2 * Render C declarations.
3 * Copyright © 2011, 2021, 2023-2024 Nick Bowler
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "cdecl-internal.h"
28 declare_declarator(struct output_state *dst, struct cdecl_declarator *d);
30 static void declare_decl(struct output_state *dst, struct cdecl *decl)
32 struct cdecl_declarator *d = decl->declarators;
35 sep = cdecl__emit_specs(dst, decl->specifiers, -1);
36 if (d->type != CDECL_DECL_NULL)
37 cdecl__emit(dst, sep);
39 declare_declarator(dst, d);
43 declare_postfix_child(struct output_state *dst, struct cdecl_declarator *d)
45 bool need_parens = (d->type == CDECL_DECL_POINTER);
47 if (need_parens) cdecl__emit(dst, "(");
48 declare_declarator(dst, d);
49 if (need_parens) cdecl__emit(dst, ")");
52 static void declare_pointer(struct output_state *dst, struct cdecl_declarator *d)
54 struct cdecl_declspec *q = d->u.pointer.qualifiers;
59 cdecl__emit(dst, "* ");
60 sep = cdecl__emit_specs(dst, q, -1);
61 if (d->child->type != CDECL_DECL_NULL)
62 cdecl__emit(dst, sep);
64 cdecl__emit(dst, "*");
68 static void declare_array(struct output_state *dst, struct cdecl_array *a)
70 cdecl__emit(dst, "[");
73 const char *s = a->vla[0] ? a->vla : "*";
76 cdecl__emit_uint(dst, a->length);
79 cdecl__emit(dst, "]");
83 declare_function(struct output_state *dst, struct cdecl_function *f)
87 cdecl__emit(dst, "(");
89 for (p = f->parameters; p; p = p->next) {
93 cdecl__emit(dst, ", ");
95 cdecl__emit(dst, ", ...");
98 cdecl__emit(dst, ")");
102 declare_declarator(struct output_state *dst, struct cdecl_declarator *d)
104 for (; d; d = d->child) {
106 case CDECL_DECL_NULL:
108 case CDECL_DECL_IDENT:
109 cdecl__emit(dst, d->u.ident);
111 case CDECL_DECL_POINTER:
112 declare_pointer(dst, d);
115 * Arrays and functions are special: since they are postfix,
116 * we need to render the children before rendering their
119 case CDECL_DECL_ARRAY:
120 declare_postfix_child(dst, d->child);
121 declare_array(dst, &d->u.array);
123 case CDECL_DECL_FUNCTION:
124 declare_postfix_child(dst, d->child);
125 declare_function(dst, &d->u.function);
133 size_t cdecl_declare(char *buf, size_t n, struct cdecl *decl)
135 struct output_state dst = { buf, n };
137 declare_decl(&dst, decl);