feat: add initial project scaffolding with Makefile, C sources, web UI, and documentation

Add Makefile with build targets for sudoku solver, generator, and coverage reporting. Include NOTES.md explaining sudoku difficulty factors and solving techniques. Add README.md with puzzle examples and generator output. Implement app.js with Grid and Grid2 classes for rendering puzzle data in the browser. Add box.c with functions for box indexing, grid-to-array conversion, and box value extraction. Include footer.h with terminal size detection, cursor positioning, and footer display utilities. Add index.html with CSS grid layout and script loading for the web interface. Include rlib.h as a large utility header library.
2025-01-10 21:53:10 +00:00
commit caac0f8341
41 changed files with 21766 additions and 0 deletions
@@ -0,0 +1,99 @@
+#ifndef FOOTER_H
+#define FOOTER_H
+#include <stdio.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <rlib.h>
+#include <pthread.h>
+#include <stdarg.h>
+
+static pthread_mutex_t footer_mutex;
+
+static nsecs_t footer_time_start = 0;
+
+char footer_prefix[1024] = {0};
+char footer_suffix[1024] = {0};
+
+static void footer_get_terminal_size(int *rows, int *cols) {
+    struct winsize w;
+
+    // Use ioctl to get the terminal size
+    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) == -1) {
+        perror("ioctl");
+    } else {
+        *rows = w.ws_row;
+        *cols = w.ws_col;
+    }
+}
+void footer_get_cursor_position(int *rows, int *cols) {
+    // Save the current terminal settings
+    struct termios term, term_saved;
+    tcgetattr(STDIN_FILENO, &term);
+    term_saved = term;
+
+    // Put terminal in raw mode (disable canonical input and echoing)
+    term.c_lflag &= ~(ICANON | ECHO);
+    tcsetattr(STDIN_FILENO, TCSANOW, &term);
+
+    // Request cursor position with ANSI code: ESC [ 6 n
+    printf("\033[6n");
+    fflush(stdout);
+
+    // Read the response: ESC [ rows ; cols R
+    char buf[32];
+    long unsigned int i = 0;
+    char c = 0;
+    while (c != 'R' && i < sizeof(buf) - 1) {
+        __attribute_maybe_unused__ ssize_t bytes_read = read(STDIN_FILENO, &c, 1);
+        buf[i++] = c;
+    }
+    buf[i] = '\0';
+
+    // Parse the response
+    if (sscanf(buf, "\033[%d;%dR", rows, cols) != 2) {
+        *rows = *cols = -1;  // In case of parsing error
+    }
+
+    // Restore the original terminal settings
+    tcsetattr(STDIN_FILENO, TCSANOW, &term_saved);
+}
+
+void _footer_set(unsigned int row, unsigned int col_count, char * text,unsigned int original_row,unsigned int original_col) {
+    char content[2048] = {0};
+    char line[1024];
+    memset(line,' ',sizeof(line) - 1);
+    char cursor_set_string[2048] = {0};
+    sprintf(cursor_set_string,"\e[%d;%dH",row,0);
+    sprintf(content,"%s%s%s\033[%u;%uH",cursor_set_string,text,line,original_row,original_col);
+    content[col_count + strlen(cursor_set_string) + 1] = 0;
+    printf(content);
+}
+void footer_printf(const char *format, ...) {
+    if(footer_time_start == 0)
+    {
+        // Quick, for the threads come a default value
+        footer_time_start = 1;
+        pthread_mutex_init(&footer_mutex,NULL);
+        footer_time_start = nsecs();
+    }
+    pthread_mutex_lock(&footer_mutex);
+    nsecs_t time_elapsed = nsecs() - footer_time_start;
+    int original_row = 0;
+    int original_col = 0;
+    int row_count = 0;
+    int col_count = 0;
+    footer_get_cursor_position(&original_row, &original_col);
+    footer_get_terminal_size(&row_count, &col_count);
+    char text[1024] = {0};
+    char full_text[4096] = {0};
+    va_list args;
+    va_start(args, format);
+    vsprintf(text, format, args);
+    va_end(args);
+    sprintf(full_text,"\r%s - %s%s%s", format_time(time_elapsed), footer_prefix, text, footer_suffix);
+    
+    _footer_set(row_count,col_count,full_text,original_row,original_col);
+    pthread_mutex_unlock(&footer_mutex);
+}
+#endif