X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/f64af1a757804cd18bd1731b4634e5752b9ca0ed..425ed781f7a27bc415e13a1901899e2c7b11e4c8:/src/parse-decl.c
diff --git a/src/parse-decl.c b/src/parse-decl.c
index 3ffb102..4489532 100644
--- a/src/parse-decl.c
+++ b/src/parse-decl.c
@@ -1,6 +1,6 @@
/*
* Parse and validate C declarations.
- * Copyright © 2011 Nick Bowler
+ * Copyright © 2011-2012 Nick Bowler
*
* 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
@@ -15,6 +15,7 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
+#include
#include
#include
#include
@@ -23,18 +24,8 @@
#include "typemap.h"
#include "parse.h"
#include "scan.h"
-
-/*
- * Determine if a declarator declares an identifier (other than a function
- * parameter).
- */
-static bool is_abstract(struct cdecl_declarator *d)
-{
- while (d->child)
- d = d->child;
-
- return d->type != CDECL_DECL_IDENT;
-}
+#include "i18n.h"
+#include "normalize.h"
/*
* Verify the declaration specifiers of a declaration. If top is true, treat
@@ -45,7 +36,7 @@ static bool valid_declspecs(struct cdecl *decl, bool top)
{
struct cdecl_declspec *specs = decl->specifiers;
struct cdecl_declarator *d = decl->declarators;
- bool abstract = is_abstract(d);
+ bool abstract = cdecl_is_abstract(d);
unsigned num_storage = 0;
unsigned long typemap;
@@ -292,21 +283,26 @@ check_parameters(struct cdecl_declarator **p, struct cdecl_declarator *d)
if (!valid_declspecs(param, false))
return -1;
+ /* Check for "void" function parameters as a special case. */
for (spec = param->specifiers; spec; spec = spec->next) {
- if (spec->type == CDECL_TYPE_VOID
- && param->declarators->type == CDECL_DECL_NULL)
- has_void = true;
+ if (param->declarators->type != CDECL_DECL_NULL)
+ continue;
+ if (spec->type != CDECL_TYPE_VOID)
+ continue;
+
+ if (spec != param->specifiers || spec->next != NULL) {
+ fprintf(stderr, "void parameter must not have extra specifiers\n");
+ return -1;
+ } else if (d->u.function.parameters->next) {
+ fprintf(stderr, "a void parameter must stand alone\n");
+ return -1;
+ } else if (d->u.function.variadic) {
+ fprintf(stderr, "variadic functions cannot have a void parameter\n");
+ return -1;
+ }
}
}
- if (has_void && d->u.function.parameters->next) {
- fprintf(stderr, "a void parameter must stand alone\n");
- return -1;
- } else if (has_void && d->u.function.variadic) {
- fprintf(stderr, "variadic functions cannot have a void parameter\n");
- return -1;
- }
-
return 0;
}
@@ -347,6 +343,48 @@ check_arrays(struct cdecl_declarator **p, struct cdecl_declarator *d)
return 0;
}
+static int
+normalize_specs(struct cdecl_declarator **p, struct cdecl_declarator *d)
+{
+ struct cdecl_function *func;
+ struct cdecl_pointer *ptr;
+
+ switch (d->type) {
+ case CDECL_DECL_POINTER:
+ ptr = &d->u.pointer;
+ ptr->qualifiers = cdecl__normalize_specs(ptr->qualifiers);
+ break;
+ case CDECL_DECL_FUNCTION:
+ func = &d->u.function;
+ for (struct cdecl *i = func->parameters; i; i = i->next)
+ i->specifiers = cdecl__normalize_specs(i->specifiers);
+ break;
+ }
+
+ return 0;
+}
+
+static int
+check_qualifiers(struct cdecl_declarator **p, struct cdecl_declarator *d)
+{
+ struct cdecl_declspec *spec;
+ struct cdecl_pointer *ptr;
+
+ if (!d->child || d->child->type != CDECL_DECL_POINTER)
+ return 0;
+
+ ptr = &d->child->u.pointer;
+ for (spec = ptr->qualifiers; spec; spec = spec->next) {
+ if (spec->type == CDECL_QUAL_RESTRICT
+ && d->type == CDECL_DECL_FUNCTION) {
+ fprintf(stderr, "function pointers cannot be restrict-qualified\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
/*
* Traverse the parse tree, calling a function on every declarator in a
* depth-first preorder traversal. The function is given a pointer to the
@@ -386,11 +424,14 @@ static bool forall_declarators(struct cdecl *decl,
struct cdecl *cdecl_parse_decl(const char *declstr)
{
+ struct cdecl_declspec *norm_specs;
YY_BUFFER_STATE state;
yyscan_t scanner;
struct cdecl *decl;
int rc;
+ cdecl__init_i18n();
+
rc = cdecl__yylex_init(&scanner);
if (rc != 0)
return NULL;
@@ -403,7 +444,16 @@ struct cdecl *cdecl_parse_decl(const char *declstr)
if (rc != 0)
return NULL;
+ /*
+ * Since the top-level specifiers are shared between each top-level
+ * declarator, we need to normalize them once and then propagate the
+ * new specifier list.
+ */
+ norm_specs = cdecl__normalize_specs(decl->specifiers);
+
for (struct cdecl *i = decl; i; i = i->next) {
+ i->specifiers = norm_specs;
+
if (!forall_declarators(i, reduce_parentheses))
goto err;
if (!forall_declarators(i, simplify_functions))
@@ -414,11 +464,16 @@ struct cdecl *cdecl_parse_decl(const char *declstr)
goto err;
if (!forall_declarators(i, check_arrays))
goto err;
+ if (!forall_declarators(i, normalize_specs))
+ goto err;
+ if (!forall_declarators(i, check_qualifiers))
+ goto err;
if (!valid_declspecs(i, true))
goto err;
- if (is_abstract(i->declarators) && (i != decl || i->next)) {
+ if (cdecl_is_abstract(i->declarators)
+ && (i != decl || i->next)) {
fprintf(stderr, "mixing type names and declarations is not allowed\n");
goto err;
}
@@ -426,7 +481,7 @@ struct cdecl *cdecl_parse_decl(const char *declstr)
return decl;
err:
- cdecl_free(decl);
+ cdecl__free(decl);
return NULL;
}
@@ -437,6 +492,8 @@ struct cdecl *cdecl_parse_english(const char *english)
struct cdecl *decl;
int rc;
+ cdecl__init_i18n();
+
rc = cdecl__yylex_init_extra(true, &scanner);
if (rc != 0)
return NULL;
@@ -450,12 +507,18 @@ struct cdecl *cdecl_parse_english(const char *english)
return NULL;
for (struct cdecl *i = decl; i; i = i->next) {
+ i->specifiers = cdecl__normalize_specs(i->specifiers);
+
if (!forall_declarators(i, check_parameters))
goto err;
if (!forall_declarators(i, check_rettypes))
goto err;
if (!forall_declarators(i, check_arrays))
goto err;
+ if (!forall_declarators(i, normalize_specs))
+ goto err;
+ if (!forall_declarators(i, check_qualifiers))
+ goto err;
if (!valid_declspecs(i, true))
goto err;
@@ -463,6 +526,11 @@ struct cdecl *cdecl_parse_english(const char *english)
return decl;
err:
- cdecl_free(decl);
+ cdecl__free(decl);
return NULL;
}
+
+void cdecl_free(struct cdecl *decl)
+{
+ cdecl__free(decl);
+}