X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/54ca2ed1ca173c7818792b6b06d12b8536acb6f3..8b40c60072c0549d18afb1e19fa28ee18036957c:/src/output.c

diff --git a/src/output.c b/src/output.c
index 8c2cd0b..f691765 100644
--- a/src/output.c
+++ b/src/output.c
@@ -1,5 +1,26 @@
+/*
+ *  Helper functions for outputting text.
+ *  Copyright © 2011, 2021 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>
+
+#include "cdecl.h"
+#include "cdecl-internal.h"
 
 size_t cdecl__advance_(char **buf, size_t *n, size_t amount)
 {
@@ -25,3 +46,52 @@ size_t cdecl__advance(char **buf, size_t *n, size_t amount)
 	rc = snprintf(*buf, *n, " ");
 	return ret + cdecl__advance_(buf, n, rc);
 }
+
+#include "specstr.h"
+
+static size_t explain_spec(char *buf, size_t n, struct cdecl_declspec *s)
+{
+	const char *keyword = spec_string(s->type);
+
+	if (keyword[0] && s->ident)
+		return snprintf(buf, n, "%s %s", keyword, s->ident);
+	else if (s->ident)
+		return snprintf(buf, n, "%s", s->ident);
+	return snprintf(buf, n, "%s", keyword);
+}
+
+/*
+ * 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.
+ */
+size_t cdecl__explain_specs(char *buf, size_t n, struct cdecl_declspec *s,
+                                                 unsigned mask)
+{
+	size_t ret = 0, rc = 0;
+
+	for (struct cdecl_declspec *c = s; c; c = c->next) {
+		switch (cdecl_spec_kind(c) & mask) {
+		case CDECL_SPEC_FUNC:
+		case CDECL_SPEC_STOR:
+		case CDECL_SPEC_QUAL:
+		case CDECL_SPEC_TYPE:
+			ret += cdecl__advance(&buf, &n, rc);
+			rc = explain_spec(buf, n, c);
+		}
+	}
+
+	return ret + rc;
+}
+
+/* Renders the storage-class and function specifiers in canonical form. */
+size_t cdecl__explain_pre_specs(char *buf, size_t n, struct cdecl_declspec *s)
+{
+	return cdecl__explain_specs(buf, n, s, CDECL_SPEC_FUNC|CDECL_SPEC_STOR);
+}
+
+/* Renders the type qualifiers and type specifiers in canonical form. */
+size_t cdecl__explain_post_specs(char *buf, size_t n, struct cdecl_declspec *s)
+{
+	return cdecl__explain_specs(buf, n, s, CDECL_SPEC_QUAL|CDECL_SPEC_TYPE);
+}