Added two working examples, hanoi and printer

examples/hanoi.c

@@ -0,0 +1,73 @@
+#include <cmc/stack.h>
+#include <utl/log.h>
+
+CMC_GENERATE_STACK(stk, stack, int)
+
+struct
+{
+    stack *from;
+    stack *aux;
+    stack *to;
+} print_aux = {NULL};
+
+void print_stacks()
+{
+    for (int i = 9; i >= 0; i--)
+    {
+        int ia = print_aux.from->buffer[i];
+        int ib = print_aux.aux->buffer[i];
+        int ic = print_aux.to->buffer[i];
+
+        printf("| %c | %c | %c |\n",
+               ia == 0 ? 32 : ia + 48,
+               ib == 0 ? 32 : ib + 48,
+               ic == 0 ? 32 : ic + 48);
+    }
+
+    printf("+---+---+---+\n\n");
+}
+
+void move(stack *from, stack *to)
+{
+    stk_push(to, stk_top(from));
+
+    stk_pop(from);
+}
+
+void hanoi(int n, stack *from, stack *aux, stack *to)
+{
+    if (n == 0)
+        return;
+
+    hanoi(n - 1, from, to, aux);
+
+    move(from, to);
+
+    print_stacks();
+
+    hanoi(n - 1, aux, from, to);
+}
+
+int main(int argc, char const *argv[])
+{
+    stack *from = stk_new(10);
+    stack *to = stk_new(10);
+    stack *aux = stk_new(10);
+
+    for (int i = 4; i >= 1; i--)
+        stk_push(from, i);
+
+    print_aux.from = from;
+    print_aux.aux = aux;
+    print_aux.to = to;
+
+    print_stacks();
+
+    hanoi(stk_count(from), from, aux, to);
+
+    stk_free(from, NULL);
+    stk_free(to, NULL);
+    stk_free(aux, NULL);
+
+    return 0;
+}

