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+[English](#markdown-header-repetition-structures-vigenere-cipher) | [Español](#markdown-header-estructuras-de-repeticion-cifrado-vigenere)
+
+# Estructuras de repetición - Cifrado Vigenere
+
+![main1.png](images/main1.png)
+![main2.png](images/main2.png)
+![main3.png](images/main3.png)
+
+
+Una de las ventajas de utilizar programas de computadoras es que podemos realizar tareas repetitivas fácilmente. Los ciclos como `for`, `while`, y `do-while` son  estructuras de control que nos permiten repetir un conjunto de instrucciones. A estas estructuras también se les llama *estructuras de repetición*. En la experiencia de laboratorio de hoy utilizarás ciclos `for`  para completar una aplicación de cifrado.
+
+##Objetivos:
+
+1. Aplicar estructuras de repetición para cifrar un mensaje.
+2. Practicar operaciones aritméticas con caracteres.
+
+##Pre-Lab:
+
+Antes de llegar al laboratorio debes:
+
+1. Haber repasado los conceptos básicos relacionados a estructuras de repetición.
+
+2. Haber repasado conceptos básicos de la clase `string` de C++,las funciones `length`, `toupper` y `push_back`, `isalpha` y las operaciones aritméticas con caracteres.
+
+3. Haber visto el video sobre el "Ceasar Cypher" del Khan Academy, colocado en <https://www.youtube.com/watch?v=sMOZf4GN3oc>.
+
+4. Haber visto el video sobre el "Vigenere Cypher", colocado en <https://www.youtube.com/watch?v=9zASwVoshiM>.
+
+5. Haber estudiado los conceptos e instrucciones para la sesión de laboratorio.
+
+6. Haber tomado el quiz Pre-Lab que se encuentra en Moodle.
+
+---
+
+---
+
+##Criptografía 
+
+La *criptografía* es un área que estudia la teoría y los métodos utilizados para proteger información de modo que personas que no estén autorizadas no puedan tener acceso a ella. Un *sistema criptográfico* es un sistema en el que la información (*mensaje* entendible por humanos)  es tranformada a un texto cifrado inentendible para las personas no autorizadas a verlo. Las personas autorizadas a ver el mensaje usan un *descifrador* para revertir el texto cifrado al mensaje original.  
+
+###El Cifrado César (Ceasar Cypher)
+
+El Cifrado César es una técnica muy simple de cifrado por sustitución. Se dice que el sistema se basa en el sistema utilizado por Julio César, líder militar y político de Roma en años antes de Cristo, para comunicarse con sus generales. La técnica cifra un mensaje de texto sustituyendo cada letra del mensaje por la letra que se encuentra a un número dado de posiciones más adelante en el alfabeto. Esto puede pensarse como un desplazamiento ("shift") del alfabeto. El diagrama de la Figura 1 representa un desplazamiento de 3 espacios. La letra ‘B’ es sustituida por la letra ‘E’.
+
+---
+
+![figure1.png](images/figure1.png)
+
+**Figura 1.** Cifrador César con desplazamiento de 3 espacios.
+
+---
+
+**Ejemplo 1:** Con un desplazamiento de 3 espacios, la palabra "ARROZ" quedaría cifrada como "DUURC". Nota que, con este desplazamiento de 3 espacios, la letra ‘Z’ es sustituida por la letra ‘C’.  Cuando el desplazamiento se pasa de la letra ‘Z’ comenzamos nuevamente en la letra ‘A’. Esto se llama un desplazamiento cíclico. La Figura 2  muestra un desplazamiento cíclico de 8 espacios.
+
+---
+
+![figure2.png](images/figure2.png)
+
+**Figura 2.** Disco para cifrador César que muestra un desplazamiento de 8 espacios.
+
+---
+
+###Utilizando el operador módulo
+
+La operación de suma modular es esencial para implementar sistemas de cifrado en programación. En la aplicación de cifrado César de arriba podemos pensar que a cada letra del alfabeto (en inglés) le asignamos un número entre 0 y 25 (La `A` es 0, la`B` es 1, …, la `Z` es 25). El cifrador César convierte cada letra al número correspondiente en el intervalo [0, 25] y luego suma el desplazamiento. Para hacer el desplazamiento cíclico, cada vez que nuestro desplazamiento nos dé una letra que corresponda a un número mayor que 25, tomamos el residuo al dividir por 26 y usamos la letra que corresponda a ese residuo. Nota que tomar el residuo al dividir por 26 los resultados estarán entre 0 y 25, que son los valores asociados al alfabeto.
+
+El residuo al dividir dos números enteros se puede obtener utilizando el operador de *módulo*: `%`.
+
+Volviendo al Ejemplo 1, en la palabra "ARROZ", a la letra ‘Z’ le corresponde el número 25; al hacer un desplazamiento de 3 espacios, sumamos 3 a 25 y esto nos resulta en 28 que es un número mayor que 25. Si tomamos el residuo al dividir $25 + 3$ por 26, `(25 + 3) % 26`, obtenemos 2, que corresponde a la letra ‘C’. 
+
+El proceso de arriba funciona si podemos asociar las letras de la ‘A’ a la ‘Z’ con los números del `0` al `25`. Esto se logra utilizando el valor numérico de los caracteres. Como en  el código ASCII el valor de las letras ‘A’ a la ‘Z’ va desde 65 hasta 90,  necesitamos hacer un ajuste en el cómputo de modo que a la `A` se le asigne `0`. Para convertir una letra mayúscula a un número en el intervalo [0, 25] solo tenemos que restar 65 (`’A’ - 65 = 0`, `’Z’ - 65 = 25`). Para cambiar un valor en el intervalo [0, 25] a la letra mayúscula que corresponde en el código ASCII solo tenemos que sumar 65 al número. Por ejemplo, el número 3 corresponde a la letra cuyo código ASCII es $3 + 65 = 68$, la letra ‘D’.
+
+La Figura 3 muestra el pseudocódigo para una algoritmo para el cifrador César. Cada letra ‘c’ en el mensaje se convierte a un número en el intervalo [0, 25] (restándole ‘A’), luego se hace el desplazamiento de d unidades al número (sumando d módulo 26). Finalmente se convierte el resultado al caracter correspondiente sumando el código ASCII de ‘A’.
+
+---
+
+```cpp
+    Datos de entrada: un "string" de mensaje, la cantidad de desplazamiento d 
+    Datos de salida: el mensaje cifrado usando cifrado César 
+
+    1. cypheredText = ""
+    2. para ("for") cada caracter c in en el mensaje:
+           c = ascii(c) - ascii('A')  # mueve c del intervalo [A,Z] al [0,25]
+           c = ( c + d ) % 26         # desplaza (cíclicamente) c por d unidades
+           c = ascii(c) + ascii('A')  # mueve c del intervalo [0,25] al [A,Z]
+           cypheredText.append(c) 
+    3. devuelve ("return") cypheredText 
+```
+
+**Figura 3.** Pseudo-código para cifrar utilizando un cifrador César.
+
+---
+
+El cifrado César no es muy seguro ya que puede descifrarse fácilmente con un análisis de frecuencia. Por ejemplo, se sabe que en el idioma inglés la letra ‘e’ es la letra más frecuente en un texto. Si buscamos la letra que más se repite en un texto cifrado con un cifrador César, lo más probable es que esa fue la letra que se sustituyó por la ‘e’; con esto podemos deducir cuál fue desplazamiento utilizado y así descifrar el mensaje.
+
+PONER PREGUNTAS DIAGNOSTICAS AQUí
+
+###El Cifrado Vigenere 
+
+La debilidad principal del cifrador César es que cada letra en el mensaje se desplaza por el mismo número de posiciones. El cifrado Vigenere es un método de cifrado un poco más fuerte porque el desplazamiento en cada letra no es constante. El cifrado César recibe como datos de entrada el mensaje y un desplazamiento, mientras que el cifrado Vigenere recibe como dato de entrada el mensaje y una **clave** que determina el desplazamiento que se le hará a cada letra del mensaje.
+
+**Ejemplo 2.** Supongamos por el momento que tanto el mensaje como la clave tienen el mismo largo. Por ejemplo, suponga que el mensaje es "COSAS" y la palabra clave es "MENOR". La letra ‘C’ se parea con la letra ‘M’, la letra ‘O’ se parea con la letra ‘E’, la ‘S’ con la ‘N’, etcétera, como en la figura de abajo. Como la letra ‘A’ corresponde a un desplazamiento de 0 espacios, entonces la letra ‘M’ corresponde a un desplazamiento de 12 espacios, la ‘E’ a un desplazamiento de 4 espacios, etc. Utilizando la palabra clave "MENOR", el cifrador Vigenere hará un desplazamiento de 12 espacios a la letra ‘C’, un desplazamiento de 4 espacios a la letra ‘O’, etc., hasta obtener la palabra cifrada "OSFOJ" como se muestra en la Figura 4. 
+
+---
+
+| mensaje         | C | O | S | A | S |
+|-----------------|---|---|---|---|---|
+| clave           | M | E | N | O | R |
+| mensaje cifrado | O | S | F | O | J  |
+
+**Figura 4.** Alineamiento del mensaje con la palabra clave y cifrado.
+
+---
+
+Podemos visualizar un cifrador Vigenere utilizando una tabla como la de la Figura 5. Nota que lo que se hace es usar un cifrador César con un desplazamiento diferente para cada letra del mensaje.
+
+---
+
+![figure6.png](images/figure6.png)
+
+**Figura 5.** Tabla para cifrador Vigenere.
+
+---
+
+Si la palabra clave es más corta que el mensaje, entonces repetimos la palabra clave tantas veces como haga falta, pareando letras del mensaje con letras de la palabra clave como se hace en la Figura 6.
+
+---
+
+|     mensaje     | A | L | G | U | N | A | S |   | C | O | S | A | S |
+|-----------------|---|---|---|---|---|---|---|---|---|---|---|---|---|
+| clave           | M | E | N | O | R | M | E |   | N | O | R | M | E |
+| mensaje cifrado | M | P | T | I | E | M | W |   | P | C | J | M | W |
+
+
+**Figura 6.** Alineamiento del mensaje con la palabra clave y cifrado.
+
+---
+
+##Funciones que se utilizarán en esta experiencia de laboratorio:
+
+El programa que estarás modificando en la sesión de hoy utiliza los siguientes métodos de la clase `string`:
+
+* `length`: Devuelve el largo de un objeto de la clase `string`; esto es, `length` devuelve el número de caracteres que tiene el "string". Se utiliza escribiendo `.length()` después del nombre del objeto.
