Added code

Makefile

@@ -0,0 +1,19 @@
+all: unicon
+
+WARNINGS = -Wall
+DEBUG = -ggdb -fno-omit-frame-pointer
+OPTIMIZE = -O2
+OPTS = -lm
+
+unicon: Makefile unicon.c
+	$(CC) -o $@ $(WARNINGS) $(DEBUG) $(OPTIMIZE) $(OPTS) unicon.c
+
+clean:
+	rm -f unicon
+
+install:
+	echo "Installing is not supported"
+
+run:
+	./unicon
+

README.md

@@ -1,2 +1,81 @@
 # unicon
-A simple and efficient unit conversion command line tool written in C
+
+## Table of Contents
+
+- [Introduction](#introduction)
+- [Features](#features)
+- [Bulding](#building)
+- [Usage](#usage)
+- [Options](#options)
+- [Examples](#examples)
+
+## Introduction
+**unicon** is a command-line unit conversion tool that allows you to easily
+convert values between various units such as temperature, length, time, mass,
+and digital storage. This tool is designed to be user-friendly and flexible,
+allowing you to convert units with precision.
+
+## Features
+- Convert between a wide range of unit types including temperature, length,
+  time, mass, and digital storage.
+- Easily specify the number of decimal places for rounding the result.
+
+## Building
+
+This tool is provided as source code and can be built using `make`. By just
+typing make in the terminal within the code's directory:
+
+   ```bash
+   make
+   ```
+
+You should now have an executable named `unicon`. You can copy it to a location
+in your PATH for easy access.
+
+## Usage
+
+The general usage format for the **unicon** tool is as follows:
+
+```bash
+unicon [OPTIONS] VALUE from <UNIT> to <UNIT>
+```
+
+- `OPTIONS`: Optional command-line options (see [Options](#options)).
+- `VALUE`: The numeric value you want to convert.
+- `from`: Keyword to specify the source unit.
+- `<UNIT>`: The source unit you want to convert from.
+- `to`: Keyword to specify the target unit.
+- `<UNIT>`: The target unit you want to convert to.
+
+## Options
+
+- `-r, --round=PLACES`: Round the result to the specified number of decimal
+  places.
+- `-h, --help`: Display the help message and exit.
+- `-v, --version`: Display version information and exit.
+
+## Examples
+
+1. Convert 100 degrees Celsius to Fahrenheit, rounding to 2 decimal places:
+
+   ```bash
+   unicon -r 2 100 from celsius to fahrenheit
+   ```
+
+2. Convert 5 kilometers to miles, rounding to 3 decimal places:
+
+   ```bash
+   unicon -r 3 5 from kilometers to miles
+   ```
+
+3. Display the help message:
+
+   ```bash
+   unicon -h
+   ```
+
+4. Display version:
+
+   ```bash
+   unicon -v
+   ```

