Support locales which use comma decimal separators

Some locales (cs_CZ, de_DE,..) use a comma as their decimal separator.
This causes CJSON to generate incorrect JSON (Eg, [10,1]), and fail when
parsing some valid JSON (Eg, [10,"test"]).

Added USE_POSIX_LOCALE #define which harnesses the thread-safe
POSIX.1-2008 locale support (newlocale(), uselocale(), freelocale())
to temporarily use the POSIX locale during JSON conversion.

Some older POSIX operating systems with xlocale.h (MacOSX) are also
supported.

1 files changed, 2 insertions, 0 deletions

diff --git a/TODO b/TODO
index 1345448..9dbde9c 100644
--- a/TODO
+++ b/TODO
@@ -2,3 +2,5 @@
   - Optionally create an object for settings. Clone function.
 
 - Convert documentation into structured source format
+
+- Add setlocale() support for non-POSIX 2008 operating systems