Add program: primes

src/kernel/shell.c

@@ -12,7 +12,7 @@ void shell_install()
     char input_buffer[BUFFER_SIZE];
     colorputs("blankos> ", 9);
     get_input(input_buffer, BUFFER_SIZE);
-    printf("\n");
+    puts("\n");
     
     // Childish shell
     if (strcmp(input_buffer, "") == 0)
@@ -21,7 +21,7 @@ void shell_install()
     }
     else if (strcmp(input_buffer, "help") == 0)
     {
-        printf("This is the Blank Operating System\ndesigned for fun by xamidev\n\nCommand help:\n\n\thelp - shows this message\n\tpanic - makes the kernel panic\n\twords - generates random words\n");
+        printf("This is the Blank Operating System\ndesigned for fun by xamidev\n\nCommand help:\n\n\thelp - shows this message\n\tpanic - makes the kernel panic\n\twords - generates random words\n\tprimes - computes prime numbers\n");
     }
     else if (strcmp(input_buffer, "panic") == 0)
     {
@@ -31,6 +31,10 @@ void shell_install()
     {
 	    program_words();
     }
+    else if (strcmp(input_buffer, "primes") == 0)
+    {
+	    program_primes();
+    }
     else {
 	printf("Unknown command %s\n", input_buffer);
     }

src/programs/primes.c

@@ -0,0 +1,23 @@
+#include "../libc/stdint.h"
+#include "../libc/stdio.h"
+
+#define PRIMES_MAX 1000000
+
+bool isPrime(int n)
+{
+	if (n == 1 || n == 0) return false;
+	for (int i=2; i<= n/2; i++) if (n%i == 0) return false;
+	return true;
+}
+
+void program_primes()
+{
+	for (long long x=0; x<PRIMES_MAX; x++)
+	{	
+		if (isPrime(x))
+		{
+				printf("%d ", x);
+		}
+	}
+	puts("\n");
+}

src/programs/programs.h

@@ -2,5 +2,6 @@
 #define PROGRAMS_H
 
 void program_words();
+void program_primes();
 
 #endif