source/interface.c

   1
   2     /*+-----------------------------------------------------------------**
   3      **                       OpenScop Library                          **
   4      **-----------------------------------------------------------------**
   5      **                          interface.c                            **
   6      **-----------------------------------------------------------------**
   7      **                   First version: 15/07/2011                     **
   8      **-----------------------------------------------------------------**
   9
  10
  11  *****************************************************************************
  12  * OpenScop: Structures and formats for polyhedral tools to talk together    *
  13  *****************************************************************************
  14  *    ,___,,_,__,,__,,__,,__,,_,__,,_,__,,__,,___,_,__,,_,__,                *
  15  *    /   / /  //  //  //  // /   / /  //  //   / /  // /  /|,_,             *
  16  *   /   / /  //  //  //  // /   / /  //  //   / /  // /  / / /\             *
  17  *  |~~~|~|~~~|~~~|~~~|~~~|~|~~~|~|~~~|~~~|~~~|~|~~~|~|~~~|/_/  \            *
  18  *  | G |C| P | = | L | P |=| = |C| = | = | = |=| = |=| C |\  \ /\           *
  19  *  | R |l| o | = | e | l |=| = |a| = | = | = |=| = |=| L | \# \ /\          *
  20  *  | A |a| l | = | t | u |=| = |n| = | = | = |=| = |=| o | |\# \  \         *
  21  *  | P |n| l | = | s | t |=| = |d| = | = | = | |   |=| o | | \# \  \        *
  22  *  | H | | y |   | e | o | | = |l|   |   | = | |   | | G | |  \  \  \       *
  23  *  | I | |   |   | e |   | |   | |   |   |   | |   | |   | |   \  \  \      *
  24  *  | T | |   |   |   |   | |   | |   |   |   | |   | |   | |    \  \  \     *
  25  *  | E | |   |   |   |   | |   | |   |   |   | |   | |   | |     \  \  \    *
  26  *  | * |*| * | * | * | * |*| * |*| * | * | * |*| * |*| * | /      \* \  \   *
  27  *  | O |p| e | n | S | c |o| p |-| L | i | b |r| a |r| y |/        \  \ /   *
  28  *  '---'-'---'---'---'---'-'---'-'---'---'---'-'---'-'---'          '--'    *
  29  *                                                                           *
  30  * Copyright (C) 2008 University Paris-Sud 11 and INRIA                      *
  31  *                                                                           *
  32  * (3-clause BSD license)                                                    *
  33  * Redistribution and use in source  and binary forms, with or without       *
  34  * modification, are permitted provided that the following conditions        *
  35  * are met:                                                                  *
  36  *                                                                           *
  37  * 1. Redistributions of source code must retain the above copyright notice, *
  38  *    this list of conditions and the following disclaimer.                  *
  39  * 2. Redistributions in binary form must reproduce the above copyright      *
  40  *    notice, this list of conditions and the following disclaimer in the    *
  41  *    documentation and/or other materials provided with the distribution.   *
  42  * 3. The name of the author may not be used to endorse or promote products  *
  43  *    derived from this software without specific prior written permission.  *
  44  *                                                                           *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR      *
  46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES *
  47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.   *
  48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,          *
  49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT  *
  50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, *
  51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY     *
  52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT       *
  53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF  *
  54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.         *
  55  *                                                                           *
  56  * OpenScop Library, a library to manipulate OpenScop formats and data       *
  57  * structures. Written by:                                                   *
  58  * Cedric Bastoul     <Cedric.Bastoul@u-psud.fr> and                         *
  59  * Louis-Noel Pouchet <Louis-Noel.pouchet@inria.fr>                          *
  60  *                                                                           *
  61  *****************************************************************************/
  62
  63 # include <stdlib.h>
  64 # include <stdio.h>
  65 # include <string.h>
  66 # include <osl/interface.h>
  67
  68
  69 /*+***************************************************************************
  70  *                          Structure display function                       *
  71  *****************************************************************************/
  72
  73
  74 /**
  75  * osl_interface_idump function:
  76  * this function displays an osl_interface_t structure (*interface) into
  77  * a file (file, possibly stdout) in a way that trends to be understandable.
  78  * It includes an indentation level (level) in order to work with others
  79  * print_structure functions.
  80  * \param file      The file where the information has to be printed.
