1 files changed, 28 insertions, 0 deletions
diff --git a/stm/lexerstr.c b/stm/lexerstr.c
new file mode 100644
index 0000000000..cc6be1d1ed
--- /dev/null
+++ b/stm/lexerstr.c
@@ -0,0 +1,28 @@
+#include <stdint.h>
+#include <stdio.h>
+
+#include "misc.h"
+#include "lexer.h"
+#include "lexerstr.h"
+
+unichar str_buf_next_char(mp_lexer_str_buf_t *sb) {
+    if (sb->src_cur < sb->src_end) {
+        return *sb->src_cur++;
+    } else {
+        return MP_LEXER_CHAR_EOF;
+    }
+}
+
+void str_buf_free(mp_lexer_str_buf_t *sb) {
+    if (sb->free) {
+        m_del(char, (char*)sb->src_beg, 0 /* don't know allocated size of src */);
+    }
+}
+
+mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, bool free_str, mp_lexer_str_buf_t *sb) {
+    sb->free = free_str;
+    sb->src_beg = str;
+    sb->src_cur = str;
+    sb->src_end = str + len;
+    return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_char_t)str_buf_next_char, (mp_lexer_stream_close_t)str_buf_free);
+}