Add: cowsay, splash

src/programs/cowsay.c

@@ -0,0 +1,72 @@
+// Cowsay-like program
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https://github.com/xamidev/blankos
+
+#include "../libc/stdio.h"
+#include "../libc/string.h"
+
+#define MAX_MSG_LEN 128
+
+const char* cow =
+"        \\   ^__^\n"
+"         \\  (oo)\\_______\n"
+"            (__)\\       )\\/\\\n"
+"                ||----w |\n"
+"                ||     ||\n";
+
+void print_bubble(const char* message)
+{
+	int len = strlen(message);
+	puts(" ");
+	for (int i=0; i<len+2; i++)
+	{
+		puts("_");
+	}
+	puts("\n");
+
+	printf("< %s >\n", message);
+
+	puts(" ");
+	for (int i=0; i<len+2; i++)
+	{
+		puts("-");
+	}
+	puts("\n");
+}
+
+void cowsay(char* msg, uint32_t fg, uint32_t bg)
+{
+	print_bubble(msg);
+	colorputs(cow, fg, bg);
+}
+
+void program_cowsay(int argc, char* argv[])
+{
+	if (argc < 2)
+	{
+		printf("Usage: %s <message>\n", argv[0]);
+		return;
+	}
+
+	char message[MAX_MSG_LEN];
+	message[0] = '\0';
+
+	for (int i=1; i<argc; i++)
+	{
+		if (strlen(message) + strlen(argv[i]) + 1 < MAX_MSG_LEN)
+		{
+			strcat(message, argv[i]);
+			if (i < argc-1)
+			{
+				strcat(message, " ");
+			}
+		} else {
+			puts("Too long message.\n");
+			return;
+		}
+	}
+
+	print_bubble(message);
+	printf("%s", cow);
+}