finish

cs-lab34.cbp

@@ -32,7 +32,14 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h" />
+		<Unit filename="histogram_internal.h" />
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h" />
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>

histogram.cpp

@@ -1,16 +1,21 @@
 #include "histogram.h"
-void find_minmax(vector<double> vec, double& min, double& max) {
-    min = vec[0];
-    max = vec[0];
-    for (double x : vec) {
-        if (x < min) {
-            min = x;
-        }
-        else if (x > max)
-        {
-            max = x;
-        }
+#include "histogram_internal.h"
+bool find_minmax(vector<double> vec, double& min, double& max) {
+    if(vec.size() == 0){
+        return false;
     }
+        min = vec[0];
+        max = vec[0];
+        for (double x : vec) {
+            if (x < min) {
+                min = x;
+            }
+            else if (x > max)
+            {
+                max = x;
+            }
+        }
+    return true;
 }
 vector<size_t> make_histogram(size_t number, vector<double> vec) {
     vector<size_t> bins(number);

histogram_internal.h

@@ -1 +1 @@
-void find_minmax(std::vector<double> vec, double& min, double& max);
+bool find_minmax(const std::vector<double> vec, double& min, double& max);

main.cpp

@@ -1,24 +1,61 @@
+#include <curl/curl.h>
+#include <sstream>
+#include <string>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
+
+
 struct Input {
     vector<double> vec;
     size_t korz{};
 };
-Input input_data() {
-    Input in;
+Input input_data(istream& in, bool promt = false) {
+    Input lin;
     size_t n, korz;
-
-    cerr << "Number of elem ";
-    cin >> n;
-    in.vec.resize(n);
+    if(promt)
+        cerr << "Number of elem ";
+    in >> n;
+    lin.vec.resize(n);
     for (size_t i = 0; i < n; i++)
-        cin >> in.vec[i];
-    cerr << "Enter bin count: ";
-    cin >> in.korz;
-    return in;
+        in >> lin.vec[i];
+    if(promt)
+        cerr << "Enter bin count: ";
+    in >> lin.korz;
+    return lin;
 }
-int main() {
-    auto in = input_data();
-    auto bins = make_histogram(in.korz, in.vec);
-    show_histogram(bins);
+size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx){
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    size_t data_size = item_size * item_count;
+    buffer->write(reinterpret_cast<const char*>(items), data_size);
+    return data_size;
+}
+
+Input download(const string& address){
+    stringstream buffer;
+    CURL* curl = curl_easy_init();
+    if (curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        CURLcode res = curl_easy_perform(curl);
+        curl_easy_cleanup(curl);
+        if (res != CURLE_OK) {
+            cerr << "cURL error: " << curl_easy_strerror(res) << endl;
+            exit(1);
+        }
+    return input_data(buffer, false);
+}
+}
+int main(int argc, char* argv[]) {
+    curl_global_init(CURL_GLOBAL_ALL);
+    Input input;
+    if (argc > 1) {
+       input = download(argv[1]);
+    }else{
+        input = input_data(cin, true);
+    }
+    auto bins = make_histogram(input.korz, input.vec);
+    show_histogram_svg(bins);
+    return 0;
 }

svg.cpp

@@ -0,0 +1,77 @@
+#include "svg.h"
+
+using namespace std;
+
+void
+svg_begin(double width, double height)
+{
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end()
+{
+    cout << "</svg>\n";
+}
+
+void
+svg_text(double left, double baseline, string text)
+{
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+void
+svg_rect(double x, double y, double width, double height, string stroke = "black", string fill = "black")
+{
+    cout << "<rect x='"<<x<<"' y='"<<y<<"' width='"<<width<<"' height='"<<height<<"' stroke='"<<stroke<<"' fill='"<<fill<<"' />";
+
+}
+
+
+
+void
+show_histogram_svg(const vector<size_t>& bins)
+{
+    const auto IMAGE_WIDTH = 400;
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+    const auto BLOCK_WIDTH = 10;
+    const auto BLACK = "black";
+
+    const auto MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+
+    svg_begin(IMAGE_WIDTH,IMAGE_HEIGHT);
+
+    double top = 0;
+    double max_count = bins[0];
+    for (size_t i = 0; i < bins.size(); i++)
+    {
+        if (max_count<bins[i])
+        {
+            max_count=bins[i];
+        }
+    }
+
+    for (size_t bin : bins)
+    {
+        const auto RED = "#" + std::to_string(int(ceil(10 - (bin * 9) / max_count))) + std::to_string(int(ceil(10 - (bin * 9) / max_count))) + std::to_string(int(ceil(10 - (bin * 9) / max_count)));
+        double bin_width = (MAX_WIDTH)*(bin/max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, BLACK,RED);
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}
+
+
+