+
+* `push_back`: Este método recibe un caracter como argumento y lo añade al final del “string”. Se utiliza escribiendo `.push_back(elCaracter)` después del nombre del “string”. Por ejemplo, para añadir el caracter 'a' a  un objeto de la clase `string` llamado  `cadena`, escribimos `cadena.push_back('a')`.
+
+También utilizaremos las funciones:
+
+* `toupper`: Esta función recibe como argumento un caracter y devuelve el caracter en mayúscula. Por ejemplo, para cambiar el caracter 'a' a mayúscula se utiliza `toupper('a')`.
+
+* `isalpha`: Esta función recibe como argumento un caracter y devuelve un valor distinto de cero (`true`) si el caracter es una letra y cero (`false`) si el caracter no es una letra. Por ejemplo, `isalpha(3)` devuelve "false" pero `isalpha(‘F’)` devuelve `true`.
+
+
+---
+
+---
+
+
+##Sesión de laboratorio:
+
+En esta experiencia de laboratorio completarás una aplicación para cifrar un mensaje de texto utilizando el cifrado Vigenere. Para simplificar el código, la clave y el mensaje deben consistir solo de letras y tu programa debe cambiar todas las letras del mensaje y la clave a mayúsculas.
+
+###Ejercicio 1: Cifrador con clave y mensaje del mismo largo (solo letras)
+
+En este ejercicio completarás la aplicación para cifrar un mensaje de texto, 
+que solo contiene letras, utilizando una palabra clave que también consiste solo de letras y que tiene el mismo largo del mensaje. 
+
+####Instrucciones
+
+1. Carga a Qt el proyecto `VigenereCypher`  haciendo doble "click" en el archivo `VigenereCypher.pro` en el directorio `Documents/eip/Repetitions-VigenereCypher` de tu computadora. También puedes ir a `http://bitbucket.org/eip-uprrp/repetitions-vigenerecypher` para descargar la carpeta `Repetitions-VigenereCypher` a tu computadora.
+ 
+2. Estarás añadiendo código en el archivo `cypher.cpp`. En este archivo, la función `cypher` recibe un mensaje y una clave del mismo largo y consistentes solo de letras, y devuelve el mensaje cifrado por el cifrador Vigenere. Tu tarea es completar la función de cifrado.
+ 
+    El código debe verificar si el mensaje y la clave consisten solo de letras y tienen el mismo largo; si esto no ocurre, el mensaje cifrado será (literalmente) `"MENSAJE O CLAVE INVALIDO"`. El programa debe implementar el cifrador Vigenere para ir cifrando cada letra del mensaje utilizando la clave.  Solo debes utilizar las funciones mencionadas en la sección anterior. Para simplificar el código tu programa debe cambiar todas las letras del mensaje y la clave a mayúsculas.
+
+3. Al terminar tu código, ve a la función `main` y descomenta la invocación a la función de prueba unitaria  `test_cypher1`. Esa función realiza varias invocaciones a la función `cypher` para validar si sus resultados son correctos. Tu función `cypher` debe pasar todas las pruebas antes de continuar con la próxima parte de este laboratorio. 
+
+
+###Ejercicio 2: Cifrador con clave y mensaje de largos arbitrarios 
+
+En este ejercicio modificarás el código de la función `cypher` que creaste para el Ejercicio 1 de modo que la aplicación ahora pueda cifrar cualquier mensaje  utilizando una palabra clave que consista solo de letras pero que tenga cualquier largo. 
+
+####Instrucciones
+
+1. Escribe el código de la función `cypher` para que reciba un mensaje y una clave y devuelva el mensaje cifrado por el cifrador Vigenere. En esta ocasión, el mensaje y la clave pueden tener cualquier largo y el mensaje puede tener cualquier caracter (la clave solo puede tener letras). 
+
+El programa debe implementar el cifrador Vigenere para ir cifrando cada caracter del mensaje utilizando las letras de la clave.  Para simplificar el código, tu programa debe cambiar todas las letras a mayúsculas. Si alguno de los caracteres del mensaje no es una letra, el cifrador no lo cambia, como se muestra en la Figura 7. Si alguno de los caracteres de la clave no es una letra, el mensaje cifrado será "CLAVE INVALIDA". Solo debes utilizar las funciones mencionadas en la sección anterior.
+
+    ---
+
+    |     mensaje     | A | L | & | U | N | A | $ |   | C | O | S | A | S |
+    |-----------------|---|---|---|---|---|---|---|---|---|---|---|---|---|
+    | clave           | M | E | N | O | R | M | E |   | N | O | R | M | E |
+    | mensaje cifrado | M | P | & | I | E | M | $ |   | P | C | J | M | W |
+
+
+    **Figura 7.** Ejemplo de mensaje y clave con largo distinto y símbolos en el mensaje.
+
+    ---
+
+2. Al terminar tu código, ve a la función `main` y descomenta la invocación a la función de prueba unitaria `test_cypher2` para que verifiques tu programa.
+
+---
+
+---
+
+##Entrega
+
+Utiliza "Entrega" en Moodle para entregar el archivo `cypher.cpp` que contiene la función `cypher` que creaste en el Ejercicio 2. Recuerda utilizar buenas prácticas de programación, incluir el nombre de los programadores y documentar tu programa.
+
+---
+
+---
+
+##Referencias
+
+http://www.nctm.org/uploadedImages/Classroom_Resources/Lesson_Plans/
+
+---
+
+---
+
+-----
+
+[English](#markdown-header-repetition-structures-vigenere-cipher) | [Español](#markdown-header-estructuras-de-repeticion-cifrado-vigenere)
+
+# Repetition Structures - Vigenere Cipher
+
+![](http://demo05.cloudimage.io/s/resize/215/i.imgur.com/DYSdjlN.png)
+![](http://demo05.cloudimage.io/s/resize/215/i.imgur.com/TEk9bMp.png)
+![](http://demo05.cloudimage.io/s/resize/215/i.imgur.com/3PV1IiK.png)
+
+
+
+One of the advantages of using computer programs is that we can easily implement repetitive tasks. Structures such as the `for`, `while`, and `do-while` allow us to repeat a block of instructions as many times as needed. In this lab experience you will use `for` loops to complete a simple ciphering application.
+
+##Objectives:
+
+1. Apply repetition structures to cipher a plain-text message.
+2. Practice character arithmetic.
+
+
+##Pre-Lab:
+
+Before coming to the lab session you should have:
+
+1. Reviewed basic concepts related to repetition structures.
+
+2. Reviewed the string class in C++. In particular, how to create string objects and the `length`, `toupper` and `push_back` methods.  Also review the `isalpha` function and character arithmetic.
+
+3. Watched Khan Academy’s "Ceasar Cypher" video at https://www.youtube.com/watch?v=sMOZf4GN3oc .
+
+4. Watched Khan Academy’s "Vigenere Cypher" video at https://www.youtube.com/watch?v=9zASwVoshiM .
+
+5. Studied the concepts and instructions for the laboratory session.
+
+6. Taken the Pre-Lab quiz available through the course’s Moodle portal.
+
+---
+
+---
+
+##Criptography
+
+Cryptography is the area of knowledge that studies the theory and methods that are used for protecting information so that non-authorized persons cannot understand it. A *cryptographic system* is a system that transforms a *cleartext message* (a message that is understandable to humans) to a *cyphered* text (text that is unintelligible to unauthorized persons).  Authorized persons can *decypher* the *cyphered* text to obtain the original cleartext.
+
+###The Ceasar Cypher
+
+The Caesar Cypher is a substitution encryption technique that is said to have been used by Julius Caesar (100 BC - 44 BC), the Roman political and military leader, to communicate with his generals. To encrypt a message using the Caesar Cipher each letter of the cleartext message is substituted by the letter found a given number of positions ahead in the alphabet. You may think of this as a shift of the letter in the alphabet. Figure 1 illustrates a shift of 3 spaces within the alphabet. For instance, letter ‘B’ would be substituted by letter ‘E’.
+
+---
+
+![figure1.png](images/figure1.png)
+
+**Figure 1.** Caesar Cypher with shift of three.
+
+---
+
+**Example 1.** With a shift of three, the word “ARROZ” is ciphered as “DUURC”. Observe that, with the shift of 3, letter ‘Z’ is ciphered as letter ‘C’. Any shift that takes us beyond letter ‘Z’ starts again at letter ‘A’. This is called cyclic shift. Figure 2 illustrates a circular shift of eight positions.
+
+---
+
+![figure2.png](images/figure2.png)
+
+**Figure 2.** A Caesar cipher disk showing a shift of 8 positions.
+
+---
+
+###Using the modulo operator
+
+Modular addition is essential for implementing ciphering systems in programming. Let’s say that you map every letter of the (English) alphabet to a number between 0 to 25 (‘A’ is 0, ‘B’ is 1, .., ‘Z’ is 25). To Caesar cipher a letter we convert the letter to its corresponding number in the range [0,25], then add the displacement. We then apply the modulo 26 operation to the total. The letter that corresponds to the result after the modulo is the ciphered letter. The effect of the circular shift is achieved by using the modulo 26 operation because it converts the result of the addition to an integer in the range [0,25]. For instance, if we were to shift the letter ‘Z’ by three positions, this would be performed by adding ( 25 + 3 ) % 26 which equals 2, whose corresponding letter is ‘C’.  
+
+To convert an uppercase letter to a number in the [0,25] range we can apply our knowledge of the ASCII code. The code for the uppercase letters is in the range [65,90]  (‘A’ is 65, ‘Z’ is 90). Thus, to convert an uppercase case to a number in the range [0,25], a simple subtraction by 65 does the trick (i.e. `’A’ - 65 = 0`, `’Z’ - 65 = 25`).  Observe that to go from the [0,25] range to the ASCII code of its corresponding uppercase character we simply add 65 to the number. For instance, number 3 corresponds to the letter whose ASCII code is $3 + 65 = 68$, i.e. letter ‘D’.  
