~~~|~|~~~|~~~|~~~|~|~~~|~|~~~|/_/  \            *
  *  | G |C| P | = | L | P |=| = |C| = | = | = |=| = |=| C |\  \ /\           *
  *  | R |l| o | = | e | l |=| = |a| = | = | = |=| = |=| L | \# \ /\          *
  *  | A |a| l | = | t | u |=| = |n| = | = | = |=| = |=| o | |\# \  \         *
  *  | P |n| l | = | s | t |=| = |d| = | = | = | |   |=| o | | \# \  \        *
  *  | H | | y |   | e | o | | = |l|   |   | = | |   | | G | |  \  \  \       *
  *  | I | |   |   | e |   | |   | |   |   |   | |   | |   | |   \  \  \      *
  *  | T | |   |   |   |   | |   | |   |   |   | |   | |   | |    \  \  \     *
  *  | E | |   |   |   |   | |   | |   |   |   | |   | |   | |     \  \  \    *
  *  | * |*| * | * | * | * |*| * |*| * | * | * |*| * |*| * | /      \* \  \   *
  *  | O |p| e | n | S | c |o| p |-| L | i | b |r| a |r| y |/        \  \ /   *
  *  '---'-'---'---'---'---'-'---'-'---'---'---'-'---'-'---'          '--'    *
  *                                                                           *
  * Copyright (C) 2008 University Paris-Sud 11 and INRIA                      *
  *                                                                           *
  * (3-clause BSD license)                                                    *
  * 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. The name of the author may not be used to endorse or promote products  *
  *    derived from this software without specific prior written permission.  *
  *                                                                           *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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 OF  *
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.         *
  *                                                                           *
  * OpenScop Library, a library to manipulate OpenScop formats and data       *
  * structures. Written by:                                                   *
  * Cedric Bastoul     <Cedric.Bastoul@u-psud.fr> and                         *
  * Louis-Noel Pouchet <Louis-Noel.pouchet@inria.fr>                          *
  *                                                                           *
  *****************************************************************************/
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  
  #include <osl/macros.h>
  #include <osl/util.h>
  #include <osl/interface.h>
  #include <osl/extensions/textual.h>
  
  
  /* CAUTION : TEXTUAL IS A VERY SPECIAL CASE: DO NOT USE IT AS AN EXAMPLE !!! */
  
  
  /*+***************************************************************************
   *                          Structure display function                       *
   *****************************************************************************/
  
  
  /**
   * osl_textual_idump function:
   * this function displays an osl_textual_t structure (*textual) into a
   * file (file, possibly stdout) in a way that trends to be understandable. It
   * includes an indentation level (level) in order to work with others
   * idump functions.
   * \param[in] file    The file where the information has to be printed.
   * \param[in] textual The textual structure to be printed.
   * \param[in] level   Number of spaces before printing, for each line.
   */
  void osl_textual_idump(FILE * file, osl_textual_p textual, int level) {
      int j;
      char * tmp;
  
      // Go to the right level.
      for (j = 0; j < level; j++)
          fprintf(file, "|\t");
  
      if (textual != NULL) {
          fprintf(file, "+-- osl_textual_t: ");
  
          // Display the textual message (without any carriage return).
          OSL_strdup(tmp, textual->textual);
          for (j = 0; j < (int)strlen(tmp); j++)
              if (tmp[j] == '\n')
                  tmp[j] = ' ';
  
          if (strlen(tmp) > 40) {
              for (j = 0; j < 20; j++)
                  fprintf(file, "%c", tmp[j]);
              fprintf(file, "   ...   ");
              for (j = (int)strlen(tmp) - 20; j < (int)strlen(tmp); j++)
                  fprintf(file, "%c", tmp[j]);
              fprintf(file, "\n");
          } else {
              fprintf(file,"%s\n", tmp);
          }
          free(tmp);
      } else {
          fprintf(file, "+-- NULL textual\n");
      }
  
      // The last line.
      for (j = 0; j <= level; j++)
          fprintf(file, "|\t");
      fprintf(file, "\n");
  }
  
  
  /**
   * osl_textual_dump function:
   * this function prints the content of an osl_textual_t structure
   * (*textual) into a file (file, possibly stdout).
   * \param[in] file    The file where the information has to be printed.
   * \param[in] textual The textual structure to be printed.
   */
  void osl_textual_dump(FILE * file, osl_textual_p textual) {
      osl_textual_idump(file, textual, 0);
  }
  
  
  
  #if 0
  /**
   * osl_textual_sprint function:
   * this function prints the content of an osl_textual_t structure
   * (*textual) into a string (returned) in the OpenScop textual format.
   * \param[in]  textual The textual structure to be printed.
   * \return A string containing the OpenScop dump of the textual structure.
   */
  char * osl_textual_sprint(osl_textual_p textual) {
      char * string = NULL;
  
      if ((textual != NULL) && (textual->textual != NULL)) {
          if (strlen(textual->textual) > OSL_MAX_STRING)
              OSL_error("textual too long");
  
          string = strdup(textual->textual);
          if (string == NULL)
              OSL_error("memory overflow");
      }
  
      return string;
  }
  #else
  /**
   * osl_textual_sprint function:
   * this function returns NULL. This is part of the special behavior of
   * the textual option (printing it along with other options would double
   * the options...).
