Extension to tzcode to support additional timezones

[Christos Zoulas]

On Oct 26, 10:33am, eggert at cs.ucla.edu (Paul Eggert) wrote:
-- Subject: Re: Extension to tzcode to support additional timezones

| Having an extension like this would be nice, but while we're
| making the interface reentrant, we should also pass in the
| locale as a parameter, for functions like strftime
| that need the locale to do their work.  Many operating
| systems already have strftime_l and we should extend that.
| 
| Also, it would be better to use names that build
| on existing conventions, rather than inventing new names.
| How about if we use a z suffix for the new functions that
| have a time zone parameter?  That would build on the existing
| tradition of using _r and _l for similar extensions.  Something
| like this:
| 
| strftime_lz (for the strftime_l variant that has a time zone parameter)
| localtime_rz (for the localtime_r variant that has a time zone parameter)
| mktime_z (for the mktime variant that has a time zone parameter)

All these sound reasonable, and I will add them.
 
| I agree that it'd be better to have a new opaque type,
| struct tz * (say), rather than void *.

I just have:

typedef struct __state *timezone_t;

christos