+
+Figure 3 shows the pseudocode of an algorithm for the Caesar cipher. Each letter ‘c’ in the cleartext message is converted to a number in the range [0,25]  (by subtracting ‘A’). The displacement d is then added to the number (modulo 26) . Lastly, the result of the modular addition is converted back to its corresponding letter by adding the ASCII code of ‘A’. 
+
+---
+
+```cpp
+    Input: msg: a string of the cleartext message, d: the displacement
+    Output: Caesar ciphered message 
+
+    1. cypheredText = ""
+    2. for each character c in msg:
+           c = ascii(c) - ascii('A')  # map c from [‘A’,’Z’] to [0,25]
+           c = ( c + d ) % 26         # circular shift c by d positions
+           c = ascii(c) + ascii('A')  # map c from [0,25] to [‘A’,’Z’]
+           cypheredText.append(c) 
+    3. return cypheredText 
+```
+
+**Figure 3.** Pseudocode for a Caesar cipher algorithm.
+
+---
+
+The Caesar cipher is considered a weak encryption mechanism because it can easily be deciphered by using frequency analysis on the ciphered message. For example, we can use the fact that letter ‘e’ is the most frequent letter in most texts. If we find the most frequent letter in a ciphered text it very probably corresponds to the letter that was substituted by ‘e’. With this information we can compute the displacement that was used and decipher the rest of the message.
+
+PONER PREGUNTAS DIAGNOSTICAS AQUí
+
+###The Vigenere Cypher 
+
+A main weakness of the Caesar cipher is that every letter in the cleartext message is shifted by the same number of positions. The Vignere cipher is a somewhat stronger encryption method because the shift used on each letter is not constant. Whereas the Caesar cipher receives as input a cleartext message and a displacement, the Vignere receives the cleartext message and **keyword**. For now, lets assume that the keyword and the cleartext message have the same length. The Vignere cipher uses the keyword to determine the shift that will be applied to each letter of the cleartext message, i.e. the first letter of the keyword determines the shift number for the first letter of the message and so forth. 
+
+**Example 2.** Suppose that the cleartext is “PET” and the keyword is “BED”. Each letter in the **keyword** determines the shift amount of the corresponding letter in the cleartext: letter ‘A’ specifies a shift of 0, ‘B’ is a shift of 1, and so on.  Thus, the ‘B’ in the keyword “BED” states that we shall shift the first letter of the cleartext by 1, the ‘E’ states that we will shift second the letter by 4 and the ‘D’ states that we will shift the last letter by 3.
+
+---
+
+| cleartext       | P | E | T |
+|-----------------|---|---|---|
+| keyword         | B | E | D |
+|-----------------|---|---|---|
+| ciphered text  | Q | I | X |
+
+**Figure 4.** Letter ‘P’ in the cleartext is shifted by 1 to ‘Q’  as indicated by the corresponding letter in the keyword (B).   Letter ‘E’ in the cleartext is shifted by 4 to ‘I’  as indicated by the corresponding letter in the keyword (E).   Letter ‘T’ in the cleartext is shifted by 3 to ‘X’  as indicated by the corresponding letter in the keyword (D).  
+
+
+---
+
+Figure 5 shows a table that can be used to determine the Vigenere-ciphered letter, given the cleartext and keyword letter.  Notice that each row contains the entire alphabet shifted by the amount specified by the letter at the beginning of the row.
+ 
+---
+
+![figure6.png](images/figure6.png)
+
+**Figure 5.** Table for the Vigenere-cipher. The shaded row and column illustrate how to cipher the letter ‘R’ with key letter ‘M’.
+
+---
+
+If the keyword is shorter than the cleartext, the Vigenere cipher simply repeats the keyword as many times as needed to account for all the letters of the cleartext. Figure 6, illustrates the keyword and cleartext pairing for an example. 
+
+---
+
+| cleartext       | P | R | O | G | R | A | M |   | T | H | I | S |
+|-----------------|---|---|---|---|---|---|---|---|---|---|---|---|
+| keyword         | S | H | O | R | T | S | H |   | O | R | T | S |
+|-----------------|---|---|---|---|---|---|---|---|---|---|---|---|
+| ciphered text   | H | Y | C | X | K | S | T |   | H | Y | B | K |
+
+
+**Figure 6.** Alignment of a cleartext with a shorter keyword and the resulting cipher.
+
+---
+
+##Functions that will be used in this laboratory experience: 
+
+The program that you will be modifying in today’s experience uses the following methods of the `string` class:
+
+* `length`: Returns the length of a `string` object, i.e. the number of characters in the string (including invisible characters such as the space and end-line).  To invoke the `length` method of string object write `.length()` after the object’s name, e.g. `msg.length()`.
+
+* `push_back(char c)`: adds the character passed as argument to the end of the string. For example, the instruction `msg.push_back(‘a’)` adds character `a` to the end of an object called `msg`. 
+
+We will also use the following functions:
+
+* `char toupper(char c)`: given a character as an argument, this function returns the character in uppercase. For example, `toupper(‘b’)` returns `B`. 
+
+* `int isalpha(char c)`: Given a character as an argument, this function returns a non-zero value when the character is a letter. Otherwise it returns 0. As you know, C++ interprets non-zero values as `true` and zero as `false`. Thus, for example, the call `isalpha(‘3’)` returns `false`. The call returns `isalpha(‘f’)` returns `true`.
+
+
+---
+
+---
+
+
+##Laboratory session:
+
+You will be completing an application to cipher a message using the Vigenere technique. To simplify coding, the keyword and cleartext must consist exclusively of letters. Furthermore, your program must change both the cleartext and keyword to uppercase before ciphering. 
+
+###Exercise 1: Keyword and cleartext of the same length
+
+In this exercise you will implement a function that given a cleartext and keyword of equal length returns the cipher message. 
+
+####Instructions
+
+1. Load the Qt project called `VigenereCypher` by double-clicking on the `VigenereCypher.pro` file in the `Documents/eip/Repetitions-VigenereCypher` folder of your computer. Alternatively you may clone the git repository `http://bitbucket.org/eip-uprrp/repetitions-vigenerecypher` to download the `Repetitions-VigenereCypher` folder to your computer.
+ 
+2. You will be writing your code in the `cypher.cpp` file. In this file, the `cypher` function receives a message and a keyword of equal length and that consist exclusively of letters, and returns the Vigenere-ciphered message. Your task is to finish the implementation of the `cypher` function.
+     
+    Using the methods and functions discussed earlier, your implementation must verify if the message and keyword consist exclusively of letters and are of equal length. If that is not the case, the ciphered message must be (literally) `"MENSAJE O CLAVE INVALIDO"`. Remember that your program must change both the cleartext and keyword to upper-case letters before ciphering.
+
+3. After you implement the `cypher` function, go to the `main` function and uncomment the line that invokes `test_cypher1`. The `test_cypher1` function is a unit test for the `cypher` function. It calls the `cypher` function with various arguments to verify if it returns correct results. If any of the results is incorrect the program stops and reports the test case that failed. You will not see the application’s graphical user interface until the unit test passes all validations.  Once you see the graphical user interface you may continue onto the next part of this lab experience.
+
+
+###Exercise 2: Keyword and cleartext of arbitrary lengths
+
+In this exercise you will modify the code for the cypher function from Exercise 1 so that the application can now cipher a message using a keyword of arbitrary length. 
+
+####Instructions
+
+1. Modify the implementation of the `cypher` function so that it can cipher a message with a keyword of any (non-zero) length. For this exercise the message may contain any character (including non alphabetical characters). The keyword must consist exclusively of letters. 
+
+    Whenever the character in the cleartext is not a letter it will not be ciphered, as seen in Figure 7. If any character in the keyword is not a letter, the ciphered message will be (literally) `”CLAVE INVALIDA”`. 
+
+    ---
+
+| cleartext       | P | R | @ | G | R | * | M |   | T | 8 | I | S |
+|-----------------|---|---|---|---|---|---|---|---|---|---|---|---|
+| keyword         | S | H | O | R | T | S | H |   | O | R | T | S |
+|-----------------|---|---|---|---|---|---|---|---|---|---|---|---|
+| ciphered text   | H | Y | @ | X | K | * | T |   | H | 8 | B | K |
+
+
+    **Figure 7.** Example Vignere cipher of the cleartext `“PR@GR*M T8IS”` using the keyword `SHORT”`. 
+
+    ---
+
+
+2. After you implement the `cypher` function, modify the `main` function so that line that invokes `test_cypher2` is uncommented. Once again, you will not see the app’s graphical user interface until the `test_cypher2` verifications.
+ 
+---
+
+---
+
+##Deliverables
+
+
+Use "Deliverables" in Moodle to upload the `cypher.cpp` file that contains the `cypher` function that you created in Exercise 2.  Remember to use good programming techniques, include the names of the programmers involved, and to document your program.
+
+
+---
+
+---
+
+##References
+
+http://www.nctm.org/uploadedImages/Classroom_Resources/Lesson_Plans/

