cspan.c

00001 /*
00002  * Copyright (c) 2010 Jiri Svoboda
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #include <assert.h>
00036 #include <stdio.h>
00037 #include <stdlib.h>
00038 #include "mytypes.h"
00039 
00040 #include "cspan.h"
00041 
00052 cspan_t *cspan_new(input_t *input, int line0, int col0, int line1, int col1)
00053 {
00054         cspan_t *cspan;
00055 
00056         cspan = calloc(1, sizeof(cspan_t));
00057         if (cspan == NULL) {
00058                 printf("Memory allocation failed.\n");
00059                 exit(1);
00060         }
00061 
00062         cspan->input = input;
00063         cspan->line0 = line0;
00064         cspan->col0 = col0;
00065         cspan->line1 = line1;
00066         cspan->col1 = col1;
00067 
00068         return cspan;
00069 }
00070 
00081 cspan_t *cspan_merge(cspan_t *a, cspan_t *b)
00082 {
00083         assert(a != NULL);
00084         assert(b != NULL);
00085         assert(a->input == b->input);
00086 
00087         return cspan_new(a->input, a->line0, a->col0, b->line1, b->col1);
00088 }
00089 
00094 void cspan_print(cspan_t *cspan)
00095 {
00096         printf("%s:", cspan->input->name);
00097 
00098         if (cspan->line0 != cspan->line1) {
00099                 printf("%d:%d-%d:%d", cspan->line0, cspan->col0, cspan->line1,
00100                     cspan->col1);
00101         } else {
00102                 printf("%d:%d-%d", cspan->line0, cspan->col0, cspan->col1);
00103         }
00104 }

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