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-rw-r--r--src/lexer.c5
-rw-r--r--src/shared.h2
2 files changed, 5 insertions, 2 deletions
diff --git a/src/lexer.c b/src/lexer.c
index 5863ef6..a3d5b61 100644
--- a/src/lexer.c
+++ b/src/lexer.c
@@ -85,8 +85,11 @@ char *vstr_strdup(vstr_t *vstr)
return str;
}
-char *vstr_to_cstr(vstr_t *vstr)
+const char *vstr_to_cstr(vstr_t *vstr)
{
+ if (!vstr->size)
+ return NULL;
+
vstr->data[vstr->size] = '\0';
return vstr->data;
}
diff --git a/src/shared.h b/src/shared.h
index bf4adeb..1554ce9 100644
--- a/src/shared.h
+++ b/src/shared.h
@@ -131,7 +131,7 @@ void vstr_clear(vstr_t *vstr);
int vstr_putc(vstr_t *vstr, char ch);
int vstr_cmp(vstr_t *vstr, const char *str);
char *vstr_strdup(vstr_t *vstr);
-char *vstr_to_cstr(vstr_t *vstr);
+const char *vstr_to_cstr(vstr_t *vstr);
#define LEXER_BUFFER 1024