VigenereCypher.pro

@@ -0,0 +1,21 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2014-07-15T13:19:49
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = CaesarCipher
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        mainwindow.cpp \
+    cypher.cpp
+
+HEADERS  += mainwindow.h
+
+FORMS    += mainwindow.ui

cypher.cpp

@@ -0,0 +1,116 @@
+#include <string>
+#include <cassert>
+#include <iostream>
+#include <QDebug>
+
+#include "cypher.h"
+
+using namespace std;
+
+///
+/// \brief cypher- Function that recieves the plaintext message
+/// and the keyword provided by the user and encrypts the message
+///
+/// \param message- Message to be encrypted provided by the user
+///
+/// \param key- keyword that the user provides, used to encrypt plain text
+///
+///
+
+
+string cypher(string message, string key){
+   
+    
+    // YOUR CODE HERE
+    
+    return cypheredMsg ;
+
+}
+
+
+
+
+
+void test_cypher1() {
+    string plainTextSt = "Erase";
+    string keySt = "torTu";
+    assert(decypher(cypher(plainTextSt, keySt), keySt) == "ERASE");
+    
+    plainTextSt = "ERAS";
+    keySt = "UPRR";
+    assert(decypher(cypher(plainTextSt, keySt), keySt) == "ERAS");
+
+    plainTextSt = "Largo";
+    keySt = "Maslargo";
+    assert(cypher(plainTextSt, keySt)== "MENSAJE O CLAVE INVALIDA");
+
+    plainTextSt = "L@rgo";
+    keySt = "Largo";
+    assert(cypher(plainTextSt, keySt) == "MENSAJE O CLAVE INVALIDA");
+    
+    cout << "Passed unit test!" << endl;
+}
+
+
+void test_cypher2() {
+    string plainTextSt = "Erase una vez";
+    string keySt = "UPRRPCC@M";
+    assert(cypher(plainTextSt, keySt) == "MENSAJE O CLAVE INVALIDA");
+
+    plainTextSt = "Erase una vez";
+    keySt = "torTuga";
+    assert(decypher(cypher(plainTextSt, keySt), keySt) == "ERASE UNA VEZ");
+
+    plainTextSt = "Er@se una ve$";
+    keySt = "UPRRPCCOM";
+    assert(decypher(cypher(plainTextSt, keySt), keySt) == "ER@SE UNA VE$");
+
+    cout << "Passed unit test!" << endl;
+}
+
+
+
+///
+/// \brief decypherCyclic - Function that deciphers Vigenere ciphertext,
+/// receives the ciphertext and the keyword and returns the plaintext.
+/// Works for messages and keys of different lengths.
+///
+/// \param message- ciphertext to be deciphered, provided by the user
+///
+/// \param key- keyword provided by the user, used to decipher the message
+///
+/// This function is obfuscated on purpose to disencourage students from trying to
+/// copy the cypher function from it.
+
+#define FIUHED if(
+#define PIOIWE isalpha(
+#define z341 string
+#define u83 return
+#define H_H_H int
+#define if_ toupper
+#define retur length()
+#define q else
+z341 decypher(string a, string r){
+    z341 f = "";
+    H_H_H    j = 0;
+    char   d, c;
+
+    for(H_H_H i=0 ; i < (H_H_H) a.retur; i++){
+
+        FIUHED PIOIWE r[j])){
+FIUHED PIOIWE a[i])){
+c=if_(a[i]) -'A' ;d
+=  if_(r[j])
+- 'A';
+c = (
+c + 26 - d)
+% 26 + 'A' ;
+}
+            q c = a[i];
+j = (j + 1) % r.retur ;
+f.push_back(c);} else { u83 "MENSAJE O CLAVE INVALIDA";
+        }
+    }
+
+    u83 f ;
+}

cypher.h

@@ -0,0 +1,12 @@
+#ifndef CYPHER_H
+#define CYPHER_H
+
+#include <string>
+using namespace std;
+
+string cypher(string, string) ;
+string decypher(string message, string key);
+
+
+#endif // CYPHER_H
+

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+<table class="directory">
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+  <tr><td class="entry"><a class="el" href="class_main_window.html#a5cd75410c0e61895337558eb291fe757">on_DecodeButton_clicked</a>()</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"><span class="mlabel">private</span><span class="mlabel">slot</span></td></tr>
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+ <div class="center">
+  <img src="class_main_window.png" usemap="#MainWindow_map" alt=""/>
+  <map id="MainWindow_map" name="MainWindow_map">
+</map>
+ </div></div>
+<table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
+Public Member Functions</h2></td></tr>
+<tr class="memitem:a8b244be8b7b7db1b08de2a2acb9409db"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#a8b244be8b7b7db1b08de2a2acb9409db">MainWindow</a> (QWidget *parent=0)</td></tr>
+<tr class="memdesc:a8b244be8b7b7db1b08de2a2acb9409db"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function which sets up the <a class="el" href="class_main_window.html">MainWindow</a>.  <a href="#a8b244be8b7b7db1b08de2a2acb9409db">More...</a><br /></td></tr>
+<tr class="separator:a8b244be8b7b7db1b08de2a2acb9409db"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ae98d00a93bc118200eeef9f9bba1dba7"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#ae98d00a93bc118200eeef9f9bba1dba7">~MainWindow</a> ()</td></tr>
+<tr class="memdesc:ae98d00a93bc118200eeef9f9bba1dba7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default destructor.  <a href="#ae98d00a93bc118200eeef9f9bba1dba7">More...</a><br /></td></tr>
+<tr class="separator:ae98d00a93bc118200eeef9f9bba1dba7"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-slots"></a>
+Private Slots</h2></td></tr>
+<tr class="memitem:aeafcd6b6d3fb18aae51bea1492d04012"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aeafcd6b6d3fb18aae51bea1492d04012"></a>
+void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#aeafcd6b6d3fb18aae51bea1492d04012">on_EncodeButton_clicked</a> ()</td></tr>
+<tr class="memdesc:aeafcd6b6d3fb18aae51bea1492d04012"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that is called when the encode button is pressed. The message and the keyword that the user provides are placed into each variable accordingly, then the cypher function is called using these variables. <br /></td></tr>
+<tr class="separator:aeafcd6b6d3fb18aae51bea1492d04012"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a5cd75410c0e61895337558eb291fe757"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5cd75410c0e61895337558eb291fe757"></a>
+void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#a5cd75410c0e61895337558eb291fe757">on_DecodeButton_clicked</a> ()</td></tr>
+<tr class="memdesc:a5cd75410c0e61895337558eb291fe757"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that is called when the decode button is pressed. The ciphertext and the keyword that the user provides are placed into each variable accordingly then the decypher function is called using these variables. <br /></td></tr>
+<tr class="separator:a5cd75410c0e61895337558eb291fe757"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-attribs"></a>
+Private Attributes</h2></td></tr>
+<tr class="memitem:a35466a70ed47252a0191168126a352a5"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a35466a70ed47252a0191168126a352a5"></a>
+Ui::MainWindow *&#160;</td><td class="memItemRight" valign="bottom"><b>ui</b></td></tr>
+<tr class="separator:a35466a70ed47252a0191168126a352a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
+<a class="anchor" id="a8b244be8b7b7db1b08de2a2acb9409db"></a>
+<div class="memitem">
+<div class="memproto">
+<table class="mlabels">
+  <tr>
+  <td class="mlabels-left">
+      <table class="memname">
+        <tr>
+          <td class="memname">MainWindow::MainWindow </td>
+          <td>(</td>
+          <td class="paramtype">QWidget *&#160;</td>
+          <td class="paramname"><em>parent</em> = <code>0</code></td><td>)</td>
+          <td></td>
+        </tr>
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+  <td class="mlabels-right">
+<span class="mlabels"><span class="mlabel">explicit</span></span>  </td>
+  </tr>
+</table>
+</div><div class="memdoc">
+
+<p>Function which sets up the <a class="el" href="class_main_window.html">MainWindow</a>. </p>
+<p>Constructor. </p>
+
+</div>
+</div>
+<a class="anchor" id="ae98d00a93bc118200eeef9f9bba1dba7"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">MainWindow::~MainWindow </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Default destructor. </p>
+<p>Destructor. </p>
+
+</div>
+</div>
+<hr/>The documentation for this class was generated from the following files:<ul>
+<li><a class="el" href="mainwindow_8h_source.html">mainwindow.h</a></li>
+<li>mainwindow.cpp</li>
+</ul>
+</div><!-- contents -->
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+Generated on Thu Jun 4 2015 09:11:48 for My Project by &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.9.1
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+</td><td></td></tr>
+<tr><td></td></tr>
+<tr><td valign="top"><a class="el" href="class_main_window.html">MainWindow</a>&#160;&#160;&#160;</td><td></td></tr>
+<tr><td></td><td></td></tr>
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+<img class="footer" src="doxygen.png" alt="doxygen"/>
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doc/en/html/cypher_8cpp.html

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+   <div id="projectname">My Project
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+<!-- end header part -->
+<!-- Generated by Doxygen 1.8.9.1 -->
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+  <div id="navrow1" class="tabs">
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+      <li><a href="files.html"><span>File&#160;List</span></a></li>
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+  <div class="summary">
+<a href="#func-members">Functions</a>  </div>
+  <div class="headertitle">
+<div class="title">cypher.cpp File Reference</div>  </div>
+</div><!--header-->
+<div class="contents">
+<div class="textblock"><code>#include &lt;string&gt;</code><br />
+<code>#include &lt;cassert&gt;</code><br />
+<code>#include &lt;iostream&gt;</code><br />
+<code>#include &lt;QDebug&gt;</code><br />
+<code>#include &quot;cypher.h&quot;</code><br />
+</div><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
+Functions</h2></td></tr>
+<tr class="memitem:aee818f9db10b153b3067af5365a53806"><td class="memItemLeft" align="right" valign="top">string&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="cypher_8cpp.html#aee818f9db10b153b3067af5365a53806">cypher</a> (string message, string key)</td></tr>
+<tr class="memdesc:aee818f9db10b153b3067af5365a53806"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that recives the plaintext message and the keyword provided by the user and encrypts the message.  <a href="#aee818f9db10b153b3067af5365a53806">More...</a><br /></td></tr>
+<tr class="separator:aee818f9db10b153b3067af5365a53806"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:af9f89bd41fe6c015e6589a0677e1d108"><td class="memItemLeft" align="right" valign="top">string&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="cypher_8cpp.html#af9f89bd41fe6c015e6589a0677e1d108">decypher</a> (string m, string k)</td></tr>
+<tr class="memdesc:af9f89bd41fe6c015e6589a0677e1d108"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function that deciphers Vigenere ciphertext, receives the ciphertext and the keyword and returns the plaintext.  <a href="#af9f89bd41fe6c015e6589a0677e1d108">More...</a><br /></td></tr>
+<tr class="separator:af9f89bd41fe6c015e6589a0677e1d108"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a56eea50b62dd8e9174463bce0b90d213"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a56eea50b62dd8e9174463bce0b90d213"></a>
+void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="cypher_8cpp.html#a56eea50b62dd8e9174463bce0b90d213">test_cypher</a> ()</td></tr>
+<tr class="memdesc:a56eea50b62dd8e9174463bce0b90d213"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function to unit text the cypher function. <br /></td></tr>
+<tr class="separator:a56eea50b62dd8e9174463bce0b90d213"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<h2 class="groupheader">Function Documentation</h2>
+<a class="anchor" id="aee818f9db10b153b3067af5365a53806"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">string cypher </td>
+          <td>(</td>
+          <td class="paramtype">string&#160;</td>
+          <td class="paramname"><em>message</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">string&#160;</td>
+          <td class="paramname"><em>key</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Function that recives the plaintext message and the keyword provided by the user and encrypts the message. </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">message</td><td>Message to be encrypted provided by the user </td></tr>
+    <tr><td class="paramname">key</td><td>keyword that the user provides, used to encrypt plain text </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="af9f89bd41fe6c015e6589a0677e1d108"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">string decypher </td>
+          <td>(</td>
+          <td class="paramtype">string&#160;</td>
+          <td class="paramname"><em>message</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">string&#160;</td>
+          <td class="paramname"><em>key</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Function that deciphers Vigenere ciphertext, receives the ciphertext and the keyword and returns the plaintext. </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">message</td><td>Message to be encrypted provided by the user </td></tr>
+    <tr><td class="paramname">key</td><td>keyword that the user provides, used to encrypt plain text </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+</div><!-- contents -->
+<!-- start footer part -->
+<hr class="footer"/><address class="footer"><small>
+Generated on Thu Jun 4 2015 09:11:48 for My Project by &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.9.1
+</small></address>
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+</html>

