+/*
+ * Helper functions for outputting text.
+ * Copyright © 2011, 2021, 2023 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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 "output.h"
+#include <assert.h>
-size_t cdecl__advance_(char **buf, size_t *n, size_t amount)
+#include "cdecl.h"
+#include "cdecl-internal.h"
+
+#include "parse.h"
+#include "specstr.h"
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+size_t cdecl__advance(struct output_state *dst, size_t amount)
{
- if (amount >= *n) {
- *n = 0;
- *buf = 0;
- } else {
- *buf += amount;
- *n -= amount;
- }
+ size_t x = MIN(amount, dst->dstlen);
+
+ dst->dst += x;
+ dst->dstlen -= x;
+ dst->accum += amount;
return amount;
}
-size_t cdecl__advance(char **buf, size_t *n, size_t amount)
+static size_t cdecl__strlcpy(char *dst, const char *src, size_t dstlen)
+{
+ if (dst)
+ snprintf(dst, dstlen, "%s", src);
+ return strlen(src);
+}
+
+size_t cdecl__emit(struct output_state *dst, const char *src)
+{
+ size_t rc = cdecl__strlcpy(dst->dst, src, dst->dstlen);
+ return cdecl__advance(dst, rc);
+}
+
+static void explain_spec(struct output_state *dst, struct cdecl_declspec *s)
{
- size_t ret, rc;
+ size_t rc;
+
+ rc = cdecl__emit(dst, spec_string(s->type));
+ if (s->ident) {
+ cdecl__emit(dst, " " + !rc);
+ cdecl__emit(dst, s->ident);
+ }
+}
- if (!amount)
- return 0;
+/*
+ * Render a list of declaration specifiers. Only the declaration specifiers
+ * listed in mask, which is the bitwise OR of the desired specifier kinds, are
+ * printed.
+ */
+const char *cdecl__emit_specs(struct output_state *dst,
+ struct cdecl_declspec *s,
+ unsigned mask)
+{
+ const char *sep = " ";
+ int empty = 1;
+
+ for (; s; s = s->next) {
+ if (!(s->type & mask))
+ continue;
+
+ cdecl__emit(dst, sep + empty);
+ explain_spec(dst, s);
+ empty = 0;
+ }
- ret = cdecl__advance_(buf, n, amount);
- rc = snprintf(*buf, *n, " ");
- return ret + cdecl__advance_(buf, n, rc);
+ return sep + empty;
}