Implementation of function stod() and rename file stringManipulation.{c,h} to helperFunctions.{c,h} because the functions implemented there address different problems and not only string-specific problems.

build-script.sh

@@ -1,7 +1,8 @@
 clear
 ceedling test:all
+rm -r build
 cd src/
-gcc stringManipulation.c error.c loginCustomer.c createCustomer.c mainMenu.c program.c -lm -o program.out
+gcc helperFunctions.c error.c loginCustomer.c createCustomer.c mainMenu.c program.c -lm -o program.out
 ./program.out
 rm program.out
 cd ..

project.yml

@@ -36,7 +36,7 @@
   :source:
     - src/createCustomer.*
     - src/customerLogin.*
-    - src/stringManipulation.*  
+    - src/helperFunctions.*  
     - src/error.*
   :support:
     - test/support

src/createCustomer.h

@@ -5,7 +5,7 @@
 #include <stdbool.h>
 #include <time.h>
 #include "customerProperties.h"
-#include "stringManipulation.h"
+#include "helperFunctions.h"
 #include "error.h"
 int generateID();
 void collectCustomerProperties();

src/stringManipulation.c → src/helperFunctions.c

@@ -1,4 +1,4 @@
-#include "stringManipulation.h"
+#include "helperFunctions.h"
 /*Code written by Julius Philipp Engel, fdai7057*/
 
 char *stringConcatenation(char *string_1, char *string_2)
@@ -116,3 +116,24 @@ char *generateCheckString(unsigned int customerID, char *customerPassword)
 	*(checkString+checkStringLength) = '\0';
 	return checkString;
 }
+
+double stod(char *s)
+{
+	double result, power;
+	int i=0, sign;
+	sign = (*(s) == '-') ? -1 : 1;
+	if(*(s)=='+'||*(s)=='-'){
+		++i;
+	}
+	for(result = 0.0; *(s+i)!='.';++i){
+		result = 10.0 * result + (*(s+i) - '0');
+	}
+	if(*(s+i)=='.'){
+		++i;
+	}
+	for(power = 1.0;*(s+i)!='\0';++i){
+		result = 10.0 * result + (*(s+i)- '0');
+		power *= 10.0;
+	}
+	return sign * result / power;
+}

src/stringManipulation.h → src/helperFunctions.h

@@ -11,4 +11,5 @@ unsigned int toUnsignedInteger(char *);
 unsigned int power(unsigned int, unsigned int);
 bool everyCharacterIsDigit(char *);
 bool isLetterOfAlphabet(char *);
+double stod(char *);
 #endif

src/loginCustomer.h

@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <string.h>
-/*#include "stringManipulation.h"*/
 #include "createCustomer.h"
 #include "error.h"
 #define MAX_LOGIN_ATTEMPTS 3

test/test_CreateCustomer.c

@@ -1,7 +1,7 @@
 #include <unity.h>
 #include <limits.h>
 #include <math.h>
-#include "../src/stringManipulation.c"
+#include "../src/helperFunctions.c"
 #include "../src/error.c"
 #include "../src/createCustomer.c"
 

test/test_LoginCustomer.c

@@ -1,6 +1,6 @@
 #include <unity.h>
 #include "../src/loginCustomer.c"
-#include "../src/stringManipulation.c"
+#include "../src/helperFunctions.c"
 #include "../src/error.c"
 void setUp(){};
 void tearDown(){};

test/test_StringManipulation.c → test/test_helperFunctions.c

@@ -2,7 +2,7 @@
 #include <time.h>
 #include <string.h>
 #include <unity.h>
-#include "../src/stringManipulation.c"
+#include "../src/helperFunctions.c"
 
 
 void test_isLetterOfAlphabet()