Data commit

Task/Terminal-control-Positional-read/Wren/terminal-control-positional-read-1.wren

@@ -0,0 +1,58 @@
+/* terminal_control_positional_read.wren */
+
+import "random" for Random
+
+foreign class Window {
+    construct initscr() {}
+
+    foreign addstr(str)
+
+    foreign inch(y, x)
+
+    foreign move(y, x)
+
+    foreign refresh()
+
+    foreign getch()
+
+    foreign delwin()
+}
+
+class Ncurses {
+    foreign static endwin()
+}
+
+// initialize curses window
+var win = Window.initscr()
+if (win == 0) {
+    System.print("Failed to initialize ncurses.")
+    return
+}
+
+// print random text in a 10x10 grid
+var rand = Random.new()
+for (row in 0..9) {
+    var line = (0..9).map{ |d| String.fromByte(rand.int(41, 91)) }.join()
+    win.addstr(line + "\n")
+}
+
+// read
+var col = 3 - 1
+var row = 6 - 1
+var ch = win.inch(row, col)
+
+// show result
+win.move(row, col + 10)
+win.addstr("Character at column 3, row 6 = %(ch)")
+win.move(11, 0)
+win.addstr("Press any key to exit...")
+
+// refresh
+win.refresh()
+
+// wait for a keypress
+win.getch()
+
+// clean-up
+win.delwin()
+Ncurses.endwin()

Task/Terminal-control-Positional-read/Wren/terminal-control-positional-read-2.wren

@@ -0,0 +1,144 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ncurses.h>
+#include "wren.h"
+
+/* C <=> Wren interface functions */
+
+void C_windowAllocate(WrenVM* vm) {
+    WINDOW** pwin = (WINDOW**)wrenSetSlotNewForeign(vm, 0, 0, sizeof(WINDOW*));
+    *pwin = initscr();
+}
+
+void C_addstr(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    const char *str = wrenGetSlotString(vm, 1);
+    waddstr(win, str);
+}
+
+void C_inch(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    int y = (int)wrenGetSlotDouble(vm, 1);
+    int x = (int)wrenGetSlotDouble(vm, 2);
+    char c = (char)mvwinch(win, y, x);
+    char s[2] = "\0";
+    sprintf(s, "%c", c);
+    wrenSetSlotString(vm, 0, s);
+}
+
+void C_move(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    int y = (int)wrenGetSlotDouble(vm, 1);
+    int x = (int)wrenGetSlotDouble(vm, 2);
+    wmove(win, y, x);
+}
+
+void C_refresh(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    wrefresh(win);
+}
+
+void C_getch(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    wgetch(win);
+}
+
+void C_delwin(WrenVM* vm) {
+    WINDOW* win = *(WINDOW**)wrenGetSlotForeign(vm, 0);
+    delwin(win);
+}
+
+void C_endwin(WrenVM* vm) {
+    endwin();
+}
+
+WrenForeignClassMethods bindForeignClass(WrenVM* vm, const char* module, const char* className) {
+    WrenForeignClassMethods methods;
+    methods.allocate = NULL;
+    methods.finalize = NULL;
+    if (strcmp(module, "main") == 0) {
+        if (strcmp(className, "Window") == 0) {
+            methods.allocate = C_windowAllocate;
+        }
+    }
+    return methods;
+}
+
+WrenForeignMethodFn bindForeignMethod(
+    WrenVM* vm,
+    const char* module,
+    const char* className,
+    bool isStatic,
+    const char* signature) {
+    if (strcmp(module, "main") == 0) {
+        if (strcmp(className, "Window") == 0) {
+            if (!isStatic && strcmp(signature, "addstr(_)") == 0) return C_addstr;
+            if (!isStatic && strcmp(signature, "inch(_,_)") == 0) return C_inch;
+            if (!isStatic && strcmp(signature, "move(_,_)") == 0) return C_move;
+            if (!isStatic && strcmp(signature, "refresh()") == 0) return C_refresh;
+            if (!isStatic && strcmp(signature, "getch()") == 0)   return C_getch;
+            if (!isStatic && strcmp(signature, "delwin()") == 0)  return C_delwin;
+        } else if (strcmp(className, "Ncurses") == 0) {
+            if ( isStatic && strcmp(signature, "endwin()") == 0)  return C_endwin;
+        }
+    }
+    return NULL;
+}
+
+static void writeFn(WrenVM* vm, const char* text) {
+    printf("%s", text);
+}
+
+void errorFn(WrenVM* vm, WrenErrorType errorType, const char* module, const int line, const char* msg) {
+    switch (errorType) {
+        case WREN_ERROR_COMPILE:
+            printf("[%s line %d] [Error] %s\n", module, line, msg);
+            break;
+        case WREN_ERROR_STACK_TRACE:
+            printf("[%s line %d] in %s\n", module, line, msg);
+            break;
+        case WREN_ERROR_RUNTIME:
+            printf("[Runtime Error] %s\n", msg);
+            break;
+    }
+}
+
+char *readFile(const char *fileName) {
+    FILE *f = fopen(fileName, "r");
+    fseek(f, 0, SEEK_END);
+    long fsize = ftell(f);
+    rewind(f);
+    char *script = malloc(fsize + 1);
+    fread(script, 1, fsize, f);
+    fclose(f);
+    script[fsize] = 0;
+    return script;
+}
+
+int main(int argc, char **argv) {
+    WrenConfiguration config;
+    wrenInitConfiguration(&config);
+    config.writeFn = &writeFn;
+    config.errorFn = &errorFn;
+    config.bindForeignClassFn = &bindForeignClass;
+    config.bindForeignMethodFn = &bindForeignMethod;
+    WrenVM* vm = wrenNewVM(&config);
+    const char* module = "main";
+    const char* fileName = "terminal_control_positional_read.wren";
+    char *script = readFile(fileName);
+    WrenInterpretResult result = wrenInterpret(vm, module, script);
+    switch (result) {
+        case WREN_RESULT_COMPILE_ERROR:
+            printf("Compile Error!\n");
+            break;
+        case WREN_RESULT_RUNTIME_ERROR:
+            printf("Runtime Error!\n");
+            break;
+        case WREN_RESULT_SUCCESS:
+            break;
+    }
+    wrenFreeVM(vm);
+    free(script);
+    return 0;
+}