Return the system code page based on the program environment.
Source position: unixcp.pp line 644
function GetSystemCodepage: TSystemCodePage;  | 
Detected code page, or system default if no system found.
GetSystemCodepage returns the system code page, based on one of the environment variables LC_ALL, LC_CTYPE or LANG. The first non-empty variable (in the order mentioned here) is used.
If none is found, then a system default is used: Linux and Darwin use CP_UTF8, others use CP_ASCII.
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Map with codepage names.  | 
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Return the system code page based on the program environment.  | 
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Find code page by name.  |