/* Muscle table manager for Bison.
- Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include <hash.h>
#include <quotearg.h>
+#include "complain.h"
#include "files.h"
#include "muscle_tab.h"
#include "getargs.h"
+/* A key-value pair, along with storage that can be reclaimed when
+ this pair is no longer needed. */
typedef struct
{
- const char *key;
- char *value;
+ char const *key;
+ char const *value;
+ char *storage;
} muscle_entry;
/* An obstack used to create some entries. */
| Also set up the MUSCLE_OBSTACK. |
`-----------------------------------------------------------------*/
+static void
+muscle_entry_free (void *entry)
+{
+ muscle_entry *mentry = entry;
+ free (mentry->storage);
+ free (mentry);
+}
+
void
muscle_init (void)
{
obstack_init (&muscle_obstack);
muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle,
- hash_compare_muscles, free);
+ hash_compare_muscles, muscle_entry_free);
/* Version and input file. */
MUSCLE_INSERT_STRING ("version", VERSION);
`------------------------------------------------------------*/
void
-muscle_insert (const char *key, char *value)
+muscle_insert (char const *key, char const *value)
{
muscle_entry probe;
muscle_entry *entry;
entry->key = key;
hash_insert (muscle_table, entry);
}
+ else
+ free (entry->storage);
entry->value = value;
+ entry->storage = NULL;
}
/*-------------------------------------------------------------------.
-| Insert (KEY, VALUE). If KEY already existed, overwrite the |
-| previous value. Uses MUSCLE_OBSTACK. De-allocates the previously |
-| associated value. VALUE and SEPARATOR are copied. |
+| Append VALUE to the current value of KEY. If KEY did not already |
+| exist, create it. Use MUSCLE_OBSTACK. De-allocate the previously |
+| associated value. Copy VALUE and SEPARATOR. |
`-------------------------------------------------------------------*/
void
entry = xmalloc (sizeof *entry);
entry->key = key;
hash_insert (muscle_table, entry);
- entry->value = xstrdup (val);
+ entry->value = entry->storage = xstrdup (val);
}
else
{
/* Grow the current value. */
char *new_val;
obstack_sgrow (&muscle_obstack, entry->value);
- free (entry->value);
+ free (entry->storage);
obstack_sgrow (&muscle_obstack, separator);
obstack_sgrow (&muscle_obstack, val);
obstack_1grow (&muscle_obstack, 0);
new_val = obstack_finish (&muscle_obstack);
- entry->value = xstrdup (new_val);
+ entry->value = entry->storage = xstrdup (new_val);
obstack_free (&muscle_obstack, new_val);
}
}
obstack_1grow (&muscle_obstack, 0);
extension = obstack_finish (&muscle_obstack);
muscle_grow (key, extension, "");
+ obstack_free (&muscle_obstack, extension);
}
-/*-------------------------------------------------------------------.
-| MUSCLE is an M4 list of pairs. Create or extend it with the pair |
-| (A1, A2). Note that because the muscle values are output *double* |
-| quoted, one needs to strip the first level of quotes to reach the |
-| list itself. |
-`-------------------------------------------------------------------*/
-
void muscle_pair_list_grow (const char *muscle,
const char *a1, const char *a2)
{
char *pair;
- obstack_fgrow2 (&muscle_obstack, "[[[%s]], [[%s]]]", a1, a2);
+ obstack_sgrow (&muscle_obstack, "[[[");
+ MUSCLE_OBSTACK_SGROW (&muscle_obstack, a1);
+ obstack_sgrow (&muscle_obstack, "]], [[");
+ MUSCLE_OBSTACK_SGROW (&muscle_obstack, a2);
+ obstack_sgrow (&muscle_obstack, "]]]");
obstack_1grow (&muscle_obstack, 0);
pair = obstack_finish (&muscle_obstack);
muscle_grow (muscle, pair, ",\n");
obstack_free (&muscle_obstack, pair);
}
-/*-------------------------------.
