From 33824b31f663b162eca2969f9c3002aba18e1022 Mon Sep 17 00:00:00 2001
From: Adam Fordsmand <indermandfrainderland@gmail.com>
Date: Tue, 16 Nov 2021 09:11:54 +0100
Subject: [PATCH] Added comments

---
 BlogDB.c | 50 ++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/BlogDB.c b/BlogDB.c
index 88afc08..e46dfa4 100644
--- a/BlogDB.c
+++ b/BlogDB.c
@@ -850,8 +850,8 @@ int PostIDs(int** arr, MYSQL* con)
     MYSQL_ROW row;
     row = mysql_fetch_row(result);
 
+    // Get the Count
     int count = atoi(row[0]);
-    printf("%d\n", count);
 
     free(result);
    
@@ -865,18 +865,28 @@ int PostIDs(int** arr, MYSQL* con)
 
     MYSQL_RES *result2 = mysql_store_result(con);
 
+    // Allocate the array that was passed by reference
+    // To be one larger than I need.
     *arr = (int *)malloc(sizeof(int) * (count + 1));
-    //printf("arr was allocated: %db of memory\n", sizeof(int) * (count + 1));
 
+    // loop count times.
     for (int i = 0; i < count; ++i) {
+        //Get row
         row = mysql_fetch_row(result2);
+
+        // If the row exists (I counted them, so it must exist.)
         if (row != NULL) {
+            // Set the i-th element of the array, that was passed by reference, to be the current row's ID
             *(*arr + i) = atoi(row[0]);
         }
     }
 
+    // Set the last element in the array passed by reference to -1,
+    // As an ID can never be negative, it can ensure that it never
+    // Enters unknown memory.
     *(*arr + count) = -1;
 
+    // Return the count, for easy looping.
     return count;
 }
 
@@ -903,8 +913,8 @@ int ActivePostIDs(int** arr, MYSQL* con)
     MYSQL_ROW row;
     row = mysql_fetch_row(result);
 
+    // Get the Count
     int count = atoi(row[0]);
-    printf("%d\n", count);
 
     free(result);
    
@@ -918,18 +928,28 @@ int ActivePostIDs(int** arr, MYSQL* con)
 
     MYSQL_RES *result2 = mysql_store_result(con);
 
+    // Allocate the array that was passed by reference
+    // To be one larger than I need.
     *arr = (int *)malloc(sizeof(int) * (count + 1));
-    //printf("arr was allocated: %db of memory\n", sizeof(int) * (count + 1));
 
+    // loop count times.
     for (int i = 0; i < count; ++i) {
+        //Get row
         row = mysql_fetch_row(result2);
+
+        // If the row exists (I counted them, so it must exist.)
         if (row != NULL) {
+            // Set the i-th element of the array, that was passed by reference, to be the current row's ID
             *(*arr + i) = atoi(row[0]);
         }
     }
 
+    // Set the last element in the array passed by reference to -1,
+    // As an ID can never be negative, it can ensure that it never
+    // Enters unknown memory.
     *(*arr + count) = -1;
 
+    // Return the count, for easy looping.
     return count;
 }
 
@@ -956,8 +976,8 @@ int AuthorIDs(int** arr, MYSQL* con)
     MYSQL_ROW row;
     row = mysql_fetch_row(result);
 
+    // Get the Count
     int count = atoi(row[0]);
-    //printf("%d\n", count);
 
     free(result);
    
@@ -971,18 +991,28 @@ int AuthorIDs(int** arr, MYSQL* con)
 
     MYSQL_RES *result2 = mysql_store_result(con);
 
+    // Allocate the array that was passed by reference
+    // To be one larger than I need.
     *arr = (int *)malloc(sizeof(int) * (count + 1));
-    //printf("arr was allocated: %db of memory\n", sizeof(int) * (count + 1));
 
+    // loop count times.
     for (int i = 0; i < count; ++i) {
+        //Get row
         row = mysql_fetch_row(result2);
+
+        // If the row exists (I counted them, so it must exist.)
         if (row != NULL) {
+            // Set the i-th element of the array, that was passed by reference, to be the current row's ID
             *(*arr + i) = atoi(row[0]);
         }
     }
 
+    // Set the last element in the array passed by reference to -1,
+    // As an ID can never be negative, it can ensure that it never
+    // Enters unknown memory.
     *(*arr + count) = -1;
 
+    // Return the count, for easy looping.
     return count;
 }
 
@@ -1035,10 +1065,10 @@ int main(int argc, char *argv[])
     
     // Generate array of IDs
     int *postIDs;
-    int count2 = PostIDs(&postIDs, NULL);
+    int count1 = PostIDs(&postIDs, NULL);
 
     // Loop until element is negative i.e. the last
-    for (int i = 0; i < count2; ++i) 
+    for (int i = 0; i < count1; ++i) 
     {
         // Print contents on a new line
         printf("%d\n", postIDs[i]);
@@ -1057,10 +1087,10 @@ int main(int argc, char *argv[])
     
     // Generate array of IDs
     int *activePostIDs;
-    int count1 = AuthorIDs(&activePostIDs, NULL);
+    int count2 = ActivePostIDs(&activePostIDs, NULL);
 
     // Loop until element is negative i.e. the last
-    for (int i = 0; i < count1; ++i) 
+    for (int i = 0; i < count2; ++i) 
     {
         // Print contents on a new line
         printf("%d\n", activePostIDs[i]);