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