add example c99 library mimicking the structures of the pEpEngine in a minimal way.

examples/libc99/libc99.c

@@ -0,0 +1,28 @@
+#include "libc99.h"
+#include <stdlib.h>
+#include <string.h>
+
+Test_struct1* new_test_struct(int c_int, Test_enum c_enum, const char* c_str)
+{
+    Test_struct1* result = calloc(1, sizeof(Test_struct1));
+    if (result) {
+        result->c_int = c_int;
+        result->c_enum = c_enum;
+        if (c_str) {
+            result->c_str = strdup(c_str);
+            if (result->c_str == NULL) {
+                free_test_struct(result);
+                return NULL;
+            }
+        }
+    }
+    return result;
+}
+
+void free_test_struct(Test_struct1* c_struct)
+{
+    if (c_struct) {
+        free(c_struct->c_str);
+        free(c_struct);
+    }
+}

examples/libc99/libc99.h

@@ -0,0 +1,37 @@
+// We are testing wrappers for the c-datatypes:
+// * integral e.g (int) here
+// * enum
+// * c-string
+// * struct
+// Those are all considered POD-types
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    typedef enum
+    {
+        ONE,
+        TWO,
+        THREE
+    } Test_enum;
+
+    typedef struct {
+        int c_int;
+        Test_enum c_enum;
+        char* c_str;
+    } Test_struct1;
+
+    typedef struct {
+        int c_int;
+        Test_enum c_enum;
+        char* c_str;
+        Test_struct1* c_struct1;
+    } Test_struct2;
+
+
+    Test_struct1* new_test_struct(int c_int, Test_enum c_enum, const char* c_str);
+
+    void free_test_struct(Test_struct1* c_struct);
+#ifdef __cplusplus
+}
+#endif

examples/libc99/makefile

@@ -0,0 +1,27 @@
+LIB_STATIC=libc99.a
+LIB_DYN=libc99.so
+
+CFLAGS+=-std=c99 -g -UNDEBUG
+
+SRCS+=$(wildcard *.c)
+OBJS_C+=$(SRCS:.c=.o)
+
+.PHONY: all lib_static lib_dyn clean
+
+all: lib_static lib_dyn
+
+lib_static: $(LIB_STATIC)
+
+lib_dyn: $(LIB_DYN)
+
+$(LIB_STATIC): $(OBJS_C)
+	$(AR) -rc $@ $^
+
+$(LIB_DYN): $(OBJS_C)
+	$(CC) $(CFLAGS) -shared -o $@ $^
+
+clean:
+	rm -f $(LIB_STATIC)
+	rm -f $(LIB_DYN)
+	rm -f $(OBJS_C)
+