doc/en/html/cypher_8h_source.html

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+<div class="textblock">Here is a list of all documented files with brief descriptions:</div><div class="directory">
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+</div><!-- directory -->
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+<!-- start footer part -->
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+Generated on Thu Jun 4 2015 09:11:48 for My Project by &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.9.1
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+Generated on Thu Jun 4 2015 09:11:48 for My Project by &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.9.1
+</small></address>
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doc/en/html/functions_func.html

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+      <li class="current"><a href="annotated.html"><span>Classes</span></a></li>
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+<img class="footer" src="doxygen.png" alt="doxygen"/>
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doc/en/html/search/functions_1.html

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doc/en/html/search/functions_2.html

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doc/en/html/search/functions_4.html

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doc/en/html/search/functions_5.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html><head><title></title>
+<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
+<meta name="generator" content="Doxygen 1.8.9.1"/>
+<link rel="stylesheet" type="text/css" href="search.css"/>
+<script type="text/javascript" src="functions_5.js"></script>
+<script type="text/javascript" src="search.js"></script>
+</head>
+<body class="SRPage">
+<div id="SRIndex">
+<div class="SRStatus" id="Loading">Loading...</div>
+<div id="SRResults"></div>
+<script type="text/javascript"><!--
+createResults();
+--></script>
+<div class="SRStatus" id="Searching">Searching...</div>
+<div class="SRStatus" id="NoMatches">No Matches</div>
+<script type="text/javascript"><!--
+document.getElementById("Loading").style.display="none";
+document.getElementById("NoMatches").style.display="none";
+var searchResults = new SearchResults("searchResults");
+searchResults.Search();
+--></script>
+</div>
+</body>
+</html>

doc/en/html/search/functions_5.js

@@ -0,0 +1,4 @@
+var searchData=
+[
+  ['_7emainwindow',['~MainWindow',['../class_main_window.html#ae98d00a93bc118200eeef9f9bba1dba7',1,'MainWindow']]]
+];

doc/en/html/search/nomatches.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html><head><title></title>
+<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
+<link rel="stylesheet" type="text/css" href="search.css"/>
+<script type="text/javascript" src="search.js"></script>
+</head>
+<body class="SRPage">
+<div id="SRIndex">
+<div class="SRStatus" id="NoMatches">No Matches</div>
+</div>
+</body>
+</html>

doc/en/html/search/search.css

@@ -0,0 +1,271 @@
+/*---------------- Search Box */
+
+#FSearchBox {
+    float: left;
+}
+
+#MSearchBox {
+    white-space : nowrap;
+    position: absolute;
+    float: none;
+    display: inline;
+    margin-top: 8px;
+    right: 0px;
+    width: 170px;
+    z-index: 102;
+    background-color: white;
+}
+
+#MSearchBox .left
+{
+    display:block;
+    position:absolute;
+    left:10px;
+    width:20px;
+    height:19px;
+    background:url('search_l.png') no-repeat;
+    background-position:right;
+}
+
+#MSearchSelect {
+    display:block;
+    position:absolute;
+    width:20px;
+    height:19px;
+}
+
+.left #MSearchSelect {
+    left:4px;
+}
+
+.right #MSearchSelect {
+    right:5px;
+}
+
+#MSearchField {
+    display:block;
+    position:absolute;
+    height:19px;
+    background:url('search_m.png') repeat-x;
+    border:none;
+    width:111px;
+    margin-left:20px;
+    padding-left:4px;
+    color: #909090;
+    outline: none;
+    font: 9pt Arial, Verdana, sans-serif;
+}
+
+#FSearchBox #MSearchField {
+    margin-left:15px;
+}
+
+#MSearchBox .right {
+    display:block;
+    position:absolute;
+    right:10px;
+    top:0px;
+    width:20px;
+    height:19px;
+    background:url('search_r.png') no-repeat;
+    background-position:left;
+}
+
+#MSearchClose {
+    display: none;
+    position: absolute;
+    top: 4px;
+    background : none;
+    border: none;
+    margin: 0px 4px 0px 0px;
+    padding: 0px 0px;
+    outline: none;
+}
+
+.left #MSearchClose {
+    left: 6px;
+}
+
+.right #MSearchClose {
+    right: 2px;
+}
+
+.MSearchBoxActive #MSearchField {
+    color: #000000;
+}
+
+/*---------------- Search filter selection */
+
+#MSearchSelectWindow {
+    display: none;
+    position: absolute;
+    left: 0; top: 0;
+    border: 1px solid #90A5CE;
+    background-color: #F9FAFC;
+    z-index: 1;
+    padding-top: 4px;
+    padding-bottom: 4px;
+    -moz-border-radius: 4px;
+    -webkit-border-top-left-radius: 4px;
+    -webkit-border-top-right-radius: 4px;
+    -webkit-border-bottom-left-radius: 4px;
+    -webkit-border-bottom-right-radius: 4px;
+    -webkit-box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.15);
+}
+
+.SelectItem {
+    font: 8pt Arial, Verdana, sans-serif;
+    padding-left:  2px;
+    padding-right: 12px;
+    border: 0px;
+}
+
+span.SelectionMark {
+    margin-right: 4px;
+    font-family: monospace;
+    outline-style: none;
+    text-decoration: none;
+}
+
+a.SelectItem {
+    display: block;
+    outline-style: none;
+    color: #000000; 
+    text-decoration: none;
+    padding-left:   6px;
+    padding-right: 12px;
+}
+
+a.SelectItem:focus,
+a.SelectItem:active {
+    color: #000000; 
+    outline-style: none;
+    text-decoration: none;
+}
+
+a.SelectItem:hover {
+    color: #FFFFFF;
+    background-color: #3D578C;
+    outline-style: none;
+    text-decoration: none;
+    cursor: pointer;
+    display: block;
+}
+
+/*---------------- Search results window */
+
+iframe#MSearchResults {
+    width: 60ex;
+    height: 15em;
+}
+
+#MSearchResultsWindow {
+    display: none;
+    position: absolute;
+    left: 0; top: 0;
+    border: 1px solid #000;
+    background-color: #EEF1F7;
+}
+
+/* ----------------------------------- */
+
+
+#SRIndex {
+    clear:both; 
+    padding-bottom: 15px;
+}
+
+.SREntry {
+    font-size: 10pt;
+    padding-left: 1ex;
+}
+
+.SRPage .SREntry {
+    font-size: 8pt;
+    padding: 1px 5px;
+}
+
+body.SRPage {
+    margin: 5px 2px;
+}
+
+.SRChildren {
+    padding-left: 3ex; padding-bottom: .5em 
+}
+
+.SRPage .SRChildren {
+    display: none;
+}
+
+.SRSymbol {
+    font-weight: bold; 
+    color: #425E97;
+    font-family: Arial, Verdana, sans-serif;
+    text-decoration: none;
+    outline: none;
+}
+
+a.SRScope {
+    display: block;
+    color: #425E97; 
+    font-family: Arial, Verdana, sans-serif;
+    text-decoration: none;
+    outline: none;
+}
+
+a.SRSymbol:focus, a.SRSymbol:active,
+a.SRScope:focus, a.SRScope:active {
+    text-decoration: underline;
+}
+
+span.SRScope {
+    padding-left: 4px;
+}
+
+.SRPage .SRStatus {
+    padding: 2px 5px;
+    font-size: 8pt;
+    font-style: italic;
+}
+
+.SRResult {
+    display: none;
+}
+
+DIV.searchresults {
+    margin-left: 10px;
+    margin-right: 10px;
+}
+
+/*---------------- External search page results */
+
+.searchresult {
+    background-color: #F0F3F8;
+}
+
+.pages b {
+   color: white;
+   padding: 5px 5px 3px 5px;
+   background-image: url("../tab_a.png");
+   background-repeat: repeat-x;
+   text-shadow: 0 1px 1px #000000;
+}
+
+.pages {
+    line-height: 17px;
+    margin-left: 4px;
+    text-decoration: none;
+}
+
+.hl {
+    font-weight: bold;
+}
+
+#searchresults {
+    margin-bottom: 20px;
+}
+
+.searchpages {
+    margin-top: 10px;
+}
+

