Add __UNTAGGED_FILE_ENCODING environment variable #102
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Summary: - Add __UNTAGGED_FILE_ENCODING variable for encoding-first untagged file handling - Support semantic tokens: DETECT, IGNORE, WARN - Support numeric CCSIDs (e.g., 1047, 819, 1208) - Support encoding names via z/OS __toCcsid() (e.g., UTF-8, IBM-1047, ASCII) - New variable takes precedence over legacy __UNTAGGED_READ_MODE - Fully backwards compatible with existing __UNTAGGED_READ_MODE behavior Implementation: - Parser integrated into src/zos.cc (internal, no new library needed) - Added __get_untagged_file_ccsid() getter for CCSID retrieval - Updated __file_needs_conversion_init() to use explicit CCSID when specified - Comprehensive man page documentation with examples Testing: - Integration tests verify parsing, precedence, and behavior mapping - Tests confirm backwards compatibility with legacy variable Limitations: - Current conversion infrastructure supports EBCDIC (1047) ↔ ASCII (819) - Other CCSIDs parsed correctly but conversion limited until iconv() integration
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I am added a new environment variable because the existing __UNTAGGED_READ_MODE is confusing to customers. We will use __UNTAGGED_FILE_ENCODING
Summary:
Implementation:
Testing:
Limitations: