Fix and unittest lqueue functions in trick_adt.

include/trick/lqueue.h

@@ -21,6 +21,7 @@ typedef struct _LQUEUE
 
 LQUEUE* LQ_Create(void);   /* create and initialize a LQUEUE */
 
+int LQ_Delete(LQUEUE* lqueue); /* free an lqueue object created by LQ_Create.*/
 
 void LQ_Init(LQUEUE*);     /* initialize a LQUEUE */
 

trick_source/trick_utils/trick_adt/src/lqueue.c

@@ -16,11 +16,24 @@ LQUEUE *LQ_Create(void)
     return ret;
 }
 
+int LQ_Delete(LQUEUE* lqueue) {
+
+    if (lqueue == NULL) {
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.\n", __FUNCTION__ );
+        fflush(stderr);
+        return -1;
+    }
+    DLL_Delete(&lqueue->list);
+    return 0;
+}
 
 /* initialize a queue created statically */
 void LQ_Init(LQUEUE * pQueue)
 {
-
+    if (pQueue == NULL) {
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.\n", __FUNCTION__ );
+        fflush(stderr);
+    }
     DLL_Init(&(pQueue->list));
 }
 
@@ -31,7 +44,7 @@ void LQ_EnQ(void *pData, LQUEUE * pQueue)
 {
 
     if (pQueue == NULL) {
-        fprintf(stderr, "Queue is NULL");
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.", __FUNCTION__ );
         return;
     }
 
@@ -43,8 +56,14 @@ void LQ_EnQ(void *pData, LQUEUE * pQueue)
 
 void *LQ_DeQ(LQUEUE * pQueue)
 {
-    if (LQ_GetCount(pQueue) > 0)
+    if (pQueue == NULL) {
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.", __FUNCTION__ );
+        return NULL;
+    }
+
+    if (LQ_GetCount(pQueue) > 0) {
         return DLL_RemoveAt(DLL_GetTailPosition(&(pQueue->list)), &(pQueue->list));
+    }
     return NULL;
 }
 
@@ -53,15 +72,19 @@ void *LQ_DeQ(LQUEUE * pQueue)
 
 void *LQ_Peek(LQUEUE * pQueue)
 {
-
-    if (pQueue == NULL && DLL_GetCount(&(pQueue->list)) <= 0) {
-        fprintf(stderr, "Queue is NULL and number of elements is 0");
+    if (pQueue == NULL) {
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.", __FUNCTION__);
+        fflush(stderr);
         return NULL;
     }
 
-    if (pQueue != NULL)
-        return DLL_GetAt(DLL_GetTailPosition(&(pQueue->list)), &(pQueue->list));
-    return NULL;
+    if ( DLL_GetCount( &(pQueue->list)) <= 0) {
+        fprintf(stderr, "Error (%s): LQUEUE is empty.", __FUNCTION__);
+        fflush(stderr);
+        return NULL;
+    }
+
+    return DLL_GetAt(DLL_GetTailPosition(&(pQueue->list)), &(pQueue->list));
 }
 
 
@@ -71,7 +94,7 @@ int LQ_GetCount(LQUEUE * pQueue)
 {
 
     if (pQueue == NULL) {
-        fprintf(stderr, "Queue is NULL");
+        fprintf(stderr, "Error (%s): Pointer to LQUEUE is NULL.", __FUNCTION__ );
         return -1;
     }
 

trick_source/trick_utils/trick_adt/test/Makefile

@@ -18,7 +18,8 @@ TRICK_EXEC_LINK_LIBS += -lpthread
 # ==================================================================================
 # All tests produced by this Makefile. Add new tests you create to this list.
 # ==================================================================================
-TESTS = dllist_unittest
+TESTS = dllist_unittest\
+        lqueue_unittest
 
 # List of XML files produced by the tests.
 unittest_results = $(patsubst %,%.xml,$(TESTS))
@@ -58,3 +59,7 @@ $(unittest_objects): %.o: %.cpp
 # ==================================================================================
 $(TESTS) : %: %.o
 	$(TRICK_CXX) $(TRICK_SYSTEM_LDFLAGS) -o $@ $^ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(TRICK_LIBS) $(TRICK_EXEC_LINK_LIBS)
+
+# ----------------------------------------------------------------------------------
+# The following unittest programs are also dependent on the indicated object files.
+# ----------------------------------------------------------------------------------

