lexer: Make a lexer for our config file format

This lexer will be used in our PKCS#11 persistence format as well.

https://bugs.freedesktop.org/show_bug.cgi?id=62156

1 files changed, 84 insertions, 0 deletions

diff --git a/common/lexer.h b/common/lexer.h
new file mode 100644
index 0000000..9daf296
--- /dev/null
+++ b/common/lexer.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2005 Stefan Walter
+ * Copyright (c) 2011 Collabora Ltd.
+ * Copyright (c) 2013 Red Hat Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *     * Redistributions of source code must retain the above
+ *       copyright notice, this list of conditions and the
+ *       following disclaimer.
+ *     * Redistributions in binary form must reproduce the
+ *       above copyright notice, this list of conditions and
+ *       the following disclaimer in the documentation and/or
+ *       other materials provided with the distribution.
+ *     * The names of contributors to this software may not be
+ *       used to endorse or promote products derived from this
+ *       software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * Author: Stef Walter <stefw@redhat.com>
+ */
+
+#ifndef P11_LEXER_H__
+#define P11_LEXER_H__
+
+#include "compat.h"
+
+enum {
+	TOK_EOF = 0,
+	TOK_SECTION = 1,
+	TOK_FIELD,
+	TOK_PEM,
+};
+
+typedef struct {
+	char *filename;
+	const char *at;
+	int remaining;
+	int complained;
+
+	int tok_type;
+	union {
+		struct {
+			char *name;
+		} section;
+		struct {
+			char *name;
+			char *value;
+		} field;
+		struct {
+			const char *begin;
+			size_t length;
+		} pem;
+	} tok;
+} p11_lexer;
+
+void             p11_lexer_init               (p11_lexer *lexer,
+                                               const char *filename,
+                                               const char *data,
+                                               size_t length);
+
+bool             p11_lexer_next               (p11_lexer *lexer,
+                                               bool *failed);
+
+void             p11_lexer_done               (p11_lexer *lexer);
+
+void             p11_lexer_msg                (p11_lexer *lexer,
+                                               const char *msg);
+
+#endif /* P11_LEXER_H__ */