unicon.c

@@ -0,0 +1,359 @@
+/* 
+ * unicon.c
+ *
+ * Copyright 2024 Clay Gomera
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <ctype.h>
+#include <string.h>
+#include <math.h>
+
+#define VERSION 0.1
+
+// Enumeration for each unit type
+typedef enum {
+    TEMPERATURE,
+    LENGTH,
+    TIME,
+    MASS,
+    DIGITAL
+} UnitType;
+
+// Enumeration for each unit
+typedef enum {
+    // Temperature units
+    CELSIUS, FAHRENHEIT, KELVIN,
+    // Length units
+    METERS, CENTIMETERS, DECIMETERS, DECAMETERS, HECTOMETERS, KILOMETERS, MILLIMETERS, MILE, INCHES, FEET,
+    // Time units
+    SECONDS, MILLISECONDS, MINUTES, HOURS, DAYS, MONTHS, YEARS,
+    // Mass units
+    GRAMS, CENTIGRAMS, DECIGRAMS, DECAGRAMS, HECTOGRAMS, MILLIGRAMS, KILOGRAMS, POUNDS, OUNCES,
+    // Digital storage units
+    BYTES, KILOBYTES, MEGABYTES, GIGABYTES, TERABYTES, PETABYTES, EXABYTES
+} Unit;
+
+// Struct for the units table
+typedef struct _UnitTable {
+    UnitType type;
+    Unit unit;
+    const char *name;
+    double conversion_factor;
+} UnitTable;
+
+// Units table with conversion factors
+UnitTable unit_table[] = {
+    // Temperature units
+    {TEMPERATURE, CELSIUS, "celsius", 0},
+    {TEMPERATURE, FAHRENHEIT, "fahrenheit", 0},
+    {TEMPERATURE, KELVIN, "kelvin", 0},
+    // Length units
+    {LENGTH, METERS, "meters", 1.0},
+    {LENGTH, CENTIMETERS, "centimeters", 100.0},
+    {LENGTH, DECIMETERS, "decimeters", 10.0},
+    {LENGTH, DECAMETERS, "decameters", 0.1},
+    {LENGTH, HECTOMETERS, "hectometers", 0.01},
+    {LENGTH, KILOMETERS, "kilometers", 0.001},
+    {LENGTH, MILLIMETERS, "millimeters", 1000.0},
+    {LENGTH, MILE, "miles", 0.000621371},
+    {LENGTH, INCHES, "inches", 39.3701},
+    {LENGTH, FEET, "feet", 3.28084},
+    // Time units
+    {TIME, SECONDS, "seconds", 1.0},
+    {TIME, MILLISECONDS, "milliseconds", 1000.0},
+    {TIME, MINUTES, "minutes", 1.0 / 60.0},
+    {TIME, HOURS, "hours", 1.0 / 3600.0},
+    {TIME, DAYS, "days", 1.0 / 86400.0},
+    {TIME, MONTHS, "months", 1.0 / 2592000.0},
+    {TIME, YEARS, "years", 1.0 / 31536000.0},
+    // Mass units
+    {MASS, GRAMS, "grams", 1.0},
+    {MASS, CENTIGRAMS, "centigrams", 100.0},
+    {MASS, DECIGRAMS, "decigrams", 10.0},
+    {MASS, DECAGRAMS, "decagrams", 0.1},
+    {MASS, HECTOGRAMS, "hectograms", 0.01},
+    {MASS, MILLIGRAMS, "milligrams", 1000.0},
+    {MASS, KILOGRAMS, "kilograms", 0.001},
+    {MASS, POUNDS, "pounds", 0.00220462},
+    {MASS, OUNCES, "ounces", 0.03527396},
+    // Digital storage units
+    {DIGITAL, BYTES, "bytes", 1.0},
+    {DIGITAL, KILOBYTES, "kilobytes", 1.0 / 1024.0},
+    {DIGITAL, MEGABYTES, "megabytes", 1.0 / 1048576.0},
+    {DIGITAL, GIGABYTES, "gigabytes", 1.0 / 1073741824.0},
+    {DIGITAL, TERABYTES, "terabytes", 1.0 / 1099511627776.0},
+    {DIGITAL, PETABYTES, "petabytes", 1.0 / 1125899906842624.0},
+    {DIGITAL, EXABYTES, "exabytes", 1.0 / 1152921504606846976.0},
+};
+
+// Function prototypes
+bool isNumeric(const char *str);
+double convertUnit(double value, Unit from, Unit to);
+Unit matchArgument(const char *arg);
+void displayHelp();
+void displayVersion();
+void displayUnits();
+
+int main(int argc, char **argv) {
+    int opt;
+    int round_places = -1; // Default value for rounding places
+    
+    // Check if there are no command-line arguments
+    if (argc == 1) {
+        displayHelp();
+        return 0;
+    }
+
+    static const char* const short_options = "r:shv";
+    static struct option long_options[] = {
+        {"round", required_argument, 0, 'r'},
+        {"show", no_argument, 0, 's'},
+        {"help", no_argument, 0, 'h'},
+        {"version", no_argument, 0, 'v'},
+        {NULL, 0, NULL, 0}
+    };
+
+    // Command line option parsing
+    while ((opt = getopt_long(argc, argv, short_options, long_options, NULL)) != -1) {
+        switch (opt) {
+            case 'r':
+                round_places = atoi(optarg);
+                break;
+            case 'h':
+                displayHelp();
+                return 0;
+            case 'v':
+                displayVersion();
+                return 0;
+            case 's':
+                displayUnits();
+                return 0;
+            default:
+                fprintf(stderr, "Use '-h, --help' for help.\n");
+                return 1;
+        }
+    }
+
+    // Check if there are enough arguments
+    if (optind + 5 != argc) {
+        printf("Invalid command format. Please provide the correct number of arguments.\n");
+        displayHelp();
+        return 1;
+    }
+
+    // Extract the value to convert
+    if (!isNumeric(argv[optind])) {
+        printf("Invalid value provided. Please provide a valid numeric value.\n");
+        return 1;
+    }
+
+    double value = atof(argv[optind]);
+
+    // Find the positions of "from" and "to" keywords
+    int fromPos = -1;
+    int toPos = -1;
+    for (int i = optind + 1; i < argc - 1; i++) {
+        if (strcasecmp(argv[i], "from") == 0) {
+            fromPos = i + 1;
+        } else if (strcasecmp(argv[i], "to") == 0) {
+            toPos = i + 1;
+        }
+    }
+
+    // Check if both "from" and "to" keywords were found
+    if (fromPos == -1 || toPos == -1) {
+        printf("Invalid command format. Please provide both 'from' and 'to' units.\n");