  81  * \param interface The interface structure which has to be printed.
  82  * \param level     Number of spaces before printing, for each line.
  83  */
  84 void osl_interface_idump(FILE * file, osl_interface_p interface, int level) {
  85   int j, first = 1;
  86
  87   // Go to the right level.
  88   for (j = 0; j < level; j++)
  89     fprintf(file, "|\t");
  90
  91   if (interface != NULL)
  92     fprintf(file, "+-- osl_interface_t: URI = %s\n", interface->URI);
  93   else
  94     fprintf(file, "+-- NULL interface\n");
  95
  96
  97   while (interface != NULL) {
  98     if (!first) {
  99       // Go to the right level.
 100       for (j = 0; j < level; j++)
 101         fprintf(file, "|\t");
 102       fprintf(file, "|   osl_interface_t: URI = %s\n", interface->URI);
 103     }
 104     else
 105       first = 0;
 106
 107     interface = interface->next;
 108
 109     // Next line.
 110     if (interface != NULL) {
 111       for (j = 0; j <= level + 1; j++)
 112         fprintf(file, "|\t");
 113       fprintf(file, "\n");
 114       for (j = 0; j <= level; j++)
 115         fprintf(file, "|\t");
 116       fprintf(file, "V\n");
 117     }
 118   }
 119
 120   // The last line.
 121   for (j = 0; j <= level; j++)
 122     fprintf(file, "|\t");
 123   fprintf(file, "\n");
 124 }
 125
 126
 127 /**
 128  * osl_interface_dump function:
 129  * this function prints the content of a osl_interface_t structure
 130  * (*interface) into a file (file, possibly stdout).
 131  * \param file  File where informations are printed.
 132  * \param extension The extension idstructure to print.
 133  */
 134 void osl_interface_dump(FILE * file, osl_interface_p interface) {
 135   osl_interface_idump(file, interface, 0);
 136 }
 137
 138
 139 /*****************************************************************************
 140  *                               Reading function                            *
 141  *****************************************************************************/
 142
 143
 144 /*+***************************************************************************
 145  *                    Memory allocation/deallocation function                *
 146  *****************************************************************************/
 147
 148
 149 /**
 150  * osl_interface_add function:
 151  * this function adds an interface node (it may be a list as well) to a
 152  * list of interfaces provided as parameter (list). The new node
 153  * is inserted at the end of the list.
 154  * \param list      The list of interfaces to add a node (NULL if empty).
 155  * \param interface The interface to add to the list.
 156  */
 157 void osl_interface_add(osl_interface_p * list,
 158                             osl_interface_p interface) {
 159   osl_interface_p tmp = *list, check_interface;
 160
 161   if (interface != NULL) {
 162     // First, check that the interface list is OK.
 163     check_interface = interface;
 164     while (check_interface != NULL) {
 165       if (check_interface->URI == NULL)
 166         OSL_error("no URI in an interface to add to a list");
 167
 168       if (osl_interface_lookup(*list, check_interface->URI) != NULL)
 169         OSL_error("only one interface with a given URI is allowed");
 170       check_interface = check_interface->next;
 171     }
 172
 173     if (*list != NULL) {
 174       while (tmp->next != NULL)
 175         tmp = tmp->next;
 176       tmp->next = interface;
 177     }
 178     else {
 179       *list = interface;
 180     }
 181   }
 182 }
 183
 184
 185 /**
 186  * osl_interface_malloc function:
 187  * This function allocates the memory space for a osl_interface_t
 188  * structure and sets its fields with default values. Then it returns a
 189  * pointer to the allocated space.
 190  * \return A pointer to an empty interface structure with fields set to
 191  *         default values.
 192  */
 193 osl_interface_p osl_interface_malloc() {
 194   osl_interface_p interface;
 195
 196   OSL_malloc(interface, osl_interface_p,
 197                   sizeof(osl_interface_t));
 198   interface->URI    = NULL;
 199   interface->idump  = NULL;
 200   interface->sprint = NULL;
 201   interface->sread  = NULL;
 202   interface->malloc = NULL;
 203   interface->free   = NULL;
 204   interface->clone  = NULL;
 205   interface->equal  = NULL;
 206   interface->next   = NULL;
 207
 208   return interface;
 209 }
 210
 211
 212 /**
 213  * osl_interface_free function:
 214  * this function frees the allocated memory for an osl_interface_t
 215  * structure, and all the interfaces stored in the list.