   * \param[in]  textual The textual structure to be printed.
   * \return NULL.
   */
  char * osl_textual_sprint(osl_textual_p textual) {
      (void) textual;
      return NULL;
  }
  #endif
  
  
  /*****************************************************************************
   *                               Reading function                            *
   *****************************************************************************/
  
  
  /**
   * osl_textual_sread function:
   * this function reads a textual structure from a string complying to the
   * OpenScop textual format and returns a pointer to this textual structure.
   * The string should contain only one textual format of a textual structure.
   * \param[in,out] extensions The input string where to find a textual struct.
   *                           Updated to the position after what has been read.
   * \return A pointer to the textual structure that has been read.
   */
  osl_textual_p osl_textual_sread(char ** extensions) {
      osl_textual_p textual = NULL;
  
      if (*extensions != NULL) {
          textual = osl_textual_malloc();
          OSL_strdup(textual->textual, *extensions);
  
          // Update the input string pointer to the end of the string (since
          // everything has been read).
          *extensions = *extensions + strlen(*extensions);
      }
  
      return textual;
  }
  
  
  /*+***************************************************************************
   *                    Memory allocation/deallocation function                *
   *****************************************************************************/
  
  
  /**
   * osl_textual_malloc function:
   * this function allocates the memory space for an osl_textual_t
   * structure and sets its fields with default values. Then it returns a
   * pointer to the allocated space.
   * \return A pointer to an empty textual structure with fields set to
   *         default values.
   */
  osl_textual_p osl_textual_malloc(void) {
      osl_textual_p textual;
  
      OSL_malloc(textual, osl_textual_p, sizeof(osl_textual_t));
      textual->textual = NULL;
  
      return textual;
  }
  
  
  /**
   * osl_textual_free function:
   * this function frees the allocated memory for an osl_textual_t
   * structure.
   * \param[in,out] textual The pointer to the textual structure to be freed.
   */
  void osl_textual_free(osl_textual_p textual) {
      if (textual != NULL) {
          if(textual->textual != NULL)
              free(textual->textual);
          free(textual);
      }
  }
  
  
  /*+***************************************************************************
   *                            Processing functions                           *
   *****************************************************************************/
  
  
  /**
   * osl_textual_clone function:
   * this function builds and returns a "hard copy" (not a pointer copy) of an
   * osl_textual_t data structure.
   * \param[in] textual The pointer to the textual structure we want to clone.
   * \return A pointer to the clone of the textual structure.
   */
  osl_textual_p osl_textual_clone(osl_textual_p textual) {
      osl_textual_p clone;
  
      if (textual == NULL)
          return NULL;
  
      clone = osl_textual_malloc();
      OSL_strdup(clone->textual, textual->textual);
  
      return clone;
  }
  
  
  #if 0
  /**
   * osl_textual_equal function:
   * this function returns true if the two textual structures are the same
   * (content-wise), false otherwise.
   * \param f1  The first textual structure.
   * \param ff  The second textual structure.
   * \return 1 if f1 and f2 are the same (content-wise), 0 otherwise.
   */
  int osl_textual_equal(osl_textual_p f1, osl_textual_p f2) {
  
      if (f1 == f2)
          return 1;
  
      if (((f1 == NULL) && (f2 != NULL)) || ((f1 != NULL) && (f2 == NULL)))
          return 0;
  
      if (strcmp(f1->textual, f2->textual))
          return 0;
  
      return 1;
  }
  #else
  /**
   * osl_textual_equal function:
   * this function returns 1. This is part of the special behavior of
   * the textual option (the text string can be easily different while the
   * options are actually identical.
   * \param[in] f1  The first textual structure.
   * \param[in] f2  The second textual structure.
   * \return 1.
   */
  int osl_textual_equal(osl_textual_p f1, osl_textual_p f2) {
      (void) f1;
      (void) f2;
      return 1;
  }
  #endif
  
  
  /**
   * osl_textual_interface function:
   * this function creates an interface structure corresponding to the textual
   * extension and returns it).
   * \return An interface structure for the textual extension.
   */
  osl_interface_p osl_textual_interface(void) {
      osl_interface_p interface = osl_interface_malloc();
  
      OSL_strdup(interface->URI, OSL_URI_TEXTUAL);
      interface->idump  = (osl_idump_f)osl_textual_idump;
      interface->sprint = (osl_sprint_f)osl_textual_sprint;
      interface->sread  = (osl_sread_f)osl_textual_sread;
      interface->malloc = (osl_malloc_f)osl_textual_malloc;
      interface->free   = (osl_free_f)osl_textual_free;
      interface->clone  = (osl_clone_f)osl_textual_clone;
      interface->equal  = (osl_equal_f)osl_textual_equal;
  
      return interface;
  }
  
  