From ac04c8d2449dbb4010cd5290bfec72db8636677e Mon Sep 17 00:00:00 2001
From: fdai7057 <julius-philipp.engel@informatik.hs-fulda.de>
Date: Sat, 4 Feb 2023 18:05:46 +0100
Subject: [PATCH] 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                               |  3 ++-
 project.yml                                   |  2 +-
 src/createCustomer.h                          |  2 +-
 ...stringManipulation.c => helperFunctions.c} | 23 ++++++++++++++++++-
 ...stringManipulation.h => helperFunctions.h} |  1 +
 src/loginCustomer.h                           |  1 -
 test/test_CreateCustomer.c                    |  2 +-
 test/test_LoginCustomer.c                     |  2 +-
 ...gManipulation.c => test_helperFunctions.c} |  2 +-
 9 files changed, 30 insertions(+), 8 deletions(-)
 rename src/{stringManipulation.c => helperFunctions.c} (86%)
 rename src/{stringManipulation.h => helperFunctions.h} (95%)
 rename test/{test_StringManipulation.c => test_helperFunctions.c} (99%)

diff --git a/build-script.sh b/build-script.sh
index fd72393..34cdd7c 100755
--- a/build-script.sh
+++ b/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 ..
diff --git a/project.yml b/project.yml
index 91cbc02..0474ba1 100644
--- a/project.yml
+++ b/project.yml
@@ -36,7 +36,7 @@
   :source:
     - src/createCustomer.*
     - src/customerLogin.*
-    - src/stringManipulation.*  
+    - src/helperFunctions.*  
     - src/error.*
   :support:
     - test/support
diff --git a/src/createCustomer.h b/src/createCustomer.h
index 112d2ac..1b87870 100644
--- a/src/createCustomer.h
+++ b/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();
diff --git a/src/stringManipulation.c b/src/helperFunctions.c
similarity index 86%
rename from src/stringManipulation.c
rename to src/helperFunctions.c
index 29111f5..28ec136 100644
--- a/src/stringManipulation.c
+++ b/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;
+}
diff --git a/src/stringManipulation.h b/src/helperFunctions.h
similarity index 95%
rename from src/stringManipulation.h
rename to src/helperFunctions.h
index 13bd217..ef5383b 100644
--- a/src/stringManipulation.h
+++ b/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
diff --git a/src/loginCustomer.h b/src/loginCustomer.h
index 9e5f1b0..251e0d9 100644
--- a/src/loginCustomer.h
+++ b/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
diff --git a/test/test_CreateCustomer.c b/test/test_CreateCustomer.c
index 85122a7..4b48a74 100644
--- a/test/test_CreateCustomer.c
+++ b/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"
 
diff --git a/test/test_LoginCustomer.c b/test/test_LoginCustomer.c
index a293a0d..61a7a75 100644
--- a/test/test_LoginCustomer.c
+++ b/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(){};
diff --git a/test/test_StringManipulation.c b/test/test_helperFunctions.c
similarity index 99%
rename from test/test_StringManipulation.c
rename to test/test_helperFunctions.c
index efbd1b2..57157b8 100644
--- a/test/test_StringManipulation.c
+++ b/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()