Make is_abstract a proper library function.

[cdecl99.git] / src / parse-decl.c

diff --git a/src/parse-decl.c b/src/parse-decl.c
index bce0afe186644d5f8968630ef830cbdf362f11e1..5c8e6845afad1777f3f97f8e5876387fa19ae2dd 100644 (file)
--- a/src/parse-decl.c
+++ b/src/parse-decl.c
@@ -15,6 +15,7 @@
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include <config.h>
 #include <stdio.h>
 #include <assert.h>
 #include <stdbool.h>
@@ -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;
 
@@ -347,6 +338,27 @@ 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;
+}
+
 /*
  * Traverse the parse tree, calling a function on every declarator in a
  * depth-first preorder traversal.  The function is given a pointer to the
@@ -386,24 +398,36 @@ 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;
 
-       rc = yylex_init(&scanner);
+       cdecl__init_i18n();
+
+       rc = cdecl__yylex_init(&scanner);
        if (rc != 0)
                return NULL;
 
-       state = yy_scan_string(declstr, scanner);
-       rc = yyparse(scanner, &decl);
-       yy_delete_buffer(state, scanner);
-       yylex_destroy(scanner);
+       state = cdecl__yy_scan_string(declstr, scanner);
+       rc = cdecl__yyparse(scanner, &decl);
+       cdecl__yy_delete_buffer(state, scanner);
+       cdecl__yylex_destroy(scanner);
 
        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 +438,14 @@ 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 (!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;
                }
@@ -426,6 +453,54 @@ struct cdecl *cdecl_parse_decl(const char *declstr)
 
        return decl;
 err:
-       cdecl_free(decl);
+       cdecl__free(decl);
+       return NULL;
+}
+
+struct cdecl *cdecl_parse_english(const char *english)
+{
+       YY_BUFFER_STATE state;
+       yyscan_t scanner;
+       struct cdecl *decl;
+       int rc;
+
+       cdecl__init_i18n();
+
+       rc = cdecl__yylex_init_extra(true, &scanner);
+       if (rc != 0)
+               return NULL;
+
+       state = cdecl__yy_scan_string(english, scanner);
+       rc = cdecl__yyparse(scanner, &decl);
+       cdecl__yy_delete_buffer(state, scanner);
+       cdecl__yylex_destroy(scanner);
+
+       if (rc != 0)
+               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 (!valid_declspecs(i, true))
+                       goto err;
+       }
+
+       return decl;
+err:
+       cdecl__free(decl);
        return NULL;
 }
+
+void cdecl_free(struct cdecl *decl)
+{
+       cdecl__free(decl);
+}