From: yu.dongliang <18588496441@163.com>
Date: Wed, 19 Apr 2023 02:44:47 +0000 (+0800)
Subject: add usage info
X-Git-Url: http://baseworks.info/?a=commitdiff_plain;h=6cf2704d13cd586f2a6fa35a55a945c92dc5d464;p=scf.git

add usage info
---

diff --git a/parse/main.c b/parse/main.c
index 2ee3400..93e2c1a 100644
--- a/parse/main.c
+++ b/parse/main.c
@@ -31,11 +31,18 @@ void usage(char* path)
 {
 	fprintf(stderr, "Usage: %s [-c] [-a arch] [-o out] src0 [src1]\n\n", path);
 	fprintf(stderr, "-c: only compile, not link\n");
-	fprintf(stderr, "-a: select cpu arch (x64 or arm64), default is x64\n");
+	fprintf(stderr, "-a: select cpu arch (x64 or arm64 or naja), default is x64\n\n");
+	fprintf(stderr, "naja is a bytecode designed by me, so that a script language can be developed based on scf framework.\n");
+	fprintf(stderr, "naja is compiled & linked to ELF, and run by nvm in 'scf/vm' dir.\n");
 }
 
 int main(int argc, char* argv[])
 {
+	if (argc < 2) {
+		usage(argv[0]);
+		return -EINVAL;
+	}
+
 	scf_vector_t* afiles  = scf_vector_alloc();
 	scf_vector_t* sofiles = scf_vector_alloc();
 	scf_vector_t* srcs    = scf_vector_alloc();
diff --git a/vm/scf_vm_test.c b/vm/scf_vm_test.c
index 54eea6f..2136fa4 100644
--- a/vm/scf_vm_test.c
+++ b/vm/scf_vm_test.c
@@ -1,7 +1,13 @@
 #include"scf_vm.h"
 
-int main()
+int main(int argc, char* argv[])
 {
+	if (argc < 2) {
+		printf("usage: ./nvm file\n\n");
+		printf("file: an ELF file with naja bytecode\n");
+		return -1;
+	}
+
 	scf_vm_t* vm = NULL;
 
 	int ret = scf_vm_open(&vm, "naja");
@@ -10,7 +16,7 @@ int main()
 		return -1;
 	}
 
-	ret = scf_vm_run(vm, "../parse/1.out", "x64");
+	ret = scf_vm_run(vm, argv[1], "x64");
 	if (ret < 0) {
 		scf_loge("\n");
 		return -1;