[translation] Implement hex and octal conversion functions.

They're similar to str(), except base 8 and 16. Crestwave's brainfuck runs on Hello World!
oils-for-unix · Jul 14, 2020 · 35066bf · 35066bf
1 parent a2b717f
commit 35066bf
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Showing 2 changed files with 18 additions and 3 deletions.
diff --git a/mycpp/mylib.h b/mycpp/mylib.h
@@ -1248,15 +1248,21 @@ inline Writer* Stderr() {
 }
 
 inline Str* hex_lower(int i) {
-  assert(0);
+  char* buf = static_cast<char*>(malloc(kIntBufSize));
+  int len = snprintf(buf, kIntBufSize, "%x", i);
+  return new Str(buf, len);
 }
 
 inline Str* hex_upper(int i) {
-  assert(0);
+  char* buf = static_cast<char*>(malloc(kIntBufSize));
+  int len = snprintf(buf, kIntBufSize, "%X", i);
+  return new Str(buf, len);
 }
 
 inline Str* octal(int i) {
-  assert(0);
+  char* buf = static_cast<char*>(malloc(kIntBufSize));
+  int len = snprintf(buf, kIntBufSize, "%o", i);
+  return new Str(buf, len);
 }
 
 }  // namespace mylib

diff --git a/mycpp/mylib_test.cc b/mycpp/mylib_test.cc
@@ -146,6 +146,15 @@ TEST test_str_funcs() {
   int_str = str(-(1 << 31));
   log("i = %s", int_str->data_);
 
+  int_str = mylib::hex_lower(15);
+  ASSERT(str_equals0("f", int_str));
+
+  int_str = mylib::hex_upper(15);
+  ASSERT(str_equals0("F", int_str));
+
+  int_str = mylib::octal(15);
+  ASSERT(str_equals0("17", int_str));
+
   Str* s1 = new Str("abc\0bcd", 7);
   ASSERT_EQ(7, len(s1));