/*
* Render C declarations.
- * Copyright © 2011 Nick Bowler
+ * Copyright © 2011, 2021, 2023-2024 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
* 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>
#include "cdecl.h"
-#include "output.h"
-
-static size_t declare_specs(char *buf, size_t n, struct cdecl_declspec *s)
-{
- size_t ret = 0, rc;
-
- if (!s)
- return 0;
-
- rc = cdecl__explain_pre_specs(buf, n, s);
- ret += cdecl__advance(&buf, &n, rc);
+#include "cdecl-internal.h"
- rc = cdecl__explain_post_specs(buf, n, s);
- return ret + rc;
-}
-
-static size_t
-declare_declarator(char *buf, size_t n, struct cdecl_declarator *d);
+static void
+declare_declarator(struct output_state *dst, struct cdecl_declarator *d);
-static size_t declare_decl(char *buf, size_t n, struct cdecl *decl)
+static void declare_decl(struct output_state *dst, struct cdecl *decl)
{
- size_t ret = 0, rc;
+ struct cdecl_declarator *d = decl->declarators;
+ const char *sep;
- rc = declare_specs(buf, n, decl->specifiers);
- if (decl->declarators->type != CDECL_DECL_NULL)
- ret += cdecl__advance(&buf, &n, rc);
- else
- ret += cdecl__advance_(&buf, &n, rc);
+ sep = cdecl__emit_specs(dst, decl->specifiers, -1);
+ if (d->type != CDECL_DECL_NULL)
+ cdecl__emit(dst, sep);
- return ret + declare_declarator(buf, n, decl->declarators);
+ declare_declarator(dst, d);
}
-static size_t
-declare_postfix_child(char *buf, size_t n, struct cdecl_declarator *d)
+static void
+declare_postfix_child(struct output_state *dst, struct cdecl_declarator *d)
{
- size_t ret = 0, rc;
-
- if (d->type == CDECL_DECL_POINTER) {
- rc = snprintf(buf, n, "(");
- ret += cdecl__advance_(&buf, &n, rc);
- }
-
- rc = declare_declarator(buf, n, d);
- ret += cdecl__advance_(&buf, &n, rc);
+ bool need_parens = (d->type == CDECL_DECL_POINTER);
- if (d->type == CDECL_DECL_POINTER) {
- rc = snprintf(buf, n, ")");
- ret += cdecl__advance_(&buf, &n, rc);
- }
-
- return ret;
+ if (need_parens) cdecl__emit(dst, "(");
+ declare_declarator(dst, d);
+ if (need_parens) cdecl__emit(dst, ")");
}
-static size_t declare_pointer(char *buf, size_t n, struct cdecl_pointer *p)
+static void declare_pointer(struct output_state *dst, struct cdecl_declarator *d)
{
- size_t ret = 0, rc;
+ struct cdecl_declspec *q = d->u.pointer.qualifiers;
- rc = snprintf(buf, n, "*");
- if (p->qualifiers)
- ret += cdecl__advance(&buf, &n, rc);
- else
- ret += cdecl__advance_(&buf, &n, rc);
+ if (q) {
+ const char *sep;
- rc = cdecl__explain_specs(buf, n, p->qualifiers, CDECL_SPEC_QUAL);
- return ret + cdecl__advance(&buf, &n, rc);
+ cdecl__emit(dst, "* ");
+ sep = cdecl__emit_specs(dst, q, -1);
+ if (d->child->type != CDECL_DECL_NULL)
+ cdecl__emit(dst, sep);
+ } else {
+ cdecl__emit(dst, "*");
+ }
}
-static size_t declare_array(char *buf, size_t n, struct cdecl_array *a)
+static void declare_array(struct output_state *dst, struct cdecl_array *a)
{
- size_t ret = 0, rc;
+ cdecl__emit(dst, "[");
- rc = snprintf(buf, n, "[");
- ret += cdecl__advance_(&buf, &n, rc);
-
- if (a->vla)
- rc = snprintf(buf, n, "%s", a->vla[0] ? a->vla : "*");
- else
- rc = snprintf(buf, n, "%.0ju", a->length);
- ret += cdecl__advance_(&buf, &n, rc);
+ if (a->vla) {
+ const char *s = a->vla[0] ? a->vla : "*";
+ cdecl__emit(dst, s);
+ } else {
+ cdecl__emit_uint(dst, a->length);
+ }
- return ret + snprintf(buf, n, "]");
+ cdecl__emit(dst, "]");
}
-static size_t declare_function(char *buf, size_t n, struct cdecl_function *f)
+static void
+declare_function(struct output_state *dst, struct cdecl_function *f)
{
- size_t ret = 0, rc;
+ struct cdecl *p;
- rc = snprintf(buf, n, "(");
- ret += cdecl__advance_(&buf, &n, rc);
+ cdecl__emit(dst, "(");
- for (struct cdecl *p = f->parameters; p; p = p->next) {
- rc = declare_decl(buf, n, p);
- ret += cdecl__advance_(&buf, &n, rc);
+ for (p = f->parameters; p; p = p->next) {
+ declare_decl(dst, p);
- rc = 0;
if (p->next)
- rc = snprintf(buf, n, ", ");
+ cdecl__emit(dst, ", ");
else if (f->variadic)
- rc = snprintf(buf, n, ", ...");
- ret += cdecl__advance_(&buf, &n, rc);
+ cdecl__emit(dst, ", ...");
}
- return ret + snprintf(buf, n, ")");
+ cdecl__emit(dst, ")");
}
-static size_t
-declare_declarator(char *buf, size_t n, struct cdecl_declarator *d)
+static void
+declare_declarator(struct output_state *dst, struct cdecl_declarator *d)
{
- size_t ret = 0, rc;
-
for (; d; d = d->child) {
switch (d->type) {
case CDECL_DECL_NULL:
break;
case CDECL_DECL_IDENT:
- rc = snprintf(buf, n, "%s", d->u.ident);
- ret += cdecl__advance_(&buf, &n, rc);
+ cdecl__emit(dst, d->u.ident);
break;
case CDECL_DECL_POINTER:
- rc = declare_pointer(buf, n, &d->u.pointer);
- ret += cdecl__advance_(&buf, &n, rc);
+ declare_pointer(dst, d);
break;
/*
* Arrays and functions are special: since they are postfix,
* "bodies".
*/
case CDECL_DECL_ARRAY:
- rc = declare_postfix_child(buf, n, d->child);
- ret += cdecl__advance_(&buf, &n, rc);
- return ret + declare_array(buf, n, &d->u.array);
+ declare_postfix_child(dst, d->child);
+ declare_array(dst, &d->u.array);
+ return;
case CDECL_DECL_FUNCTION:
- rc = declare_postfix_child(buf, n, d->child);
- ret += cdecl__advance_(&buf, &n, rc);
- return ret + declare_function(buf, n, &d->u.function);
- default:
- assert(0);
+ declare_postfix_child(dst, d->child);
+ declare_function(dst, &d->u.function);
+ return;
}
}
-
- return ret;
}
size_t cdecl_declare(char *buf, size_t n, struct cdecl *decl)
{
- return declare_decl(buf, n, decl);
+ struct output_state dst = { buf, n };
+
+ declare_decl(&dst, decl);
+
+ return dst.accum;
}
projects / cdecl99.git / blobdiff