static const cpp_token *get__Pragma_string (cpp_reader *);
static void destringize_and_run (cpp_reader *, const cpp_string *,
source_location);
-static int parse_answer (cpp_reader *, struct answer **, int, source_location);
-static cpp_hashnode *parse_assertion (cpp_reader *, struct answer **, int);
-static struct answer ** find_answer (cpp_hashnode *, const struct answer *);
+static bool parse_answer (cpp_reader *, int, source_location, cpp_macro **);
+static cpp_hashnode *parse_assertion (cpp_reader *, int, cpp_macro **);
+static cpp_macro **find_answer (cpp_hashnode *, const cpp_macro *);
static void handle_assertion (cpp_reader *, const char *, int);
static void do_pragma_push_macro (cpp_reader *);
static void do_pragma_pop_macro (cpp_reader *);
storage, i.e. the #assert case. Returns 0 on success, and sets
ANSWERP to point to the answer. PRED_LOC is the location of the
predicate. */
-static int
-parse_answer (cpp_reader *pfile, struct answer **answerp, int type,
- source_location pred_loc)
+static bool
+parse_answer (cpp_reader *pfile, int type, source_location pred_loc,
+ cpp_macro **answer_ptr)
{
- const cpp_token *paren;
- struct answer *answer;
- unsigned int acount;
-
/* In a conditional, it is legal to not have an open paren. We
should save the following token in this case. */
- paren = cpp_get_token (pfile);
+ const cpp_token *paren = cpp_get_token (pfile);
/* If not a paren, see if we're OK. */
if (paren->type != CPP_OPEN_PAREN)
if (type == T_IF)
{
_cpp_backup_tokens (pfile, 1);
- return 0;
+ return true;
}
/* #unassert with no answer is valid - it removes all answers. */
if (type == T_UNASSERT && paren->type == CPP_EOF)
- return 0;
+ return true;
cpp_error_with_line (pfile, CPP_DL_ERROR, pred_loc, 0,
"missing '(' after predicate");
- return 1;
+ return false;
}
- for (acount = 0;; acount++)
+ cpp_macro *answer = _cpp_new_macro (pfile, cmk_assert,
+ _cpp_reserve_room (pfile, 0,
+ sizeof (cpp_macro)));
+ answer->parm.next = NULL;
+ unsigned count = 0;
+ for (;;)
{
- size_t room_needed;
const cpp_token *token = cpp_get_token (pfile);
- cpp_token *dest;
if (token->type == CPP_CLOSE_PAREN)
break;
if (token->type == CPP_EOF)
{
cpp_error (pfile, CPP_DL_ERROR, "missing ')' to complete answer");
- return 1;
+ return false;
}
- /* struct answer includes the space for one token. */
- room_needed = (sizeof (struct answer) + acount * sizeof (cpp_token));
-
- if (BUFF_ROOM (pfile->a_buff) < room_needed)
- _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (struct answer));
-
- dest = &((struct answer *) BUFF_FRONT (pfile->a_buff))->first[acount];
- *dest = *token;
-
- /* Drop whitespace at start, for answer equivalence purposes. */
- if (acount == 0)
- dest->flags &= ~PREV_WHITE;
+ answer = (cpp_macro *)_cpp_reserve_room
+ (pfile, sizeof (cpp_macro) + count * sizeof (cpp_token),
+ sizeof (cpp_token));
+ answer->exp.tokens[count++] = *token;
}
- if (acount == 0)
+ if (!count)
{
cpp_error (pfile, CPP_DL_ERROR, "predicate's answer is empty");
- return 1;
+ return false;
}
- answer = (struct answer *) BUFF_FRONT (pfile->a_buff);
- answer->count = acount;
- answer->next = NULL;
- *answerp = answer;
+ /* Drop whitespace at start, for answer equivalence purposes. */
+ answer->exp.tokens[0].flags &= ~PREV_WHITE;
- return 0;
+ answer->count = count;
+ *answer_ptr = answer;
+
+ return true;
}
/* Parses an assertion directive of type TYPE, returning a pointer to
the hash node of the predicate, or 0 on error. If an answer was
- supplied, it is placed in ANSWERP, otherwise it is set to 0. */
