X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8efe435c059af57671105fd8671ba97bb8474264..a68b1f237e63c96ee905916424013f79d01908ba:/src/location.c diff --git a/src/location.c b/src/location.c index dd32e5c1..11df5aa0 100644 --- a/src/location.c +++ b/src/location.c @@ -1,24 +1,155 @@ /* Locations for Bison - Copyright (C) 2002 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ + +#include +#include "system.h" +#include +#include +#include "complain.h" #include "location.h" -location_t empty_location = { 0, 0, 0, 0 }; +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 + COLUMN. If an overflow occurs, or might occur but is undetectable, + return INT_MAX. Assume COLUMN is nonnegative. */ + +static inline int +add_column_width (int column, char const *buf, size_t bufsize) +{ + size_t width; + unsigned int remaining_columns = INT_MAX - column; + + if (buf) + { + if (INT_MAX / 2 <= bufsize) + return INT_MAX; + width = mbsnwidth (buf, bufsize, 0); + } + else + width = bufsize; + + return width <= remaining_columns ? column + width : INT_MAX; +} + +/* Set *LOC and adjust scanner cursor to account for token TOKEN of + size SIZE. */ + +void +location_compute (location *loc, boundary *cur, char const *token, size_t size) +{ + int line = cur->line; + int column = cur->column; + char const *p0 = token; + char const *p = token; + char const *lim = token + size; + + loc->start = *cur; + + for (p = token; p < lim; p++) + switch (*p) + { + case '\n': + line += line < INT_MAX; + column = 1; + p0 = p + 1; + break; + + case '\t': + column = add_column_width (column, p0, p - p0); + column = add_column_width (column, NULL, 8 - ((column - 1) & 7)); + p0 = p + 1; + break; + + default: + break; + } + + cur->line = line; + cur->column = column = add_column_width (column, p0, p - p0); + + loc->end = *cur; + + if (line == INT_MAX && loc->start.line != INT_MAX) + warn_at (*loc, _("line number overflow")); + if (column == INT_MAX && loc->start.column != INT_MAX) + warn_at (*loc, _("column number overflow")); +} + + +/* Output to OUT the location LOC. + Warning: it uses quotearg's slot 3. */ +unsigned +location_print (FILE *out, location loc) +{ + 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) + { + 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; +} + +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); +}