examples/printer.c

@@ -0,0 +1,208 @@
+#include <cmc/list.h>
+#include <utl/log.h>
+
+#define TAB_SIZE 4
+#define ROW_INI_CAP DOC_LETTERS_IN_ROW
+#define DOC_LETTERS_IN_ROW 100
+#define DOC_ROWS_IN_PAGE 50
+#define DOC_MARGIN 4
+
+CMC_GENERATE_LIST(row, row, char)
+CMC_GENERATE_LIST(doc, document, row *)
+
+void row_deallocator(row *r)
+{
+    row_free(r, NULL);
+}
+
+document *document_load(const char *file_name);
+void document_empty_line(FILE *fptr);
+void document_page_outline(FILE *fptr, int outline);
+void document_page_margin(FILE *fptr, int margin);
+void document_print(document *doc, FILE *fptr);
+
+document *document_load(const char *file_name)
+{
+    FILE *file = fopen(file_name, "r");
+
+    if (!file)
+    {
+        cmc_log_error("File %s not found\n", file_name);
+        return NULL;
+    }
+
+    row *initial_row = row_new(ROW_INI_CAP);
+
+    document *doc = doc_new(100);
+    doc_push_back(doc, initial_row);
+
+    int ch;
+
+    while ((ch = getc(file)) != EOF)
+    {
+        char c = (char)ch;
+
+        row *current_row = doc_back(doc);
+
+        if (c == '\n')
+        {
+            row *new_row = row_new(ROW_INI_CAP);
+            doc_push_back(doc, new_row);
+        }
+        else if (c == '\t')
+        {
+            intmax_t left = TAB_SIZE;
+
+            while (left > 0 && row_count(current_row) < DOC_LETTERS_IN_ROW)
+            {
+                row_push_back(current_row, ' ');
+                left--;
+            }
+
+            if (left > 0)
+            {
+                row *new_row = row_new(ROW_INI_CAP);
+                doc_push_back(doc, new_row);
+
+                while (left > 0)
+                {
+                    row_push_back(new_row, ' ');
+                    left--;
+                }
+            }
+        }
+        else if (DOC_LETTERS_IN_ROW == row_count(current_row))
+        {
+            row *new_row = row_new(ROW_INI_CAP);
+            row_push_back(new_row, c);
+            doc_push_back(doc, new_row);
+        }
+        else
+            row_push_back(current_row, c);
+    }
+
+    return doc;
+}
+
+void document_empty_line(FILE *fptr)
+{
+    fputs("|", fptr);
+    for (size_t i = 0; i < DOC_LETTERS_IN_ROW + DOC_MARGIN * 2; i++)
+    {
+        fputc(' ', fptr);
+    }
+    fputs("|\n", fptr);
+}
+
+void document_page_outline(FILE *fptr, int outline /* 0 - header, 1 - footer */)
+{
+    if (outline == 1)
+    {
+        document_empty_line(fptr);
+#ifdef DOC_PAGE_NUMBER
+        static intmax_t page = 1;
+
+        fputs("|", fptr);
+        for (size_t i = 0; i < (DOC_LETTERS_IN_ROW + DOC_MARGIN) - 8; i++)
+        {
+            fputc(' ', fptr);
+        }
+
+        fprintf(fptr, "%8" PRIdMAX "", page);
+        page++;
+
+        document_page_margin(fptr, 1);
+        document_empty_line(fptr);
+#endif
+    }
+
+    fputs("+", fptr);
+    for (size_t i = 0; i < DOC_LETTERS_IN_ROW + DOC_MARGIN * 2; i++)
+    {
+        fputc('-', fptr);
+    }
+    fputs("+\n", fptr);
+
+    if (outline == 0)
+        document_empty_line(fptr);
+}
+
+void document_page_margin(FILE *fptr, int margin /* 0 - first margin, 1 - second margin */)
+{
+    if (margin == 0)
+        fputs("|", fptr);
+
+    for (size_t i = 0; i < DOC_MARGIN; i++)
+    {
+        fputc(' ', fptr);
+    }
+
+    if (margin == 1)
+        fputs("|\n", fptr);
+}
+
+void document_print(document *doc, FILE *fptr)
+{
+    fputc('\n', fptr);
+
+    intmax_t current_page_row = 0, total_rows = doc_count(doc);
+
+    // Print document
+    for (intmax_t i = 0; i < total_rows; i++, current_page_row++)
+    {
+        if (current_page_row == 0)
+            document_page_outline(fptr, 0);
+
+        row *current_row = doc_get(doc, i);
+
+        if (!current_row)
+            cmc_log_fatal("Unexpected NULL pointer for %s", "current_row");
+
+        document_page_margin(fptr, 0);
+
+        for (size_t k = 0; k < row_count(current_row); k++)
+            fputc(row_get(current_row, k), fptr);
+
+        // Trailing margin
+        for (size_t k = 0; k < DOC_LETTERS_IN_ROW - row_count(current_row); k++)
+            fputc(' ', fptr);
+
+        document_page_margin(fptr, 1);
+
+        // Print the end of the page and reset
+        if (current_page_row == DOC_ROWS_IN_PAGE - 1)
+        {
+            document_page_outline(fptr, 1);
+            current_page_row = -1;
+            fputc('\n', fptr);
+        }
+    }
+
+    // Print trailing page
+    if (total_rows % DOC_ROWS_IN_PAGE != 0)
+    {
+        for (size_t i = 0; i < DOC_ROWS_IN_PAGE - current_page_row; i++)
+            document_empty_line(fptr);
+
+        document_page_outline(fptr, 1);
+    }
+
+    fputc('\n', fptr);
+}
+
+int main(int argc, char const *argv[])
+{
+    if (argc != 2)
+    {
+        cmc_log_error("Please define one argument only for %s", argv[0]);
+        return 1;
+    }
+
+    document *doc = document_load(argv[1]);
+
+    document_print(doc, stdout);
+
+    doc_free(doc, row_deallocator);
+
+    return 0;
+}