Initial public snapshot

With code from Bill. Thanks Bill!

1 files changed, 95 insertions, 0 deletions

diff --git a/src/build/codegen.c b/src/build/codegen.c
new file mode 100644
index 0000000..c9be0ef
--- /dev/null
+++ b/src/build/codegen.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright © 2021 Michael Smith <mikesmiffy128@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../os.h"
+#include "cmeta.h"
+
+static const char *cmdnames[4096]; // arbitrary limit!
+static int ncmdnames = 0;
+static const char *varnames[4096]; // arbitrary limit!
+static int nvarnames = 0;
+
+static void die(const char *s) {
+	fprintf(stderr, "codegen: %s\n", s);
+	exit(100);
+}
+
+#define PUT(array, ent) do { \
+	if (n##array == sizeof(array) / sizeof(*array)) { \
+		fprintf(stderr, "codegen: out of space; make " #array " bigger!\n"); \
+		exit(1); \
+	} \
+	array[n##array++] = ent; \
+} while (0)
+
+static void oncondef(const char *name, bool isvar) {
+	if (isvar) PUT(varnames, name); else PUT(cmdnames, name);
+}
+
+#define _(x) \
+	if (fprintf(out, "%s\n", x) < 0) die("couldn't write to file");
+#define F(f, ...) \
+	if (fprintf(out, f "\n", __VA_ARGS__) < 0) die("couldn't write to file");
+#define H() \
+_( "/* This file is autogenerated by src/build/codegen.c. DO NOT EDIT! */") \
+_( "")
+
+int OS_MAIN(int argc, os_char *argv[]) {
+	for (++argv; *argv; ++argv) {
+		const struct cmeta *cm = cmeta_loadfile(*argv);
+		cmeta_conmacros(cm, &oncondef);
+	}
+
+	FILE *out = fopen(".build/include/cmdinit.gen.h", "wb");
+	if (!out) die("couldn't open cmdinit.gen.h");
+	H();
+	for (const char *const *pp = cmdnames;
+			pp - cmdnames < ncmdnames; ++pp) {
+F( "extern struct con_cmd *%s;", *pp)
+	}
+	for (const char *const *pp = varnames;
+			pp - varnames < nvarnames; ++pp) {
+F( "extern struct con_var *%s;", *pp)
+	}
+_( "")
+_( "static void regcmds(void (*VCALLCONV f)(void *, void *)) {")
+	for (const char *const *pp = cmdnames;
+			pp - cmdnames < ncmdnames; ++pp) {
+F( "	f(_con_iface, %s);", *pp)
+	}
+	for (const char *const *pp = varnames;
+			pp - varnames < nvarnames; ++pp) {
+F( "	initval(%s);", *pp)
+F( "	f(_con_iface, %s);", *pp)
+	}
+_( "}")
+_( "")
+_( "static void freevars(void) {")
+	for (const char *const *pp = varnames;
+			pp - varnames < nvarnames; ++pp) {
+F( "	extfree(%s->strval);", *pp)
+	}
+_( "}")
+	if (fflush(out) == EOF) die("couldn't fully write cmdinit.gen.h");
+
+	return 0;
+}
+
+// vi: sw=4 ts=4 noet tw=80 cc=80