doc/en/html/search/search.js

@@ -0,0 +1,791 @@
+function convertToId(search)
+{
+  var result = '';
+  for (i=0;i<search.length;i++)
+  {
+    var c = search.charAt(i);
+    var cn = c.charCodeAt(0);
+    if (c.match(/[a-z0-9\u0080-\uFFFF]/))
+    {
+      result+=c;
+    }
+    else if (cn<16)
+    {
+      result+="_0"+cn.toString(16);
+    }
+    else
+    {
+      result+="_"+cn.toString(16);
+    }
+  }
+  return result;
+}
+
+function getXPos(item)
+{
+  var x = 0;
+  if (item.offsetWidth)
+  {
+    while (item && item!=document.body)
+    {
+      x   += item.offsetLeft;
+      item = item.offsetParent;
+    }
+  }
+  return x;
+}
+
+function getYPos(item)
+{
+  var y = 0;
+  if (item.offsetWidth)
+  {
+     while (item && item!=document.body)
+     {
+       y   += item.offsetTop;
+       item = item.offsetParent;
+     }
+  }
+  return y;
+}
+
+/* A class handling everything associated with the search panel.
+
+   Parameters:
+   name - The name of the global variable that will be
+          storing this instance.  Is needed to be able to set timeouts.
+   resultPath - path to use for external files
+*/
+function SearchBox(name, resultsPath, inFrame, label)
+{
+  if (!name || !resultsPath) {  alert("Missing parameters to SearchBox."); }
+
+  // ---------- Instance variables
+  this.name                  = name;
+  this.resultsPath           = resultsPath;
+  this.keyTimeout            = 0;
+  this.keyTimeoutLength      = 500;
+  this.closeSelectionTimeout = 300;
+  this.lastSearchValue       = "";
+  this.lastResultsPage       = "";
+  this.hideTimeout           = 0;
+  this.searchIndex           = 0;
+  this.searchActive          = false;
+  this.insideFrame           = inFrame;
+  this.searchLabel           = label;
+
+  // ----------- DOM Elements
+
+  this.DOMSearchField = function()
+  {  return document.getElementById("MSearchField");  }
+
+  this.DOMSearchSelect = function()
+  {  return document.getElementById("MSearchSelect");  }
+
+  this.DOMSearchSelectWindow = function()
+  {  return document.getElementById("MSearchSelectWindow");  }
+
+  this.DOMPopupSearchResults = function()
+  {  return document.getElementById("MSearchResults");  }
+
+  this.DOMPopupSearchResultsWindow = function()
+  {  return document.getElementById("MSearchResultsWindow");  }
+
+  this.DOMSearchClose = function()
+  {  return document.getElementById("MSearchClose"); }
+
+  this.DOMSearchBox = function()
+  {  return document.getElementById("MSearchBox");  }
+
+  // ------------ Event Handlers
+
+  // Called when focus is added or removed from the search field.
+  this.OnSearchFieldFocus = function(isActive)
+  {
+    this.Activate(isActive);
+  }
+
+  this.OnSearchSelectShow = function()
+  {
+    var searchSelectWindow = this.DOMSearchSelectWindow();
+    var searchField        = this.DOMSearchSelect();
+
+    if (this.insideFrame)
+    {
+      var left = getXPos(searchField);
+      var top  = getYPos(searchField);
+      left += searchField.offsetWidth + 6;
+      top += searchField.offsetHeight;
+
+      // show search selection popup
+      searchSelectWindow.style.display='block';
+      left -= searchSelectWindow.offsetWidth;
+      searchSelectWindow.style.left =  left + 'px';
+      searchSelectWindow.style.top  =  top  + 'px';
+    }
+    else
+    {
+      var left = getXPos(searchField);
+      var top  = getYPos(searchField);
+      top += searchField.offsetHeight;
+
+      // show search selection popup
+      searchSelectWindow.style.display='block';
+      searchSelectWindow.style.left =  left + 'px';
+      searchSelectWindow.style.top  =  top  + 'px';
+    }
+
+    // stop selection hide timer
+    if (this.hideTimeout)
+    {
+      clearTimeout(this.hideTimeout);
+      this.hideTimeout=0;
+    }
+    return false; // to avoid "image drag" default event
+  }
+
+  this.OnSearchSelectHide = function()
+  {
+    this.hideTimeout = setTimeout(this.name +".CloseSelectionWindow()",
+                                  this.closeSelectionTimeout);
+  }
+
+  // Called when the content of the search field is changed.
+  this.OnSearchFieldChange = function(evt)
+  {
+    if (this.keyTimeout) // kill running timer
+    {
+      clearTimeout(this.keyTimeout);
+      this.keyTimeout = 0;
+    }
+
+    var e  = (evt) ? evt : window.event; // for IE
+    if (e.keyCode==40 || e.keyCode==13)
+    {
+      if (e.shiftKey==1)
+      {
+        this.OnSearchSelectShow();
+        var win=this.DOMSearchSelectWindow();
+        for (i=0;i<win.childNodes.length;i++)
+        {
+          var child = win.childNodes[i]; // get span within a
+          if (child.className=='SelectItem')
+          {
+            child.focus();
+            return;
+          }
+        }
+        return;
+      }
+      else if (window.frames.MSearchResults.searchResults)
+      {
+        var elem = window.frames.MSearchResults.searchResults.NavNext(0);
+        if (elem) elem.focus();
+      }
+    }
+    else if (e.keyCode==27) // Escape out of the search field
+    {
+      this.DOMSearchField().blur();
+      this.DOMPopupSearchResultsWindow().style.display = 'none';
+      this.DOMSearchClose().style.display = 'none';
+      this.lastSearchValue = '';
+      this.Activate(false);
+      return;
+    }
+
+    // strip whitespaces
+    var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
+
+    if (searchValue != this.lastSearchValue) // search value has changed
+    {
+      if (searchValue != "") // non-empty search
+      {
+        // set timer for search update
+        this.keyTimeout = setTimeout(this.name + '.Search()',
+                                     this.keyTimeoutLength);
+      }
+      else // empty search field
+      {
+        this.DOMPopupSearchResultsWindow().style.display = 'none';
+        this.DOMSearchClose().style.display = 'none';
+        this.lastSearchValue = '';
+      }
+    }
+  }
+
+  this.SelectItemCount = function(id)
+  {
+    var count=0;
+    var win=this.DOMSearchSelectWindow();
+    for (i=0;i<win.childNodes.length;i++)
+    {
+      var child = win.childNodes[i]; // get span within a
+      if (child.className=='SelectItem')
+      {
+        count++;
+      }
+    }
+    return count;
+  }
+
+  this.SelectItemSet = function(id)
+  {
+    var i,j=0;
+    var win=this.DOMSearchSelectWindow();
+    for (i=0;i<win.childNodes.length;i++)
+    {
+      var child = win.childNodes[i]; // get span within a
+      if (child.className=='SelectItem')
+      {
+        var node = child.firstChild;
+        if (j==id)
+        {
+          node.innerHTML='&#8226;';
+        }
+        else
+        {
+          node.innerHTML='&#160;';
+        }
+        j++;
+      }
+    }
+  }
+
+  // Called when an search filter selection is made.
+  // set item with index id as the active item
+  this.OnSelectItem = function(id)
+  {
+    this.searchIndex = id;
+    this.SelectItemSet(id);
+    var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
+    if (searchValue!="" && this.searchActive) // something was found -> do a search
+    {
+      this.Search();
+    }
+  }
+
+  this.OnSearchSelectKey = function(evt)
+  {
+    var e = (evt) ? evt : window.event; // for IE
+    if (e.keyCode==40 && this.searchIndex<this.SelectItemCount()) // Down
+    {
+      this.searchIndex++;
+      this.OnSelectItem(this.searchIndex);
+    }
+    else if (e.keyCode==38 && this.searchIndex>0) // Up
+    {
+      this.searchIndex--;
+      this.OnSelectItem(this.searchIndex);
+    }
+    else if (e.keyCode==13 || e.keyCode==27)
+    {
+      this.OnSelectItem(this.searchIndex);
+      this.CloseSelectionWindow();
+      this.DOMSearchField().focus();
+    }
+    return false;
+  }
+
+  // --------- Actions
+
+  // Closes the results window.
+  this.CloseResultsWindow = function()
+  {
+    this.DOMPopupSearchResultsWindow().style.display = 'none';
+    this.DOMSearchClose().style.display = 'none';
+    this.Activate(false);
+  }
+
+  this.CloseSelectionWindow = function()
+  {
+    this.DOMSearchSelectWindow().style.display = 'none';
+  }
+
+  // Performs a search.
+  this.Search = function()
+  {
+    this.keyTimeout = 0;
+
+    // strip leading whitespace
+    var searchValue = this.DOMSearchField().value.replace(/^ +/, "");
+
+    var code = searchValue.toLowerCase().charCodeAt(0);
+    var idxChar = searchValue.substr(0, 1).toLowerCase();
+    if ( 0xD800 <= code && code <= 0xDBFF && searchValue > 1) // surrogate pair
+    {
+      idxChar = searchValue.substr(0, 2);
+    }
+
+    var resultsPage;
+    var resultsPageWithSearch;
+    var hasResultsPage;
+
+    var idx = indexSectionsWithContent[this.searchIndex].indexOf(idxChar);
+    if (idx!=-1)
+    {
+       var hexCode=idx.toString(16);
+       resultsPage = this.resultsPath + '/' + indexSectionNames[this.searchIndex] + '_' + hexCode + '.html';
+       resultsPageWithSearch = resultsPage+'?'+escape(searchValue);
+       hasResultsPage = true;
+    }
+    else // nothing available for this search term
+    {
+       resultsPage = this.resultsPath + '/nomatches.html';
+       resultsPageWithSearch = resultsPage;
+       hasResultsPage = false;
+    }
+
+    window.frames.MSearchResults.location = resultsPageWithSearch;
+    var domPopupSearchResultsWindow = this.DOMPopupSearchResultsWindow();
+
+    if (domPopupSearchResultsWindow.style.display!='block')
+    {
+       var domSearchBox = this.DOMSearchBox();
+       this.DOMSearchClose().style.display = 'inline';
+       if (this.insideFrame)
+       {
+         var domPopupSearchResults = this.DOMPopupSearchResults();
+         domPopupSearchResultsWindow.style.position = 'relative';
+         domPopupSearchResultsWindow.style.display  = 'block';
+         var width = document.body.clientWidth - 8; // the -8 is for IE :-(
+         domPopupSearchResultsWindow.style.width    = width + 'px';
+         domPopupSearchResults.style.width          = width + 'px';
+       }
+       else
+       {
+         var domPopupSearchResults = this.DOMPopupSearchResults();
+         var left = getXPos(domSearchBox) + 150; // domSearchBox.offsetWidth;
+         var top  = getYPos(domSearchBox) + 20;  // domSearchBox.offsetHeight + 1;
+         domPopupSearchResultsWindow.style.display = 'block';
+         left -= domPopupSearchResults.offsetWidth;
+         domPopupSearchResultsWindow.style.top     = top  + 'px';
+         domPopupSearchResultsWindow.style.left    = left + 'px';
+       }
+    }
+
+    this.lastSearchValue = searchValue;
+    this.lastResultsPage = resultsPage;
+  }
+
+  // -------- Activation Functions
+
+  // Activates or deactivates the search panel, resetting things to
+  // their default values if necessary.
+  this.Activate = function(isActive)
+  {
+    if (isActive || // open it
+        this.DOMPopupSearchResultsWindow().style.display == 'block'
+       )
+    {
+      this.DOMSearchBox().className = 'MSearchBoxActive';
+
+      var searchField = this.DOMSearchField();
+
+      if (searchField.value == this.searchLabel) // clear "Search" term upon entry
+      {
+        searchField.value = '';
+        this.searchActive = true;
+      }
+    }
+    else if (!isActive) // directly remove the panel
+    {
+      this.DOMSearchBox().className = 'MSearchBoxInactive';
+      this.DOMSearchField().value   = this.searchLabel;
+      this.searchActive             = false;
+      this.lastSearchValue          = ''
+      this.lastResultsPage          = '';
+    }
+  }
+}
+
+// -----------------------------------------------------------------------
+
+// The class that handles everything on the search results page.
+function SearchResults(name)
+{
+    // The number of matches from the last run of <Search()>.
+    this.lastMatchCount = 0;
+    this.lastKey = 0;
+    this.repeatOn = false;
+
+    // Toggles the visibility of the passed element ID.
+    this.FindChildElement = function(id)
+    {
+      var parentElement = document.getElementById(id);
+      var element = parentElement.firstChild;
+
+      while (element && element!=parentElement)
+      {
+        if (element.nodeName == 'DIV' && element.className == 'SRChildren')
+        {
+          return element;
+        }
+
+        if (element.nodeName == 'DIV' && element.hasChildNodes())
+        {
+           element = element.firstChild;
+        }
+        else if (element.nextSibling)
+        {
+           element = element.nextSibling;
+        }
+        else
+        {
+          do
+          {
+            element = element.parentNode;
+          }
+          while (element && element!=parentElement && !element.nextSibling);
+
+          if (element && element!=parentElement)
+          {
+            element = element.nextSibling;
+          }
+        }
+      }
+    }
+
+    this.Toggle = function(id)
+    {
+      var element = this.FindChildElement(id);
+      if (element)
+      {
+        if (element.style.display == 'block')
+        {
+          element.style.display = 'none';
+        }
+        else
+        {
+          element.style.display = 'block';
+        }
+      }
+    }
+
+    // Searches for the passed string.  If there is no parameter,
+    // it takes it from the URL query.
+    //
+    // Always returns true, since other documents may try to call it
+    // and that may or may not be possible.
+    this.Search = function(search)
+    {
+      if (!search) // get search word from URL
+      {
+        search = window.location.search;
+        search = search.substring(1);  // Remove the leading '?'
+        search = unescape(search);
+      }
+
+      search = search.replace(/^ +/, ""); // strip leading spaces
+      search = search.replace(/ +$/, ""); // strip trailing spaces
+      search = search.toLowerCase();
+      search = convertToId(search);
+
+      var resultRows = document.getElementsByTagName("div");
+      var matches = 0;
+
+      var i = 0;
+      while (i < resultRows.length)
+      {
+        var row = resultRows.item(i);
+        if (row.className == "SRResult")
+        {
+          var rowMatchName = row.id.toLowerCase();
+          rowMatchName = rowMatchName.replace(/^sr\d*_/, ''); // strip 'sr123_'
+
+          if (search.length<=rowMatchName.length &&
+             rowMatchName.substr(0, search.length)==search)
+          {
+            row.style.display = 'block';
+            matches++;
+          }
+          else
+          {
+            row.style.display = 'none';
+          }
+        }
+        i++;
+      }
+      document.getElementById("Searching").style.display='none';
+      if (matches == 0) // no results
+      {
+        document.getElementById("NoMatches").style.display='block';
+      }
+      else // at least one result
+      {
+        document.getElementById("NoMatches").style.display='none';
+      }
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doc/en/html/search/searchdata.js