-| Find the value of muscle KEY. |
-`-------------------------------*/
-char*
-muscle_find (const char *key)
+/*----------------------------------------------------------------------------.
+| Find the value of muscle KEY. Unlike MUSCLE_FIND, this is always reliable |
+| to determine whether KEY has a value. |
+`----------------------------------------------------------------------------*/
+
+char const *
+muscle_find_const (char const *key)
{
muscle_entry probe;
muscle_entry *result = NULL;
probe.key = key;
result = hash_lookup (muscle_table, &probe);
- return result ? result->value : NULL;
+ if (result)
+ return result->value;
+ return NULL;
+}
+
+
+/*----------------------------------------------------------------------------.
+| Find the value of muscle KEY. Abort if muscle_insert was invoked more |
+| recently than muscle_grow for KEY since muscle_find can't return a |
+| char const *. |
+`----------------------------------------------------------------------------*/
+
+char *
+muscle_find (char const *key)
+{
+ muscle_entry probe;
+ muscle_entry *result = NULL;
+
+ probe.key = key;
+ result = hash_lookup (muscle_table, &probe);
+ if (result)
+ {
+ aver (result->value == result->storage);
+ return result->storage;
+ }
+ return NULL;
+}
+
+
+void
+muscle_boundary_grow (char const *key, boundary bound)
+{
+ char *extension;
+ MUSCLE_OBSTACK_SGROW (&muscle_obstack, bound.file);
+ obstack_1grow (&muscle_obstack, ':');
+ obstack_fgrow1 (&muscle_obstack, "%d", bound.line);
+ obstack_1grow (&muscle_obstack, '.');
+ obstack_fgrow1 (&muscle_obstack, "%d", bound.column);
+ obstack_1grow (&muscle_obstack, '\0');
+ extension = obstack_finish (&muscle_obstack);
+ muscle_grow (key, extension, "");
+ obstack_free (&muscle_obstack, extension);
+}
+
+void
+muscle_location_grow (char const *key, location loc)
+{
+ muscle_grow (key, "[[", "");
+ muscle_boundary_grow (key, loc.start);
+ muscle_grow (key, "]], [[", "");
+ muscle_boundary_grow (key, loc.end);
+ muscle_grow (key, "]]", "");
+}
+
+/* Reverse of muscle_location_grow. */
+static location
+muscle_location_decode (char const *key)
+{
+ location loc;
+ char const *value = muscle_find_const (key);
+ aver (value);
+ aver (*value == '[');
+ aver (*++value == '[');
+ while (*++value)
+ switch (*value)
+ {
+ case '$':
+ aver (*++value == ']');
+ aver (*++value == '[');
+ obstack_sgrow (&muscle_obstack, "$");
+ break;
+ case '@':
+ switch (*++value)
+ {
+ case '@': obstack_sgrow (&muscle_obstack, "@" ); break;
+ case '{': obstack_sgrow (&muscle_obstack, "[" ); break;
+ case '}': obstack_sgrow (&muscle_obstack, "]" ); break;
+ default: aver (false); break;
+ }
+ break;
+ case '[':
+ aver (false);
+ break;
+ case ']':
+ {
+ char *boundary_str;
+ aver (*++value == ']');
+ obstack_1grow (&muscle_obstack, '\0');
+ boundary_str = obstack_finish (&muscle_obstack);
+ switch (*++value)
+ {
+ case ',':
+ boundary_set_from_string (&loc.start, boundary_str);
+ obstack_free (&muscle_obstack, boundary_str);
+ aver (*++value == ' ');
+ aver (*++value == '[');
+ aver (*++value == '[');
+ break;
+ case '\0':
+ boundary_set_from_string (&loc.end, boundary_str);
+ obstack_free (&muscle_obstack, boundary_str);
+ return loc;
+ break;
+ default:
+ aver (false);
+ break;
+ }
+ }
+ break;
+ default:
+ obstack_1grow (&muscle_obstack, *value);
