uspace/app/sbi/src/cspan.c

   1 /*
   2  * Copyright (c) 2010 Jiri Svoboda
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @file Coordinate span
  30  *
  31  * Captures the origin (input object, starting and ending line number and
  32  * columnt number) of a code fragment.
  33  */
  34
  35 #include <assert.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include "mytypes.h"
  39
  40 #include "cspan.h"
  41
  42 /** Allocate new coordinate span.
  43  *
  44  * @param       input   Input object.
  45  * @param       line    Starting line number.
  46  * @param       col0    Starting column number.
  47  * @param       line    Ending number (inclusive).
  48  * @param       col1    Ending column number (inclusive).
  49  *
  50  * @return      New coordinate span.
  51  */
  52 cspan_t *cspan_new(input_t *input, int line0, int col0, int line1, int col1)
  53 {
  54         cspan_t *cspan;
  55
  56         cspan = calloc(1, sizeof(cspan_t));
  57         if (cspan == NULL) {
  58                 printf("Memory allocation failed.\n");
  59                 exit(1);
  60         }
  61
  62         cspan->input = input;
  63         cspan->line0 = line0;
  64         cspan->col0 = col0;
  65         cspan->line1 = line1;
  66         cspan->col1 = col1;
  67
  68         return cspan;
  69 }
  70
  71 /** Create a merged coordinate span.
  72  *
  73  * Creates the smalles cspan covering cpans @a a and @a b. Both spans
  74  * must be from the same input object and @a a must start earlier
  75  * than @a b terminates.
  76  *
  77  * @param       a       First coordinate span
  78  * @param       b       Second coordinate span
  79  * @return      New coordinate span.
  80  */
  81 cspan_t *cspan_merge(cspan_t *a, cspan_t *b)
  82 {
  83         assert(a != NULL);
  84         assert(b != NULL);
  85         assert(a->input == b->input);
  86
  87         return cspan_new(a->input, a->line0, a->col0, b->line1, b->col1);
  88 }
  89
  90 /** Print coordinate span.
  91  *
  92  * @param cspan         Coordinate span
  93  */
  94 void cspan_print(cspan_t *cspan)
  95 {
  96         printf("%s:", cspan->input->name);
  97
  98         if (cspan->line0 != cspan->line1) {
  99                 printf("%d:%d-%d:%d", cspan->line0, cspan->col0, cspan->line1,
 100                     cspan->col1);
 101         } else {
 102                 printf("%d:%d-%d", cspan->line0, cspan->col0, cspan->col1);
 103         }
 104 }