1 files changed, 148 insertions, 0 deletions
diff --git a/tests/functions.sh b/tests/functions.sh
new file mode 100644
index 0000000..ddae9b2
--- /dev/null
+++ b/tests/functions.sh
@@ -0,0 +1,148 @@
+# function pointers
+cat <<'EOF' > expected
+a
+h
+g
+EOF
+
+test_diff <<'EOF'
+int* f1(int a);
+int (*f2)(int a);
+
+extern int atexit (void (*) (void));
+extern int atexit (void (*fn) (void));
+
+int printf(const char*, ...);
+
+void g() { printf("g\n"); }
+void h() { printf("h\n"); }
+
+int main() {
+    atexit(g);
+    atexit(h);
+    printf("a\n");
+}
+EOF
+
+# void functions
+cat <<'EOF' > expected
+123
+EOF
+test_diff <<'EOF'
+int printf();
+
+void foo_bar(int hoge_piyo) {
+    printf("%d\n", hoge_piyo);
+}
+
+int main() {
+    foo_bar(123);
+    return 0;
+}
+EOF
+
+cat <<'EOF' > expected
+EOF
+test_diff <<'EOF'
+struct S {
+    int a;
+};
+
+struct S* f();
+
+struct S* g() {}
+
+int main() {
+    return 0;
+}
+EOF
+
+cat <<'EOF' > expected
+hi
+EOF
+test_diff <<'EOF'
+int printf();
+
+void f() {
+    printf("hi\n");
+    return;
+}
+
+int main() {
+    f();
+    return 0;
+}
+EOF
+
+# variadic functions
+cat <<'EOF' > expected
+123
+456 789
+EOF
+
+test_diff <<'EOF'
+#include <stdarg.h>
+
+int fprintf();
+
+struct FILE;
+typedef struct FILE FILE;
+
+extern FILE* stdout;
+
+int vfprintf(FILE*, const char*, va_list);
+
+void fatal_error(const char* msg, ...) {
+    va_list args;
+    va_start(args, msg);
+    vfprintf(stdout, msg, args);
+    va_end(args);
+    fprintf(stdout, "\n");
+}
+
+int main() {
+    fatal_error("%d", 123);
+    fatal_error("%d %d", 456, 789);
+    return 0;
+}
+EOF
+
+test_exit_code 0 <<'EOF'
+#include <stdarg.h>
+#include <helpers.h>
+
+int sum(int n, ...) {
+    va_list args;
+    va_start(args, n);
+    int s = 0;
+    for (int i = 0; i < n; ++i) {
+        s += va_arg(args, int);
+    }
+    va_end(args);
+    return s;
+}
+
+int main() {
+    ASSERT_EQ(400, sum(5, 100, 90, 80, 70, 60));
+}
+EOF
+
+# implicit return
+# C99: 5.1.2.2.3
+test_exit_code 0 <<'EOF'
+int main() {
+}
+EOF
+
+test_exit_code 0 <<'EOF'
+int main() {
+    1 + 2 + 3;
+}
+EOF
+
+test_exit_code 0 <<'EOF'
+int main() {
+    if (1);
+    else return 1;
+}
+EOF