Add all the assignment code.

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

hw5/ll/llruntime.c

@@ -0,0 +1,38 @@
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/* TODO: if we enforce that all char literals are null-terminated,
+   and all allocated memory is zero-initialized, are these safe
+   when llvmlite program does not exhibit UB? */
+
+void *ll_malloc(int64_t n, int64_t size) {
+  return calloc(n, size);
+}
+
+int64_t ll_strlen(int8_t *s) {
+  return 0;
+}
+
+int8_t *ll_strncopy(int8_t *dst, int8_t *src, int64_t i) {
+  int64_t src_size = ll_strlen(src);
+  int64_t dst_size = ll_strlen(dst);
+  if (i >= dst_size)
+    return dst;
+  else
+    return (int8_t*)strncpy((char *)dst + i, (char *)src, dst_size - i);
+}
+
+void ll_puts(int8_t *s) {
+  puts((char *)s);
+}
+
+int64_t ll_atol(int8_t *s) {
+  return atol((char *)s);
+}
+
+int64_t ll_ltoa(int64_t i, int8_t *dst) {
+  int64_t size = ll_strlen(dst);
+  return snprintf((char *)dst, size, "%ld", (long)i);
+}