1 files changed, 77 insertions, 0 deletions
diff --git a/src/cmd/gc/mkbuiltin1.c b/src/cmd/gc/mkbuiltin1.c
new file mode 100644
index 000000000..22ef468f3
--- /dev/null
+++ b/src/cmd/gc/mkbuiltin1.c
@@ -0,0 +1,77 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Compile .go file, import data from .6 file, and generate C string version.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+int
+main(int argc, char **argv)
+{
+	char *name;
+	FILE *fin;
+	char buf[1024], initfunc[1024], *p, *q;
+
+	if(argc != 2) {
+		fprintf(stderr, "usage: mkbuiltin1 sys\n");
+		fprintf(stderr, "in file $1.6 s/PACKAGE/$1/\n");
+		exit(1);
+	}
+
+	name = argv[1];
+	snprintf(initfunc, sizeof(initfunc), "init_%s_function", name);
+
+	snprintf(buf, sizeof(buf), "%s.6", name);
+	if((fin = fopen(buf, "r")) == NULL) {
+		fprintf(stderr, "open %s: %s\n", buf, strerror(errno));
+		exit(1);
+	}
+
+	// look for $$ that introduces imports
+	while(fgets(buf, sizeof buf, fin) != NULL)
+		if(strstr(buf, "$$"))
+			goto begin;
+	fprintf(stderr, "did not find beginning of imports\n");
+	exit(1);
+
+begin:
+	printf("char *%simport =\n", name);
+
+	// process imports, stopping at $$ that closes them
+	while(fgets(buf, sizeof buf, fin) != NULL) {
+		buf[strlen(buf)-1] = 0;	// chop \n
+		if(strstr(buf, "$$"))
+			goto end;
+
+		// chop leading white space
+		for(p=buf; *p==' ' || *p == '\t'; p++)
+			;
+
+		// cut out decl of init_$1_function - it doesn't exist
+		if(strstr(buf, initfunc))
+			continue;
+
+		// sys.go claims to be in package PACKAGE to avoid
+		// conflicts during "6g sys.go".  rename PACKAGE to $2.
+		printf("\t\"");
+		while(q = strstr(p, "PACKAGE")) {
+			*q = 0;
+			printf("%s", p);	// up to the substitution
+			printf("%s", name);	// the sub name
+			p = q+7;		// continue with rest
+		}
+
+		printf("%s\\n\"\n", p);
+	}
+	fprintf(stderr, "did not find end of imports\n");
+	exit(1);
+
+end:
+	printf("\t\"$$\\n\";\n");
+	return 0;
+}