+ supplied, it is placed in EXP_PTR & EXP_COUNT, which is otherwise
+ set to 0. */
static cpp_hashnode *
-parse_assertion (cpp_reader *pfile, struct answer **answerp, int type)
+parse_assertion (cpp_reader *pfile, int type, cpp_macro **answer_ptr)
{
cpp_hashnode *result = 0;
- const cpp_token *predicate;
/* We don't expand predicates or answers. */
pfile->state.prevent_expansion++;
- *answerp = 0;
- predicate = cpp_get_token (pfile);
+ *answer_ptr = NULL;
+
+ const cpp_token *predicate = cpp_get_token (pfile);
if (predicate->type == CPP_EOF)
cpp_error (pfile, CPP_DL_ERROR, "assertion without predicate");
else if (predicate->type != CPP_NAME)
cpp_error_with_line (pfile, CPP_DL_ERROR, predicate->src_loc, 0,
"predicate must be an identifier");
- else if (parse_answer (pfile, answerp, type, predicate->src_loc) == 0)
+ else if (parse_answer (pfile, type, predicate->src_loc, answer_ptr))
{
unsigned int len = NODE_LEN (predicate->val.node.node);
unsigned char *sym = (unsigned char *) alloca (len + 1);
}
pfile->state.prevent_expansion--;
+
return result;
}
/* Returns a pointer to the pointer to CANDIDATE in the answer chain,
or a pointer to NULL if the answer is not in the chain. */
-static struct answer **
-find_answer (cpp_hashnode *node, const struct answer *candidate)
+static cpp_macro **
+find_answer (cpp_hashnode *node, const cpp_macro *candidate)
{
unsigned int i;
- struct answer **result;
+ cpp_macro **result = NULL;
- for (result = &node->value.answers; *result; result = &(*result)->next)
+ for (result = &node->value.answers; *result; result = &(*result)->parm.next)
{
- struct answer *answer = *result;
+ cpp_macro *answer = *result;
if (answer->count == candidate->count)
{
for (i = 0; i < answer->count; i++)
- if (! _cpp_equiv_tokens (&answer->first[i], &candidate->first[i]))
+ if (!_cpp_equiv_tokens (&answer->exp.tokens[i],
+ &candidate->exp.tokens[i]))
break;
if (i == answer->count)
int
_cpp_test_assertion (cpp_reader *pfile, unsigned int *value)
{
- struct answer *answer;
- cpp_hashnode *node;
-
- node = parse_assertion (pfile, &answer, T_IF);
+ cpp_macro *answer;
+ cpp_hashnode *node = parse_assertion (pfile, T_IF, &answer);
/* For recovery, an erroneous assertion expression is handled as a
failing assertion. */
*value = 0;
if (node)
- *value = (node->type == NT_ASSERTION &&
- (answer == 0 || *find_answer (node, answer) != 0));
+ {
+ if (node->type == NT_ASSERTION)
+ *value = !answer || *find_answer (node, answer);
+ }
else if (pfile->cur_token[-1].type == CPP_EOF)
_cpp_backup_tokens (pfile, 1);
static void
do_assert (cpp_reader *pfile)
{
- struct answer *new_answer;
- cpp_hashnode *node;
+ cpp_macro *answer;
+ cpp_hashnode *node = parse_assertion (pfile, T_ASSERT, &answer);
- node = parse_assertion (pfile, &new_answer, T_ASSERT);
if (node)
{
- size_t answer_size;
-
/* Place the new answer in the answer list. First check there
is not a duplicate. */
- new_answer->next = 0;
- if (node->type == NT_ASSERTION)
+ if (node->type == NT_ASSERTION && *find_answer (node, answer))
{
- if (*find_answer (node, new_answer))
- {
- cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted",
- NODE_NAME (node) + 1);
- return;
- }
- new_answer->next = node->value.answers;
+ cpp_error (pfile, CPP_DL_WARNING, "\"%s\" re-asserted",
+ NODE_NAME (node) + 1);
+ return;
}
- answer_size = sizeof (struct answer) + ((new_answer->count - 1)
- * sizeof (cpp_token));
- /* Commit or allocate storage for the object. */
- if (pfile->hash_table->alloc_subobject)
- {
- struct answer *temp_answer = new_answer;