 216  * \param[in] id The pointer to the interface we want to free.
 217  */
 218 void osl_interface_free(osl_interface_p interface) {
 219   osl_interface_p tmp;
 220   int i = 0;
 221
 222   if (interface == NULL)
 223     return;
 224
 225   while (interface != NULL) {
 226     tmp = interface->next;
 227     if (interface->URI != NULL)
 228       free(interface->URI);
 229     free(interface);
 230     interface = tmp;
 231     i++;
 232   }
 233 }
 234
 235
 236 /*+***************************************************************************
 237  *                            Processing functions                           *
 238  *****************************************************************************/
 239
 240
 241 /**
 242  * osl_interface_nclone function:
 243  * This function builds and returns a "hard copy" (not a pointer copy) of the
 244  * n first elements of an osl_interface_t list.
 245  * \param interface The pointer to the interface structure we want to clone.
 246  * \param n         The number of nodes we want to copy (-1 for infinity).
 247  * \return The clone of the n first nodes of the interface list.
 248  */
 249 osl_interface_p osl_interface_nclone(osl_interface_p interface, int n) {
 250   osl_interface_p clone = NULL, new;
 251   int i = 0;
 252
 253   while ((interface != NULL) && ((n == -1) || (i < n))) {
 254     new = osl_interface_malloc();
 255     OSL_strdup(new->URI, interface->URI);
 256     new->idump  = interface->idump;
 257     new->sprint = interface->sprint;
 258     new->sread  = interface->sread;
 259     new->malloc = interface->malloc;
 260     new->free   = interface->free;
 261     new->clone  = interface->clone;
 262     new->equal  = interface->equal;
 263
 264     osl_interface_add(&clone, new);
 265     interface = interface->next;
 266     i++;
 267   }
 268
 269   return clone;
 270 }
 271
 272
 273 /**
 274  * osl_interface_clone function:
 275  * This function builds and returns a "hard copy" (not a pointer copy) of an
 276  * osl_interface_t data structure.
 277  * \param interface The pointer to the interface structure we want to copy.
 278  * \return A pointer to the copy of the interface structure.
 279  */
 280 osl_interface_p osl_interface_clone(osl_interface_p interface) {
 281
 282   return osl_interface_nclone(interface, -1);
 283 }
 284
 285
 286 /**
 287  * osl_interface_equal function:
 288  * this function returns true if the two interface structures are the same,
 289  * (content-wise) false otherwise.
 290  * \param interface1 The first interface structure.
 291  * \param interface2 The second interface structure.
 292  * \return 1 if interface1 and interface2 are the same, 0 otherwise.
 293  */
 294 int osl_interface_equal(osl_interface_p interface1,
 295                         osl_interface_p interface2) {
 296
 297   if (interface1 == interface2)
 298     return 1;
 299
 300   if (((interface1 == NULL) && (interface2 != NULL)) ||
 301       ((interface1 != NULL) && (interface2 == NULL)))
 302     return 0;
 303
 304   if (strcmp(interface1->URI, interface2->URI)   ||
 305       (interface1->idump  != interface2->idump)  ||
 306       (interface1->sprint != interface2->sprint) ||
 307       (interface1->sread  != interface2->sread)  ||
 308       (interface1->malloc != interface2->malloc) ||
 309       (interface1->free   != interface2->free)   ||
 310       (interface1->clone  != interface2->clone)  ||
 311       (interface1->equal  != interface2->equal))
 312     return 0;
 313
 314   return 1;
 315 }
 316
 317
 318 /**
 319  * osl_interface_lookup function:
 320  * this function returns the first interface with a given URI in the
 321  * interface list provided as parameter and NULL if it doesn't find such
 322  * an interface.
 323  * \param list The interface list where to search a given interface URI.
 324  * \param URI  The URI of the interface we are looking for.
 325  * \return The first interface of the requested URI in the list.
 326  */
 327 osl_interface_p
 328 osl_interface_lookup(osl_interface_p list, char * URI) {
 329   while (list != NULL) {
 330     if ((list->URI != NULL) && (!strcmp(list->URI, URI)))
 331       return list;
 332
 333     list = list->next;
 334   }
 335
 336   return NULL;
 337 }
 338