Initial revision

util/cpp/init.c

@@ -0,0 +1,72 @@
+/* PREPROCESSOR: INITIALIZATION ROUTINES */
+
+#include	<system.h>
+#include	<alloc.h>
+#include	"class.h"
+#include	"macro.h"
+#include	"idf.h"
+#include	"interface.h"
+
+PRIVATE struct mkey	{
+	char *mk_reserved;
+	int mk_key;
+} mkey[] =	{
+	{"define",	K_DEFINE},
+	{"elif",	K_ELIF},
+	{"else",	K_ELSE},
+	{"endif",	K_ENDIF},
+	{"if",		K_IF},
+	{"ifdef",	K_IFDEF},
+	{"ifndef",	K_IFNDEF},
+	{"include",	K_INCLUDE},
+	{"line",	K_LINE},
+	{"undef",	K_UNDEF},
+	{0,		K_UNKNOWN}
+};
+
+char *strcpy();
+
+EXPORT
+init_pp()
+{
+	long clock, sys_time();
+	static char date[30];
+	char *ctime();
+
+	/*	Initialise the control line keywords (if, include, define, etc)
+		Although the lexical analyzer treats them as identifiers, the
+		control line handler can recognize them as keywords by the
+		id_resmac field of the identifier.
+	*/
+	{
+		register struct mkey *mk = &mkey[0];
+
+		while (mk->mk_reserved)	{
+			struct idf *idf = str2idf(mk->mk_reserved, 0);
+			
+			if (idf->id_resmac)
+				fatal("maximum identifier length insufficient");
+			idf->id_resmac = mk->mk_key;
+			mk++;
+		}
+	}
+
+	/*	Initialize __DATE__, __FILE__ and __LINE__ macro
+		definitions.
+	*/
+	/* __DATE__	*/
+	clock = sys_time();
+	strcpy(&date[1], ctime(&clock));
+	date[26] = '\0';		/* zap nl	*/
+	date[0] = date[25] = '"';
+	macro_def(str2idf("__DATE__", 0), date, -1, 26, NOFLAG);
+
+	/* __LINE__	*/
+	macro_def(str2idf("__LINE__", 0), "0", -1, 1, FUNC);
+
+	/* __FILE__	*/
+	macro_def(str2idf("__FILE__", 0), "", -1, 1, FUNC);
+
+	/* defined(??) */
+	macro_def(str2idf("defined", 0), "", 1, 1, FUNC);
+}