git.sur5r.net Git - cc65/blob - src/common/filepos.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 filepos.c                                 */
   4 /*                                                                           */
   5 /*                       File position data structure                        */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998-2011, Ullrich von Bassewitz                                      */
  10 /*                Roemerstrasse 52                                           */
  11 /*                D-70794 Filderstadt                                        */
  12 /* EMail:         uz@cc65.org                                                */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 /* common */
  37 #include "filepos.h"
  38
  39
  40
  41 /*****************************************************************************/
  42 /*                                   Code                                    */
  43 /*****************************************************************************/
  44
  45
  46
  47 void InitFilePos (FilePos* P)
  48 /* Initialize the file position (set all fields to zero) */
  49 {
  50     P->Line = 0;
  51     P->Col  = 0;
  52     P->Name = 0;
  53 }
  54
  55
  56
  57 int CompareFilePos (const FilePos* P1, const FilePos* P2)
  58 /* Compare two file positions. Return zero if both are equal, return a value
  59  * > 0 if P1 is greater and P2, and a value < 0 if P1 is less than P2. The
  60  * compare rates file index over line over column.
  61  */
  62 {
  63     if (P1->Name > P2->Name) {
  64         return 1;
  65     } else if (P1->Name < P2->Name) {
  66         return -1;
  67     } else if (P1->Line > P2->Line) {
  68         return 1;
  69     } else if (P1->Line < P2->Line) {
  70         return -1;
  71     } else if (P1->Col > P2->Col) {
  72         return 1;
  73     } else if (P1->Col < P2->Col) {
  74         return -1;
  75     } else {
  76         return 0;
  77     }
  78 }