/* If LOC is the virtual location of a token coming from the expansion
of a macro M and if its spelling location is reserved (e.g, a
location for a built-in token), then this function unwinds (using
linemap_unwind_toward_expansion) the location until a location that
is not reserved and is not in a system header is reached. In other
words, this unwinds the reserved location until a location that is
in real source code is reached.
Otherwise, if the spelling location for LOC is not reserved or if
LOC doesn't come from the expansion of a macro, the function
returns LOC as is and *MAP is not touched.
*MAP is set to the map of the returned location if the later is
different from LOC. */
source_location
linemap_unwind_to_first_non_reserved_loc (struct line_maps *set,
source_location loc,
const struct line_map **map)
{
source_location resolved_loc;
const struct line_map *map0 = NULL, *map1 = NULL;
map0 = linemap_lookup (set, loc);
if (!linemap_macro_expansion_map_p (map0))
return loc;
resolved_loc = linemap_resolve_location (set, loc,
LRK_SPELLING_LOCATION,
&map1);
if (resolved_loc >= RESERVED_LOCATION_COUNT
&& !LINEMAP_SYSP (map1))
return loc;
while (linemap_macro_expansion_map_p (map0)
&& (resolved_loc < RESERVED_LOCATION_COUNT
|| LINEMAP_SYSP (map1)))
{
loc = linemap_unwind_toward_expansion (set, loc, &map0);
resolved_loc = linemap_resolve_location (set, loc,
LRK_SPELLING_LOCATION,
&map1);
}
if (map != NULL)
*map = map0;
return loc;
}
int
linemap_compare_locations (struct line_maps *set,
source_location pre,
source_location post)
{
bool pre_virtual_p, post_virtual_p;
source_location l0 = pre, l1 = post;
if (l0 == l1)
return 0;
if ((pre_virtual_p = linemap_location_from_macro_expansion_p (set, l0)))
l0 = linemap_resolve_location (set, l0,
LRK_MACRO_EXPANSION_POINT,
NULL);
if ((post_virtual_p = linemap_location_from_macro_expansion_p (set, l1)))
l1 = linemap_resolve_location (set, l1,
LRK_MACRO_EXPANSION_POINT,
NULL);
if (l0 == l1
&& pre_virtual_p
&& post_virtual_p)
{
/* So pre and post represent two tokens that are present in a
same macro expansion. Let's see if the token for pre was
before the token for post in that expansion. */
unsigned i0, i1;
const struct line_map *map =
first_map_in_common (set, pre, post, &l0, &l1);
if (map == NULL)
/* This should not be possible. */
abort ();
i0 = l0 - MAP_START_LOCATION (map);
i1 = l1 - MAP_START_LOCATION (map);
return i1 - i0;
}
return l1 - l0;
}
static expanded_location
expand_location_1 (source_location loc,
bool expansion_point_p)
{
expanded_location xloc;
const struct line_map *map;
enum location_resolution_kind lrk = LRK_MACRO_EXPANSION_POINT;
tree block = NULL;
if (IS_ADHOC_LOC (loc))
{
block = LOCATION_BLOCK (loc);
loc = LOCATION_LOCUS (loc);
}
/* If LOC describes a location with a discriminator, extract the
discriminator and map it to the real location. */
if (min_discriminator_location != UNKNOWN_LOCATION
&& loc >= min_discriminator_location
&& loc < next_discriminator_location)
loc = map_discriminator_location (loc);
memset (&xloc, 0, sizeof (xloc));
if (loc >= RESERVED_LOCATION_COUNT)
{
if (!expansion_point_p)
{
/* We want to resolve LOC to its spelling location.
But if that spelling location is a reserved location that
appears in the context of a macro expansion (like for a
location for a built-in token), let's consider the first
location (toward the expansion point) that is not reserved;
that is, the first location that is in real source code. */
loc = linemap_unwind_to_first_non_reserved_loc (line_table,
loc, &map);
lrk = LRK_SPELLING_LOCATION;
}
loc = linemap_resolve_location (line_table, loc,
lrk, &map);
xloc = linemap_expand_location (line_table, map, loc);
}
xloc.data = block;
if (loc <= BUILTINS_LOCATION)
xloc.file = loc == UNKNOWN_LOCATION ? NULL : _("<built-in>");
return xloc;
}
int
linemap_location_in_system_header_p (struct line_maps *set,
source_location location)
{
const struct line_map *map = NULL;
location =
linemap_resolve_location (set, location, LRK_SPELLING_LOCATION, &map);
if (location < RESERVED_LOCATION_COUNT)
return false;
return LINEMAP_SYSP (map);
}
expanded_location
expand_location (source_location loc)
{
expanded_location xloc;
const struct line_map *map;
loc = linemap_resolve_location (line_table, loc,
LRK_SPELLING_LOCATION, &map);
xloc = linemap_expand_location (line_table, map, loc);
if (loc <= BUILTINS_LOCATION)
xloc.file = loc == UNKNOWN_LOCATION ? NULL : _("<built-in>");
return xloc;
}
void
diagnostic_report_current_module (diagnostic_context *context, location_t where)
{
const struct line_map *map = NULL;
if (pp_needs_newline (context->printer))
{
pp_newline (context->printer);
pp_needs_newline (context->printer) = false;
}
if (where <= BUILTINS_LOCATION)
return;
linemap_resolve_location (line_table, where,
LRK_MACRO_DEFINITION_LOCATION,
&map);
if (map && diagnostic_last_module_changed (context, map))
{
diagnostic_set_last_module (context, map);
if (! MAIN_FILE_P (map))
{
map = INCLUDED_FROM (line_table, map);
if (context->show_column)
pp_verbatim (context->printer,
"In file included from %s:%d:%d",
LINEMAP_FILE (map),
LAST_SOURCE_LINE (map), LAST_SOURCE_COLUMN (map));
else
pp_verbatim (context->printer,
"In file included from %s:%d",
LINEMAP_FILE (map), LAST_SOURCE_LINE (map));
while (! MAIN_FILE_P (map))
{
map = INCLUDED_FROM (line_table, map);
pp_verbatim (context->printer,
",\n from %s:%d",
LINEMAP_FILE (map), LAST_SOURCE_LINE (map));
}
pp_verbatim (context->printer, ":");
pp_newline (context->printer);
}
}
}
void
linemap_dump_location (struct line_maps *set,
source_location loc,
FILE *stream)
{
const struct line_map *map;
source_location location;
const char *path = "", *from = "";
int l = -1, c = -1, s = -1, e = -1;
if (loc == 0)
return;
location =
linemap_resolve_location (set, loc, LRK_MACRO_DEFINITION_LOCATION, &map);
if (map == NULL)
/* Only reserved locations can be tolerated in this case. */
linemap_assert (location < RESERVED_LOCATION_COUNT);
else
{
path = LINEMAP_FILE (map);
l = SOURCE_LINE (map, location);
c = SOURCE_COLUMN (map, location);
s = LINEMAP_SYSP (map) != 0;
e = location != loc;
if (e)
from = "N/A";
else
from = (INCLUDED_FROM (set, map))
? LINEMAP_FILE (INCLUDED_FROM (set, map))
: "<NULL>";
}
/* P: path, L: line, C: column, S: in-system-header, M: map address,
E: macro expansion?, LOC: original location, R: resolved location */
fprintf (stream, "{P:%s;F:%s;L:%d;C:%d;S:%d;M:%p;E:%d,LOC:%d,R:%d}",
path, from, l, c, s, (void*)map, e, loc, location);
}
