Work in progress

Refactoring cstr_copy and adding test

src/util/cstr_helper.c

@@ -17,13 +17,10 @@
 #include "cstr_helper.h"
 
 
-int cstr_copy(const char *source, char **dest)
+int cstr_duplicate(char **dest, const char *source)
-// Determines length, allocates memory, and returns a null terminated copy
+// Duplicates source string
-// Be Aware: caller is responsible for freeing memory
 {
-    size_t size;
+    size_t size = 1 + strlen(source);
-
-    size = 1 + strlen(source);
     *dest = (char *) calloc(size, sizeof(char));
 
     if (*dest == NULL)

src/util/cstr_helper.h

@@ -23,7 +23,7 @@ extern "C" {
 #endif
 
 
-int cstr_copy(const char *source, char **destination);
+int cstr_duplicate(char **dest, const char *source);
 
 bool cstr_validate_id(const char *element_id);
 

src/util/filemanager.c

@@ -63,7 +63,7 @@ int get_filename(file_handle_t *file_handle, char **filename)
 // BE AWARE: The memory allocated here must be freed by the caller
 //
 {
-    return cstr_copy(file_handle->filename, filename);
+    return cstr_duplicate(filename, file_handle->filename);
 }
 
 
@@ -73,7 +73,7 @@ int open_file(file_handle_t *file_handle, const char *filename, const char *file
     if (filename == NULL)
         _get_temp_filename(&(file_handle->filename));
     else
-        cstr_copy(filename, &(file_handle->filename));
+        cstr_duplicate(&(file_handle->filename), filename);
 
     if (file_mode == NULL)
         error = -1;
@@ -195,7 +195,7 @@ int _get_temp_filename(char **tempname)
         return error;
     }
     else
-        cstr_copy(name, tempname);
+        cstr_duplicate(tempname, name);
 
     // --- free the pointer returned by _tempnam
     if (name)
@@ -204,7 +204,7 @@ int _get_temp_filename(char **tempname)
     // --- for non-Windows systems:
 #else
     // --- use system function mkstemp() to create a temporary file name
-    cstr_copy("enXXXXXX", tempname);
+    cstr_duplicate(tempname, "enXXXXXX");
     error = mkstemp(*tempname);
 #endif
     return error;

tests/util/test_cstrhelper.cpp

@@ -17,9 +17,31 @@
 #include "util/cstr_helper.h"
 
 
+boost::test_tools::predicate_result check_string(std::string test, std::string ref)
+{
+    if (ref.compare(test) == 0)
+        return true;
+    else
+        return false;
+}
+
+
 BOOST_AUTO_TEST_SUITE(test_cstrhelper)
 
 
+BOOST_AUTO_TEST_CASE(test_duplicate) {
+    char source[] = "I will be rewarded for good behavior.";
+    char *dest = NULL;
+
+    cstr_duplicate(&dest, source);
+    BOOST_CHECK(check_string(dest, source));
+    BOOST_CHECK(cstr_isnullterm(dest) == true);
+
+    free(dest);
+    free(source);
+}
+
+
 BOOST_AUTO_TEST_CASE(test_validate_id) {
 
     BOOST_CHECK(cstr_validate_id("big tank") == false);