Add fpconv to work around comma decimal points

Create a separate buffer and translate comma <> dot before calling
strtod(), and after calling sprintf() as required.

- Add "update_locale" Lua API call and init locale on module load.
- Move sprintf format string to fpconv

1 files changed, 13 insertions, 1 deletions

diff --git a/strbuf.h b/strbuf.h
index f856543..fbc8651 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -62,7 +62,9 @@ extern void strbuf_resize(strbuf_t *s, int len);
 static int strbuf_empty_length(strbuf_t *s);
 static int strbuf_length(strbuf_t *s);
 static char *strbuf_string(strbuf_t *s, int *len);
-static  void strbuf_ensure_empty_length(strbuf_t *s, int len);
+static void strbuf_ensure_empty_length(strbuf_t *s, int len);
+static char *strbuf_empty_ptr(strbuf_t *s);
+static void strbuf_extend_length(strbuf_t *s, int len);
 
 /* Update */
 extern void strbuf_append_fmt(strbuf_t *s, int len, const char *fmt, ...);
@@ -96,6 +98,16 @@ static inline void strbuf_ensure_empty_length(strbuf_t *s, int len)
         strbuf_resize(s, s->length + len);
 }
 
+static inline char *strbuf_empty_ptr(strbuf_t *s)
+{
+    return s->buf + s->length;
+}
+
+static inline void strbuf_extend_length(strbuf_t *s, int len)
+{
+    s->length += len;
+}
+
 static inline int strbuf_length(strbuf_t *s)
 {
     return s->length;