svg.h

@@ -0,0 +1,6 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <math.h>
+using namespace std;
+void show_histogram_svg(const vector<size_t>& bins);

text.cpp

@@ -1,83 +1,44 @@
+#include <iostream>
+#include <vector>
 #include "text.h"
 
-void show_histogram(std::vector<size_t> bins) {
-    bool gigant = false;
-    auto spaces = 0;
-    size_t mx_count = 0;
-    for (auto x : bins) {
-        if (x > 76) {
-            gigant = true;
+using namespace std;
+
+void show_histogram_text(vector<size_t> bins, size_t bin_count){
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+
+    size_t max_bin = bins[0];
+    for(size_t i = 0; i < bin_count; i++)
+    {
+        if(bins[i] > max_bin)
+        {
+            max_bin = bins[i];
         }
-        if (x > mx_count) {
-            mx_count = x;
-        }
-        auto len = 0;
-        while (x > 0) {
-            x /= 10;
-            len++;
-        }
-        if (len > spaces) {
-            spaces = len;
+    }
+
+    for (size_t bin: bins)
+    {
+        size_t height = bin;
+
+        if (max_bin > MAX_ASTERISK)
+        {
+          height = MAX_ASTERISK * (static_cast<double>(bin) / max_bin);
         }
 
-    }
-    if (spaces == 1) {
-        for (size_t i = 0; i < bins.size(); i++) {
-            std::cout << "  " << bins[i] << "|";
-            if (gigant) {
-                if (bins[i] == mx_count) {
-                    for (size_t j = 0; j < 76; j++) {
-                        std::cout << "*";
-                    }
-                }
-                else
-                {
-                    for (size_t j = 0; j < 76 * static_cast<double>(bins[i]) / mx_count; j++) {
-                        std::cout << "*";
-                    }
-                }
-            }
-            else
-            {
-                for (size_t j = 0; j < bins[i]; j++) {
-                    std::cout << "*";
-                }
-                std::cout << std::endl;
-            }
+        if (bin < 100)
+        {
+            cout << ' ';
         }
-    }
-    else
-    {
-        for (size_t i = 0; i < bins.size(); i++) {
-            int len = 1;
-            int k = bins[i];
-            for (; k /= 10; ++len);
-            while (len < spaces) {
-                std::cout << " ";
-                len++;
-            }
-            std::cout << bins[i];
-            std::cout << "|";
-            if (gigant) {
-                if (bins[i] == mx_count) {
-                    for (size_t j = 0; j < 76; j++) {
-                        std::cout << "*";
-                    }
-                }
-                else
-                {
-                    for (size_t j = 0; j < (76 * static_cast<double>(bins[i]) / mx_count - 1); j++) {
-                        std::cout << "*";
-                    }
-                }
-            }
-            else
-            {
-                for (size_t j = 0; j < bins[i]; j++) {
-                    std::cout << "*";
-                }
-            }
-            std::cout << std::endl;
+        if (bin < 10)
+        {
+            cout << ' ';
         }
+        cout << bin << "|";
+        for(size_t i = 0; i < height; i++)
+        {
+            cout << "*";
+        }
+        cout << endl;
     }
 }

text.h

@@ -1,3 +1,3 @@
 #include <iostream>
 #include <vector>
-void show_histogram(std::vector<size_t> bins);
+void show_histogram_text(std::vector<size_t> bins);

unittest.cpp

@@ -0,0 +1,37 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1, 2}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+TEST_CASE("distinct negative numbers"){
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+TEST_CASE("vector of the same elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({3,3,3}, min, max);
+    CHECK(min == 3);
+    CHECK(max == 3);
+}
+TEST_CASE("empty vector"){
+    double min = 0;
+    double max = 0;
+    CHECK(!find_minmax({}, min, max));
+}
+TEST_CASE("vector of one elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({3}, min, max);
+    CHECK(min == max);
+}