/* Locations for Bison
- Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.
+
+ Copyright (C) 2002, 2005-2012 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "system.h"
#include "complain.h"
#include "location.h"
-location const empty_location;
+location const empty_location = EMPTY_LOCATION_INIT;
/* If BUF is null, add BUFSIZE (which in this case must be less than
INT_MAX) to COLUMN; otherwise, add mbsnwidth (BUF, BUFSIZE, 0) to
/* Output to OUT the location LOC.
Warning: it uses quotearg's slot 3. */
-void
+unsigned
location_print (FILE *out, location loc)
{
- int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
- fprintf (out, "%s:%d.%d",
- quotearg_n_style (3, escape_quoting_style, loc.start.file),
- loc.start.line, loc.start.column);
-
+ unsigned res = 0;
+ int end_col = 0 != loc.end.column ? loc.end.column - 1 : 0;
+ res += fprintf (out, "%s",
+ quotearg_n_style (3, escape_quoting_style, loc.start.file));
+ if (0 <= loc.start.line)
+ {
+ res += fprintf (out, ":%d", loc.start.line);
+ if (0 <= loc.start.column)
+ res += fprintf (out, ".%d", loc.start.column);
+ }
if (loc.start.file != loc.end.file)
- fprintf (out, "-%s:%d.%d",
- quotearg_n_style (3, escape_quoting_style, loc.end.file),
- loc.end.line, end_col);
- else if (loc.start.line < loc.end.line)
- fprintf (out, "-%d.%d", loc.end.line, end_col);
- else if (loc.start.column < end_col)
- fprintf (out, "-%d", end_col);
+ {
+ res += fprintf (out, "-%s",
+ quotearg_n_style (3, escape_quoting_style,
+ loc.end.file));
+ if (0 <= loc.end.line)
+ {
+ res += fprintf (out, ":%d", loc.end.line);
+ if (0 <= end_col)
+ res += fprintf (out, ".%d", end_col);
+ }
+ }
+ else if (0 <= loc.end.line)
+ {
+ if (loc.start.line < loc.end.line)
+ {
+ res += fprintf (out, "-%d", loc.end.line);
+ if (0 <= end_col)
+ res += fprintf (out, ".%d", end_col);
+ }
+ else if (0 <= end_col && loc.start.column < end_col)
+ res += fprintf (out, "-%d", end_col);
+ }
+
+ return res;
+}
+
+
+/* Persistant data used by location_caret to avoid reopening and rereading the
+ same file all over for each error. */
+struct caret_info
+{
+ FILE* source;
+ size_t line;
+ size_t offset;
+};
+
+static struct caret_info caret_info = { NULL, 1, 0 };
+
+/* Free any allocated ressources and close any open file handles that are
+ left-over by the usage of location_caret. */
+void
+cleanup_caret ()
+{
+ if (caret_info.source)
+ fclose (caret_info.source);
+}
+
+/* Output to OUT the line and caret corresponding to location LOC. */
+void
+location_caret (FILE *out, location loc)
+{
+ /* FIXME: find a way to support X-file locations, and only open once each
+ file. That would make the procedure future-proof. */
+ if (! (caret_info.source
+ || (caret_info.source = fopen (loc.start.file, "r")))
+ || loc.start.column == -1 || loc.start.line == -1)
+ return;
+
+ /* If the line we want to quote is seekable (the same line as the previous
+ location), just seek it. If it was before, we lost track of it, so
+ return to the start of file. */
+ if (caret_info.line <= loc.start.line)
+ fseek (caret_info.source, caret_info.offset, SEEK_SET);
+ else
+ {
+ caret_info.line = 1;
+ caret_info.offset = 0;
+ fseek (caret_info.source, caret_info.offset, SEEK_SET);
+ }
+
+ /* Advance to the line's position, keeping track of the offset. */
+ {
+ int i;
+ for (i = caret_info.line; i < loc.start.line; caret_info.offset++)
+ if (fgetc (caret_info.source) == '\n')
+ ++i;
+ }
+ caret_info.line = loc.start.line;
+
+ /* Read the actual line. Don't update the offset, so that we keep a pointer
+ to the start of the line. */
+ {
+ ssize_t len = 0;
+ char *buf = NULL;
+ if ((len = getline (&buf, (size_t*) &len, caret_info.source)) != -1)
+ {
+ /* The caret of a multiline location ends with the first line. */
+ int end = loc.start.line != loc.end.line ? len : loc.end.column;
+
+ if (len)
+ {
+ int i = loc.start.column;
+ /* Quote the file, indent by a single column. */
+ fputc (' ', out);
+ fwrite (buf, 1, len, out);
+
+ /* Print the caret, with the same indent as above. */
+ fputc (' ', out);
+ fprintf (out, "%*s", loc.start.column - 1, "");
+ do {
+ fputc ('^', out);
+ } while (++i < end);
+ }
+ fputc ('\n', out);
+ free (buf);
+ }
+ }
+}
+
+void
+boundary_set_from_string (boundary *bound, char *loc_str)
+{
+ /* Must search in reverse since the file name field may
+ * contain `.' or `:'. */
+ char *delim = mbsrchr (loc_str, '.');
+ aver (delim);
+ *delim = '\0';
+ bound->column = atoi (delim+1);
+ delim = mbsrchr (loc_str, ':');
+ aver (delim);
+ *delim = '\0';
+ bound->line = atoi (delim+1);
+ bound->file = uniqstr_new (loc_str);
}
projects / bison.git / blobdiff