hw11: New homework

11_Toolkits/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+
+project(11_Toolkits)
+
+find_package(PkgConfig REQUIRED)
+pkg_search_module(GLIB REQUIRED glib-2.0)
+
+include_directories(${GLIB_INCLUDE_DIRS})
+link_directories(${GLIB_LIBRARY_DIRS})
+
+add_executable(main main.c)
+
+add_definitions(${GLIB_CFLAGS_OTHER})
+target_link_libraries(main ${GLIB_LIBRARIES})
+

11_Toolkits/main.c

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+#include <stdio.h>
+
+#include <glib.h>
+
+const int BUF_SIZE = 90;
+
+gboolean process_new_line(GHashTable* counts) {
+    gchar buf[BUF_SIZE];
+    char* p = fgets(buf, BUF_SIZE - 1, stdin);
+    if (p == NULL)
+        return FALSE;
+    g_strchomp(buf);
+
+    gchar** words = g_strsplit(buf, " ", -1);
+    for (int word_ind = 0; words[word_ind] != NULL; ++word_ind) {
+        gchar* cur_word = words[word_ind];
+        g_strchomp(cur_word);
+        if (cur_word[0] == '\0') {
+            // removing empty strings
+            continue;
+        }
+        gpointer value_pointer = g_hash_table_lookup(counts, cur_word);
+        int* new_value = g_malloc(sizeof(int));
+        if (value_pointer != NULL) {
+            *new_value = *((int*)value_pointer) + 1;
+        } else {
+            *new_value = 1;
+        }
+        g_hash_table_replace(counts, g_strdup(cur_word), (gpointer)new_value);
+    }
+    g_strfreev(words);
+    return TRUE;
+}
+
+gint array_comparator(gconstpointer a, gconstpointer b, gpointer word_counts) {
+    //  negative value if a < b ; zero if a = b ; positive value if a > b
+    int first = *(int*)g_hash_table_lookup(word_counts, *(char**)a);
+    int second = *(int*)g_hash_table_lookup(word_counts, *(char**)b);
+    gint res;
+    if (first < second)
+        res = 1;
+    else if (first == second)
+        res = 0;
+    else
+        res = -1;
+    return res;
+}
+
+void hash_table_destroyer(gpointer data) {
+    g_free(data);
+}
+
+int main(int argc, char** argv) {
+    GHashTable* word_counts = g_hash_table_new_full(
+        g_str_hash, g_str_equal, hash_table_destroyer, hash_table_destroyer);
+    while (1) {
+        if (!process_new_line(word_counts)) {
+            break;
+        }
+    }
+    GArray* words_array = g_array_new(TRUE, FALSE, sizeof(char*));
+    GList* keys_list = g_hash_table_get_keys(word_counts);
+    while (keys_list != NULL) {
+        int* value = g_hash_table_lookup(word_counts, keys_list->data);
+        g_array_append_val(words_array, keys_list->data);
+        keys_list = keys_list->next;
+    }
+
+    g_array_sort_with_data(words_array, array_comparator, word_counts);
+
+    g_printf("Total %d words\n", words_array->len);
+    for (int i = 0; i < words_array->len; ++i) {
+        char* cur_str = g_array_index(words_array, char*, i);
+        int* value = g_hash_table_lookup(word_counts, cur_str);
+        g_printf("%s -> %d\n", cur_str, *(int*)value);
+    }
+
+    g_list_free(keys_list);
+    g_hash_table_destroy(word_counts);
+    g_array_free(words_array, TRUE);
+    return 0;
+}

11_Toolkits/test_data.txt

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+hello world
+hello world
+hello here
+here
+here
+allow
+