mark.c

   1 /*
   2  * (c) 2011 Cyrill Gorcunov, gorcunov@gmail.com
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or (at
   7  * your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <unistd.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include "mark.h"
  28
  29 #include "backend-proto.h"
  30 #include "view.h"
  31 #include "list.h"
  32 #include "util.h"
  33
  34 /* #define DBG(msg, ...) debug(msg, __VA_ARGS__) */
  35 #define DBG(msg, ...)
  36
  37 /* indices on ring */
  38 static unsigned long idx_last;
  39 static unsigned long idx_current;
  40
  41 static struct mark_item marks[MARKS_LIMIT];
  42 static int do_push = 1;
  43
  44 void mark_init(void)
  45 {
  46         idx_last = idx_current = 0;
  47         memset(marks, 0, sizeof(marks));
  48 }
  49
  50 void mark_fini(void)
  51 {
  52         unsigned long i;
  53
  54         for (i = 0; i < idx_last; i++)
  55                 free(marks[i].file_path);
  56
  57         idx_last = idx_current = 0;
  58 }
  59
  60 void mark_push(struct backend_proto_item *item)
  61 {
  62         if (!do_push)
  63                 return;
  64
  65         idx_last++;
  66         if (idx_last >= MARKS_LIMIT) {
  67                 idx_last = MARKS_LIMIT;
  68                 free(marks[idx_last - 1].file_path);
  69         }
  70
  71         DBG("%s: %s:%lu", __func__, item->file, item->line);
  72
  73         idx_current = idx_last - 1;
  74
  75         marks[idx_last - 1].file_path   = xstrdup(item->file);
  76         marks[idx_last - 1].line        = item->line;
  77 }
  78
  79 static void mark_switch_to(struct gscope_info *info, unsigned long idx)
  80 {
  81         struct backend_proto_item item = { 0 };
  82
  83         item.file = marks[idx].file_path;
  84         item.line = marks[idx].line;
  85
  86         do_push = 0;
  87         query_switch_or_read_source_into_notebook(info, &item);
  88         do_push = 1;
  89 }
  90
  91 void mark_switch_to_next(struct gscope_info *info)
  92 {
  93         DBG("%s: %lu %lu", __func__, idx_last, idx_current);
  94
  95         if (idx_last && idx_current < idx_last - 1) {
  96                 idx_current++;
  97                 mark_switch_to(info, idx_current);
  98         }
  99 }
 100
 101 void mark_switch_to_prev(struct gscope_info *info)
 102 {
 103         DBG("%s: %lu %lu", __func__, idx_last, idx_current);
 104
 105         if (idx_current > 0) {
 106                 idx_current--;
 107                 mark_switch_to(info, idx_current);
 108         }
 109 }
 110