@@ -0,0 +1,24 @@
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doc/en/html/tabs.css

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doc/en/latex/Makefile

@@ -0,0 +1,21 @@
+all: refman.pdf
+
+pdf: refman.pdf
+
+refman.pdf: clean refman.tex
+	pdflatex refman
+	makeindex refman.idx
+	pdflatex refman
+	latex_count=8 ; \
+	while egrep -s 'Rerun (LaTeX|to get cross-references right)' refman.log && [ $$latex_count -gt 0 ] ;\
+	    do \
+	      echo "Rerunning latex...." ;\
+	      pdflatex refman ;\
+	      latex_count=`expr $$latex_count - 1` ;\
+	    done
+	makeindex refman.idx
+	pdflatex refman
+
+
+clean:
+	rm -f *.ps *.dvi *.aux *.toc *.idx *.ind *.ilg *.log *.out *.brf *.blg *.bbl refman.pdf

doc/en/latex/annotated.tex

@@ -0,0 +1,4 @@
+\section{Class List}
+Here are the classes, structs, unions and interfaces with brief descriptions\+:\begin{DoxyCompactList}
+\item\contentsline{section}{\hyperlink{class_main_window}{Main\+Window} }{\pageref{class_main_window}}{}
+\end{DoxyCompactList}

doc/en/latex/class_main_window.eps

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doc/en/latex/class_main_window.tex

@@ -0,0 +1,61 @@
+\hypertarget{class_main_window}{}\section{Main\+Window Class Reference}
+\label{class_main_window}\index{Main\+Window@{Main\+Window}}
+Inheritance diagram for Main\+Window\+:\begin{figure}[H]
+\begin{center}
+\leavevmode
+\includegraphics[height=2.000000cm]{class_main_window}
+\end{center}
+\end{figure}
+\subsection*{Public Member Functions}
+\begin{DoxyCompactItemize}
+\item 
+\hyperlink{class_main_window_a8b244be8b7b7db1b08de2a2acb9409db}{Main\+Window} (Q\+Widget $\ast$parent=0)
+\begin{DoxyCompactList}\small\item\em Function which sets up the \hyperlink{class_main_window}{Main\+Window}. \end{DoxyCompactList}\item 
+\hyperlink{class_main_window_ae98d00a93bc118200eeef9f9bba1dba7}{$\sim$\+Main\+Window} ()
+\begin{DoxyCompactList}\small\item\em Default destructor. \end{DoxyCompactList}\end{DoxyCompactItemize}
+\subsection*{Private Slots}
+\begin{DoxyCompactItemize}
+\item 
+\hypertarget{class_main_window_aeafcd6b6d3fb18aae51bea1492d04012}{}void \hyperlink{class_main_window_aeafcd6b6d3fb18aae51bea1492d04012}{on\+\_\+\+Encode\+Button\+\_\+clicked} ()\label{class_main_window_aeafcd6b6d3fb18aae51bea1492d04012}
+
+\begin{DoxyCompactList}\small\item\em Function that is called when the encode button is pressed. The message and the keyword that the user provides are placed into each variable accordingly, then the cypher function is called using these variables. \end{DoxyCompactList}\item 
+\hypertarget{class_main_window_a5cd75410c0e61895337558eb291fe757}{}void \hyperlink{class_main_window_a5cd75410c0e61895337558eb291fe757}{on\+\_\+\+Decode\+Button\+\_\+clicked} ()\label{class_main_window_a5cd75410c0e61895337558eb291fe757}
+
+\begin{DoxyCompactList}\small\item\em Function that is called when the decode button is pressed. The ciphertext and the keyword that the user provides are placed into each variable accordingly then the decypher function is called using these variables. \end{DoxyCompactList}\end{DoxyCompactItemize}
+\subsection*{Private Attributes}
+\begin{DoxyCompactItemize}
+\item 
+\hypertarget{class_main_window_a35466a70ed47252a0191168126a352a5}{}Ui\+::\+Main\+Window $\ast$ {\bfseries ui}\label{class_main_window_a35466a70ed47252a0191168126a352a5}
+
+\end{DoxyCompactItemize}
+
+
+\subsection{Constructor \& Destructor Documentation}
+\hypertarget{class_main_window_a8b244be8b7b7db1b08de2a2acb9409db}{}\index{Main\+Window@{Main\+Window}!Main\+Window@{Main\+Window}}
+\index{Main\+Window@{Main\+Window}!Main\+Window@{Main\+Window}}
+\subsubsection[{Main\+Window}]{\setlength{\rightskip}{0pt plus 5cm}Main\+Window\+::\+Main\+Window (
+\begin{DoxyParamCaption}
+\item[{Q\+Widget $\ast$}]{parent = {\ttfamily 0}}
+\end{DoxyParamCaption}
+)\hspace{0.3cm}{\ttfamily [explicit]}}\label{class_main_window_a8b244be8b7b7db1b08de2a2acb9409db}
+
+
+Function which sets up the \hyperlink{class_main_window}{Main\+Window}. 
+
+Constructor. \hypertarget{class_main_window_ae98d00a93bc118200eeef9f9bba1dba7}{}\index{Main\+Window@{Main\+Window}!````~Main\+Window@{$\sim$\+Main\+Window}}
+\index{````~Main\+Window@{$\sim$\+Main\+Window}!Main\+Window@{Main\+Window}}
+\subsubsection[{$\sim$\+Main\+Window}]{\setlength{\rightskip}{0pt plus 5cm}Main\+Window\+::$\sim$\+Main\+Window (
+\begin{DoxyParamCaption}
+{}
+\end{DoxyParamCaption}
+)}\label{class_main_window_ae98d00a93bc118200eeef9f9bba1dba7}
+
+
+Default destructor. 
+
+Destructor. 
+
+The documentation for this class was generated from the following files\+:\begin{DoxyCompactItemize}
+\item 
+mainwindow.\+h\item 
+mainwindow.\+cpp\end{DoxyCompactItemize}