+ break;
+ }
+ aver (false);
+ return loc;
+}
+
+void
+muscle_user_name_list_grow (char const *key, char const *user_name,
+ location loc)
+{
+ muscle_grow (key, "[[[[", ",");
+ muscle_grow (key, user_name, "");
+ muscle_grow (key, "]], ", "");
+ muscle_location_grow (key, loc);
+ muscle_grow (key, "]]", "");
+}
+
+#define MUSCLE_USER_NAME_CONVERT(NAME, PREFIX, USER_NAME, SUFFIX) \
+do { \
+ char *tmp; \
+ size_t length = strlen ((USER_NAME)); \
+ tmp = xmalloc (sizeof (PREFIX) - 1 + length + sizeof (SUFFIX)); \
+ strcpy (tmp, (PREFIX)); \
+ strcpy (tmp + sizeof (PREFIX) - 1, (USER_NAME)); \
+ strcpy (tmp + sizeof (PREFIX) - 1 + length, (SUFFIX)); \
+ (NAME) = uniqstr_new (tmp); \
+ free (tmp); \
+} while (0)
+
+void
+muscle_percent_define_insert (char const *variable, location variable_loc,
+ char const *value)
+{
+ char const *name;
+ char const *loc_name;
+
+ MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")");
+ MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")");
+
+ if (muscle_find_const (name))
+ {
+ warn_at (variable_loc, _("%s `%s' redefined"),
+ "%define variable", variable);
+ warn_at (muscle_location_decode (loc_name), _("previous definition"));
+ }
+ MUSCLE_INSERT_STRING (name, value);
+
+ muscle_insert (loc_name, "");
+ muscle_location_grow (loc_name, variable_loc);
+ muscle_user_name_list_grow ("percent_define_user_variables", variable,
+ variable_loc);
+}
+
+bool
+muscle_percent_define_flag_if (char const *variable)
+{
+ char const *name;
+ char const *loc_name;
+ char const *usage_name;
+ char const *value;
+ bool result = false;
+
+ MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")");
+ MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")");
+ MUSCLE_USER_NAME_CONVERT (usage_name, "percent_define_bison_variables(",
+ variable, ")");
+
+ value = muscle_find_const (name);
+ if (value)
+ {
+ if (value[0] == '\0' || 0 == strcmp (value, "true"))
+ result = true;
+ else if (0 == strcmp (value, "false"))
+ result = false;
+ else if (!muscle_find_const (usage_name))
+ complain_at(muscle_location_decode (loc_name),
+ _("invalid value for %%define boolean variable `%s'"),
+ variable);
+ }
+ else
+ fatal(_("undefined %%define variable `%s' passed to muscle_percent_define_flag_if"),
+ variable);
+
+ muscle_insert (usage_name, "");
+
+ return result;
+}
+
+void
+muscle_percent_define_default (char const *variable, char const *value)
+{
+ char const *name;
+ char const *loc_name;
+ MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")");
+ MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")");
+ if (!muscle_find_const (name))
+ {
+ location loc;
+ MUSCLE_INSERT_STRING (name, value);
+ loc.start.file = loc.end.file = "[Bison:muscle_percent_define_default]";
+ loc.start.line = loc.start.column = 0;
+ loc.end.line = loc.end.column = 0;
+ muscle_insert (loc_name, "");
+ muscle_location_grow (loc_name, loc);
+ }
+}
+
+void
+muscle_percent_code_grow (char const *qualifier, location qualifier_loc,
+ char const *code, location code_loc)
+{
+ char const *name;
+ MUSCLE_USER_NAME_CONVERT (name, "percent_code(", qualifier, ")");
+ muscle_code_grow (name, code, code_loc);
+ muscle_user_name_list_grow ("percent_code_user_qualifiers", qualifier,
+ qualifier_loc);
}
projects / bison.git / blobdiff