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0c8e079fa6
* src/location.c, src/location.h, src/main.c, src/scan-code.l: Add some missing #include's. * src/scan-code.l (handle_action_dollar, handle_action_at): Rename loc argument as it shadows a global. * src/scan-gram.l: Remove stray comma that prevents boundary_set invocation. * src/.cvsignore: Add scan-code.c.
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* Locations for Bison
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Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include <config.h>
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#include "system.h"
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#include <mbswidth.h>
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#include <quotearg.h>
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#include "complain.h"
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#include "location.h"
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location const empty_location;
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/* If BUF is null, add BUFSIZE (which in this case must be less than
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INT_MAX) to COLUMN; otherwise, add mbsnwidth (BUF, BUFSIZE, 0) to
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COLUMN. If an overflow occurs, or might occur but is undetectable,
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return INT_MAX. Assume COLUMN is nonnegative. */
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static inline int
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add_column_width (int column, char const *buf, size_t bufsize)
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{
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size_t width;
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unsigned int remaining_columns = INT_MAX - column;
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if (buf)
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{
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if (INT_MAX / 2 <= bufsize)
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return INT_MAX;
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width = mbsnwidth (buf, bufsize, 0);
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}
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else
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width = bufsize;
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return width <= remaining_columns ? column + width : INT_MAX;
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}
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/* Set *LOC and adjust scanner cursor to account for token TOKEN of
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size SIZE. */
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void
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location_compute (location *loc, boundary *cur, char const *token, size_t size)
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{
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int line = cur->line;
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int column = cur->column;
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char const *p0 = token;
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char const *p = token;
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char const *lim = token + size;
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loc->start = *cur;
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for (p = token; p < lim; p++)
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switch (*p)
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{
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case '\n':
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line += line < INT_MAX;
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column = 1;
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p0 = p + 1;
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break;
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case '\t':
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column = add_column_width (column, p0, p - p0);
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column = add_column_width (column, NULL, 8 - ((column - 1) & 7));
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p0 = p + 1;
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break;
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default:
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break;
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}
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cur->line = line;
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cur->column = column = add_column_width (column, p0, p - p0);
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loc->end = *cur;
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if (line == INT_MAX && loc->start.line != INT_MAX)
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warn_at (*loc, _("line number overflow"));
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if (column == INT_MAX && loc->start.column != INT_MAX)
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warn_at (*loc, _("column number overflow"));
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}
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/* Output to OUT the location LOC.
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Warning: it uses quotearg's slot 3. */
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void
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location_print (FILE *out, location loc)
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{
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int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
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fprintf (out, "%s:%d.%d",
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quotearg_n_style (3, escape_quoting_style, loc.start.file),
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loc.start.line, loc.start.column);
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if (loc.start.file != loc.end.file)
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fprintf (out, "-%s:%d.%d",
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quotearg_n_style (3, escape_quoting_style, loc.end.file),
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loc.end.line, end_col);
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else if (loc.start.line < loc.end.line)
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fprintf (out, "-%d.%d", loc.end.line, end_col);
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else if (loc.start.column < end_col)
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fprintf (out, "-%d", end_col);
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}
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