doc/en/latex/cypher_8cpp.tex

@@ -0,0 +1,58 @@
+\hypertarget{cypher_8cpp}{}\section{cypher.\+cpp File Reference}
+\label{cypher_8cpp}\index{cypher.\+cpp@{cypher.\+cpp}}
+{\ttfamily \#include $<$string$>$}\\*
+{\ttfamily \#include $<$cassert$>$}\\*
+{\ttfamily \#include $<$iostream$>$}\\*
+{\ttfamily \#include $<$Q\+Debug$>$}\\*
+{\ttfamily \#include \char`\"{}cypher.\+h\char`\"{}}\\*
+\subsection*{Functions}
+\begin{DoxyCompactItemize}
+\item 
+string \hyperlink{cypher_8cpp_aee818f9db10b153b3067af5365a53806}{cypher} (string message, string key)
+\begin{DoxyCompactList}\small\item\em Function that recives the plaintext message and the keyword provided by the user and encrypts the message. \end{DoxyCompactList}\item 
+string \hyperlink{cypher_8cpp_af9f89bd41fe6c015e6589a0677e1d108}{decypher} (string m, string k)
+\begin{DoxyCompactList}\small\item\em Function that deciphers Vigenere ciphertext, receives the ciphertext and the keyword and returns the plaintext. \end{DoxyCompactList}\item 
+\hypertarget{cypher_8cpp_a56eea50b62dd8e9174463bce0b90d213}{}void \hyperlink{cypher_8cpp_a56eea50b62dd8e9174463bce0b90d213}{test\+\_\+cypher} ()\label{cypher_8cpp_a56eea50b62dd8e9174463bce0b90d213}
+
+\begin{DoxyCompactList}\small\item\em Function to unit text the cypher function. \end{DoxyCompactList}\end{DoxyCompactItemize}
+
+
+\subsection{Function Documentation}
+\hypertarget{cypher_8cpp_aee818f9db10b153b3067af5365a53806}{}\index{cypher.\+cpp@{cypher.\+cpp}!cypher@{cypher}}
+\index{cypher@{cypher}!cypher.\+cpp@{cypher.\+cpp}}
+\subsubsection[{cypher}]{\setlength{\rightskip}{0pt plus 5cm}string cypher (
+\begin{DoxyParamCaption}
+\item[{string}]{message, }
+\item[{string}]{key}
+\end{DoxyParamCaption}
+)}\label{cypher_8cpp_aee818f9db10b153b3067af5365a53806}
+
+
+Function that recives the plaintext message and the keyword provided by the user and encrypts the message. 
+
+
+\begin{DoxyParams}{Parameters}
+{\em message} & Message to be encrypted provided by the user \\
+\hline
+{\em key} & keyword that the user provides, used to encrypt plain text \\
+\hline
+\end{DoxyParams}
+\hypertarget{cypher_8cpp_af9f89bd41fe6c015e6589a0677e1d108}{}\index{cypher.\+cpp@{cypher.\+cpp}!decypher@{decypher}}
+\index{decypher@{decypher}!cypher.\+cpp@{cypher.\+cpp}}
+\subsubsection[{decypher}]{\setlength{\rightskip}{0pt plus 5cm}string decypher (
+\begin{DoxyParamCaption}
+\item[{string}]{message, }
+\item[{string}]{key}
+\end{DoxyParamCaption}
+)}\label{cypher_8cpp_af9f89bd41fe6c015e6589a0677e1d108}
+
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+Function that deciphers Vigenere ciphertext, receives the ciphertext and the keyword and returns the plaintext. 
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+\hline
+{\em key} & keyword that the user provides, used to encrypt plain text \\
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doc/en/latex/hierarchy.tex

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+<div class="title">Lista de clases</div>  </div>
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+<div class="contents">
+<div class="textblock">Lista de las clases, estructuras, uniones e interfaces con una breve descripción:</div><div class="directory">
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+</table>
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+      <li><a href="hierarchy.html"><span>Jerarquía&#160;de&#160;la&#160;clase</span></a></li>
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+<div class="title">MainWindow Lista de los miembros</div>  </div>
+</div><!--header-->
+<div class="contents">
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+<p>Lista completa de los miembros de <a class="el" href="class_main_window.html">MainWindow</a>, incluyendo todos los heredados:</p>
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+  <tr class="even"><td class="entry"><a class="el" href="class_main_window.html#a8b244be8b7b7db1b08de2a2acb9409db">MainWindow</a>(QWidget *parent=0)</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"><span class="mlabel">explicit</span></td></tr>
+  <tr><td class="entry"><a class="el" href="class_main_window.html#a5cd75410c0e61895337558eb291fe757">on_DecodeButton_clicked</a>()</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"><span class="mlabel">private</span><span class="mlabel">slot</span></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_main_window.html#aeafcd6b6d3fb18aae51bea1492d04012">on_EncodeButton_clicked</a>()</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"><span class="mlabel">private</span><span class="mlabel">slot</span></td></tr>
+  <tr bgcolor="#f0f0f0"><td class="entry"><b>ui</b> (definido en <a class="el" href="class_main_window.html">MainWindow</a>)</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"><span class="mlabel">private</span></td></tr>
+  <tr class="even"><td class="entry"><a class="el" href="class_main_window.html#ae98d00a93bc118200eeef9f9bba1dba7">~MainWindow</a>()</td><td class="entry"><a class="el" href="class_main_window.html">MainWindow</a></td><td class="entry"></td></tr>
+</table></div><!-- contents -->
+<!-- start footer part -->
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+Generado el Jueves, 4 de Junio de 2015 09:11:50 para My Project por &#160;<a href="http://www.doxygen.org/index.html">
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+<div class="header">
+  <div class="summary">
+<a href="#pub-methods">Métodos públicos</a> &#124;
+<a href="#pri-slots">Slots privados</a> &#124;
+<a href="#pri-attribs">Atributos privados</a> &#124;
+<a href="class_main_window-members.html">Lista de todos los miembros</a>  </div>
+  <div class="headertitle">
+<div class="title">Referencia de la Clase MainWindow</div>  </div>
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+Diagrama de herencias de MainWindow</div>
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+ <div class="center">
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+<tr class="memitem:a8b244be8b7b7db1b08de2a2acb9409db"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#a8b244be8b7b7db1b08de2a2acb9409db">MainWindow</a> (QWidget *parent=0)</td></tr>
+<tr class="memdesc:a8b244be8b7b7db1b08de2a2acb9409db"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function which sets up the <a class="el" href="class_main_window.html">MainWindow</a>.  <a href="#a8b244be8b7b7db1b08de2a2acb9409db">Más...</a><br /></td></tr>
+<tr class="separator:a8b244be8b7b7db1b08de2a2acb9409db"><td class="memSeparator" colspan="2">&#160;</td></tr>
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+void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_main_window.html#a5cd75410c0e61895337558eb291fe757">on_DecodeButton_clicked</a> ()</td></tr>
+<tr class="memdesc:a5cd75410c0e61895337558eb291fe757"><td class="mdescLeft">&#160;</td><td class="mdescRight">Funcion que es llamada cuando el boton de decodificar (decode) es apretado. El texto cifrado y la llave que el usuario provee se ponen en cada variable en consecuencia, entonces la funcion decipher es llamada con estas variables. <br /></td></tr>
+<tr class="separator:a5cd75410c0e61895337558eb291fe757"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
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+<tr class="separator:a35466a70ed47252a0191168126a352a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<h2 class="groupheader">Documentación del constructor y destructor</h2>
+<a class="anchor" id="a8b244be8b7b7db1b08de2a2acb9409db"></a>
+<div class="memitem">
+<div class="memproto">
+<table class="mlabels">
+  <tr>
+  <td class="mlabels-left">
+      <table class="memname">
+        <tr>
+          <td class="memname">MainWindow::MainWindow </td>
+          <td>(</td>
+          <td class="paramtype">QWidget *&#160;</td>
+          <td class="paramname"><em>parent</em> = <code>0</code></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+  </td>
+  <td class="mlabels-right">
+<span class="mlabels"><span class="mlabel">explicit</span></span>  </td>
+  </tr>
+</table>
+</div><div class="memdoc">
+
+<p>Function which sets up the <a class="el" href="class_main_window.html">MainWindow</a>. </p>
+<p>Constructor. </p>
+
+</div>
+</div>
+<a class="anchor" id="ae98d00a93bc118200eeef9f9bba1dba7"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">MainWindow::~MainWindow </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Default destructor. </p>
+<p>Destructor. </p>
+
+</div>
+</div>
+<hr/>La documentación para esta clase fue generada a partir de los siguientes ficheros:<ul>
+<li><a class="el" href="mainwindow_8h_source.html">mainwindow.h</a></li>
+<li>mainwindow.cpp</li>
+</ul>
+</div><!-- contents -->
+<!-- start footer part -->
+<hr class="footer"/><address class="footer"><small>
+Generado el Jueves, 4 de Junio de 2015 09:11:50 para My Project por &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.9.1
+</small></address>
+</body>
+</html>

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+   <div id="projectname">My Project
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+      <li><a href="index.html"><span>Página&#160;principal</span></a></li>
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+      <li class="current"><a href="classes.html"><span>Índice&#160;de&#160;clases</span></a></li>
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+<div class="header">
+  <div class="headertitle">
+<div class="title">Índice de clases</div>  </div>
+</div><!--header-->
+<div class="contents">
+<div class="qindex"><a class="qindex" href="#letter_M">M</a></div>
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