+        displayHelp();
+        return 1;
+    }
+
+    // Find the matching units
+    Unit from = matchArgument(argv[fromPos]);
+    Unit to = matchArgument(argv[toPos]);
+
+    // Check if both units are valid
+    if (from == -1 || to == -1) {
+        printf("Invalid units provided. Please provide valid units.\n");
+        displayHelp();
+        return 1;
+    }
+
+    // Convert the value
+    double result;
+    if (from < to) {
+        result = convertUnit(value, from, to);
+    } else {
+        result = convertUnit(value, to, from);
+    }
+    
+    // Round the result if round_places is set
+    if (round_places >= 0) {
+        result = round(result * pow(10, round_places)) / pow(10, round_places);
+    }
+    
+    // Determine the number of decimal places for formatting
+    int decimal_places = (round_places >= 0) ? round_places : 2;
+    
+    // Display the result with the appropriate decimal places
+    printf("%.*f %s = %.*f %s\n", decimal_places, value, unit_table[from].name, decimal_places, result, unit_table[to].name);
+    
+    return 0;
+}
+
+// Function to check if a string is a valid number
+bool isNumeric(const char *str) {
+    if (str == NULL || str[0] == '\0') {
+        return false;
+    }
+    int i = 0;
+    if (str[0] == '-' || str[0] == '+') {
+        i++;
+    }
+    int dotCount = 0;
+    int len = strlen(str);
+    for (; i < len; i++) {
+        if (!isdigit(str[i])) {
+            if (str[i] == '.' && dotCount == 0) {
+                dotCount++;
+            } else {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+// Function to convert a value from one unit to another
+double convertUnit(double value, Unit from, Unit to) {
+    if (from == to) {
+        return value;
+    }
+
+    // Temperatures need to be handled by formula
+    switch (from) {
+        case CELSIUS:
+            switch (to) {
+                case FAHRENHEIT:
+                    return (value * 9/5) + 32;
+                case KELVIN:
+                    return value + 273.15;
+                default:
+                    break;
+            }
+        case FAHRENHEIT:
+            switch (to) {
+                case CELSIUS:
+                    return (value - 32) * 5/9;
+                case KELVIN:
+                    return (value - 32) * 5/9 + 273.15;
+                default:
+                    break;
+            }
+        case KELVIN:
+            switch (to) {
+                case CELSIUS:
+                    return value - 273.15;
+                case FAHRENHEIT:
+                    return (value - 273.15) * 9/5 + 32;
+                default:
+                    break;
+            }
+        default:
+            if (unit_table[from].type != unit_table[to].type) {
+                printf("Cannot convert between different unit types.\n");
+                exit(1);
+            }
+            double factor = unit_table[from].conversion_factor / unit_table[to].conversion_factor;
+            return value * factor;
+    }
+}
+
+// Function to match an argument to a unit
+Unit matchArgument(const char *arg) {
+    for (int i = 0; i < sizeof(unit_table) / sizeof(unit_table[0]); i++) {
+        if (strcasecmp(arg, unit_table[i].name) == 0) {
+            return unit_table[i].unit;
+        }
+    }
+    return -1;
+}
+
+// Function to display the help message
+void displayHelp() {
+    printf("Usage: unicon [OPTIONS] VALUE from <UNIT> to <UNIT>\n");
+    printf("Convert between various units.\n\n");
+    printf("Options:\n");
+    printf("\t-r, --round=PLACES   Round the result to the specified number of decimal places.\n");
+    printf("\t-s, --show           Show the full table of supported units.\n");
+    printf("\t-h, --help           Display this help message and exit.\n");
+    printf("\t-v, --version        Display version information and exit.\n");
+}
+
+void displayUnits() {
+    printf("Supported units:\n");
+    printf("TEMPERATURE:\n");
+    printf("\t- Celsius\n");
+    printf("\t- Fahrenheit\n");
+    printf("\t- Kelvin\n");
+    printf("LENGTH:\n");
+    printf("\t- Millimeters\n");
+    printf("\t- Centimeters\n");
+    printf("\t- Decimeters\n");
+    printf("\t- Meters\n");
+    printf("\t- Decameters\n");
+    printf("\t- Hectometers\n");
+    printf("\t- Kilometers\n");
+    printf("\t- Miles\n");
+    printf("\t- Inches\n");
+    printf("\t- Feet\n");
+    printf("TIME:\n");
+    printf("\t- Milliseconds\n");
+    printf("\t- Seconds\n");
+    printf("\t- Minutes\n");
+    printf("\t- Hours\n");
+    printf("\t- Days\n");
+    printf("\t- Months\n");
+    printf("\t- Years\n");
+    printf("MASS:\n");
+    printf("\t- Milligrams\n");
+    printf("\t- Centigrams\n");
+    printf("\t- Decigrams\n");
+    printf("\t- Grams\n");
+    printf("\t- Decagrams\n");
+    printf("\t- Hectograms\n");
+    printf("\t- Kilograms\n");
+    printf("\t- Pounds\n");
+    printf("\t- Ounces\n");
+    printf("DIGITAL STORAGE:\n");
+    printf("\t- Bytes\n");
+    printf("\t- Kilobytes\n");
+    printf("\t- Megabytes\n");
+    printf("\t- Gigabytes\n");
+    printf("\t- Terabytes\n");
+    printf("\t- Petabytes\n");
+    printf("\t- Exabytes\n");
+}
+
+// Function to display the version information
+void displayVersion() {
+    printf("unicon v%.1f\n", VERSION);
+}