From 93c6b29368d1e0487937b433bc6e678da0058055 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gustav@sornas.net>
Date: Tue, 1 Dec 2020 15:25:23 +0100
Subject: given code l6

---
 labb6/src/huffmanutil.h | 105 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100755 labb6/src/huffmanutil.h

(limited to 'labb6/src/huffmanutil.h')

diff --git a/labb6/src/huffmanutil.h b/labb6/src/huffmanutil.h
new file mode 100755
index 0000000..b78023d
--- /dev/null
+++ b/labb6/src/huffmanutil.h
@@ -0,0 +1,105 @@
+/*
+ * TDDD86 Huffman Encoding
+ * This file declares various utility functions used by the main client program.
+ *
+ * Please do not modify this provided file. Your turned-in files should work
+ * with an unmodified version of all provided code files.
+ */
+
+#ifndef _huffmanutil_h
+#define _huffmanutil_h
+
+#include <iostream>
+#include <string>
+using namespace std;
+
+/*
+ * Takes a string of 0 and 1 binary bits and unpacks it so that it actually
+ * stores them with each "bit" being its own ASCII character of '0' or '1'.
+ */
+string bitsToBytes(string text);
+
+/*
+ * Takes a string of '0' and '1' characters and packs it so that it actually
+ * stores them as bits rather than each "bit" being its own ASCII character.
+ */
+string bytesToBits(string text);
+
+/*
+ * Checks whether the given file exists; if it does, prompts the user whether
+ * they want to overwrite the file.  Returns true if the user does want to
+ * overwrite, and false if not.
+ */
+bool confirmOverwrite(string filename);
+
+/*
+ * Returns the size of the given file in bytes.
+ */
+int fileSize(string filename);
+
+/*
+ * Displays a detailed dump of every bit and byte of the given string.
+ * It prints every 8 bits (one byte) followed by a space, 8 bytes per line.
+ * e.g. 10010010 10110011 10100010 00011101 ...
+ */
+void printBits(string text);
+
+/*
+ * Repeatedly asks the user to type a file name using the given prompt message
+ * until the user types the name of a file that exists, then returns that file's name.
+ */
+string promptForExistingFileName(string prompt);
+
+/*
+ * Reads the entire contents of the given input source and returns them as a string.
+ */
+string readEntireFileText(istream& input);
+
+/*
+ * Reads the entire contents of the given input file and returns them as a string.
+ */
+string readEntireFileText(string filename);
+
+/*
+ * Replaces all occurrences in s of the given character with the given other character,
+ * returning the newly formed string.
+ */
+string stringReplace(string s, char oldChar, string newChar);
+
+/*
+ * Replaces all occurrences in s of the given character with the given string,
+ * returning the newly formed string.
+ */
+string stringReplace(string s, char oldChar, string newStr);
+
+/*
+ * Replaces all occurrences in s of the given string with the given other string,
+ * returning the newly formed string.
+ */
+string stringReplace(string s, string oldStr, string newStr);
+
+/*
+ * Returns a string that represents the given character.
+ * For most standard ASCII characters, this is just the character itself.
+ * But for whitespace, escape characters, and extended ASCII, it returns an
+ * expanded representation like "\\n" for '\n' or "???" for a non-printable char.
+ * It also returns "EOF" when passed PSEUDO_EOF and NOT when passed NOT_A_CHAR.
+ */
+string toPrintableChar(int ch);
+
+/*
+ * Prompts the user to answer a yes/no question and returns true if the user
+ * typed 'yes' (or anything that starts with a 'y', case-insensitively),
+ * false if the user types anything that starts with 'n', or re-prompts if
+ * the user doesn't type a 'y' or 'n' word.
+ */
+bool yesOrNo(string prompt);
+
+/*
+ * Returns the root of filename.  The root consists
+ * of everything in filename up to the last dot and
+ * the subsequent extension.  If no dot appears in the final component
+ * of the filename, getRoot returns the entire name.
+ */
+std::string getRoot(std::string filename);
+#endif
-- 
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