- new_answer = (struct answer *) pfile->hash_table->alloc_subobject
- (answer_size);
- memcpy (new_answer, temp_answer, answer_size);
- }
- else
- BUFF_FRONT (pfile->a_buff) += answer_size;
+ /* Commit or allocate storage for the answer. */
+ answer = (cpp_macro *)_cpp_commit_buff
+ (pfile, sizeof (cpp_macro) - sizeof (cpp_token)
+ + sizeof (cpp_token) * answer->count);
+
+ if (node->type == NT_ASSERTION)
+ answer->parm.next = node->value.answers;
node->type = NT_ASSERTION;
- node->value.answers = new_answer;
+ node->value.answers = answer;
+
check_eol (pfile, false);
}
}
static void
do_unassert (cpp_reader *pfile)
{
- cpp_hashnode *node;
- struct answer *answer;
+ cpp_macro *answer;
+ cpp_hashnode *node = parse_assertion (pfile, T_UNASSERT, &answer);
- node = parse_assertion (pfile, &answer, T_UNASSERT);
/* It isn't an error to #unassert something that isn't asserted. */
if (node && node->type == NT_ASSERTION)
{
if (answer)
{
- struct answer **p = find_answer (node, answer), *temp;
-
- /* Remove the answer from the list. */
- temp = *p;
- if (temp)
- *p = temp->next;
+ cpp_macro **p = find_answer (node, answer);
- /* Did we free the last answer? */
- if (node->value.answers == 0)
- node->type = NT_VOID;
+ /* Remove the assert from the list. */
+ if (cpp_macro *temp = *p)
+ {
+ *p = temp->parm.next;
+ /* Did we free the last answer? */
+ if (!*p)
+ node->type = NT_VOID;
+ }
check_eol (pfile, false);
}
typedef struct cpp_callbacks cpp_callbacks;
typedef struct cpp_dir cpp_dir;
-struct answer;
struct _cpp_file;
/* The first three groups, apart from '=', can appear in preprocessor
/* The kind of the cpp_macro. */
enum cpp_macro_kind {
cmk_macro, /* An ISO macro (token expansion). */
+ cmk_assert, /* An assertion. */
cmk_traditional, /* A traditional macro (text expansion). */
};
/* Each macro definition is recorded in a cpp_macro structure.
Variadic macros cannot occur with traditional cpp. */
struct GTY(()) cpp_macro {
- /* Parameters, if any. If parameter names use extended identifiers,
- the original spelling of those identifiers, not the canonical
- UTF-8 spelling, goes here. */
- cpp_hashnode ** GTY ((nested_ptr (union tree_node,
- "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
- "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
- length ("%h.paramc")))
- params;
+ union cpp_parm_u
+ {
+ /* Parameters, if any. If parameter names use extended identifiers,
+ the original spelling of those identifiers, not the canonical
+ UTF-8 spelling, goes here. */
+ cpp_hashnode ** GTY ((tag ("false"),
+ nested_ptr (union tree_node,
+ "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
+ "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
+ length ("%1.paramc"))) params;
+
+ /* If this is an assertion, the next one in the chain. */
+ cpp_macro *GTY ((tag ("true"))) next;
+ } GTY ((desc ("%1.kind == cmk_assert"))) parm;
/* Definition line number. */
source_location line;
- /* Number of tokens in expansion, or bytes for traditional macros. */
+ /* Number of tokens in body, or bytes for traditional macros. */
+ /* Do we really need 2^32-1 range here? */
unsigned int count;
/* Number of parameters. */
/* If a macro. */
cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
/* Answers to an assertion. */
- struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
+ cpp_macro * GTY ((tag ("NTV_ANSWER"))) answers;
/* Code for a builtin macro. */
enum cpp_builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
/* Macro argument index. */
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