trick_source/trick_utils/trick_adt/test/lqueue_unittest.cpp

@@ -0,0 +1,142 @@
+#include <gtest/gtest.h>
+#include <iostream>
+#include "trick/lqueue.h"
+
+/*
+
+LQUEUE* LQ_Create(void);
+int LQ_Delete(LQUEUE* lqueue);              free an lqueue object created by LQ_Create.
+void LQ_Init(LQUEUE*);
+void LQ_EnQ(void* pData,LQUEUE* pQueue);    insert data into queue
+void* LQ_DeQ(LQUEUE* pQueue);               extract data from queue
+void* LQ_Peek(LQUEUE* pQueue);              get data off queue without extracting
+int LQ_GetCount(LQUEUE* pQueue);            returns number of items in the queue
+
+BUG: There's no way to free an LQUEUE without a memory leak.
+*/
+
+
+
+TEST(lqueue_test, LQUEUE_Create) {
+    LQUEUE* result = LQ_Create();
+    EXPECT_NE(result, nullptr);
+    EXPECT_EQ( LQ_GetCount(result), 0);
+}
+
+TEST(lqueue_test, LQUEUE_Delete) {
+    LQUEUE* lqueue = LQ_Create();
+    EXPECT_EQ( LQ_Delete(lqueue), 0);
+}
+
+TEST(lqueue_test, LQUEUE_Delete_null) {
+
+    LQUEUE* lqueue = nullptr;
+    std::cout << "NOTE: An error message is expected to follow." << std::endl;
+    EXPECT_EQ( LQ_Delete(lqueue), -1);
+}
+
+TEST(lqueue_test, LQUEUE_Init) {
+
+    LQUEUE* lqueue = LQ_Create();
+    lqueue->list.count = 1;
+    lqueue->list.head = (DLLNODE*)(0xDEADBEEF);
+    lqueue->list.tail = (DLLNODE*)(0xDEADBEEF);
+    LQ_Init(lqueue);
+    EXPECT_EQ(lqueue->list.count, 0);
+    EXPECT_EQ(lqueue->list.head, nullptr);
+    EXPECT_EQ(lqueue->list.tail, nullptr);
+    EXPECT_EQ(lqueue->list.compare, nullptr);
+    EXPECT_EQ( LQ_GetCount(lqueue), 0);
+}
+
+TEST(lqueue_test, LQUEUE_Init_null) {
+
+    LQUEUE* lqueue = nullptr;
+    std::cout << "NOTE: Two error messages are expected to follow." << std::endl;
+    LQ_Init(lqueue);
+
+}
+
+TEST(lqueue_test, LQUEUE_EnQ) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    LQUEUE* lqueue = LQ_Create();
+    LQ_EnQ( &A, lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 1);
+    LQ_EnQ( &B, lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 2);
+    LQ_EnQ( &C, lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 3);
+}
+
+TEST(lqueue_test, LQUEUE_EnQ_null_queue) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    LQUEUE* lqueue = LQ_Create();
+    std::cout << "NOTE: An error message is expected to follow." << std::endl;
+    LQ_EnQ( &A, nullptr);
+
+}
+
+TEST(lqueue_test, LQUEUE_DeQ) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    LQUEUE* lqueue = LQ_Create();
+    LQ_EnQ( &A, lqueue);
+    LQ_EnQ( &B, lqueue);
+    LQ_EnQ( &C, lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 3);
+    LQ_DeQ( lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 2);
+    LQ_DeQ( lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 1);
+    LQ_DeQ( lqueue);
+    EXPECT_EQ( LQ_GetCount(lqueue), 0);
+}
+
+TEST(lqueue_test, LQUEUE_DeQ_null_queue) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    LQUEUE* lqueue = nullptr;
+    std::cout << "NOTE: An error message is expected to follow." << std::endl;
+    LQ_EnQ( &A, lqueue);
+}
+
+TEST(lqueue_test, LQUEUE_Peek) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    int* result;
+    LQUEUE* lqueue = LQ_Create();
+    LQ_EnQ( &A, lqueue);
+    LQ_EnQ( &B, lqueue);
+    LQ_EnQ( &C, lqueue);
+
+    EXPECT_EQ( LQ_GetCount(lqueue), 3);
+    result = (int*)LQ_Peek(lqueue);
+    EXPECT_EQ(*result, 1);
+    LQ_DeQ( lqueue);
+
+    EXPECT_EQ( LQ_GetCount(lqueue), 2);
+    result = (int*)LQ_Peek(lqueue);
+    EXPECT_EQ(*result, 2);
+    LQ_DeQ( lqueue);
+
+    EXPECT_EQ( LQ_GetCount(lqueue), 1);
+    result = (int*)LQ_Peek(lqueue);
+    EXPECT_EQ(*result, 3);
+    LQ_DeQ( lqueue);
+
+    EXPECT_EQ( LQ_GetCount(lqueue), 0);
+    std::cout << "NOTE: An error message is expected to follow." << std::endl;
+    result = (int*)LQ_Peek(lqueue);
+    EXPECT_EQ(result, nullptr);
+}
+
+TEST(lqueue_test, LQUEUE_Peek_null_queue) {
+    int A,B,C;
+    A=1; B=2; C=3;
+    int* result = (int*)(0xDEADBEEF);;
+    LQUEUE* lqueue = nullptr;
+    result = (int*)LQ_Peek(lqueue);
+    EXPECT_EQ(result, nullptr);
+}